LXR linux/arch/xtensa/oprofile/backtrace.c

   1/**
   2 * @file backtrace.c
   3 *
   4 * @remark Copyright 2008 Tensilica Inc.
   5 * Copyright (C) 2015 Cadence Design Systems Inc.
   6 * @remark Read the file COPYING
   7 *
   8 */
   9
  10#include <linux/oprofile.h>
  11#include <asm/ptrace.h>
  12#include <asm/stacktrace.h>
  13
  14static int xtensa_backtrace_cb(struct stackframe *frame, void *data)
  15{
  16        oprofile_add_trace(frame->pc);
  17        return 0;
  18}
  19
  20void xtensa_backtrace(struct pt_regs * const regs, unsigned int depth)
  21{
  22        if (user_mode(regs))
  23                xtensa_backtrace_user(regs, depth, xtensa_backtrace_cb, NULL);
  24        else
  25                xtensa_backtrace_kernel(regs, depth, xtensa_backtrace_cb,
  26                                        xtensa_backtrace_cb, NULL);
  27}
  28