diff options
Diffstat (limited to 'sysdeps/i386/____longjmp_chk.S')
| -rw-r--r-- | sysdeps/i386/____longjmp_chk.S | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/sysdeps/i386/____longjmp_chk.S b/sysdeps/i386/____longjmp_chk.S new file mode 100644 index 0000000000..6cd74968a2 --- /dev/null +++ b/sysdeps/i386/____longjmp_chk.S @@ -0,0 +1,45 @@ +/* Copyright (C) 2001,2004,2005,2006,2009 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + + .section .rodata.str1.1,"aMS",@progbits,1 + .type longjmp_msg,@object +longjmp_msg: + .string "longjmp causes uninitialized stack frame" + .size longjmp_msg, .-longjmp_msg + + +#define __longjmp ____longjmp_chk + +#ifdef PIC +# define CALL_FAIL movl %ebx, %ecx; \ + cfi_register(%ebx,%ecx); \ + LOAD_PIC_REG (bx); \ + leal longjmp_msg@GOTOFF(%ebx), %eax; \ + call __GI___fortify_fail@PLT +#else +# define CALL_FAIL movl $longjmp_msg, %eax; \ + call __fortify_fail +#endif + +#define CHECK_ESP(reg) \ + cmpl reg, %esp; \ + jbe .Lok; \ + CALL_FAIL; \ +.Lok: + +#include "__longjmp.S" |