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authorGene Cumm <gene.cumm@gmail.com>2011-04-24 19:10:19 -0400
committerGene Cumm <gene.cumm@gmail.com>2011-12-31 23:08:27 -0500
commit883746f41134920ba797f83552156006dc78da2e (patch)
treebcf7d387cd7f5804a5af1c39e930f8fdc252f989 /diag
parent70d53d87a17c5802855fa1fb001987cd96e87c80 (diff)
downloadsyslinux-883746f41134920ba797f83552156006dc78da2e.tar.gz
syslinux-883746f41134920ba797f83552156006dc78da2e.tar.xz
syslinux-883746f41134920ba797f83552156006dc78da2e.zip
diag/geodsp: add mk-lba-img.pl
To be used to replace the native C binary
Diffstat (limited to 'diag')
-rwxr-xr-xdiag/geodsp/mk-lba-img.pl94
1 files changed, 94 insertions, 0 deletions
diff --git a/diag/geodsp/mk-lba-img.pl b/diag/geodsp/mk-lba-img.pl
new file mode 100755
index 00000000..59ef4f0f
--- /dev/null
+++ b/diag/geodsp/mk-lba-img.pl
@@ -0,0 +1,94 @@
+## -----------------------------------------------------------------------
+##
+## Copyright 2011 Gene Cumm
+##
+## This program is free software; you can redistribute it and/or modify
+## it under the terms of the GNU General Public License as published by
+## the Free Software Foundation, Inc., 53 Temple Place Ste 330,
+## Boston MA 02111-1307, USA; either version 2 of the License, or
+## (at your option) any later version; incorporated herein by reference.
+##
+## -----------------------------------------------------------------------
+
+##
+## mk-lba-img.pl
+##
+## Make an image where each sector contains the LBA of the sector with
+## a head of an input file.
+##
+
+# use bytes;
+
+use constant SECTOR_SIZE => 512;
+use constant LBA_SIZE => 8;
+use constant LONG_SIZE => 4;
+use constant NUM_SECTORS => (256*63+1);
+# use constant NUM_SECTORS => 5;
+use constant DEBUG => 1;
+
+# sub dprint
+# {
+# if (DEBUG) {
+# print($_);
+# }
+# }
+
+($ifilen, $ofilen) = @ARGV;
+
+if ((!defined($ifilen)) || ($ifilen eq "-")) { #
+ print(STDERR "Using stdin\n");
+ $IFILE = STDIN;
+} else {
+ open($IFILE, '<', $ifilen) or die "open:$!";
+ print(STDERR "Using $ifilen\n");
+}
+
+binmode($ifile);
+
+if (!defined($ofilen)) {
+ $OFILE = STDOUT;
+} else {
+ open($OFILE, '>', $ofilen) or die "open:$!";
+ print(STDERR "Using $ofilen\n");
+}
+
+binmode($OFILE);
+
+# $pk0 = pack('L', 0);
+$n_long = (SECTOR_SIZE/LONG_SIZE);
+$n_lba = (SECTOR_SIZE/LBA_SIZE);
+
+$len=0;
+while ( read($IFILE, $ch, 1) ) {
+ print($OFILE $ch);
+ $len++;
+}
+$tail = (SECTOR_SIZE - ($len % SECTOR_SIZE)) % SECTOR_SIZE;
+$ch = pack("C", 0);
+print("Len: $len\ttail: $tail\n");
+for ($i=0; $i<$tail; $i++) {
+ print($OFILE $ch);
+}
+
+$st = ($len + $tail) / SECTOR_SIZE;
+
+for ($i=$st; $i<(NUM_SECTORS); $i++) {
+ @ia = ();
+ for ($j=0; $j< $n_lba; $j++) {
+ push(@ia, $i, 0);
+ }
+ @ipk = pack("L[$n_long]", @ia);
+ # There is a 64-bit INT conversion but it normally isn't usable
+ # on a 32-bit platform
+ print($OFILE @ipk); # Gently simulate a 64-bit LBA
+}
+
+if (defined($ifilen) && (!($ifilen eq "-"))) {
+ close($IFILE);
+}
+
+if (defined($ofilen)) {
+ close($OFILE);
+}
+
+exit 0;