Initial support for auxilliary data vector

Initial support for the auxillary data vector, a storage mechanism
intended to support boot-once and similar features.

2 files changed, 54 insertions, 0 deletions

diff --git a/com32/samples/Makefile b/com32/samples/Makefile
index e14e08f1..197e9114 100644
--- a/com32/samples/Makefile
+++ b/com32/samples/Makefile
@@ -45,6 +45,7 @@ all:	hello.c32 cat.c32 resolv.c32 vesainfo.c32 serialinfo.c32 \
 	localboot.c32 \
 	fancyhello.c32 fancyhello.lnx \
 	keytest.c32 keytest.lnx \
+	advdump.c32
 
 .PRECIOUS: %.o
 %.o: %.S
diff --git a/com32/samples/advdump.c b/com32/samples/advdump.c
new file mode 100644
index 00000000..f50401b9
--- /dev/null
+++ b/com32/samples/advdump.c
@@ -0,0 +1,53 @@
+/* ----------------------------------------------------------------------- *
+ *
+ *   Copyright 2007 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.
+ *
+ * ----------------------------------------------------------------------- */
+
+/*
+ * advdump.c
+ *
+ * Dump the contents of the syslinux ADV
+ */
+
+#include <stdio.h>
+#include <console.h>
+#include <syslinux/adv.h>
+#include <string.h>
+
+int main(void)
+{
+  uint8_t *p, *ep;
+  size_t s = syslinux_adv_size();
+  char buf[256];
+
+  openconsole(&dev_stdcon_r, &dev_stdcon_w);
+
+  p = syslinux_adv_ptr();
+
+  printf("ADV size: %zd bytes at %p\n", s, p);
+
+  ep = p+s;			/* Need at least opcode+len */
+  while (p < ep-1 && *p) {
+    int t = *p++;
+    int l = *p++;
+
+    if (p+l > ep)
+      break;
+
+    memcpy(buf, p, l);
+    buf[l] = '\0';
+
+    printf("ADV %3d: \"%s\"\n", t, buf);
+
+    p += l;
+  }
+
+  return 0;
+}