2 * Copyright (c) 2015 The FreeBSD Foundation
4 * This software was developed by Andrew Turner under
5 * sponsorship from the FreeBSD Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/param.h>
34 #include <sys/systm.h>
36 #include <sys/mutex.h>
38 #include <sys/stack.h>
40 #include <machine/vmparam.h>
41 #include <machine/pcb.h>
42 #include <machine/stack.h>
45 stack_capture(struct thread *td, struct stack *st, struct unwind_state *frame)
50 if (!unwind_frame(td, frame))
52 if (!INKERNEL((vm_offset_t)frame->pc))
54 if (stack_put(st, frame->pc) == -1)
60 stack_save_td(struct stack *st, struct thread *td)
62 struct unwind_state frame;
64 THREAD_LOCK_ASSERT(td, MA_OWNED);
65 KASSERT(!TD_IS_SWAPPED(td),
66 ("stack_save_td: thread %p is swapped", td));
68 if (TD_IS_RUNNING(td))
71 frame.sp = td->td_pcb->pcb_sp;
72 frame.fp = td->td_pcb->pcb_x[29];
73 frame.pc = td->td_pcb->pcb_lr;
75 stack_capture(td, st, &frame);
80 stack_save(struct stack *st)
82 struct unwind_state frame;
85 __asm __volatile("mov %0, sp" : "=&r" (sp));
88 frame.fp = (uintptr_t)__builtin_frame_address(0);
89 frame.pc = (uintptr_t)stack_save;
91 stack_capture(curthread, st, &frame);