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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() \
43do { \
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) \
56do { \
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() \
81do { \
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
114struct pt_regs;
115
116/* arch/sh/kernel/traps.c */
117extern void die(const char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn));
118extern void die_if_kernel(const char *str, struct pt_regs *regs, long err);
119extern void die_if_no_fixup(const char *str, struct pt_regs *regs, long err);
120
121#endif /* __ASM_SH_BUG_H */
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() \
43do { \
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) \
56do { \
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() \
81do { \
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
114struct pt_regs;
115
116/* arch/sh/kernel/traps.c */
117extern void die(const char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn));
118extern void die_if_kernel(const char *str, struct pt_regs *regs, long err);
119extern void die_if_no_fixup(const char *str, struct pt_regs *regs, long err);
120
121#endif /* __ASM_SH_BUG_H */