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1 | /* SPDX-License-Identifier: GPL-2.0 */ |
---|---|
2 | #ifndef __ASM_SH_BUG_H |
3 | #define __ASM_SH_BUG_H |
4 | |
5 | #include <linux/linkage.h> |
6 | |
7 | #define TRAPA_BUG_OPCODE 0xc33e /* trapa #0x3e */ |
8 | #define BUGFLAG_UNWINDER (1 << 1) |
9 | |
10 | #ifdef CONFIG_GENERIC_BUG |
11 | #define HAVE_ARCH_BUG |
12 | #define HAVE_ARCH_WARN_ON |
13 | |
14 | /** |
15 | * _EMIT_BUG_ENTRY |
16 | * %1 - __FILE__ |
17 | * %2 - __LINE__ |
18 | * %3 - trap type |
19 | * %4 - sizeof(struct bug_entry) |
20 | * |
21 | * The trapa opcode itself sits in %0. |
22 | * The %O notation is used to avoid # generation. |
23 | * |
24 | * The offending file and line are encoded in the __bug_table section. |
25 | */ |
26 | #ifdef CONFIG_DEBUG_BUGVERBOSE |
27 | #define _EMIT_BUG_ENTRY \ |
28 | "\t.pushsection __bug_table,\"aw\"\n" \ |
29 | "2:\t.long 1b, %O1\n" \ |
30 | "\t.short %O2, %O3\n" \ |
31 | "\t.org 2b+%O4\n" \ |
32 | "\t.popsection\n" |
33 | #else |
34 | #define _EMIT_BUG_ENTRY \ |
35 | "\t.pushsection __bug_table,\"aw\"\n" \ |
36 | "2:\t.long 1b\n" \ |
37 | "\t.short %O3\n" \ |
38 | "\t.org 2b+%O4\n" \ |
39 | "\t.popsection\n" |
40 | #endif |
41 | |
42 | #define BUG() \ |
43 | do { \ |
44 | __asm__ __volatile__ ( \ |
45 | "1:\t.short %O0\n" \ |
46 | _EMIT_BUG_ENTRY \ |
47 | : \ |
48 | : "n" (TRAPA_BUG_OPCODE), \ |
49 | "i" (__FILE__), \ |
50 | "i" (__LINE__), "i" (0), \ |
51 | "i" (sizeof(struct bug_entry))); \ |
52 | unreachable(); \ |
53 | } while (0) |
54 | |
55 | #define __WARN_FLAGS(flags) \ |
56 | do { \ |
57 | __asm__ __volatile__ ( \ |
58 | "1:\t.short %O0\n" \ |
59 | _EMIT_BUG_ENTRY \ |
60 | : \ |
61 | : "n" (TRAPA_BUG_OPCODE), \ |
62 | "i" (__FILE__), \ |
63 | "i" (__LINE__), \ |
64 | "i" (BUGFLAG_WARNING|(flags)), \ |
65 | "i" (sizeof(struct bug_entry))); \ |
66 | } while (0) |
67 | |
68 | #define WARN_ON(x) ({ \ |
69 | int __ret_warn_on = !!(x); \ |
70 | if (__builtin_constant_p(__ret_warn_on)) { \ |
71 | if (__ret_warn_on) \ |
72 | __WARN(); \ |
73 | } else { \ |
74 | if (unlikely(__ret_warn_on)) \ |
75 | __WARN(); \ |
76 | } \ |
77 | unlikely(__ret_warn_on); \ |
78 | }) |
79 | |
80 | #define UNWINDER_BUG() \ |
81 | do { \ |
82 | __asm__ __volatile__ ( \ |
83 | "1:\t.short %O0\n" \ |
84 | _EMIT_BUG_ENTRY \ |
85 | : \ |
86 | : "n" (TRAPA_BUG_OPCODE), \ |
87 | "i" (__FILE__), \ |
88 | "i" (__LINE__), \ |
89 | "i" (BUGFLAG_UNWINDER), \ |
90 | "i" (sizeof(struct bug_entry))); \ |
91 | } while (0) |
92 | |
93 | #define UNWINDER_BUG_ON(x) ({ \ |
94 | int __ret_unwinder_on = !!(x); \ |
95 | if (__builtin_constant_p(__ret_unwinder_on)) { \ |
96 | if (__ret_unwinder_on) \ |
97 | UNWINDER_BUG(); \ |
98 | } else { \ |
99 | if (unlikely(__ret_unwinder_on)) \ |
100 | UNWINDER_BUG(); \ |
101 | } \ |
102 | unlikely(__ret_unwinder_on); \ |
103 | }) |
104 | |
105 | #else |
106 | |
107 | #define UNWINDER_BUG BUG |
108 | #define UNWINDER_BUG_ON BUG_ON |
109 | |
110 | #endif /* CONFIG_GENERIC_BUG */ |
111 | |
112 | #include <asm-generic/bug.h> |
113 | |
114 | struct pt_regs; |
115 | |
116 | /* arch/sh/kernel/traps.c */ |
117 | extern void die(const char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn)); |
118 | extern void die_if_kernel(const char *str, struct pt_regs *regs, long err); |
119 | extern void die_if_no_fixup(const char *str, struct pt_regs *regs, long err); |
120 | |
121 | #endif /* __ASM_SH_BUG_H */ |
122 |
Warning: This file is not a C or C++ file. It does not have highlighting.