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C/C++ Source or Header  |  2008-12-24  |  1.7 KB  |  80 lines
  1. #ifndef __ASM_SH_BUG_H
  2. #define __ASM_SH_BUG_H
  3.  
  4. #define TRAPA_BUG_OPCODE    0xc33e    /* trapa #0x3e */
  5.  
  6. #ifdef CONFIG_GENERIC_BUG
  7. #define HAVE_ARCH_BUG
  8. #define HAVE_ARCH_WARN_ON
  9.  
  10. /**
  11.  * _EMIT_BUG_ENTRY
  12.  * %1 - __FILE__
  13.  * %2 - __LINE__
  14.  * %3 - trap type
  15.  * %4 - sizeof(struct bug_entry)
  16.  *
  17.  * The trapa opcode itself sits in %0.
  18.  * The %O notation is used to avoid # generation.
  19.  *
  20.  * The offending file and line are encoded in the __bug_table section.
  21.  */
  22. #ifdef CONFIG_DEBUG_BUGVERBOSE
  23. #define _EMIT_BUG_ENTRY                \
  24.     "\t.pushsection __bug_table,\"a\"\n"    \
  25.     "2:\t.long 1b, %O1\n"            \
  26.     "\t.short %O2, %O3\n"            \
  27.     "\t.org 2b+%O4\n"            \
  28.     "\t.popsection\n"
  29. #else
  30. #define _EMIT_BUG_ENTRY                \
  31.     "\t.pushsection __bug_table,\"a\"\n"    \
  32.     "2:\t.long 1b\n"            \
  33.     "\t.short %O3\n"            \
  34.     "\t.org 2b+%O4\n"            \
  35.     "\t.popsection\n"
  36. #endif
  37.  
  38. #define BUG()                        \
  39. do {                            \
  40.     __asm__ __volatile__ (                \
  41.         "1:\t.short %O0\n"            \
  42.         _EMIT_BUG_ENTRY                \
  43.          :                    \
  44.          : "n" (TRAPA_BUG_OPCODE),        \
  45.            "i" (__FILE__),            \
  46.            "i" (__LINE__), "i" (0),        \
  47.            "i" (sizeof(struct bug_entry)));    \
  48. } while (0)
  49.  
  50. #define __WARN()                    \
  51. do {                            \
  52.     __asm__ __volatile__ (                \
  53.         "1:\t.short %O0\n"            \
  54.          _EMIT_BUG_ENTRY            \
  55.          :                    \
  56.          : "n" (TRAPA_BUG_OPCODE),        \
  57.            "i" (__FILE__),            \
  58.            "i" (__LINE__),            \
  59.            "i" (BUGFLAG_WARNING),        \
  60.            "i" (sizeof(struct bug_entry)));    \
  61. } while (0)
  62.  
  63. #define WARN_ON(x) ({                        \
  64.     int __ret_warn_on = !!(x);                \
  65.     if (__builtin_constant_p(__ret_warn_on)) {        \
  66.         if (__ret_warn_on)                \
  67.             __WARN();                \
  68.     } else {                        \
  69.         if (unlikely(__ret_warn_on))            \
  70.             __WARN();                \
  71.     }                            \
  72.     unlikely(__ret_warn_on);                \
  73. })
  74.  
  75. #endif /* CONFIG_GENERIC_BUG */
  76.  
  77. #include <asm-generic/bug.h>
  78.  
  79. #endif /* __ASM_SH_BUG_H */
  80.