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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/* Copyright (C) 1991-2024 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
<https://www.gnu.org/licenses/>. */
#include <sysdeps/generic/sysdep.h>
#include <single-thread.h>
#include <sys/syscall.h>
#define HAVE_SYSCALLS
/* Note that using a `PASTE' macro loses. */
#define SYSCALL__(name, args) PSEUDO (__##name, name, args)
#define SYSCALL(name, args) PSEUDO (name, name, args)
#define __SYSCALL_CONCAT_X(a,b) a##b
#define __SYSCALL_CONCAT(a,b) __SYSCALL_CONCAT_X (a, b)
#define __INTERNAL_SYSCALL0(name) \
INTERNAL_SYSCALL (name, 0)
#define __INTERNAL_SYSCALL1(name, a1) \
INTERNAL_SYSCALL (name, 1, a1)
#define __INTERNAL_SYSCALL2(name, a1, a2) \
INTERNAL_SYSCALL (name, 2, a1, a2)
#define __INTERNAL_SYSCALL3(name, a1, a2, a3) \
INTERNAL_SYSCALL (name, 3, a1, a2, a3)
#define __INTERNAL_SYSCALL4(name, a1, a2, a3, a4) \
INTERNAL_SYSCALL (name, 4, a1, a2, a3, a4)
#define __INTERNAL_SYSCALL5(name, a1, a2, a3, a4, a5) \
INTERNAL_SYSCALL (name, 5, a1, a2, a3, a4, a5)
#define __INTERNAL_SYSCALL6(name, a1, a2, a3, a4, a5, a6) \
INTERNAL_SYSCALL (name, 6, a1, a2, a3, a4, a5, a6)
#define __INTERNAL_SYSCALL7(name, a1, a2, a3, a4, a5, a6, a7) \
INTERNAL_SYSCALL (name, 7, a1, a2, a3, a4, a5, a6, a7)
#define __INTERNAL_SYSCALL_NARGS_X(a,b,c,d,e,f,g,h,n,...) n
#define __INTERNAL_SYSCALL_NARGS(...) \
__INTERNAL_SYSCALL_NARGS_X (__VA_ARGS__,7,6,5,4,3,2,1,0,)
#define __INTERNAL_SYSCALL_DISP(b,...) \
__SYSCALL_CONCAT (b,__INTERNAL_SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)
/* Issue a syscall defined by syscall number plus any other argument required.
It is similar to INTERNAL_SYSCALL macro, but without the need to pass the
expected argument number as second parameter. */
#define INTERNAL_SYSCALL_CALL(...) \
__INTERNAL_SYSCALL_DISP (__INTERNAL_SYSCALL, __VA_ARGS__)
#define __INTERNAL_SYSCALL_NCS0(name) \
INTERNAL_SYSCALL_NCS (name, 0)
#define __INTERNAL_SYSCALL_NCS1(name, a1) \
INTERNAL_SYSCALL_NCS (name, 1, a1)
#define __INTERNAL_SYSCALL_NCS2(name, a1, a2) \
INTERNAL_SYSCALL_NCS (name, 2, a1, a2)
#define __INTERNAL_SYSCALL_NCS3(name, a1, a2, a3) \
INTERNAL_SYSCALL_NCS (name, 3, a1, a2, a3)
#define __INTERNAL_SYSCALL_NCS4(name, a1, a2, a3, a4) \
INTERNAL_SYSCALL_NCS (name, 4, a1, a2, a3, a4)
#define __INTERNAL_SYSCALL_NCS5(name, a1, a2, a3, a4, a5) \
INTERNAL_SYSCALL_NCS (name, 5, a1, a2, a3, a4, a5)
#define __INTERNAL_SYSCALL_NCS6(name, a1, a2, a3, a4, a5, a6) \
INTERNAL_SYSCALL_NCS (name, 6, a1, a2, a3, a4, a5, a6)
#define __INTERNAL_SYSCALL_NCS7(name, a1, a2, a3, a4, a5, a6, a7) \
INTERNAL_SYSCALL_NCS (name, 7, a1, a2, a3, a4, a5, a6, a7)
#define INTERNAL_SYSCALL_NCS_CALL(...) \
__INTERNAL_SYSCALL_DISP (__INTERNAL_SYSCALL_NCS, __VA_ARGS__)
#define __INLINE_SYSCALL0(name) \
INLINE_SYSCALL (name, 0)
#define __INLINE_SYSCALL1(name, a1) \
INLINE_SYSCALL (name, 1, a1)
#define __INLINE_SYSCALL2(name, a1, a2) \
INLINE_SYSCALL (name, 2, a1, a2)
#define __INLINE_SYSCALL3(name, a1, a2, a3) \
