126 lines
2.9 KiB
Plaintext
126 lines
2.9 KiB
Plaintext
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prekernel_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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"-fno-builtin",
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"-march=rv64ima",
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"-mabi=lp64",
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"-fpie",
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"-mcmodel=medany",
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]
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prekernel_asm_flags = [
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"-mcmodel=medany",
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"-march=rv64ima",
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"-mabi=lp64",
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]
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prekernel_ld_flags = [ "-nostdlib" ]
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if (kernel_symbols) {
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prekernel_c_flags += [ "-ggdb" ]
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}
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if (host == "gnu") {
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prekernel_ld_flags += [
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# "-mno-relax",
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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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prekernel_ld_flags += [
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"--oformat",
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"elf64",
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]
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}
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config("prekernel_flags") {
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cflags = prekernel_c_flags
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asmflags = prekernel_asm_flags
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ldflags = prekernel_ld_flags
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defines = [ "xOS_prekernel" ]
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}
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linker_script =
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rebase_path("//build/boot/$target_arch/prekernel/prekernel_link.ld",
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root_build_dir)
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# Use a strange __EMPTY_PATH_, empty string can't be passed as an arg.
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path_to_bins = "__EMPTY_PATH_"
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if (host == "llvm") {
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path_to_bins = llvm_bin_path
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}
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devtree_compile_script_args = [
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rebase_path("//firmware/$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/$target_board.obto",
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]
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args = devtree_compile_script_args
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}
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embed_kernel_script_args = [
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rebase_path("$root_build_dir/base/boot/kernel.bin", root_build_dir),
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rebase_path("$root_build_dir/tmp/boot/kernel.o", root_build_dir),
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"$target_arch",
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"$target_board",
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"$host",
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"$path_to_bins",
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]
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action("embed_kernel") {
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script = "embed_kernel.py"
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sources = [ "$root_build_dir/base/boot/kernel.bin" ]
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outputs = [ "$root_build_dir/tmp/boot/kernel.o" ]
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args = embed_kernel_script_args
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deps = [ "//build/kernel:kernel_build" ]
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}
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executable("prekernelriscv64") {
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output_name = "prekernelriscv64.bin"
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sources = [
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"//boot/libboot/devtree/devtree.c",
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"//boot/libboot/elf/elf_lite.c",
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"//boot/libboot/log/log.c",
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"//boot/libboot/mem/alloc.c",
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"//boot/libboot/mem/mem.c",
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"//boot/riscv64/prekernel/drivers/uart.c",
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"//boot/riscv64/prekernel/entry.S",
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"//boot/riscv64/prekernel/main.c",
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"//boot/riscv64/prekernel/vm.c",
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]
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include_dirs = [ "//boot" ]
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inputs = [
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"$root_out_dir/firmware/$target_board.obto",
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"$root_out_dir/tmp/boot/kernel.o",
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]
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deps = [
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":devtree_compile",
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":embed_kernel",
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]
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configs = [ ":prekernel_flags" ]
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ldflags = [
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# Embeding kernel elf file into rawimage.
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rebase_path("$root_out_dir/firmware/$target_board.obto", ""),
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rebase_path("$root_out_dir/tmp/boot/kernel.o", ""),
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"-T$linker_script",
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]
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}
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