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[util] Allow Option::ROM to understand and modify initialisation entry point

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Add support for manipulating the jump instruction that forms the
option ROM initialisation entry point, so that mergerom.pl can treat
it just like other entry points.

Add support for merging the initialisation entry point (and IBM BOFM
table) to mergerom.pl; this is another slightly icky but unfortunately
necessary GPL vs. NDA workaround.  When mergerom.pl replaces an entry
point in the original ROM, it now fills in the corresponding entry
point in the merged ROM with the original value; this allows (for
example) a merged initialisation entry point to do some processing and
then jump back to the original entry point.
This commit is contained in:
Michael Brown
2008-08-15 04:10:35 +01:00
parent 8f8f5acf09
commit 23bca8f9d8
3 changed files with 66 additions and 7 deletions
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src/util/disrom.pl
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@@ -38,6 +38,7 @@ die "ROM image truncated (is $filelength, should be $romlength)\n"
printf "ROM header:\n\n";
printf " Length:\t0x%02x (%d)\n", $rom->{length}, ( $rom->{length} * 512 );
printf " Checksum:\t0x%02x (0x%02x)\n", $rom->{checksum}, $rom->checksum;
printf " Init:\t\t0x%04x\n", $rom->{init};
printf " UNDI header:\t0x%04x\n", $rom->{undi_header};
printf " PCI header:\t0x%04x\n", $rom->{pci_header};
printf " PnP header:\t0x%04x\n", $rom->{pnp_header};