b50f8e42ba
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.
50 lines
1.7 KiB
C
50 lines
1.7 KiB
C
/* Copyright (C) 1991,92,94,95,97,98,2000,2002,2009
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Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <stddef.h>
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#include <setjmp.h>
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#include <signal.h>
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/* Set the signal mask to the one specified in ENV, and jump
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to the position specified in ENV, causing the setjmp
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call there to return VAL, or 1 if VAL is 0. */
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void
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__libc_siglongjmp (sigjmp_buf env, int val)
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{
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/* Perform any cleanups needed by the frames being unwound. */
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_longjmp_unwind (env, val);
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if (env[0].__mask_was_saved)
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/* Restore the saved signal mask. */
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(void) __sigprocmask (SIG_SETMASK, &env[0].__saved_mask,
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(sigset_t *) NULL);
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/* Call the machine-dependent function to restore machine state. */
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__longjmp (env[0].__jmpbuf, val ?: 1);
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}
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#ifndef __libc_siglongjmp
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strong_alias (__libc_siglongjmp, __libc_longjmp)
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libc_hidden_def (__libc_longjmp)
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weak_alias (__libc_siglongjmp, _longjmp)
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weak_alias (__libc_siglongjmp, longjmp)
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weak_alias (__libc_siglongjmp, siglongjmp)
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#endif
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