Merge pull request 'Working kernel written on C and userspace-ready' (#1) from dev into main

Reviewed-on: #1

.gitignore

@@ -1,5 +1,8 @@
 .build
+build
 .vscode
 .DS_Store
 compile_commands.json
-.cache
+ide-swift-toolchain.txt
+.cache
+.zed

Bootloader/CMakeLists.txt

@@ -1,46 +1,36 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright (c) 2026 0xKSor
+
 cmake_minimum_required(VERSION 3.20)
 project(ksOS_bootloader LANGUAGES C ASM)
 
-set(UEFI_COMPILE_OPTIONS 
+set(UEFI_COMPILE_OPTIONS
     -std=c23
     -target aarch64-unknown-windows-msvc
     -Wall -Wextra
     -fno-builtin
 )
 
-set(POSIX_UEFI_SOURCES
+add_executable(BOOTAA64
-    Source/uefi/crt_aarch64.c 
+    Source/modules/uefi/efi_entry.c
-    Source/uefi/dirent.c
+    Source/main.c
-    Source/uefi/qsort.c
-    Source/uefi/stat.c
-    Source/uefi/stdio.c
-    Source/uefi/stdlib.c
-    Source/uefi/string.c
-    Source/uefi/time.c
-    Source/uefi/unistd.c
 )
-
-add_library(posix_uefi_lib OBJECT ${POSIX_UEFI_SOURCES})
-target_compile_options(posix_uefi_lib PRIVATE ${UEFI_COMPILE_OPTIONS})
-target_include_directories(posix_uefi_lib PUBLIC ${CMAKE_CURRENT_SOURCE_DIR}/Source/uefi)
-
-
-add_executable(BOOTAA64 Source/main.c)
 target_compile_options(BOOTAA64 PRIVATE ${UEFI_COMPILE_OPTIONS})
-
+target_include_directories(BOOTAA64 PRIVATE
-target_link_libraries(BOOTAA64 PRIVATE posix_uefi_lib)
+    ${CMAKE_CURRENT_SOURCE_DIR}/Source
+    ${CMAKE_CURRENT_SOURCE_DIR}/Source/modules/uefi
+)
 
 target_link_options(BOOTAA64 PRIVATE
     -fuse-ld=lld
     -target aarch64-unknown-windows-msvc
     -nostdlib
     -Wl,-subsystem:efi_application
-    -Wl,-include:uefi_init
+    -Wl,-entry:efi_main
-    -Wl,-entry:uefi_init
 )
 
-set_target_properties(BOOTAA64 PROPERTIES 
+set_target_properties(BOOTAA64 PROPERTIES
     SUFFIX ".EFI"
     OUTPUT_NAME "BOOTAA64"
     RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/efi_bin"
-)
+)

Bootloader/Source/main.c

@@ -1,144 +1,285 @@
-#include "uefi/uefi.h" // IWYU pragma: keep
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include "modules/uefi/uefi.h"
+#include "modules/elf/elf.h"
 #include "../../Common/bootinfo.h"
 
-void print(wchar_t* msg) {
+#define PAGE_SIZE 0x1000
-    ST->ConOut->OutputString(ST->ConOut, msg);
+#define WSTR(str) ((wchar_t*)L##str)
+
+static wchar_t* kernel_path = WSTR("ksOSKernel.elf");
+static efi_guid_t dtb_guid = {
+    0xb1b621d5, 0xf19c, 0x41a5, {0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0}
+};
+
+static void print(const wchar_t* msg) {
+    ST->ConOut->OutputString(ST->ConOut, (wchar_t*)msg);
 }
 
-efi_status_t die() {
+void* memset(void* destination, int value, uint64_t count) {
-    while(1) __asm__ volatile("wfi");
+    uint8_t* ptr = (uint8_t*)destination;
+    while (count--) {
+        *ptr++ = (uint8_t)value;
+    }
+    return destination;
+}
+
+static efi_status_t die(void) {
+    while (1) {
+        __asm__ volatile("wfi");
+    }
+
     return EFI_ABORTED;
 }
 
-int compare_guid(efi_guid_t* a, efi_guid_t* b) {
+static efi_status_t fail(const wchar_t* msg) {
-    uint8_t* p1 = (uint8_t*)a;
+    print(msg);
-    uint8_t* p2 = (uint8_t*)b;
+    return die();
-    for (int i = 0; i < 16; i++) {
+}
-        if (p1[i] != p2[i]) return 0;
+
+static int guid_equal(const efi_guid_t* lhs, const efi_guid_t* rhs) {
+    const uint8_t* lhs_bytes = (const uint8_t*)lhs;
+    const uint8_t* rhs_bytes = (const uint8_t*)rhs;
+
+    for (int i = 0; i < 16; ++i) {
+        if (lhs_bytes[i] != rhs_bytes[i]) {
+            return 0;
+        }
     }
+
     return 1;
 }
 
-int main()
+static void* find_configuration_table(const efi_guid_t* guid) {
-{
+    for (uintn_t i = 0; i < ST->NumberOfTableEntries; ++i) {
-    efi_gop_t* gop = NULL;
+        if (guid_equal(&ST->ConfigurationTable[i].VendorGuid, guid)) {
-    efi_guid_t gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
+            return ST->ConfigurationTable[i].VendorTable;
-    ST->BootServices->LocateProtocol(&gop_guid, 0, (void**)&gop);
-
-    efi_guid_t dtb_guid = {0xb1b621d5, 0xf19c, 0x41a5, {0x83, 0x0b, 0xd9, 0x15, 0x2c, 0x69, 0xaa, 0xe0}};
-    void* dtbAddress = NULL;
-
-    for (uintn_t i = 0; i < ST->NumberOfTableEntries; i++) {
-        if (compare_guid(&ST->ConfigurationTable[i].VendorGuid, &dtb_guid)) {
-            dtbAddress = ST->ConfigurationTable[i].VendorTable;
-            break;
         }
     }
 
-    if (!dtbAddress) {
+    return NULL;
-        print(L"Failed to find DTB!\r\n");
+}
-        return die();
-    }
 
-    efi_loaded_image_protocol_t* loaded_image;
+static efi_status_t open_root_volume(efi_file_handle_t** root) {
-    efi_guid_t lip_guid = EFI_LOADED_IMAGE_PROTOCOL_GUID;
+    efi_loaded_image_protocol_t* loaded_image = NULL;
-    gBS->HandleProtocol(IM, &lip_guid, (void**)&loaded_image);
+    efi_guid_t loaded_image_guid = EFI_LOADED_IMAGE_PROTOCOL_GUID;
-
+    efi_status_t status = gBS->HandleProtocol(IM, &loaded_image_guid, (void**)&loaded_image);
-    efi_simple_file_system_protocol_t* fs;
-    efi_guid_t sfsp_guid = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID;
-    gBS->HandleProtocol(loaded_image->DeviceHandle, &sfsp_guid, (void**)&fs);
-
-    efi_file_handle_t* root;
-    fs->OpenVolume(fs, &root);
-
-    efi_file_handle_t* kernel_file;
-    uintn_t kinfo_size = 0;
-    efi_file_info_t* kfile_info = NULL;
-    efi_guid_t fi_guid = EFI_FILE_INFO_GUID;
-
-    efi_status_t status = root->Open(root, &kernel_file, L"ksOSKernel.bin", EFI_FILE_MODE_READ, 0);
     if (EFI_ERROR(status)) {
-        print(L"Cant find ksOSKernel.bin\r\n");
+        return status;
-        return die();
     }
 
-    status = kernel_file->GetInfo(kernel_file, &fi_guid, &kinfo_size, NULL);
+    efi_simple_file_system_protocol_t* fs = NULL;
-    if (status == EFI_BUFFER_TOO_SMALL) { 
+    efi_guid_t filesystem_guid = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID;
-        gBS->AllocatePool(EfiLoaderData, kinfo_size, (void**)&kfile_info);
+    status = gBS->HandleProtocol(loaded_image->DeviceHandle, &filesystem_guid, (void**)&fs);
-        status = kernel_file->GetInfo(kernel_file, &fi_guid, &kinfo_size, kfile_info);
-    }
-
-    uint64_t kernel_size = kfile_info->FileSize;
-    uintn_t kernel_size_read = (uintn_t)kernel_size;
-    
-    uintn_t kernel_pages = (kernel_size + 0xFFF) / 0x1000;
-    efi_physical_address_t kernel_addr = 0; 
-    
-    status = gBS->AllocatePages(AllocateAnyPages, EfiLoaderData, kernel_pages, &kernel_addr);
     if (EFI_ERROR(status)) {
-        print(L"Failed to allocate ANY memory for kernel!\r\n");
+        return status;
-        return die();
     }
 
-    kernel_file->Read(kernel_file, &kernel_size_read, (void*)kernel_addr); \
+    return fs->OpenVolume(fs, root);
-    printf("Kernel loaded at %p\r\n", (void*)kernel_addr);
+}
 
-    Bootinfo* bootInfo = (Bootinfo*)malloc(sizeof(Bootinfo));
+static efi_status_t read_file_info(efi_file_handle_t* file, efi_file_info_t** file_info) {
-    bootInfo->magic = BOOTINFO_MAGIC;
+    efi_guid_t file_info_guid = EFI_FILE_INFO_GUID;
+    uintn_t file_info_size = 0;
+    efi_status_t status = file->GetInfo(file, &file_info_guid, &file_info_size, NULL);
+    if (status != EFI_BUFFER_TOO_SMALL) {
+        return status;
+    }
 
-    bootInfo->kernelInfo.kernelAddress = (void*)kernel_addr;
+    status = gBS->AllocatePool(EfiLoaderData, file_info_size, (void**)file_info);
-    bootInfo->kernelInfo.kernelSize = kernel_size;
+    if (EFI_ERROR(status)) {
+        return status;
+    }
 
-    bootInfo->framebuffer.base = (BIUInt32*)gop->Mode->FrameBufferBase;
+    return file->GetInfo(file, &file_info_guid, &file_info_size, *file_info);
-    bootInfo->framebuffer.baseSize = gop->Mode->FrameBufferSize;
+}
-    bootInfo->framebuffer.height = gop->Mode->Information->VerticalResolution;
-    bootInfo->framebuffer.width = gop->Mode->Information->HorizontalResolution;
-    bootInfo->framebuffer.pitch = gop->Mode->Information->PixelsPerScanLine;
 
-    bootInfo->dtb = dtbAddress;
+static efi_status_t load_kernel(efi_file_handle_t* root, efi_physical_address_t* kernel_addr, uint64_t* kernel_size, efi_file_handle_t** out_handle) {
-    printf("DTB located at: %p\r\n", (void*)dtbAddress);
+    efi_file_handle_t* kernel_file = NULL;
-    
+    efi_status_t status = root->Open(root, &kernel_file, kernel_path, EFI_FILE_MODE_READ, 0);
+    if (EFI_ERROR(status)) return status;
+
+    efi_file_info_t* kernel_info = NULL;
+    status = read_file_info(kernel_file, &kernel_info);
+    if (EFI_ERROR(status)) return status;
+
+    *kernel_size = kernel_info->FileSize;
+    uintn_t kernel_pages = (*kernel_size + PAGE_SIZE - 1) / PAGE_SIZE;
+
+    status = gBS->AllocatePages(AllocateAnyPages, EfiLoaderData, kernel_pages, kernel_addr);
+    if (EFI_ERROR(status)) return status;
+
+    uintn_t bytes_to_read = (uintn_t)*kernel_size;
+    status = kernel_file->Read(kernel_file, &bytes_to_read, (void*)*kernel_addr);
+    if (EFI_ERROR(status)) return status;
+
+    *out_handle = kernel_file;
+    return EFI_SUCCESS;
+}
+
+static efi_status_t parse_elf_headers(efi_physical_address_t kernel_addr) {
+    Elf64_Ehdr* elf_header = (Elf64_Ehdr*)kernel_addr;
+
+    if (elf_header->e_ident[0] != 0x7f || elf_header->e_ident[1] != 'E' ||
+        elf_header->e_ident[2] != 'L'  || elf_header->e_ident[3] != 'F') {
+        return fail(WSTR("Invalid ELF header\r\n"));
+    }
+    if (elf_header->e_machine != 0xB7) { // AArch64
+        return fail(WSTR("Invalid ELF machine\r\n"));
+    }
+
+    return EFI_SUCCESS;
+}
+
+static efi_status_t load_elf_segments(efi_physical_address_t kernel_addr, efi_file_handle_t* kernel_file, efi_physical_address_t* out_phys_entry) {
+    Elf64_Ehdr* elf_header = (Elf64_Ehdr*)kernel_addr;
+    *out_phys_entry = 0;
+
+    for (int i = 0; i < elf_header->e_phnum; i++) {
+        Elf64_Phdr* phdr = (Elf64_Phdr*)(kernel_addr + elf_header->e_phoff + i * elf_header->e_phentsize);
+
+        if (phdr->p_type != PT_LOAD) continue;
+
+        uintn_t pages = (phdr->p_memsz + 0xFFF) / 0x1000;
+
+        efi_physical_address_t segment_addr = phdr->p_paddr;
+
+        efi_status_t status = gBS->AllocatePages(AllocateAddress, EfiLoaderData, pages, &segment_addr);
+        if (EFI_ERROR(status)) {
+            if (status == EFI_NOT_FOUND) print(WSTR(" (Range not in RAM) "));
+            if (status == EFI_OUT_OF_RESOURCES) print(WSTR(" (Occupied) "));
+            return fail(WSTR("Address conflict!\r\n"));
+        }
+
+        memset((void*)segment_addr, 0, phdr->p_memsz);
+        kernel_file->SetPosition(kernel_file, phdr->p_offset);
+
+        uintn_t size_to_read = phdr->p_filesz;
+        status = kernel_file->Read(kernel_file, &size_to_read, (void*)segment_addr);
+        if (EFI_ERROR(status) || size_to_read != phdr->p_filesz) {
+            return fail(WSTR("File read error\r\n"));
+        }
+
+        if (elf_header->e_entry >= phdr->p_vaddr && elf_header->e_entry < phdr->p_vaddr + phdr->p_memsz) {
+            uint64_t entry_offset = elf_header->e_entry - phdr->p_vaddr;
+            *out_phys_entry = segment_addr + entry_offset;
+        }
+    }
+
+    if (*out_phys_entry == 0) {
+        return fail(WSTR("Entry point not found in PT_LOAD segments\r\n"));
+    }
+
+    return EFI_SUCCESS;
+}
+
+static efi_status_t populate_memory_map(Bootinfo* boot_info) {
     uintn_t map_size = 0;
-    efi_memory_descriptor_t *map = NULL;
+    efi_memory_descriptor_t* map = NULL;
-    uintn_t map_key;
+    uintn_t map_key = 0;
-    uintn_t desc_size;
+    uintn_t descriptor_size = 0;
-    uint32_t desc_version;
+    uint32_t descriptor_version = 0;
 
+    efi_status_t status = gBS->GetMemoryMap(&map_size, NULL, &map_key, &descriptor_size, &descriptor_version);
+    if (status != EFI_BUFFER_TOO_SMALL) {
+        return status;
+    }
 
-    print(L"Almost ready to jump :D. Working with memory map\r\n");
+    map_size += PAGE_SIZE;
-
-    gBS->GetMemoryMap(&map_size, NULL, &map_key, &desc_size, &desc_version);
-    map_size += 4096;
-    // woah letsgoo
     status = gBS->AllocatePool(EfiLoaderData, map_size, (void**)&map);
     if (EFI_ERROR(status)) {
-        print(L"Failed to allocate pool\r\n");
+        return status;
     }
 
-    do {
+    while (1) {
-        status = gBS->GetMemoryMap(&map_size, map, &map_key, &desc_size, &desc_version);
+        status = gBS->GetMemoryMap(&map_size, map, &map_key, &descriptor_size, &descriptor_version);
         if (EFI_ERROR(status)) {
-            break;
+            gBS->FreePool(map);
+            return status;
         }
-        
+
-        bootInfo->memoryMap.descriptorSize = desc_size;
+        boot_info->memoryMap.descriptorSize = descriptor_size;
-        bootInfo->memoryMap.descriptorVersion = desc_version;
+        boot_info->memoryMap.descriptorVersion = descriptor_version;
-        bootInfo->memoryMap.mapSize = map_size;
+        boot_info->memoryMap.mapSize = map_size;
-        bootInfo->memoryMap.mapKey = map_key;
+        boot_info->memoryMap.mapKey = map_key;
-        bootInfo->memoryMap.map = map;
+        boot_info->memoryMap.map = map;
 
         status = gBS->ExitBootServices(IM, map_key);
         if (status == EFI_SUCCESS) {
-            break; // FUCK OFF;
+            return EFI_SUCCESS;
         }
-        map_size += 2 * desc_size; 
-    } while (EFI_ERROR(status));
 
-    typedef void (__attribute__((sysv_abi)) *kentry)(Bootinfo*);
+        gBS->FreePool(map);
-    kentry kmain = (kentry)kernel_addr;
+        map_size += 2 * descriptor_size;
+        status = gBS->AllocatePool(EfiLoaderData, map_size, (void**)&map);
+        if (EFI_ERROR(status)) {
+            return status;
+        }
+    }
+}
 
-    kmain(bootInfo); // yay! :D
+efi_status_t bootloader_main(void) {
+    efi_gop_t* gop = NULL;
+    efi_guid_t gop_guid = EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID;
+    efi_status_t status = ST->BootServices->LocateProtocol(&gop_guid, 0, (void**)&gop);
+    if (EFI_ERROR(status) || gop == NULL) {
+        return fail(WSTR("Failed to locate GOP\r\n"));
+    }
 
+    void* dtb_address = find_configuration_table(&dtb_guid);
+    if (dtb_address == NULL) {
+        return fail(WSTR("Failed to find DTB\r\n"));
+    }
+
+    efi_file_handle_t* root = NULL;
+    status = open_root_volume(&root);
+    if (EFI_ERROR(status)) {
+        return fail(WSTR("Failed to open boot volume\r\n"));
+    }
+
+    efi_physical_address_t kernel_addr = 0;
+    uint64_t kernel_size = 0;
+    efi_file_handle_t* kernel_file = NULL;
+    status = load_kernel(root, &kernel_addr, &kernel_size, &kernel_file);
+    if (EFI_ERROR(status)) {
+        return fail(WSTR("Failed to load ksOSKernel.bin\r\n"));
+    }
+
+    Elf64_Ehdr* elf_header = (Elf64_Ehdr*)kernel_addr;
+
+    status = parse_elf_headers(kernel_addr);
+    if (EFI_ERROR(status)) return status;
+
+    efi_physical_address_t phys_entry = 0;
+    status = load_elf_segments(kernel_addr, kernel_file, &phys_entry);
+    if (EFI_ERROR(status)) return status;
+
+    Bootinfo* boot_info = NULL;
+    status = gBS->AllocatePool(EfiLoaderData, sizeof(Bootinfo), (void**)&boot_info);
+    if (EFI_ERROR(status) || boot_info == NULL) {
+        return fail(WSTR("Failed to allocate boot info\r\n"));
+    }
+
+    boot_info->magic = BOOTINFO_MAGIC;
+    boot_info->kernelInfo.kernelAddress = (void*)kernel_addr;
+    boot_info->kernelInfo.kernelSize = kernel_size;
+    boot_info->framebuffer.base = (BIUInt32*)gop->Mode->FrameBufferBase;
+    boot_info->framebuffer.baseSize = gop->Mode->FrameBufferSize;
+    boot_info->framebuffer.height = gop->Mode->Information->VerticalResolution;
+    boot_info->framebuffer.width = gop->Mode->Information->HorizontalResolution;
+    boot_info->framebuffer.pitch = gop->Mode->Information->PixelsPerScanLine;
+    boot_info->dtb = dtb_address;
+
+    print(WSTR("Almost ready to jump. Reading memory map\r\n"));
+    status = populate_memory_map(boot_info);
+    if (EFI_ERROR(status)) {
+        return fail(WSTR("Failed to exit boot services\r\n"));
+    }
+
+    typedef void (*kernel_entry_t)(Bootinfo*);
+    kernel_entry_t kernel_main = (kernel_entry_t)phys_entry;
+    kernel_main(boot_info);
 
     return EFI_SUCCESS;
-}
+}

Bootloader/Source/modules/elf/elf.h

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include "../../modules/uefi/uefi.h" // IWYU pragma: keep
+
+typedef struct {
+    uint8_t  e_ident[16];
+    uint16_t e_type;
+    uint16_t e_machine;
+    uint32_t e_version;
+    uint64_t e_entry;
+    uint64_t e_phoff;
+    uint64_t e_shoff;
+    uint32_t e_flags;
+    uint16_t e_ehsize;
+    uint16_t e_phentsize;
+    uint16_t e_phnum;
+    uint16_t e_shentsize;
+    uint16_t e_shnum;
+    uint16_t e_shstrndx;
+} Elf64_Ehdr;
+
+typedef struct {
+    uint32_t p_type;
+    uint32_t p_flags;
+    uint64_t p_offset;
+    uint64_t p_vaddr;
+    uint64_t p_paddr;
+    uint64_t p_filesz;
+    uint64_t p_memsz;
+    uint64_t p_align;
+} Elf64_Phdr;
+
+#define PT_LOAD 1

Bootloader/Source/modules/uefi/efi_entry.c

@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include "uefi.h"
+
+efi_handle_t IM = NULL;
+efi_system_table_t* ST = NULL;
+efi_boot_services_t* BS = NULL;
+efi_runtime_services_t* RT = NULL;
+
+efi_status_t bootloader_main(void);
+
+void __chkstk(void) {}
+
+efi_status_t EFIAPI efi_main(efi_handle_t image, efi_system_table_t* system_table) {
+    if (image == NULL || system_table == NULL || system_table->BootServices == NULL) {
+        return EFI_UNSUPPORTED;
+    }
+
+    IM = image;
+    ST = system_table;
+    BS = system_table->BootServices;
+    RT = system_table->RuntimeServices;
+
+    return bootloader_main();
+}

Bootloader/Source/modules/uefi/uefi.h

@@ -0,0 +1,403 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+
+typedef unsigned char uint8_t;
+typedef unsigned short uint16_t;
+typedef unsigned int uint32_t;
+typedef unsigned long long uint64_t;
+typedef int int32_t;
+typedef long long int64_t;
+typedef uint64_t uintptr_t;
+typedef int64_t intn_t;
+typedef uint64_t uintn_t;
+typedef uint8_t boolean_t;
+typedef uint64_t efi_status_t;
+typedef uint64_t efi_tpl_t;
+typedef uint64_t efi_physical_address_t;
+typedef uint64_t efi_virtual_address_t;
+typedef void* efi_handle_t;
+typedef void* efi_event_t;
+
+#ifndef NULL
+#define NULL ((void*)0)
+#endif
+
+#ifndef __cplusplus
+typedef uint16_t wchar_t;
+#endif
+
+#ifndef EFIAPI
+#define EFIAPI
+#endif
+
+#define EFIERR(value) (0x8000000000000000ULL | (uint32_t)(value))
+#define EFI_ERROR(status) (((intn_t)(status)) < 0)
+
+#define EFI_SUCCESS 0
+#define EFI_LOAD_ERROR EFIERR(1)
+#define EFI_UNSUPPORTED EFIERR(3)
+#define EFI_BUFFER_TOO_SMALL EFIERR(5)
+#define EFI_OUT_OF_RESOURCES EFIERR(9)
+#define EFI_NOT_FOUND EFIERR(14)
+#define EFI_ABORTED EFIERR(21)
+
+#define EFI_OPEN_PROTOCOL_GET_PROTOCOL 0x00000002
+#define EFI_FILE_MODE_READ 0x0000000000000001ULL
+
+#define EFI_LOADED_IMAGE_PROTOCOL_GUID \
+    {0x5B1B31A1, 0x9562, 0x11d2, {0x8E, 0x3F, 0x00, 0xA0, 0xC9, 0x69, 0x72, 0x3B}}
+#define EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID \
+    {0x964e5b22, 0x6459, 0x11d2, {0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b}}
+#define EFI_FILE_INFO_GUID \
+    {0x09576e92, 0x6d3f, 0x11d2, {0x8e, 0x39, 0x00, 0xa0, 0xc9, 0x69, 0x72, 0x3b}}
+#define EFI_GRAPHICS_OUTPUT_PROTOCOL_GUID \
+    {0x9042a9de, 0x23dc, 0x4a38, {0x96, 0xfb, 0x7a, 0xde, 0xd0, 0x80, 0x51, 0x6a}}
+
+#define FILENAME_MAX 262
+
+typedef enum {
+    AllocateAnyPages,
+    AllocateMaxAddress,
+    AllocateAddress,
+    MaxAllocateType
+} efi_allocate_type_t;
+
+typedef enum {
+    EfiReservedMemoryType,
+    EfiLoaderCode,
+    EfiLoaderData,
+    EfiBootServicesCode,
+    EfiBootServicesData,
+    EfiRuntimeServicesCode,
+    EfiRuntimeServicesData,
+    EfiConventionalMemory,
+    EfiUnusableMemory,
+    EfiACPIReclaimMemory,
+    EfiACPIMemoryNVS,
+    EfiMemoryMappedIO,
+    EfiMemoryMappedIOPortSpace,
+    EfiPalCode,
+    EfiPersistentMemory,
+    EfiUnacceptedMemoryType,
+    EfiMaxMemoryType
+} efi_memory_type_t;
+
+typedef enum {
+    AllHandles,
+    ByRegisterNotify,
+    ByProtocol
+} efi_locate_search_type_t;
+
+typedef enum {
+    PixelRedGreenBlueReserved8BitPerColor,
+    PixelBlueGreenRedReserved8BitPerColor,
+    PixelBitMask,
+    PixelBltOnly,
+    PixelFormatMax
+} efi_gop_pixel_format_t;
+
+typedef struct {
+    uint32_t Data1;
+    uint16_t Data2;
+    uint16_t Data3;
+    uint8_t Data4[8];
+} efi_guid_t;
+
+typedef struct {
+    uint8_t Type;
+    uint8_t SubType;
+    uint8_t Length[2];
+} efi_device_path_t;
+
+typedef struct {
+    uint32_t Type;
+    uint32_t Pad;
+    efi_physical_address_t PhysicalStart;
+    efi_virtual_address_t VirtualStart;
+    uint64_t NumberOfPages;
+    uint64_t Attribute;
+} efi_memory_descriptor_t;
+
+typedef struct {
+    uint64_t Signature;
+    uint32_t Revision;
+    uint32_t HeaderSize;
+    uint32_t CRC32;
+    uint32_t Reserved;
+} efi_table_header_t;
+
+typedef struct {
+    uint16_t Year;
+    uint8_t Month;
+    uint8_t Day;
+    uint8_t Hour;
+    uint8_t Minute;
+    uint8_t Second;
+    uint8_t Pad1;
+    uint32_t Nanosecond;
+    short TimeZone;
+    uint8_t Daylight;
+    uint8_t Pad2;
+} efi_time_t;
+
+typedef struct {
+    uint16_t ScanCode;
+    wchar_t UnicodeChar;
+} efi_input_key_t;
+
+typedef struct {
+    int32_t MaxMode;
+    int32_t Mode;
+    int32_t Attribute;
+    int32_t CursorColumn;
+    int32_t CursorRow;
+    boolean_t CursorVisible;
+} simple_text_output_mode_t;
+
+typedef efi_status_t (EFIAPI *efi_input_reset_t)(void* this_ptr, boolean_t extended_verification);
+typedef efi_status_t (EFIAPI *efi_input_read_key_t)(void* this_ptr, efi_input_key_t* key);
+typedef efi_status_t (EFIAPI *efi_text_reset_t)(void* this_ptr, boolean_t extended_verification);
+typedef efi_status_t (EFIAPI *efi_text_output_string_t)(void* this_ptr, wchar_t* string);
+typedef efi_status_t (EFIAPI *efi_text_test_string_t)(void* this_ptr, wchar_t* string);
+typedef efi_status_t (EFIAPI *efi_text_query_mode_t)(void* this_ptr, uintn_t mode_number, uintn_t* column, uintn_t* row);
+typedef efi_status_t (EFIAPI *efi_text_set_mode_t)(void* this_ptr, uintn_t mode_number);
+typedef efi_status_t (EFIAPI *efi_text_set_attribute_t)(void* this_ptr, uintn_t attribute);
+typedef efi_status_t (EFIAPI *efi_text_clear_screen_t)(void* this_ptr);
+typedef efi_status_t (EFIAPI *efi_text_set_cursor_t)(void* this_ptr, uintn_t column, uintn_t row);
+typedef efi_status_t (EFIAPI *efi_text_enable_cursor_t)(void* this_ptr, boolean_t enable);
+
+typedef struct {
+    efi_input_reset_t Reset;
+    efi_input_read_key_t ReadKeyStroke;
+    efi_event_t WaitForKey;
+} simple_input_interface_t;
+
+typedef struct {
+    efi_text_reset_t Reset;
+    efi_text_output_string_t OutputString;
+    efi_text_test_string_t TestString;
+    efi_text_query_mode_t QueryMode;
+    efi_text_set_mode_t SetMode;
+    efi_text_set_attribute_t SetAttribute;
+    efi_text_clear_screen_t ClearScreen;
+    efi_text_set_cursor_t SetCursorPosition;
+    efi_text_enable_cursor_t EnableCursor;
+    simple_text_output_mode_t* Mode;
+} simple_text_output_interface_t;
+
+typedef struct efi_runtime_services_t {
+    efi_table_header_t Hdr;
+} efi_runtime_services_t;
+
+typedef struct {
+    efi_handle_t AgentHandle;
+    efi_handle_t ControllerHandle;
+    uint32_t Attributes;
+    uint32_t OpenCount;
+} efi_open_protocol_information_entry_t;
+
+typedef efi_tpl_t (EFIAPI *efi_raise_tpl_t)(efi_tpl_t new_tpl);
+typedef efi_tpl_t (EFIAPI *efi_restore_tpl_t)(efi_tpl_t old_tpl);
+typedef efi_status_t (EFIAPI *efi_allocate_pages_t)(efi_allocate_type_t type, efi_memory_type_t memory_type, uintn_t pages, efi_physical_address_t* memory);
+typedef efi_status_t (EFIAPI *efi_free_pages_t)(efi_physical_address_t memory, uintn_t pages);
+typedef efi_status_t (EFIAPI *efi_get_memory_map_t)(uintn_t* memory_map_size, efi_memory_descriptor_t* memory_map, uintn_t* map_key, uintn_t* descriptor_size, uint32_t* descriptor_version);
+typedef efi_status_t (EFIAPI *efi_allocate_pool_t)(efi_memory_type_t pool_type, uintn_t size, void** buffer);
+typedef efi_status_t (EFIAPI *efi_free_pool_t)(void* buffer);
+typedef void (EFIAPI *efi_event_notify_t)(efi_event_t event, void* context);
+typedef efi_status_t (EFIAPI *efi_create_event_t)(uint32_t type, efi_tpl_t notify_tpl, efi_event_notify_t notify_function, void* context, efi_event_t* event);
+typedef efi_status_t (EFIAPI *efi_set_timer_t)(efi_event_t event, uint32_t type, uint64_t trigger_time);
+typedef efi_status_t (EFIAPI *efi_wait_for_event_t)(uintn_t number_of_events, efi_event_t* event, uintn_t* index);
+typedef efi_status_t (EFIAPI *efi_signal_event_t)(efi_event_t event);
+typedef efi_status_t (EFIAPI *efi_close_event_t)(efi_event_t event);
+typedef efi_status_t (EFIAPI *efi_check_event_t)(efi_event_t event);
+typedef efi_status_t (EFIAPI *efi_handle_protocol_t)(efi_handle_t handle, efi_guid_t* protocol, void** interface);
+typedef efi_status_t (EFIAPI *efi_register_protocol_notify_t)(efi_guid_t* protocol, efi_event_t event, void** registration);
+typedef efi_status_t (EFIAPI *efi_locate_handle_t)(efi_locate_search_type_t search_type, efi_guid_t* protocol, void* search_key, uintn_t* buffer_size, efi_handle_t* buffer);
+typedef efi_status_t (EFIAPI *efi_locate_device_path_t)(efi_guid_t* protocol, efi_device_path_t** device_path, efi_handle_t* device);
+typedef efi_status_t (EFIAPI *efi_install_configuration_table_t)(efi_guid_t* guid, void* table);
+typedef efi_status_t (EFIAPI *efi_image_load_t)(boolean_t boot_policy, efi_handle_t parent_image_handle, efi_device_path_t* file_path, void* source_buffer, uintn_t source_size, efi_handle_t* image_handle);
+typedef efi_status_t (EFIAPI *efi_image_start_t)(efi_handle_t image_handle, uintn_t* exit_data_size, wchar_t** exit_data);
+typedef efi_status_t (EFIAPI *efi_exit_t)(efi_handle_t image_handle, efi_status_t exit_status, uintn_t exit_data_size, wchar_t* exit_data);
+typedef efi_status_t (EFIAPI *efi_exit_boot_services_t)(efi_handle_t image_handle, uintn_t map_key);
+typedef efi_status_t (EFIAPI *efi_get_next_monotonic_t)(uint64_t* count);
+typedef efi_status_t (EFIAPI *efi_stall_t)(uintn_t microseconds);
+typedef efi_status_t (EFIAPI *efi_set_watchdog_timer_t)(uintn_t timeout, uint64_t watchdog_code, uintn_t data_size, wchar_t* watchdog_data);
+typedef efi_status_t (EFIAPI *efi_connect_controller_t)(efi_handle_t controller_handle, efi_handle_t* driver_image_handle, efi_device_path_t* remaining_device_path, boolean_t recursive);
+typedef efi_status_t (EFIAPI *efi_disconnect_controller_t)(efi_handle_t controller_handle, efi_handle_t driver_image_handle, efi_handle_t child_handle);
+typedef efi_status_t (EFIAPI *efi_open_protocol_t)(efi_handle_t handle, efi_guid_t* protocol, void** interface, efi_handle_t agent_handle, efi_handle_t controller_handle, uint32_t attributes);
+typedef efi_status_t (EFIAPI *efi_close_protocol_t)(efi_handle_t handle, efi_guid_t* protocol, efi_handle_t agent_handle, efi_handle_t controller_handle);
+typedef efi_status_t (EFIAPI *efi_open_protocol_information_t)(efi_handle_t handle, efi_guid_t* protocol, efi_open_protocol_information_entry_t** entry_buffer, uintn_t* entry_count);
+typedef efi_status_t (EFIAPI *efi_protocols_per_handle_t)(efi_handle_t handle, efi_guid_t*** protocol_buffer, uintn_t* protocol_buffer_count);
+typedef efi_status_t (EFIAPI *efi_locate_handle_buffer_t)(efi_locate_search_type_t search_type, efi_guid_t* protocol, void* search_key, uintn_t* handle_count, efi_handle_t** handles);
+typedef efi_status_t (EFIAPI *efi_locate_protocol_t)(efi_guid_t* protocol, void* registration, void** interface);
+typedef efi_status_t (EFIAPI *efi_calculate_crc32_t)(void* data, uintn_t data_size, uint32_t* crc32);
+
+typedef struct {
+    efi_table_header_t Hdr;
+    efi_raise_tpl_t RaiseTPL;
+    efi_restore_tpl_t RestoreTPL;
+    efi_allocate_pages_t AllocatePages;
+    efi_free_pages_t FreePages;
+    efi_get_memory_map_t GetMemoryMap;
+    efi_allocate_pool_t AllocatePool;
+    efi_free_pool_t FreePool;
+    efi_create_event_t CreateEvent;
+    efi_set_timer_t SetTimer;
+    efi_wait_for_event_t WaitForEvent;
+    efi_signal_event_t SignalEvent;
+    efi_close_event_t CloseEvent;
+    efi_check_event_t CheckEvent;
+    void* InstallProtocolInterface;
+    void* ReinstallProtocolInterface;
+    void* UninstallProtocolInterface;
+    efi_handle_protocol_t HandleProtocol;
+    efi_handle_protocol_t PCHandleProtocol;
+    efi_register_protocol_notify_t RegisterProtocolNotify;
+    efi_locate_handle_t LocateHandle;
+    efi_locate_device_path_t LocateDevicePath;
+    efi_install_configuration_table_t InstallConfigurationTable;
+    efi_image_load_t LoadImage;
+    efi_image_start_t StartImage;
+    efi_exit_t Exit;
+    void* UnloadImage;
+    efi_exit_boot_services_t ExitBootServices;
+    efi_get_next_monotonic_t GetNextHighMonotonicCount;
+    efi_stall_t Stall;
+    efi_set_watchdog_timer_t SetWatchdogTimer;
+    efi_connect_controller_t ConnectController;
+    efi_disconnect_controller_t DisconnectController;
+    efi_open_protocol_t OpenProtocol;
+    efi_close_protocol_t CloseProtocol;
+    efi_open_protocol_information_t OpenProtocolInformation;
+    efi_protocols_per_handle_t ProtocolsPerHandle;
+    efi_locate_handle_buffer_t LocateHandleBuffer;
+    efi_locate_protocol_t LocateProtocol;
+    void* InstallMultipleProtocolInterfaces;
+    void* UninstallMultipleProtocolInterfaces;
+    efi_calculate_crc32_t CalculateCrc32;
+} efi_boot_services_t;
+
+typedef struct {
+    uint32_t Revision;
+    efi_handle_t ParentHandle;
+    void* SystemTable;
+    efi_handle_t DeviceHandle;
+    efi_device_path_t* FilePath;
+    void* Reserved;
+    uint32_t LoadOptionsSize;
+    void* LoadOptions;
+    void* ImageBase;
+    uint64_t ImageSize;
+    efi_memory_type_t ImageCodeType;
+    efi_memory_type_t ImageDataType;
+} efi_loaded_image_protocol_t;
+
+typedef struct {
+    efi_guid_t VendorGuid;
+    void* VendorTable;
+} efi_configuration_table_t;
+
+typedef struct {
+    efi_table_header_t Hdr;
+    wchar_t* FirmwareVendor;
+    uint32_t FirmwareRevision;
+    efi_handle_t ConsoleInHandle;
+    simple_input_interface_t* ConIn;
+    efi_handle_t ConsoleOutHandle;
+    simple_text_output_interface_t* ConOut;
+    efi_handle_t ConsoleErrorHandle;
+    simple_text_output_interface_t* StdErr;
+    efi_runtime_services_t* RuntimeServices;
+    efi_boot_services_t* BootServices;
+    uintn_t NumberOfTableEntries;
+    efi_configuration_table_t* ConfigurationTable;
+} efi_system_table_t;
+
+typedef struct efi_file_handle_s efi_file_handle_t;
+
+typedef efi_status_t (EFIAPI *efi_volume_open_t)(void* this_ptr, efi_file_handle_t** root);
+typedef struct {
+    uint64_t Revision;
+    efi_volume_open_t OpenVolume;
+} efi_simple_file_system_protocol_t;
+
+typedef struct {
+    uint64_t Size;
+    uint64_t FileSize;
+    uint64_t PhysicalSize;
+    efi_time_t CreateTime;
+    efi_time_t LastAccessTime;
+    efi_time_t ModificationTime;
+    uint64_t Attribute;
+    wchar_t FileName[FILENAME_MAX];
+} efi_file_info_t;
+
+typedef efi_status_t (EFIAPI *efi_file_open_t)(efi_file_handle_t* file, efi_file_handle_t** new_handle, wchar_t* file_name, uint64_t open_mode, uint64_t attributes);
+typedef efi_status_t (EFIAPI *efi_file_close_t)(efi_file_handle_t* file);
+typedef efi_status_t (EFIAPI *efi_file_delete_t)(efi_file_handle_t* file);
+typedef efi_status_t (EFIAPI *efi_file_read_t)(efi_file_handle_t* file, uintn_t* buffer_size, void* buffer);
+typedef efi_status_t (EFIAPI *efi_file_write_t)(efi_file_handle_t* file, uintn_t* buffer_size, void* buffer);
+typedef efi_status_t (EFIAPI *efi_file_get_pos_t)(efi_file_handle_t* file, uint64_t* position);
+typedef efi_status_t (EFIAPI *efi_file_set_pos_t)(efi_file_handle_t* file, uint64_t position);
+typedef efi_status_t (EFIAPI *efi_file_get_info_t)(efi_file_handle_t* file, efi_guid_t* information_type, uintn_t* buffer_size, void* buffer);
+typedef efi_status_t (EFIAPI *efi_file_set_info_t)(efi_file_handle_t* file, efi_guid_t* information_type, uintn_t buffer_size, void* buffer);
+typedef efi_status_t (EFIAPI *efi_file_flush_t)(efi_file_handle_t* file);
+
+struct efi_file_handle_s {
+    uint64_t Revision;
+    efi_file_open_t Open;
+    efi_file_close_t Close;
+    efi_file_delete_t Delete;
+    efi_file_read_t Read;
+    efi_file_write_t Write;
+    efi_file_get_pos_t GetPosition;
+    efi_file_set_pos_t SetPosition;
+    efi_file_get_info_t GetInfo;
+    efi_file_set_info_t SetInfo;
+    efi_file_flush_t Flush;
+};
+
+typedef struct {
+    uint32_t RedMask;
+    uint32_t GreenMask;
+    uint32_t BlueMask;
+    uint32_t ReservedMask;
+} efi_gop_pixel_bitmask_t;
+
+typedef struct {
+    uint32_t Version;
+    uint32_t HorizontalResolution;
+    uint32_t VerticalResolution;
+    efi_gop_pixel_format_t PixelFormat;
+    efi_gop_pixel_bitmask_t PixelInformation;
+    uint32_t PixelsPerScanLine;
+} efi_gop_mode_info_t;
+
+typedef struct {
+    uint32_t MaxMode;
+    uint32_t Mode;
+    efi_gop_mode_info_t* Information;
+    uintn_t SizeOfInfo;
+    efi_physical_address_t FrameBufferBase;
+    uintn_t FrameBufferSize;
+} efi_gop_mode_t;
+
+typedef efi_status_t (EFIAPI *efi_gop_query_mode_t)(void* this_ptr, uint32_t mode_number, uintn_t* size_of_info, efi_gop_mode_info_t** info);
+typedef efi_status_t (EFIAPI *efi_gop_set_mode_t)(void* this_ptr, uint32_t mode_number);
+typedef efi_status_t (EFIAPI *efi_gop_blt_t)(void* this_ptr, uint32_t* blt_buffer, uint32_t blt_operation, uintn_t source_x, uintn_t source_y, uintn_t destination_x, uintn_t destination_y, uintn_t width, uintn_t height, uintn_t delta);
+
+typedef struct {
+    efi_gop_query_mode_t QueryMode;
+    efi_gop_set_mode_t SetMode;
+    efi_gop_blt_t Blt;
+    efi_gop_mode_t* Mode;
+} efi_gop_t;
+
+extern efi_handle_t IM;
+extern efi_system_table_t* ST;
+extern efi_boot_services_t* BS;
+extern efi_runtime_services_t* RT;
+
+#define gBS BS

