diff options
Diffstat (limited to 'arch/x86/lib/putuser_64.S')
-rw-r--r-- | arch/x86/lib/putuser_64.S | 106 |
1 files changed, 0 insertions, 106 deletions
diff --git a/arch/x86/lib/putuser_64.S b/arch/x86/lib/putuser_64.S deleted file mode 100644 index 4989f5a8fa9b..000000000000 --- a/arch/x86/lib/putuser_64.S +++ /dev/null | |||
@@ -1,106 +0,0 @@ | |||
1 | /* | ||
2 | * __put_user functions. | ||
3 | * | ||
4 | * (C) Copyright 1998 Linus Torvalds | ||
5 | * (C) Copyright 2005 Andi Kleen | ||
6 | * | ||
7 | * These functions have a non-standard call interface | ||
8 | * to make them more efficient, especially as they | ||
9 | * return an error value in addition to the "real" | ||
10 | * return value. | ||
11 | */ | ||
12 | |||
13 | /* | ||
14 | * __put_user_X | ||
15 | * | ||
16 | * Inputs: %rcx contains the address | ||
17 | * %rdx contains new value | ||
18 | * | ||
19 | * Outputs: %rax is error code (0 or -EFAULT) | ||
20 | * | ||
21 | * %r8 is destroyed. | ||
22 | * | ||
23 | * These functions should not modify any other registers, | ||
24 | * as they get called from within inline assembly. | ||
25 | */ | ||
26 | |||
27 | #include <linux/linkage.h> | ||
28 | #include <asm/dwarf2.h> | ||
29 | #include <asm/page.h> | ||
30 | #include <asm/errno.h> | ||
31 | #include <asm/asm-offsets.h> | ||
32 | #include <asm/thread_info.h> | ||
33 | |||
34 | .text | ||
35 | ENTRY(__put_user_1) | ||
36 | CFI_STARTPROC | ||
37 | GET_THREAD_INFO(%r8) | ||
38 | cmpq threadinfo_addr_limit(%r8),%rcx | ||
39 | jae bad_put_user | ||
40 | 1: movb %dl,(%rcx) | ||
41 | xorl %eax,%eax | ||
42 | ret | ||
43 | CFI_ENDPROC | ||
44 | ENDPROC(__put_user_1) | ||
45 | |||
46 | ENTRY(__put_user_2) | ||
47 | CFI_STARTPROC | ||
48 | GET_THREAD_INFO(%r8) | ||
49 | addq $1,%rcx | ||
50 | jc 20f | ||
51 | cmpq threadinfo_addr_limit(%r8),%rcx | ||
52 | jae 20f | ||
53 | decq %rcx | ||
54 | 2: movw %dx,(%rcx) | ||
55 | xorl %eax,%eax | ||
56 | ret | ||
57 | 20: decq %rcx | ||
58 | jmp bad_put_user | ||
59 | CFI_ENDPROC | ||
60 | ENDPROC(__put_user_2) | ||
61 | |||
62 | ENTRY(__put_user_4) | ||
63 | CFI_STARTPROC | ||
64 | GET_THREAD_INFO(%r8) | ||
65 | addq $3,%rcx | ||
66 | jc 30f | ||
67 | cmpq threadinfo_addr_limit(%r8),%rcx | ||
68 | jae 30f | ||
69 | subq $3,%rcx | ||
70 | 3: movl %edx,(%rcx) | ||
71 | xorl %eax,%eax | ||
72 | ret | ||
73 | 30: subq $3,%rcx | ||
74 | jmp bad_put_user | ||
75 | CFI_ENDPROC | ||
76 | ENDPROC(__put_user_4) | ||
77 | |||
78 | ENTRY(__put_user_8) | ||
79 | CFI_STARTPROC | ||
80 | GET_THREAD_INFO(%r8) | ||
81 | addq $7,%rcx | ||
82 | jc 40f | ||
83 | cmpq threadinfo_addr_limit(%r8),%rcx | ||
84 | jae 40f | ||
85 | subq $7,%rcx | ||
86 | 4: movq %rdx,(%rcx) | ||
87 | xorl %eax,%eax | ||
88 | ret | ||
89 | 40: subq $7,%rcx | ||
90 | jmp bad_put_user | ||
91 | CFI_ENDPROC | ||
92 | ENDPROC(__put_user_8) | ||
93 | |||
94 | bad_put_user: | ||
95 | CFI_STARTPROC | ||
96 | movq $(-EFAULT),%rax | ||
97 | ret | ||
98 | CFI_ENDPROC | ||
99 | END(bad_put_user) | ||
100 | |||
101 | .section __ex_table,"a" | ||
102 | .quad 1b,bad_put_user | ||
103 | .quad 2b,bad_put_user | ||
104 | .quad 3b,bad_put_user | ||
105 | .quad 4b,bad_put_user | ||
106 | .previous | ||