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
  14 static int xtensa_backtrace_cb(struct stackframe *frame, void *data)
  15 {
  16         oprofile_add_trace(frame->pc);
  17         return 0;
  18 }
  19
  20 void 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 }