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
41 struct unwind_state {
42 uintptr_t fp;
43 uintptr_t sp;
44 uintptr_t pc;
45 };
46
47 bool 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
60 static __inline bool
kstack_contains(struct thread * td,vm_offset_t va,size_t len)61 kstack_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_ */
70