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
|
/* Copyright (C) 2009-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep-cancel.h>
#include <socketcall.h>
#define P(a, b) P2(a, b)
#define P2(a, b) a##b
/* The socket-oriented system calls are handled unusally in Linux.
They are all gated through the single `socketcall' system call number.
`socketcall' takes two arguments: the first is the subcode, specifying
which socket function is being called; and the second is a pointer to
the arguments to the specific function.
The .S files for the other calls just #define socket and #include this.
They also #define a 'number-of-arguments' word in NARGS, which
defaults to 3. */
#ifndef NARGS
# ifdef socket
# error NARGS not defined
# endif
# define NARGS 3
#endif
/* Stack usage:
0 - r15 (return address)
4 - 12 args to syscall
16 - scratch for cancellation state
20 - scratch for return value
*/
#define stackadjust 24
#ifndef __socket
# ifndef NO_WEAK_ALIAS
# define __socket P(__,socket)
# else
# define __socket socket
# endif
#endif
.text
ENTRY(__socket)
addik r1,r1,-stackadjust
swi r15,r1,0
#if NARGS >= 1
swi r5,r1,stackadjust+4
#endif
#if NARGS >= 2
swi r6,r1,stackadjust+8
#endif
#if NARGS >= 3
swi r7,r1,stackadjust+12
#endif
#if NARGS >= 4
swi r8,r1,stackadjust+16
#endif
#if NARGS >= 5
swi r9,r1,stackadjust+20
#endif
#if NARGS >= 6
swi r10,r1,stackadjust+24
#endif
/* The rest of the args (if any) are on the caller's stack already. */
#if defined NEED_CANCELLATION && defined CENABLE
SINGLE_THREAD_P(r12)
bnei r12,L(socket_cancel)
#endif
addik r12,r0,SYS_ify(socketcall)
addik r5,r0,P(SOCKOP_,socket)
addik r6,r1,stackadjust+4
brki r14,8
addk r0,r0,r0
lwi r15,r1,0
addik r1,r1,stackadjust
addik r4,r0,-4095
cmpu r4,r4,r3
bgei r4,SYSCALL_ERROR_LABEL
rtsd r15,8
addk r0,r0,r0
#if defined NEED_CANCELLATION && defined CENABLE
L(socket_cancel):
CENABLE
swi r3,r1,16
addik r12,r0,SYS_ify(socketcall)
addik r5,r0,P(SOCKOP_,socket)
addik r6,r1,stackadjust+4
brki r14,8
addk r0,r0,r0
swi r3,r1,20
lwi r5,r1,16
CDISABLE
lwi r3,r1,20
lwi r15,r1,0
addik r1,r1,stackadjust
addik r4,r0,-4095
cmpu r4,r4,r3
bgei r4,SYSCALL_ERROR_LABEL
rtsd r15,8
addk r0,r0,r0
#endif
PSEUDO_END (__socket)
#ifndef NO_WEAK_ALIAS
weak_alias (__socket, socket)
#endif
|
