2 * Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
5 * Portions of this software were developed by SRI International and the
6 * University of Cambridge Computer Laboratory under DARPA/AFRL contract
7 * FA8750-10-C-0237 ("CTSRD"), as part of the DARPA CRASH research programme.
9 * Portions of this software were developed by the University of Cambridge
10 * Computer Laboratory as part of the CTSRD Project, with support from the
11 * UK Higher Education Innovation Fund (HEIF).
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 #include <sys/cdefs.h>
36 __FBSDID("$FreeBSD$");
38 #include <sys/param.h>
39 #include <sys/systm.h>
41 #include <sys/mutex.h>
43 #include <sys/stack.h>
45 #include <machine/vmparam.h>
46 #include <machine/pcb.h>
47 #include <machine/stack.h>
50 stack_capture(struct thread *td, struct stack *st, struct unwind_state *frame)
56 if (!unwind_frame(td, frame))
58 if (!INKERNEL((vm_offset_t)frame->pc))
60 if (stack_put(st, frame->pc) == -1)
66 stack_save_td(struct stack *st, struct thread *td)
68 struct unwind_state frame;
70 THREAD_LOCK_ASSERT(td, MA_OWNED);
71 KASSERT(!TD_IS_SWAPPED(td),
72 ("stack_save_td: thread %p is swapped", td));
74 if (TD_IS_RUNNING(td))
77 frame.sp = td->td_pcb->pcb_sp;
78 frame.fp = td->td_pcb->pcb_s[0];
79 frame.pc = td->td_pcb->pcb_ra;
81 stack_capture(td, st, &frame);
86 stack_save(struct stack *st)
88 struct unwind_state frame;
91 __asm __volatile("mv %0, sp" : "=&r" (sp));
94 frame.fp = (uintptr_t)__builtin_frame_address(0);
95 frame.pc = (uintptr_t)stack_save;
97 stack_capture(curthread, st, &frame);