1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
|
/*
* Copyright (c) 1997-1999 University of Utah and the Flux Group.
* All rights reserved.
*
* This file is part of the Flux OSKit. The OSKit is free software, also known
* as "open source;" you can redistribute it and/or modify it under the terms
* of the GNU General Public License (GPL), version 2, as published by the Free
* Software Foundation (FSF). To explore alternate licensing terms, contact
* the University of Utah at csl-dist@cs.utah.edu or +1-801-585-3271.
*
* The OSKit is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GPL for more details. You should have
* received a copy of the GPL along with the OSKit; see the file COPYING. If
* not, write to the FSF, 59 Temple Place #330, Boston, MA 02111-1307, USA.
*/
/*
* Stores a stack backtrace in the provided buffer.
*
* XXX This should probably be made more generic and moved into
* stack_trace.c in libc.
*/
#include "memdebug.h"
void
memdebug_store_backtrace(unsigned *backtrace, int max_len)
{
unsigned *fp;
unsigned i;
asm volatile("mov %0,%%fp" : "=r" (fp));
if (fp)
fp = (int *)(*(fp - 3)); /* Skip frame for this function */
for (i = 0; i < max_len; i++)
{
if (fp)
{
backtrace[i] = fp[-1];
fp = (unsigned*)fp[-3];
}
else
backtrace[i] = 0;
}
}
|
