include/asm-sh/bug.h

   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_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 struct pt_regs;
  76
  77 /* arch/sh/kernel/traps.c */
  78 void handle_BUG(struct pt_regs *);
  79
  80 #endif /* CONFIG_BUG */
  81
  82 #include <asm-generic/bug.h>
  83
  84 #endif /* __ASM_SH_BUG_H */