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Linux/arch/arm/include/asm/ftrace.h

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  1 #ifndef _ASM_ARM_FTRACE
  2 #define _ASM_ARM_FTRACE
  3 
  4 #ifdef CONFIG_FUNCTION_TRACER
  5 #define MCOUNT_ADDR             ((unsigned long)(__gnu_mcount_nc))
  6 #define MCOUNT_INSN_SIZE        4 /* sizeof mcount call */
  7 
  8 #ifndef __ASSEMBLY__
  9 extern void mcount(void);
 10 extern void __gnu_mcount_nc(void);
 11 
 12 #ifdef CONFIG_DYNAMIC_FTRACE
 13 struct dyn_arch_ftrace {
 14 #ifdef CONFIG_OLD_MCOUNT
 15         bool    old_mcount;
 16 #endif
 17 };
 18 
 19 static inline unsigned long ftrace_call_adjust(unsigned long addr)
 20 {
 21         /* With Thumb-2, the recorded addresses have the lsb set */
 22         return addr & ~1;
 23 }
 24 
 25 extern void ftrace_caller_old(void);
 26 extern void ftrace_call_old(void);
 27 #endif
 28 
 29 #endif
 30 
 31 #endif
 32 
 33 #ifndef __ASSEMBLY__
 34 
 35 #if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND)
 36 /*
 37  * return_address uses walk_stackframe to do it's work.  If both
 38  * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind
 39  * information.  For this to work in the function tracer many functions would
 40  * have to be marked with __notrace.  So for now just depend on
 41  * !CONFIG_ARM_UNWIND.
 42  */
 43 
 44 void *return_address(unsigned int);
 45 
 46 #else
 47 
 48 extern inline void *return_address(unsigned int level)
 49 {
 50         return NULL;
 51 }
 52 
 53 #endif
 54 
 55 #define HAVE_ARCH_CALLER_ADDR
 56 
 57 #define CALLER_ADDR0 ((unsigned long)__builtin_return_address(0))
 58 #define CALLER_ADDR1 ((unsigned long)return_address(1))
 59 #define CALLER_ADDR2 ((unsigned long)return_address(2))
 60 #define CALLER_ADDR3 ((unsigned long)return_address(3))
 61 #define CALLER_ADDR4 ((unsigned long)return_address(4))
 62 #define CALLER_ADDR5 ((unsigned long)return_address(5))
 63 #define CALLER_ADDR6 ((unsigned long)return_address(6))
 64 
 65 #endif /* ifndef __ASSEMBLY__ */
 66 
 67 #endif /* _ASM_ARM_FTRACE */
 68 

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