aboutsummaryrefslogtreecommitdiffstats
path: root/memdump/conio.c
diff options
context:
space:
mode:
authorH. Peter Anvin <hpa@zytor.com>2007-09-21 16:52:35 -0700
committerH. Peter Anvin <hpa@zytor.com>2007-09-21 16:52:35 -0700
commit5a16eeb519c87fa4c437e838af81731b8d355052 (patch)
treef59258a720429d5ad8beaf2070f73cab6a187077 /memdump/conio.c
parent31daeb2ddb972dc70b929da1c93288e821c87ed7 (diff)
downloadsyslinux-elf-5a16eeb519c87fa4c437e838af81731b8d355052.tar.gz
syslinux-elf-5a16eeb519c87fa4c437e838af81731b8d355052.tar.xz
syslinux-elf-5a16eeb519c87fa4c437e838af81731b8d355052.zip
memdump: a debugging utility to dump memory over a serial port
A memory-dumping utility which runs in real mode. Thus, it can be used to get memory dumps from a relatively pristine system.
Diffstat (limited to 'memdump/conio.c')
-rw-r--r--memdump/conio.c42
1 files changed, 42 insertions, 0 deletions
diff --git a/memdump/conio.c b/memdump/conio.c
new file mode 100644
index 00000000..4d58dcbd
--- /dev/null
+++ b/memdump/conio.c
@@ -0,0 +1,42 @@
+/* ----------------------------------------------------------------------- *
+ *
+ * Copyright 2001-2004 H. Peter Anvin - All Rights Reserved
+ *
+ * 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.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * conio.c
+ *
+ * Output to the screen
+ */
+
+#include <stdarg.h>
+#include "mystuff.h"
+
+int putchar(int ch)
+{
+ if ( ch == '\n' )
+ putchar('\r');
+ asm("movb $0x02,%%ah ; int $0x21" : : "d" (ch));
+ return ch;
+}
+
+/* Note: doesn't put '\n' like the stdc version does */
+int puts(const char *s)
+{
+ int count = 0;
+
+ while ( *s ) {
+ putchar(*s);
+ count++;
+ s++;
+ }
+
+ return count;
+}