49 lines
1.1 KiB
Makefile
49 lines
1.1 KiB
Makefile
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# Build script for BIOS (legacy) boot.
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#
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# This compiles our bootloader as a static library,
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# and wraps it in a multistage loader.
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BUILD = ./build
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BIOS_BUILD = $(BUILD)/bios
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STAGE2_SECTOR=34
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.PHONY: all
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all: $(BIOS_BUILD)/bios.mbr.bin $(BIOS_BUILD)/bios.stage2.bin
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.PHONY: clean
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clean:
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rm -drf $(BUILD)
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include bios.mk
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# Compile bootloader as library
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LIB_SRC = ./bootloader/Cargo.toml ./bootloader/Cargo.lock $(shell find ./bootloader/src -type f)
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$(BUILD)/bios.lib: $(LIB_SRC)
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@mkdir -p $(BUILD)
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env RUSTFLAGS="-C soft-float" \
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cargo rustc \
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--manifest-path="./bootloader/Cargo.toml" \
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-Z build-std=core,alloc \
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-Z build-std-features=compiler-builtins-mem \
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--target "./bootloader/targets/x86-unknown-none.json" \
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--lib \
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--release \
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-- \
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--emit link="$(CURDIR)/$@"
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# Link bootloader
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BIOS_LD = ./bootloader/linkers/x86-unknown-none.ld
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$(BUILD)/bios.elf: $(BUILD)/bios.lib $(BIOS_LD)
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ld \
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-m elf_i386 \
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--gc-sections \
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-z max-page-size=0x1000 \
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-T "$(BIOS_LD)" \
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-o "$@" \
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"$<"
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objcopy --only-keep-debug "$@" "$@.sym"
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objcopy --strip-debug "$@"
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