1/*-
2 * Copyright (c) 2005 Antoine Brodin
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD$");
29
30#include <sys/systm.h>
31#include <sys/param.h>
32#include <sys/proc.h>
33#include <sys/stack.h>
34
35#include <machine/vmparam.h>
36#include <machine/pcb.h>
37#include <machine/stack.h>
38
39static void
40stack_capture(struct stack *st, u_int32_t *frame)
41{
42	vm_offset_t callpc;
43
44	stack_zero(st);
45	while (1) {
46		if (!INKERNEL(frame))
47			break;
48		callpc = frame[FR_SCP];
49		if (stack_put(st, callpc) == -1)
50			break;
51		frame = (u_int32_t *)(frame[FR_RFP]);
52	}
53}
54
55void
56stack_save_td(struct stack *st, struct thread *td)
57{
58	u_int32_t *frame;
59
60	if (TD_IS_SWAPPED(td))
61		panic("stack_save_td: swapped");
62	if (TD_IS_RUNNING(td))
63		panic("stack_save_td: running");
64
65	frame = (u_int32_t *)td->td_pcb->un_32.pcb32_r11;
66	stack_capture(st, frame);
67}
68
69void
70stack_save(struct stack *st)
71{
72	u_int32_t *frame;
73
74	frame = (u_int32_t *)__builtin_frame_address(0);
75	stack_capture(st, frame);
76}
77