stack_machdep.c revision 286396 
150534Smpp/*-
250534Smpp * Copyright (c) 2005 Antoine Brodin
326826Ssteve * All rights reserved.
420775Smpp *
520775Smpp * Redistribution and use in source and binary forms, with or without
620775Smpp * modification, are permitted provided that the following conditions
720775Smpp * are met:
820775Smpp * 1. Redistributions of source code must retain the above copyright
920775Smpp *    notice, this list of conditions and the following disclaimer.
1068965Sru * 2. Redistributions in binary form must reproduce the above copyright
1120775Smpp *    notice, this list of conditions and the following disclaimer in the
1220775Smpp *    documentation and/or other materials provided with the distribution.
1320775Smpp *
1420775Smpp * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
1599968Scharnier * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
1620775Smpp * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
1720775Smpp * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
1820775Smpp * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19128314Sbrueffer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20128314Sbrueffer * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21128314Sbrueffer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22128314Sbrueffer * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23128314Sbrueffer * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24128314Sbrueffer * SUCH DAMAGE.
25128314Sbrueffer */
2620775Smpp
2720775Smpp#include <sys/cdefs.h>
2820775Smpp__FBSDID("$FreeBSD: stable/10/sys/amd64/amd64/stack_machdep.c 286396 2015-08-07 04:31:02Z kib $");
2920775Smpp
3020775Smpp#include <sys/param.h>
3191842Skeramida#include <sys/systm.h>
3283109Sdd#include <sys/proc.h>
3320775Smpp#include <sys/stack.h>
3420775Smpp
3520775Smpp#include <machine/pcb.h>
3661018Scharnier#include <machine/stack.h>
3720775Smpp
3820775Smpp#include <vm/vm.h>
3920775Smpp#include <vm/vm_param.h>
4020775Smpp#include <vm/pmap.h>
41128314Sbrueffer
4220775Smppstatic void
43stack_capture(struct thread *td, struct stack *st, register_t rbp)
44{
45	struct amd64_frame *frame;
46	vm_offset_t callpc;
47
48	stack_zero(st);
49	frame = (struct amd64_frame *)rbp;
50	while (1) {
51		if (!INKERNEL((long)frame))
52			break;
53		callpc = frame->f_retaddr;
54		if (!INKERNEL(callpc))
55			break;
56		if (stack_put(st, callpc) == -1)
57			break;
58		if (frame->f_frame <= frame ||
59		    (vm_offset_t)frame->f_frame >= td->td_kstack +
60		    td->td_kstack_pages * PAGE_SIZE)
61			break;
62		frame = frame->f_frame;
63	}
64}
65
66void
67stack_save_td(struct stack *st, struct thread *td)
68{
69	register_t rbp;
70
71	if (TD_IS_SWAPPED(td))
72		panic("stack_save_td: swapped");
73	if (TD_IS_RUNNING(td))
74		panic("stack_save_td: running");
75
76	rbp = td->td_pcb->pcb_rbp;
77	stack_capture(td, st, rbp);
78}
79
80void
81stack_save(struct stack *st)
82{
83	register_t rbp;
84
85	__asm __volatile("movq %%rbp,%0" : "=r" (rbp));
86	stack_capture(curthread, st, rbp);
87}
88