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 /*
  22  * If this bit is set in the line number it means that the trap
  23  * is for WARN_ON rather than BUG or BUG_ON.
  24  */
  25 #define BUG_WARNING_TRAP        0x1000000
  26
  27 #define BUG() do {                                                       \
  28         __asm__ __volatile__(                                            \
  29                 "1:     twi 31,0,0\n"                                    \
  30                 ".section __bug_table,\"a\"\n\t"                         \
  31                 "       .llong 1b,%0,%1,%2\n"                            \
  32                 ".previous"                                              \
  33                 : : "i" (__LINE__), "i" (__FILE__), "i" (__FUNCTION__)); \
  34 } while (0)
  35
  36 #define BUG_ON(x) do {                                          \
  37         __asm__ __volatile__(                                   \
  38                 "1:     tdnei %0,0\n"                           \
  39                 ".section __bug_table,\"a\"\n\t"                \
  40                 "       .llong 1b,%1,%2,%3\n"                   \
  41                 ".previous"                                     \
  42                 : : "r" (x), "i" (__LINE__), "i" (__FILE__),    \
  43                     "i" (__FUNCTION__));                        \
  44 } while (0)
  45
  46 #define PAGE_BUG(page) do { BUG(); } while (0)
  47
  48 #define WARN_ON(x) do {                                         \
  49         __asm__ __volatile__(                                   \
  50                 "1:     tdnei %0,0\n"                           \
  51                 ".section __bug_table,\"a\"\n\t"                \
  52                 "       .llong 1b,%1,%2,%3\n"                   \
  53                 ".previous"                                     \
  54                 : : "r" (x), "i" (__LINE__ + BUG_WARNING_TRAP), \
  55                     "i" (__FILE__), "i" (__FUNCTION__));        \
  56 } while (0)
  57
  58 #endif
  59 #endif