/* * arch/xtensa/include/asm/stacktrace.h * * This file is subject to the terms and conditions of the GNU General Public * License.  See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2001 - 2013 Tensilica Inc. */#ifndef _XTENSA_STACKTRACE_H#define _XTENSA_STACKTRACE_H #include <linux/sched.h> struct stackframe {	unsigned long pc;	unsigned long sp;}; static __always_inline unsigned long *stack_pointer(struct task_struct *task){	unsigned long *sp; 	if (!task || task == current)		__asm__ __volatile__ ("mov %0, a1\n" : "=a"(sp));	else		sp = (unsigned long *)task->thread.sp; 	return sp;} void walk_stackframe(unsigned long *sp,		int (*fn)(struct stackframe *frame, void *data),		void *data); void xtensa_backtrace_kernel(struct pt_regs *regs, unsigned int depth,			     int (*kfn)(struct stackframe *frame, void *data),			     int (*ufn)(struct stackframe *frame, void *data),			     void *data);void xtensa_backtrace_user(struct pt_regs *regs, unsigned int depth,			   int (*ufn)(struct stackframe *frame, void *data),			   void *data); #endif /* _XTENSA_STACKTRACE_H */