arch/parisc/include/asm/bug.h

   1 #ifndef _PARISC_BUG_H
   2 #define _PARISC_BUG_H
   3
   4 /*
   5  * Tell the user there is some problem.
   6  * The offending file and line are encoded in the __bug_table section.
   7  */
   8
   9 #ifdef CONFIG_BUG
  10 #define HAVE_ARCH_BUG
  11 #define HAVE_ARCH_WARN_ON
  12
  13 /* the break instruction is used as BUG() marker.  */
  14 #define PARISC_BUG_BREAK_ASM    "break 0x1f, 0x1fff"
  15 #define PARISC_BUG_BREAK_INSN   0x03ffe01f  /* PARISC_BUG_BREAK_ASM */
  16
  17 #if defined(CONFIG_64BIT)
  18 #define ASM_WORD_INSN           ".dword\t"
  19 #else
  20 #define ASM_WORD_INSN           ".word\t"
  21 #endif
  22
  23 #ifdef CONFIG_DEBUG_BUGVERBOSE
  24 #define BUG()                                                           \
  25         do {                                                            \
  26                 asm volatile("\n"                                       \
  27                              "1:\t" PARISC_BUG_BREAK_ASM "\n"           \
  28                              "\t.pushsection __bug_table,\"a\"\n"       \
  29                              "2:\t" ASM_WORD_INSN "1b, %c0\n"           \
  30                              "\t.short %c1, %c2\n"                      \
  31                              "\t.org 2b+%c3\n"                          \
  32                              "\t.popsection"                            \
  33                              : : "i" (__FILE__), "i" (__LINE__),        \
  34                              "i" (0), "i" (sizeof(struct bug_entry)) ); \
  35                 unreachable();                                          \
  36         } while(0)
  37
  38 #else
  39 #define BUG()                                                           \
  40         do {                                                            \
  41                 asm volatile(PARISC_BUG_BREAK_ASM : : );                \
  42                 unreachable();                                          \
  43         } while(0)
  44 #endif
  45
  46 #ifdef CONFIG_DEBUG_BUGVERBOSE
  47 #define __WARN_TAINT(taint)                                             \
  48         do {                                                            \
  49                 asm volatile("\n"                                       \
  50                              "1:\t" PARISC_BUG_BREAK_ASM "\n"           \
  51                              "\t.pushsection __bug_table,\"a\"\n"       \
  52                              "2:\t" ASM_WORD_INSN "1b, %c0\n"           \
  53                              "\t.short %c1, %c2\n"                      \
  54                              "\t.org 2b+%c3\n"                          \
  55                              "\t.popsection"                            \
  56                              : : "i" (__FILE__), "i" (__LINE__),        \
  57                              "i" (BUGFLAG_TAINT(taint)),                \
  58                              "i" (sizeof(struct bug_entry)) );          \
  59         } while(0)
  60 #else
  61 #define __WARN_TAINT(taint)                                             \
  62         do {                                                            \
  63                 asm volatile("\n"                                       \
  64                              "1:\t" PARISC_BUG_BREAK_ASM "\n"           \
  65                              "\t.pushsection __bug_table,\"a\"\n"       \
  66                              "2:\t" ASM_WORD_INSN "1b\n"                \
  67                              "\t.short %c0\n"                           \
  68                              "\t.org 2b+%c1\n"                          \
  69                              "\t.popsection"                            \
  70                              : : "i" (BUGFLAG_TAINT(taint)),            \
  71                              "i" (sizeof(struct bug_entry)) );          \
  72         } while(0)
  73 #endif
  74
  75
  76 #define WARN_ON(x) ({                                           \
  77         int __ret_warn_on = !!(x);                              \
  78         if (__builtin_constant_p(__ret_warn_on)) {              \
  79                 if (__ret_warn_on)                              \
  80                         __WARN();                               \
  81         } else {                                                \
  82                 if (unlikely(__ret_warn_on))                    \
  83                         __WARN();                               \
  84         }                                                       \
  85         unlikely(__ret_warn_on);                                \
  86 })
  87
  88 #endif
  89
  90 #include <asm-generic/bug.h>
  91 #endif
  92