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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2015-08-05 17:04:01 -0300 |
commit | 57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch) | |
tree | 5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/arm/include/asm/ftrace.h |
Initial import
Diffstat (limited to 'arch/arm/include/asm/ftrace.h')
-rw-r--r-- | arch/arm/include/asm/ftrace.h | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/arch/arm/include/asm/ftrace.h b/arch/arm/include/asm/ftrace.h new file mode 100644 index 000000000..bfe2a2f5a --- /dev/null +++ b/arch/arm/include/asm/ftrace.h @@ -0,0 +1,59 @@ +#ifndef _ASM_ARM_FTRACE +#define _ASM_ARM_FTRACE + +#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 + +static 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 */ |