1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef _ASMARM_BUG_H
3 #define _ASMARM_BUG_H
4
5 #include <linux/linkage.h>
6 #include <linux/types.h>
7 #include <asm/opcodes.h>
8
9 /*
10 * Use a suitable undefined instruction to use
11 * We need to be careful not to conflict with
12 * the register_undef_hook() system.
13 */
14 #ifdef CONFIG_THUMB2_KERNEL
15 #define BUG_INSTR_VALUE 0xde02
16 #define BUG_INSTR(__value) __inst_thumb16(__va
17 #else
18 #define BUG_INSTR_VALUE 0xe7f001f2
19 #define BUG_INSTR(__value) __inst_arm(__value)
20 #endif
21
22
23 #define BUG() _BUG(__FILE__, __LINE__, BUG_INS
24 #define _BUG(file, line, value) __BUG(file, li
25
26 #ifdef CONFIG_DEBUG_BUGVERBOSE
27
28 /*
29 * The extra indirection is to ensure that the
30 * OK. Many version of gcc do not support the
31 * preferable to this unpleasantness. We use m
32 * avoid multiple copies of the string appeari
33 */
34
35 #define __BUG(__file, __line, __value)
36 do {
37 asm volatile("1:\t" BUG_INSTR(__value)
38 ".pushsection .rodata.str, \"a
39 "2:\t.asciz " #__file "\n"
40 ".popsection\n"
41 ".pushsection __bug_table,\"aw
42 ".align 2\n"
43 "3:\t.word 1b, 2b\n"
44 "\t.hword " #__line ", 0\n"
45 ".popsection");
46 unreachable();
47 } while (0)
48
49 #else
50
51 #define __BUG(__file, __line, __value)
52 do {
53 asm volatile(BUG_INSTR(__value) "\n");
54 unreachable();
55 } while (0)
56 #endif /* CONFIG_DEBUG_BUGVERBOSE */
57
58 #define HAVE_ARCH_BUG
59
60 #include <asm-generic/bug.h>
61
62 struct pt_regs;
63 void die(const char *msg, struct pt_regs *regs
64
65 void arm_notify_die(const char *str, struct pt
66 int signo, int si_code, void _
67 unsigned long err, unsigned lo
68
69 #ifdef CONFIG_ARM_LPAE
70 #define FAULT_CODE_ALIGNMENT 33
71 #define FAULT_CODE_DEBUG 34
72 #else
73 #define FAULT_CODE_ALIGNMENT 1
74 #define FAULT_CODE_DEBUG 2
75 #endif
76
77 void hook_fault_code(int nr, int (*fn)(unsigne
78 struct
79 int sig, int code, const
80
81 void hook_ifault_code(int nr, int (*fn)(unsign
82 struct
83 int sig, int code, const
84
85 extern asmlinkage void c_backtrace(unsigned lo
86 const char
87
88 struct mm_struct;
89 void show_pte(const char *lvl, struct mm_struc
90 extern void __show_regs(struct pt_regs *);
91 extern void __show_regs_alloc_free(struct pt_r
92
93 #endif
94
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