diff options
Diffstat (limited to 'arch/arm/include/asm/ftrace.h')
| -rw-r--r-- | arch/arm/include/asm/ftrace.h | 49 |
1 files changed, 47 insertions, 2 deletions
diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h index 584ef9a8e5a..39eb16b0066 100644 --- a/arch/arm/include/asm/ftrace.h +++ b/arch/arm/include/asm/ftrace.h @@ -1,14 +1,59 @@ #ifndef _ASM_ARM_FTRACE #define _ASM_ARM_FTRACE -#ifdef CONFIG_FTRACE -#define MCOUNT_ADDR ((long)(mcount)) +#ifdef CONFIG_FUNCTION_TRACER +#define MCOUNT_ADDR ((unsigned long)(__gnu_mcount_nc)) #define MCOUNT_INSN_SIZE 4 /* sizeof mcount call */ #ifndef __ASSEMBLY__ extern void mcount(void); +extern void __gnu_mcount_nc(void); + +#ifdef CONFIG_DYNAMIC_FTRACE +struct dyn_arch_ftrace { +#ifdef CONFIG_OLD_MCOUNT + bool old_mcount; +#endif +}; + +static inline unsigned long ftrace_call_adjust(unsigned long addr) +{ + /* With Thumb-2, the recorded addresses have the lsb set */ + return addr & ~1; +} + +extern void ftrace_caller_old(void); +extern void ftrace_call_old(void); +#endif + +#endif + #endif +#ifndef __ASSEMBLY__ + +#if defined(CONFIG_FRAME_POINTER) && !defined(CONFIG_ARM_UNWIND) +/* + * return_address uses walk_stackframe to do it's work. If both + * CONFIG_FRAME_POINTER=y and CONFIG_ARM_UNWIND=y walk_stackframe uses unwind + * information. For this to work in the function tracer many functions would + * have to be marked with __notrace. So for now just depend on + * !CONFIG_ARM_UNWIND. + */ + +void *return_address(unsigned int); + +#else + +extern inline void *return_address(unsigned int level) +{ + return NULL; +} + #endif +#define ftrace_return_address(n) return_address(n) + +#endif /* ifndef __ASSEMBLY__ */ + #endif /* _ASM_ARM_FTRACE */ |