| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /*- |
| 2 | * Copyright (c) 1997 The NetBSD Foundation, Inc. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This code is derived from software contributed to The NetBSD Foundation |
| 6 | * by Neil A. Carson and Mark Brinicombe |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. All advertising materials mentioning features or use of this software |
| 17 | * must display the following acknowledgement: |
| 18 | * This product includes software developed by the NetBSD |
| 19 | * Foundation, Inc. and its contributors. |
| 20 | * 4. Neither the name of The NetBSD Foundation nor the names of its |
| 21 | * contributors may be used to endorse or promote products derived |
| 22 | * from this software without specific prior written permission. |
| 23 | * |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 25 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 26 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 27 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 28 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 29 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 30 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 31 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 32 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 33 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 34 | * POSSIBILITY OF SUCH DAMAGE. |
| 35 | * |
| 36 | * Adapted for uClibc from NetBSD bcopy.S,v 1.2 1997/10/09 |
| 37 | * by Erik Andersen <andersen@codepoet.org> |
| 38 | */ |
| 39 | |
| 40 | /* bcopy = memcpy/memmove with arguments reversed. */ |
| 41 | |
| 42 | #include <features.h> |
| 43 | #include <bits/arm_asm.h> |
| 44 | |
| 45 | #ifdef __UCLIBC_SUSV3_LEGACY__ |
| 46 | |
| 47 | .text |
| 48 | .global bcopy |
| 49 | .type bcopy,%function |
| 50 | .align 4 |
| 51 | |
| 52 | #if defined(__thumb__) && !defined(__thumb2__) |
| 53 | .thumb_func |
| 54 | bcopy: |
| 55 | push {r2, lr} |
| 56 | mov ip, r0 |
| 57 | mov r0, r1 |
| 58 | mov r1, ip |
| 59 | bl _memcpy |
| 60 | POP_RET |
| 61 | #else |
| 62 | bcopy: |
| 63 | /* switch the source and destination registers */ |
| 64 | eor r0, r1, r0 |
| 65 | eor r1, r0, r1 |
| 66 | eor r0, r1, r0 |
| 67 | b _memcpy /* (PLT) */ |
| 68 | #endif |
| 69 | |
| 70 | .size bcopy,.-bcopy |
| 71 | |
| 72 | #endif |