Release 4.9 arch/arm/include/asm/ftrace.h

#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;
}

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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;
}

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#endif


#define ftrace_return_address(n) return_address(n)

#endif /* ifndef __ASSEMBLY__ */

#endif /* _ASM_ARM_FTRACE */
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Directory: arch/arm/include/asm