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/arch/xtensa/include/asm/ftrace.h

http://github.com/mirrors/linux
C Header | 40 lines | 24 code | 7 blank | 9 comment | 0 complexity | 12865100ef97a85eba921c6eb5a75078 MD5 | raw file
 1/*
 2 * arch/xtensa/include/asm/ftrace.h
 3 *
 4 * This file is subject to the terms and conditions of the GNU General Public
 5 * License.  See the file "COPYING" in the main directory of this archive
 6 * for more details.
 7 *
 8 * Copyright (C) 2013 Tensilica Inc.
 9 */
10#ifndef _XTENSA_FTRACE_H
11#define _XTENSA_FTRACE_H
12
13#include <asm/processor.h>
14
15#ifndef __ASSEMBLY__
16#define ftrace_return_address0 ({ unsigned long a0, a1; \
17		__asm__ __volatile__ ( \
18			"mov %0, a0\n" \
19			"mov %1, a1\n" \
20			: "=r"(a0), "=r"(a1)); \
21		MAKE_PC_FROM_RA(a0, a1); })
22
23#ifdef CONFIG_FRAME_POINTER
24extern unsigned long return_address(unsigned level);
25#define ftrace_return_address(n) return_address(n)
26#endif
27#endif /* __ASSEMBLY__ */
28
29#ifdef CONFIG_FUNCTION_TRACER
30
31#define MCOUNT_ADDR ((unsigned long)(_mcount))
32#define MCOUNT_INSN_SIZE 3
33
34#ifndef __ASSEMBLY__
35extern void _mcount(void);
36#define mcount _mcount
37#endif /* __ASSEMBLY__ */
38#endif /* CONFIG_FUNCTION_TRACER */
39
40#endif /* _XTENSA_FTRACE_H */