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#!/usr/bin/perl
#
# Take a NASM list and map file and make the offsets in the list file
# absolute. This makes debugging a lot easier.
#
# Usage:
#
# lstadjust.pl listfile mapfile outfile
#
($listfile, $mapfile, $outfile) = @ARGV;
open(LST, "< $listfile\0")
or die "$0: cannot open: $listfile: $!\n";
open(MAP, "< $mapfile\0")
or die "$0: cannot open: $mapfile: $!\n";
open(OUT, "> $outfile\0")
or die "$0: cannot create: $outfile: $!\n";
%vstart = ();
undef $sec;
while (defined($line = <MAP>)) {
chomp $line;
if ($line =~ /^\-+\s+Section\s+(\S+)\s+\-/) {
$sec = $1;
}
next unless (defined($sec));
if ($line =~ /^vstart:\s+([0-9a-f]+)/i) {
$vstart{$sec} = hex $1;
}
}
close(MAP);
$offset = 0;
@ostack = ();
while (defined($line = <LST>)) {
chomp $line;
$source = substr($line, 40);
if ($source =~ /^([^;]*);/) {
$source = $1;
}
($label, $op, $arg, $tail) = split(/\s+/, $source);
if ($op =~ /^(|\[)section$/i) {
$offset = $vstart{$arg};
} elsif ($op =~ /^(absolute|\[absolute)$/i) {
$offset = 0;
} elsif ($op =~ /^struc$/i) {
push(@ostack, $offset);
$offset = 0;
} elsif ($op =~ /^endstruc$/i) {
$offset = pop(@ostack);
}
if ($line =~ /^(\s*[0-9]+ )([0-9A-F]{8})(\s.*)$/) {
$line = sprintf("%s%08X%s", $1, (hex $2)+$offset, $3);
}
print OUT $line, "\n";
}
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