Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _ASM_POWERPC_BUG_H
3#define _ASM_POWERPC_BUG_H
4#ifdef __KERNEL__
5
6#include <asm/asm-compat.h>
7#include <asm/extable.h>
8
9#ifdef CONFIG_BUG
10
11#ifdef __ASSEMBLY__
12#include <asm/asm-offsets.h>
13#ifdef CONFIG_DEBUG_BUGVERBOSE
14.macro EMIT_BUG_ENTRY addr,file,line,flags
15 .section __bug_table,"aw"
165001: .4byte \addr - 5001b, 5002f - 5001b
17 .short \line, \flags
18 .org 5001b+BUG_ENTRY_SIZE
19 .previous
20 .section .rodata,"a"
215002: .asciz "\file"
22 .previous
23.endm
24#else
25.macro EMIT_BUG_ENTRY addr,file,line,flags
26 .section __bug_table,"aw"
275001: .4byte \addr - 5001b
28 .short \flags
29 .org 5001b+BUG_ENTRY_SIZE
30 .previous
31.endm
32#endif /* verbose */
33
34.macro EMIT_WARN_ENTRY addr,file,line,flags
35 EX_TABLE(\addr,\addr+4)
36 EMIT_BUG_ENTRY \addr,\file,\line,\flags
37.endm
38
39#else /* !__ASSEMBLY__ */
40/* _EMIT_BUG_ENTRY expects args %0,%1,%2,%3 to be FILE, LINE, flags and
41 sizeof(struct bug_entry), respectively */
42#ifdef CONFIG_DEBUG_BUGVERBOSE
43#define _EMIT_BUG_ENTRY \
44 ".section __bug_table,\"aw\"\n" \
45 "2:\t.4byte 1b - 2b, %0 - 2b\n" \
46 "\t.short %1, %2\n" \
47 ".org 2b+%3\n" \
48 ".previous\n"
49#else
50#define _EMIT_BUG_ENTRY \
51 ".section __bug_table,\"aw\"\n" \
52 "2:\t.4byte 1b - 2b\n" \
53 "\t.short %2\n" \
54 ".org 2b+%3\n" \
55 ".previous\n"
56#endif
57
58#define BUG_ENTRY(insn, flags, ...) \
59 __asm__ __volatile__( \
60 "1: " insn "\n" \
61 _EMIT_BUG_ENTRY \
62 : : "i" (__FILE__), "i" (__LINE__), \
63 "i" (flags), \
64 "i" (sizeof(struct bug_entry)), \
65 ##__VA_ARGS__)
66
67#define WARN_ENTRY(insn, flags, label, ...) \
68 asm_volatile_goto( \
69 "1: " insn "\n" \
70 EX_TABLE(1b, %l[label]) \
71 _EMIT_BUG_ENTRY \
72 : : "i" (__FILE__), "i" (__LINE__), \
73 "i" (flags), \
74 "i" (sizeof(struct bug_entry)), \
75 ##__VA_ARGS__ : : label)
76
77/*
78 * BUG_ON() and WARN_ON() do their best to cooperate with compile-time
79 * optimisations. However depending on the complexity of the condition
80 * some compiler versions may not produce optimal results.
81 */
82
83#define BUG() do { \
84 BUG_ENTRY("twi 31, 0, 0", 0); \
85 unreachable(); \
86} while (0)
87#define HAVE_ARCH_BUG
88
89#define __WARN_FLAGS(flags) do { \
90 __label__ __label_warn_on; \
91 \
92 WARN_ENTRY("twi 31, 0, 0", BUGFLAG_WARNING | (flags), __label_warn_on); \
93 unreachable(); \
94 \
95__label_warn_on: \
96 break; \
97} while (0)
98
99#ifdef CONFIG_PPC64
100#define BUG_ON(x) do { \
101 if (__builtin_constant_p(x)) { \
102 if (x) \
103 BUG(); \
104 } else { \
105 BUG_ENTRY(PPC_TLNEI " %4, 0", 0, "r" ((__force long)(x))); \
106 } \
107} while (0)
108
109#define WARN_ON(x) ({ \
110 bool __ret_warn_on = false; \
111 do { \
112 if (__builtin_constant_p((x))) { \
113 if (!(x)) \
114 break; \
115 __WARN(); \
116 __ret_warn_on = true; \
117 } else { \
118 __label__ __label_warn_on; \
119 \
120 WARN_ENTRY(PPC_TLNEI " %4, 0", \
121 BUGFLAG_WARNING | BUGFLAG_TAINT(TAINT_WARN), \
122 __label_warn_on, \
123 "r" ((__force long)(x))); \
124 break; \
125__label_warn_on: \
126 __ret_warn_on = true; \
127 } \
128 } while (0); \
129 unlikely(__ret_warn_on); \
130})
131
132#define HAVE_ARCH_BUG_ON
133#define HAVE_ARCH_WARN_ON
134#endif
135
136#endif /* __ASSEMBLY __ */
137#else
138#ifdef __ASSEMBLY__
139.macro EMIT_BUG_ENTRY addr,file,line,flags
140.endm
141.macro EMIT_WARN_ENTRY addr,file,line,flags
142.endm
143#else /* !__ASSEMBLY__ */
144#define _EMIT_BUG_ENTRY
145#define _EMIT_WARN_ENTRY
146#endif
147#endif /* CONFIG_BUG */
148
149#include <asm-generic/bug.h>
150
151#ifndef __ASSEMBLY__
152
153struct pt_regs;
154void hash__do_page_fault(struct pt_regs *);
155void bad_page_fault(struct pt_regs *, int);
156extern void _exception(int, struct pt_regs *, int, unsigned long);
157extern void _exception_pkey(struct pt_regs *, unsigned long, int);
158extern void die(const char *, struct pt_regs *, long);
159void die_mce(const char *str, struct pt_regs *regs, long err);
160extern bool die_will_crash(void);
161extern void panic_flush_kmsg_start(void);
162extern void panic_flush_kmsg_end(void);
163#endif /* !__ASSEMBLY__ */
164
165#endif /* __KERNEL__ */
166#endif /* _ASM_POWERPC_BUG_H */