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| author | Ulrich Drepper <drepper@redhat.com> | 2009-05-15 19:28:04 -0700 |
|---|---|---|
| committer | Ulrich Drepper <drepper@redhat.com> | 2009-05-15 19:37:13 -0700 |
| commit | b50f8e42ba3010f0141e6a482e0820f658e89b63 (patch) | |
| tree | 80cef469731d5857499883d45fd3424730f0db7c /setjmp/bits | |
| parent | f1342e0be8e222dbca077beca94b5937564e8c4b (diff) | |
| download | glibc-b50f8e42ba3010f0141e6a482e0820f658e89b63.tar.gz glibc-b50f8e42ba3010f0141e6a482e0820f658e89b63.tar.xz glibc-b50f8e42ba3010f0141e6a482e0820f658e89b63.zip | |
Check for valid stack frame in longjmp.
If longjmp restores the stack frame to an address which is beyond the stack frame at the time of the longjmp call it would install an uninitialized stack frame. If compiled with _FORTIFY_SOURCE defined, longjmp will now bail out in this situation.
Diffstat (limited to 'setjmp/bits')
| -rw-r--r-- | setjmp/bits/setjmp2.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/setjmp/bits/setjmp2.h b/setjmp/bits/setjmp2.h new file mode 100644 index 0000000000..ba900b8d03 --- /dev/null +++ b/setjmp/bits/setjmp2.h @@ -0,0 +1,41 @@ +/* Checking macros for setjmp functions. + * Copyright (C) 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. */ + +#ifndef _SETJMP_H +# error "Never include <bits/setjmp2.h> directly; use <setjmp.h> instead." +#endif + +/* Variant of the longjmp functions which perform some sanity checking. */ +#ifdef __REDIRECT_NTH +extern void __REDIRECT_NTH (longjmp, + (struct __jmp_buf_tag __env[1], int __val), + __longjmp_chk) __attribute__ ((__noreturn__)); +extern void __REDIRECT_NTH (_longjmp, + (struct __jmp_buf_tag __env[1], int __val), + __longjmp_chk) __attribute__ ((__noreturn__)); +extern void __REDIRECT_NTH (siglongjmp, + (struct __jmp_buf_tag __env[1], int __val), + __longjmp_chk) __attribute__ ((__noreturn__)); +#else +extern void __longjmp_chk (struct __jmp_buf_tag __env[1], int __val), + __THROW __attribute__ ((__noreturn__)); +# define longjmp __longjmp_chk +# define _longjmp __longjmp_chk +# define siglongjmp __longjmp_chk +#endif |