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[util] Rewrite catrom.pl to use Option::ROM library 

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown 2012-06-11 01:42:33 +01:00
parent f2e5f8813e
commit 12be8bc544
1 changed files with 15 additions and 34 deletions
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49
src/util/catrom.pl
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@ -3,46 +3,27 @@
use warnings;
use strict;
use bytes;
use FindBin;
use lib "$FindBin::Bin";
use Option::ROM qw ( :all );
use constant MAX_ROM_LEN => 1024*1024;
use constant PCI_OFF => 0x18;
use constant INDICATOR_OFF => 0x15;
my $total_len = 0;
my @romfiles = @ARGV
or die "Usage: $0 rom-file-1 rom-file-2 ... > multi-rom-file\n";
while ( my $romfile = shift @romfiles ) {
my $last = @romfiles ? 0 : 1;
open ROM, "<$romfile" or die "Could not open $romfile: $!\n";
my $len = read ( ROM, my $romdata, MAX_ROM_LEN )
or die "Could not read $romfile: $!\n";
close ROM;
# Read ROM file
my $rom = new Option::ROM;
$rom->load ( $romfile );
die "$romfile is not a ROM file\n"
unless substr ( $romdata, 0, 2 ) eq "\x55\xAA";
# Tag final image as non-final in all except the final ROM
if ( @romfiles ) {
my $image = $rom;
$image = $image->next_image() while $image->next_image();
$image->pci_header->{last_image} &= ~PCI_LAST_IMAGE;
$image->fix_checksum();
}
( my $checklen ) = unpack ( 'C', substr ( $romdata, 2, 1 ) );
$checklen *= 512;
die "$romfile has incorrect length field $checklen (should be $len)\n"
unless $len == $checklen;
( my $pci ) = unpack ( 'v', substr ( $romdata, PCI_OFF, 2 ) );
die "Invalid PCI offset field in $romfile\n"
if $pci >= $len;
die "No PCIR signature in $romfile\n"
unless substr ( $romdata, $pci, 4 ) eq "PCIR";
( my $indicator ) =
unpack ( 'C', substr ( $romdata, $pci + INDICATOR_OFF, 1 ) );
my $msg = sprintf ( "$romfile: indicator was %02x, ", $indicator );
$indicator &= ! ( 1 << 7 );
$indicator |= ( $last << 7 );
$msg .= sprintf ( "now %02x\n", $indicator );
substr ( $romdata, $pci + INDICATOR_OFF, 1 ) = pack ( 'C', $indicator );
warn $msg;
print $romdata;
# Write ROM file to STDOUT
$rom->save ( "-" );
}