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1#!/usr/bin/perl
2## -----------------------------------------------------------------------
3##
4##   Copyright 2001-2008 H. Peter Anvin - All Rights Reserved
5##
6##   This program is free software; you can redistribute it and/or modify
7##   it under the terms of the GNU General Public License as published by
8##   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
9##   Boston MA 02111-1307, USA; either version 2 of the License, or
10##   (at your option) any later version; incorporated herein by reference.
11##
12## -----------------------------------------------------------------------
13
14#
15# Postprocess the memdisk binary.  Used during the 'make' process.
16# We write memdisk16.bin out to the final memdisk kernel, pad it to an
17# integral 512-byte sector length, write this number of sectors into the
18# kernel header field "setup_sects", then append memdisk32.bin
19
20eval { use bytes; };
21
22($out,$file16,$file32) = @ARGV;
23
24open(OUT, "> $out\0") or die "$0: Cannot create file: $out\n";
25eval { binmode OUT; };
26open(FILE, "< $file16\0") or die "$0: Cannot open file: $file16\n";
27eval { binmode FILE };
28
29@info = stat(FILE);
30$size = $info[7];
31
32$sectors = ($size + 511) >> 9;
33$xsize = $sectors << 9;
34
35read(FILE, $f16, $size);
36
37print OUT $f16;
38
39if ( $size != $xsize ) {
40    # Pad to a sector boundary
41    print OUT "\0" x ($xsize-$size);
42}
43
44seek(OUT, 0x1f1, SEEK_SET);	# setup_sects
45# All sectors are setup except the first
46print OUT pack("C", $sectors-1);
47
48seek(OUT, $xsize, SEEK_SET);
49close(FILE);
50
51open(FILE, "+< $file32\0") or die "$0: Cannot open file: $file32\n";
52
53while ( ($n = read(FILE, $f32, 65536)) > 0 ) {
54    print OUT $f32;
55}
56
57close(FILE);
58close(OUT);
59