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5337b2af4b
Non-gcc compilers (clang and possibly other compilers that do not
masquerade as gcc 5.0 or later) are unable to use
__warn_memset_zero_len since the symbol is no longer available on
glibc built with gcc 5.0 or later. While it was likely an oversight
that caused this omission, the fact that it wasn't noticed until
recently (when clang closed the gap on _FORTIFY_SUPPORT) that the
symbol was missing.
Given that both gcc and clang are capable of doing this check in the
compiler, drop all remaining signs of __warn_memset_zero_len from
glibc so that no more objects are built with this symbol in future.
(cherry-picked from dc274b1416)
126 lines
3.9 KiB
C
126 lines
3.9 KiB
C
/* Copyright (C) 2004-2020 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, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _BITS_STRING_FORTIFIED_H
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#define _BITS_STRING_FORTIFIED_H 1
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#ifndef _STRING_H
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# error "Never use <bits/string_fortified.h> directly; include <string.h> instead."
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#endif
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__fortify_function void *
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__NTH (memcpy (void *__restrict __dest, const void *__restrict __src,
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size_t __len))
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{
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return __builtin___memcpy_chk (__dest, __src, __len, __bos0 (__dest));
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}
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__fortify_function void *
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__NTH (memmove (void *__dest, const void *__src, size_t __len))
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{
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return __builtin___memmove_chk (__dest, __src, __len, __bos0 (__dest));
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}
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#ifdef __USE_GNU
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__fortify_function void *
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__NTH (mempcpy (void *__restrict __dest, const void *__restrict __src,
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size_t __len))
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{
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return __builtin___mempcpy_chk (__dest, __src, __len, __bos0 (__dest));
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}
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#endif
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/* The first two tests here help to catch a somewhat common problem
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where the second and third parameter are transposed. This is
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especially problematic if the intended fill value is zero. In this
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case no work is done at all. We detect these problems by referring
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non-existing functions. */
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__fortify_function void *
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__NTH (memset (void *__dest, int __ch, size_t __len))
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{
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return __builtin___memset_chk (__dest, __ch, __len, __bos0 (__dest));
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}
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#ifdef __USE_MISC
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# include <bits/strings_fortified.h>
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void __explicit_bzero_chk (void *__dest, size_t __len, size_t __destlen)
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__THROW __nonnull ((1)) __attr_access ((__write_only__, 1, 2));
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__fortify_function void
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__NTH (explicit_bzero (void *__dest, size_t __len))
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{
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__explicit_bzero_chk (__dest, __len, __bos0 (__dest));
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}
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#endif
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__fortify_function char *
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__NTH (strcpy (char *__restrict __dest, const char *__restrict __src))
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{
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return __builtin___strcpy_chk (__dest, __src, __bos (__dest));
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}
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#ifdef __USE_GNU
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__fortify_function char *
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__NTH (stpcpy (char *__restrict __dest, const char *__restrict __src))
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{
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return __builtin___stpcpy_chk (__dest, __src, __bos (__dest));
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}
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#endif
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__fortify_function char *
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__NTH (strncpy (char *__restrict __dest, const char *__restrict __src,
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size_t __len))
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{
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return __builtin___strncpy_chk (__dest, __src, __len, __bos (__dest));
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}
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/* XXX We have no corresponding builtin yet. */
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extern char *__stpncpy_chk (char *__dest, const char *__src, size_t __n,
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size_t __destlen) __THROW
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__attr_access ((__write_only__, 1, 3)) __attr_access ((__read_only__, 2));
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extern char *__REDIRECT_NTH (__stpncpy_alias, (char *__dest, const char *__src,
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size_t __n), stpncpy);
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__fortify_function char *
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__NTH (stpncpy (char *__dest, const char *__src, size_t __n))
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{
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if (__bos (__dest) != (size_t) -1
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&& (!__builtin_constant_p (__n) || __n > __bos (__dest)))
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return __stpncpy_chk (__dest, __src, __n, __bos (__dest));
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return __stpncpy_alias (__dest, __src, __n);
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}
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__fortify_function char *
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__NTH (strcat (char *__restrict __dest, const char *__restrict __src))
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{
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return __builtin___strcat_chk (__dest, __src, __bos (__dest));
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}
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__fortify_function char *
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__NTH (strncat (char *__restrict __dest, const char *__restrict __src,
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size_t __len))
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{
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return __builtin___strncat_chk (__dest, __src, __len, __bos (__dest));
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}
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#endif /* bits/string_fortified.h */
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