sysdeps/powerpc/powerpc64/setjmp-bug21895.c

   1 /* Shared object part of test for setjmp interoperability with static
   2    dlopen BZ #21895.
   3    Copyright (C) 2017-2018 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the 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    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <string.h>
  21 #include <setjmp.h>
  22
  23 /* Copy r1 adress to a local variable.  */
  24 #define GET_STACK_POINTER(sp)     \
  25   ({                              \
  26     asm volatile ("mr %0, 1\n\t"  \
  27                   : "=r" (sp));   \
  28   })
  29
  30 jmp_buf jb;
  31 void (*bar)(jmp_buf, unsigned long);
  32
  33 void
  34 lbar (unsigned long sp)
  35 {
  36   bar(jb, sp);
  37   for(;;);
  38 }
  39
  40 void
  41 foo (void)
  42 {
  43   unsigned long sp;
  44   /* Copy r1 (stack pointer) to sp. It will be use later to get
  45      TOC area.  */
  46   GET_STACK_POINTER(sp);
  47   setjmp(jb);
  48   lbar(sp);
  49
  50   for(;;);
  51 }