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
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*
* Compat system call wrappers
*
* Copyright (C) 2012 ARM Ltd.
* Authors: Will Deacon <will.deacon@arm.com>
* Catalin Marinas <catalin.marinas@arm.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <linux/linkage.h>
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
/*
* System call wrappers for the AArch32 compatibility layer.
*/
compat_sys_fork_wrapper:
mov x0, sp
b compat_sys_fork
ENDPROC(compat_sys_fork_wrapper)
compat_sys_vfork_wrapper:
mov x0, sp
b compat_sys_vfork
ENDPROC(compat_sys_vfork_wrapper)
compat_sys_clone_wrapper:
mov x5, sp
b compat_sys_clone
ENDPROC(compat_sys_clone_wrapper)
compat_sys_sigreturn_wrapper:
mov x0, sp
mov x27, #0 // prevent syscall restart handling (why)
b compat_sys_sigreturn
ENDPROC(compat_sys_sigreturn_wrapper)
compat_sys_rt_sigreturn_wrapper:
mov x0, sp
mov x27, #0 // prevent syscall restart handling (why)
b compat_sys_rt_sigreturn
ENDPROC(compat_sys_rt_sigreturn_wrapper)
compat_sys_sigaltstack_wrapper:
ldr x2, [sp, #S_COMPAT_SP]
b compat_do_sigaltstack
ENDPROC(compat_sys_sigaltstack_wrapper)
compat_sys_statfs64_wrapper:
mov w3, #84
cmp w1, #88
csel w1, w3, w1, eq
b compat_sys_statfs64
ENDPROC(compat_sys_statfs64_wrapper)
compat_sys_fstatfs64_wrapper:
mov w3, #84
cmp w1, #88
csel w1, w3, w1, eq
b compat_sys_fstatfs64
ENDPROC(compat_sys_fstatfs64_wrapper)
/*
* Wrappers for AArch32 syscalls that either take 64-bit parameters
* in registers or that take 32-bit parameters which require sign
* extension.
*/
compat_sys_lseek_wrapper:
sxtw x1, w1
b sys_lseek
ENDPROC(compat_sys_lseek_wrapper)
compat_sys_pread64_wrapper:
orr x3, x4, x5, lsl #32
b sys_pread64
ENDPROC(compat_sys_pread64_wrapper)
compat_sys_pwrite64_wrapper:
orr x3, x4, x5, lsl #32
b sys_pwrite64
ENDPROC(compat_sys_pwrite64_wrapper)
compat_sys_truncate64_wrapper:
orr x1, x2, x3, lsl #32
b sys_truncate
ENDPROC(compat_sys_truncate64_wrapper)
compat_sys_ftruncate64_wrapper:
orr x1, x2, x3, lsl #32
b sys_ftruncate
ENDPROC(compat_sys_ftruncate64_wrapper)
compat_sys_readahead_wrapper:
orr x1, x2, x3, lsl #32
mov w2, w4
b sys_readahead
ENDPROC(compat_sys_readahead_wrapper)
compat_sys_lookup_dcookie:
orr x0, x0, x1, lsl #32
mov w1, w2
mov w2, w3
b sys_lookup_dcookie
ENDPROC(compat_sys_lookup_dcookie)
compat_sys_fadvise64_64_wrapper:
mov w6, w1
orr x1, x2, x3, lsl #32
orr x2, x4, x5, lsl #32
mov w3, w6
b sys_fadvise64_64
ENDPROC(compat_sys_fadvise64_64_wrapper)
compat_sys_sync_file_range2_wrapper:
orr x2, x2, x3, lsl #32
orr x3, x4, x5, lsl #32
b sys_sync_file_range2
ENDPROC(compat_sys_sync_file_range2_wrapper)
compat_sys_fallocate_wrapper:
orr x2, x2, x3, lsl #32
orr x3, x4, x5, lsl #32
b sys_fallocate
ENDPROC(compat_sys_fallocate_wrapper)
compat_sys_fanotify_mark_wrapper:
orr x2, x2, x3, lsl #32
mov w3, w4
mov w4, w5
b sys_fanotify_mark
ENDPROC(compat_sys_fanotify_mark_wrapper)
#undef __SYSCALL
#define __SYSCALL(x, y) .quad y // x
/*
* The system calls table must be 4KB aligned.
*/
.align 12
ENTRY(compat_sys_call_table)
#include <asm/unistd32.h>
|
