tree 7d8908a1978eff8860fcc84ce936a15809971308
parent 8b64cc7fba868ddec45895382eb52df005f4f319
author Michael Brown <mcb30@ipxe.org> 1409049762 +0100
committer Michael Brown <mcb30@ipxe.org> 1409062676 +0100

[util] Use PCI length field to obtain length of individual images

Option::ROM currently uses the initialisation length field (single
byte at offset 0x02) to determine the length of a ROM image within a
multi-image ROM file.  For PCI ROM images with a code type other than
0, the initialisation length field may not be present.

Fix by using the PCI header's image length field instead.  Note that
this does not prevent us from correctly handling ISA ROMs, since ISA
ROMs do not support multiple images within a single ROM BAR anyway.

Inspired-by: Swift Geek <swiftgeek@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>