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 */
14 enum 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
20 struct unwind_idx {
21 unsigned long addr_offset;
22 unsigned long insn;
23 };
24
25 struct unwind_table {
26 struct list_head list;
27 struct list_head mod_list;
28 const struct unwind_idx *start;
29 const struct unwind_idx *origin;
30 const struct unwind_idx *stop;
31 unsigned long begin_addr;
32 unsigned long end_addr;
33 };
34
35 extern struct unwind_table *unwind_table_add(unsigned long start,
36 unsigned long size,
37 unsigned long text_addr,
38 unsigned long text_size);
39 extern void unwind_table_del(struct unwind_table *tab);
40 extern void unwind_backtrace(struct pt_regs *regs, struct task_struct *tsk,
41 const char *loglvl);
42
43 void __aeabi_unwind_cpp_pr0(void);
44 void __aeabi_unwind_cpp_pr1(void);
45 void __aeabi_unwind_cpp_pr2(void);
46
47 #endif /* !__ASSEMBLY__ */
48
49 #ifdef CONFIG_ARM_UNWIND
50 #define UNWIND(code...) code
51 #else
52 #define UNWIND(code...)
53 #endif
54
55 #endif /* __ASM_UNWIND_H */
56
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