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