[70936] | 1 | /* $Id: chk_stubs.c 98103 2023-01-17 14:15:46Z vboxsync $ */
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| 2 | /** @file
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| 3 | * glibc stubs for the VirtualBox Guest Addition X11 Client.
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| 4 | */
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| 5 |
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| 6 | /*
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[98103] | 7 | * Copyright (C) 2018-2023 Oracle and/or its affiliates.
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[70936] | 8 | *
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[96407] | 9 | * This file is part of VirtualBox base platform packages, as
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| 10 | * available from https://www.virtualbox.org.
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| 11 | *
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| 12 | * This program is free software; you can redistribute it and/or
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| 13 | * modify it under the terms of the GNU General Public License
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| 14 | * as published by the Free Software Foundation, in version 3 of the
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| 15 | * License.
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| 16 | *
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| 17 | * This program is distributed in the hope that it will be useful, but
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| 18 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 20 | * General Public License for more details.
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| 21 | *
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| 22 | * You should have received a copy of the GNU General Public License
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| 23 | * along with this program; if not, see <https://www.gnu.org/licenses>.
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| 24 | *
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| 25 | * SPDX-License-Identifier: GPL-3.0-only
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[70936] | 26 | */
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| 27 |
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| 28 | /* If we want the binary to be usable with glibc 2.3, we have to prevent
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| 29 | VBoxClient from containing later symbols. This includes resolution of
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| 30 | symbols from supc++ and gcc_eh. */
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| 31 |
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| 32 | #include <stdio.h>
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| 33 | #include <stdarg.h>
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| 34 | #include <string.h>
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| 35 | #include <unistd.h>
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| 36 |
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| 37 | extern int __sprintf_chk(char *psz, int fFlags, size_t cb, const char *pszFormat, ...);
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| 38 | int __sprintf_chk(char *psz, int fFlags, size_t cb, const char *pszFormat, ...)
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| 39 | {
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| 40 | int rc;
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| 41 | va_list va;
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| 42 |
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| 43 | (void)fFlags;
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| 44 | va_start(va, pszFormat);
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| 45 | rc = vsnprintf(psz, cb, pszFormat, va);
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| 46 | va_end(va);
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| 47 | return rc;
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| 48 | }
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| 49 |
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| 50 | extern void __stack_chk_fail(void);
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| 51 | void __stack_chk_fail(void)
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| 52 | {
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| 53 | fprintf(stderr, "Stack check failed!\n");
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| 54 | _exit(1);
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| 55 | }
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| 56 |
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| 57 | #ifdef __x86_64
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| 58 | /* Furthermore, wrap references to memcpy to force them to go to the right
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| 59 | * version. We are forced to do it this way because the shared libraries
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| 60 | * supc++ and gcc_eh contain references which we cannot change. */
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[72122] | 61 |
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[72137] | 62 | extern void *__wrap_memcpy(void *dest, const void *src, size_t n);
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[72122] | 63 |
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[70936] | 64 | asm (".symver memcpy, memcpy@GLIBC_2.2.5");
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| 65 | void *__wrap_memcpy(void *dest, const void *src, size_t n)
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| 66 | {
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| 67 | return memcpy(dest, src, n);
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| 68 | }
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| 69 | #endif
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