Bootloader/Source/uefi/Makefile

@@ -1,135 +0,0 @@
-# detect architecture
-MYARCH = $(shell uname -m | sed s,i[3456789]86,ia32, | sed s,amd,x86_,)
-ifeq ($(ARCH),)
-ARCH = $(MYARCH)
-endif
-
-# get source files, generate object names
-ifeq ($(SRCS),)
-SRCS = $(wildcard *.c) $(wildcard *.S)
-endif
-ifeq ($(OBJS),)
-TMP = $(SRCS:.c=.o)
-OBJS = $(TMP:.S=.o)
-endif
-ifneq ($(OUTDIR),)
-# OUTDIR is not used with uefi/*.o deliberately
-OUTDIR:=$(addsuffix /,$(OUTDIR))
-endif
-CFLAGS += -fshort-wchar -fno-strict-aliasing -ffreestanding -fno-stack-protector -fno-stack-check -I. -I./uefi \
-  -I/usr/include -I/usr/include/efi -I/usr/include/efi/protocol -I/usr/include/efi/$(ARCH) -D__$(ARCH)__
-ifeq ($(ARCH),x86_64)
-CFLAGS += -DHAVE_USE_MS_ABI -mno-red-zone
-endif
-
-# for libuefi.a
-LIBSRCS = $(filter-out $(wildcard crt_*.c),$(wildcard *.c)) $(wildcard *.S)
-TMP2 = $(LIBSRCS:.c=.o)
-LIBOBJS = $(TMP2:.S=.o)
-MAKE ?= make
-
-# detect toolchain
-ifeq ($(wildcard /usr/bin/clang)$(wildcard /usr/local/bin/clang)$(wildcard /usr/lib/llvm/*/bin/clang)$(wildcard /gnu/store/*/bin/clang),)
-USE_GCC = 1
-endif
-ifneq ($(USE_GCC),)
-ifeq ($(ARCH),x86_64)
-CFLAGS += -maccumulate-outgoing-args
-endif
-CFLAGS += -Wno-builtin-declaration-mismatch -fpic -fPIC
-LDFLAGS += -nostdlib -shared -Bsymbolic -Luefi uefi/crt_$(ARCH).o
-LIBS += -o $(addprefix $(OUTDIR),$(TARGET).so) -luefi -T uefi/elf_$(ARCH)_efi.lds
-# see if we're cross-compiling
-ifneq ($(ARCH),$(MYARCH))
-CC = $(ARCH)-elf-gcc
-LD = $(ARCH)-elf-ld
-OBJCOPY ?= $(ARCH)-elf-objcopy
-else
-CC = gcc
-LD = ld
-OBJCOPY ?= objcopy
-endif
-ifeq ($(ARCH),aarch64)
-EFIARCH = pei-aarch64-little
-else
-ifeq ($(ARCH),riscv64)
-EFIARCH = pei-riscv64-little
-else
-EFIARCH = efi-app-$(ARCH)
-endif
-endif
-AR ?= ar
-else
-CFLAGS += --target=$(ARCH)-pc-win32-coff -Wno-builtin-requires-header -Wno-incompatible-library-redeclaration -Wno-long-long
-LDFLAGS += -subsystem:efi_application -nodefaultlib -dll -entry:uefi_init uefi/*.o
-LIBS = -out:$(addprefix $(OUTDIR),$(TARGET))
-CC = clang
-LD = lld -flavor link
-OBJCOPY = true
-endif
-
-# recipies
-ifeq ($(wildcard uefi/Makefile),)
-ALLTARGETS = crt_$(ARCH).o libuefi.a buildlib
-else
-ALLTARGETS = uefi/crt_$(ARCH).o uefi/libuefi.a $(OBJS) $(TARGET)
-endif
-
-all: $(OUTDIR) $(EXTRA) $(ALLTARGETS) $(ALSO)
-
-ifneq ($(OUTDIR),)
-$(OUTDIR):
-	@mkdir -p $(OUTDIR)
-endif
-
-uefi/libuefi.a:
-	@$(MAKE) --no-print-directory -C uefi libuefi.a USE_GCC=$(USE_GCC) ARCH=$(ARCH)
-
-libuefi.lib: $(LIBOBJS)
-
-libuefi.a: $(LIBOBJS)
-	@rm $@ 2>/dev/null || true
-	$(AR) -rsv $@ $(LIBOBJS) >/dev/null
-
-$(TARGET): $(addprefix $(OUTDIR),$(TARGET).so)
-ifneq ($(USE_GCC),)
-	$(OBJCOPY) -j .text -j .sdata -j .data -j .dynamic -j .dynsym  -j .rel -j .rela -j .rel.* -j .rela.* -j .reloc --target $(EFIARCH) --subsystem=10 $^ $(addprefix $(OUTDIR),$@) || echo target: $(EFIARCH)
-	@rm $(addprefix $(OUTDIR),$(TARGET).so)
-endif
-
-$(addprefix $(OUTDIR),$(TARGET).so): $(addprefix $(OUTDIR),$(OBJS)) $(EXTRA)
-	$(LD) $(LDFLAGS) $^ $(LIBS)
-	@rm $(addprefix $(OUTDIR),*.lib) 2>/dev/null || true
-
-uefi/%.o: uefi/%.c
-	$(CC) $(CFLAGS) -c $< -o $@
-
-%.o: %.c
-	$(CC) $(CFLAGS) -c $< -o $(addprefix $(OUTDIR),$@)
-
-%.o: %.S
-	$(CC) $(CFLAGS) -c $< -o $(addprefix $(OUTDIR),$@)
-
-buildlib:
-	@mkdir ../build ../build/uefi 2>/dev/null || true
-	@cp crt_$(ARCH).o ../build/uefi/crt0.o
-	@cp elf_$(ARCH)_efi.lds ../build/uefi/link.ld
-ifneq ($(USE_GCC),)
-	@cp libuefi.a uefi.h ../build/uefi
-else
-	@cp uefi.h ../build/uefi
-	@cp libuefi.a ../build/uefi/libuefi.dll.a
-endif
-
-clean:
-	@rm $(addprefix $(OUTDIR),$(TARGET)) *.o *.a *.lib *.elf $(LIBOBJS) 2>/dev/null || true
-ifneq ($(OUTDIR),)
-	@rm -rf $(OUTDIR)
-endif
-
-distclean: clean
-ifeq ($(wildcard uefi/Makefile),)
-	@rm -rf ../build 2>/dev/null || true
-else
-	@rm uefi/*.o uefi/libuefi.a 2>/dev/null || true
-endif

Bootloader/Source/uefi/crt_aarch64.c

@@ -1,239 +0,0 @@
-/*
- * crt_aarch64.c
- *
- * Copyright (C) 2021 bzt (bztsrc@gitlab)
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * This file is part of the POSIX-UEFI package.
- * @brief C runtime, bootstraps an EFI application to call standard main()
- *
- */
-
-#include <uefi.h>
-
-/* this is implemented by the application */
-extern int main(int argc, char_t **argv);
-
-/* definitions for elf relocations */
-#ifndef __clang__
-typedef uint64_t Elf64_Xword;
-typedef	int64_t  Elf64_Sxword;
-typedef uint64_t Elf64_Addr;
-typedef struct
-{
-  Elf64_Sxword  d_tag;              /* Dynamic entry type */
-  union
-    {
-      Elf64_Xword d_val;            /* Integer value */
-      Elf64_Addr d_ptr;             /* Address value */
-    } d_un;
-} Elf64_Dyn;
-#define DT_NULL             0       /* Marks end of dynamic section */
-#define DT_RELA             7       /* Address of Rela relocs */
-#define DT_RELASZ           8       /* Total size of Rela relocs */
-#define DT_RELAENT          9       /* Size of one Rela reloc */
-typedef struct
-{
-  Elf64_Addr    r_offset;           /* Address */
-  Elf64_Xword   r_info;             /* Relocation type and symbol index */
-} Elf64_Rel;
-#define ELF64_R_TYPE(i)     ((i) & 0xffffffff)
-#define R_AARCH64_RELATIVE  1027    /* Adjust by program base */
-#endif
-
-/* globals to store system table pointers */
-efi_handle_t IM = NULL;
-efi_system_table_t *ST = NULL;
-efi_boot_services_t *BS = NULL;
-efi_runtime_services_t *RT = NULL;
-efi_loaded_image_protocol_t *LIP = NULL;
-#ifndef UEFI_NO_UTF8
-char *__argvutf8 = NULL;
-#endif
-
-/* we only need one .o file, so use inline Assembly here */
-void bootstrap(void)
-{
-    __asm__ __volatile__ (
-    /* call init in C */
-    "	.align 4\n"
-#ifndef __clang__
-    "	.globl _start\n"
-    "_start:\n"
-    "	ldr		x2, =ImageBase\n"
-    "	adrp	x3, _DYNAMIC\n"
-    "	add		x3, x3, #:lo12:_DYNAMIC\n"
-    "	bl		uefi_init\n"
-    "	ret\n"
-
-    /* fake a relocation record, so that EFI won't complain */
-    " 	.data\n"
-    "dummy:	.long	0\n"
-    " 	.section .reloc, \"a\"\n"
-    "label1:\n"
-    "	.long	dummy-label1\n"
-    " 	.long	10\n"
-    "    .word 0\n"
-    ".text\n"
-#else
-    "	.globl __chkstk\n"
-    "__chkstk:\n"
-    "	ret\n"
-#endif
-    );
-
-    /* setjmp and longjmp */
-    __asm__ __volatile__ (
-    "	.p2align 3\n"
-    "	.globl	setjmp\n"
-    "setjmp:\n"
-    "	mov	x16, sp\n"
-    "	stp	x19, x20, [x0, #0]\n"
-    "	stp	x21, x22, [x0, #16]\n"
-    "	stp	x23, x24, [x0, #32]\n"
-    "	stp	x25, x26, [x0, #48]\n"
-    "	stp	x27, x28, [x0, #64]\n"
-    "	stp	x29, x30, [x0, #80]\n"
-    "	str	x16, [x0, #96]\n"
-    "	stp	d8, d9, [x0, #112]\n"
-    "	stp	d10, d11, [x0, #128]\n"
-    "	stp	d12, d13, [x0, #144]\n"
-    "	stp	d14, d15, [x0, #160]\n"
-    "	mov	w0, #0\n"
-    "	ret\n"
-    );
-    __asm__ __volatile__ (
-    "	.globl	longjmp\n"
-    "longjmp:\n"
-    "	ldp	x19, x20, [x0, #0]\n"
-    "	ldp	x21, x22, [x0, #16]\n"
-    "	ldp	x23, x24, [x0, #32]\n"
-    "	ldp	x25, x26, [x0, #48]\n"
-    "	ldp	x27, x28, [x0, #64]\n"
-    "	ldp	x29, x30, [x0, #80]\n"
-    "	ldr	x16, [x0, #96]\n"
-    "	ldp	d8, d9, [x0, #112]\n"
-    "	ldp	d10, d11, [x0, #128]\n"
-    "	ldp	d12, d13, [x0, #144]\n"
-    "	ldp	d14, d15, [x0, #160]\n"
-    "	mov	sp, x16\n"
-    "	cmp	w1, #0\n"
-    "	mov	w0, #1\n"
-    "	csel	w0, w1, w0, ne\n"
-    "	br	x30\n"
-    );
-}
-
-/**
- * Initialize POSIX-UEFI and call the application's main() function
- */
-efi_status_t uefi_init (
-    efi_handle_t image, efi_system_table_t *systab
-#ifndef __clang__
-    , uintptr_t ldbase, Elf64_Dyn *dyn
-#endif
-) {
-    efi_guid_t shpGuid = EFI_SHELL_PARAMETERS_PROTOCOL_GUID;
-    efi_shell_parameters_protocol_t *shp = NULL;
-    efi_guid_t shiGuid = SHELL_INTERFACE_PROTOCOL_GUID;
-    efi_shell_interface_protocol_t *shi = NULL;
-    efi_guid_t lipGuid = EFI_LOADED_IMAGE_PROTOCOL_GUID;
-    efi_status_t status;
-    int argc = 0, i, ret;
-    wchar_t **argv = NULL;
-#ifndef UEFI_NO_UTF8
-    int j;
-    char *s;
-#endif
-#ifndef __clang__
-    long relsz = 0, relent = 0;
-    Elf64_Rel *rel = 0;
-    uintptr_t *addr;
-    /* handle relocations */
-    for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
-        switch (dyn[i].d_tag) {
-            case DT_RELA: rel = (Elf64_Rel*)((unsigned long)dyn[i].d_un.d_ptr + ldbase); break;
-            case DT_RELASZ: relsz = dyn[i].d_un.d_val; break;
-            case DT_RELAENT: relent = dyn[i].d_un.d_val; break;
-            default: break;
-        }
-    }
-    if (rel && relent) {
-        while (relsz > 0) {
-            if(ELF64_R_TYPE (rel->r_info) == R_AARCH64_RELATIVE)
-                { addr = (unsigned long *)(ldbase + rel->r_offset); *addr += ldbase; }
-            rel = (Elf64_Rel*) ((char *) rel + relent);
-            relsz -= relent;
-        }
-    }
-#else
-    (void)i;
-#endif
-    /* failsafes, should never happen */
-    if(!image || !systab || !systab->BootServices || !systab->BootServices->HandleProtocol ||
-        !systab->BootServices->OpenProtocol || !systab->BootServices->AllocatePool || !systab->BootServices->FreePool)
-            return EFI_UNSUPPORTED;
-    /* save EFI pointers and loaded image into globals */
-    IM = image;
-    ST = systab;
-    BS = systab->BootServices;
-    RT = systab->RuntimeServices;
-    BS->HandleProtocol(image, &lipGuid, (void **)&LIP);
-    /* get command line arguments */
-    status = BS->OpenProtocol(image, &shpGuid, (void **)&shp, image, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
-    if(!EFI_ERROR(status) && shp) { argc = (int)shp->Argc; argv = shp->Argv; }
-    else {
-        /* if shell 2.0 failed, fallback to shell 1.0 interface */
-        status = BS->OpenProtocol(image, &shiGuid, (void **)&shi, image, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
-        if(!EFI_ERROR(status) && shi) { argc = (int)shi->Argc; argv = shi->Argv; }
-    }
-    /* call main */
-#ifndef UEFI_NO_UTF8
-    if(argc && argv) {
-        ret = (argc + 1) * ((int)sizeof(uintptr_t) + 1);
-        for(i = 0; i < argc; i++)
-            for(j = 0; argv[i] && argv[i][j]; j++)
-                ret += argv[i][j] < 0x80 ? 1 : (argv[i][j] < 0x800 ? 2 : 3);
-        status = BS->AllocatePool(LIP ? LIP->ImageDataType : EfiLoaderData, (uintn_t)ret, (void **)&__argvutf8);
-        if(EFI_ERROR(status) || !__argvutf8) { argc = 0; __argvutf8 = NULL; }
-        else {
-            s = __argvutf8 + argc * (int)sizeof(uintptr_t);
-            *((uintptr_t*)s) = (uintptr_t)0; s += sizeof(uintptr_t);
-            for(i = 0; i < argc; i++) {
-                *((uintptr_t*)(__argvutf8 + i * (int)sizeof(uintptr_t))) = (uintptr_t)s;
-                for(j = 0; argv[i] && argv[i][j]; j++) {
-                    if(argv[i][j]<0x80) { *s++ = argv[i][j]; } else
-                    if(argv[i][j]<0x800) { *s++ = ((argv[i][j]>>6)&0x1F)|0xC0; *s++ = (argv[i][j]&0x3F)|0x80; } else
-                    { *s++ = ((argv[i][j]>>12)&0x0F)|0xE0; *s++ = ((argv[i][j]>>6)&0x3F)|0x80; *s++ = (argv[i][j]&0x3F)|0x80; }
-                }
-                *s++ = 0;
-            }
-        }
-    }
-    ret = main(argc, (char**)__argvutf8);
-    if(__argvutf8) BS->FreePool(__argvutf8);
-    return ret;
-#else
-    ret = main(argc, argv);
-#endif
-    return ret ? EFIERR(ret) : EFI_SUCCESS;
-}

Bootloader/Source/uefi/crt_riscv64.c

@@ -1,270 +0,0 @@
-/*
- * crt_riscv64.c
- *
- * Copyright (C) 2023 bzt (bztsrc@gitlab)
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * This file is part of the POSIX-UEFI package.
- * @brief C runtime, bootstraps an EFI application to call standard main()
- *
- */
-
-#include <uefi.h>
-
-/* this is implemented by the application */
-extern int main(int argc, char_t **argv);
-
-/* definitions for elf relocations */
-#ifndef __clang__
-typedef uint64_t Elf64_Xword;
-typedef	int64_t  Elf64_Sxword;
-typedef uint64_t Elf64_Addr;
-typedef struct
-{
-  Elf64_Sxword  d_tag;              /* Dynamic entry type */
-  union
-    {
-      Elf64_Xword d_val;            /* Integer value */
-      Elf64_Addr d_ptr;             /* Address value */
-    } d_un;
-} Elf64_Dyn;
-#define DT_NULL             0       /* Marks end of dynamic section */
-#define DT_RELA             7       /* Address of Rela relocs */
-#define DT_RELASZ           8       /* Total size of Rela relocs */
-#define DT_RELAENT          9       /* Size of one Rela reloc */
-typedef struct
-{
-  Elf64_Addr    r_offset;           /* Address */
-  Elf64_Xword   r_info;             /* Relocation type and symbol index */
-} Elf64_Rel;
-#define ELF64_R_TYPE(i)     ((i) & 0xffffffff)
-#define R_RISCV_RELATIVE    3       /* Adjust by program base */
-#endif
-
-/* globals to store system table pointers */
-efi_handle_t IM = NULL;
-efi_system_table_t *ST = NULL;
-efi_boot_services_t *BS = NULL;
-efi_runtime_services_t *RT = NULL;
-efi_loaded_image_protocol_t *LIP = NULL;
-#ifndef UEFI_NO_UTF8
-char *__argvutf8 = NULL;
-#endif
-
-/* we only need one .o file, so use inline Assembly here */
-void bootstrap(void)
-{
-    __asm__ __volatile__ (
-    /* call init in C */
-    "	.align 4\n"
-#ifndef __clang__
-    "	.globl _start\n"
-    "_start:\n"
-    "	lla		a2, ImageBase\n"
-    "	lui		a3, %hi(_DYNAMIC)\n"
-    "	addi	a3, a3, %lo(_DYNAMIC)\n"
-    "	call	uefi_init\n"
-    "	ret\n"
-
-    /* fake a relocation record, so that EFI won't complain */
-    " 	.data\n"
-    "dummy:	.long	0\n"
-    " 	.section .reloc, \"a\"\n"
-    "label1:\n"
-    "	.long	dummy-label1\n"
-    " 	.long	10\n"
-    "    .word 0\n"
-    ".text\n"
-#else
-    "	.globl __chkstk\n"
-    "__chkstk:\n"
-    "	ret\n"
-#endif
-    );
-
-    /* setjmp and longjmp */
-    __asm__ __volatile__ (
-    "	.p2align 3\n"
-    "	.globl	setjmp\n"
-    "setjmp:\n"
-    "	sd	ra,  0(a0)\n"
-    "	sd	sp,  8(a0)\n"
-    "	sd	s0,  16(a0)\n"
-    "	sd	s1,  24(a0)\n"
-    "	sd	s2,  32(a0)\n"
-    "	sd	s3,  40(a0)\n"
-    "	sd	s4,  48(a0)\n"
-    "	sd	s5,  56(a0)\n"
-    "	sd	s6,  64(a0)\n"
-    "	sd	s7,  72(a0)\n"
-    "	sd	s8,  80(a0)\n"
-    "	sd	s9,  88(a0)\n"
-    "	sd	s10, 96(a0)\n"
-    "	sd	s11, 104(a0)\n"
-#ifndef __riscv_float_abi_soft
-    "	fsd	fs0, 112(a0)\n"
-    "	fsd	fs1, 120(a0)\n"
-    "	fsd	fs2, 128(a0)\n"
-    "	fsd	fs3, 136(a0)\n"
-    "	fsd	fs4, 144(a0)\n"
-    "	fsd	fs5, 152(a0)\n"
-    "	fsd	fs6, 160(a0)\n"
-    "	fsd	fs7, 168(a0)\n"
-    "	fsd	fs8, 176(a0)\n"
-    "	fsd	fs9, 184(a0)\n"
-    "	fsd	fs10,192(a0)\n"
-    "	fsd	fs11,200(a0)\n"
-#endif
-    "	li	a0, 0\n"
-    "	ret\n"
-    );
-    __asm__ __volatile__ (
-    "	.globl	longjmp\n"
-    "longjmp:\n"
-    "	ld	ra,  0(a0)\n"
-    "	ld	sp,  8(a0)\n"
-    "	ld	s0,  16(a0)\n"
-    "	ld	s1,  24(a0)\n"
-    "	ld	s2,  32(a0)\n"
-    "	ld	s3,  40(a0)\n"
-    "	ld	s4,  48(a0)\n"
-    "	ld	s5,  56(a0)\n"
-    "	ld	s6,  64(a0)\n"
-    "	ld	s7,  72(a0)\n"
-    "	ld	s8,  80(a0)\n"
-    "	ld	s9,  88(a0)\n"
-    "	ld	s10, 96(a0)\n"
-    "	ld	s11, 104(a0)\n"
-#ifndef __riscv_float_abi_soft
-    "	fld	fs0, 112(a0)\n"
-    "	fld	fs1, 120(a0)\n"
-    "	fld	fs2, 128(a0)\n"
-    "	fld	fs3, 136(a0)\n"
-    "	fld	fs4, 144(a0)\n"
-    "	fld	fs5, 152(a0)\n"
-    "	fld	fs6, 160(a0)\n"
-    "	fld	fs7, 168(a0)\n"
-    "	fld	fs8, 176(a0)\n"
-    "	fld	fs9, 184(a0)\n"
-    "	fld	fs10,192(a0)\n"
-    "	fld	fs11,200(a0)\n"
-#endif
-    "	seqz	a0, a1\n"
-    "	add	a0, a0, a1\n"
-    "	ret\n"
-    );
-}
-
-/**
- * Initialize POSIX-UEFI and call the application's main() function
- */
-efi_status_t uefi_init (
-    efi_handle_t image, efi_system_table_t *systab
-#ifndef __clang__
-    , uintptr_t ldbase, Elf64_Dyn *dyn
-#endif
-) {
-    efi_guid_t shpGuid = EFI_SHELL_PARAMETERS_PROTOCOL_GUID;
-    efi_shell_parameters_protocol_t *shp = NULL;
-    efi_guid_t shiGuid = SHELL_INTERFACE_PROTOCOL_GUID;
-    efi_shell_interface_protocol_t *shi = NULL;
-    efi_guid_t lipGuid = EFI_LOADED_IMAGE_PROTOCOL_GUID;
-    efi_status_t status;
-    int argc = 0, i, ret;
-    wchar_t **argv = NULL;
-#ifndef UEFI_NO_UTF8
-    int j;
-    char *s;
-#endif
-#ifndef __clang__
-    long relsz = 0, relent = 0;
-    Elf64_Rel *rel = 0;
-    uintptr_t *addr;
-    /* handle relocations */
-    for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
-        switch (dyn[i].d_tag) {
-            case DT_RELA: rel = (Elf64_Rel*)((unsigned long)dyn[i].d_un.d_ptr + ldbase); break;
-            case DT_RELASZ: relsz = dyn[i].d_un.d_val; break;
-            case DT_RELAENT: relent = dyn[i].d_un.d_val; break;
-            default: break;
-        }
-    }
-    if (rel && relent) {
-        while (relsz > 0) {
-            if(ELF64_R_TYPE (rel->r_info) == R_RISCV_RELATIVE)
-                { addr = (unsigned long *)(ldbase + rel->r_offset); *addr += ldbase; }
-            rel = (Elf64_Rel*) ((char *) rel + relent);
-            relsz -= relent;
-        }
-    }
-#else
-    (void)i;
-#endif
-    /* failsafes, should never happen */
-    if(!image || !systab || !systab->BootServices || !systab->BootServices->HandleProtocol ||
-        !systab->BootServices->OpenProtocol || !systab->BootServices->AllocatePool || !systab->BootServices->FreePool)
-            return EFI_UNSUPPORTED;
-    /* save EFI pointers and loaded image into globals */
-    IM = image;
-    ST = systab;
-    BS = systab->BootServices;
-    RT = systab->RuntimeServices;
-    BS->HandleProtocol(image, &lipGuid, (void **)&LIP);
-    /* get command line arguments */
-    status = BS->OpenProtocol(image, &shpGuid, (void **)&shp, image, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
-    if(!EFI_ERROR(status) && shp) { argc = (int)shp->Argc; argv = shp->Argv; }
-    else {
-        /* if shell 2.0 failed, fallback to shell 1.0 interface */
-        status = BS->OpenProtocol(image, &shiGuid, (void **)&shi, image, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
-        if(!EFI_ERROR(status) && shi) { argc = (int)shi->Argc; argv = shi->Argv; }
-    }
-    /* call main */
-#ifndef UEFI_NO_UTF8
-    if(argc && argv) {
-        ret = (argc + 1) * ((int)sizeof(uintptr_t) + 1);
-        for(i = 0; i < argc; i++)
-            for(j = 0; argv[i] && argv[i][j]; j++)
-                ret += argv[i][j] < 0x80 ? 1 : (argv[i][j] < 0x800 ? 2 : 3);
-        status = BS->AllocatePool(LIP ? LIP->ImageDataType : EfiLoaderData, (uintn_t)ret, (void **)&__argvutf8);
-        if(EFI_ERROR(status) || !__argvutf8) { argc = 0; __argvutf8 = NULL; }
-        else {
-            s = __argvutf8 + argc * (int)sizeof(uintptr_t);
-            *((uintptr_t*)s) = (uintptr_t)0; s += sizeof(uintptr_t);
-            for(i = 0; i < argc; i++) {
-                *((uintptr_t*)(__argvutf8 + i * (int)sizeof(uintptr_t))) = (uintptr_t)s;
-                for(j = 0; argv[i] && argv[i][j]; j++) {
-                    if(argv[i][j]<0x80) { *s++ = argv[i][j]; } else
-                    if(argv[i][j]<0x800) { *s++ = ((argv[i][j]>>6)&0x1F)|0xC0; *s++ = (argv[i][j]&0x3F)|0x80; } else
-                    { *s++ = ((argv[i][j]>>12)&0x0F)|0xE0; *s++ = ((argv[i][j]>>6)&0x3F)|0x80; *s++ = (argv[i][j]&0x3F)|0x80; }
-                }
-                *s++ = 0;
-            }
-        }
-    }
-    ret = main(argc, (char**)__argvutf8);
-    if(__argvutf8) BS->FreePool(__argvutf8);
-    return ret;
-#else
-    ret = main(argc, argv);
-#endif
-    return ret ? EFIERR(ret) : EFI_SUCCESS;
-}

