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 */ 47