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 24 extern 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__ 35 extern void _mcount(void); 36 #define mcount _mcount 37 #endif /* __ASSEMBLY__ */ 38 #endif /* CONFIG_FUNCTION_TRACER */ 39 40 #endif /* _XTENSA_FTRACE_H */ 41