1/*-
2 * Mach Operating System
3 * Copyright (c) 1992 Carnegie Mellon University
4 * All Rights Reserved.
5 *
6 * Permission to use, copy, modify and distribute this software and its
7 * documentation is hereby granted, provided that both the copyright
8 * notice and this permission notice appear in all copies of the
9 * software, derivative works or modified versions, and any portions
10 * thereof, and that both notices appear in supporting documentation.
11 *
12 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
13 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
14 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
15 *
16 * Carnegie Mellon requests users of this software to return to
17 *
18 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
19 * School of Computer Science
20 * Carnegie Mellon University
21 * Pittsburgh PA 15213-3890
22 *
23 * any improvements or extensions that they make and grant Carnegie Mellon
24 * the rights to redistribute these changes.
25 */
26
27#ifndef _MACHINE_STACK_H_
28#define _MACHINE_STACK_H_
29
30extern int trapexit[];
31extern int asttrapexit[];
32extern int end[];
33
34#ifdef _SYS_PROC_H_
35
36#include <machine/pcb.h>
37
38/* Get the current kernel thread stack usage. */
39#define GET_STACK_USAGE(total, used) do { \
40 struct thread *td = curthread; \
41 (total) = td->td_kstack_pages * PAGE_SIZE - sizeof(struct pcb); \
42 (used) = td->td_kstack + (total) - (vm_offset_t)&td; \
43} while (0)
44
45static __inline bool
46kstack_contains(struct thread *td, vm_offset_t va, size_t len)
47{
48 return (va >= td->td_kstack && va + len >= va &&
49 va + len <= td->td_kstack + td->td_kstack_pages * PAGE_SIZE -
50 sizeof(struct pcb));
51}
52#endif /* _SYS_PROC_H_ */
53
54#endif /* !_MACHINE_STACK_H_ */