| 1 | /* Copyright (C) 2009-2022 Free Software Foundation, Inc. |
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| 2 | This file is part of the GNU C Library. |
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| 3 | |
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| 4 | The GNU C Library is free software; you can redistribute it and/or |
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| 5 | modify it under the terms of the GNU Lesser General Public |
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| 6 | License as published by the Free Software Foundation; either |
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| 7 | version 2.1 of the License, or (at your option) any later version. |
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| 8 | |
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| 9 | The GNU C Library is distributed in the hope that it will be useful, |
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 12 | Lesser General Public License for more details. |
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| 13 | |
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| 14 | You should have received a copy of the GNU Lesser General Public |
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| 15 | License along with the GNU C Library. If not, see |
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| 16 | <https://www.gnu.org/licenses/>. */ |
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| 17 | |
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| 18 | #include <stdio.h> |
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| 19 | #include <signal.h> |
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| 20 | #include <sysdep.h> |
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| 21 | #define __longjmp ____longjmp_chk |
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| 22 | #define CHECK_SP(sp) \ |
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| 23 | do { \ |
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| 24 | register unsigned long this_sp asm ("sp"); \ |
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| 25 | if ((unsigned long) (sp) < this_sp) \ |
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| 26 | { \ |
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| 27 | stack_t oss; \ |
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| 28 | int result = INTERNAL_SYSCALL_CALL (sigaltstack, NULL, &oss); \ |
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| 29 | if (!INTERNAL_SYSCALL_ERROR_P (result) \ |
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| 30 | && ((oss.ss_flags & SS_ONSTACK) == 0 \ |
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| 31 | || ((unsigned long) oss.ss_sp + oss.ss_size \ |
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| 32 | - (unsigned long) (sp)) < oss.ss_size)) \ |
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| 33 | __fortify_fail ("longjmp causes uninitialized stack frame"); \ |
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| 34 | } \ |
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| 35 | } while (0) |
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| 36 | |
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| 37 | #include <__longjmp.c> |
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| 38 | |
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