include/asm-ppc/bug.h

   1 #ifndef _PPC_BUG_H
   2 #define _PPC_BUG_H
   3
   4 struct bug_entry {
   5         unsigned long   bug_addr;
   6         int             line;
   7         const char      *file;
   8         const char      *function;
   9 };
  10
  11 /*
  12  * If this bit is set in the line number it means that the trap
  13  * is for WARN_ON rather than BUG or BUG_ON.
  14  */
  15 #define BUG_WARNING_TRAP        0x1000000
  16
  17 #define BUG() do {                                                       \
  18         __asm__ __volatile__(                                            \
  19                 "1:     twi 31,0,0\n"                                    \
  20                 ".section __bug_table,\"a\"\n\t"                         \
  21                 "       .long 1b,%0,%1,%2\n"                             \
  22                 ".previous"                                              \
  23                 : : "i" (__LINE__), "i" (__FILE__), "i" (__FUNCTION__)); \
  24 } while (0)
  25
  26 #define BUG_ON(x) do {                                                  \
  27         if (!__builtin_constant_p(x) || (x)) {                          \
  28                 __asm__ __volatile__(                                   \
  29                         "1:     twnei %0,0\n"                           \
  30                         ".section __bug_table,\"a\"\n\t"                \
  31                         "       .long 1b,%1,%2,%3\n"                    \
  32                         ".previous"                                     \
  33                         : : "r" (x), "i" (__LINE__), "i" (__FILE__),    \
  34                             "i" (__FUNCTION__));                        \
  35         }                                                               \
  36 } while (0)
  37
  38 #define PAGE_BUG(page)  BUG()
  39
  40 #define WARN_ON(x) do {                                                 \
  41         if (!__builtin_constant_p(x) || (x)) {                          \
  42                 __asm__ __volatile__(                                   \
  43                         "1:     twnei %0,0\n"                           \
  44                         ".section __bug_table,\"a\"\n\t"                \
  45                         "       .long 1b,%1,%2,%3\n"                    \
  46                         ".previous"                                     \
  47                         : : "r" (x), "i" (__LINE__ + BUG_WARNING_TRAP), \
  48                             "i" (__FILE__), "i" (__FUNCTION__));        \
  49         }                                                               \
  50 } while (0)
  51
  52 #endif