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 #define CALLER_ADDR0 ({ 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 #ifdef CONFIG_FRAME_POINTER 23 extern unsigned long return_address(unsigned level); 24 #define CALLER_ADDR1 return_address(1) 25 #define CALLER_ADDR2 return_address(2) 26 #define CALLER_ADDR3 return_address(3) 27 #else 28 #define CALLER_ADDR1 (0) 29 #define CALLER_ADDR2 (0) 30 #define CALLER_ADDR3 (0) 31 #endif 32 33 #endif /* _XTENSA_FTRACE_H */ 34