Bootloader/Source/uefi/crt_x86_64.c

@@ -1,241 +0,0 @@
-/*
- * crt_x86_64.c
- *
- * Copyright (C) 2021 bzt (bztsrc@gitlab)
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * This file is part of the POSIX-UEFI package.
- * @brief C runtime, bootstraps an EFI application to call standard main()
- *
- */
-
-#include <uefi.h>
-
-/* this is implemented by the application */
-extern int main(int argc, char_t **argv);
-
-/* definitions for elf relocations */
-#ifndef __clang__
-typedef uint64_t Elf64_Xword;
-typedef	int64_t  Elf64_Sxword;
-typedef uint64_t Elf64_Addr;
-typedef struct
-{
-  Elf64_Sxword  d_tag;              /* Dynamic entry type */
-  union
-    {
-      Elf64_Xword d_val;            /* Integer value */
-      Elf64_Addr d_ptr;             /* Address value */
-    } d_un;
-} Elf64_Dyn;
-#define DT_NULL             0       /* Marks end of dynamic section */
-#define DT_RELA             7       /* Address of Rela relocs */
-#define DT_RELASZ           8       /* Total size of Rela relocs */
-#define DT_RELAENT          9       /* Size of one Rela reloc */
-typedef struct
-{
-  Elf64_Addr    r_offset;           /* Address */
-  Elf64_Xword   r_info;             /* Relocation type and symbol index */
-} Elf64_Rel;
-#define ELF64_R_TYPE(i)     ((i) & 0xffffffff)
-#define R_X86_64_RELATIVE   8       /* Adjust by program base */
-#endif
-
-/* globals to store system table pointers */
-efi_handle_t IM = NULL;
-efi_system_table_t *ST = NULL;
-efi_boot_services_t *BS = NULL;
-efi_runtime_services_t *RT = NULL;
-efi_loaded_image_protocol_t *LIP = NULL;
-#ifndef UEFI_NO_UTF8
-char *__argvutf8 = NULL;
-#endif
-
-/* we only need one .o file, so use inline Assembly here */
-void bootstrap(void)
-{
-    __asm__ __volatile__ (
-    /* call init in C */
-    "	.align 4\n"
-#ifndef __clang__
-    "	.globl _start\n"
-    "_start:\n"
-    "	lea ImageBase(%rip), %rdi\n"
-    "	lea _DYNAMIC(%rip), %rsi\n"
-    "	call uefi_init\n"
-    "	ret\n"
-
-    /* fake a relocation record, so that EFI won't complain */
-    " 	.data\n"
-    "dummy:	.long	0\n"
-    " 	.section .reloc, \"a\"\n"
-    "label1:\n"
-    "	.long	dummy-label1\n"
-    " 	.long	10\n"
-    "    .word 0\n"
-    ".text\n"
-#else
-    "	.globl __chkstk\n"
-    "__chkstk:\n"
-    "	ret\n"
-#endif
-    );
-
-    /* setjmp and longjmp */
-    __asm__ __volatile__ (
-    "	.globl	setjmp\n"
-    "setjmp:\n"
-    "	pop	%rsi\n"
-    "	movq	%rbx,0x00(%rdi)\n"
-    "	movq	%rsp,0x08(%rdi)\n"
-    "	push	%rsi\n"
-    "	movq	%rbp,0x10(%rdi)\n"
-    "	movq	%r12,0x18(%rdi)\n"
-    "	movq	%r13,0x20(%rdi)\n"
-    "	movq	%r14,0x28(%rdi)\n"
-    "	movq	%r15,0x30(%rdi)\n"
-    "	movq	%rsi,0x38(%rdi)\n"
-    "	xor	%rax,%rax\n"
-    "	ret\n"
-    );
-    __asm__ __volatile__ (
-    "	.globl	longjmp\n"
-    "longjmp:\n"
-    "	movl	%esi, %eax\n"
-    "	movq	0x00(%rdi), %rbx\n"
-    "	movq	0x08(%rdi), %rsp\n"
-    "	movq	0x10(%rdi), %rbp\n"
-    "	movq	0x18(%rdi), %r12\n"
-    "	movq	0x20(%rdi), %r13\n"
-    "	movq	0x28(%rdi), %r14\n"
-    "	movq	0x30(%rdi), %r15\n"
-    "	xor	%rdx,%rdx\n"
-    "	mov	$1,%rcx\n"
-    "	cmp	%rax,%rdx\n"
-    "	cmove	%rcx,%rax\n"
-    "	jmp	*0x38(%rdi)\n"
-    );
-}
-
-/**
- * Initialize POSIX-UEFI and call the application's main() function
- */
-efi_status_t uefi_init (
-#ifndef __clang__
-    uintptr_t ldbase, Elf64_Dyn *dyn, efi_system_table_t *systab, efi_handle_t image
-#else
-    efi_handle_t image, efi_system_table_t *systab
-#endif
-) {
-    efi_guid_t shpGuid = EFI_SHELL_PARAMETERS_PROTOCOL_GUID;
-    efi_shell_parameters_protocol_t *shp = NULL;
-    efi_guid_t shiGuid = SHELL_INTERFACE_PROTOCOL_GUID;
-    efi_shell_interface_protocol_t *shi = NULL;
-    efi_guid_t lipGuid = EFI_LOADED_IMAGE_PROTOCOL_GUID;
-    efi_status_t status;
-    int argc = 0, i, ret;
-    wchar_t **argv = NULL;
-#ifndef UEFI_NO_UTF8
-    int j;
-    char *s;
-#endif
-#ifndef __clang__
-    long relsz = 0, relent = 0;
-    Elf64_Rel *rel = 0;
-    uintptr_t *addr;
-    /* handle relocations */
-    for (i = 0; dyn[i].d_tag != DT_NULL; ++i) {
-        switch (dyn[i].d_tag) {
-            case DT_RELA: rel = (Elf64_Rel*)((unsigned long)dyn[i].d_un.d_ptr + ldbase); break;
-            case DT_RELASZ: relsz = dyn[i].d_un.d_val; break;
-            case DT_RELAENT: relent = dyn[i].d_un.d_val; break;
-            default: break;
-        }
-    }
-    if (rel && relent) {
-        while (relsz > 0) {
-            if(ELF64_R_TYPE (rel->r_info) == R_X86_64_RELATIVE)
-                { addr = (unsigned long *)(ldbase + rel->r_offset); *addr += ldbase; }
-            rel = (Elf64_Rel*) ((char *) rel + relent);
-            relsz -= relent;
-        }
-    }
-#else
-    (void)i;
-#endif
-    /* make sure SSE is enabled, because some say there are buggy firmware in the wild not doing that */
-    __asm__ __volatile__ (
-    "	movq %cr0, %rax\n"
-    "	andb $0xF1, %al\n"
-    "	movq %rax, %cr0\n"
-    "	movq %cr4, %rax\n"
-    "	orw $3 << 9, %ax\n"
-    "	mov %rax, %cr4\n"
-    );
-    /* failsafes, should never happen */
-    if(!image || !systab || !systab->BootServices || !systab->BootServices->HandleProtocol ||
-        !systab->BootServices->OpenProtocol || !systab->BootServices->AllocatePool || !systab->BootServices->FreePool)
-            return EFI_UNSUPPORTED;
-    /* save EFI pointers and loaded image into globals */
-    IM = image;
-    ST = systab;
-    BS = systab->BootServices;
-    RT = systab->RuntimeServices;
-    BS->HandleProtocol(image, &lipGuid, (void **)&LIP);
-    /* get command line arguments */
-    status = BS->OpenProtocol(image, &shpGuid, (void **)&shp, image, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
-    if(!EFI_ERROR(status) && shp) { argc = (int)shp->Argc; argv = shp->Argv; }
-    else {
-        /* if shell 2.0 failed, fallback to shell 1.0 interface */
-        status = BS->OpenProtocol(image, &shiGuid, (void **)&shi, image, NULL, EFI_OPEN_PROTOCOL_GET_PROTOCOL);
-        if(!EFI_ERROR(status) && shi) { argc = (int)shi->Argc; argv = shi->Argv; }
-    }
-    /* call main */
-#ifndef UEFI_NO_UTF8
-    if(argc && argv) {
-        ret = (argc + 1) * ((int)sizeof(uintptr_t) + 1);
-        for(i = 0; i < argc; i++)
-            for(j = 0; argv[i] && argv[i][j]; j++)
-                ret += argv[i][j] < 0x80 ? 1 : (argv[i][j] < 0x800 ? 2 : 3);
-        status = BS->AllocatePool(LIP ? LIP->ImageDataType : EfiLoaderData, (uintn_t)ret, (void **)&__argvutf8);
-        if(EFI_ERROR(status) || !__argvutf8) { argc = 0; __argvutf8 = NULL; }
-        else {
-            s = __argvutf8 + argc * (int)sizeof(uintptr_t);
-            *((uintptr_t*)s) = (uintptr_t)0; s += sizeof(uintptr_t);
-            for(i = 0; i < argc; i++) {
-                *((uintptr_t*)(__argvutf8 + i * (int)sizeof(uintptr_t))) = (uintptr_t)s;
-                for(j = 0; argv[i] && argv[i][j]; j++) {
-                    if(argv[i][j]<0x80) { *s++ = argv[i][j]; } else
-                    if(argv[i][j]<0x800) { *s++ = ((argv[i][j]>>6)&0x1F)|0xC0; *s++ = (argv[i][j]&0x3F)|0x80; } else
-                    { *s++ = ((argv[i][j]>>12)&0x0F)|0xE0; *s++ = ((argv[i][j]>>6)&0x3F)|0x80; *s++ = (argv[i][j]&0x3F)|0x80; }
-                }
-                *s++ = 0;
-            }
-        }
-    }
-    ret = main(argc, (char**)__argvutf8);
-    if(__argvutf8) BS->FreePool(__argvutf8);
-#else
-    ret = main(argc, argv);
-#endif
-    return ret ? EFIERR(ret) : EFI_SUCCESS;
-}

Bootloader/Source/uefi/dirent.c

@@ -1,76 +0,0 @@
-/*
- * dirent.c
- *
- * Copyright (C) 2021 bzt (bztsrc@gitlab)
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * This file is part of the POSIX-UEFI package.
- * @brief Implementing functions which are defined in dirent.h
- *
- */
-
-#include <uefi.h>
-
-extern void __stdio_seterrno(efi_status_t status);
-static struct dirent __dirent;
-
-DIR *opendir (const char_t *__name)
-{
-    DIR *dp = (DIR*)fopen(__name, CL("rd"));
-    if(dp) rewinddir(dp);
-    return dp;
-}
-
-struct dirent *readdir (DIR *__dirp)
-{
-    efi_status_t status;
-    efi_file_info_t info;
-    uintn_t bs = sizeof(efi_file_info_t);
-    memset(&__dirent, 0, sizeof(struct dirent));
-    status = __dirp->Read(__dirp, &bs, &info);
-    if(EFI_ERROR(status) || !bs) {
-        if(EFI_ERROR(status)) __stdio_seterrno(status);
-        else errno = 0;
-        return NULL;
-    }
-    __dirent.d_type = info.Attribute & EFI_FILE_DIRECTORY ? DT_DIR : DT_REG;
-#ifndef UEFI_NO_UTF8
-    __dirent.d_reclen = (unsigned short int)wcstombs(__dirent.d_name, info.FileName, FILENAME_MAX - 1);
-#else
-    __dirent.d_reclen = strlen(info.FileName);
-    strncpy(__dirent.d_name, info.FileName, FILENAME_MAX - 1);
-#endif
-    return &__dirent;
-}
-
-void rewinddir (DIR *__dirp)
-{
-    if(__dirp)
-        __dirp->SetPosition(__dirp, 0);
-}
-
-int closedir (DIR *__dirp)
-{
-    return fclose((FILE*)__dirp);
-}
-
-

Bootloader/Source/uefi/elf_aarch64_efi.lds

@@ -1,63 +0,0 @@
-OUTPUT_FORMAT("elf64-littleaarch64", "elf64-littleaarch64", "elf64-littleaarch64")
-OUTPUT_ARCH(aarch64)
-ENTRY(_start)
-SECTIONS
-{
-  .text 0x0 : {
-    _text = .;
-    *(.text.head)
-    *(.text)
-    *(.text.*)
-    *(.gnu.linkonce.t.*)
-    *(.srodata)
-    *(.rodata*)
-    . = ALIGN(16);
-  }
-  _etext = .;
-  _text_size = . - _text;
-  .dynamic  : { *(.dynamic) }
-  .data : ALIGN(4096)
-  {
-   _data = .;
-   *(.sdata)
-   *(.data)
-   *(.data1)
-   *(.data.*)
-   *(.got.plt)
-   *(.got)
-
-   /* the EFI loader doesn't seem to like a .bss section, so we stick
-      it all into .data: */
-   . = ALIGN(16);
-   _bss = .;
-   *(.sbss)
-   *(.scommon)
-   *(.dynbss)
-   *(.bss)
-   *(COMMON)
-   . = ALIGN(16);
-   _bss_end = .;
-  }
-
-  .rela.dyn : { *(.rela.dyn) }
-  .rela.plt : { *(.rela.plt) }
-  .rela.got : { *(.rela.got) }
-  .rela.data : { *(.rela.data) *(.rela.data*) }
-  . = ALIGN(512);
-  _edata = .;
-  _data_size = . - _data;
-
-  . = ALIGN(4096);
-  .dynsym   : { *(.dynsym) }
-  . = ALIGN(4096);
-  .dynstr   : { *(.dynstr) }
-  . = ALIGN(4096);
-  .note.gnu.build-id : { *(.note.gnu.build-id) }
-  /DISCARD/ :
-  {
-    *(.rel.reloc)
-    *(.eh_frame)
-    *(.note.GNU-stack)
-  }
-  .comment 0 : { *(.comment) }
-}

Bootloader/Source/uefi/elf_riscv64_efi.lds

@@ -1,64 +0,0 @@
-OUTPUT_FORMAT("elf64-littleriscv", "elf64-littleriscv", "elf64-littleriscv")
-OUTPUT_ARCH(riscv)
-ENTRY(_start)
-SECTIONS
-{
-  .text 0x0 : {
-    _text = .;
-    *(.text.head)
-    *(.text)
-    *(.text.*)
-    *(.gnu.linkonce.t.*)
-    *(.srodata)
-    *(.rodata*)
-    . = ALIGN(16);
-  }
-  _etext = .;
-  _text_size = . - _text;
-  .dynamic  : { *(.dynamic) }
-  .data : ALIGN(4096)
-  {
-   _data = .;
-   *(.sdata)
-   *(.data)
-   *(.data1)
-   *(.data.*)
-   *(.got.plt)
-   *(.got)
-
-   /* the EFI loader doesn't seem to like a .bss section, so we stick
-      it all into .data: */
-   . = ALIGN(16);
-   _bss = .;
-   *(.sbss)
-   *(.scommon)
-   *(.dynbss)
-   *(.bss)
-   *(COMMON)
-   . = ALIGN(16);
-   _bss_end = .;
-  }
-
-  .rela.text : { *(.rela.text) *(.rela.text*) }
-  .rela.dyn : { *(.rela.dyn) }
-  .rela.plt : { *(.rela.plt) }
-  .rela.got : { *(.rela.got) }
-  .rela.data : { *(.rela.data) *(.rela.data*) }
-  . = ALIGN(512);
-  _edata = .;
-  _data_size = . - _data;
-
-  . = ALIGN(4096);
-  .dynsym   : { *(.dynsym) }
-  . = ALIGN(4096);
-  .dynstr   : { *(.dynstr) }
-  . = ALIGN(4096);
-  .note.gnu.build-id : { *(.note.gnu.build-id) }
-  /DISCARD/ :
-  {
-    *(.rel.reloc)
-    *(.eh_frame)
-    *(.note.GNU-stack)
-  }
-  .comment 0 : { *(.comment) }
-}

Bootloader/Source/uefi/elf_x86_64_efi.lds

@@ -1,76 +0,0 @@
-/* Same as elf_x86_64_fbsd_efi.lds, except for OUTPUT_FORMAT below - KEEP IN SYNC */
-OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64")
-OUTPUT_ARCH(i386:x86-64)
-ENTRY(_start)
-SECTIONS
-{
-  . = 0;
-  ImageBase = .;
-  /* .hash and/or .gnu.hash MUST come first! */
-  .hash : { *(.hash) }
-  .gnu.hash : { *(.gnu.hash) }
-  . = ALIGN(4096);
-  .eh_frame : 
-  { 
-    *(.eh_frame)
-  }
-  . = ALIGN(4096);
-  .text :
-  {
-   _text = .;
-   *(.text)
-   *(.text.*)
-   *(.gnu.linkonce.t.*)
-   . = ALIGN(16);
-  }
-  _etext = .;
-  _text_size = . - _text;
-  . = ALIGN(4096);
-  .reloc :
-  {
-   *(.reloc)
-  }
-  . = ALIGN(4096);
-  .data :
-  {
-   _data = .;
-   *(.rodata*)
-   *(.got.plt)
-   *(.got)
-   *(.data*)
-   *(.sdata)
-   /* the EFI loader doesn't seem to like a .bss section, so we stick
-      it all into .data: */
-   *(.sbss)
-   *(.scommon)
-   *(.dynbss)
-   *(.bss)
-   *(COMMON)
-   *(.rel.local)
-  }
-  .note.gnu.build-id : { *(.note.gnu.build-id) }
-
-  _edata = .;
-  _data_size = . - _etext;
-  . = ALIGN(4096);
-  .dynamic  : { *(.dynamic) }
-  . = ALIGN(4096);
-  .rela :
-  {
-    *(.rela.data*)
-    *(.rela.got)
-    *(.rela.stab)
-  }
-  . = ALIGN(4096);
-  .dynsym   : { *(.dynsym) }
-  . = ALIGN(4096);
-  .dynstr   : { *(.dynstr) }
-  . = ALIGN(4096);
-  .ignored.reloc :
-  {
-    *(.rela.reloc)
-    *(.eh_frame)
-    *(.note.GNU-stack)
-  }
-  .comment 0 : { *(.comment) }
-}

Bootloader/Source/uefi/qsort.c

@@ -1,154 +0,0 @@
-/*
- * qsort.c
- *
- * @brief from OpenBSD
- */
-
-/*	$OpenBSD: qsort.c,v 1.10 2005/08/08 08:05:37 espie Exp $ */
-/*-
- * Copyright (c) 1992, 1993
- *	The Regents of the University of California.  All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-#include <uefi.h>
-
-static __inline char	*med3(char *, char *, char *, __compar_fn_t cmp);
-static __inline void	 swapfunc(char *, char *, int, int);
-/*
- * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function".
- */
-#define swapcode(TYPE, parmi, parmj, n) { 		\
-	long i = (n) / sizeof (TYPE); 			\
-	TYPE *pi = (TYPE *) (parmi); 			\
-	TYPE *pj = (TYPE *) (parmj); 			\
-	do { 						\
-		TYPE	t = *pi;			\
-		*pi++ = *pj;				\
-		*pj++ = t;				\
-        } while (--i > 0);				\
-}
-#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \
-	es % sizeof(long) ? 2 : es == sizeof(long)? 0 : 1;
-static __inline void
-swapfunc(char *a, char *b, int n, int swaptype)
-{
-	if (swaptype <= 1)
-		swapcode(long, a, b, n)
-	else
-		swapcode(char, a, b, n)
-}
-#define swap(a, b)					\
-	if (swaptype == 0) {				\
-		long t = *(long *)(a);			\
-		*(long *)(a) = *(long *)(b);		\
-		*(long *)(b) = t;			\
-	} else						\
-		swapfunc(a, b, es, swaptype)
-#define vecswap(a, b, n) 	if ((n) > 0) swapfunc(a, b, n, swaptype)
-static __inline char *
-med3(char *a, char *b, char *c, __compar_fn_t cmp)
-{
-	return cmp(a, b) < 0 ?
-	       (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a ))
-              :(cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c ));
-}
-
-void qsort(void *aa, size_t n, size_t es, __compar_fn_t cmp)
-{
-	char *pa, *pb, *pc, *pd, *pl, *pm, *pn;
-	int d, r, swaptype, swap_cnt;
-	char *a = aa;
-loop:	SWAPINIT(a, es);
-	swap_cnt = 0;
-	if (n < 7) {
-		for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es)
-			for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
-			     pl -= es)
-				swap(pl, pl - es);
-		return;
-	}
-	pm = (char *)a + (n / 2) * es;
-	if (n > 7) {
-		pl = (char *)a;
-		pn = (char *)a + (n - 1) * es;
-		if (n > 40) {
-			d = (n / 8) * es;
-			pl = med3(pl, pl + d, pl + 2 * d, cmp);
-			pm = med3(pm - d, pm, pm + d, cmp);
-			pn = med3(pn - 2 * d, pn - d, pn, cmp);
-		}
-		pm = med3(pl, pm, pn, cmp);
-	}
-	swap(a, pm);
-	pa = pb = (char *)a + es;
-
-	pc = pd = (char *)a + (n - 1) * es;
-	for (;;) {
-		while (pb <= pc && (r = cmp(pb, a)) <= 0) {
-			if (r == 0) {
-				swap_cnt = 1;
-				swap(pa, pb);
-				pa += es;
-      }
-			pb += es;
-		}
-		while (pb <= pc && (r = cmp(pc, a)) >= 0) {
-			if (r == 0) {
-				swap_cnt = 1;
-				swap(pc, pd);
-				pd -= es;
-			}
-			pc -= es;
-		}
-		if (pb > pc)
-			break;
-		swap(pb, pc);
-		swap_cnt = 1;
-		pb += es;
-		pc -= es;
-	}
-	if (swap_cnt == 0) {  /* Switch to insertion sort */
-		for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es)
-			for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0;
-			     pl -= es)
-				swap(pl, pl - es);
-		return;
-    }
-	pn = (char *)a + n * es;
-	r = min(pa - (char *)a, pb - pa);
-	vecswap(a, pb - r, r);
-	r = min(pd - pc, pn - pd - (int)es);
-	vecswap(pb, pn - r, r);
-	if ((r = pb - pa) > (int)es)
-		qsort(a, r / es, es, cmp);
-	if ((r = pd - pc) > (int)es) {
-		/* Iterate rather than recurse to save stack space */
-		a = pn - r;
-		n = r / es;
-		goto loop;
-	}
-/*		qsort(pn - r, r / es, es, cmp);*/
-}

Bootloader/Source/uefi/stat.c

@@ -1,68 +0,0 @@
-/*
- * stat.c
- *
- * Copyright (C) 2021 bzt (bztsrc@gitlab)
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * This file is part of the POSIX-UEFI package.
- * @brief Implementing functions which are defined in sys/stat.h
- *
- */
-
-#include <uefi.h>
-
-/* fstat is in stdio.c because we can't access static variables otherwise... */
-
-int stat (const char_t *__file, struct stat *__buf)
-{
-    int ret;
-    FILE *f;
-
-    if(!__file || !*__file || !__buf) {
-        errno = EINVAL;
-        return -1;
-    }
-    f = fopen(__file, CL("*"));
-    if(!f) {
-        memset(__buf, 0, sizeof(struct stat));
-        return -1;
-    }
-    ret = fstat(f, __buf);
-    fclose(f);
-    return ret;
-}
-
-extern int mkdir (const char_t *__path, mode_t __mode)
-{
-    FILE *f;
-    (void)__mode;
-    if(!__path || !*__path) {
-        errno = EINVAL;
-        return -1;
-    }
-    f = fopen(__path, CL("wd"));
-    if(!f) {
-        return -1;
-    }
-    fclose(f);
-    return 0;
-}

