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c867597b 1/* Checking memmove for x86-64.
04277e02 2 Copyright (C) 2016-2019 Free Software Foundation, Inc.
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3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
59ba27a6 16 License along with the GNU C Library; if not, see
5a82c748 17 <https://www.gnu.org/licenses/>. */
0354e355 18
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19#include <sysdep.h>
20#include "asm-syntax.h"
0354e355 21
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22#ifndef SHARED
23 /* For libc.so this is defined in memmove.S.
24 For libc.a, this is a separate source to avoid
25 memmove bringing in __chk_fail and all routines
26 it calls. */
27 .text
28ENTRY (__memmove_chk)
29 cmpq %rdx, %rcx
30 jb __chk_fail
31 jmp memmove
32END (__memmove_chk)
0354e355 33#endif