nasm/nsis/getpearch.pl

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#!/usr/bin/perl
#
# Get the appropriate variables to make an NSIS installer file
# based on the PE architecture of a specific file
#
use strict;
use bytes;
my %archnames = (
0x01de => 'am33',
0x8664 => 'x64',
0x01c0 => 'arm32',
0x01c4 => 'thumb',
0xaa64 => 'arm64',
0x0ebc => 'efi',
0x014c => 'x86',
0x0200 => 'ia64',
0x9041 => 'm32r',
0x0266 => 'mips16',
0x0366 => 'mips',
0x0466 => 'mips16',
0x01f0 => 'powerpc',
0x01f1 => 'powerpc',
0x0166 => 'mips',
0x01a2 => 'sh3',
0x01a3 => 'sh3',
0x01a6 => 'sh4',
0x01a8 => 'sh5',
0x01c2 => 'arm32',
0x0169 => 'wcemipsv2'
);
my ($file) = @ARGV;
open(my $fh, '<', $file)
or die "$0: cannot open file: $file: $!\n";
read($fh, my $mz, 2);
exit 1 if ($mz ne 'MZ');
exit 0 unless (seek($fh, 0x3c, 0));
exit 0 unless (read($fh, my $pe_offset, 4) == 4);
$pe_offset = unpack("V", $pe_offset);
exit 1 unless (seek($fh, $pe_offset, 0));
read($fh, my $pe, 4);
exit 1 unless ($pe eq "PE\0\0");
exit 1 unless (read($fh, my $arch, 2) == 2);
$arch = $archnames{unpack("v", $arch)};
if (defined($arch)) {
print "!define ARCH ${arch}\n";
}
exit 1 unless (seek($fh, 14, 1));
exit 1 unless (read($fh, my $auxheaderlen, 2) == 2);
exit 1 unless (unpack("v", $auxheaderlen) >= 2);
exit 1 unless (seek($fh, 2, 1));
exit 1 unless (read($fh, my $petype, 2) == 2);
$petype = unpack("v", $petype);
if ($petype == 0x010b) {
# It is a 32-bit PE32 file
print "!define BITS 32\n";
print "!define GLOBALINSTDIR \$PROGRAMFILES\n";
} elsif ($petype == 0x020b) {
# It is a 64-bit PE32+ file
print "!define BITS 64\n";
print "!define GLOBALINSTDIR \$PROGRAMFILES64\n";
} else {
# No idea...
exit 1;
}
close($fh);
exit 0;