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Catalin Marinasbff595c2009-02-16 11:41:36 +01001/*
2 * arch/arm/include/asm/unwind.h
3 *
4 * Copyright (C) 2008 ARM Limited
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18 */
19
20#ifndef __ASM_UNWIND_H
21#define __ASM_UNWIND_H
22
23#ifndef __ASSEMBLY__
24
25/* Unwind reason code according the the ARM EABI documents */
26enum unwind_reason_code {
27 URC_OK = 0, /* operation completed successfully */
28 URC_CONTINUE_UNWIND = 8,
29 URC_FAILURE = 9 /* unspecified failure of some kind */
30};
31
32struct unwind_idx {
33 unsigned long addr;
34 unsigned long insn;
35};
36
37struct unwind_table {
38 struct list_head list;
39 struct unwind_idx *start;
40 struct unwind_idx *stop;
41 unsigned long begin_addr;
42 unsigned long end_addr;
43};
44
45extern struct unwind_table *unwind_table_add(unsigned long start,
46 unsigned long size,
47 unsigned long text_addr,
48 unsigned long text_size);
49extern void unwind_table_del(struct unwind_table *tab);
50extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk);
51
52#ifdef CONFIG_ARM_UNWIND
53extern int __init unwind_init(void);
54#else
55static inline int __init unwind_init(void)
56{
57 return 0;
58}
59#endif
60
61#endif /* !__ASSEMBLY__ */
62
63#ifdef CONFIG_ARM_UNWIND
64#define UNWIND(code...) code
65#else
66#define UNWIND(code...)
67#endif
68
69#endif /* __ASM_UNWIND_H */