glibc/debug/memmove_chk.c
Frédéric Bérat dd8486ffc1 string: Ensure *_chk routines have their hidden builtin definition available
If libc_hidden_builtin_{def,proto} isn't properly set for *_chk routines,
there are unwanted PLT entries in libc.so.

Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
2023-07-05 16:59:48 +02:00

36 lines
1.2 KiB
C

/* Copy memory to memory until the specified number of bytes
has been copied with error checking. Overlap is handled correctly.
Copyright (C) 1991-2023 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <string.h>
#include <memcopy.h>
#ifndef MEMMOVE_CHK
# define MEMMOVE_CHK __memmove_chk
#endif
void *
MEMMOVE_CHK (void *dest, const void *src, size_t len, size_t destlen)
{
if (__glibc_unlikely (destlen < len))
__chk_fail ();
return memmove (dest, src, len);
}
libc_hidden_builtin_def (MEMMOVE_CHK)