Bootloader/Source/uefi/stdio.c

@@ -1,817 +0,0 @@
-/*
- * stdio.c
- *
- * Copyright (C) 2021 bzt (bztsrc@gitlab)
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * This file is part of the POSIX-UEFI package.
- * @brief Implementing functions which are defined in stdio.h
- *
- */
-
-#include <uefi.h>
-
-static efi_file_handle_t *__root_dir = NULL;
-static efi_serial_io_protocol_t *__ser = NULL;
-static block_file_t *__blk_devs = NULL;
-static uintn_t __blk_ndevs = 0;
-extern time_t __mktime_efi(efi_time_t *t);
-void __stdio_cleanup(void);
-void __stdio_seterrno(efi_status_t status);
-int __remove (const char_t *__filename, int isdir);
-
-void __stdio_cleanup(void)
-{
-#ifndef UEFI_NO_UTF8
-    if(__argvutf8)
-        BS->FreePool(__argvutf8);
-#endif
-    if(__blk_devs) {
-        free(__blk_devs);
-        __blk_devs = NULL;
-        __blk_ndevs = 0;
-    }
-}
-
-void __stdio_seterrno(efi_status_t status)
-{
-    switch((int)(status & 0xffff)) {
-        case EFI_WRITE_PROTECTED & 0xffff: errno = EROFS; break;
-        case EFI_ACCESS_DENIED & 0xffff: errno = EACCES; break;
-        case EFI_VOLUME_FULL & 0xffff: errno = ENOSPC; break;
-        case EFI_NOT_FOUND & 0xffff: errno = ENOENT; break;
-        case EFI_INVALID_PARAMETER & 0xffff: errno = EINVAL; break;
-        default: errno = EIO; break;
-    }
-}
-
-int fstat (FILE *__f, struct stat *__buf)
-{
-    efi_guid_t infGuid = EFI_FILE_INFO_GUID;
-    efi_file_info_t info;
-    uintn_t fsiz = (uintn_t)sizeof(efi_file_info_t);
-    efi_status_t status;
-    uintn_t i;
-
-    if(!__f || !__buf) {
-        errno = EINVAL;
-        return -1;
-    }
-    memset(__buf, 0, sizeof(struct stat));
-    if(__f == stdin) {
-        __buf->st_mode = S_IREAD | S_IFIFO;
-        return 0;
-    }
-    if(__f == stdout || __f == stderr) {
-        __buf->st_mode = S_IWRITE | S_IFIFO;
-        return 0;
-    }
-    if(__ser && __f == (FILE*)__ser) {
-        __buf->st_mode = S_IREAD | S_IWRITE | S_IFCHR;
-        return 0;
-    }
-    for(i = 0; i < __blk_ndevs; i++)
-        if(__f == (FILE*)__blk_devs[i].bio) {
-            __buf->st_mode = S_IREAD | S_IWRITE | S_IFBLK;
-            __buf->st_size = (off_t)__blk_devs[i].bio->Media->BlockSize * ((off_t)__blk_devs[i].bio->Media->LastBlock + 1);
-            __buf->st_blocks = __blk_devs[i].bio->Media->LastBlock + 1;
-            return 0;
-        }
-    status = __f->GetInfo(__f, &infGuid, &fsiz, &info);
-    if(EFI_ERROR(status)) {
-        __stdio_seterrno(status);
-        return -1;
-    }
-    __buf->st_mode = S_IREAD |
-        (info.Attribute & EFI_FILE_READ_ONLY ? 0 : S_IWRITE) |
-        (info.Attribute & EFI_FILE_DIRECTORY ? S_IFDIR : S_IFREG);
-    __buf->st_size = (off_t)info.FileSize;
-    __buf->st_blocks = (blkcnt_t)info.PhysicalSize;
-    __buf->st_atime = __mktime_efi(&info.LastAccessTime);
-    __buf->st_mtime = __mktime_efi(&info.ModificationTime);
-    __buf->st_ctime = __mktime_efi(&info.CreateTime);
-    return 0;
-}
-
-int fclose (FILE *__stream)
-{
-    efi_status_t status = EFI_SUCCESS;
-    uintn_t i;
-    if(!__stream) {
-        errno = EINVAL;
-        return 0;
-    }
-    if(__stream == stdin || __stream == stdout || __stream == stderr || (__ser && __stream == (FILE*)__ser)) {
-        return 1;
-    }
-    for(i = 0; i < __blk_ndevs; i++)
-        if(__stream == (FILE*)__blk_devs[i].bio)
-            return 1;
-    status = __stream->Close(__stream);
-    free(__stream);
-    return !EFI_ERROR(status);
-}
-
-int fflush (FILE *__stream)
-{
-    efi_status_t status = EFI_SUCCESS;
-    uintn_t i;
-    if(!__stream) {
-        errno = EINVAL;
-        return 0;
-    }
-    if(__stream == stdin || __stream == stdout || __stream == stderr || (__ser && __stream == (FILE*)__ser)) {
-        return 1;
-    }
-    for(i = 0; i < __blk_ndevs; i++)
-        if(__stream == (FILE*)__blk_devs[i].bio) {
-            return 1;
-        }
-    status = __stream->Flush(__stream);
-    return !EFI_ERROR(status);
-}
-
-int __remove (const char_t *__filename, int isdir)
-{
-    efi_status_t status;
-    efi_guid_t infGuid = EFI_FILE_INFO_GUID;
-    efi_file_info_t info;
-    uintn_t fsiz = (uintn_t)sizeof(efi_file_info_t), i;
-    /* little hack to support read and write mode for Delete() and stat() without create mode or checks */
-    FILE *f = fopen(__filename, CL("*"));
-    if(errno)
-        return 1;
-    if(!f || f == stdin || f == stdout || f == stderr || (__ser && f == (FILE*)__ser)) {
-        errno = EBADF;
-        return 1;
-    }
-    for(i = 0; i < __blk_ndevs; i++)
-        if(f == (FILE*)__blk_devs[i].bio) {
-            errno = EBADF;
-            return 1;
-        }
-    if(isdir != -1) {
-        status = f->GetInfo(f, &infGuid, &fsiz, &info);
-        if(EFI_ERROR(status)) goto err;
-        if(isdir == 0 && (info.Attribute & EFI_FILE_DIRECTORY)) {
-            fclose(f); errno = EISDIR;
-            return -1;
-        }
-        if(isdir == 1 && !(info.Attribute & EFI_FILE_DIRECTORY)) {
-            fclose(f); errno = ENOTDIR;
-            return -1;
-        }
-    }
-    status = f->Delete(f);
-    if(EFI_ERROR(status)) {
-err:    __stdio_seterrno(status);
-        fclose(f);
-        return -1;
-    }
-    /* no need for fclose(f); */
-    free(f);
-    return 0;
-}
-
-int remove (const char_t *__filename)
-{
-    return __remove(__filename, -1);
-}
-
-FILE *fopen (const char_t *__filename, const char_t *__modes)
-{
-    FILE *ret;
-    efi_status_t status;
-    efi_guid_t sfsGuid = EFI_SIMPLE_FILE_SYSTEM_PROTOCOL_GUID;
-    efi_simple_file_system_protocol_t *sfs = NULL;
-    efi_guid_t infGuid = EFI_FILE_INFO_GUID;
-    efi_file_info_t info;
-    uintn_t fsiz = (uintn_t)sizeof(efi_file_info_t), par, i;
-#ifndef UEFI_NO_UTF8
-    wchar_t wcname[BUFSIZ];
-#endif
-    errno = 0;
-    if(!__filename || !*__filename || !__modes || (__modes[0] != CL('r') && __modes[0] != CL('w') && __modes[0] != CL('a') &&
-      __modes[0] != CL('*')) || (__modes[1] != 0 && __modes[1] != CL('d') && __modes[1] != CL('+'))) {
-        errno = EINVAL;
-        return NULL;
-    }
-    /* fake some device names. UEFI has no concept of device files */
-    if(!strcmp(__filename, CL("/dev/stdin"))) {
-        if(__modes[0] == CL('w') || __modes[0] == CL('a')) { errno = EPERM; return NULL; }
-        return stdin;
-    }
-    if(!strcmp(__filename, CL("/dev/stdout"))) {
-        if(__modes[0] == CL('r')) { errno = EPERM; return NULL; }
-        return stdout;
-    }
-    if(!strcmp(__filename, CL("/dev/stderr"))) {
-        if(__modes[0] == CL('r')) { errno = EPERM; return NULL; }
-        return stderr;
-    }
-    if(!memcmp(__filename, CL("/dev/serial"), 11 * sizeof(char_t))) {
-        par = (uintn_t)atol(__filename + 11);
-        if(!__ser) {
-            efi_guid_t serGuid = EFI_SERIAL_IO_PROTOCOL_GUID;
-            status = BS->LocateProtocol(&serGuid, NULL, (void**)&__ser);
-            if(EFI_ERROR(status) || !__ser) { errno = ENOENT; return NULL; }
-        }
-        __ser->SetAttributes(__ser, par > 9600 ? par : 115200, 0, 1000, NoParity, 8, OneStopBit);
-        return (FILE*)__ser;
-    }
-    if(!memcmp(__filename, CL("/dev/disk"), 9 * sizeof(char_t))) {
-        par = (uintn_t)atol(__filename + 9);
-        if(!__blk_ndevs) {
-            efi_guid_t bioGuid = EFI_BLOCK_IO_PROTOCOL_GUID;
-            efi_handle_t handles[128];
-            uintn_t handle_size = sizeof(handles);
-            status = BS->LocateHandle(ByProtocol, &bioGuid, NULL, &handle_size, (efi_handle_t*)&handles);
-            if(!EFI_ERROR(status)) {
-                handle_size /= (uintn_t)sizeof(efi_handle_t);
-                /* workaround a bug in TianoCore, it reports zero size even though the data is in the buffer */
-                if(handle_size < 1)
-                    handle_size = (uintn_t)sizeof(handles) / sizeof(efi_handle_t);
-                __blk_devs = (block_file_t*)malloc(handle_size * sizeof(block_file_t));
-                if(__blk_devs) {
-                    memset(__blk_devs, 0, handle_size * sizeof(block_file_t));
-                    for(i = __blk_ndevs = 0; i < handle_size; i++)
-                        if(handles[i] && !EFI_ERROR(BS->HandleProtocol(handles[i], &bioGuid, (void **) &__blk_devs[__blk_ndevs].bio)) &&
-                            __blk_devs[__blk_ndevs].bio && __blk_devs[__blk_ndevs].bio->Media &&
-                            __blk_devs[__blk_ndevs].bio->Media->BlockSize > 0)
-                                __blk_ndevs++;
-                } else
-                    __blk_ndevs = 0;
-            }
-        }
-        if(__blk_ndevs && par < __blk_ndevs)
-            return (FILE*)__blk_devs[par].bio;
-        errno = ENOENT;
-        return NULL;
-    }
-    if(!__root_dir && LIP) {
-        status = BS->HandleProtocol(LIP->DeviceHandle, &sfsGuid, (void **)&sfs);
-        if(!EFI_ERROR(status))
-            status = sfs->OpenVolume(sfs, &__root_dir);
-    }
-    if(!__root_dir) {
-        errno = ENODEV;
-        return NULL;
-    }
-    ret = (FILE*)malloc(sizeof(FILE));
-    if(!ret) return NULL;
-    /* normally write means read,write,create. But for remove (internal '*' mode), we need read,write without create
-     * also mode 'w' in POSIX means write-only (without read), but that's not working on certain firmware, we must
-     * pass read too. This poses a problem of truncating a write-only file, see issue #26, we have to do that manually */
-#ifndef UEFI_NO_UTF8
-    mbstowcs((wchar_t*)&wcname, __filename, BUFSIZ - 1);
-    status = __root_dir->Open(__root_dir, &ret, (wchar_t*)&wcname,
-#else
-    status = __root_dir->Open(__root_dir, &ret, (wchar_t*)__filename,
-#endif
-        __modes[0] == CL('w') || __modes[0] == CL('a') ? (EFI_FILE_MODE_WRITE | EFI_FILE_MODE_READ | EFI_FILE_MODE_CREATE) :
-            EFI_FILE_MODE_READ | (__modes[0] == CL('*') || __modes[1] == CL('+') ? EFI_FILE_MODE_WRITE : 0),
-        __modes[1] == CL('d') ? EFI_FILE_DIRECTORY : 0);
-    if(EFI_ERROR(status)) {
-err:    __stdio_seterrno(status);
-        free(ret); return NULL;
-    }
-    if(__modes[0] == CL('*')) return ret;
-    status = ret->GetInfo(ret, &infGuid, &fsiz, &info);
-    if(EFI_ERROR(status)) goto err;
-    if(__modes[1] == CL('d') && !(info.Attribute & EFI_FILE_DIRECTORY)) {
-        ret->Close(ret); free(ret); errno = ENOTDIR; return NULL;
-    }
-    if(__modes[1] != CL('d') && (info.Attribute & EFI_FILE_DIRECTORY)) {
-        ret->Close(ret); free(ret); errno = EISDIR; return NULL;
-    }
-    if(__modes[0] == CL('a')) fseek(ret, 0, SEEK_END);
-    if(__modes[0] == CL('w')) {
-        /* manually truncate file size
-         * See https://github.com/tianocore/edk2/blob/master/MdePkg/Library/UefiFileHandleLib/UefiFileHandleLib.c
-         * function FileHandleSetSize */
-        info.FileSize = 0;
-        ret->SetInfo(ret, &infGuid, fsiz, &info);
-    }
-    return ret;
-}
-
-size_t fread (void *__ptr, size_t __size, size_t __n, FILE *__stream)
-{
-    uintn_t bs = __size * __n, i, n;
-    efi_status_t status;
-    if(!__ptr || __size < 1 || __n < 1 || !__stream) {
-        errno = EINVAL;
-        return 0;
-    }
-    if(__stream == stdin || __stream == stdout || __stream == stderr) {
-        errno = ESPIPE;
-        return 0;
-    }
-    if(__ser && __stream == (FILE*)__ser) {
-        status = __ser->Read(__ser, &bs, __ptr);
-    } else {
-        for(i = 0; i < __blk_ndevs; i++)
-            if(__stream == (FILE*)__blk_devs[i].bio) {
-                n = __blk_devs[i].offset / __blk_devs[i].bio->Media->BlockSize;
-                bs = (bs / __blk_devs[i].bio->Media->BlockSize) * __blk_devs[i].bio->Media->BlockSize;
-                status = __blk_devs[i].bio->ReadBlocks(__blk_devs[i].bio, __blk_devs[i].bio->Media->MediaId, n, bs, __ptr);
-                if(EFI_ERROR(status)) {
-                    __stdio_seterrno(status);
-                    return 0;
-                }
-                __blk_devs[i].offset += bs;
-                return bs / __size;
-            }
-        status = __stream->Read(__stream, &bs, __ptr);
-    }
-    if(EFI_ERROR(status)) {
-        __stdio_seterrno(status);
-        return 0;
-    }
-    return bs / __size;
-}
-
-size_t fwrite (const void *__ptr, size_t __size, size_t __n, FILE *__stream)
-{
-    uintn_t bs = __size * __n, n, i;
-    efi_status_t status;
-    if(!__ptr || __size < 1 || __n < 1 || !__stream) {
-        errno = EINVAL;
-        return 0;
-    }
-    if(__stream == stdin || __stream == stdout || __stream == stderr) {
-        errno = ESPIPE;
-        return 0;
-    }
-    if(__ser && __stream == (FILE*)__ser) {
-        status = __ser->Write(__ser, &bs, (void*)__ptr);
-    } else {
-        for(i = 0; i < __blk_ndevs; i++)
-            if(__stream == (FILE*)__blk_devs[i].bio) {
-                n = __blk_devs[i].offset / __blk_devs[i].bio->Media->BlockSize;
-                bs = (bs / __blk_devs[i].bio->Media->BlockSize) * __blk_devs[i].bio->Media->BlockSize;
-                status = __blk_devs[i].bio->WriteBlocks(__blk_devs[i].bio, __blk_devs[i].bio->Media->MediaId, n, bs, (void*)__ptr);
-                if(EFI_ERROR(status)) {
-                    __stdio_seterrno(status);
-                    return 0;
-                }
-                __blk_devs[i].offset += bs;
-                return bs / __size;
-            }
-        status = __stream->Write(__stream, &bs, (void *)__ptr);
-    }
-    if(EFI_ERROR(status)) {
-        __stdio_seterrno(status);
-        return 0;
-    }
-    return bs / __size;
-}
-
-int fseek (FILE *__stream, long int __off, int __whence)
-{
-    off_t off = 0;
-    efi_status_t status;
-    efi_guid_t infoGuid = EFI_FILE_INFO_GUID;
-    efi_file_info_t info;
-    uintn_t fsiz = sizeof(efi_file_info_t), i;
-    if(!__stream || (__whence != SEEK_SET && __whence != SEEK_CUR && __whence != SEEK_END)) {
-        errno = EINVAL;
-        return -1;
-    }
-    if(__stream == stdin || __stream == stdout || __stream == stderr) {
-        errno = ESPIPE;
-        return -1;
-    }
-    if(__ser && __stream == (FILE*)__ser) {
-        errno = EBADF;
-        return -1;
-    }
-    for(i = 0; i < __blk_ndevs; i++)
-        if(__stream == (FILE*)__blk_devs[i].bio) {
-            off = (uint64_t)__blk_devs[i].bio->Media->BlockSize * (uint64_t)__blk_devs[i].bio->Media->LastBlock;
-            switch(__whence) {
-                case SEEK_END:
-                    __blk_devs[i].offset = off + __off;
-                    break;
-                case SEEK_CUR:
-                    __blk_devs[i].offset += __off;
-                    break;
-                case SEEK_SET:
-                    __blk_devs[i].offset = __off;
-                    break;
-            }
-            if(__blk_devs[i].offset < 0) __blk_devs[i].offset = 0;
-            if(__blk_devs[i].offset > off) __blk_devs[i].offset = off;
-            __blk_devs[i].offset = (__blk_devs[i].offset / __blk_devs[i].bio->Media->BlockSize) *
-                __blk_devs[i].bio->Media->BlockSize;
-            return 0;
-        }
-    switch(__whence) {
-        case SEEK_END:
-            status = __stream->GetInfo(__stream, &infoGuid, &fsiz, &info);
-            if(!EFI_ERROR(status)) {
-                off = info.FileSize + __off;
-                status = __stream->SetPosition(__stream, off);
-            }
-            break;
-        case SEEK_CUR:
-            status = __stream->GetPosition(__stream, &off);
-            if(!EFI_ERROR(status)) {
-                off += __off;
-                status = __stream->SetPosition(__stream, off);
-            }
-            break;
-        default:
-            status = __stream->SetPosition(__stream, __off);
-            break;
-    }
-    return EFI_ERROR(status) ? -1 : 0;
-}
-
-long int ftell (FILE *__stream)
-{
-    uint64_t off = 0;
-    uintn_t i;
-    efi_status_t status;
-    if(!__stream) {
-        errno = EINVAL;
-        return -1;
-    }
-    if(__stream == stdin || __stream == stdout || __stream == stderr) {
-        errno = ESPIPE;
-        return -1;
-    }
-    if(__ser && __stream == (FILE*)__ser) {
-        errno = EBADF;
-        return -1;
-    }
-    for(i = 0; i < __blk_ndevs; i++)
-        if(__stream == (FILE*)__blk_devs[i].bio) {
-            return (long int)__blk_devs[i].offset;
-        }
-    status = __stream->GetPosition(__stream, &off);
-    return EFI_ERROR(status) ? -1 : (long int)off;
-}
-
-int feof (FILE *__stream)
-{
-    uint64_t off = 0;
-    efi_guid_t infGuid = EFI_FILE_INFO_GUID;
-    efi_file_info_t info;
-    uintn_t fsiz = (uintn_t)sizeof(efi_file_info_t), i;
-    efi_status_t status;
-    if(!__stream) {
-        errno = EINVAL;
-        return 0;
-    }
-    if(__stream == stdin || __stream == stdout || __stream == stderr) {
-        errno = ESPIPE;
-        return 0;
-    }
-    if(__ser && __stream == (FILE*)__ser) {
-        errno = EBADF;
-        return 0;
-    }
-    for(i = 0; i < __blk_ndevs; i++)
-        if(__stream == (FILE*)__blk_devs[i].bio) {
-            errno = EBADF;
-            return __blk_devs[i].offset == (off_t)__blk_devs[i].bio->Media->BlockSize * (off_t)__blk_devs[i].bio->Media->LastBlock;
-        }
-    status = __stream->GetPosition(__stream, &off);
-    if(EFI_ERROR(status)) {
-err:    __stdio_seterrno(status);
-        return 1;
-    }
-    status = __stream->GetInfo(__stream, &infGuid, &fsiz, &info);
-    if(EFI_ERROR(status)) goto err;
-    __stream->SetPosition(__stream, off);
-    return info.FileSize == off;
-}
-
-int vsnprintf(char_t *dst, size_t maxlen, const char_t *fmt, __builtin_va_list args)
-{
-#define needsescape(a) (a==CL('\"') || a==CL('\\') || a==CL('\a') || a==CL('\b') || a==CL('\033') || a==CL('\f') || \
-    a==CL('\r') || a==CL('\n') || a==CL('\t') || a==CL('\v'))
-    efi_physical_address_t m;
-    uint8_t *mem;
-    uint64_t arg;
-    int64_t iarg;
-    int len, sign, i, j;
-    char_t *p, *orig=dst, *end = dst + maxlen - 1, tmpstr[24], pad, n;
-#ifdef UEFI_NO_UTF8
-    char *c;
-#endif
-    if(dst==NULL || fmt==NULL)
-        return 0;
-
-    arg = 0;
-    while(*fmt && dst < end) {
-        if(*fmt==CL('%')) {
-            fmt++;
-            if(*fmt==CL('%')) goto put;
-            len=0; pad=CL(' ');
-            if(*fmt==CL('0')) pad=CL('0');
-            while(*fmt>=CL('0') && *fmt<=CL('9')) {
-                len *= 10;
-                len += *fmt-CL('0');
-                fmt++;
-            }
-            if(*fmt==CL('l')) fmt++;
-            if(*fmt==CL('c')) {
-                arg = __builtin_va_arg(args, uint32_t);
-#ifndef UEFI_NO_UTF8
-                if(arg<0x80) { *dst++ = arg; } else
-                if(arg<0x800) { *dst++ = ((arg>>6)&0x1F)|0xC0; *dst++ = (arg&0x3F)|0x80; } else
-                { *dst++ = ((arg>>12)&0x0F)|0xE0; *dst++ = ((arg>>6)&0x3F)|0x80; *dst++ = (arg&0x3F)|0x80; }
-#else
-                *dst++ = (wchar_t)(arg & 0xffff);
-#endif
-                fmt++;
-                continue;
-            } else
-            if(*fmt==CL('d') || *fmt==CL('i') || *fmt==CL('u')) {
-                iarg = __builtin_va_arg(args, int64_t);
-                sign=0;
-                if(*fmt!=CL('u') && iarg<0) {
-                    arg=-iarg;
-                    sign++;
-                } else arg=(uint64_t)iarg;
-                i=23;
-                tmpstr[i]=0;
-                do {
-                    tmpstr[--i]=CL('0')+(arg%10);
-                    arg/=10;
-                } while(arg!=0 && i>0);
-                if(sign) {
-                    tmpstr[--i]=CL('-');
-                }
-                if(len>0 && len<23) {
-                    while(i && i>23-len) {
-                        tmpstr[--i]=pad;
-                    }
-                }
-                p=&tmpstr[i];
-                goto copystring;
-            } else
-            if(*fmt==CL('p')) {
-                arg = __builtin_va_arg(args, uint64_t);
-                len = 16; pad = CL('0'); goto hex;
-            } else
-            if(*fmt==CL('x') || *fmt==CL('X')) {
-                arg = __builtin_va_arg(args, uint64_t);
-hex:            i=16;
-                tmpstr[i]=0;
-                do {
-                    n=arg & 0xf;
-                    /* 0-9 => '0'-'9', 10-15 => 'A'-'F' */
-                    tmpstr[--i]=n+(n>9?(*fmt==CL('X')?0x37:0x57):0x30);
-                    arg>>=4;
-                } while(arg!=0 && i>0);
-                /* padding, only leading zeros */
-                if(len>0 && len<=16) {
-                    while(i>16-len) {
-                        tmpstr[--i]=CL('0');
-                    }
-                }
-                p=&tmpstr[i];
-                goto copystring;
-            } else
-            if(*fmt==CL('s') || *fmt==CL('q')) {
-                p = __builtin_va_arg(args, char_t*);
-copystring:     if(p==NULL) {
-                    p=CL("(null)");
-                }
-                while(*p && dst + 2 < end) {
-                    if(*fmt==CL('q') && needsescape(*p)) {
-                        *dst++ = CL('\\');
-                        switch(*p) {
-                            case CL('\a'): *dst++ = CL('a'); break;
-                            case CL('\b'): *dst++ = CL('b'); break;
-                            case 27:       *dst++ = CL('e'); break; /* gcc 10.2 doesn't like CL('\e') in ansi mode */
-                            case CL('\f'): *dst++ = CL('f'); break;
-                            case CL('\n'): *dst++ = CL('n'); break;
-                            case CL('\r'): *dst++ = CL('r'); break;
-                            case CL('\t'): *dst++ = CL('t'); break;
-                            case CL('\v'): *dst++ = CL('v'); break;
-                            default: *dst++ = *p++; break;
-                        }
-                    } else {
-                        if(*p == CL('\n') && (orig == dst || *(dst - 1) != CL('\r'))) *dst++ = CL('\r');
-                        *dst++ = *p++;
-                    }
-                }
-            } else
-#ifdef UEFI_NO_UTF8
-            if(*fmt==L'S' || *fmt==L'Q') {
-                c = __builtin_va_arg(args, char*);
-                if(c==NULL) goto copystring;
-                while(*p && dst + 2 < end) {
-                    arg = *c;
-                    if((*c & 128) != 0) {
-                        if((*c & 32) == 0 ) {
-                            arg = ((*c & 0x1F)<<6)|(*(c+1) & 0x3F);
-                            c += 1;
-                        } else
-                        if((*c & 16) == 0 ) {
-                            arg = ((*c & 0xF)<<12)|((*(c+1) & 0x3F)<<6)|(*(c+2) & 0x3F);
-                            c += 2;
-                        } else
-                        if((*c & 8) == 0 ) {
-                            arg = ((*c & 0x7)<<18)|((*(c+1) & 0x3F)<<12)|((*(c+2) & 0x3F)<<6)|(*(c+3) & 0x3F);
-                            c += 3;
-                        } else
-                            arg = L'?';
-                    }
-                    if(!arg) break;
-                    if(*fmt==L'Q' && needsescape(arg)) {
-                        *dst++ = L'\\';
-                        switch(arg) {
-                            case L'\a': *dst++ = L'a'; break;
-                            case L'\b': *dst++ = L'b'; break;
-                            case 27:    *dst++ = L'e'; break;   /* gcc 10.2 doesn't like L'\e' in ansi mode */
-                            case L'\f': *dst++ = L'f'; break;
-                            case L'\n': *dst++ = L'n'; break;
-                            case L'\r': *dst++ = L'r'; break;
-                            case L'\t': *dst++ = L't'; break;
-                            case L'\v': *dst++ = L'v'; break;
-                            default: *dst++ = arg; break;
-                        }
-                    } else {
-                        if(arg == L'\n') *dst++ = L'\r';
-                        *dst++ = (wchar_t)(arg & 0xffff);
-                    }
-                }
-            } else
-#endif
-            if(*fmt==CL('D')) {
-                m = __builtin_va_arg(args, efi_physical_address_t);
-                for(j = 0; j < (len < 1 ? 1 : (len > 16 ? 16 : len)); j++) {
-                    for(i = 44; i >= 0; i -= 4) {
-                        n = (m >> i) & 15; *dst++ = n + (n>9?0x37:0x30);
-                        if(dst >= end) goto zro;
-                    }
-                    *dst++ = CL(':'); if(dst >= end) goto zro;
-                    *dst++ = CL(' '); if(dst >= end) goto zro;
-                    mem = (uint8_t*)m;
-                    for(i = 0; i < 16; i++) {
-                        n = (mem[i] >> 4) & 15; *dst++ = n + (n>9?0x37:0x30); if(dst >= end) goto zro;
-                        n = mem[i] & 15; *dst++ = n + (n>9?0x37:0x30); if(dst >= end) goto zro;
-                        *dst++ = CL(' ');if(dst >= end) goto zro;
-                    }
-                    *dst++ = CL(' '); if(dst >= end) goto zro;
-                    for(i = 0; i < 16; i++) {
-                        *dst++ = (mem[i] < 32 || mem[i] >= 127 ? CL('.') : (char_t)mem[i]);
-                        if(dst >= end) goto zro;
-                    }
-                    *dst++ = CL('\r'); if(dst >= end) goto zro;
-                    *dst++ = CL('\n'); if(dst >= end) goto zro;
-                    m += 16;
-                }
-            }
-        } else {
-put:        if(*fmt == CL('\n') && (orig == dst || *(dst - 1) != CL('\r'))) *dst++ = CL('\r');
-            *dst++ = *fmt;
-        }
-        fmt++;
-    }
-zro:*dst=0;
-    return (int)(dst-orig);
-#undef needsescape
-}
-
-int vsprintf(char_t *dst, const char_t *fmt, __builtin_va_list args)
-{
-    return vsnprintf(dst, BUFSIZ, fmt, args);
-}
-
-int sprintf(char_t *dst, const char_t* fmt, ...)
-{
-    int ret;
-    __builtin_va_list args;
-    __builtin_va_start(args, fmt);
-    ret = vsnprintf(dst, BUFSIZ, fmt, args);
-    __builtin_va_end(args);
-    return ret;
-}
-
-int snprintf(char_t *dst, size_t maxlen, const char_t* fmt, ...)
-{
-    int ret;
-    __builtin_va_list args;
-    __builtin_va_start(args, fmt);
-    ret = vsnprintf(dst, maxlen, fmt, args);
-    __builtin_va_end(args);
-    return ret;
-}
-
-int vprintf(const char_t* fmt, __builtin_va_list args)
-{
-    int ret;
-    wchar_t dst[BUFSIZ];
-#ifndef UEFI_NO_UTF8
-    char_t tmp[BUFSIZ];
-    ret = vsnprintf(tmp, BUFSIZ, fmt, args);
-    mbstowcs(dst, tmp, BUFSIZ - 1);
-#else
-    ret = vsnprintf(dst, BUFSIZ, fmt, args);
-#endif
-    ST->ConOut->OutputString(ST->ConOut, (wchar_t *)&dst);
-    return ret;
-}
-
-int printf(const char_t* fmt, ...)
-{
-    int ret;
-    __builtin_va_list args;
-    __builtin_va_start(args, fmt);
-    ret = vprintf(fmt, args);
-    __builtin_va_end(args);
-    return ret;
-}
-
-int vfprintf (FILE *__stream, const char_t *__format, __builtin_va_list args)
-{
-    wchar_t dst[BUFSIZ];
-    char_t tmp[BUFSIZ];
-    uintn_t ret, i;
-#ifndef UEFI_NO_UTF8
-    ret = (uintn_t)vsnprintf(tmp, BUFSIZ, __format, args);
-    ret = mbstowcs(dst, tmp, BUFSIZ - 1);
-#else
-    ret = vsnprintf(dst, BUFSIZ, __format, args);
-#endif
-    if(ret < 1 || !__stream || __stream == stdin) return 0;
-    for(i = 0; i < __blk_ndevs; i++)
-        if(__stream == (FILE*)__blk_devs[i].bio) {
-            errno = EBADF;
-            return -1;
-        }
-    if(__stream == stdout)
-        ST->ConOut->OutputString(ST->ConOut, (wchar_t*)&dst);
-    else if(__stream == stderr)
-        ST->StdErr->OutputString(ST->StdErr, (wchar_t*)&dst);
-    else if(__ser && __stream == (FILE*)__ser) {
-#ifdef UEFI_NO_UTF8
-        wcstombs((char*)&tmp, dst, BUFSIZ - 1);
-#endif
-        __ser->Write(__ser, &ret, (void*)&tmp);
-    } else
-#ifndef UEFI_NO_UTF8
-        __stream->Write(__stream, &ret, (void*)&tmp);
-#else
-        __stream->Write(__stream, &ret, (void*)&dst);
-#endif
-    return (int)ret;
-}
-
-int fprintf (FILE *__stream, const char_t *__format, ...)
-{
-    int ret;
-    __builtin_va_list args;
-    __builtin_va_start(args, __format);
-    ret = vfprintf(__stream, __format, args);
-    __builtin_va_end(args);
-    return ret;
-}
-
-int getchar_ifany (void)
-{
-    efi_input_key_t key = { 0 };
-    efi_status_t status = ST->ConIn->ReadKeyStroke(ST->ConIn, &key);
-    return EFI_ERROR(status) ? 0 : key.UnicodeChar;
-}
-
-int getchar (void)
-{
-    uintn_t idx;
-    BS->WaitForEvent(1, &ST->ConIn->WaitForKey, &idx);
-    return getchar_ifany();
-}
-
-int putchar (int __c)
-{
-    wchar_t tmp[2];
-    tmp[0] = (wchar_t)__c;
-    tmp[1] = 0;
-    ST->ConOut->OutputString(ST->ConOut, (__c == L'\n' ? (wchar_t*)L"\r\n" : (wchar_t*)&tmp));
-    return (int)tmp[0];
-}

