com32/samples/advdump.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2007-2008 H. Peter Anvin - All Rights Reserved
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation, Inc., 53 Temple Place Ste 330,
   8  *   Boston MA 02111-1307, USA; either version 2 of the License, or
   9  *   (at your option) any later version; incorporated herein by reference.
  10  *
  11  * ----------------------------------------------------------------------- */
  12
  13 /*
  14  * advdump.c
  15  *
  16  * Dump the contents of the syslinux ADV
  17  */
  18
  19 #include <stdio.h>
  20 #include <console.h>
  21 #include <syslinux/adv.h>
  22 #include <string.h>
  23
  24 int main(void)
  25 {
  26     uint8_t *p, *ep;
  27     size_t s = syslinux_adv_size();
  28     char buf[256];
  29
  30 #if 0
  31         /* this hangs! */
  32     openconsole(&dev_stdcon_r, &dev_stdcon_w);
  33 #else
  34         /* this works */
  35     openconsole(&dev_rawcon_r, &dev_ansiserial_w);
  36 #endif
  37
  38     p = syslinux_adv_ptr();
  39
  40     printf("ADV size: %zd bytes at %p\n", s, p);
  41
  42     ep = p + s;                 /* Need at least opcode+len */
  43     while (p < ep - 1 && *p) {
  44         int t = *p++;
  45         int l = *p++;
  46
  47         if (p + l > ep)
  48             break;
  49
  50         memcpy(buf, p, l);
  51         buf[l] = '\0';
  52
  53         printf("ADV %3d: \"%s\"\n", t, buf);
  54
  55         p += l;
  56     }
  57
  58     return 0;
  59 }