arch/xtensa/include/asm/ftrace.h

   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 #define HAVE_ARCH_CALLER_ADDR
  16 #ifndef __ASSEMBLY__
  17 #define CALLER_ADDR0 ({ unsigned long a0, a1; \
  18                 __asm__ __volatile__ ( \
  19                         "mov %0, a0\n" \
  20                         "mov %1, a1\n" \
  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__ */
  34
  35 #ifdef CONFIG_FUNCTION_TRACER
  36
  37 #define MCOUNT_ADDR ((unsigned long)(_mcount))
  38 #define MCOUNT_INSN_SIZE 3
  39
  40 #ifndef __ASSEMBLY__
  41 extern void _mcount(void);
  42 #define mcount _mcount
  43 #endif /* __ASSEMBLY__ */
  44 #endif /* CONFIG_FUNCTION_TRACER */
  45
  46 #endif /* _XTENSA_FTRACE_H */