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/*
* some bits copied from mprof by Ben Zorn
*
* Copyright (c) 1995 Jeffrey Hsu
*/
/* $XFree86: xc/util/memleak/getreti386.c,v 3.4 2000/12/08 21:44:05 keithp Exp $ */
#define get_current_fp(first_local) ((unsigned)&(first_local) + 4)
#define prev_fp_from_fp(fp) *((unsigned *) fp)
#define ret_addr_from_fp(fp) *((unsigned *) (fp+4))
#ifdef __FreeBSD__
#define CRT0_ADDRESS 0x10d3
#endif
#if defined(__NetBSD__) || defined(__OpenBSD__)
#define CRT0_ADDRESS 0x109a
#endif
#ifdef linux
#define CRT0_ADDRESS 0x804a3d0
#endif
static unsigned long
junk (int *foo)
{
return (unsigned long) foo + 4;
}
void
getStackTrace(unsigned long *results, int max)
{
int first_local;
unsigned long fp, ret_addr;
first_local = 0;
fp = junk(&first_local);
fp = get_current_fp(first_local);
ret_addr = ret_addr_from_fp(fp);
while (ret_addr > CRT0_ADDRESS && max-- > 1) {
*results++ = ret_addr;
if (fp < (unsigned long) &first_local)
break;
fp = prev_fp_from_fp(fp);
if (!fp)
break;
if (fp < (unsigned long) &first_local)
break;
ret_addr = ret_addr_from_fp(fp);
}
*results++ = 0;
}
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