feat: working bootloader and basic kernel (just dyes screen green)

Kernel/CMakeLists.txt

@@ -0,0 +1,30 @@
+cmake_minimum_required(VERSION 3.10)
+project(MyShittyKernel LANGUAGES ASM C)
+
+if(NOT LLVM_BIN)
+    execute_process(COMMAND brew --prefix llvm OUTPUT_VARIABLE LLVM_PREFIX OUTPUT_STRIP_TRAILING_WHITESPACE)
+    set(LLVM_BIN "${LLVM_PREFIX}/bin")
+endif()
+
+set(CMAKE_C_COMPILER "${LLVM_BIN}/clang")
+set(CMAKE_ASM_COMPILER "${LLVM_BIN}/clang")
+set(LLVM_OBJCOPY "${LLVM_BIN}/llvm-objcopy")
+
+set(TARGET_TRIPLE aarch64-none-elf)
+add_compile_options(--target=${TARGET_TRIPLE} -ffreestanding -nostdlib -O0 -g)
+
+set(LINKER_SCRIPT ${CMAKE_CURRENT_SOURCE_DIR}/linker.ld)
+add_link_options(
+    --target=${TARGET_TRIPLE}
+    -fuse-ld=lld
+    -nostdlib
+    -static
+    -Wl,-T,${LINKER_SCRIPT}
+)
+
+add_executable(kernel.elf Source/entry.S)
+
+add_custom_command(TARGET kernel.elf POST_BUILD
+    COMMAND ${LLVM_OBJCOPY} -O binary kernel.elf kernel.bin
+    COMMENT "kernel.elf -> kernel.bin"
+)