63 lines
1.7 KiB
Bash
63 lines
1.7 KiB
Bash
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#!/bin/sh
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set -e
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cd ${BINARIES_DIR}
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# GPT partition type UUIDs
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esp_type=c12a7328-f81f-11d2-ba4b-00a0c93ec93b
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linux_type=44479540-f297-41b2-9af7-d131d5f0458a
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# Partition UUIDs
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efi_part_uuid=$(uuidgen)
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root_part_uuid=$(uuidgen)
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# Boot partition offset and size, in 512-byte sectors
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efi_part_start=64
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efi_part_size=32768
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# Rootfs partition offset and size, in 512-byte sectors
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root_part_start=$(( efi_part_start + efi_part_size ))
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root_part_size=$(( $(stat -c %s rootfs.ext2) / 512 ))
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first_lba=34
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last_lba=$(( root_part_start + root_part_size ))
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# Disk image size in 512-byte sectors
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image_size=$(( last_lba + first_lba ))
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cat > efi-part/EFI/BOOT/grub.cfg <<EOF
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set default="0"
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set timeout="5"
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menuentry "Buildroot" {
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linux /bzImage root=PARTUUID=$root_part_uuid rootwait console=tty1
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}
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EOF
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# Create EFI system partition
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rm -f efi-part.vfat
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dd if=/dev/zero of=efi-part.vfat bs=512 count=0 seek=$efi_part_size
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mkdosfs efi-part.vfat
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mcopy -bsp -i efi-part.vfat efi-part/startup.nsh ::startup.nsh
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mcopy -bsp -i efi-part.vfat efi-part/EFI ::EFI
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mcopy -bsp -i efi-part.vfat bzImage ::bzImage
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rm -f disk.img
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dd if=/dev/zero of=disk.img bs=512 count=0 seek=$image_size
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sfdisk disk.img <<EOF
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label: gpt
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label-id: $(uuidgen)
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device: /dev/foobar0
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unit: sectors
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first-lba: $first_lba
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last-lba: $last_lba
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/dev/foobar0p1 : start=$efi_part_start, size=$efi_part_size, type=$esp_type, uuid=$efi_part_uuid, name="efi-part.vfat"
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/dev/foobar0p2 : start=$root_part_start, size=$root_part_size, type=$linux_type, uuid=$root_part_uuid, name="rootfs.ext2"
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EOF
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dd if=efi-part.vfat of=disk.img bs=512 count=$efi_part_size seek=$efi_part_start conv=notrunc
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dd if=rootfs.ext2 of=disk.img bs=512 count=$root_part_size seek=$root_part_start conv=notrunc
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