2 * arch/xtensa/include/asm/ftrace.h
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
8 * Copyright (C) 2013 Tensilica Inc.
10 #ifndef _XTENSA_FTRACE_H
11 #define _XTENSA_FTRACE_H
13 #include <asm/processor.h>
15 #define HAVE_ARCH_CALLER_ADDR
17 #define CALLER_ADDR0 ({ unsigned long a0, a1; \
18 __asm__ __volatile__ ( \
21 : "=r"(a0), "=r"(a1) : : ); \
22 MAKE_PC_FROM_RA(a0, a1); })
23 #ifdef CONFIG_FRAME_POINTER
24 extern unsigned long return_address(unsigned level
);
25 #define CALLER_ADDR1 return_address(1)
26 #define CALLER_ADDR2 return_address(2)
27 #define CALLER_ADDR3 return_address(3)
28 #else /* CONFIG_FRAME_POINTER */
29 #define CALLER_ADDR1 (0)
30 #define CALLER_ADDR2 (0)
31 #define CALLER_ADDR3 (0)
32 #endif /* CONFIG_FRAME_POINTER */
33 #endif /* __ASSEMBLY__ */
35 #ifdef CONFIG_FUNCTION_TRACER
37 #define MCOUNT_ADDR ((unsigned long)(_mcount))
38 #define MCOUNT_INSN_SIZE 3
41 extern void _mcount(void);
42 #define mcount _mcount
43 #endif /* __ASSEMBLY__ */
44 #endif /* CONFIG_FUNCTION_TRACER */
46 #endif /* _XTENSA_FTRACE_H */