sysdeps/sh/____longjmp_chk.S

   1 /* Copyright (C) 2009-2015 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 Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <http://www.gnu.org/licenses/>.  */
  17
  18         .section .rodata.str1.1,"aMS",@progbits,1
  19         .type   longjmp_msg,@object
  20 longjmp_msg:
  21         .string "longjmp causes uninitialized stack frame"
  22         .size   longjmp_msg, .-longjmp_msg
  23         .text
  24
  25 #define __longjmp ____longjmp_chk
  26
  27 #ifdef PIC
  28 # define CALL_FAIL \
  29         mov.l   .Lfail, r1;                             \
  30         mov.l   .Lstr, r4;                              \
  31         mov.l   r12, @-r15;                             \
  32         cfi_remember_state;                             \
  33         cfi_adjust_cfa_offset (4);                      \
  34         cfi_rel_offset (r12, 0);                        \
  35         mova    .Lgot, r0;                              \
  36         mov.l   .Lgot, r12;                             \
  37         add     r0, r12;                                \
  38         sts.l   pr, @-r15;                              \
  39         cfi_adjust_cfa_offset (4);                      \
  40         cfi_rel_offset (pr, 0);                         \
  41         bsrf    r1;                                     \
  42          add    r12, r4;                                \
  43         /* Unreachable.  */                             \
  44 .Lfail0:                                                \
  45         .align  2;                                      \
  46 .Lgot:                                                  \
  47         .long   _GLOBAL_OFFSET_TABLE_;                  \
  48 .Lstr:                                                  \
  49         .long   longjmp_msg@GOTOFF;                     \
  50 .Lfail:                                                 \
  51         .long   __GI___fortify_fail@PLT-(.Lfail0-.);    \
  52         cfi_restore_state;
  53 #else
  54 # define CALL_FAIL \
  55         mov.l   .Lfail, r1;                             \
  56         mov.l   .Lstr, r4;                              \
  57         sts.l   pr, @-r15;                              \
  58         cfi_remember_state;                             \
  59         cfi_adjust_cfa_offset (4);                      \
  60         cfi_rel_offset (pr, 0);                         \
  61         jsr     @r1;                                    \
  62          nop;                                           \
  63         /* Unreachable.  */                             \
  64         .align  2;                                      \
  65 .Lstr:                                                  \
  66         .long   longjmp_msg;                            \
  67 .Lfail:                                                 \
  68         .long   __fortify_fail;                         \
  69         cfi_restore_state;
  70 #endif
  71
  72 #define CHECK_SP(reg) \
  73         cmp/hs  r15, reg;                               \
  74         bt      .Lok;                                   \
  75         CALL_FAIL                                       \
  76 .Lok:
  77
  78 #include <__longjmp.S>