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
  12 typedef unsigned int reg_t;
  13
  14 extern reg_t get_bp(void);
  15
  16 void util_stacktrace(void)
  17 {
  18 #if USE_SYSDEBUG
  19         reg_t bp, pc, hbp;
  20
  21         bp= get_bp();
  22         while(bp)
  23         {
  24                 pc= ((reg_t *)bp)[1];
  25                 hbp= ((reg_t *)bp)[0];
  26                 printf("0x%lx ", (unsigned long) pc);
  27                 if (hbp != 0 && hbp <= bp)
  28                 {
  29                         printf("0x%lx ", (unsigned long) -1);
  30                         break;
  31                 }
  32                 bp= hbp;
  33         }
  34         printf("\n");
  35 #endif /* USE_SYSDEBUG */
  36 }
  37