| 1 |
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| 2 | #ifndef _ASM_POWERPC_BUG_H
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| 3 | #define _ASM_POWERPC_BUG_H
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| 4 | #ifdef __KERNEL__
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| 5 |
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| 6 | #include <asm/asm-compat.h>
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| 7 |
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| 8 | #ifdef CONFIG_BUG
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| 9 |
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| 10 | #ifdef __ASSEMBLER__
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| 11 | #include <asm/asm-offsets.h>
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| 12 | #ifdef CONFIG_DEBUG_BUGVERBOSE
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| 13 | .macro EMIT_BUG_ENTRY addr,file,line,flags
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| 14 | .section __bug_table,"aw"
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| 15 | 5001: .4byte \addr - .
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| 16 | .4byte 5002f - .
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| 17 | .short \line, \flags
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| 18 | .org 5001b+BUG_ENTRY_SIZE
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| 19 | .previous
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| 20 | .section .rodata,"a"
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| 21 | 5002: .asciz "\file"
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| 22 | .previous
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| 23 | .endm
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| 24 | #else
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| 25 | .macro EMIT_BUG_ENTRY addr,file,line,flags
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| 26 | .section __bug_table,"aw"
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| 27 | 5001: .4byte \addr - .
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| 28 | .short \flags
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| 29 | .org 5001b+BUG_ENTRY_SIZE
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| 30 | .previous
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| 31 | .endm
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| 32 | #endif
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| 33 |
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| 34 | #else
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| 35 | |
| 36 | sizeof(struct bug_entry), respectively
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| 37 | #ifdef CONFIG_DEBUG_BUGVERBOSE
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| 38 | #define _EMIT_BUG_ENTRY \
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| 39 | ".section __bug_table,\"aw\"\n" \
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| 40 | "2: .4byte 1b - .\n" \
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| 41 | " .4byte %0 - .\n" \
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| 42 | " .short %1, %2\n" \
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| 43 | ".org 2b+%3\n" \
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| 44 | ".previous\n"
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| 45 | #else
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| 46 | #define _EMIT_BUG_ENTRY \
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| 47 | ".section __bug_table,\"aw\"\n" \
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| 48 | "2: .4byte 1b - .\n" \
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| 49 | " .short %2\n" \
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| 50 | ".org 2b+%3\n" \
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| 51 | ".previous\n"
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| 52 | #endif
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| 53 |
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| 54 | #define BUG_ENTRY(cond_str, insn, flags, ...) \
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| 55 | __asm__ __volatile__( \
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| 56 | "1: " insn "\n" \
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| 57 | _EMIT_BUG_ENTRY \
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| 58 | : : "i" (WARN_CONDITION_STR(cond_str) __FILE__), "i" (__LINE__), \
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| 59 | "i" (flags), \
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| 60 | "i" (sizeof(struct bug_entry)), \
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| 61 | ##__VA_ARGS__)
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| 62 |
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| 63 | |
| 64 | * BUG_ON() and WARN_ON() do their best to cooperate with compile-time
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| 65 | * optimisations. However depending on the complexity of the condition
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| 66 | * some compiler versions may not produce optimal results.
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| 67 |
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| 68 |
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| 69 | #define BUG() do { \
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| 70 | BUG_ENTRY("", "twi 31, 0, 0", 0); \
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| 71 | unreachable(); \
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| 72 | } while (0)
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| 73 | #define HAVE_ARCH_BUG
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| 74 |
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| 75 | #define __WARN_FLAGS(cond_str, flags) BUG_ENTRY(cond_str, "twi 31, 0, 0", BUGFLAG_WARNING | (flags))
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| 76 |
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| 77 | #ifdef CONFIG_PPC64
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| 78 | #define BUG_ON(x) do { \
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| 79 | if (__builtin_constant_p(x)) { \
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| 80 | if (x) \
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| 81 | BUG(); \
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| 82 | } else { \
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| 83 | BUG_ENTRY(#x, PPC_TLNEI " %4, 0", 0, "r" ((__force long)(x))); \
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| 84 | } \
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| 85 | } while (0)
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| 86 |
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| 87 | #define WARN_ON(x) ({ \
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| 88 | int __ret_warn_on = !!(x); \
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| 89 | if (__builtin_constant_p(__ret_warn_on)) { \
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| 90 | if (__ret_warn_on) \
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| 91 | __WARN(); \
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| 92 | } else { \
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| 93 | BUG_ENTRY(#x, PPC_TLNEI " %4, 0", \
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| 94 | BUGFLAG_WARNING | BUGFLAG_TAINT(TAINT_WARN), \
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| 95 | "r" (__ret_warn_on)); \
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| 96 | } \
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| 97 | unlikely(__ret_warn_on); \
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| 98 | })
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| 99 |
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| 100 | #define HAVE_ARCH_BUG_ON
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| 101 | #define HAVE_ARCH_WARN_ON
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| 102 | #endif
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| 103 |
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| 104 | #endif
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| 105 | #else
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| 106 | #ifdef __ASSEMBLER__
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| 107 | .macro EMIT_BUG_ENTRY addr,file,line,flags
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| 108 | .endm
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| 109 | #else
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| 110 | #define _EMIT_BUG_ENTRY
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| 111 | #endif
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| 112 | #endif
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| 113 |
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| 114 | #define EMIT_WARN_ENTRY EMIT_BUG_ENTRY
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| 115 |
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| 116 | #include <asm-generic/bug.h>
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| 117 |
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| 118 | #ifndef __ASSEMBLER__
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| 119 |
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| 120 | struct pt_regs;
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| 121 | void hash__do_page_fault(struct pt_regs *);
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| 122 | void bad_page_fault(struct pt_regs *, int);
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| 123 | void emulate_single_step(struct pt_regs *regs);
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| 124 | extern void _exception(int, struct pt_regs *, int, unsigned long);
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| 125 | extern void _exception_pkey(struct pt_regs *, unsigned long, int);
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| 126 | extern void die(const char *, struct pt_regs *, long);
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| 127 | void die_mce(const char *str, struct pt_regs *regs, long err);
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| 128 | extern bool die_will_crash(void);
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| 129 | extern void panic_flush_kmsg_start(void);
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| 130 | extern void panic_flush_kmsg_end(void);
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| 131 | #endif
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| 132 |
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| 133 | #endif
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| 134 | #endif
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