ia64/linux-2.6.18-xen.hg

view arch/i386/lib/putuser.S @ 647:a5bb490065f6

Fix the build after public header sync.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
author Keir Fraser <keir.fraser@citrix.com>
date Wed Aug 13 14:01:49 2008 +0100 (2008-08-13)
parents 831230e53067
children
line source
1 /*
2 * __put_user functions.
3 *
4 * (C) Copyright 2005 Linus Torvalds
5 *
6 * These functions have a non-standard call interface
7 * to make them more efficient, especially as they
8 * return an error value in addition to the "real"
9 * return value.
10 */
11 #include <asm/thread_info.h>
14 /*
15 * __put_user_X
16 *
17 * Inputs: %eax[:%edx] contains the data
18 * %ecx contains the address
19 *
20 * Outputs: %eax is error code (0 or -EFAULT)
21 *
22 * These functions should not modify any other registers,
23 * as they get called from within inline assembly.
24 */
26 #define ENTER pushl %ebx ; GET_THREAD_INFO(%ebx)
27 #define EXIT popl %ebx ; ret
29 .text
30 .align 4
31 .globl __put_user_1
32 __put_user_1:
33 ENTER
34 cmpl TI_addr_limit(%ebx),%ecx
35 jae bad_put_user
36 1: movb %al,(%ecx)
37 xorl %eax,%eax
38 EXIT
40 .align 4
41 .globl __put_user_2
42 __put_user_2:
43 ENTER
44 movl TI_addr_limit(%ebx),%ebx
45 subl $1,%ebx
46 cmpl %ebx,%ecx
47 jae bad_put_user
48 2: movw %ax,(%ecx)
49 xorl %eax,%eax
50 EXIT
52 .align 4
53 .globl __put_user_4
54 __put_user_4:
55 ENTER
56 movl TI_addr_limit(%ebx),%ebx
57 subl $3,%ebx
58 cmpl %ebx,%ecx
59 jae bad_put_user
60 3: movl %eax,(%ecx)
61 xorl %eax,%eax
62 EXIT
64 .align 4
65 .globl __put_user_8
66 __put_user_8:
67 ENTER
68 movl TI_addr_limit(%ebx),%ebx
69 subl $7,%ebx
70 cmpl %ebx,%ecx
71 jae bad_put_user
72 4: movl %eax,(%ecx)
73 5: movl %edx,4(%ecx)
74 xorl %eax,%eax
75 EXIT
77 bad_put_user:
78 movl $-14,%eax
79 EXIT
81 .section __ex_table,"a"
82 .long 1b,bad_put_user
83 .long 2b,bad_put_user
84 .long 3b,bad_put_user
85 .long 4b,bad_put_user
86 .long 5b,bad_put_user
87 .previous