Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/powerpc/include/asm/bug.h
26481 views
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


8
#ifdef CONFIG_BUG

9


10
#ifdef __ASSEMBLY__

11
#include <asm/asm-offsets.h>

12
#ifdef CONFIG_DEBUG_BUGVERBOSE

13
.macro EMIT_BUG_ENTRY addr,file,line,flags

14
	 .section __bug_table,"aw"

15
5001:	 .4byte \addr - .

16
	 .4byte 5002f - .

17
	 .short \line, \flags

18
	 .org 5001b+BUG_ENTRY_SIZE

19
	 .previous

20
	 .section .rodata,"a"

21
5002:	 .asciz "\file"

22
	 .previous

23
.endm

24
#else

25
.macro EMIT_BUG_ENTRY addr,file,line,flags

26
	 .section __bug_table,"aw"

27
5001:	 .4byte \addr - .

28
	 .short \flags

29
	 .org 5001b+BUG_ENTRY_SIZE

30
	 .previous

31
.endm

32
#endif /* verbose */

33


34
#else /* !__ASSEMBLY__ */

35
/* _EMIT_BUG_ENTRY expects args %0,%1,%2,%3 to be FILE, LINE, flags and

36
   sizeof(struct bug_entry), respectively */

37
#ifdef CONFIG_DEBUG_BUGVERBOSE

38
#define _EMIT_BUG_ENTRY				\

39
	".section __bug_table,\"aw\"\n"		\

40
	"2:	.4byte 1b - .\n"		\

41
	"	.4byte %0 - .\n"		\

42
	"	.short %1, %2\n"		\

43
	".org 2b+%3\n"				\

44
	".previous\n"

45
#else

46
#define _EMIT_BUG_ENTRY				\

47
	".section __bug_table,\"aw\"\n"		\

48
	"2:	.4byte 1b - .\n"		\

49
	"	.short %2\n"			\

50
	".org 2b+%3\n"				\

51
	".previous\n"

52
#endif

53


54
#define BUG_ENTRY(insn, flags, ...)			\

55
	__asm__ __volatile__(				\

56
		"1:	" insn "\n"			\

57
		_EMIT_BUG_ENTRY				\

58
		: : "i" (__FILE__), "i" (__LINE__),	\

59
		  "i" (flags),				\

60
		  "i" (sizeof(struct bug_entry)),	\

61
		  ##__VA_ARGS__)

62


63
/*

64
 * BUG_ON() and WARN_ON() do their best to cooperate with compile-time

65
 * optimisations. However depending on the complexity of the condition

66
 * some compiler versions may not produce optimal results.

67
 */

68


69
#define BUG() do {						\

70
	BUG_ENTRY("twi 31, 0, 0", 0);				\

71
	unreachable();						\

72
} while (0)

73
#define HAVE_ARCH_BUG

74


75
#define __WARN_FLAGS(flags) BUG_ENTRY("twi 31, 0, 0", BUGFLAG_WARNING | (flags))

76


77
#ifdef CONFIG_PPC64

78
#define BUG_ON(x) do {						\

79
	if (__builtin_constant_p(x)) {				\

80
		if (x)						\

81
			BUG();					\

82
	} else {						\

83
		BUG_ENTRY(PPC_TLNEI " %4, 0", 0, "r" ((__force long)(x)));	\

84
	}							\

85
} while (0)

86


87
#define WARN_ON(x) ({						\

88
	int __ret_warn_on = !!(x);				\

89
	if (__builtin_constant_p(__ret_warn_on)) {		\

90
		if (__ret_warn_on)				\

91
			__WARN();				\

92
	} else {						\

93
		BUG_ENTRY(PPC_TLNEI " %4, 0",			\

94
			  BUGFLAG_WARNING | BUGFLAG_TAINT(TAINT_WARN),	\

95
			  "r" (__ret_warn_on));	\

96
	}							\

97
	unlikely(__ret_warn_on);				\

98
})

99


100
#define HAVE_ARCH_BUG_ON

101
#define HAVE_ARCH_WARN_ON

102
#endif

103


104
#endif /* __ASSEMBLY __ */

105
#else

106
#ifdef __ASSEMBLY__

107
.macro EMIT_BUG_ENTRY addr,file,line,flags

108
.endm

109
#else /* !__ASSEMBLY__ */

110
#define _EMIT_BUG_ENTRY

111
#endif

112
#endif /* CONFIG_BUG */

113


114
#define EMIT_WARN_ENTRY EMIT_BUG_ENTRY

115


116
#include <asm-generic/bug.h>

117


118
#ifndef __ASSEMBLY__

119


120
struct pt_regs;

121
void hash__do_page_fault(struct pt_regs *);

122
void bad_page_fault(struct pt_regs *, int);

123
void emulate_single_step(struct pt_regs *regs);

124
extern void _exception(int, struct pt_regs *, int, unsigned long);

125
extern void _exception_pkey(struct pt_regs *, unsigned long, int);

126
extern void die(const char *, struct pt_regs *, long);

127
void die_mce(const char *str, struct pt_regs *regs, long err);

128
extern bool die_will_crash(void);

129
extern void panic_flush_kmsg_start(void);

130
extern void panic_flush_kmsg_end(void);

131
#endif /* !__ASSEMBLY__ */

132


133
#endif /* __KERNEL__ */

134
#endif /* _ASM_POWERPC_BUG_H */

135


136