1/*-
2 * Copyright (c) 2000, 2001 Ben Harris
3 * Copyright (c) 1996 Scott K. Stevens
4 *
5 * Mach Operating System
6 * Copyright (c) 1991,1990 Carnegie Mellon University
7 * All Rights Reserved.
8 *
9 * Permission to use, copy, modify and distribute this software and its
10 * documentation is hereby granted, provided that both the copyright
11 * notice and this permission notice appear in all copies of the
12 * software, derivative works or modified versions, and any portions
13 * thereof, and that both notices appear in supporting documentation.
14 *
15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
17 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
18 *
19 * Carnegie Mellon requests users of this software to return to
20 *
21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
22 * School of Computer Science
23 * Carnegie Mellon University
24 * Pittsburgh PA 15213-3890
25 *
26 * any improvements or extensions that they make and grant Carnegie the
27 * rights to redistribute these changes.
28 */
29
30#ifndef _MACHINE_STACK_H_
31#define _MACHINE_STACK_H_
32
33#define INKERNEL(va) (((vm_offset_t)(va)) >= VM_MIN_KERNEL_ADDRESS)
34
35#define FR_SCP (0)
36#define FR_RLV (-1)
37#define FR_RSP (-2)
38#define FR_RFP (-3)
39
40/* The state of the unwind process */
41struct unwind_state {
42 uint32_t registers[16];
43 uint32_t start_pc;
44 uint32_t *insn;
45 u_int entries;
46 u_int byte;
47 uint16_t update_mask;
48};
49
50/* The register names */
51#define FP 11
52#define SP 13
53#define LR 14
54#define PC 15
55
56#ifdef _KERNEL
57
58int unwind_stack_one(struct unwind_state *, int);
59
60struct linker_file;
61void unwind_module_loaded(struct linker_file *);
62void unwind_module_unloaded(struct linker_file *);
63
64#ifdef _SYS_PROC_H_
65
66#include <machine/pcb.h>
67
68/* Get the current kernel thread stack usage. */
69#define GET_STACK_USAGE(total, used) do { \
70 struct thread *td = curthread; \
71 (total) = td->td_kstack_pages * PAGE_SIZE - sizeof(struct pcb); \
72 (used) = td->td_kstack + (total) - (vm_offset_t)&td; \
73} while (0)
74
75static __inline bool
76kstack_contains(struct thread *td, vm_offset_t va, size_t len)
77{
78 return (va >= td->td_kstack && va + len >= va &&
79 va + len <= td->td_kstack + td->td_kstack_pages * PAGE_SIZE -
80 sizeof(struct pcb));
81}
82#endif /* _SYS_PROC_H_ */
83
84#endif
85
86#endif /* !_MACHINE_STACK_H_ */