57 lines
1.6 KiB
Makefile
57 lines
1.6 KiB
Makefile
# SPDX-FileCopyrightText: 2022 Andrius Štikonas <andrius@stikonas.eu>
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#
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# SPDX-License-Identifier: GPL-3.0-or-later
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targets = hex0
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ESP_SIZE = 50 # MiB
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QEMU = qemu-system-x86_64
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OVMF_IMG = /usr/share/edk2-ovmf/OVMF_CODE.fd
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ESP_SIZE_SECTORS = $$(($(ESP_SIZE) * 2048))
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DISK_SIZE_SECTORS=$$(($(ESP_SIZE_SECTORS) + 2048 + 33))
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cc = clang
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cflags = -ffreestanding -MMD -mno-red-zone -std=c11 -target x86_64-unknown-windows -Wall -Werror -pedantic
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ld = lld-link
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lflags = -subsystem:efi_application -nodefaultlib -dll
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build_dir = build
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rootfs_dir = $(build_dir)/rootfs
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targets2 = $(addsuffix .efi, $(addprefix $(build_dir)/, $(targets)))
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$(build_dir)/%.efi : $(build_dir)/%.o
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$(ld) $(lflags) -entry:efi_main $< -out:$@
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$(build_dir)/%.o : %.c
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mkdir -p $(build_dir)
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$(cc) $(cflags) -c $< -o $@
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.PHONY : clean rootfs qemu
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qemu: $(build_dir)/disk.img $(OVMF_IMG)
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$(QEMU) -cpu qemu64 -enable-kvm -net none \
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-drive if=pflash,format=raw,unit=0,file=$(OVMF_IMG),readonly=on \
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-drive if=ide,format=raw,file=$<
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all : $(targets2)
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$(build_dir)/disk.img: $(build_dir)/esp.img
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dd if=/dev/zero of=$@ bs=512 count=$(DISK_SIZE_SECTORS)
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parted $@ -s -a minimal mklabel gpt
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parted $@ -s -a minimal mkpart EFI FAT32 2048s $(ESP_SIZE_SECTORS)s
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parted $@ -s -a minimal toggle 1 boot
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dd if=$< of=$@ bs=512 seek=2048 conv=notrunc
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$(build_dir)/esp.img: rootfs
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dd if=/dev/zero of=$@ bs=512 count=$(ESP_SIZE_SECTORS)
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mformat -i $@ -h 32 -t 32 -n 64 -c 1
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mcopy -s -i $@ $(rootfs_dir)/* ::
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rootfs: $(targets2)
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cp -R rootfs $(build_dir)
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mkdir -p $(rootfs_dir)/EFI/BOOT/
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cp $(build_dir)/hex0.efi $(rootfs_dir)/EFI/BOOT/BOOTX64.EFI
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clean:
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rm -rf $(build_dir)
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