Josh Holtrop
0adc6e395c
GRUB is not identifying the kernel as multiboot compatible. Possibly because I am using x86_64 instead of i686. Need to investigate further.
72 lines
2.8 KiB
Plaintext
72 lines
2.8 KiB
Plaintext
configure do
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check_c_compiler "x86_64-elf-gcc", on_fail: "Install cross compiler from x86_64-cross directory"
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check_program "genext2fs"
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check_program "grub-mkstandalone"
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check_program "mformat", on_fail: "Install the mtools package"
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end
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build do
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require "tmpdir"
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# EFI (w/ GRUB) partition size (MiB)
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EFI_PART_SIZE = 8
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# HOS partition size (MiB)
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HOS_PART_SIZE = 4
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class Image < Builder
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def run(options)
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unless @cache.up_to_date?(@target, nil, @sources, @env)
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print_run_message("Generating disk image #{@target}", nil)
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Dir.mktmpdir do |tmpdir|
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# Build a standalone GRUB.
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File.open("#{tmpdir}/grub.cfg", "wb") do |fh|
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fh.write(<<EOF)
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insmod part_gpt
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configfile (hd0,gpt2)/grub.cfg
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EOF
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end
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system(*%W[grub-mkstandalone -O x86_64-efi -o #{tmpdir}/BOOTX64.EFI boot/grub/grub.cfg=#{tmpdir}/grub.cfg])
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# Create EFI partition.
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system(*%W[dd if=/dev/zero of=#{tmpdir}/efi.part bs=1M count=#{EFI_PART_SIZE}], err: "/dev/null")
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system(*%W[mformat -i #{tmpdir}/efi.part ::])
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system(*%W[mmd -i #{tmpdir}/efi.part ::/EFI])
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system(*%W[mmd -i #{tmpdir}/efi.part ::/EFI/BOOT])
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system(*%W[mcopy -i #{tmpdir}/efi.part #{tmpdir}/BOOTX64.EFI ::/EFI/BOOT])
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# Create ext2 HOS partition.
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FileUtils.mkdir_p("#{tmpdir}/ext2")
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@sources.each do |source|
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FileUtils.cp(source, "#{tmpdir}/ext2")
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end
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File.open("#{tmpdir}/ext2/grub.cfg", "wb") do |fh|
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fh.write(<<EOF)
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insmod part_gpt
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insmod multiboot
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set root=(hd0,gpt2)
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multiboot /hos.elf
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EOF
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end
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system(*%W[genext2fs -b #{HOS_PART_SIZE * 1024} -d #{tmpdir}/ext2 #{tmpdir}/ext2.part])
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# Create full disk image.
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system(*%W[dd if=/dev/zero of=#{@target} bs=1M count=#{EFI_PART_SIZE + HOS_PART_SIZE + 2}], err: "/dev/null")
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system(*%W[parted -s #{@target} mklabel gpt])
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system(*%W[parted -s #{@target} mkpart efi 1MiB #{EFI_PART_SIZE + 1}MiB])
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system(*%W[parted -s #{@target} mkpart hos #{EFI_PART_SIZE + 1}MiB #{EFI_PART_SIZE + HOS_PART_SIZE + 1}MiB])
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system(*%W[dd if=#{tmpdir}/efi.part of=#{@target} bs=1M seek=1 conv=notrunc], err: "/dev/null")
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system(*%W[dd if=#{tmpdir}/ext2.part of=#{@target} bs=1M seek=#{1 + EFI_PART_SIZE} conv=notrunc], err: "/dev/null")
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end
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@cache.register_build(@target, nil, @sources, @env)
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end
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true
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end
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end
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Environment.new do |env|
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env.add_builder(Image)
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env["CCFLAGS"] += %w[-ffreestanding -Wall -O2]
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env["LDFLAGS"] += %w[-ffreestanding -nostdlib -T src/link.ld]
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env["LIBS"] += %w[gcc]
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env.Program("^/hos.elf", glob("src/**/*.{S,c}"))
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env.Image("build/hos.img", %w[^/hos.elf])
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end
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end
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