core/lstadjust.pl

   1 #!/usr/bin/perl
   2 #
   3 # Take a NASM list and map file and make the offsets in the list file
   4 # absolute.  This makes debugging a lot easier.
   5 #
   6 # Usage:
   7 #
   8 #  lstadjust.pl listfile mapfile outfile
   9 #
  10
  11 ($listfile, $mapfile, $outfile) = @ARGV;
  12
  13 open(LST, "< $listfile\0")
  14     or die "$0: cannot open: $listfile: $!\n";
  15 open(MAP, "< $mapfile\0")
  16     or die "$0: cannot open: $mapfile: $!\n";
  17 open(OUT, "> $outfile\0")
  18     or die "$0: cannot create: $outfile: $!\n";
  19
  20 %vstart = ();
  21
  22 while (defined($line = <MAP>)) {
  23     if ($line =~ /^\s*([0-9]+)\s+(\S+)\s+([0-9a-f]+)\s+([0-9a-f]+)\s+([0-9a-f]+)\s+([0-9a-f]+)\s+2\*\*([0-9]+)/i) {
  24         $vstart{$2} = hex $4;
  25     }
  26 }
  27 close(MAP);
  28
  29 $offset = 0;
  30 @ostack = ();
  31
  32 while (defined($line = <LST>)) {
  33     chomp $line;
  34
  35     $source = substr($line, 40);
  36     if ($source =~ /^([^;]*);/) {
  37         $source = $1;
  38     }
  39
  40     ($label, $op, $arg, $tail) = split(/\s+/, $source);
  41     if ($op =~ /^(|\[)section$/i) {
  42         $offset = $vstart{$arg};
  43     } elsif ($op =~ /^(absolute|\[absolute)$/i) {
  44         $offset = 0;
  45     } elsif ($op =~ /^struc$/i) {
  46         push(@ostack, $offset);
  47         $offset = 0;
  48     } elsif ($op =~ /^endstruc$/i) {
  49         $offset = pop(@ostack);
  50     }
  51
  52     if ($line =~ /^(\s*[0-9]+ )([0-9A-F]{8})(\s.*)$/) {
  53         $line = sprintf("%s%08X%s", $1, (hex $2)+$offset, $3);
  54     }
  55
  56     print OUT $line, "\n";
  57 }