1/*-
 2 * Copyright (c) 2016 Ruslan Bukin <br@bsdpad.com>
 3 * All rights reserved.
 4 *
 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.
 8 *
 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).
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
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.
21 *
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
32 * SUCH DAMAGE.
33 */
34
35#ifndef _MACHINE_STACK_H_
36#define	_MACHINE_STACK_H_
37
38#define	INKERNEL(va)	((va) >= VM_MIN_KERNEL_ADDRESS && \
39			 (va) <= VM_MAX_KERNEL_ADDRESS)
40
41struct unwind_state {
42	uintptr_t fp;
43	uintptr_t sp;
44	uintptr_t pc;
45};
46
47bool unwind_frame(struct thread *, struct unwind_state *);
48
49#ifdef _SYS_PROC_H_
50
51#include <machine/pcb.h>
52
53/* Get the current kernel thread stack usage. */
54#define	GET_STACK_USAGE(total, used) do {				\
55	struct thread *td = curthread;					\
56	(total) = td->td_kstack_pages * PAGE_SIZE - sizeof(struct pcb);	\
57	(used) = td->td_kstack + (total) - (vm_offset_t)&td;		\
58} while (0)
59
60static __inline bool
61kstack_contains(struct thread *td, vm_offset_t va, size_t len)
62{
63	return (va >= td->td_kstack && va + len >= va &&
64	    va + len <= td->td_kstack + td->td_kstack_pages * PAGE_SIZE -
65	    sizeof(struct pcb));
66}
67#endif	/* _SYS_PROC_H_ */
68
69#endif /* !_MACHINE_STACK_H_ */