1 /* Copy memory block and return pointer to beginning of destination block
3 This file is part of the GNU C Library.
4 Copyright (C) 1999, 2000, 2003, 2004, 2008 Free Software Foundation, Inc.
5 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
22 #include "asm-syntax.h"
26 #define PARMS LINKAGE /* no space for saved regs */
28 #define DEST RTN+RTN_SIZE
29 #define SRC DEST+PTR_SIZE
30 #define LEN SRC+PTR_SIZE
33 #if defined PIC && !defined NOT_IN_libc
34 ENTRY_CHK (__memcpy_chk)
37 jb HIDDEN_JUMPTARGET (__chk_fail)
38 END_CHK (__memcpy_chk)
40 ENTRY (BP_SYM (memcpy))
81 .Lend: movl %eax, %edi
84 RETURN_BOUNDED_POINTER (DEST(%esp))
89 /* When we come here the pointers do not have the same
90 alignment or the length is too short. No need to optimize for
91 aligned memory accesses. */
102 END (BP_SYM (memcpy))
103 libc_hidden_builtin_def (memcpy)