sysdeps/sparc/sparc64/backtrace.c

   1 /* Return backtrace of current program state.
   2    Copyright (C) 2008 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4    Contributed by David S. Miller <davem@davemloft.net>
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Library General Public License as
   8    published by the Free Software Foundation; either version 2 of the
   9    License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Library General Public License for more details.
  15
  16    You should have received a copy of the GNU Library General Public
  17    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  18    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  19    Boston, MA 02111-1307, USA.  */
  20
  21 #include <execinfo.h>
  22 #include <stddef.h>
  23 #include <bp-checks.h>
  24 #include <sysdep.h>
  25
  26 struct layout
  27 {
  28   unsigned long locals[8];
  29   unsigned long ins[6];
  30   unsigned long next;
  31   void *__unbounded return_address;
  32 };
  33
  34 int
  35 __backtrace (void **array, int size)
  36 {
  37   struct layout *current;
  38   unsigned long fp;
  39   int count;
  40
  41   asm volatile ("flushw");
  42   asm volatile ("mov %%fp, %0" : "=r"(fp));
  43   current = (struct layout *__unbounded) (fp + STACK_BIAS);
  44   current = BOUNDED_1 (current);
  45
  46   for (count = 0; count < size; count++)
  47     {
  48       array[count] = current->return_address;
  49       if (!current->next)
  50         break;
  51       current = (struct layout *__unbounded) (current->next + STACK_BIAS);
  52       current = BOUNDED_1 (current);
  53     }
  54
  55   return count;
  56 }
  57 weak_alias (__backtrace, backtrace)
  58 libc_hidden_def (__backtrace)