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unwind.h
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1 /*
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 */
27  URC_OK = 0, /* operation completed successfully */
29  URC_FAILURE = 9 /* unspecified failure of some kind */
30 };
31 
32 struct unwind_idx {
33  unsigned long addr_offset;
34  unsigned long insn;
35 };
36 
37 struct unwind_table {
38  struct list_head list;
39  const struct unwind_idx *start;
40  const struct unwind_idx *origin;
41  const struct unwind_idx *stop;
42  unsigned long begin_addr;
43  unsigned long end_addr;
44 };
45 
46 extern struct unwind_table *unwind_table_add(unsigned long start,
47  unsigned long size,
48  unsigned long text_addr,
49  unsigned long text_size);
50 extern void unwind_table_del(struct unwind_table *tab);
51 extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk);
52 
53 #endif /* !__ASSEMBLY__ */
54 
55 #ifdef CONFIG_ARM_UNWIND
56 #define UNWIND(code...) code
57 #else
58 #define UNWIND(code...)
59 #endif
60 
61 #endif /* __ASM_UNWIND_H */