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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * arch/arm/include/asm/unwind.h
4 *
5 * Copyright (C) 2008 ARM Limited
6 */
7
8#ifndef __ASM_UNWIND_H
9#define __ASM_UNWIND_H
10
11#ifndef __ASSEMBLY__
12
13/* Unwind reason code according the the ARM EABI documents */
14enum unwind_reason_code {
15 URC_OK = 0, /* operation completed successfully */
16 URC_CONTINUE_UNWIND = 8,
17 URC_FAILURE = 9 /* unspecified failure of some kind */
18};
19
20struct unwind_idx {
21 unsigned long addr_offset;
22 unsigned long insn;
23};
24
25struct unwind_table {
26 struct list_head list;
27 const struct unwind_idx *start;
28 const struct unwind_idx *origin;
29 const struct unwind_idx *stop;
30 unsigned long begin_addr;
31 unsigned long end_addr;
32};
33
34extern struct unwind_table *unwind_table_add(unsigned long start,
35 unsigned long size,
36 unsigned long text_addr,
37 unsigned long text_size);
38extern void unwind_table_del(struct unwind_table *tab);
39extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk);
40
41#endif /* !__ASSEMBLY__ */
42
43#ifdef CONFIG_ARM_UNWIND
44#define UNWIND(code...) code
45#else
46#define UNWIND(code...)
47#endif
48
49#endif /* __ASM_UNWIND_H */