1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
| /* ----------------------------------------------------------------------- *
| *
| * Copyright (C) 1991, 1992 Linus Torvalds
| * Copyright 2007 rPath, Inc. - All Rights Reserved
| *
| * This file is part of the Linux kernel, and is made available under
| * the terms of the GNU General Public License version 2.
| *
| * ----------------------------------------------------------------------- */
|
| #include <linux/linkage.h>
|
| /*
| * Memory copy routines
| */
|
| .code16
| .text
|
| GLOBAL(memcpy)
| pushw %si
| pushw %di
| movw %ax, %di
| movw %dx, %si
| pushw %cx
| shrw $2, %cx
| rep; movsl
| popw %cx
| andw $3, %cx
| rep; movsb
| popw %di
| popw %si
| retl
| ENDPROC(memcpy)
|
| GLOBAL(memset)
| pushw %di
| movw %ax, %di
| movzbl %dl, %eax
| imull $0x01010101,%eax
| pushw %cx
| shrw $2, %cx
| rep; stosl
| popw %cx
| andw $3, %cx
| rep; stosb
| popw %di
| retl
| ENDPROC(memset)
|
| GLOBAL(copy_from_fs)
| pushw %ds
| pushw %fs
| popw %ds
| calll memcpy
| popw %ds
| retl
| ENDPROC(copy_from_fs)
|
| GLOBAL(copy_to_fs)
| pushw %es
| pushw %fs
| popw %es
| calll memcpy
| popw %es
| retl
| ENDPROC(copy_to_fs)
|
|
