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#!/usr/bin/perl
foreach $f (@ARGV) {
open(FILE, $f) || die("Cannot open $f");
seek(FILE, -16, 2);
$num_sections = do read_int();
read(FILE, $magic, 12);
seek(FILE, -16 - 8 * $num_sections, 2);
@secname = ();
@seclength = ();
%length = ();
for ($i = 0; $i < $num_sections; $i++) {
read(FILE, $sec, 4);
$secname[$i] = $sec;
$seclength[$i] = do read_int();
$length{$sec} = $seclength[$i];
}
print $f, ":\n" if ($#ARGV > 0);
$path =
$length{'RNTM'} > 0 ?
do read_section('RNTM') :
"(default runtime)\n";
printf ("\tcode: %-7d data: %-7d symbols: %-7d debug: %-7d\n",
$length{'CODE'}, $length{'DATA'},
$length{'SYMB'}, $length{'DBUG'});
printf ("\tmagic number: %s runtime system: %s",
$magic, $path);
close(FILE);
}
sub read_int {
read(FILE, $buff, 4) == 4 || die("Truncated bytecode file $f");
@int = unpack("C4", $buff);
return ($int[0] << 24) + ($int[1] << 16) + ($int[2] << 8) + $int[3];
}
sub read_section {
local ($sec) = @_;
local ($i, $ofs, $data);
for ($i = $num_sections - 1; $i >= 0; $i--) {
$ofs += $seclength[$i];
if ($secname[$i] eq $sec) {
seek(FILE, -16 - 8 * $num_sections - $ofs, 2);
read(FILE, $data, $seclength[$i]);
return $data;
}
}
return '';
}
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