| 1 |
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| 2 | #ifndef __ASM_SH_BUG_H
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| 3 | #define __ASM_SH_BUG_H
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| 4 |
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| 5 | #include <linux/linkage.h>
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| 6 |
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| 7 | #define TRAPA_BUG_OPCODE 0xc33e
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| 8 | #define BUGFLAG_UNWINDER (1 << 1)
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| 9 |
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| 10 | #ifdef CONFIG_GENERIC_BUG
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| 11 | #define HAVE_ARCH_BUG
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| 12 | #define HAVE_ARCH_WARN_ON
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| 13 |
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| 14 | |
| 15 | * _EMIT_BUG_ENTRY
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| 16 | * %1 - __FILE__
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| 17 | * %2 - __LINE__
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| 18 | * %3 - trap type
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| 19 | * %4 - sizeof(struct bug_entry)
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| 20 | *
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| 21 | * The trapa opcode itself sits in %0.
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| 22 | * The %O notation is used to avoid # generation.
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| 23 | *
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| 24 | * The offending file and line are encoded in the __bug_table section.
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| 25 |
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| 26 | #ifdef CONFIG_DEBUG_BUGVERBOSE
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| 27 | #define _EMIT_BUG_ENTRY \
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| 28 | "\t.pushsection __bug_table,\"aw\"\n" \
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| 29 | "2:\t.long 1b, %O1\n" \
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| 30 | "\t.short %O2, %O3\n" \
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| 31 | "\t.org 2b+%O4\n" \
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| 32 | "\t.popsection\n"
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| 33 | #else
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| 34 | #define _EMIT_BUG_ENTRY \
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| 35 | "\t.pushsection __bug_table,\"aw\"\n" \
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| 36 | "2:\t.long 1b\n" \
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| 37 | "\t.short %O3\n" \
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| 38 | "\t.org 2b+%O4\n" \
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| 39 | "\t.popsection\n"
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| 40 | #endif
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| 41 |
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| 42 | #define BUG() \
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| 43 | do { \
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| 44 | __asm__ __volatile__ ( \
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| 45 | "1:\t.short %O0\n" \
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| 46 | _EMIT_BUG_ENTRY \
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| 47 | : \
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| 48 | : "n" (TRAPA_BUG_OPCODE), \
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| 49 | "i" (__FILE__), \
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| 50 | "i" (__LINE__), "i" (0), \
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| 51 | "i" (sizeof(struct bug_entry))); \
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| 52 | unreachable(); \
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| 53 | } while (0)
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| 54 |
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| 55 | #define __WARN_FLAGS(cond_str, flags) \
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| 56 | do { \
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| 57 | __asm__ __volatile__ ( \
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| 58 | "1:\t.short %O0\n" \
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| 59 | _EMIT_BUG_ENTRY \
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| 60 | : \
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| 61 | : "n" (TRAPA_BUG_OPCODE), \
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| 62 | "i" (WARN_CONDITION_STR(cond_str) __FILE__), \
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| 63 | "i" (__LINE__), \
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| 64 | "i" (BUGFLAG_WARNING|(flags)), \
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| 65 | "i" (sizeof(struct bug_entry))); \
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| 66 | } while (0)
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| 67 |
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| 68 | #define WARN_ON(x) ({ \
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| 69 | int __ret_warn_on = !!(x); \
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| 70 | if (__builtin_constant_p(__ret_warn_on)) { \
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| 71 | if (__ret_warn_on) \
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| 72 | __WARN(); \
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| 73 | } else { \
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| 74 | if (unlikely(__ret_warn_on)) \
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| 75 | __WARN(); \
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| 76 | } \
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| 77 | unlikely(__ret_warn_on); \
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| 78 | })
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| 79 |
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| 80 | #define UNWINDER_BUG() \
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| 81 | do { \
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| 82 | __asm__ __volatile__ ( \
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| 83 | "1:\t.short %O0\n" \
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| 84 | _EMIT_BUG_ENTRY \
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| 85 | : \
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| 86 | : "n" (TRAPA_BUG_OPCODE), \
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| 87 | "i" (__FILE__), \
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| 88 | "i" (__LINE__), \
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| 89 | "i" (BUGFLAG_UNWINDER), \
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| 90 | "i" (sizeof(struct bug_entry))); \
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| 91 | } while (0)
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| 92 |
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| 93 | #define UNWINDER_BUG_ON(x) ({ \
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| 94 | int __ret_unwinder_on = !!(x); \
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| 95 | if (__builtin_constant_p(__ret_unwinder_on)) { \
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| 96 | if (__ret_unwinder_on) \
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| 97 | UNWINDER_BUG(); \
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| 98 | } else { \
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| 99 | if (unlikely(__ret_unwinder_on)) \
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| 100 | UNWINDER_BUG(); \
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| 101 | } \
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| 102 | unlikely(__ret_unwinder_on); \
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| 103 | })
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| 104 |
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| 105 | #else
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| 106 |
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| 107 | #define UNWINDER_BUG BUG
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| 108 | #define UNWINDER_BUG_ON BUG_ON
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| 109 |
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| 110 | #endif
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| 111 |
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| 112 | #include <asm-generic/bug.h>
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| 113 |
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| 114 | struct pt_regs;
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| 115 |
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| 116 |
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| 117 | extern void die(const char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn));
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| 118 | extern void die_if_kernel(const char *str, struct pt_regs *regs, long err);
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| 119 | extern void die_if_no_fixup(const char *str, struct pt_regs *regs, long err);
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| 120 |
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| 121 | #endif
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