LXR linux/arch/xtensa/include/asm/stacktrace.h

   1/*
   2 * arch/xtensa/include/asm/stacktrace.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) 2001 - 2013 Tensilica Inc.
   9 */
  10#ifndef _XTENSA_STACKTRACE_H
  11#define _XTENSA_STACKTRACE_H
  12
  13#include <linux/sched.h>
  14
  15struct stackframe {
  16        unsigned long pc;
  17        unsigned long sp;
  18};
  19
  20static __always_inline unsigned long *stack_pointer(struct task_struct *task)
  21{
  22        unsigned long *sp;
  23
  24        if (!task || task == current)
  25                __asm__ __volatile__ ("mov %0, a1\n" : "=a"(sp));
  26        else
  27                sp = (unsigned long *)task->thread.sp;
  28
  29        return sp;
  30}
  31
  32void walk_stackframe(unsigned long *sp,
  33                int (*fn)(struct stackframe *frame, void *data),
  34                void *data);
  35
  36void xtensa_backtrace_kernel(struct pt_regs *regs, unsigned int depth,
  37                             int (*kfn)(struct stackframe *frame, void *data),
  38                             int (*ufn)(struct stackframe *frame, void *data),
  39                             void *data);
  40void xtensa_backtrace_user(struct pt_regs *regs, unsigned int depth,
  41                           int (*ufn)(struct stackframe *frame, void *data),
  42                           void *data);
  43
  44#endif /* _XTENSA_STACKTRACE_H */
  45