[GitHub/exynos8895/android_kernel_samsung_universal8895.git] / arch / arm64 / include / asm / ftrace.h

/*
 * arch/arm64/include/asm/ftrace.h
 *
 * Copyright (C) 2013 Linaro Limited
 * Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#ifndef __ASM_FTRACE_H
#define __ASM_FTRACE_H

#include <asm/insn.h>

#define MCOUNT_ADDR		((unsigned long)_mcount)
#define MCOUNT_INSN_SIZE	AARCH64_INSN_SIZE

#ifndef __ASSEMBLY__
#include <linux/compat.h>

extern void _mcount(unsigned long);
extern void *return_address(unsigned int);

struct dyn_arch_ftrace {
	/* No extra data needed for arm64 */
};

extern unsigned long ftrace_graph_call;

extern void return_to_handler(void);

static inline unsigned long ftrace_call_adjust(unsigned long addr)
{
	/*
	 * addr is the address of the mcount call instruction.
	 * recordmcount does the necessary offset calculation.
	 */
	return addr;
}

#define ftrace_return_address(n) return_address(n)

/*
 * Because AArch32 mode does not share the same syscall table with AArch64,
 * tracing compat syscalls may result in reporting bogus syscalls or even
 * hang-up, so just do not trace them.
 * See kernel/trace/trace_syscalls.c
 *
 * x86 code says:
 * If the user realy wants these, then they should use the
 * raw syscall tracepoints with filtering.
 */
#define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS
static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs)
{
	return is_compat_task();
}
#endif /* ifndef __ASSEMBLY__ */

#endif /* __ASM_FTRACE_H */
Commit	Line	Data
819e50e2 AT	1	/*
	2	* arch/arm64/include/asm/ftrace.h
	3	*
	4	* Copyright (C) 2013 Linaro Limited
	5	* Author: AKASHI Takahiro <takahiro.akashi@linaro.org>
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License version 2 as
	9	* published by the Free Software Foundation.
	10	*/
	11	#ifndef __ASM_FTRACE_H
	12	#define __ASM_FTRACE_H
	13
	14	#include <asm/insn.h>
	15
	16	#define MCOUNT_ADDR ((unsigned long)_mcount)
	17	#define MCOUNT_INSN_SIZE AARCH64_INSN_SIZE
	18
	19	#ifndef __ASSEMBLY__
055b1212 AT	20	#include <linux/compat.h>
055b1212 AT	21
819e50e2	22	extern void _mcount(unsigned long);
3711784e	23	extern void *return_address(unsigned int);
bd7d38db AT	24
	25	struct dyn_arch_ftrace {
	26	/* No extra data needed for arm64 */
	27	};
	28
	29	extern unsigned long ftrace_graph_call;
	30
0c078f6a AT	31	extern void return_to_handler(void);
0c078f6a AT	32
bd7d38db AT	33	static inline unsigned long ftrace_call_adjust(unsigned long addr)
	34	{
	35	/*
	36	* addr is the address of the mcount call instruction.
	37	* recordmcount does the necessary offset calculation.
	38	*/
	39	return addr;
	40	}
3711784e AT	41
3711784e AT	42	#define ftrace_return_address(n) return_address(n)
055b1212 AT	43
	44	/*
	45	* Because AArch32 mode does not share the same syscall table with AArch64,
	46	* tracing compat syscalls may result in reporting bogus syscalls or even
	47	* hang-up, so just do not trace them.
	48	* See kernel/trace/trace_syscalls.c
	49	*
	50	* x86 code says:
	51	* If the user realy wants these, then they should use the
	52	* raw syscall tracepoints with filtering.
	53	*/
	54	#define ARCH_TRACE_IGNORE_COMPAT_SYSCALLS
	55	static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs)
	56	{
	57	return is_compat_task();
	58	}
3711784e	59	#endif /* ifndef __ASSEMBLY__ */
819e50e2 AT	60
819e50e2 AT	61	#endif /* __ASM_FTRACE_H */