1 /* SPDX-License-Identifier: GPL-2.0 */ 1
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 /* tra
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 # generati
23 *
24 * The offending file and line are encoded in
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_entr
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_entr
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_entr
91 } while (0)
92
93 #define UNWINDER_BUG_ON(x) ({
94 int __ret_unwinder_on = !!(x);
95 if (__builtin_constant_p(__ret_unwinde
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_reg
118 extern void die_if_kernel(const char *str, str
119 extern void die_if_no_fixup(const char *str, s
120
121 #endif /* __ASM_SH_BUG_H */
122
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.