minix/lib/libsys/stacktrace.c

   1 /*
   2 stacktrace.c
   3
   4 Created:        Jan 19, 1993 by Philip Homburg
   5
   6 Copyright 1995 Philip Homburg
   7 */
   8
   9 #include <stdio.h>
  10 #include <string.h>
  11 #include <minix/sysutil.h>
  12
  13 typedef unsigned int reg_t;
  14
  15 extern reg_t get_bp(void);
  16
  17 void util_stacktrace(void)
  18 {
  19 #if USE_SYSDEBUG
  20         reg_t bp, pc, hbp;
  21
  22         bp= get_bp();
  23         while(bp)
  24         {
  25                 pc= ((reg_t *)bp)[1];
  26                 hbp= ((reg_t *)bp)[0];
  27                 printf("0x%lx ", (unsigned long) pc);
  28                 if (hbp != 0 && hbp <= bp)
  29                 {
  30                         printf("0x%lx ", (unsigned long) -1);
  31                         break;
  32                 }
  33                 bp= hbp;
  34         }
  35         printf("\n");
  36 #endif /* USE_SYSDEBUG */
  37 }
  38