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- /* Checking mempcpy for x86-64.
- Copyright (C) 2004-2026 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 <sysdep.h>
- #include "asm-syntax.h"
- #ifndef SHARED
- /* For libc.so this is defined in memcpy.S.
- For libc.a, this is a separate source to avoid
- mempcpy bringing in __chk_fail and all routines
- it calls. */
- .text
- ENTRY (__mempcpy_chk)
- cmpq %rdx, %rcx
- jb __chk_fail
- jmp __mempcpy
- END (__mempcpy_chk)
- libc_hidden_builtin_def (__mempcpy_chk)
- #endif
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