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 static inline void *return_address(unsigned int level) 49 { 50 return NULL; 51 } 52 53 #endif 54 55 #define ftrace_return_address(n) return_address(n) 56 57 #endif /* ifndef __ASSEMBLY__ */ 58 59 #endif /* _ASM_ARM_FTRACE */ 60