INLINE_SYSCALL (name, 3, a1, a2, a3)
#define __INLINE_SYSCALL4(name, a1, a2, a3, a4) \
INLINE_SYSCALL (name, 4, a1, a2, a3, a4)
#define __INLINE_SYSCALL5(name, a1, a2, a3, a4, a5) \
INLINE_SYSCALL (name, 5, a1, a2, a3, a4, a5)
#define __INLINE_SYSCALL6(name, a1, a2, a3, a4, a5, a6) \
INLINE_SYSCALL (name, 6, a1, a2, a3, a4, a5, a6)
#define __INLINE_SYSCALL7(name, a1, a2, a3, a4, a5, a6, a7) \
INLINE_SYSCALL (name, 7, a1, a2, a3, a4, a5, a6, a7)
#define __INLINE_SYSCALL_NARGS_X(a,b,c,d,e,f,g,h,n,...) n
#define __INLINE_SYSCALL_NARGS(...) \
__INLINE_SYSCALL_NARGS_X (__VA_ARGS__,7,6,5,4,3,2,1,0,)
#define __INLINE_SYSCALL_DISP(b,...) \
__SYSCALL_CONCAT (b,__INLINE_SYSCALL_NARGS(__VA_ARGS__))(__VA_ARGS__)
/* Issue a syscall defined by syscall number plus any other argument
required. Any error will be handled using arch defined macros and errno
will be set accordingly.
It is similar to INLINE_SYSCALL macro, but without the need to pass the
expected argument number as second parameter. */
#define INLINE_SYSCALL_CALL(...) \
__INLINE_SYSCALL_DISP (__INLINE_SYSCALL, __VA_ARGS__)
#if IS_IN (rtld)
/* All cancellation points are compiled out in the dynamic loader. */
# define NO_SYSCALL_CANCEL_CHECKING 1
#else
# define NO_SYSCALL_CANCEL_CHECKING SINGLE_THREAD_P
#endif
#define SYSCALL_CANCEL(...) \
({ \
long int sc_ret; \
if (NO_SYSCALL_CANCEL_CHECKING) \
sc_ret = INLINE_SYSCALL_CALL (__VA_ARGS__); \
else \
{ \
int sc_cancel_oldtype = LIBC_CANCEL_ASYNC (); \
sc_ret = INLINE_SYSCALL_CALL (__VA_ARGS__); \
LIBC_CANCEL_RESET (sc_cancel_oldtype); \
} \
sc_ret; \
})
/* Issue a syscall defined by syscall number plus any other argument
required. Any error will be returned unmodified (including errno). */
#define INTERNAL_SYSCALL_CANCEL(...) \
({ \
long int sc_ret; \
if (NO_SYSCALL_CANCEL_CHECKING) \
sc_ret = INTERNAL_SYSCALL_CALL (__VA_ARGS__); \
else \
{ \
int sc_cancel_oldtype = LIBC_CANCEL_ASYNC (); \
sc_ret = INTERNAL_SYSCALL_CALL (__VA_ARGS__); \
LIBC_CANCEL_RESET (sc_cancel_oldtype); \
} \
sc_ret; \
})
/* Machine-dependent sysdep.h files are expected to define the macro
PSEUDO (function_name, syscall_name) to emit assembly code to define the
C-callable function FUNCTION_NAME to do system call SYSCALL_NAME.
r0 and r1 are the system call outputs. MOVE(x, y) should be defined as
an instruction such that "MOVE(r1, r0)" works. ret should be defined
as the return instruction. */
#ifndef SYS_ify
#define SYS_ify(syscall_name) SYS_##syscall_name
#endif
/* Terminate a system call named SYM. This is used on some platforms
to generate correct debugging information. */
#ifndef PSEUDO_END
#define PSEUDO_END(sym)
#endif
#ifndef PSEUDO_END_NOERRNO
#define PSEUDO_END_NOERRNO(sym) PSEUDO_END(sym)
#endif
#ifndef PSEUDO_END_ERRVAL
#define PSEUDO_END_ERRVAL(sym) PSEUDO_END(sym)
#endif
/* Wrappers around system calls should normally inline the system call code.
But sometimes it is not possible or implemented and we use this code. */
#ifndef INLINE_SYSCALL
#define INLINE_SYSCALL(name, nr, args...) __syscall_##name (args)
#endif
|