Bootloader/Source/uefi/stdlib.c

@@ -1,365 +0,0 @@
-/*
- * stdlib.c
- *
- * Copyright (C) 2021 bzt (bztsrc@gitlab)
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * This file is part of the POSIX-UEFI package.
- * @brief Implementing functions which are defined in stdlib.h
- *
- */
-
-#include <uefi.h>
-
-int errno = 0;
-static uint64_t __srand_seed = 6364136223846793005ULL;
-extern void __stdio_cleanup(void);
-#ifndef UEFI_NO_TRACK_ALLOC
-static uintptr_t *__stdlib_allocs = NULL;
-static uintn_t __stdlib_numallocs = 0;
-#endif
-
-int atoi(const char_t *s)
-{
-    return (int)atol(s);
-}
-
-int64_t atol(const char_t *s)
-{
-    int64_t sign = 1;
-    if(!s || !*s) return 0;
-    if(*s == CL('-')) { sign = -1; s++; }
-    if(s[0] == CL('0')) {
-        if(s[1] == CL('x'))
-            return strtol(s + 2, NULL, 16) * sign;
-        if(s[1] >= CL('0') && s[1] <= CL('7'))
-            return strtol(s, NULL, 8) * sign;
-    }
-    return strtol(s, NULL, 10) * sign;
-}
-
-int64_t strtol (const char_t *s, char_t **__endptr, int __base)
-{
-    int64_t v=0, sign = 1;
-    if(!s || !*s) return 0;
-    if(*s == CL('-')) { sign = -1; s++; }
-    while(!(*s < CL('0') || (__base < 10 && *s >= __base + CL('0')) || (__base >= 10 && ((*s > CL('9') && *s < CL('A')) ||
-            (*s > CL('F') && *s < CL('a')) || *s > CL('f'))))) {
-        v *= __base;
-        if(*s >= CL('0') && *s <= (__base < 10 ? __base + CL('0') : CL('9')))
-            v += (*s)-CL('0');
-        else if(__base == 16 && *s >= CL('a') && *s <= CL('f'))
-            v += (*s)-CL('a')+10;
-        else if(__base == 16 && *s >= CL('A') && *s <= CL('F'))
-            v += (*s)-CL('A')+10;
-        s++;
-    }
-    if(__endptr) *__endptr = (char_t*)s;
-    return v * sign;
-}
-
-void *malloc (size_t __size)
-{
-    void *ret = NULL;
-    efi_status_t status;
-#ifndef UEFI_NO_TRACK_ALLOC
-    uintn_t i;
-    for(i = 0; i < __stdlib_numallocs && __stdlib_allocs[i] != 0; i += 2);
-    if(i == __stdlib_numallocs) {
-        /* no free slots found, (re)allocate the housekeeping array */
-        status = BS->AllocatePool(LIP ? LIP->ImageDataType : EfiLoaderData, (__stdlib_numallocs + 2) * sizeof(uintptr_t), &ret);
-        if(EFI_ERROR(status) || !ret) { errno = ENOMEM; return NULL; }
-        if(__stdlib_allocs) memcpy(ret, __stdlib_allocs, __stdlib_numallocs * sizeof(uintptr_t));
-        __stdlib_allocs = (uintptr_t*)ret;
-        __stdlib_allocs[i] = __stdlib_allocs[i + 1] = 0;
-        __stdlib_numallocs += 2;
-        ret = NULL;
-    }
-#endif
-    status = BS->AllocatePool(LIP ? LIP->ImageDataType : EfiLoaderData, __size, &ret);
-    if(EFI_ERROR(status) || !ret) { errno = ENOMEM; ret = NULL; }
-#ifndef UEFI_NO_TRACK_ALLOC
-    __stdlib_allocs[i] = (uintptr_t)ret;
-    __stdlib_allocs[i + 1] = (uintptr_t)__size;
-#endif
-    return ret;
-}
-
-void *calloc (size_t __nmemb, size_t __size)
-{
-    void *ret = malloc(__nmemb * __size);
-    if(ret) memset(ret, 0, __nmemb * __size);
-    return ret;
-}
-
-void *realloc (void *__ptr, size_t __size)
-{
-    void *ret = NULL;
-    efi_status_t status;
-#ifndef UEFI_NO_TRACK_ALLOC
-    uintn_t i;
-#endif
-    if(!__ptr) return malloc(__size);
-    if(!__size) { free(__ptr); return NULL; }
-#ifndef UEFI_NO_TRACK_ALLOC
-    /* get the slot which stores the old size for this buffer */
-    for(i = 0; i < __stdlib_numallocs && __stdlib_allocs[i] != (uintptr_t)__ptr; i += 2);
-    if(i == __stdlib_numallocs) { errno = ENOMEM; return NULL; }
-    /* allocate a new buffer and copy data from old buffer */
-    status = BS->AllocatePool(LIP ? LIP->ImageDataType : EfiLoaderData, __size, &ret);
-    if(EFI_ERROR(status) || !ret) { errno = ENOMEM; ret = NULL; }
-    else {
-        memcpy(ret, (void*)__stdlib_allocs[i], __stdlib_allocs[i + 1] < __size ? __stdlib_allocs[i + 1] : __size);
-        if(__size > __stdlib_allocs[i + 1]) memset((uint8_t*)ret + __stdlib_allocs[i + 1], 0, __size - __stdlib_allocs[i + 1]);
-        /* free old buffer and store new buffer in slot */
-        BS->FreePool((void*)__stdlib_allocs[i]);
-        __stdlib_allocs[i] = (uintptr_t)ret;
-        __stdlib_allocs[i + 1] = (uintptr_t)__size;
-    }
-#else
-    status = BS->AllocatePool(LIP ? LIP->ImageDataType : EfiLoaderData, __size, &ret);
-    if(EFI_ERROR(status) || !ret) { errno = ENOMEM; return NULL; }
-    /* this means out of bounds read, but fine with POSIX as the end of new buffer supposed to be left uninitialized) */
-    memcpy(ret, (void*)__ptr, __size);
-    BS->FreePool((void*)__ptr);
-#endif
-    return ret;
-}
-
-void free (void *__ptr)
-{
-    efi_status_t status;
-#ifndef UEFI_NO_TRACK_ALLOC
-    uintn_t i;
-#endif
-    if(!__ptr) { errno = ENOMEM; return; }
-#ifndef UEFI_NO_TRACK_ALLOC
-    /* find and clear the slot */
-    for(i = 0; i < __stdlib_numallocs && __stdlib_allocs[i] != (uintptr_t)__ptr; i += 2);
-    if(i == __stdlib_numallocs) { errno = ENOMEM; return; }
-    __stdlib_allocs[i] = 0;
-    __stdlib_allocs[i + 1] = 0;
-    /* if there are only empty slots, free the housekeeping array too */
-    for(i = 0; i < __stdlib_numallocs && __stdlib_allocs[i] == 0; i += 2);
-    if(i == __stdlib_numallocs) { BS->FreePool(__stdlib_allocs); __stdlib_allocs = NULL; __stdlib_numallocs = 0; }
-#endif
-    status = BS->FreePool(__ptr);
-    if(EFI_ERROR(status)) errno = ENOMEM;
-}
-
-void abort ()
-{
-#ifndef UEFI_NO_TRACK_ALLOC
-    if(__stdlib_allocs)
-        BS->FreePool(__stdlib_allocs);
-    __stdlib_allocs = NULL;
-    __stdlib_numallocs = 0;
-#endif
-    __stdio_cleanup();
-    BS->Exit(IM, EFI_ABORTED, 0, NULL);
-}
-
-void exit (int __status)
-{
-#ifndef UEFI_NO_TRACK_ALLOC
-    if(__stdlib_allocs)
-        BS->FreePool(__stdlib_allocs);
-    __stdlib_allocs = NULL;
-    __stdlib_numallocs = 0;
-#endif
-    __stdio_cleanup();
-    BS->Exit(IM, !__status ? 0 : (__status < 0 ? EFIERR(-__status) : EFIERR(__status)), 0, NULL);
-}
-
-int exit_bs()
-{
-    efi_status_t status = 0;
-    efi_memory_descriptor_t *memory_map = NULL;
-    uintn_t cnt = 3, memory_map_size=0, map_key=0, desc_size=0;
-#ifndef UEFI_NO_TRACK_ALLOC
-    if(__stdlib_allocs)
-        BS->FreePool(__stdlib_allocs);
-    __stdlib_allocs = NULL;
-    __stdlib_numallocs = 0;
-#endif
-    __stdio_cleanup();
-    while(cnt--) {
-        status = BS->GetMemoryMap(&memory_map_size, memory_map, &map_key, &desc_size, NULL);
-        if (status!=EFI_BUFFER_TOO_SMALL) break;
-        status = BS->ExitBootServices(IM, map_key);
-        if(!EFI_ERROR(status)) return 0;
-    }
-    return (int)(status & 0xffff);
-}
-
-void *bsearch(const void *key, const void *base, size_t nmemb, size_t size, __compar_fn_t cmp)
-{
-    uint64_t s=0, e=nmemb, m;
-    int ret;
-    while (s < e) {
-        m = s + (e-s)/2;
-        ret = cmp(key, (uint8_t*)base + m*size);
-        if (ret < 0) e = m; else
-        if (ret > 0) s = m+1; else
-            return (void *)((uint8_t*)base + m*size);
-    }
-    return NULL;
-}
-
-int mblen(const char *s, size_t n)
-{
-    const char *e = s+n;
-    int c = 0;
-    if(s) {
-        while(s < e && *s) {
-            if((*s & 128) != 0) {
-                if((*s & 32) == 0 ) s++; else
-                if((*s & 16) == 0 ) s+=2; else
-                if((*s & 8) == 0 ) s+=3;
-            }
-            c++;
-            s++;
-        }
-    }
-    return c;
-}
-
-int mbtowc (wchar_t * __pwc, const char *s, size_t n)
-{
-    wchar_t arg;
-    int ret = 1;
-    if(!s || !*s) return 0;
-    arg = (wchar_t)*s;
-    if((*s & 128) != 0) {
-        if((*s & 32) == 0 && n > 0) { arg = ((*s & 0x1F)<<6)|(*(s+1) & 0x3F); ret = 2; } else
-        if((*s & 16) == 0 && n > 1) { arg = ((*s & 0xF)<<12)|((*(s+1) & 0x3F)<<6)|(*(s+2) & 0x3F); ret = 3; } else
-        if((*s & 8) == 0 && n > 2) { arg = ((*s & 0x7)<<18)|((*(s+1) & 0x3F)<<12)|((*(s+2) & 0x3F)<<6)|(*(s+3) & 0x3F); ret = 4; }
-        else return -1;
-    }
-    if(__pwc) *__pwc = arg;
-    return ret;
-}
-
-int wctomb (char *s, wchar_t u)
-{
-    int ret = 0;
-    if(u<0x80) {
-        *s = u;
-        ret = 1;
-    } else if(u<0x800) {
-        *(s+0)=((u>>6)&0x1F)|0xC0;
-        *(s+1)=(u&0x3F)|0x80;
-        ret = 2;
-    } else {
-        *(s+0)=((u>>12)&0x0F)|0xE0;
-        *(s+1)=((u>>6)&0x3F)|0x80;
-        *(s+2)=(u&0x3F)|0x80;
-        ret = 3;
-    }
-    return ret;
-}
-
-size_t mbstowcs (wchar_t *__pwcs, const char *__s, size_t __n)
-{
-    int r;
-    wchar_t *orig = __pwcs;
-    if(!__s || !*__s) return 0;
-    while(*__s) {
-        r = mbtowc(__pwcs, __s, __n - (size_t)(__pwcs - orig));
-        if(r < 0) return (size_t)-1;
-        __pwcs++;
-        __s += r;
-    }
-    *__pwcs = 0;
-    return (size_t)(__pwcs - orig);
-}
-
-size_t wcstombs (char *__s, const wchar_t *__pwcs, size_t __n)
-{
-    int r;
-    char *orig = __s;
-    if(!__s || !__pwcs || !*__pwcs) return 0;
-    while(*__pwcs && ((size_t)(__s - orig + 4) < __n)) {
-        r = wctomb(__s, *__pwcs);
-        if(r < 0) return (size_t)-1;
-        __pwcs++;
-        __s += r;
-    }
-    *__s = 0;
-    return (size_t)(__s - orig);
-}
-
-void srand(unsigned int __seed)
-{
-    __srand_seed = __seed - 1;
-}
-
-int rand()
-{
-    efi_guid_t rngGuid = EFI_RNG_PROTOCOL_GUID;
-    efi_rng_protocol_t *rng = NULL;
-    efi_status_t status;
-    int ret = 0;
-
-    __srand_seed = 6364136223846793005ULL*__srand_seed + 1;
-    status = BS->LocateProtocol(&rngGuid, NULL, (void**)&rng);
-    if(!EFI_ERROR(status) && rng)
-        rng->GetRNG(rng, NULL, (uintn_t)sizeof(int), (uint8_t*)&ret);
-    ret ^= (int)(__srand_seed>>33);
-    return ret;
-}
-
-uint8_t *getenv(char_t *name, uintn_t *len)
-{
-    efi_guid_t globGuid = EFI_GLOBAL_VARIABLE;
-    uint8_t tmp[EFI_MAXIMUM_VARIABLE_SIZE], *ret;
-    uint32_t attr;
-    efi_status_t status;
-#ifndef UEFI_NO_UTF8
-    wchar_t wcname[256];
-    mbstowcs((wchar_t*)&wcname, name, 256);
-    status = RT->GetVariable((wchar_t*)&wcname, &globGuid, &attr, len, &tmp);
-#else
-    status = RT->GetVariable(name, &globGuid, &attr, len, &tmp);
-#endif
-    if(EFI_ERROR(status) || *len < 1 || !(ret = malloc((*len) + 1))) {
-        *len = 0;
-        return NULL;
-    }
-    memcpy(ret, tmp, *len);
-    ret[*len] = 0;
-    return ret;
-}
-
-int setenv(char_t *name, uintn_t len, uint8_t *data)
-{
-    efi_guid_t globGuid = EFI_GLOBAL_VARIABLE;
-    efi_status_t status;
-#ifndef UEFI_NO_UTF8
-    wchar_t wcname[256];
-    mbstowcs((wchar_t*)&wcname, name, 256);
-    status = RT->SetVariable(wcname, &globGuid, 0, len, data);
-#else
-    status = RT->SetVariable(name, &globGuid, 0, len, data);
-#endif
-    return !EFI_ERROR(status);
-}

Bootloader/Source/uefi/string.c

@@ -1,262 +0,0 @@
-/*
- * string.c
- *
- * Copyright (C) 2021 bzt (bztsrc@gitlab)
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * This file is part of the POSIX-UEFI package.
- * @brief Implementing functions which are defined in string.h
- *
- */
-
-#include <uefi.h>
-
-void *memcpy(void *dst, const void *src, size_t n)
-{
-    uint8_t *a=(uint8_t*)dst,*b=(uint8_t*)src;
-    if(src && dst && src != dst && n>0) {
-        while(n--) *a++ = *b++;
-    }
-    return dst;
-}
-
-void *memmove(void *dst, const void *src, size_t n)
-{
-    uint8_t *a=(uint8_t*)dst,*b=(uint8_t*)src;
-    if(src && dst && src != dst && n>0) {
-        if(a>b && a<b+n) {
-            a+=n-1; b+=n-1; while(n-->0) *a--=*b--;
-        } else {
-            while(n--) *a++ = *b++;
-        }
-    }
-    return dst;
-}
-
-void *memset(void *s, int c, size_t n)
-{
-    uint8_t *p=(uint8_t*)s;
-    if(s && n>0) {
-        while(n--) *p++ = (uint8_t)c;
-    }
-    return s;
-}
-
-int memcmp(const void *s1, const void *s2, size_t n)
-{
-    uint8_t *a=(uint8_t*)s1,*b=(uint8_t*)s2;
-    if(s1 && s2 && s1 != s2 && n>0) {
-        while(n--) {
-            if(*a != *b) return *a - *b;
-            a++; b++;
-        }
-    }
-    return 0;
-}
-
-void *memchr(const void *s, int c, size_t n)
-{
-    uint8_t *e, *p=(uint8_t*)s;
-    if(s && n>0) {
-        for(e=p+n; p<e; p++) if(*p==(uint8_t)c) return p;
-    }
-    return NULL;
-}
-
-void *memrchr(const void *s, int c, size_t n)
-{
-    uint8_t *e, *p=(uint8_t*)s;
-    if(s && n>0) {
-        for(e=p+n; p<e; --e) if(*e==(uint8_t)c) return e;
-    }
-    return NULL;
-}
-
-void *memmem(const void *haystack, size_t hl, const void *needle, size_t nl)
-{
-    uint8_t *c = (uint8_t*)haystack;
-    if(!haystack || !needle || !hl || !nl || nl > hl) return NULL;
-    hl -= nl - 1;
-    while(hl) {
-        if(!memcmp(c, needle, nl)) return c;
-        c++; hl--;
-    }
-    return NULL;
-}
-
-void *memrmem(const void *haystack, size_t hl, const void *needle, size_t nl)
-{
-    uint8_t *c = (uint8_t*)haystack;
-    if(!haystack || !needle || !hl || !nl || nl > hl) return NULL;
-    hl -= nl;
-    c += hl;
-    while(hl) {
-        if(!memcmp(c, needle, nl)) return c;
-        c--; hl--;
-    }
-    return NULL;
-}
-
-char_t *strcpy(char_t *dst, const char_t *src)
-{
-    char_t *s = dst;
-    if(src && dst && src != dst) {
-        while(*src) {*dst++=*src++;} *dst=0;
-    }
-    return s;
-}
-
-char_t *strncpy(char_t *dst, const char_t *src, size_t n)
-{
-    char_t *s = dst;
-    const char_t *e = src+n;
-    if(src && dst && src != dst && n>0) {
-        while(*src && src<e) {*dst++=*src++;} *dst=0;
-    }
-    return s;
-}
-
-char_t *strcat(char_t *dst, const char_t *src)
-{
-    char_t *s = dst;
-    if(src && dst) {
-        dst += strlen(dst);
-        while(*src) {*dst++=*src++;} *dst=0;
-    }
-    return s;
-}
-
-int strcmp(const char_t *s1, const char_t *s2)
-{
-    if(s1 && s2 && s1!=s2) {
-        while(*s1 && *s1==*s2){s1++;s2++;}
-        return *s1-*s2;
-    }
-    return 0;
-}
-
-char_t *strncat(char_t *dst, const char_t *src, size_t n)
-{
-    char_t *s = dst;
-    const char_t *e = src+n;
-    if(src && dst && n>0) {
-        dst += strlen(dst);
-        while(*src && src<e) {*dst++=*src++;} *dst=0;
-    }
-    return s;
-}
-
-int strncmp(const char_t *s1, const char_t *s2, size_t n)
-{
-    const char_t *e = s1+n-1;
-    if(s1 && s2 && s1!=s2 && n>0) {
-        while(s1<e && *s1 && *s1==*s2){s1++;s2++;}
-        return *s1-*s2;
-    }
-    return 0;
-}
-
-char_t *strdup(const char_t *s)
-{
-    size_t i = (strlen(s)+1) * sizeof(char_t);
-    char_t *s2 = (char_t *)malloc(i);
-    if(s2 != NULL) memcpy(s2, (const void*)s, i);
-    return s2;
-}
-
-char_t *strchr(const char_t *s, int c)
-{
-    if(s) {
-        while(*s) {
-            if(*s == (char_t)c) return (char_t*)s;
-            s++;
-        }
-    }
-    return NULL;
-}
-
-char_t *strrchr(const char_t *s, int c)
-{
-    char_t *e;
-    if(s) {
-        e = (char_t*)s + strlen(s) - 1;
-        while(s <= e) {
-            if(*e == (char_t)c) return e;
-            e--;
-        }
-    }
-    return NULL;
-}
-
-char_t *strstr(const char_t *haystack, const char_t *needle)
-{
-    return memmem(haystack, strlen(haystack) * sizeof(char_t), needle, strlen(needle) * sizeof(char_t));
-}
-
-static char_t *_strtok_r(char_t *s, const char_t *d, char_t **p)
-{
-    int c, sc;
-    char_t *tok, *sp;
-
-    if(d == NULL || (s == NULL && (s=*p) == NULL)) return NULL;
-again:
-    c = *s++;
-    for(sp = (char_t *)d; (sc=*sp++)!=0;) {
-        if(c == sc) goto again;
-    }
-
-    if (c == 0) { *p=NULL; return NULL; }
-    tok = s-1;
-    while(1) {
-        c = *s++;
-        sp = (char_t *)d;
-        do {
-            if((sc=*sp++) == c) {
-                if(c == 0) s = NULL;
-                else *(s-1) = 0;
-                *p = s;
-                return tok;
-            }
-        } while(sc != 0);
-    }
-    return NULL;
-}
-
-char_t *strtok(char_t *s, const char_t *delim)
-{
-    static char_t *p;
-    return _strtok_r (s, delim, &p);
-}
-
-char_t *strtok_r(char_t *s, const char_t *delim, char_t **ptr)
-{
-    return _strtok_r (s, delim, ptr);
-}
-
-size_t strlen (const char_t *__s)
-{
-    size_t ret;
-
-    if(!__s) return 0;
-    for(ret = 0; __s[ret]; ret++);
-    return ret;
-}

Bootloader/Source/uefi/time.c

@@ -1,146 +0,0 @@
-/*
- * time.c
- *
- * Copyright (C) 2021 bzt (bztsrc@gitlab)
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * This file is part of the POSIX-UEFI package.
- * @brief Implementing functions which are defined in time.h
- *
- */
-
-#include <uefi.h>
-
-static struct tm __tm;
-time_t __mktime_efi(efi_time_t *t);
-
-/* from musl */
-static uint64_t __year_to_secs(uint64_t year, int *is_leap)
-{
-    int y, cycles, centuries, leaps, rem;
-
-    if (year-2ULL <= 136) {
-        y = (int)year;
-        leaps = (y-68)>>2;
-        if (!((y-68)&3)) {
-            leaps--;
-            if (is_leap) *is_leap = 1;
-        } else if (is_leap) *is_leap = 0;
-        return 31536000ULL*(uint64_t)(y-70) + 86400ULL*(uint64_t)leaps;
-    }
-
-    if (!is_leap) is_leap = &(int){0};
-    cycles = (int)((year-100) / 400);
-    rem = (year-100) % 400;
-    if (rem < 0) {
-        cycles--;
-        rem += 400;
-    }
-    if (!rem) {
-        *is_leap = 1;
-        centuries = 0;
-        leaps = 0;
-    } else {
-        if (rem >= 200) {
-            if (rem >= 300) { centuries = 3; rem -= 300; }
-            else { centuries = 2; rem -= 200; }
-        } else {
-            if (rem >= 100) { centuries = 1; rem -= 100; }
-            else centuries = 0;
-        }
-        if (!rem) {
-            *is_leap = 0;
-            leaps = 0;
-        } else {
-            leaps = rem / 4;
-            rem %= 4;
-            *is_leap = !rem;
-        }
-    }
-
-    leaps += 97*cycles + 24*centuries - *is_leap;
-
-    return (uint64_t)(year-100) * 31536000ULL + (uint64_t)leaps * 86400ULL + 946684800ULL + 86400ULL;
-}
-
-time_t __mktime_efi(efi_time_t *t)
-{
-    __tm.tm_year = t->Year + (/* workaround some buggy firmware*/ t->Year > 2000 ? -1900 : 98);
-    __tm.tm_mon = t->Month - 1;
-    __tm.tm_mday = t->Day;
-    __tm.tm_hour = t->Hour;
-    __tm.tm_min = t->Minute;
-    __tm.tm_sec = t->Second;
-    __tm.tm_isdst = t->Daylight;
-    return mktime(&__tm);
-}
-
-/**
- * This isn't POSIX, no arguments. Just returns the current time in struct tm
- */
-struct tm *localtime (const time_t *__timer)
-{
-    efi_time_t t = {0};
-    (void)__timer;
-    ST->RuntimeServices->GetTime(&t, NULL);
-    __mktime_efi(&t);
-    return &__tm;
-}
-
-time_t mktime(const struct tm *tm)
-{
-    static const uint64_t secs_through_month[] = {
-        0, 31*86400, 59*86400, 90*86400,
-        120*86400, 151*86400, 181*86400, 212*86400,
-        243*86400, 273*86400, 304*86400, 334*86400 };
-    int is_leap;
-    uint64_t year = (uint64_t)tm->tm_year, t, adj;
-    int month = tm->tm_mon;
-    if (month >= 12 || month < 0) {
-        adj = (uint64_t)month / 12;
-        month %= 12;
-        if (month < 0) {
-            adj--;
-            month += 12;
-        }
-        year += adj;
-    }
-    t = __year_to_secs(year, &is_leap);
-    t += secs_through_month[month];
-    if (is_leap && month >= 2) t += 86400;
-    t += 86400ULL * (uint64_t)(tm->tm_mday-1);
-    t += 3600ULL * (uint64_t)tm->tm_hour;
-    t += 60ULL * (uint64_t)tm->tm_min;
-    t += (uint64_t)tm->tm_sec;
-    return (time_t)t;
-}
-
-time_t time(time_t *__timer)
-{
-    time_t ret;
-    efi_time_t t = {0};
-    ST->RuntimeServices->GetTime(&t, NULL);
-    ret = __mktime_efi(&t);
-    if(__timer) *__timer = ret;
-    return ret;
-}
-

Bootloader/Source/uefi/unistd.c

@@ -1,65 +0,0 @@
-/*
- * unistd.c
- *
- * Copyright (C) 2021 bzt (bztsrc@gitlab)
- *
- * Permission is hereby granted, free of charge, to any person
- * obtaining a copy of this software and associated documentation
- * files (the "Software"), to deal in the Software without
- * restriction, including without limitation the rights to use, copy,
- * modify, merge, publish, distribute, sublicense, and/or sell copies
- * of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be
- * included in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
- * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
- * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
- * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- * This file is part of the POSIX-UEFI package.
- * @brief Implementing functions which are defined in unistd.h
- *
- */
-
-#include <uefi.h>
-
-int __remove(const wchar_t *__filename, int isdir);
-
-int usleep (unsigned long int __useconds)
-{
-    BS->Stall(__useconds);
-    return 0;
-}
-
-unsigned int sleep (unsigned int __seconds)
-{
-    /* Issue 56: some real firmware is buggy and Stall doesn't work for large delays, so use a timer instead */
-    uint64_t usec = (uint64_t)__seconds * 1000000UL;
-    uintn_t index = 0;
-    efi_event_t timer_event;
-    efi_status_t status = status = BS->CreateEvent(EVT_TIMER, 0, NULL, NULL, &timer_event);
-    if(!EFI_ERROR(status)) {
-        BS->SetTimer(timer_event, TimerRelative, usec * 10UL);
-        BS->WaitForEvent(1, &timer_event, &index);
-        BS->CloseEvent(timer_event);
-    } else
-        BS->Stall(usec);
-    return 0;
-}
-
-int unlink (const wchar_t *__filename)
-{
-    return __remove(__filename, 0);
-}
-
-int rmdir (const wchar_t *__filename)
-{
-    return __remove(__filename, 1);
-}

Bootloader/cmake/aarch64-uefi.cmake

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright (c) 2026 0xKSor
+
 set(CMAKE_SYSTEM_NAME Generic)
 set(CMAKE_SYSTEM_PROCESSOR aarch64)
 

Bootloader/justfile

@@ -1,9 +1,13 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright (c) 2026 0xKSor
+
 BUILD_DIR := env_var_or_default("BUILD_DIR", justfile_directory() + "/.build") 
 TEMP_DIR := env_var_or_default("TEMP_DIR", BUILD_DIR + "/temp")
 build:
     cmake -B {{TEMP_DIR}}/Bootloader -S . \
           -DCMAKE_TOOLCHAIN_FILE=cmake/aarch64-uefi.cmake \
-          -DCMAKE_BUILD_TYPE=Release
+          -DCMAKE_BUILD_TYPE=Release \
+          -G Ninja
 
     cmake --build {{TEMP_DIR}}/Bootloader
 

Common/bootinfo.h

@@ -1,7 +1,10 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
 #pragma once
 
 typedef unsigned int       BIUInt32;
-typedef unsigned long long BIUInt64; 
+typedef unsigned long long BIUInt64;
 
 typedef struct {
     BIUInt32* base;
@@ -12,8 +15,8 @@ typedef struct {
 } BIFramebuffer;
 
 typedef struct {
-    void* map;             
+    void* map;
-    BIUInt64 mapSize;       
+    BIUInt64 mapSize;
     BIUInt64 descriptorSize;
     BIUInt32 mapKey;
     BIUInt32 descriptorVersion;
@@ -24,12 +27,21 @@ typedef struct {
     void* kernelAddress;
 } BIKernelInfo;
 
+typedef struct {
+    BIUInt64 physicalBase;
+    BIUInt64 size;
+    char name[32];
+    BIUInt64 capabilities;
+} BootModule;
+
 typedef struct {
     BIUInt64 magic;
     BIKernelInfo kernelInfo;
     void* dtb;
     BIMemoryMap memoryMap;
     BIFramebuffer framebuffer;
+    BootModule modules[16];
+    BIUInt32 moduleCount;
 } Bootinfo;
 
-#define BOOTINFO_MAGIC 0x736F6E7961
+#define BOOTINFO_MAGIC 0x736F6E7961

Kernel/.clangd

@@ -0,0 +1,3 @@
+CompileFlags:
+  CompilationDatabase: ../.build/temp/Kernel
+  Add: [-std=c23]

Kernel/CMakeLists.txt

@@ -1,140 +1,47 @@
-cmake_minimum_required(VERSION 3.10)
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright (c) 2026 0xKSor
+
+cmake_minimum_required(VERSION 3.20)
 project(ksOSKernel LANGUAGES ASM C)
-set(KERNEL_MODULE_NAME "Kernel")
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
-# --- Locate Swift toolchain with Embedded Swift stdlib ---
+file(GLOB_RECURSE KERNEL_SOURCES CMAKE_CONFIGURE_DEPENDS
-# Priority: cmake var > env var > auto-detect
+    ${CMAKE_CURRENT_SOURCE_DIR}/Source/KernelMain.c
-if(NOT SWIFT_TOOLCHAIN AND DEFINED ENV{SWIFT_TOOLCHAIN})
+    ${CMAKE_CURRENT_SOURCE_DIR}/Source/Arch/entry.S
-    set(SWIFT_TOOLCHAIN "$ENV{SWIFT_TOOLCHAIN}")
+    ${CMAKE_CURRENT_SOURCE_DIR}/Source/Arch/vectors.S
-endif()
+    ${CMAKE_CURRENT_SOURCE_DIR}/Source/**/*.c
+)
 
-if(SWIFT_TOOLCHAIN)
+add_executable(Kernel ${KERNEL_SOURCES})
-    set(SWIFTC             "${SWIFT_TOOLCHAIN}/usr/bin/swiftc")
+target_include_directories(Kernel PRIVATE
-    set(SWIFT_RESOURCE_DIR "${SWIFT_TOOLCHAIN}/usr/lib/swift")
+    ${CMAKE_CURRENT_SOURCE_DIR}/Include/
-elseif(CMAKE_HOST_SYSTEM_NAME STREQUAL "Darwin")
+    ${CMAKE_CURRENT_SOURCE_DIR}/../Common
-    # Scan for a swift.org toolchain that ships the embedded stdlib.
+)
-    # APPLE is false here (target is Generic), so we check the HOST OS.
-    file(GLOB _tc_candidates
-        "$ENV{HOME}/Library/Developer/Toolchains/*.xctoolchain"
-        "/Library/Developer/Toolchains/*.xctoolchain"
-    )
-    foreach(_tc ${_tc_candidates})
-        if(EXISTS "${_tc}/usr/lib/swift/embedded")
-            set(SWIFTC             "${_tc}/usr/bin/swiftc")
-            set(SWIFT_RESOURCE_DIR "${_tc}/usr/lib/swift")
-            break()
-        endif()
-    endforeach()
-else()
-    # Linux: find swiftc in PATH
-    find_program(_SWIFTC_EXE swiftc)
-    if(_SWIFTC_EXE)
-        get_filename_component(_SWIFTC_BIN "${_SWIFTC_EXE}" DIRECTORY)
-        get_filename_component(_SWIFTC_USR "${_SWIFTC_BIN}" DIRECTORY)
-        
-        if(EXISTS "${_SWIFTC_USR}/lib/swift/embedded")
-            set(SWIFTC             "${_SWIFTC_EXE}")
-            set(SWIFT_RESOURCE_DIR "${_SWIFTC_USR}/lib/swift")
-        elseif(EXISTS "${_SWIFTC_USR}/lib/swift/lib/swift/embedded")
-            set(SWIFTC             "${_SWIFTC_EXE}")
-            set(SWIFT_RESOURCE_DIR "${_SWIFTC_USR}/lib/swift/lib/swift")
-        endif()
-    endif()
-endif()
 
-if(NOT SWIFTC OR NOT EXISTS "${SWIFT_RESOURCE_DIR}/embedded")
+target_compile_options(Kernel PRIVATE
-    message(FATAL_ERROR
+    $<$<COMPILE_LANGUAGE:C>:
-        "Swift toolchain with Embedded Swift not found.\n"
+        -std=c23
-        "Install a swift.org toolchain and pass -DSWIFT_TOOLCHAIN=<root> "
+        -ffreestanding
-        "or set the SWIFT_TOOLCHAIN env var.")
+        -fno-stack-protector
-endif()
+        -fno-builtin
+        -Wall -Wextra
+        -Wno-incompatible-library-redeclaration
+        -g
+        -mgeneral-regs-only
+    >
+)
 
-message(STATUS "Swift: ${SWIFTC}")
+target_link_options(Kernel PRIVATE
-message(STATUS "Swift resource dir: ${SWIFT_RESOURCE_DIR}")
-
-# --- Build ---
-add_compile_options(-ffreestanding -nostdlib -O0 -g)
-
-set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld)
-add_link_options(
-    -fuse-ld=lld
     -nostdlib
     -static
-    -Wl,-T,${LINKER_SCRIPT}
+    -no-pie
+    -T "${CMAKE_CURRENT_SOURCE_DIR}/linker.ld"
+    -z max-page-size=0x1000
+    --image-base=0x40100000
+    --no-dynamic-linker
 )
 
-set(SWIFT_SOURCES 
+set_target_properties(Kernel PROPERTIES
-    ${CMAKE_CURRENT_SOURCE_DIR}/Source/kernel.swift
+    OUTPUT_NAME "ksOSKernel.elf"
-    ${CMAKE_CURRENT_SOURCE_DIR}/Source/Arch/dtb.swift
+    RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}"
-    ${CMAKE_CURRENT_SOURCE_DIR}/Source/IO/uart.swift
 )
-set(SWIFT_OBJ     ${CMAKE_CURRENT_BINARY_DIR}/kernel_swift.o)
-
-add_custom_command(
-    OUTPUT ${SWIFT_OBJ}
-    COMMAND ${SWIFTC}
-        -target aarch64-none-none-elf
-        -enable-experimental-feature Embedded
-        -parse-as-library
-        -wmo
-        -O
-        -Xcc -fno-stack-protector
-        -Xcc -I${CMAKE_CURRENT_SOURCE_DIR}/../Common
-        -import-bridging-header ${CMAKE_CURRENT_SOURCE_DIR}/Source/Support/BridgingHeader.h
-        -resource-dir ${SWIFT_RESOURCE_DIR}
-        -c ${SWIFT_SOURCES}
-        -o ${SWIFT_OBJ}
-    COMMAND ${LLVM_OBJCOPY} --remove-section=.swift_modhash ${SWIFT_OBJ}
-    DEPENDS ${SWIFT_SOURCES}
-    COMMENT "Compiling Swift kernel"
-)
-
-set_source_files_properties(${SWIFT_OBJ} PROPERTIES
-    EXTERNAL_OBJECT TRUE
-    GENERATED TRUE
-)
-
-add_executable(kernel.elf Source/Arch/entry.S Source/Support/stubs.c ${SWIFT_OBJ})
-
-add_custom_command(TARGET kernel.elf POST_BUILD
-    COMMAND ${LLVM_OBJCOPY} -O binary kernel.elf kernel.bin
-)
-
-# --- SourceKit-LSP: generate compile_commands.json for Swift (Dynamic) ---
-set(_BRIDGING_HEADER "${CMAKE_CURRENT_SOURCE_DIR}/Source/Support/BridgingHeader.h")
-
-set(SWIFT_ARGS 
-    "\"${SWIFTC}\""
-    "\"-target\"" "\"aarch64-none-none-elf\""
-    "\"-enable-experimental-feature\"" "\"Embedded\""
-    "\"-module-name\"" "\"${KERNEL_MODULE_NAME}\""
-    "\"-parse-as-library\""
-    "\"-import-bridging-header\"" "\"${_BRIDGING_HEADER}\""
-)
-foreach(_src IN LISTS SWIFT_SOURCES)
-    list(APPEND SWIFT_ARGS "\"${_src}\"")
-endforeach()
-
-string(JOIN ", " SWIFT_ARGS_JSON ${SWIFT_ARGS})
-
-set(COMPDB_ENTRIES "")
-list(LENGTH SWIFT_SOURCES _src_count)
-math(EXPR _last_idx "${_src_count} - 1")
-set(_idx 0)
-
-foreach(_src IN LISTS SWIFT_SOURCES)
-    set(_entry "  {\n    \"file\": \"${_src}\",\n    \"directory\": \"${CMAKE_CURRENT_BINARY_DIR}\",\n    \"arguments\": [${SWIFT_ARGS_JSON}]\n  }")
-    
-    if(_idx LESS _last_idx)
-        string(APPEND _entry ",\n")
-    else()
-        string(APPEND _entry "\n")
-    endif()
-    
-    string(APPEND COMPDB_ENTRIES "${_entry}")
-    math(EXPR _idx "${_idx} + 1")
-endforeach()
-
-file(GENERATE OUTPUT "${CMAKE_CURRENT_SOURCE_DIR}/compile_commands.json"
-    CONTENT "[\n${COMPDB_ENTRIES}]\n"
-)

