arch/arm/include/asm/ftrace.h

   1 #ifndef _ASM_ARM_FTRACE
   2 #define _ASM_ARM_FTRACE
   3
   4 #ifdef CONFIG_FUNCTION_TRACER
   5 #define MCOUNT_ADDR             ((long)(mcount))
   6 #define MCOUNT_INSN_SIZE        4 /* sizeof mcount call */
   7
   8 #ifndef __ASSEMBLY__
   9 extern void mcount(void);
  10 #endif
  11
  12 #endif
  13
  14 #ifndef __ASSEMBLY__
  15
  16 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND)
  17 /*
  18  * return_address uses walk_stackframe to do it's work.  If both
  19  * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind
  20  * information.  For this to work in the function tracer many functions would
  21  * have to be marked with __notrace.  So for now just depend on
  22  * !CONFIG_ARM_UNWIND.
  23  */
  24
  25 void *return_address(unsigned int);
  26
  27 #else
  28
  29 extern inline void *return_address(unsigned int level)
  30 {
  31         return NULL;
  32 }
  33
  34 #endif
  35
  36 #define HAVE_ARCH_CALLER_ADDR
  37
  38 #define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
  39 #define CALLER_ADDR1 ((unsigned long)return_address(1))
  40 #define CALLER_ADDR2 ((unsigned long)return_address(2))
  41 #define CALLER_ADDR3 ((unsigned long)return_address(3))
  42 #define CALLER_ADDR4 ((unsigned long)return_address(4))
  43 #define CALLER_ADDR5 ((unsigned long)return_address(5))
  44 #define CALLER_ADDR6 ((unsigned long)return_address(6))
  45
  46 #endif /* ifndef __ASSEMBLY__ */
  47
  48 #endif /* _ASM_ARM_FTRACE */