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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
#ifndef _BITS_SYSCALLS_H
#define _BITS_SYSCALLS_H
#ifndef _SYSCALL_H
# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
#endif
#ifndef __ASSEMBLER__
#include <errno.h>
#define SYS_ify(syscall_name) (__NR_##syscall_name)
/* user-visible error numbers are in the range -1 - -4095: see <asm-frv/errno.h> */
#if defined _LIBC && !defined __set_errno
# define __syscall_return(type, res) \
do { \
unsigned long __sr2 = (res); \
if (__builtin_expect ((unsigned long)(__sr2) \
>= (unsigned long)(-4095), 0)) { \
extern int __syscall_error (int); \
return (type) __syscall_error (__sr2); \
} \
return (type) (__sr2); \
} while (0)
#else
# define __syscall_return(type, res) \
do { \
unsigned long __sr2 = (res); \
if (__builtin_expect ((unsigned long)(__sr2) \
>= (unsigned long)(-4095), 0)) { \
__set_errno (-__sr2); \
__sr2 = -1; \
} \
return (type) (__sr2); \
} while (0)
#endif
#define _syscall0(type,name) \
type name(void) { \
long __res; \
__asm__ __volatile__ ( \
"excpt 0;\n\t" \
: "=q0" (__res) \
: "qA" (__NR_##name) \
: "memory","CC"); \
__syscall_return(type,__res); \
}
#define _syscall1(type,name,type1,arg1) \
type name(type1 arg1) { \
long __res; \
__asm__ __volatile__ ( \
"excpt 0;\n\t" \
: "=q0" (__res) \
: "qA" (__NR_##name), \
"q0" ((long)(arg1)) \
: "memory","CC"); \
__syscall_return(type,__res); \
}
#define _syscall2(type,name,type1,arg1,type2,arg2) \
type name(type1 arg1,type2 arg2) { \
long __res; \
__asm__ __volatile__ ( \
"excpt 0;\n\t" \
"%0=r0;\n\t" \
: "=q0" (__res) \
: "qA" (__NR_##name), \
"q0" ((long)(arg1)), \
"q1" ((long)(arg2)) \
: "memory","CC"); \
__syscall_return(type,__res); \
}
#define _syscall3(type,name,type1,arg1,type2,arg2,type3,arg3) \
type name(type1 arg1,type2 arg2,type3 arg3) { \
long __res; \
__asm__ __volatile__ ( \
"excpt 0;\n\t" \
: "=q0" (__res) \
: "qA" (__NR_##name), \
"q0" ((long)(arg1)), \
"q1" ((long)(arg2)), \
"q2" ((long)(arg3)) \
: "memory","CC"); \
__syscall_return(type,__res); \
}
#define _syscall4(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4)\
type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4) { \
long __res; \
__asm__ __volatile__ ( \
"excpt 0;\n\t" \
: "=q0" (__res) \
: "qA" (__NR_##name), \
"q0" ((long)(arg1)), \
"q1" ((long)(arg2)), \
"q2" ((long)(arg3)), \
"q3" ((long)(arg4)) \
: "memory","CC"); \
__syscall_return(type,__res); \
}
#define _syscall5(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5) \
type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5) { \
long __res; \
__asm__ __volatile__ ( \
"excpt 0;\n\t" \
: "=q0" (__res) \
: "qA" (__NR_##name), \
"q0" ((long)(arg1)), \
"q1" ((long)(arg2)), \
"q2" ((long)(arg3)), \
"q3" ((long)(arg4)), \
"q4" ((long)(arg5)) \
: "memory","CC"); \
__syscall_return(type,__res); \
}
#define _syscall6(type,name,type1,arg1,type2,arg2,type3,arg3,type4,arg4,type5,arg5,type6,arg6) \
type name(type1 arg1, type2 arg2, type3 arg3, type4 arg4, type5 arg5, type6 arg6) { \
long __res; \
__asm__ __volatile__ ( \
"excpt 0;\n\t" \
: "=q0" (__res) \
: "qA" (__NR_##name), \
"q0" ((long)(arg1)), \
"q1" ((long)(arg2)), \
"q2" ((long)(arg3)), \
"q3" ((long)(arg4)), \
"q4" ((long)(arg5)), \
"q5" ((long)(arg6)) \
: "memory","CC"); \
__syscall_return(type,__res); \
}
/* Define a macro which expands into the inline wrapper code for a system call */
#define INLINE_SYSCALL(name, nr, args...) \
({ \
INTERNAL_SYSCALL_DECL(err); \
long result_var = INTERNAL_SYSCALL(name, err, nr, args); \
if (INTERNAL_SYSCALL_ERROR_P(result_var, err)) { \
__set_errno(INTERNAL_SYSCALL_ERRNO(result_var, err)); \
result_var = -1L; \
} \
result_var; \
})
#define INTERNAL_SYSCALL_DECL(err) do { } while (0)
#define INTERNAL_SYSCALL_ERROR_P(val, err) ((unsigned long)val >= (unsigned long)(-4095))
#define INTERNAL_SYSCALL_ERRNO(val, err) (-(val))
#define INTERNAL_SYSCALL(name, err, nr, args...) \
({ \
long __res; \
__asm__ __volatile__ ( \
"excpt 0;\n\t" \
: "=q0" (__res) \
: "qA" (__NR_##name) ASMFMT_##nr(args) \
: "memory","CC"); \
__res; \
})
#define ASMFMT_0()
#define ASMFMT_1(arg1) \
, "q0" ((long)(arg1))
#define ASMFMT_2(arg1, arg2) \
ASMFMT_1(arg1) \
, "q1" ((long)(arg2))
#define ASMFMT_3(arg1, arg2, arg3) \
ASMFMT_2(arg1, arg2) \
, "q2" ((long)(arg3))
#define ASMFMT_4(arg1, arg2, arg3, arg4) \
ASMFMT_3(arg1, arg2, arg3) \
, "q3" ((long)(arg4))
#define ASMFMT_5(arg1, arg2, arg3, arg4, arg5) \
ASMFMT_4(arg1, arg2, arg3, arg4) \
, "q4" ((long)(arg5))
#define ASMFMT_6(arg1, arg2, arg3, arg4, arg5, arg6) \
ASMFMT_5(arg1, arg2, arg3, arg4, arg5) \
, "q5" ((long)(arg6))
#endif /* __ASSEMBLER__ */
#endif /* _BITS_SYSCALLS_H */
|