Kernel/Include/Arch/CPU.h

@@ -0,0 +1,114 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+
+static inline void CPUYield() {
+    __asm__ volatile ("yield" ::: "memory");
+}
+
+static inline void CPUWaitForInterrupt() {
+    __asm__ volatile ("wfi" ::: "memory");
+}
+
+static inline void CPUDisableInterrupts() {
+    __asm__ volatile ("msr daifset, #3" ::: "memory");
+}
+
+static inline void CPUEnableInterrupts() {
+    __asm__ volatile ("msr daifclr, #3" ::: "memory");
+}
+
+static inline UInt64 CPUGetFAR() {
+    UInt64 far;
+    __asm__ volatile ("mrs %0, far_el1" : "=r" (far));
+    return far;
+}
+
+static inline void CPUInvalidateTLB(Address virt) {
+    __asm__ volatile(
+        "dsb ishst\n"
+        "tlbi vaae1is, %0\n"
+        "dsb ish\n"
+        "isb\n"
+        :: "r" (virt >> 12) : "memory"
+    );
+}
+
+static inline void CPUCleanAndInvalidateCode(Pointer codeVirt, Size size) {
+    // Read cache line sizes from CTR_EL0
+    UInt64 ctr;
+    __asm__ volatile ("mrs %0, ctr_el0" : "=r" (ctr));
+    UInt64 dcacheLineSize = 4ULL << ((ctr >> 16) & 0xF);
+    UInt64 icacheLineSize = 4ULL << (ctr & 0xF);
+
+    Address addr = (Address)codeVirt;
+    Address end = addr + size;
+
+    // Clean D-cache to PoU (Point of Unification)
+    for (Address va = addr; va < end; va += dcacheLineSize) {
+        __asm__ volatile ("dc cvau, %0" :: "r" (va) : "memory");
+    }
+    __asm__ volatile ("dsb ish" ::: "memory");
+
+    // Invalidate I-cache to PoU
+    for (Address va = addr; va < end; va += icacheLineSize) {
+        __asm__ volatile ("ic ivau, %0" :: "r" (va) : "memory");
+    }
+    __asm__ volatile ("dsb ish\nisb" ::: "memory");
+}
+
+static inline void CPUEnableMMU(Address l0PhysicalAddress) {
+    // MAIR_EL1 (Memory Attribute Indirection Register)
+    // kPTENormalMem is index 0 and kPTEDeviceMem is index 1
+    // 0xFF = Normal, 0x00 = Device
+    UInt64 mair = (0xFFULL << 0) | (0x00ULL << 8); 
+
+    // TCR_EL1 (Translation Control Register)
+    // configures the mmu for 4kb pages and 48bit virtual addresses
+    // t0sz/t1sz = 16 (64-48 = 16)
+    // tg0/tg1 = 4kb granule
+    UInt64 tcr = (16ULL << 0)   | // T0SZ  (userspace size)
+                 (16ULL << 16)  | // T1SZ  (kernelspace size)
+                 (0ULL  << 14)  | // TG0   (User 4KB)
+                 (2ULL  << 30)  | // TG1   (Kernel 4KB)
+                 (3ULL  << 28)  | // SH1   (Inner Shareable)
+                 (3ULL  << 12)  | // SH0   (Inner Shareable)
+                 (5ULL  << 32);   // IPS
+
+     __asm__ volatile (
+        "msr mair_el1, %0\n"
+        "msr tcr_el1, %1\n"
+        "msr ttbr0_el1, %2\n"  // set userspace root
+        "msr ttbr1_el1, %2\n"  // set kernelspace root
+        "tlbi vmalle1is\n"  
+        "isb\n"                // Instruction Synchronization Barrier
+        :: "r"(mair), "r"(tcr), "r"(l0PhysicalAddress) : "memory"
+    );
+            
+    // turn on the MMU in SCTLR_EL1 (System Control Register)
+    // Bit 0 = M (MMU Enable), Bit 2 = C (Data Cache Enable), Bit 12 = I (Instruction Cache Enable)
+    UInt64 sctlr;
+    UInt64 sctlr_flags = 0x1005; // set bits 0 (M), 2 (C), and 12 (I)
+    __asm__ volatile (
+        "mrs %0, sctlr_el1\n"
+        "orr %0, %0, %1\n"
+        "msr sctlr_el1, %0\n"
+        "isb\n"
+        : "=r"(sctlr) : "r"(sctlr_flags) : "memory"
+    );
+}
+
+static inline void CPUSwitchAddressSpace(Address l0Physical) {
+    __asm__ volatile(
+        "dsb ishst\n"             // wait till all previous writes are finished physically
+        "msr ttbr0_el1, %0\n"     // Update TTBR0_EL1 (userspace)
+        "tlbi vmalle1is\n"        // Reset TLB cache
+        "dsb ish\n"               // wait for tlb cache to reset
+        "isb\n"                   // Clear instruction pipeline
+        :: "r" (l0Physical) : "memory"
+    );
+}
+
+#define CPUException(number) __asm__ volatile ("svc %0" :: "i" (number) : "memory")

Kernel/Include/Arch/DTB.h

@@ -0,0 +1,39 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+
+#include <Types.h>
+#include <VM/PMM.h>
+
+typedef struct FDTHeader {
+    UInt32 magic;                // 0xd00dfeed
+    UInt32 totalSize;
+    UInt32 offDtStruct;
+    UInt32 offDtStrings;
+    UInt32 offMemRsvMap;
+    UInt32 version;
+    UInt32 lastCompVersion;
+    UInt32 bootCpuidPhys;
+    UInt32 sizeDtStrings;
+    UInt32 sizeDtStruct;
+} FDTHeader;
+
+typedef struct FDTProperty {
+    UInt32 length;
+    UInt32 nameOffset;
+} FDTProperty;
+
+typedef enum FDTToken {
+    FDTTokenBeginNode = 0x1,
+    FDTTokenEndNode = 0x2,
+    FDTTokenProperty = 0x3,
+    FDTTokenNOP = 0x4,
+    FDTTokenEnd = 0x9,
+} FDTToken;
+
+enum {
+    kFDTHeaderMagic = 0xd00dfeed,
+};
+
+void DTBParse(Pointer dtb, VMBootMemoryMap* bootMap);

Kernel/Include/Arch/Exceptions.h

@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+
+typedef struct ExceptionsContext {
+    UInt64 x0;
+    UInt64 x1;
+    UInt64 x2;
+    UInt64 x3;
+    UInt64 x4;
+    UInt64 x5;
+    UInt64 x6;
+    UInt64 x7;
+    UInt64 x8;
+    UInt64 x9;
+    UInt64 x10;
+    UInt64 x11;
+    UInt64 x12;
+    UInt64 x13;
+    UInt64 x14;
+    UInt64 x15;
+    UInt64 x16;
+    UInt64 x17;
+    UInt64 x18;
+    UInt64 x19;
+    UInt64 x20;
+    UInt64 x21;
+    UInt64 x22;
+    UInt64 x23;
+    UInt64 x24;
+    UInt64 x25;
+    UInt64 x26;
+    UInt64 x27;
+    UInt64 x28;
+    UInt64 x29; // fp
+    UInt64 x30; // lr
+    UInt64 elr_el1; // pc
+    UInt64 spsr_el1; // cpu status
+    UInt64 esr_el1; // error reason
+    UInt64 sp_el0; // user's stack
+    UInt64 padding; // align to 16 bytes
+} ExceptionsContext;
+
+typedef enum ExceptionsType {
+    // curr el with sp0 (EL1t)
+    // usually dont happen cuz we switch to sp_el1, but just in case
+    ExceptionsSyncEl1t,
+    ExceptionsIRQEl1t,
+    ExceptionsFIQEl1t,
+    ExceptionsSErrorEl1t,
+
+    // curr el with sp1 (EL1h)
+    // exception in kernel space
+    ExceptionsSyncEl1h,
+    ExceptionsIRQEl1h,
+    ExceptionsFIQEl1h,
+    ExceptionsSErrorEl1h,
+
+    // lower EL 64-bit from userspace
+    ExceptionsSyncEl064,
+    ExceptionsIRQEl064,
+    ExceptionsFIQEl064,
+    ExceptionsSErrorEl064,
+
+    // lower EL 32-bit from userspace
+    ExceptionsSyncEl032,
+    ExceptionsIRQEl032,
+    ExceptionsFIQEl032,
+    ExceptionsSErrorEl032,
+} ExceptionsType;

Kernel/Include/Arch/GIC.h

@@ -0,0 +1,30 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+#include <Arch/Exceptions.h>
+
+enum {
+    kGICDBaseAddress = 0x08000000,
+    kGICCBaseAddress = kGICDBaseAddress + 0x10000,
+
+    // GIC Distributor (GICD), offsets from GICD base
+    kGICDCTLR = 0x000,       // control
+    kGICDTYPER = 0x004,      // controller type
+    kGICDISENABLER = 0x100,  // interrupt set-enable
+    kGICDICENABLER = 0x180,  // interrupt clear-enable
+    kGICDICPENDR = 0x280,    // interrupt clear-pending
+    kGICDIPRIORITYR = 0x400, // interrupt priority
+    kGICDITARGETSR = 0x800,  // interrupt processor targets
+
+    // GIC CPU interface (GICC), offsets from CPU interface base
+    kGICCCTLR = 0x000,  // CPU interface control
+    kGICCPMR = 0x004,   // priority mask
+    kGICCIAR = 0x00C,   // interrupt acknowledge
+    kGICCEOIR = 0x010,  // end of interrupt
+};
+
+void GICInitialize(Pointer gicdVirtBase, Pointer giccVirtBase);
+void GICEnableInterrupt(UInt32 irqID);
+Address GICDispatch(ExceptionsContext* frame, ExceptionsType type);

Kernel/Include/Arch/IO.h

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+
+static inline void IOAddressWrite32(Address address, UInt32 value) {
+    __asm__ volatile ("dsb sy" ::: "memory"); // wait till all previous writes are finished physically
+    *(volatile UInt32*)address = value;
+    __asm__ volatile ("dsb sy" ::: "memory"); // wait till my write is finished physically
+}
+
+static inline UInt32 IOAddressRead32(Address address) {
+    UInt32 value = *(volatile UInt32*)address;
+    __asm__ volatile ("dsb ld" ::: "memory"); // wait till my read is finished physically
+    return value;
+}

Kernel/Include/Arch/Timer.h

@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once 
+#include <Types.h>
+#include <Arch/Exceptions.h>
+
+enum {
+    kTimerFrequency = 1000, // 1ms
+    kTimerIRQ = 27,
+};
+
+void TimerInitialize();
+void TimerReset(UInt64 interval);   
+Address TimerHandler(ExceptionsContext* frame);
+UInt64 TimerGetCounter();

Kernel/Include/IO/Serial.h

@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+
+enum {
+    kUARTBaseAddress = 0x09000000,
+};
+
+void SerialUpdate(UInt64 address);
+Int32 SerialPutCharacter(ASCII character);
+Int32 SerialPutString(const ASCII* string);

Kernel/Include/Lib/Align.h

@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once 
+
+#include <Types.h>
+
+static inline UInt64 AlignUp64(UInt64 value, UInt64 alignment) {
+    return (value + alignment - 1) & ~(alignment - 1);
+}
+
+static inline UInt64 AlignDown64(UInt64 value, UInt64 alignment) {
+    return value & ~(alignment - 1);
+}
+
+static inline UInt32 AlignUp32(UInt32 value, UInt32 alignment) {
+    return (value + alignment - 1) & ~(alignment - 1);
+}
+
+static inline UInt32 AlignDown32(UInt32 value, UInt32 alignment) {
+    return value & ~(alignment - 1);
+}

Kernel/Include/Lib/Bytes.h

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+
+static inline UInt32 BytesSwap32(UInt32 value) {
+    return __builtin_bswap32(value);
+}
+
+static inline UInt64 BytesSwap64(UInt64 value) {
+    return __builtin_bswap64(value);
+}
+
+static inline UInt64 Merge32To64(UInt32 low, UInt32 high) {
+    return ((UInt64)high << 32) | low;
+}

Kernel/Include/Lib/Rand.h

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once 
+#include <Types.h>
+#include <Arch/Timer.h>
+
+enum {
+    kRandSeed = 0x9E3779B97F4A7C15ULL,
+    kRandMultiplier = 0xBF58476D1CE4E5B9ULL,
+    kRandIncrement = 0x94D049BB133111EBULL,
+};
+
+static inline UInt64 Rand() {
+    static _Atomic UInt64 sequence = 0;
+
+    UInt64 z = (TimerGetCounter() + kRandSeed + (++sequence));
+    z = (z ^ (z >> 30)) * kRandMultiplier;
+    z = (z ^ (z >> 27)) * kRandIncrement;
+    return z ^ (z >> 31);
+}

Kernel/Include/Lib/String.h

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+#include <Lib/VAArgs.h>
+
+Pointer MemorySet(Pointer destination, ASCII value, Size count);
+Pointer MemoryCopy(Pointer destination, const Pointer source, Size count);
+
+Int32 StringCompare(const ASCII* firstString, const ASCII* secondString);
+Int32 StringCompareWithLimit(const ASCII* firstString, const ASCII* secondString, Size limit);
+
+ASCII* StringCopy(ASCII* destination, const ASCII* source);
+ASCII* StringCopyWithLimit(ASCII* destination, const ASCII* source, Size limit);
+
+Size StringGetLength(const ASCII* string);
+const ASCII* StringFindLastOccurrenceOfCharacter(const ASCII* string, ASCII separator);
+
+Int32 StringFormatVariadic(ASCII* string, Size size, const ASCII* format, va_list args);
+Int32 StringFormat(ASCII* destination, UInt64 size, const ASCII* format, ...);
+
+Boolean StringStartsWith(const ASCII* string, const ASCII* prefix);

Kernel/Include/Lib/Stubs.h

@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+
+void* memset(void* destination, int value, Size count);

Kernel/Include/Lib/VAArgs.h

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+
+typedef __builtin_va_list va_list;
+
+#define va_start(v, l) __builtin_va_start(v, l)
+#define va_end(v)      __builtin_va_end(v)
+#define va_arg(v, l)   __builtin_va_arg(v, l)
+#define va_copy(d, s)  __builtin_va_copy(d, s)

Kernel/Include/OS/Log.h

@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+
+enum {
+    kOSLogBufferSize = 1024,
+};
+
+void OSLog(const ASCII* format, ...);

Kernel/Include/OS/Panic.h

@@ -0,0 +1,10 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+
+#include <Types.h>
+#include <Arch/Exceptions.h>
+
+__attribute__((noreturn)) void OSPanicException(ExceptionsContext* frame);
+__attribute__((noreturn)) void OSPanic(const ASCII* message);

Kernel/Include/OS/Scheduler.h

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+
+typedef enum OSTaskState {
+    OSTaskStateDead,
+    OSTaskStateRunning,
+    OSTaskStateReady,
+    OSTaskStateBlocked,
+    OSTaskStateSleeping,
+} OSTaskState;
+
+typedef struct OSProcess {
+    UInt64 id;
+    OSTaskState state;
+    Address* l0Table;
+    Address heapStart;
+    Address heapCurrent;
+    struct OSProcess* parent;
+    ASCII name[32];
+} OSProcess;
+
+typedef struct OSTask {
+    Address stackPointer;
+    struct OSTask* next;
+    UInt32 id;
+    UInt32 sleepTicks;
+    OSTaskState state;
+    Address kernelStackTop;
+    Pointer kernelStackBase;
+    OSProcess* process;
+    Int32 waitingForProcessId;
+} OSTask;
+
+enum {
+    kOSSchedulerTaskStackSize = 16 * 1024,
+    kOSSchedulerExceptionNumber = 0xF0F0
+};
+
+void SchedulerInitialize();
+OSTask* SchedulerSpawn(void(*entryPoint)(), OSProcess* owner, Boolean isUser, Address fixedUserStackAddress);
+Address SchedulerNext(Address stackPointer);
+void SchedulerYield(UInt64 ticks);

Kernel/Include/Types.h

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+
+#if defined(NDEBUG) || defined(__OPTIMIZE__)
+    #define IS_RELEASE 1
+#else
+    #define IS_RELEASE 0
+#endif
+
+typedef unsigned char      UInt8;
+typedef unsigned short     UInt16;
+typedef unsigned int       UInt32;
+typedef unsigned long long UInt64;
+typedef unsigned long long UInt;
+
+typedef void* Pointer;
+typedef UInt Address;
+typedef UInt32 Address32;
+typedef UInt8* BytePointer;
+typedef UInt8* MemoryPointer;
+
+typedef signed char        Int8;
+typedef signed short       Int16;
+typedef signed int         Int32;
+typedef signed long long   Int64;
+typedef int Int;
+
+typedef UInt64 Size;
+typedef char ASCII;
+
+typedef _Bool Boolean;

Kernel/Include/VM/Heap.h

@@ -0,0 +1,27 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+
+enum {
+    kHeapSizePages = 1024,
+    kHeapBlockHeaderMagic = 0x43555445, // CUTE
+    kKernelHeapStart = 0xFFFFFFFFC0000000
+};
+
+static inline Address VMPhysToHeap(Address phys) { return phys + kKernelHeapStart; }
+static inline Address VMHeapToPhys(Address heap) { return heap - kKernelHeapStart; }
+
+typedef struct  __attribute__((aligned(16))) VMHeapBlockHeader {
+    UInt64 magic;
+    struct VMHeapBlockHeader* next;
+    struct VMHeapBlockHeader* previous;
+    UInt64 size;
+    Boolean isFree;
+} VMHeapBlockHeader;
+
+void HeapInitialize();
+Pointer HeapAllocate(Size size);
+void HeapFree(Pointer pointer);
+Pointer HeapResize(Pointer pointer, Size newSize);

Kernel/Include/VM/PMM.h

@@ -0,0 +1,35 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+
+enum {
+    kVMPageSize = 4096,
+    kVMBlocksPerByte = 8,
+    kVMMaxReservedRegions = 256,
+    kPMMReservedRegionCount = 3,
+};
+
+typedef struct {
+    UInt64 base;
+    Size size;
+} VMMemoryRegion;
+
+typedef struct {
+    VMMemoryRegion GICD;
+    VMMemoryRegion GICC;
+} GICRegion;
+
+
+typedef struct {
+    VMMemoryRegion totalRAM;
+    VMMemoryRegion reserved[kVMMaxReservedRegions];
+    UInt32 reservedCount;
+    VMMemoryRegion UART;
+    GICRegion GIC;
+} VMBootMemoryMap;
+
+void PMMInitialize(VMBootMemoryMap* bootMap);
+Pointer PMMAllocatePage();
+void PMMFreePage(Address address);

Kernel/Include/VM/VMM.h

@@ -0,0 +1,62 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#pragma once
+#include <Types.h>
+#include <VM/PMM.h>
+#include "../Common/bootinfo.h"
+
+enum VMPTEFlags {
+    // Descriptor type (bits [1:0])
+    kPTEValid      = (1ULL << 0),  // 1 = Valid (fault if 0)
+    kPTETable      = (1ULL << 1),  // For L0/L1/L2: table descriptor (bits[1:0]=11)
+    kPTEPage       = (1ULL << 1),  // For L3: page descriptor (same bit, bits[1:0]=11)
+
+    // MAIR attribute index (bits [4:2])
+    kPTENormalMem  = (0ULL << 2),  // AttrIndx 0 → MAIR[7:0] = 0xFF (Normal, WB Cacheable)
+    kPTEDeviceMem  = (1ULL << 2),  // AttrIndx 1 → MAIR[15:8] = 0x00 (Device-nGnRnE)
+
+    // Leaf entry AP[2:1] (bits [7:6]):
+    //   AP[1] (bit 6): 0 = EL0 blocked, 1 = EL0 allowed
+    //   AP[2] (bit 7): 0 = Read/Write, 1 = Read-only
+    kPTEUser       = (1ULL << 6),  // AP[1]=1: allow EL0 access
+    kPTEAccessRW   = (0ULL << 7),  // AP[2]=0: writable for permitted levels
+    kPTEAccessRO   = (1ULL << 7),  // AP[2]=1: read-only for all levels
+
+    // Table descriptor APTable[1:0] (bits [62:61]):
+    //   00 = no restriction, 01 = block EL0, 10 = reserved, 11 = read-only for all
+    kPTETableNoEL0 = (1ULL << 61), // APTable[0]=1: prevent EL0 table walk
+
+    kPTEInnerShare = (3ULL << 8),  // Inner Shareable (SMP safe)
+    kPTEAccessFlag = (1ULL << 10), // Access Flag (MUST be 1 to avoid faults)
+    kPTEPrivNX     = (1ULL << 53), // PXN: Privileged Execute Never
+    kPTEUserNX     = (1ULL << 54)  // UXN: Unprivileged Execute Never
+};
+
+enum {
+    kVMKernelVMA   = 0xFFFFFFFF80000000,
+    kHHDMOffset    = 0xFFFF888000000000,
+    kVMFbVirtBase  = 0xFFFFFFFFFC000000,
+    kKernelPhysBase = 0x40100000,
+};
+
+
+static inline Address VMKernelVirtToPhys(Address virt) {
+    return virt - 0xFFFFFFFF80100000 + kKernelPhysBase;
+}
+
+static inline Address VMPhysToHHDM(Address phys) {
+    return phys + kHHDMOffset;
+}
+
+static inline Address VMHHDMToPhys(Address virt) {
+    return virt - kHHDMOffset;
+}
+
+extern Address* gVMKernelL0Table;
+extern Address gVMKernelL0Physical;
+
+Address* VMMMapPage(Address* l0Table, Address phys, Address virt, UInt64 flags);
+void VMMUnmapPage(Address* l0Table, Address virt);
+Pointer VMMGetOrAllocatePage(Address* l0Table, Address virt, UInt64 flags);
+void VMMInitialize(VMBootMemoryMap* bootMap, Bootinfo* info);

Kernel/Source/Arch/DTB.c

@@ -0,0 +1,116 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <Arch/DTB.h>
+#include <OS/Panic.h>
+#include <Lib/Bytes.h>
+#include <Lib/Align.h>
+#include <Lib/String.h>
+#include <VM/PMM.h>
+
+void DTBParse(Pointer dtb, VMBootMemoryMap* bootMap) {
+    FDTHeader* header = (FDTHeader*)dtb;
+    if (BytesSwap32(header->magic) != kFDTHeaderMagic) {
+        OSPanic("Invalid DTB magic");
+    }
+
+    UInt32 index = bootMap->reservedCount;
+    bootMap->reserved[index].base = (Address)dtb;
+    bootMap->reserved[index].size = BytesSwap32(header->totalSize);
+    bootMap->reservedCount++;
+
+    UInt32 offStruct = BytesSwap32(header->offDtStruct);
+    UInt32 offStrings = BytesSwap32(header->offDtStrings);
+
+    BytePointer structs = (BytePointer)dtb + offStruct;
+    ASCII* strings = (ASCII*)dtb + offStrings;
+
+    ASCII* currentNode = "";
+    UInt32 currentDepth = 0;
+    UInt32 reservedMemoryDepth = 0;
+    Boolean inReservedMemory = false;
+
+    while (true) {
+        if (bootMap->reservedCount + kPMMReservedRegionCount >= kVMMaxReservedRegions) {
+            OSPanic("Too many reserved memory regions!"); // should never occur but jic
+        }
+        UInt32 token = BytesSwap32(*(UInt32*)structs);
+        structs += 4;
+
+        switch (token) {
+            case FDTTokenBeginNode: {
+                currentDepth++;
+                currentNode = (ASCII*)structs;
+
+                if (StringStartsWith(currentNode, "reserved-memory")) {
+                    inReservedMemory = true;
+                    reservedMemoryDepth = currentDepth;
+                }
+
+                UInt32 nameLength = StringGetLength(currentNode);
+                structs += (nameLength + 1);
+                structs = (BytePointer)AlignUp64((Address)structs, 4);
+                break;
+            }
+            case FDTTokenProperty: {
+                UInt32 propertyLength = BytesSwap32(*(UInt32*)structs);
+                UInt32 nameOffset = BytesSwap32(*(UInt32*)(structs + 4));
+                structs += 8;
+                ASCII* propertyName = strings + nameOffset;
+
+                if (StringCompare(propertyName, "reg") == 0) {
+                    if (StringStartsWith(currentNode, "memory")) {
+                        UInt32* cells = (UInt32*)structs;
+                        Address base = Merge32To64(BytesSwap32(cells[1]), BytesSwap32(cells[0]));
+                        Size size = Merge32To64(BytesSwap32(cells[3]), BytesSwap32(cells[2]));
+
+                        bootMap->totalRAM.base = base;
+                        bootMap->totalRAM.size = size;
+                    }
+                    else if (inReservedMemory && currentDepth > reservedMemoryDepth) {
+                        UInt32* cells = (UInt32*)structs;
+                        Address base = Merge32To64(BytesSwap32(cells[1]), BytesSwap32(cells[0]));
+                        Size size = Merge32To64(BytesSwap32(cells[3]), BytesSwap32(cells[2]));
+
+                        UInt32 index = bootMap->reservedCount;
+                        bootMap->reserved[index].base = base;
+                        bootMap->reserved[index].size = size;
+                        bootMap->reservedCount++;
+                    }
+                    else if (StringStartsWith(currentNode, "pl011")) {
+                        UInt32* cells = (UInt32*)structs;
+                        bootMap->UART.base = Merge32To64(BytesSwap32(cells[1]), BytesSwap32(cells[0]));
+                        bootMap->UART.size = Merge32To64(BytesSwap32(cells[3]), BytesSwap32(cells[2]));
+                    }
+                    else if (StringStartsWith(currentNode, "intc")) {
+                        UInt32* cells = (UInt32*)structs;
+
+                        bootMap->GIC.GICD.base = Merge32To64(BytesSwap32(cells[1]), BytesSwap32(cells[0]));
+                        bootMap->GIC.GICD.size = Merge32To64(BytesSwap32(cells[3]), BytesSwap32(cells[2]));
+
+                        bootMap->GIC.GICC.base = Merge32To64(BytesSwap32(cells[5]), BytesSwap32(cells[4]));
+                        bootMap->GIC.GICC.size = Merge32To64(BytesSwap32(cells[7]), BytesSwap32(cells[6]));
+                    }
+                }
+
+                structs += propertyLength;
+                structs = (BytePointer)AlignUp64((Address)structs, 4);
+                break;
+            }
+
+            case FDTTokenEndNode: {
+                if (inReservedMemory && currentDepth == reservedMemoryDepth) {
+                    inReservedMemory = false;
+                }
+                currentDepth--;
+                break;
+            }
+
+            case FDTTokenNOP: continue;
+            case FDTTokenEnd: return;
+            default:
+                OSPanic("Invalid DTB token");
+        }
+    }
+
+}

Kernel/Source/Arch/Exceptions.c

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <Arch/Exceptions.h>
+#include <Arch/GIC.h>
+#include <OS/Panic.h>
+#include <OS/Scheduler.h>
+
+Address ExceptionsHandler(ExceptionsContext* frame, ExceptionsType type) {
+    if (type == ExceptionsIRQEl1h || type == ExceptionsIRQEl064) return GICDispatch(frame, type);
+    if (type == ExceptionsSyncEl1h || type == ExceptionsSyncEl064) {
+        UInt32 esr = frame->esr_el1;
+        UInt32 class = (esr >> 26) & 0x3F;
+        UInt32 syndrome = esr & 0x1FFFFFF;
+
+        if (class == 0x11 || class == 0x15) {
+            if (syndrome == kOSSchedulerExceptionNumber) {
+                return SchedulerNext((Address)frame);
+            }
+        }
+    }
+    OSPanicException(frame);
+}

Kernel/Source/Arch/GIC.c

@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <Arch/GIC.h>
+#include <Arch/Exceptions.h>
+#include <Arch/Timer.h>
+#include <OS/Log.h>
+
+static volatile UInt32* GICD = nullptr;
+static volatile UInt32* GICC = nullptr;
+
+void GICInitialize(Pointer gicdVirtBase, Pointer giccVirtBase) {
+    GICD = (volatile UInt32*)gicdVirtBase;
+    GICC = (volatile UInt32*)giccVirtBase;
+
+    GICD[kGICDCTLR / 4] = 0; // disable Distributor (gicd)
+    UInt32 typer = GICD[kGICDTYPER / 4]; // how many interrupts are supported
+    UInt32 maxIRQS = 32 * ((typer & 0x1F) + 1); // total number of interrupts
+    OSLog("GIC: maxIRQS: %d\n", maxIRQS);
+
+    for (UInt32 i = 0; i < maxIRQS / 32; i++) {
+        GICD[kGICDICENABLER / 4 + i] = 0xFFFFFFFF; // clear enable
+        GICD[kGICDICPENDR / 4 + i] = 0xFFFFFFFF; // clear pending
+    }
+
+    for (UInt32 i = 0; i < maxIRQS / 4; i++) {
+        GICD[kGICDIPRIORITYR / 4 + i] = 0xA0A0A0A0; // set priority 0xA0 for all interrupts
+    }
+
+    for (UInt32 i = 8; i < maxIRQS / 4; i++) {
+        GICD[kGICDITARGETSR / 4 + i] = 0x01010101; // set interrupts id >= 32 for CPU 0
+    }
+
+    GICD[kGICDCTLR / 4] = 1; // enable Distributor (gicd)
+    
+    GICC[kGICCCTLR / 4] = 0; // disable cpu interface 
+    GICC[kGICCPMR / 4] = 0xFF; // set lowest priority (accept all interrupts)
+    GICC[kGICCCTLR / 4] = 1; // enable CPU interface (gicc)
+    
+    OSLog("GICv2 initialized.\n");
+}
+
+void GICEnableInterrupt(UInt32 irqID) {
+    UInt32 regOffset = irqID / 32;
+    UInt32 bitMask = 1 << (irqID % 32);
+
+    GICD[kGICDISENABLER / 4 + regOffset] = bitMask;
+}
+
+UInt32 GICCReadIAR(void) {
+    return GICC[kGICCIAR / 4];
+}
+
+void GICCWriteEOIR(UInt32 irqID) {
+    GICC[kGICCEOIR / 4] = irqID;
+}
+
+Address GICDispatch(ExceptionsContext* frame, ExceptionsType type) {
+    if (type != ExceptionsIRQEl1h && type != ExceptionsIRQEl064) return (Address)frame;
+    UInt32 irqID = GICCReadIAR() & 0x3FF;
+    if (irqID == 1023) return (Address)frame; // spurious interrupt
+
+
+    Address newStackPointer = (Address)frame;
+
+    if (irqID == kTimerIRQ) {
+        newStackPointer = TimerHandler(frame);
+    }
+
+    GICCWriteEOIR(irqID);
+    return newStackPointer;
+}

Kernel/Source/Arch/Timer.c

@@ -0,0 +1,31 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <Arch/Timer.h>
+#include <Arch/GIC.h>
+#include <OS/Scheduler.h>
+#include <Arch/Exceptions.h>
+
+static volatile UInt64 sTimerCounter = 0;
+
+void TimerInitialize() {
+    GICEnableInterrupt(kTimerIRQ);
+    TimerReset(kTimerFrequency);
+}
+
+void TimerReset(UInt64 interval) {
+    UInt64 frequency;
+    __asm__ volatile ("mrs %0, cntfrq_el0" : "=r"(frequency));
+    __asm__ volatile ("msr cntv_tval_el0, %0" :: "r"(frequency /interval));
+    __asm__ volatile ("msr cntv_ctl_el0, %0" :: "r"((UInt64)1));
+}
+
+Address TimerHandler(ExceptionsContext* frame) {
+    sTimerCounter++;
+    TimerReset(kTimerFrequency);
+    return SchedulerNext((Address)frame);
+}
+
+UInt64 TimerGetCounter() {
+    return sTimerCounter;
+}

