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Correctly determine size of MBR partition

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Jeremy Soller 2020-01-20 09:29:37 -07:00
parent 30a9278cfd
commit ed5c8eb92c
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GPG key ID: E988B49EE78A7FB1
1 changed files with 2 additions and 3 deletions
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5
mk/disk.mk
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@ -6,11 +6,10 @@ build/harddrive.bin: build/filesystem.bin bootloader/$(ARCH)/**
nasm -f bin -o $@ -D ARCH_$(ARCH) -D FILESYSTEM=$< -ibootloader/$(ARCH)/ bootloader/$(ARCH)/disk.asm
build/harddrive-mbr.bin: build/filesystem.bin bootloader/$(ARCH)/**
# TODO: Determine the correct size
nasm -f bin -o build/bootsector.bin -D ARCH_$(ARCH) -ibootloader/$(ARCH)/ bootloader/$(ARCH)/disk.asm
dd if=/dev/zero of=$@.partial bs=1M count=384
dd if=/dev/zero of=$@.partial bs=1M count=$$(expr $$(du -m $< | cut -f1) + 2)
parted -s -a minimal $@.partial mklabel msdos
parted -s -a minimal $@.partial mkpart primary 2048s 786431s
parted -s -a minimal $@.partial mkpart primary 2048s $$(expr $$(du -m $< | cut -f1) \* 2048 + 2048)s
dd if=build/bootsector.bin of=$@.partial bs=1 count=446 conv=notrunc
dd if=build/bootsector.bin of=$@.partial bs=512 skip=1 seek=1 conv=notrunc
dd if=$< of=$@.partial bs=1M seek=1 conv=notrunc