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48 lines
2.1 KiB
C
48 lines
2.1 KiB
C
/* Copyright (C) 2009-2016 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 General Public License
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along with GCC; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include <stdio.h>
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#include <signal.h>
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#include <sysdep.h>
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#define __longjmp ____longjmp_chk
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#define CHECK_SP(sp) \
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do { \
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register unsigned long this_sp asm ("r30"); \
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/* The stack grows up, therefore frames that were created and then \
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destroyed must all have stack values higher than ours. */ \
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if ((unsigned long) (sp) > this_sp) \
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{ \
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struct sigaltstack oss; \
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INTERNAL_SYSCALL_DECL (err); \
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int result = INTERNAL_SYSCALL (sigaltstack, err, 2, NULL, &oss);\
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/* If we aren't using an alternate stack then we have already \
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shown that we are jumping to a frame that doesn't exist so \
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error out. If we are using an alternate stack we must prove \
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that we are jumping *out* of the alternate stack. Note that \
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the check for that is the same as that for _STACK_GROWS_UP \
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as for _STACK_GROWS_DOWN. */ \
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if (!INTERNAL_SYSCALL_ERROR_P (result, err) \
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&& ((oss.ss_flags & SS_ONSTACK) == 0 \
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|| ((unsigned long) oss.ss_sp + oss.ss_size \
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- (unsigned long) (sp)) < oss.ss_size)) \
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__fortify_fail ("longjmp causes uninitialized stack frame"); \
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} \
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} while (0)
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#include <__longjmp.c>
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