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authornl6720 <nl6720@gmail.com>2020-10-04 16:13:22 +0300
committernl6720 <nl6720@gmail.com>2020-10-24 13:15:37 +0300
commit729d16b48c99c5d9b23a89123ecde4ecacfa8705 (patch)
treee065849fe92c6771d325ad8e2f377ff73b819925 /configs/baseline
parent5f4260fcb11b6b7ab5412b00bea282808c349a0c (diff)
Move FAT image to a separate partition outside the ISO 9660 file system
Support bios.syslinux.eltorito boot mode without bios.syslinux.mbr. bios.syslinux.mbr does not work without bios.syslinux.eltorito because -isohybrid-mbr requires the El Torito boot image. Support uefi-x64.systemd-boot.esp boot mode without uefi-x64.systemd-boot.eltorito and vice versa. If uefi-x64.systemd-boot.eltorito is used without uefi-x64.systemd-boot.esp, the El Torito boot image will be placed in the ISO 9660 file system as before. Note that an ISO created with only uefi-x64.systemd-boot.eltorito will still be bootable as a "hard disk" on OVMF. OVMF will boot the El Torito image. This change has the following effect on the partition tables: - *.eltorito options add El Torito boot catalog entries. MBR and GPT are not affected. - uefi-x64.systemd-boot.esp creates a protective MBR partition table and a GPT table that includes a Linux filesystem data partition for the ISO 9660 volume, an EFI system partition and a Microsoft basic data partition that maps the 300 KiB padding added by xorriso. - bios.syslinux.mbr (without uefi-x64.systemd-boot.esp): adds a MBR partition table and maps the ISO 9660 volume as a partition of type 0x83. No GPT is produced. - bios.syslinux.mbr (with uefi-x64.systemd-boot.esp): adds an second partition in the MBR (after 0xEE) starting from sector 0 to sector 1 with type 0 and marks it as bootable. This violates the GPT specification, but allows some systems to succesfully boot in BIOS mode from GPT. Fixes https://gitlab.archlinux.org/archlinux/archiso/-/issues/49
Diffstat (limited to 'configs/baseline')
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