sysdeps/arm/____longjmp_chk.S

   1 /* Copyright (C) 2009 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with GCC; see the file COPYING.  If not, write to the Free
  16    Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  17    02110-1301, USA.  */
  18
  19
  20         .section .rodata.str1.1,"aMS",%progbits,1
  21         .type   longjmp_msg,%object
  22 longjmp_msg:
  23         .string "longjmp causes uninitialized stack frame"
  24         .size   longjmp_msg, .-longjmp_msg
  25         .text
  26
  27 #define __longjmp ____longjmp_chk
  28
  29 #ifdef PIC
  30 # define CALL_FAIL                                              \
  31         ldr     sl, .L_GOT;                                     \
  32 .L_GOT_OFF:                                                     \
  33         add     sl, pc, sl;                                     \
  34         ldr     r0, .Lstr;                                      \
  35         add     r0, sl, r0;                                     \
  36         B       PLTJMP(HIDDEN_JUMPTARGET(__fortify_fail));      \
  37 .L_GOT:                                                         \
  38         .word   _GLOBAL_OFFSET_TABLE_-(.L_GOT_OFF+8);           \
  39 .Lstr:                                                          \
  40         .word   longjmp_msg(GOTOFF);
  41 #else
  42 # define CALL_FAIL                                      \
  43         ldr     r0, .Lstr;                              \
  44         B       HIDDEN_JUMPTARGET(__fortify_fail);      \
  45 .Lstr:                                                  \
  46         .word   longjmp_msg;
  47 #endif
  48
  49 #define CHECK_SP(reg)                           \
  50         cmp     sp, reg;                                \
  51         bls     .Lok;                           \
  52         CALL_FAIL                               \
  53 .Lok:
  54
  55 #include <__longjmp.S>