A network boot loader
a515f8e718
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=1926561 When combining BIOS and EFI roms, the EfiRom utility from edk2-tools clears the "last image indicator" in the BIOS ROM image header, and then updates the checksum in the last byte of the BIOS ROM image. However, EfiRom does not update any internal, iPXE-specific checksums in the BIOS ROM image. In the rare case when the checksum residing in the BIOS ROM's last byte does not fall into such padding that was added previously by "util/padimg.pl" -- that is, if the BIOS image is a whole multiple of 512 bytes even without padding --, then the recalculation of *only* the last byte invalidates the LZMA stream and/or an internal CRC32 checksum that are embedded elsewhere in the BIOS ROM. Consequently, iPXE fails to LZMA-decompress itself when booted on SeaBIOS. iPXE's own "util/catrom.pl" utility knows how to update internal (iPXE-specific) checksums; use this tool for combining the BIOS and EFI images. ( In theory we could abandon EfiRom from edk2-tools altogether, and prepare even the stand-alone EFI driver image with iPXE-internal tooling. For this, we'd only have to build the "bin-x86_64-efi/${rom}.efirom" target, in place of the "bin-x86_64-efi/${rom}.efidrv" target. The iPXE build would automatically convert the latter into the former with the "util/efirom" program. Unfortunately, "util/efirom" does not support "EFI compression", and that would cause us to nearly exhaust our 256 KB "migration buffer". Therefore, continue using EfiRom, but only for compressing the "efidrv" binary to a single (not combined) EFI ROM image. Perform only the combination step with "util/catrom.pl". ) Signed-off-by: Laszlo Ersek <lersek@redhat.com> |
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| .gitignore | ||
| 0001-build-customize-configuration.patch | ||
| 0002-Use-spec-compliant-timeouts.patch | ||
| ipxe.spec | ||
| sources | ||