Kernel/Source/Arch/dtb.swift

@@ -1,81 +0,0 @@
-struct FDTHeader {
-    let magic: UInt32            // 0xd00dfeed
-    let totalsize: UInt32
-    let off_dt_struct: UInt32
-    let off_dt_strings: UInt32
-    let off_mem_rsvmap: UInt32
-    let version: UInt32
-    let last_comp_version: UInt32
-    let boot_cpuid_phys: UInt32
-    let size_dt_strings: UInt32
-    let size_dt_struct: UInt32
-}
-
-struct FDTProperty {
-    let len: UInt32
-    let nameoff: UInt32
-}
-
-enum FDTToken: UInt32 {
-    case beginNode = 0x1
-    case endNode   = 0x2
-    case prop      = 0x3
-    case nop       = 0x4
-    case end       = 0x9
-}
-
-extension UInt32 {
-    var fromBe: UInt32 {
-        return self.byteSwapped
-    }
-}
-
-func alignUp(_ value: Int, to: Int) -> Int {
-    return (value + to - 1) & ~(to - 1)
-}
-
-let kFDTHeaderMagic = 0xd00dfeed
-
-func parseDTB(at pointer: UnsafeRawPointer) {
-    let header = pointer.bindMemory(to: FDTHeader.self, capacity: 1).pointee
-    guard header.magic.byteSwapped == kFDTHeaderMagic else {
-        return
-    }
-
-    let structOffset = Int(header.off_dt_struct.byteSwapped)
-    let stringOffset = Int(header.off_dt_strings.byteSwapped)
-
-    var structBase = pointer.advanced(by: structOffset)
-    let stringsBase = pointer.advanced(by: stringOffset)
-
-    var finished = false
-    while !finished {
-        let rawToken = structBase.load(as: UInt32.self).byteSwapped
-        structBase = structBase.advanced(by: 4)
-
-        if let token = FDTToken(rawValue: rawToken) {
-            switch token {
-                case .beginNode:
-                    let namePointer = structBase.assumingMemoryBound(to: UInt8.self)
-                    let name = String(cString: namePointer)
-                    let nameLength = name.utf8.count + 1
-                    structBase = structBase.advanced(by: alignUp(nameLength, to: 4))
-                case .prop:
-                    let propertyHeader = structBase.load(as: FDTProperty.self)
-                    let dataLength = Int(propertyHeader.len.byteSwapped)
-                    let nameOffset = Int(propertyHeader.nameoff.byteSwapped)
-
-                    let namePointer = stringsBase.advanced(by: nameOffset).assumingMemoryBound(to: UInt8.self)
-
-                    structBase = structBase.advanced(by: 8) // skip header
-                    structBase = structBase.advanced(by: alignUp(dataLength, to: 4)) // skip data for now
-                case .endNode:
-                    continue
-                case .nop:
-                    continue
-                case .end:
-                    finished = true
-            }
-        }
-    }
-}

Kernel/Source/Arch/entry.S

@@ -1,7 +1,124 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
 .section .text.boot, "ax"
 .global _start
 
 _start:
-    bl kmain
+    // disable interrupts
-.hang:
+    msr daifset, #3
-    b .hang
+    // save phys addr of Bootinfo* in x0 to x20
+    mov x20, x0
+
+    // get phys addr of tables
+    adrp x0, early_ttbr0_l0
+    adrp x1, early_ttbr1_l0 
+
+    // memzero that tables (4 tables = 16 KB)
+    mov x2,  #16384
+    mov x3, x0
+1:  str xzr, [x3], #8
+    subs x2, x2, #8
+    b.ne 1b
+
+    // set up ttbr0 (identity map of 512 gb)
+    adrp x0, early_ttbr0_l0
+    adrp x1, early_ttbr1_l0
+
+    // early_ttbr0_l0[0] -> early_ttbr0_l1 (Valid + Table = 0x3)
+    ldr x2, =0x3
+    orr x3, x1, x2
+    str x3, [x0, #0]
+
+    // fill l1 table with 512 entrie
+    // flags 0x701 = valid + block + accessflag + innershareable + normalram
+    mov x2, xzr 
+    mov x3, #512
+    ldr x4, =0x701
+    mov x6, #(1 << 30)
+2:  orr x5, x2, x4
+    str x5, [x1], #8    // early_ttbr0_l1[i] = base | flags
+    add x2, x2, x6
+    subs x3, x3, #1
+    b.ne 2b
+
+    // set up ttbr1 (HH: 0xFFFFFFFF80000000)
+    adrp x0, early_ttbr1_l0
+    adrp x1, early_ttbr1_l1
+
+    // early_ttbr1_l0[511] -> early_ttbr1_l1 (Valid + Table = 0x3)
+    ldr x2, =0x3
+    orr x3, x1, x2
+    mov x4, #(511 * 8)
+    str x3, [x0, x4]
+
+    // determine where is kernel rn
+    adr x2, _start      // curr pc in absoule addr
+    lsr x2, x2, #30     // leave only number of gig
+    lsl x2, x2, #30     // return it in absoule addr
+
+    // map that at 510 (0xFFFFFFFF80000000)
+    ldr x3, =0x701      // flags
+    orr x2, x2, x3
+    mov x4, #(510 * 8)
+    str x2, [x1, x4]    // early_ttbr1_l1[510] = base | flags
+
+    // enable MMU (MAIR, TCR, SCTLR)
+    // see Kernel/Include/Arch/CPU.h for explanaition
+    ldr x2, =((0xFF << 0) | (0x00 << 8))
+    msr mair_el1, x2
+
+    ldr x2, =((16 << 0) | (16 << 16) | (0 << 14) | (2 << 30) | (3 << 28) | (3 << 12) | (5 << 32)) 
+    msr tcr_el1, x2
+
+    adrp x0, early_ttbr0_l0
+    adrp x1, early_ttbr1_l0
+    msr ttbr0_el1, x0
+    msr ttbr1_el1, x1
+    dsb ish
+    isb
+
+    mrs x2, sctlr_el1
+    ldr x3, =0x1005
+    orr x2, x2, x3
+    msr sctlr_el1, x2
+    isb
+
+    ldr x2, =higher_half_jump
+    br x2
+
+higher_half_jump:
+    ldr x3, =_boot_stack_top
+    mov sp, x3
+
+    // clean .bss
+    ldr x1, =__bss_start
+    ldr x2, =__bss_end
+    cbz x1, 4f
+    cmp x1, x2
+    b.eq 4f
+3:  str xzr, [x1], #8
+    cmp x1, x2
+    b.lt 3b
+4:
+    bl ExceptionsVectorsInit
+    
+    mov x0, x20 // return phys of Bootinfo* in x20
+  
+    bl KernelMain
+
+halt:
+    wfi
+    b halt
+
+.section .data
+.align 12
+early_ttbr0_l0: .fill 4096, 1, 0
+early_ttbr0_l1: .fill 4096, 1, 0
+early_ttbr1_l0: .fill 4096, 1, 0
+early_ttbr1_l1: .fill 4096, 1, 0
+
+.section .bss
+.align 16
+    .skip 16384
+_boot_stack_top:

Kernel/Source/Arch/vectors.S

@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+.macro ventry type
+    .align 7
+    sub sp, sp, #288 // save 288 bytes of stack
+    stp x0, x1, [sp, #0] // move stack
+    mov x1, #\type // move type to x1
+    b ExceptionsTrapEntry
+.endm
+
+.section .text.vectors
+.align 11
+.global vectors
+ExceptionsVectorsTable:
+    // EL1t (curr EL with SP0)
+    ventry 0 // Sync
+    ventry 1 // IRQ
+    ventry 2 // FIQ
+    ventry 3 // SError
+
+    // EL1h (curr EL with SP1)
+    ventry 4 // Sync
+    ventry 5 // IRQ
+    ventry 6 // FIQ
+    ventry 7 // SError
+
+    // EL0 (lower EL 64-bit from userspace)
+    ventry 8 // Sync
+    ventry 9 // IRQ
+    ventry 10 // FIQ
+    ventry 11 // SError
+
+    // EL0 (lower EL 32-bit from userspace)
+    ventry 12; ventry 13; ventry 14; ventry 15
+
+ExceptionsTrapEntry:
+    stp x2, x3, [sp, #16 * 1]
+    stp x4, x5, [sp, #16 * 2]
+    stp x6, x7, [sp, #16 * 3]
+    stp x8, x9, [sp, #16 * 4]
+    stp x10, x11, [sp, #16 * 5]
+    stp x12, x13, [sp, #16 * 6]
+    stp x14, x15, [sp, #16 * 7]
+    stp x16, x17, [sp, #16 * 8]
+    stp x18, x19, [sp, #16 * 9]
+    stp x20, x21, [sp, #16 * 10]
+    stp x22, x23, [sp, #16 * 11]
+    stp x24, x25, [sp, #16 * 12]
+    stp x26, x27, [sp, #16 * 13]
+    stp x28, x29, [sp, #16 * 14]
+
+    mrs x21, elr_el1
+    mrs x22, spsr_el1
+    mrs x23, esr_el1
+    mrs x24, sp_el0
+
+    stp x30, x21, [sp, #16 * 15]
+    stp x22, x23, [sp, #16 * 16]
+    stp x24, xzr, [sp, #16 * 17]
+
+    mov x0, sp
+    bl ExceptionsHandler
+    mov sp, x0
+
+    ldp x24, xzr, [sp, #16 * 17]
+    msr sp_el0, x24
+
+    ldp x22, x23, [sp, #16 * 16]
+    msr spsr_el1, x22
+
+    ldp x30, x21, [sp, #16 * 15]
+    msr elr_el1, x21
+
+    ldp x28, x29, [sp, #16 * 14]
+    ldp x26, x27, [sp, #16 * 13]
+    ldp x24, x25, [sp, #16 * 12]
+    ldp x22, x23, [sp, #16 * 11]
+    ldp x20, x21, [sp, #16 * 10]
+    ldp x18, x19, [sp, #16 * 9]
+    ldp x16, x17, [sp, #16 * 8]
+    ldp x14, x15, [sp, #16 * 7]
+    ldp x12, x13, [sp, #16 * 6]
+    ldp x10, x11, [sp, #16 * 5]
+    ldp x8, x9, [sp, #16 * 4]
+    ldp x6, x7, [sp, #16 * 3]
+    ldp x4, x5, [sp, #16 * 2]
+    ldp x2, x3, [sp, #16 * 1]
+    ldp x0, x1, [sp, #0]
+
+    add sp, sp, #288
+    eret
+
+.global ExceptionsVectorsInit
+ExceptionsVectorsInit:
+    adr x0, ExceptionsVectorsTable
+    msr vbar_el1, x0
+    isb
+    ret

Kernel/Source/IO/Serial.c

@@ -0,0 +1,34 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <IO/Serial.h>
+#include <Arch/IO.h>
+#include <Arch/CPU.h>
+
+static UInt64 sUARTAddress = kUARTBaseAddress;
+
+void SerialUpdate(UInt64 address) {
+    sUARTAddress = address;
+}
+
+Int32 SerialPutCharacter(ASCII character) {
+    // TXFF -- TRansmit FIFO Full for PL011 is 5 bit of FR reg (0x18)
+    UInt64 uartFR = sUARTAddress + 0x18;
+
+    while ((IOAddressRead32(uartFR) & (1 << 5)) != 0)  {
+        CPUYield();
+    }
+
+    IOAddressWrite32(sUARTAddress, character);
+    return character;
+}
+
+Int32 SerialPutString(const ASCII* string) {
+    Int i = 0;
+    while (string[i] != '\0') {
+        SerialPutCharacter(string[i]);
+        i++;
+    }
+
+    return i;
+}

Kernel/Source/IO/uart.swift

@@ -1,20 +0,0 @@
-let kUARTBaseAddress: UInt = 0x09000000 // TODO: Make it dynamic by parsion DTB
-
-@_cdecl("putchar")
-@discardableResult
-public func _serialPutchar(_ char: Int32) -> Int32 {
-    let uartFR: UInt = kUARTBaseAddress + 0x18// TXFF -- TRansmit FIFO Full for PL011 is 5 bit of FR reg (0x18)
-
-    while (mmio_read32(uartFR) & (1 << 5)) != 0 {
-        // i love pizza btw
-    }
-    
-    mmio_write32(UInt(kUARTBaseAddress), UInt32(char))
-    return char
-}
-
-public func kprint(_ message: StaticString) {
-    for i in 0..<message.utf8CodeUnitCount {
-        _serialPutchar(Int32(message.utf8Start[i]))
-    }
-}

Kernel/Source/KernelMain.c

@@ -0,0 +1,41 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include "../Common/bootinfo.h"
+#include <Arch/DTB.h>
+#include <Arch/Timer.h>
+#include <Arch/CPU.h>
+#include <Arch/GIC.h>
+#include <IO/Serial.h>
+#include <VM/PMM.h>
+#include <VM/VMM.h>
+#include <VM/Heap.h>
+#include <OS/Log.h>
+#include <OS/Panic.h>
+#include <OS/Scheduler.h>
+
+void KernelMain(Bootinfo* bootinfo) {
+    OSLog("Kernel started.\n");
+    if (bootinfo->magic != BOOTINFO_MAGIC) {
+        OSPanic("Invalid bootinfo magic");
+    }
+
+    VMBootMemoryMap bootMap = {0};
+
+    bootMap.reservedCount = 0;
+    DTBParse(bootinfo->dtb, &bootMap);
+    PMMInitialize(&bootMap);
+    VMMInitialize(&bootMap, bootinfo);
+    SerialUpdate(VMPhysToHHDM(bootMap.UART.base));
+    HeapInitialize();
+
+    GICInitialize(
+        (Pointer)VMPhysToHHDM(bootMap.GIC.GICD.base),
+        (Pointer)VMPhysToHHDM(bootMap.GIC.GICC.base)
+    );
+    TimerInitialize();
+    CPUEnableInterrupts();
+    SchedulerInitialize();
+
+    OSLog("Kernel initialized.\n");
+}

Kernel/Source/Lib/String.c

@@ -0,0 +1,186 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <Lib/String.h>
+#include <Lib/VAArgs.h>
+
+static void BufferAdd(ASCII* buffer, Size bufferSize, Size* written, ASCII character) {
+    if (*written + 1 < bufferSize) {
+        buffer[*written] = character;
+    }
+    (*written)++;
+}
+
+Pointer MemorySet(Pointer destination, ASCII value, Size count) {
+    BytePointer savedDestination = (BytePointer) destination;
+    while (count--) {
+        *savedDestination++ = (UInt8) value;
+    }
+    return destination;
+}
+
+Pointer MemoryCopy(Pointer destination, const Pointer source, Size count) {
+    BytePointer destinationBuffer = (BytePointer) destination;
+    const UInt8* sourceBuffer = (const UInt8*) source;
+
+    while (count >= 8) {
+        *(UInt64*) destinationBuffer = *(const UInt64*) sourceBuffer;
+        destinationBuffer += 8;
+        sourceBuffer += 8;
+        count -= 8;
+    }
+
+    while (count > 0) {
+        *destinationBuffer++ = *sourceBuffer++;
+        count--;
+    }
+
+    return destination;
+}
+
+Int32 StringCompare(const ASCII* firstString, const ASCII* secondString) {
+    while (*firstString && (*firstString == *secondString)) {
+        firstString++;
+        secondString++;
+    }
+    return *(const UInt8*) firstString - *(const UInt8*) secondString;
+}
+
+Int32 StringCompareWithLimit(const ASCII* firstString, const ASCII* secondString, Size limit) {
+    while (limit > 0) {
+        if (*firstString != *secondString) return *(const UInt8*) firstString - *(const UInt8*) secondString;
+        if (*firstString == '\0') return 0;
+        firstString++;
+        secondString++;
+        limit--;
+    }
+    
+    return 0;
+}
+
+ASCII* StringCopy(ASCII* destination, const ASCII* source) {
+    ASCII* saved = destination;
+    while (*source) *destination++ = *source++;
+    *destination = 0;
+    return saved;
+}
+
+ASCII* StringCopyWithLimit(ASCII* destination, const ASCII* source, Size limit) {
+    ASCII* saved = destination;
+    while (*source && limit > 0) {
+        *destination++ = *source++;
+        limit--;
+    }
+    while (limit > 0) {
+        *destination++ = 0;
+        limit--;
+    }
+    return saved;
+}
+
+Size StringGetLength(const ASCII* string) {
+    Size result = 0;
+    for (result = 0; string[result]; result++);
+    return result;
+}
+
+const ASCII* StringFindLastOccurrenceOfCharacter(const ASCII* string, ASCII separator) {
+    const ASCII* lastSeparator = 0;
+    do {
+        if (*string == separator) lastSeparator = string;
+    } while (*string++);
+
+    return lastSeparator;
+}
+
+Int32 StringFormatVariadic(ASCII* string, Size size, const ASCII* format, va_list args) {
+    Size written = 0;
+    for (Size i = 0; format[i] != '\0'; i++) {
+        if (format[i] == '%') {
+            i++;
+            if (format[i] == '\0') break;
+            switch (format[i]) {
+                case 's': {
+                    const ASCII* vaArgString = va_arg(args, const ASCII*);
+                    if (!vaArgString) vaArgString = "(null)";
+                    while (*vaArgString) BufferAdd(string, size, &written, *vaArgString++);
+                    break;
+                }
+                case 'c': {
+                    ASCII character = (ASCII)va_arg(args, Int);
+                    BufferAdd(string, size, &written, character);
+                    break;
+                }
+                case 'd': {
+                    Int64 number = va_arg(args, Int);
+                    if (number < 0) {
+                        BufferAdd(string, size, &written, '-');
+                        number = -number;
+                    }
+
+                    UInt64 unsignedNumber = (UInt64)number;
+                    ASCII tempBuffer[32];
+                    Size position = 0;
+
+                    if (unsignedNumber == 0) tempBuffer[position++] = '0';
+                    while (unsignedNumber > 0) {
+                        tempBuffer[position++] = (ASCII)((unsignedNumber % 10) + '0');
+                        unsignedNumber /= 10;
+                    }
+
+                    while (position > 0) BufferAdd(string, size, &written, tempBuffer[--position]);
+                    break;
+                }
+                case 'x':
+                case 'X': {
+                    UInt64 unsignedNumber = va_arg(args, UInt64);
+                    UInt8 padding = (format[i] == 'X') ? 16 : 0;
+
+                    ASCII tempBuffer[32];
+                    Size position = 0;
+                    static const ASCII kHexDigits[] = "0123456789ABCDEF";
+
+                    if (unsignedNumber == 0 && padding == 0) tempBuffer[position++] = '0';
+                    while (unsignedNumber > 0) {
+                        tempBuffer[position++] = kHexDigits[unsignedNumber % 16];
+                        unsignedNumber /= 16;
+                    }
+
+                    while (position < (Size)padding) tempBuffer[position++] = '0';
+                    while (position > 0) BufferAdd(string, size, &written, tempBuffer[--position]);
+                    break;
+                }
+                case '%': {
+                    BufferAdd(string, size, &written, '%');
+                    break;
+                }
+                default: {
+                    BufferAdd(string, size, &written, '%');
+                    BufferAdd(string, size, &written, format[i]);
+                    break;
+                }
+            }
+        } else {
+            BufferAdd(string, size, &written, format[i]);
+        }
+    }
+
+    if (size > 0) {
+        if (written < size) string[written] = '\0';
+        else string[size - 1] = '\0';
+    }
+
+    return (Int32)written;
+}
+
+Int32 StringFormat(ASCII* destination, UInt64 size, const ASCII* format, ...) {
+    va_list args;
+    va_start(args, format);
+    Int32 returnValue = StringFormatVariadic(destination, size, format, args);
+    va_end(args);
+    return returnValue;
+}
+
+Boolean StringStartsWith(const ASCII* string, const ASCII* prefix) {
+    return StringCompareWithLimit(string, prefix, StringGetLength(prefix)) == 0;
+}

Kernel/Source/Lib/Stubs.c

@@ -0,0 +1,9 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <Lib/Stubs.h>
+#include <Lib/String.h>
+
+void* memset(void* destination, int value, Size count) {
+    return MemorySet(destination, value, count);
+}

Kernel/Source/OS/Log.c

@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <OS/Log.h>
+#include <Lib/String.h>
+#include <Lib/VAArgs.h>
+#include <IO/Serial.h>
+
+void OSLog(const ASCII* format, ...) {
+    ASCII buffer[kOSLogBufferSize];
+
+    va_list args;
+    va_start(args, format);
+    StringFormatVariadic(buffer, kOSLogBufferSize, format, args);
+    va_end(args);
+
+    SerialPutString(buffer);
+}

Kernel/Source/OS/Panic.c

@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <OS/Panic.h>
+#include <OS/Log.h>
+#include <Arch/CPU.h>
+#include <Lib/Rand.h>
+
+static const ASCII* GetExceptionClassString(UInt32 class) {
+    switch (class) {
+        case 0x00: return "Unknown reason";
+        case 0x01: return "Trapped WFI | WFE instruction";
+        case 0x07: return "Trapped SIMD | FP instruction";
+        case 0x11: return "SVC from EL1";
+        case 0x15: return "SVC from EL0";
+        case 0x20: return "Instruction abort (LoEL)"; // User Execute Fault
+        case 0x21: return "Instruction abort (CurrEL)"; // Kernel Execute Fault
+        case 0x22: return "PC Alignment Fault"; // Jumped to a misaligned address
+        case 0x24: return "Data abort (LoEL)"; // User Memory Fault
+        case 0x25: return "Data abort (CurrEL)"; // Kernel Memory Fault
+        case 0x26: return "SP Alignment Fault"; // SP must be 16-byte aligned
+        case 0x3C: return "Breakpoint";
+        default: return "Reserved";
+    }
+}
+
+static const ASCII* sFunMessages[] = {
+    "Execution finished abnormally with code: 0x_x",
+    "Ah shit, here we go again",
+    "It's definitely your fault.",
+    "No more Roblox!",
+    "Call your mom 4 help!",
+    "2bad4u",
+    "Touch grass",
+    "Skill issue",
+    "You should just go outside actually",
+    "Perfect opportunity to take a shower",
+    "404 not found",
+    "Windows is locked! Password:___ Time left: 5:45:41",
+    "\"NAM PIZDA\": hackers dropped our registry",
+    "That's all, folks!",
+    "rip",
+};
+
+__attribute__((noreturn)) static void Halt() {
+    while (true) {
+        CPUDisableInterrupts();
+        CPUWaitForInterrupt();
+    }
+}
+
+static void PrintSeparator() {
+    OSLog("--------------------------------\n");
+}
+
+static void DrawPanicHeader() {
+    OSLog("\n\n");
+    PrintSeparator();
+    OSLog("\tKernel Panic! :(\n");
+    PrintSeparator();
+    UInt64 funMessagesCount = sizeof(sFunMessages) / sizeof(sFunMessages[0]);
+    OSLog("\t%s\n", sFunMessages[Rand() % funMessagesCount]);
+    PrintSeparator();
+}
+
+static void DrawPanicFooter() {
+    PrintSeparator();
+    OSLog("\tSystem halted.\n");
+    PrintSeparator();
+}
+
+__attribute__((noreturn)) void OSPanic(const ASCII* message) {
+    DrawPanicHeader();
+    OSLog("\tReason: %s\n", message);
+    DrawPanicFooter();
+    Halt();
+}
+
+__attribute__((noreturn)) void OSPanicException(ExceptionsContext* frame) {
+    UInt32 esr = frame->esr_el1;
+    UInt32 class = (esr >> 26) & 0x3F; // Exception class (Bits 31:26)
+    UInt32 length = (esr >> 25) & 0x1; // Instruction length (Bit 25)
+    UInt32 syndrome = esr & 0x1FFFFFF; // Syndrome (Bits 24:0)
+
+    DrawPanicHeader();
+
+    OSLog("CPU Exception: %s (%d)\n", GetExceptionClassString(class), class);
+    OSLog("ESR_EL1 (Syndrome): 0x%x (%d)\n", esr, syndrome);
+    OSLog("Instruction pointer: 0x%x (%s)\n", frame->elr_el1, length ? "32-bit" : "64-bit");
+    OSLog("CPU status: 0x%x\n", frame->spsr_el1);
+
+    if (class == 0x25 || class == 0x24 || class == 0x20 || class == 0x21 ) {
+        PrintSeparator();
+        OSLog("Memory abort helper:\n");
+        PrintSeparator();
+
+        UInt64 far = CPUGetFAR();
+        OSLog("Faulting address: 0x%x\n", far);
+
+        UInt32 wnr = (syndrome >> 6) & 0x1;
+        if (class == 0x24 || class == 0x25) {
+            OSLog("[W] Caused by %s\n", wnr ? "WRITE" : "READ");
+        } else {
+            OSLog("[T] Tried to execute code from NX/Invalid memory\n");
+        }
+
+
+        UInt32 dfsc = syndrome & 0x3F;
+        switch (dfsc & 0b111100) {
+            case 0b000000: OSLog("[P] Reason: Address size fault (Bad pointer format)\n"); break;
+            case 0b000100: OSLog("[P] Reason: Translation fault\n"); break;
+            case 0b001100: OSLog("[P] Reason: Permission fault (Page protection violation)\n"); break;
+            case 0b010000: OSLog("[P] Reason: Synchronous external abort\n"); break;
+            case 0b100000: OSLog("[P] Reason: Alignment fault\n"); break;
+            default:       OSLog("[P] Reason: Unknown fault code (0x%X)\n", dfsc); break;
+        }
+    }
+    PrintSeparator();
+    OSLog("Registers:\n");
+    PrintSeparator();
+    OSLog("x0  = 0x%X; x1  = 0x%X\n", frame->x0, frame->x1);
+    OSLog("x2  = 0x%X; x3  = 0x%X\n", frame->x2, frame->x3);
+    OSLog("x4  = 0x%X; x5  = 0x%X\n", frame->x4, frame->x5);
+    OSLog("x6  = 0x%X; x7  = 0x%X\n", frame->x6, frame->x7);
+    OSLog("x8  = 0x%X; x9  = 0x%X\n", frame->x8, frame->x9);
+    OSLog("x10 = 0x%X; x11 = 0x%X\n", frame->x10, frame->x11);
+    OSLog("x12 = 0x%X; x13 = 0x%X\n", frame->x12, frame->x13);
+    OSLog("x14 = 0x%X; x15 = 0x%X\n", frame->x14, frame->x15);
+    OSLog("x16 = 0x%X; x17 = 0x%X\n", frame->x16, frame->x17);
+    OSLog("x18 = 0x%X; x19 = 0x%X\n", frame->x18, frame->x19);
+    OSLog("x20 = 0x%X; x21 = 0x%X\n", frame->x20, frame->x21);
+    OSLog("x22 = 0x%X; x23 = 0x%X\n", frame->x22, frame->x23);
+    OSLog("x24 = 0x%X; x25 = 0x%X\n", frame->x24, frame->x25);
+    OSLog("x26 = 0x%X; x27 = 0x%X\n", frame->x26, frame->x27);
+    OSLog("\t  x28 = 0x%X\n", frame->x28);
+    OSLog("FP  = 0x%X; LR  = 0x%X\n", frame->x29, frame->x30);
+
+    DrawPanicFooter();
+    Halt();
+}

Kernel/Source/OS/Scheduler.c

@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <OS/Scheduler.h>
+#include <OS/Panic.h>
+#include <Arch/Exceptions.h>
+#include <Arch/CPU.h>
+#include <VM/VMM.h>
+#include <VM/Heap.h>
+#include <Lib/Align.h>
+#include <Lib/String.h>
+
+OSTask* gOSSchedulerCurrentTask = nullptr;
+UInt32 gOSSchedulerNextProcessID = 1;
+
+static OSProcess sOSSchedulerKernelProcess;
+
+void SchedulerInitialize() {
+    sOSSchedulerKernelProcess.id = 0;
+    sOSSchedulerKernelProcess.state = OSTaskStateRunning;
+    sOSSchedulerKernelProcess.l0Table = (Address*)VMPhysToHHDM((Address)gVMKernelL0Table);
+    StringCopy(sOSSchedulerKernelProcess.name, "kernel");
+
+    OSTask* kernelTask = (OSTask*)HeapAllocate(sizeof(OSTask));
+    if (!kernelTask) OSPanic("Failed to allocate kernel task");
+
+    MemorySet(kernelTask, 0, sizeof(OSTask));
+    kernelTask->id = 0;
+    kernelTask->process = &sOSSchedulerKernelProcess;
+    kernelTask->sleepTicks = 0;
+    kernelTask->next = kernelTask;
+    kernelTask->state = OSTaskStateRunning;
+    kernelTask->waitingForProcessId = -1;
+
+    gOSSchedulerCurrentTask = kernelTask;
+}
+
+OSTask* SchedulerSpawn(void(*entryPoint)(), OSProcess* owner, Boolean isUser, Address fixedUserStackAddress) {
+    OSTask* task = (OSTask*)HeapAllocate(sizeof(OSTask));
+    Pointer stackBase = nullptr;
+    if (!task) goto cleanup;
+
+    if (!owner) owner = &sOSSchedulerKernelProcess;
+    Size stackSize = kOSSchedulerTaskStackSize;
+    stackBase = HeapAllocate(stackSize);
+    if (!stackBase) goto cleanup;
+
+    Address stackPointer = (Address)stackBase + stackSize;
+    stackPointer -= sizeof(ExceptionsContext);
+    stackPointer = AlignDown64(stackPointer, 16);
+    ExceptionsContext* context = (ExceptionsContext*)stackPointer;
+    MemorySet(context, 0, sizeof(ExceptionsContext));
+    context->elr_el1 = (Address)entryPoint;
+
+    if (isUser) {
+        context->spsr_el1 = 0x00000000; // El0t (M[3:0] = 0b0000) allow interrupts
+        context->sp_el0 = fixedUserStackAddress;
+    } else {
+        context->spsr_el1 = 0x00000005; // El1h (M[3:0] = 0b0101) allow interrupts
+    }
+
+    task->stackPointer = stackPointer;
+    task->process = owner;
+    task->id = owner->id;
+    task->sleepTicks = 0;
+    task->kernelStackBase = stackBase;
+    task->kernelStackTop = (Address)stackBase + stackSize;
+    task->state = OSTaskStateRunning;
+    task->waitingForProcessId = -1;
+
+    task->next = gOSSchedulerCurrentTask->next;
+    gOSSchedulerCurrentTask->next = task;
+
+    return task;
+cleanup:
+    if (task) HeapFree(task);
+    if (stackBase) HeapFree(stackBase);
+    return nullptr;
+}
+
+Address SchedulerNext(Address stackPointer) {
+    if (!gOSSchedulerCurrentTask) return stackPointer;
+
+    gOSSchedulerCurrentTask->stackPointer = stackPointer;
+    OSTask* taskIterator = gOSSchedulerCurrentTask->next;
+
+    do {
+        if (taskIterator->sleepTicks > 0) taskIterator->sleepTicks--;
+        taskIterator = taskIterator->next;
+    } while (taskIterator != gOSSchedulerCurrentTask->next);
+
+    if (gOSSchedulerCurrentTask->sleepTicks > 0) gOSSchedulerCurrentTask->sleepTicks--;
+
+    OSTask* nextTask = gOSSchedulerCurrentTask->next;
+    while (true) {
+        if (nextTask->state == OSTaskStateDead) {
+            nextTask = nextTask->next;
+            if (nextTask == gOSSchedulerCurrentTask) OSPanic("No running tasks");
+            continue;
+        }
+        if (nextTask->state == OSTaskStateSleeping && nextTask->sleepTicks == 0) nextTask->state = OSTaskStateRunning;
+        if (nextTask->state == OSTaskStateRunning) break;
+        nextTask = nextTask->next;
+
+        if (nextTask == gOSSchedulerCurrentTask) {
+            if (gOSSchedulerCurrentTask->state == OSTaskStateRunning) break;
+            OSPanic("No running tasks");
+        }
+    }
+
+    if (nextTask->process->l0Table != gOSSchedulerCurrentTask->process->l0Table) {
+        Address physicalL0Table = VMHHDMToPhys((Address)nextTask->process->l0Table);
+        CPUSwitchAddressSpace(physicalL0Table);
+    }
+    gOSSchedulerCurrentTask = nextTask;
+
+    return gOSSchedulerCurrentTask->stackPointer;
+}
+
+void SchedulerYield(UInt64 ticks) {
+    gOSSchedulerCurrentTask->sleepTicks = ticks;
+    gOSSchedulerCurrentTask->state = OSTaskStateSleeping;
+    CPUException(kOSSchedulerExceptionNumber);
+}

Kernel/Source/Support/BridgingHeader.h

@@ -1,10 +0,0 @@
-#include "bootinfo.h"
-#include <stdint.h>
-
-static inline void mmio_write32(uintptr_t addr, uint32_t val) {
-    *(volatile uint32_t *)addr = val;
-}
-
-static inline uint32_t mmio_read32(uintptr_t addr) {
-    return *(volatile uint32_t *)addr;
-}

Kernel/Source/Support/stubs.c

@@ -1,42 +0,0 @@
-#include <stddef.h>
-#include <stdint.h>
-
-void* memmove(void* dest, const void* src, unsigned long n) {
-    unsigned char* d = (unsigned char*)dest;
-    const unsigned char* s = (const unsigned char*)src;
-    if (d < s) {
-        while (n--) *d++ = *s++;
-    } else {
-        d += n; s += n;
-        while (n--) *--d = *--s;
-    }
-    return dest;
-}
-
-void* memcpy(void* dest, const void* src, unsigned long n) {
-    return memmove(dest, src, n);
-}
-
-void* memset(void* dest, int c, unsigned long n) {
-    unsigned char* d = (unsigned char*)dest;
-    while (n--) *d++ = (unsigned char)c;
-    return dest;
-}
-
-// Stack protection
-long __stack_chk_guard = (long)0xDEADBEEFCAFEBABEULL;
-void __stack_chk_fail(void) { while (1); }
-
-// Swift runtime allocator stubs — should never be called in embedded mode
-int posix_memalign(void** ptr, unsigned long align, unsigned long size) {
-    (void)ptr; (void)align; (void)size;
-    while (1);
-}
-
-void free(void* ptr) { (void)ptr; }
-
-// Swift stdlib uses arc4random_buf for Hasher seed — stub with zeroes in bare-metal
-void arc4random_buf(void* buf, unsigned long nbytes) {
-    unsigned char* b = (unsigned char*)buf;
-    while (nbytes--) *b++ = 0;
-}

