64 lines
1.7 KiB
Perl
Executable File
64 lines
1.7 KiB
Perl
Executable File
#!/usr/bin/perl -w
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#
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# Program to apply an efi header to an ia64 etherboot file.
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#
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# GPL Eric Biederman 2002
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#
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use strict;
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use bytes;
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main(@ARGV);
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sub usage
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{
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my ($err) = @_;
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print STDERR $err , "\n";
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die "Usage $0 prrefix file bss_size\n";
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}
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sub main
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{
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my ($prefix_name, $suffix_name, $bss_size) = @_;
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usage("No prefix") unless (defined($prefix_name));
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usage("No suffix") unless (defined($suffix_name));
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usage("No bss size") unless (defined($bss_size));
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open(PREFIX, "<$prefix_name") or die "Cannot open $prefix_name";
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open(SUFFIX, "<$suffix_name") or die "Cannot open $suffix_name";
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$/ = undef;
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my $prefix = <PREFIX>; close(PREFIX);
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my $suffix = <SUFFIX>; close(SUFFIX);
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# Payload sizes.
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my $payload_size = length($suffix);
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my $payload_bss = $bss_size;
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# Update the image size
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my $hdr_off = unpack("V",substr($prefix, 0x3c, 4));
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my $image_size_off = 0x050 + $hdr_off;
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my $img_mem_size_off = 0x0c0 + $hdr_off;
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my $img_size_off = 0x0c8 + $hdr_off;
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my $image_size = unpack("V", substr($prefix, $image_size_off, 4));
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my $img_mem_size = unpack("V", substr($prefix, $img_mem_size_off, 4));
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my $img_size = unpack("V", substr($prefix, $img_size_off, 4));
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$image_size += $payload_size + $payload_bss;
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$img_mem_size += $payload_size + $payload_bss;
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$img_size += $payload_size;
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substr($prefix, $image_size_off, 4) = pack("V", $image_size);
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substr($prefix, $img_mem_size_off, 4) = pack("V", $img_mem_size);
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substr($prefix, $img_size_off, 4) = pack("V", $img_size);
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#print(STDERR "image_size: $image_size\n");
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#print(STDERR "img_mem_size: $img_mem_size\n");
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#print(STDERR "img_size: $img_size\n");
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print $prefix;
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print $suffix;
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}
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