include/asm-ppc64/bug.h

   1 #ifndef _PPC64_BUG_H
   2 #define _PPC64_BUG_H
   3
   4 /*
   5  * Define an illegal instr to trap on the bug.
   6  * We don't use 0 because that marks the end of a function
   7  * in the ELF ABI.  That's "Boo Boo" in case you wonder...
   8  */
   9 #define BUG_OPCODE .long 0x00b00b00  /* For asm */
  10 #define BUG_ILLEGAL_INSTR "0x00b00b00" /* For BUG macro */
  11
  12 #ifndef __ASSEMBLY__
  13
  14 struct bug_entry {
  15         unsigned long   bug_addr;
  16         long            line;
  17         const char      *file;
  18         const char      *function;
  19 };
  20
  21 struct bug_entry *find_bug(unsigned long bugaddr);
  22
  23 /*
  24  * If this bit is set in the line number it means that the trap
  25  * is for WARN_ON rather than BUG or BUG_ON.
  26  */
  27 #define BUG_WARNING_TRAP        0x1000000
  28
  29 #ifdef CONFIG_BUG
  30
  31 #define BUG() do {                                                       \
  32         __asm__ __volatile__(                                            \
  33                 "1:     twi 31,0,0\n"                                    \
  34                 ".section __bug_table,\"a\"\n\t"                         \
  35                 "       .llong 1b,%0,%1,%2\n"                            \
  36                 ".previous"                                              \
  37                 : : "i" (__LINE__), "i" (__FILE__), "i" (__FUNCTION__)); \
  38 } while (0)
  39
  40 #define BUG_ON(x) do {                                          \
  41         __asm__ __volatile__(                                   \
  42                 "1:     tdnei %0,0\n"                           \
  43                 ".section __bug_table,\"a\"\n\t"                \
  44                 "       .llong 1b,%1,%2,%3\n"                   \
  45                 ".previous"                                     \
  46                 : : "r" ((long long)(x)), "i" (__LINE__),       \
  47                     "i" (__FILE__), "i" (__FUNCTION__));        \
  48 } while (0)
  49
  50 #define WARN_ON(x) do {                                         \
  51         __asm__ __volatile__(                                   \
  52                 "1:     tdnei %0,0\n"                           \
  53                 ".section __bug_table,\"a\"\n\t"                \
  54                 "       .llong 1b,%1,%2,%3\n"                   \
  55                 ".previous"                                     \
  56                 : : "r" ((long long)(x)),                       \
  57                     "i" (__LINE__ + BUG_WARNING_TRAP),          \
  58                     "i" (__FILE__), "i" (__FUNCTION__));        \
  59 } while (0)
  60
  61 #define HAVE_ARCH_BUG
  62 #define HAVE_ARCH_BUG_ON
  63 #define HAVE_ARCH_WARN_ON
  64 #endif
  65 #endif
  66
  67 #include <asm-generic/bug.h>
  68
  69 #endif