Kernel/Source/VM/Heap.c

@@ -0,0 +1,104 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <VM/Heap.h>
+#include <VM/PMM.h>
+#include <VM/VMM.h>
+#include <Lib/String.h>
+#include <OS/Panic.h>
+
+static VMHeapBlockHeader* sVMHeapListHead = nullptr;
+
+static void CombineForward(VMHeapBlockHeader* current) {
+    if (!current->next || !current->next->isFree) return;
+    current->size += sizeof(VMHeapBlockHeader) + current->next->size;
+    current->next = current->next->next;
+    if (current->next) current->next->previous = current;
+}
+
+void HeapInitialize() {
+    Address heapStart = kKernelHeapStart;
+
+    for (UInt64 i = 0; i < kHeapSizePages; i++) {
+        Address physical = (Address)PMMAllocatePage();
+        if (!physical) OSPanic("OOM during heap init");
+
+        Address virtual = heapStart + (i * kVMPageSize);
+        VMMMapPage(gVMKernelL0Table, physical, virtual, kPTENormalMem | kPTEAccessRW | kPTEPrivNX | kPTEUserNX);
+    }
+
+    sVMHeapListHead = (VMHeapBlockHeader*)heapStart;
+    sVMHeapListHead->magic = kHeapBlockHeaderMagic;
+    sVMHeapListHead->size = (kHeapSizePages * kVMPageSize) - sizeof(VMHeapBlockHeader);
+    sVMHeapListHead->isFree = true;
+    sVMHeapListHead->next = nullptr;
+    sVMHeapListHead->previous = nullptr;
+}
+
+Pointer HeapAllocate(Size size) {
+    if (size == 0) return nullptr;
+    Size alignedSize = (size + 15) & ~15;
+
+    VMHeapBlockHeader* current = sVMHeapListHead;
+    while (current) {
+        if (current->isFree && current->size >= alignedSize) {
+            if (current->size > alignedSize + sizeof(VMHeapBlockHeader) + 16) {
+                VMHeapBlockHeader* new_block = (VMHeapBlockHeader*)((Address)current + sizeof(VMHeapBlockHeader) + alignedSize);
+                new_block->size = current->size - alignedSize - sizeof(VMHeapBlockHeader);
+                new_block->isFree = true;
+                new_block->next = current->next;
+                new_block->previous = current;
+                new_block->magic = kHeapBlockHeaderMagic;
+                
+                if (current->next) current->next->previous = new_block;
+                current->next = new_block;
+                current->size = alignedSize;
+            }
+            current->isFree = false;
+            return (Pointer)((Address)current + sizeof(VMHeapBlockHeader));
+        }
+        current = current->next;
+    }
+
+    return nullptr;
+}
+
+void HeapFree(Pointer pointer) {
+    if (!pointer) return;
+
+    VMHeapBlockHeader* current = (VMHeapBlockHeader*)((Address)pointer - sizeof(VMHeapBlockHeader));
+    if (current->magic != kHeapBlockHeaderMagic) return;
+    
+    current->isFree = true;
+    if (current->next && current->next->isFree) CombineForward(current);
+    if (current->previous && current->previous->isFree) CombineForward(current->previous);
+}
+
+Pointer HeapResize(Pointer pointer, Size newSize) {
+    if (!pointer) return HeapAllocate(newSize);
+    if (newSize == 0) { 
+        HeapFree(pointer); 
+        return nullptr; 
+    }
+
+    Size alignedSize = (newSize + 15) & ~15;
+
+    VMHeapBlockHeader* current = (VMHeapBlockHeader*)((Address)pointer - sizeof(VMHeapBlockHeader));
+    if (current->size >= alignedSize) {
+        return pointer;
+    }
+
+    if (current->next && current->next->isFree &&
+        (current->size + sizeof(VMHeapBlockHeader) + current->next->size) >= alignedSize) {
+            CombineForward(current);
+            return pointer;
+    }
+
+    Pointer newPointer = HeapAllocate(newSize);
+    if (newPointer) {
+        MemoryCopy(newPointer, pointer, current->size);
+        HeapFree(pointer);
+    }
+
+    return newPointer;
+}

Kernel/Source/VM/PMM.c

@@ -0,0 +1,85 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <VM/PMM.h>
+#include <Lib/String.h>
+
+extern char _kernelStart[];
+extern char _kernelEnd[];
+
+static Address sPMMRamBase = 0;
+static MemoryPointer sPMMBitmap;
+static Size sPMMBitmapSize;
+static Size sPMMTotalPages;
+
+static inline Size BitmapGetByteIndex(Address address) {
+    return ((address - sPMMRamBase) / kVMPageSize) / kVMBlocksPerByte;
+}
+
+static inline UInt8 BitmapGetBitOffset(Address address) {
+    return (UInt8)(((address - sPMMRamBase) / kVMPageSize) % kVMBlocksPerByte);
+}
+
+static inline void BitmapSet(MemoryPointer bitmap, Address address) {
+    bitmap[BitmapGetByteIndex(address)] |= (1U << BitmapGetBitOffset(address));
+}
+
+static inline void BitmapUnset(MemoryPointer bitmap, Address address) {
+    bitmap[BitmapGetByteIndex(address)] &= ~(1U << BitmapGetBitOffset(address));
+}
+
+void PMMInitialize(VMBootMemoryMap* bootMap) {
+    sPMMRamBase = bootMap->totalRAM.base;
+    sPMMTotalPages = bootMap->totalRAM.size / kVMPageSize;
+    sPMMBitmapSize = (sPMMTotalPages + kVMBlocksPerByte - 1) / kVMBlocksPerByte;
+    sPMMBitmap = (MemoryPointer)_kernelEnd;
+    MemorySet(sPMMBitmap, 0, sPMMBitmapSize);
+
+    UInt32 safeIndex = bootMap->reservedCount;
+    bootMap->reserved[safeIndex].base = sPMMRamBase;
+    bootMap->reserved[safeIndex].size = 16 * 1024 * 1024; // 16 Mb
+    bootMap->reservedCount++;
+
+    UInt32 kIndex = bootMap->reservedCount;
+    bootMap->reserved[kIndex].base = (Address)_kernelStart;
+    bootMap->reserved[kIndex].size = (Address)_kernelEnd - (Address)_kernelStart;
+    bootMap->reservedCount++;
+
+    UInt32 bIndex = bootMap->reservedCount;
+    bootMap->reserved[bIndex].base = (Address)sPMMBitmap;
+    bootMap->reserved[bIndex].size = sPMMBitmapSize;
+    bootMap->reservedCount++;
+
+    for (Size i = 0; i < bootMap->reservedCount; i++) {
+        Address regionBase = bootMap->reserved[i].base;
+        Size regionSize = bootMap->reserved[i].size;
+
+        Size pagesToReserve = (regionSize + kVMPageSize - 1) / kVMPageSize;
+
+        for (Size p = 0; p < pagesToReserve; p++) {
+            Address pageAddress = regionBase + (p * kVMPageSize);
+            if (pageAddress >= sPMMRamBase && pageAddress < (sPMMRamBase + bootMap->totalRAM.size)) {
+                BitmapSet(sPMMBitmap, pageAddress);
+            }
+        }
+    }
+}
+
+Pointer PMMAllocatePage() {
+    for (Size i = 0; i < sPMMBitmapSize; i++) {
+        if (sPMMBitmap[i] == 0xFF) continue;
+        for (Size bit = 0; bit < kVMBlocksPerByte; bit++) {
+            if ((sPMMBitmap[i] & (1 << bit)) == 0) {
+                Address address = sPMMRamBase + (i * kVMBlocksPerByte + bit) * kVMPageSize;
+                BitmapSet(sPMMBitmap, address);
+                return (Pointer)address;
+            }
+        }
+    }
+
+    return nullptr;
+}
+
+void PMMFreePage(Address address) {
+    BitmapUnset(sPMMBitmap, address);
+}

Kernel/Source/VM/VMM.c

@@ -0,0 +1,250 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+// Copyright (c) 2026 0xKSor
+
+#include <VM/VMM.h>
+#include <VM/PMM.h>
+#include <Lib/String.h>
+#include <Arch/CPU.h>
+#include <OS/Panic.h>
+#include <OS/Log.h>
+#include "../Common/bootinfo.h"
+
+static const UInt64 kPTEAddressMask = 0x0000FFFFFFFFF000ULL;
+static inline Address GetPTEAddress(UInt64 entry) { return entry & kPTEAddressMask; }
+static inline UInt16 GetL0Index(Address virt) { return (virt >> 39) & 0x1FF; }
+static inline UInt16 GetL1Index(Address virt) { return (virt >> 30) & 0x1FF; }
+static inline UInt16 GetL2Index(Address virt) { return (virt >> 21) & 0x1FF; }
+static inline UInt16 GetL3Index(Address virt) { return (virt >> 12) & 0x1FF; }
+
+static Boolean isInitialized = false;
+
+Address* gVMKernelL0Table = nullptr;
+Address gVMKernelL0Physical = 0;
+
+extern char _kernelStart[];
+extern char _kernelEnd[];
+
+static Address* GetVirtualTable(Address phys) {
+    if (isInitialized) return (Address*)VMPhysToHHDM(phys);
+    return (Address*)phys;
+}
+
+static inline Address* GetOrAllocateTable(Address* parentTable, Size index, UInt64 flags, UInt64 directoryFlags) {
+    if (!(parentTable[index] & kPTEValid)) {
+        Pointer newTable = PMMAllocatePage();
+        if (!newTable) return nullptr;
+
+        Address* newTableVirt = GetVirtualTable((Address)newTable);
+        MemorySet(newTableVirt, 0, kVMPageSize);
+
+        parentTable[index] = (Address)newTable | directoryFlags;
+        return newTableVirt;
+    }
+
+    // if user access requested, clear APTable bit to allow EL0 table walk.
+    // otherwise leave APTable as-is (kernel-only tables keep kPTETableNoEL0).
+    if (flags & kPTEUser) {
+        parentTable[index] &= ~kPTETableNoEL0;
+    }
+
+    Address physAddress = GetPTEAddress(parentTable[index]);
+    return GetVirtualTable(physAddress);
+}
+
+static Address GetMappedPhysicalAddress(Address* l0Table, Address virt) {
+    // A little bit of Monica in my life
+    UInt16 l0Index = GetL0Index(virt);
+    // A little bit of Erica by my side
+    UInt16 l1Index = GetL1Index(virt);
+    // A little bit of Rita's all I need
+    UInt16 l2Index = GetL2Index(virt);
+    // A little bit of Tina's what I see
+    UInt16 l3Index = GetL3Index(virt);
+
+    // A little bit of Sandra in the sun
+    Address* l0Virt = l0Table;
+    if (isInitialized) l0Virt = (Address*)VMPhysToHHDM((Address)l0Table);
+    if (!(l0Virt[l0Index] & kPTEValid)) return 0;
+
+    // A little bit of Mary all night long...
+    Address* l1Virt = GetVirtualTable(GetPTEAddress(l0Virt[l0Index]));
+    if (!(l1Virt[l1Index] & kPTEValid)) return 0;
+
+    // A little bit of Jessica, here I am!
+    Address* l2Virt = GetVirtualTable(GetPTEAddress(l1Virt[l1Index]));
+    if (!(l2Virt[l2Index] & kPTEValid)) return 0;
+
+    // A little bit of you makes me your man
+    Address* l3Virt = GetVirtualTable(GetPTEAddress(l2Virt[l2Index]));
+    if (!(l3Virt[l3Index] & kPTEValid)) return 0;
+
+    return GetPTEAddress(l3Virt[l3Index]);
+}
+
+Address* VMMMapPage(Address* l0Table, Address phys, Address virt, UInt64 flags) {
+    UInt16 l0Index = GetL0Index(virt);
+    UInt16 l1Index = GetL1Index(virt);
+    UInt16 l2Index = GetL2Index(virt);
+    UInt16 l3Index = GetL3Index(virt);
+
+    Address* l0Virt = l0Table;
+    if (isInitialized) l0Virt = (Address*)VMPhysToHHDM((Address)l0Table);
+
+    // build directory flags for table descriptors
+    // APTable=01 (kPTETableNoEL0) blocks EL0 entirely - used for kernel-only subtrees.
+    // APTable=00 allows EL0 access by leaf page permissions - used for user mappings.
+    UInt64 directoryFlags = kPTEValid | kPTETable;
+    if (!(flags & kPTEUser)) {
+        directoryFlags |= kPTETableNoEL0;
+    }
+
+    Address* l1Virt = GetOrAllocateTable(l0Virt, l0Index, flags, directoryFlags);
+    if (!l1Virt) return nullptr;
+
+    Address* l2Virt = GetOrAllocateTable(l1Virt, l1Index, flags, directoryFlags);
+    if (!l2Virt) return nullptr;
+
+    Address* l3Virt = GetOrAllocateTable(l2Virt, l2Index, flags, directoryFlags);
+    if (!l3Virt) return nullptr;
+
+    l3Virt[l3Index] = phys | flags | kPTEPage | kPTEAccessFlag | kPTEValid;
+    if (isInitialized) CPUInvalidateTLB(virt);
+    return l3Virt;
+}
+
+void VMMUnmapPage(Address* l0Table, Address virt) {
+    UInt16 l0Index = GetL0Index(virt);
+    UInt16 l1Index = GetL1Index(virt);
+    UInt16 l2Index = GetL2Index(virt);
+    UInt16 l3Index = GetL3Index(virt);
+
+    Address* l0Virt = l0Table;
+    if (isInitialized) l0Virt = (Address*)VMPhysToHHDM((Address)l0Table);
+    if (!(l0Virt[l0Index] & kPTEValid)) return;
+
+    Address* l1Virt = GetVirtualTable(GetPTEAddress(l0Virt[l0Index]));
+    if (!(l1Virt[l1Index] & kPTEValid)) return;
+
+    Address* l2Virt = GetVirtualTable(GetPTEAddress(l1Virt[l1Index]));
+    if (!(l2Virt[l2Index] & kPTEValid)) return;
+
+    Address* l3Virt = GetVirtualTable(GetPTEAddress(l2Virt[l2Index]));
+    l3Virt[l3Index] = 0;
+
+    CPUInvalidateTLB(virt);
+}
+
+Pointer VMMGetOrAllocatePage(Address* l0Table, Address virt, UInt64 flags) {
+    Address existingPhys = GetMappedPhysicalAddress(l0Table, virt);
+    if (existingPhys) return (Pointer)GetVirtualTable(existingPhys);
+
+    Pointer newPhys = PMMAllocatePage();
+    if (!newPhys) return nullptr; // OOM
+
+    Address* mappedVirt = VMMMapPage(l0Table, (Address) newPhys, virt, flags);
+    if (!mappedVirt) return nullptr;
+
+    Pointer finalVirtAddress = (Pointer)GetVirtualTable((Address)newPhys);
+    MemorySet(finalVirtAddress, 0, kVMPageSize);
+
+    return finalVirtAddress;
+}
+
+void VMMInitialize(VMBootMemoryMap* bootMap, Bootinfo* info) {
+    gVMKernelL0Physical = (Address)PMMAllocatePage();
+    gVMKernelL0Table = (Address*)gVMKernelL0Physical;
+    if (!gVMKernelL0Physical) OSPanic("Failed to allocate kernel L0 table");
+    MemorySet(gVMKernelL0Table, 0, kVMPageSize);
+
+    OSLog("Mapping RAM.. Can take a while\n");
+    Size totalRAM = bootMap->totalRAM.size;
+    Size ramEnd = bootMap->totalRAM.base + totalRAM;
+    for (Address phys = bootMap->totalRAM.base; phys < ramEnd; phys += kVMPageSize) {
+        VMMMapPage(
+            gVMKernelL0Table,
+            phys, VMPhysToHHDM(phys),
+            kPTENormalMem | kPTEAccessRW | kPTEPrivNX | kPTEUserNX
+        );
+    }
+    OSLog("RAM mapped\n");
+
+    Size totalPages = bootMap->totalRAM.size / kVMPageSize;
+    Size pmmBitmapSize = (totalPages + kVMBlocksPerByte - 1) / kVMBlocksPerByte;
+    Size kernelSize = ((Address)_kernelEnd - (Address)_kernelStart) + pmmBitmapSize;
+    kernelSize = (kernelSize + kVMPageSize - 1) & ~(kVMPageSize - 1);
+
+    Address kernelPhysStart = kKernelPhysBase;
+
+    for (Address offset = 0; offset < kernelSize; offset += kVMPageSize) {
+        Address phys = kernelPhysStart + offset;
+        Address virt = (Address)_kernelStart + offset;
+        VMMMapPage(gVMKernelL0Table, phys, virt, kPTENormalMem | kPTEAccessRW);
+    }
+    OSLog("Kernel mapped to HHDM\n");
+
+    for (Address offset = 0; offset < kernelSize; offset += kVMPageSize) {
+        VMMMapPage(gVMKernelL0Table, kernelPhysStart + offset, kernelPhysStart + offset, kPTENormalMem | kPTEAccessRW);
+    }
+    OSLog("Kernel Identity mapped\n");
+
+    Address fbPhys = (Address)info->framebuffer.base;
+    Size fbSize = info->framebuffer.baseSize;
+    for (Address offset = 0; offset < fbSize; offset += kVMPageSize) {
+        VMMMapPage(
+            gVMKernelL0Table, fbPhys + offset,
+            kVMFbVirtBase + offset,
+            kPTEDeviceMem | kPTEAccessRW | kPTEUserNX | kPTEPrivNX
+        );
+    }
+    OSLog("Framebuffer mapped\n");
+
+    Address UARTPhys = bootMap->UART.base;
+    if (!UARTPhys) UARTPhys = 0x09000000;
+
+    VMMMapPage(
+        gVMKernelL0Table, UARTPhys, VMPhysToHHDM(UARTPhys),
+        kPTEDeviceMem | kPTEAccessRW | kPTEUserNX | kPTEPrivNX
+    );
+    VMMMapPage(
+        gVMKernelL0Table, UARTPhys, UARTPhys,
+        kPTEDeviceMem | kPTEAccessRW | kPTEUserNX | kPTEPrivNX
+    );
+    OSLog("UART mapped\n");
+
+    Address gicdPhys = bootMap->GIC.GICD.base;
+    Size gicdSize = bootMap->GIC.GICD.size;
+    if (!gicdPhys) {
+        gicdPhys = 0x08000000; // QEMU fallback
+        gicdSize = 0x10000;
+    }
+
+    for (Address offset = 0; offset < gicdSize; offset += kVMPageSize) {
+        VMMMapPage(
+            gVMKernelL0Table, gicdPhys + offset,
+            VMPhysToHHDM(gicdPhys + offset),
+            kPTEDeviceMem | kPTEAccessRW | kPTEUserNX | kPTEPrivNX
+        );
+    }
+    OSLog("GICD mapped\n");
+
+    Address giccPhys = bootMap->GIC.GICC.base;
+    Size giccSize = bootMap->GIC.GICC.size;
+    if (!giccPhys) {
+        giccPhys = 0x08001000; // QEMU fallback
+        giccSize = 0x10000;
+    }
+
+    for (Address offset = 0; offset < giccSize; offset += kVMPageSize) {
+        VMMMapPage(
+            gVMKernelL0Table, giccPhys + offset,
+            VMPhysToHHDM(giccPhys + offset),
+            kPTEDeviceMem | kPTEAccessRW | kPTEUserNX | kPTEPrivNX
+        );
+    }
+    OSLog("GICC mapped\n");
+
+    info->framebuffer.base = (BIUInt32*)kVMFbVirtBase;
+    OSLog("Enabling MMU...\n");
+    CPUEnableMMU(gVMKernelL0Physical);
+    isInitialized = true;
+}

Kernel/Source/kernel.swift

@@ -1,23 +0,0 @@
-@_cdecl("kmain")
-public func kernelMain(_ bootInfo: UnsafeMutablePointer<Bootinfo>) {
-    let fb = bootInfo.pointee.framebuffer
-
-    let pixels = fb.base!
-
-    let width  = Int(fb.width)
-    let height = Int(fb.height)
-    let total  = width * height
-    let stripe = total / 5
-
-    var i = 0
-    while i < total {
-        let s = i / stripe
-        let color: UInt32
-        if s == 0 || s >= 4 { color = 0x5BCEFA }
-        else if s == 2      { color = 0xFFFFFF  }
-        else                { color = 0xF5A7B8  }
-        pixels[i] = color
-        i &+= 1
-    }
-    kprint("Meow prrr meow nyaaa\n")
-}

Kernel/cmake/aarch64-bare.cmake

@@ -1,28 +1,58 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright (c) 2026 0xKSor
+
 set(CMAKE_SYSTEM_NAME Generic)
 set(CMAKE_SYSTEM_PROCESSOR aarch64)
 set(CMAKE_TRY_COMPILE_TARGET_TYPE STATIC_LIBRARY)
 
 if(NOT LLVM_BIN)
-    if(APPLE)
+    find_program(_CLANG
+        NAMES clang
+        HINTS
+            /opt/homebrew/opt/llvm/bin
+            /usr/local/opt/llvm/bin
+    )
+
+    if(NOT _CLANG AND APPLE)
         execute_process(
             COMMAND brew --prefix llvm
             OUTPUT_VARIABLE LLVM_PREFIX
             OUTPUT_STRIP_TRAILING_WHITESPACE
+            ERROR_QUIET
+            RESULT_VARIABLE BREW_PREFIX_RESULT
         )
-        set(LLVM_BIN "${LLVM_PREFIX}/bin")
+        if(BREW_PREFIX_RESULT EQUAL 0 AND EXISTS "${LLVM_PREFIX}/bin/clang")
-    else()
+            set(_CLANG "${LLVM_PREFIX}/bin/clang")
-        find_program(_CLANG clang)
-        if(NOT _CLANG)
-            message(FATAL_ERROR "clang not found.")
         endif()
-        get_filename_component(LLVM_BIN "${_CLANG}" DIRECTORY)
     endif()
+
+    if(NOT _CLANG)
+        message(FATAL_ERROR "clang not found. Set LLVM_BIN or add clang to PATH.")
+    endif()
+
+    get_filename_component(LLVM_BIN "${_CLANG}" DIRECTORY)
 endif()
 
 set(CMAKE_C_COMPILER   "${LLVM_BIN}/clang")
 set(CMAKE_ASM_COMPILER "${LLVM_BIN}/clang")
-set(LLVM_OBJCOPY       "${LLVM_BIN}/llvm-objcopy")
 
 set(TARGET_TRIPLE aarch64-none-elf)
 set(CMAKE_C_COMPILER_TARGET   ${TARGET_TRIPLE})
 set(CMAKE_ASM_COMPILER_TARGET ${TARGET_TRIPLE})
+
+if(APPLE)
+    find_program(TERMOS_LD_LLD NAMES ld.lld HINTS /usr/local/bin /opt/homebrew/bin REQUIRED)
+    set(CMAKE_C_LINK_FLAGS "")
+    set(CMAKE_C_LINK_EXECUTABLE
+        "${TERMOS_LD_LLD} <CMAKE_C_LINK_FLAGS> <LINK_FLAGS> <OBJECTS> -o <TARGET> <LINK_LIBRARIES>")
+endif()
+
+find_program(LLVM_OBJCOPY NAMES llvm-objcopy objcopy
+    HINTS
+        "${LLVM_BIN}"
+        /usr/local/opt/llvm/bin
+        /opt/homebrew/opt/llvm/bin
+        /usr/local/bin
+        /opt/homebrew/bin
+    REQUIRED
+)

Kernel/justfile

@@ -1,13 +1,18 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright (c) 2026 0xKSor
+
 BUILD_DIR := env_var_or_default("BUILD_DIR", justfile_directory() + "/.build") 
 TEMP_DIR := env_var_or_default("TEMP_DIR", BUILD_DIR + "/temp")
 build:
     cmake -B {{TEMP_DIR}}/Kernel -S . \
-        -DCMAKE_TOOLCHAIN_FILE=cmake/aarch64-bare.cmake
+        -DCMAKE_TOOLCHAIN_FILE=cmake/aarch64-bare.cmake \
+        -G Ninja
 
     cmake --build {{TEMP_DIR}}/Kernel
 
-    cp {{TEMP_DIR}}/Kernel/kernel.bin {{BUILD_DIR}}/Kernel/ksOSKernel.bin
+    cp {{TEMP_DIR}}/Kernel/ksOSKernel.elf {{BUILD_DIR}}/Kernel/ksOSKernel.elf
-    @echo "✅ Kernel ready at: {{BUILD_DIR}}/Kernel/ksOSKernel.bin"
+    @echo "✅ Kernel ready at: {{BUILD_DIR}}/Kernel/ksOSKernel.elf"
 
 clean:
-    rm -rf {{TEMP_DIR}}/Kernel
+    rm -rf {{TEMP_DIR}}/Kernel
+    rm -f compile_commands.json

Kernel/linker.ld

@@ -1,15 +1,46 @@
+/* SPDX-License-Identifier: GPL-3.0-or-later
+ * Copyright (c) 2026 0xKSor
+ */
+
 ENTRY(_start)
 
-SECTIONS {
+KERNEL_PA = 0x40100000;
-    . = 0;
+KERNEL_VA = 0xFFFFFFFF80100000;
 
-    .text : {
+PHDRS
+{
+  text PT_LOAD FLAGS(5); /* Read | Execute */
+  data PT_LOAD FLAGS(6); /* Read | Write */
+}
+
+SECTIONS
+{
+    . = KERNEL_VA;
+    _kernelStart = .;
+
+    .text : AT(ADDR(.text) - KERNEL_VA + KERNEL_PA) {
         *(.text.boot)
         *(.text*)
-    }
+    } :text
 
-    .rodata : { *(.rodata*) }
+    . = ALIGN(8);
-    .data   : { *(.data*)   }
+    .rodata : AT(ADDR(.rodata) - KERNEL_VA + KERNEL_PA) {
-    .bss    : { *(.bss*) *(COMMON) }
+        *(.rodata*)
+    } :text
 
+    . = ALIGN(4096);
+    .data : AT(ADDR(.data) - KERNEL_VA + KERNEL_PA) {
+        *(.data*)
+    } :data
+
+    . = ALIGN(8);
+    .bss : AT(ADDR(.bss) - KERNEL_VA + KERNEL_PA) {
+        __bss_start = .;
+        *(.bss*)
+        *(COMMON)
+        __bss_end = .;
+    } :data
+
+    . = ALIGN(4096);
+    _kernelEnd = .;
 }

LICENSE

@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
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+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
+your programs, too.
+
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+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
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+
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+
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+convey, without conditions so long as your license otherwise remains
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+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
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+circumvention of technological measures to the extent such circumvention
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+  You may convey verbatim copies of the Program's source code as you
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+and you may offer support or warranty protection for a fee.
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+the scope of its coverage, prohibits the exercise of, or is
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+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
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+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Use with the GNU Affero General Public License.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
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+but the special requirements of the GNU Affero General Public License,
+section 13, concerning interaction through a network will apply to the
+combination as such.
+
+  14. Revised Versions of this License.
+
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+the GNU General Public License from time to time.  Such new versions will
+be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
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+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
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+  15. Disclaimer of Warranty.
+
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+
+  17. Interpretation of Sections 15 and 16.
+
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+reviewing courts shall apply local law that most closely approximates
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+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
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+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
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+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
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+
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+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
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+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
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+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<https://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -1,3 +1,6 @@
-# ksOS
+# ![ksOS](Assets/ksOS.png) ksOS
 
-Meow meow purrr nya meow :3
+![arch](https://img.shields.io/badge/arch-ARM-0091BD?style=flat-square) ![lang](https://img.shields.io/badge/lang-C%20%7C%20ASM-6366F1?style=flat-square) ![license](https://img.shields.io/badge/license-GPL--3.0-brightgreen?style=flat-square)
+
+> *"Just for fun. Never serious. Meow meow"*  
+> — Linus Torvalds

justfile

@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright (c) 2026 0xKSor
+
 set quiet := true
 
 OS_NAME   := os()
@@ -17,9 +20,10 @@ CPU := if ARCH_NAME == "aarch64" { "host" } else { "max" }
 OVMF_ARM := if OS_NAME == "macos" {
     HB_PREFIX + "/share/qemu/edk2-aarch64-code.fd"
 } else {
-    env_var_or_default("OVMF_PATH", "/usr/share/edk2/aarch64/QEMU_EFI.fd")
+    BUILD_DIR + "/edk2/edk2-aarch64-code.fd"
 }
 
+
 DISPLAY_FLAGS := if OS_NAME == "macos" {
     "-display cocoa,show-cursor=on"
 } else {
@@ -27,6 +31,7 @@ DISPLAY_FLAGS := if OS_NAME == "macos" {
 }
 
 ACCEL_INFO := if ACCEL == "" { "none (TCG)" } else { ACCEL }
+RAM := "2G"
 
 export BUILD_DIR := justfile_directory() + "/.build"
 export TEMP_DIR  := BUILD_DIR + "/temp"
@@ -43,6 +48,14 @@ _prep:
     @mkdir -p {{BUILD_DIR}}/Bootloader
     @mkdir -p {{TEMP_DIR}}/Bootloader
     @mkdir -p {{BUILD_DIR}}/Kernel
+    @if [ "{{OS_NAME}}" != "macos" ]; then \
+        mkdir -p {{BUILD_DIR}}/edk2; \
+        if [ ! -f "{{OVMF_ARM}}" ]; then \
+            echo "⬇️  Downloading vanilla EDK2 for Linux..."; \
+            curl -sL -o "{{OVMF_ARM}}.bz2" "https://github.com/qemu/qemu/raw/master/pc-bios/edk2-aarch64-code.fd.bz2"; \
+            bzip2 -d "{{OVMF_ARM}}.bz2"; \
+        fi \
+    fi
 
 @build: _prep
     @echo "🛠️ Building everything..."
@@ -55,26 +68,53 @@ _prep:
     @mkfs.fat -F 32 {{IMG_FILE}} > /dev/null
     @mmd -i {{IMG_FILE}} ::/EFI ::/EFI/BOOT
     @mcopy -i {{IMG_FILE}} {{BOOT_BIN}} ::/EFI/BOOT/BOOTAA64.EFI
-    @mcopy -i {{IMG_FILE}} {{BUILD_DIR}}/Kernel/ksOSKernel.bin ::/ksOSKernel.bin
+    @mcopy -i {{IMG_FILE}} {{BUILD_DIR}}/Kernel/ksOSKernel.elf ::/ksOSKernel.elf
+
+
+run *FLAGS:
+    #!/usr/bin/env bash
+    set -e
+
+    FLAGS=" {{FLAGS}} "
+
+    if [[ "$FLAGS" == *" -clean "* ]]; then
+        echo "🧹 Cleaning..."
+        just clean
+    fi
+
+    just _image
+
+    DEBUG_ARGS=""
+    DISPLAY_ARGS="{{DISPLAY_FLAGS}}"
+    STATE_MSG="Launching"
+
+    if [[ "$FLAGS" == *" -debug "* ]]; then
+        DEBUG_ARGS="-s -S"
+        STATE_MSG="Debugging"
+    fi
+
+    if [[ "$FLAGS" == *" -nographic "* ]]; then
+        DISPLAY_ARGS="-nographic"
+    fi
+
+    echo "🚀 $STATE_MSG (accel: {{ACCEL_INFO}})..."
 
-@run: _image
-    @echo "🚀 Launching (accel: {{ACCEL_INFO}})..."
     qemu-system-aarch64 {{ACCEL}} \
         -machine virt,acpi=off \
         -cpu {{CPU}} \
-        -m 512M \
+        -m {{RAM}} \
         -device ramfb \
-        {{DISPLAY_FLAGS}} \
+        $DISPLAY_ARGS \
         -drive if=pflash,format=raw,readonly=on,file={{OVMF_ARM}} \
         -drive file={{IMG_FILE}},format=raw,if=none,id=hd0 \
         -device virtio-blk-device,drive=hd0 \
         -serial stdio \
-        -monitor telnet:127.0.0.1:5555,server,nowait
+        -monitor telnet:127.0.0.1:5555,server,nowait \
-
+        $DEBUG_ARGS
-@crun:
-    @echo "🧹 Cleaning and running.."
-    just clean
-    just run
 
 @clean:
+    just Bootloader clean
+    just Kernel clean
     rm -rf {{BUILD_DIR}}
+    rm -f compile_commands.json
+    rm -f ide-swift-toolchain.txt