112 lines
2.5 KiB
Plaintext
112 lines
2.5 KiB
Plaintext
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boot_c_flags = [
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"-ffreestanding",
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"-Werror",
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"-Wno-address-of-packed-member",
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]
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boot_asm_flags = []
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boot_ld_flags = []
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if (kernel_symbols) {
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boot_c_flags += [ "-ggdb" ]
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}
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boot_c_flags += [
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"-fno-builtin",
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"-march=armv7-a",
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"-mfpu=neon-vfpv4",
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"-mfloat-abi=soft",
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"-fno-pie",
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]
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boot_asm_flags += [
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"-march=armv7-a",
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"-mfpu=neon-vfpv4",
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"-mfloat-abi=softfp",
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"-mcpu=cortex-a15",
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]
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boot_ld_flags += [ "-nostdlib" ]
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if (host == "gnu") {
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boot_ld_flags += [
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"-nostdinc",
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"-nodefaultlibs",
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"-nostartfiles",
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"-lgcc",
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]
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}
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if (host == "llvm") {
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boot_ld_flags += [
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"--oformat",
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"elf32-littlearm",
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"/usr/lib/llvm-18/lib/clang/18/lib/linux/libclang_rt.builtins-arm.a",
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]
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}
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config("boot_flags") {
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cflags = boot_c_flags
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asmflags = boot_asm_flags
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ldflags = boot_ld_flags
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defines = [ "xOS_kernel" ]
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}
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linker_script =
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rebase_path("//build/boot/$target_arch/boot_link.ld", root_build_dir)
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# Use a strange __EMPTY_PATH_, empty string can't be passed as an arg.
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path_to_bins = "__EMPTY_PATH_"
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if (host == "llvm") {
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path_to_bins = llvm_bin_path
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}
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devtree_compile_script_args = [
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rebase_path("//firmware/$target_arch/$target_board.odt", root_build_dir),
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rebase_path("$root_out_dir/firmware/$target_board.obt", root_build_dir),
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"$target_arch",
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"$target_board",
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"$host",
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"$path_to_bins",
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]
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action("devtree_compile") {
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script = "//build/kernel/devtree_compile.py"
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inputs = [ "//firmware/$target_arch/$target_board.odt" ]
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outputs = [
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"$root_out_dir/firmware/$target_board.obt",
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"$root_out_dir/firmware/$target_board.obto",
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]
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args = devtree_compile_script_args
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}
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executable("bootarm") {
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deps = [ ":devtree_compile" ]
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output_name = "bootarm.bin"
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sources = [
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"//boot/arm32/drivers/pl181.c",
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"//boot/arm32/drivers/uart.c",
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"//boot/arm32/entry.s",
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"//boot/arm32/hw/ram.c",
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"//boot/arm32/main.c",
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"//boot/arm32/start_kernel.s",
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"//boot/arm32/vmm/vmm.c",
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"//boot/libboot/crypto/sha256.c",
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"//boot/libboot/crypto/signature.c",
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"//boot/libboot/crypto/uint2048.c",
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"//boot/libboot/crypto/validate.c",
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"//boot/libboot/devtree/devtree.c",
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"//boot/libboot/elf/elf_lite.c",
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"//boot/libboot/fs/ext2_lite.c",
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"//boot/libboot/log/log.c",
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"//boot/libboot/mem/alloc.c",
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"//boot/libboot/mem/mem.c",
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]
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include_dirs = [ "//boot" ]
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configs = [ ":boot_flags" ]
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ldflags = [
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rebase_path("$root_out_dir/firmware/$target_board.obto", root_build_dir),
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"-T$linker_script",
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]
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}
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