65 lines
2.1 KiB
Perl
65 lines
2.1 KiB
Perl
#!/usr/bin/env perl
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my $quiet = 1;
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unpack("L",pack("N",1))!=1 || die "only little-endian hosts are supported";
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# first argument can specify custom suffix...
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$suffix=(@ARGV[0]=~/^\$/) ? shift(@ARGV) : "\$m";
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#################################################################
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# rename segments in COFF modules according to %map table below #
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%map=( ".text" => "fipstx$suffix", #
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".text\$"=> "fipstx$suffix", #
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".rdata"=> "fipsrd$suffix", #
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".data" => "fipsda$suffix" ); #
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#################################################################
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# collect file list
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foreach (@ARGV) {
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if (/\*/) { push(@files,glob($_)); }
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else { push(@files,$_); }
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}
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use Fcntl;
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use Fcntl ":seek";
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foreach (@files) {
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$file=$_;
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print "processing $file\n" unless $quiet;
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sysopen(FD,$file,O_RDWR|O_BINARY) || die "sysopen($file): $!";
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# read IMAGE_DOS_HEADER
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sysread(FD,$mz,64)==64 || die "$file is too short";
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@dos_header=unpack("a2C58I",$mz);
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if (@dos_header[0] eq "MZ") {
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$e_lfanew=pop(@dos_header);
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sysseek(FD,$e_lfanew,SEEK_SET) || die "$file is too short";
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sysread(FD,$Magic,4)==4 || die "$file is too short";
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unpack("I",$Magic)==0x4550 || die "$file is not COFF image";
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} elsif ($file =~ /\.obj$/i) {
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# .obj files have no IMAGE_DOS_HEADER
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sysseek(FD,0,SEEK_SET) || die "unable to rewind $file";
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} else { next; }
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# read IMAGE_FILE_HEADER
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sysread(FD,$coff,20)==20 || die "$file is too short";
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($Machine,$NumberOfSections,$TimeDateStamp,
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$PointerToSymbolTable,$NumberOfSysmbols,
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$SizeOfOptionalHeader,$Characteristics)=unpack("SSIIISS",$coff);
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# skip over IMAGE_OPTIONAL_HEADER
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sysseek(FD,$SizeOfOptionalHeader,SEEK_CUR) || die "$file is too short";
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# traverse IMAGE_SECTION_HEADER table
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for($i=0;$i<$NumberOfSections;$i++) {
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sysread(FD,$SectionHeader,40)==40 || die "$file is too short";
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($Name,@opaque)=unpack("Z8C*",$SectionHeader);
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if ($map{$Name}) {
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sysseek(FD,-40,SEEK_CUR) || die "unable to rewind $file";
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syswrite(FD,pack("a8C*",$map{$Name},@opaque))==40 || die "syswrite failed: $!";
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printf " %-8s -> %.8s\n",$Name,$map{$Name} unless $quiet;
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}
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}
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close(FD);
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}
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