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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
|
/* Assembly macros for RISC-V.
Copyright (C) 2011-2018
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/>. */
#ifndef _LINUX_RISCV_SYSDEP_H
#define _LINUX_RISCV_SYSDEP_H 1
#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
#include <tls.h>
#ifdef __ASSEMBLER__
# include <sys/asm.h>
# define ENTRY(name) LEAF(name)
# define L(label) .L ## label
/* Performs a system call, handling errors by setting errno. Linux indicates
errors by setting a0 to a value between -1 and -4095. */
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
.align 2; \
ENTRY (name); \
li a7, SYS_ify (syscall_name); \
scall; \
li a7, -4096; \
bgtu a0, a7, .Lsyscall_error ## name;
# undef PSEUDO_END
# define PSEUDO_END(sym) \
SYSCALL_ERROR_HANDLER (sym) \
ret; \
END (sym)
# if !IS_IN (libc)
# if RTLD_PRIVATE_ERRNO
# define SYSCALL_ERROR_HANDLER(name) \
.Lsyscall_error ## name: \
li t1, -4096; \
neg a0, a0; \
sw a0, rtld_errno, t1; \
li a0, -1;
# elif defined (__PIC__)
# define SYSCALL_ERROR_HANDLER(name) \
.Lsyscall_error ## name: \
la.tls.ie t1, errno; \
add t1, t1, tp; \
neg a0, a0; \
sw a0, 0(t1); \
li a0, -1;
# else
# define SYSCALL_ERROR_HANDLER(name) \
.Lsyscall_error ## name: \
lui t1, %tprel_hi(errno); \
add t1, t1, tp, %tprel_add(errno); \
neg a0, a0; \
sw a0, %tprel_lo(errno)(t1); \
li a0, -1;
# endif
# else
# define SYSCALL_ERROR_HANDLER(name) \
.Lsyscall_error ## name: \
j __syscall_error;
# endif
/* Performs a system call, not setting errno. */
# undef PSEUDO_NEORRNO
# define PSEUDO_NOERRNO(name, syscall_name, args) \
.align 2; \
ENTRY (name); \
li a7, SYS_ify (syscall_name); \
scall;
# undef PSEUDO_END_NOERRNO
# define PSEUDO_END_NOERRNO(name) \
END (name)
# undef ret_NOERRNO
# define ret_NOERRNO ret
/* Perfroms a system call, returning the error code. */
# undef PSEUDO_ERRVAL
# define PSEUDO_ERRVAL(name, syscall_name, args) \
PSEUDO_NOERRNO (name, syscall_name, args) \
neg a0, a0;
# undef PSEUDO_END_ERRVAL
# define PSEUDO_END_ERRVAL(name) \
END (name)
# undef ret_ERRVAL
# define ret_ERRVAL ret
#endif /* __ASSEMBLER__ */
/* In order to get __set_errno() definition in INLINE_SYSCALL. */
#ifndef __ASSEMBLER__
# include <errno.h>
#endif
#include <sysdeps/unix/sysdep.h>
#undef SYS_ify
#define SYS_ify(syscall_name) __NR_##syscall_name
#ifndef __ASSEMBLER__
/* List of system calls which are supported as vsyscalls. */
# define HAVE_CLOCK_GETRES_VSYSCALL 1
# define HAVE_CLOCK_GETTIME_VSYSCALL 1
# define HAVE_GETTIMEOFDAY_VSYSCALL 1
# define HAVE_GETCPU_VSYSCALL 1
/* Define a macro which expands into the inline wrapper code for a system
call. */
# undef INLINE_SYSCALL
# define INLINE_SYSCALL(name, nr, args...) \
({ INTERNAL_SYSCALL_DECL (err); \
long int __sys_result = INTERNAL_SYSCALL (name, err, nr, args); \
if (__glibc_unlikely (INTERNAL_SYSCALL_ERROR_P (__sys_result, ))) \
{ \
__set_errno (INTERNAL_SYSCALL_ERRNO (__sys_result, )); \
__sys_result = (unsigned long) -1; \
} \
__sys_result; })
# define INTERNAL_SYSCALL_DECL(err) do { } while (0)
# define INTERNAL_SYSCALL_ERROR_P(val, err) \
((unsigned long int) (val) > -4096UL)
# define INTERNAL_SYSCALL_ERRNO(val, err) (-val)
# define INTERNAL_SYSCALL(name, err, nr, args...) \
internal_syscall##nr (SYS_ify (name), err, args)
# define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \
internal_syscall##nr (number, err, args)
# define internal_syscall0(number, err, dummy...) \
({ \
long int _sys_result; \
\
{ \
register long int __a7 asm ("a7") = number; \
register long int __a0 asm ("a0"); \
__asm__ volatile ( \
"scall\n\t" \
: "=r" (__a0) \
: "r" (__a7) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
# define internal_syscall1(number, err, arg0) \
({ \
long int _sys_result; \
\
{ \
register long int __a7 asm ("a7") = number; \
register long int __a0 asm ("a0") = (long int) (arg0); \
__asm__ volatile ( \
"scall\n\t" \
: "+r" (__a0) \
: "r" (__a7) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
# define internal_syscall2(number, err, arg0, arg1) \
({ \
long int _sys_result; \
\
{ \
register long int __a7 asm ("a7") = number; \
register long int __a0 asm ("a0") = (long int) (arg0); \
register long int __a1 asm ("a1") = (long int) (arg1); \
__asm__ volatile ( \
"scall\n\t" \
: "+r" (__a0) \
: "r" (__a7), "r" (__a1) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
# define internal_syscall3(number, err, arg0, arg1, arg2) \
({ \
long int _sys_result; \
\
{ \
register long int __a7 asm ("a7") = number; \
register long int __a0 asm ("a0") = (long int) (arg0); \
register long int __a1 asm ("a1") = (long int) (arg1); \
register long int __a2 asm ("a2") = (long int) (arg2); \
__asm__ volatile ( \
"scall\n\t" \
: "+r" (__a0) \
: "r" (__a7), "r" (__a1), "r" (__a2) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
# define internal_syscall4(number, err, arg0, arg1, arg2, arg3) \
({ \
long int _sys_result; \
\
{ \
register long int __a7 asm ("a7") = number; \
register long int __a0 asm ("a0") = (long int) (arg0); \
register long int __a1 asm ("a1") = (long int) (arg1); \
register long int __a2 asm ("a2") = (long int) (arg2); \
register long int __a3 asm ("a3") = (long int) (arg3); \
__asm__ volatile ( \
"scall\n\t" \
: "+r" (__a0) \
: "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
# define internal_syscall5(number, err, arg0, arg1, arg2, arg3, arg4) \
({ \
long int _sys_result; \
\
{ \
register long int __a7 asm ("a7") = number; \
register long int __a0 asm ("a0") = (long int) (arg0); \
register long int __a1 asm ("a1") = (long int) (arg1); \
register long int __a2 asm ("a2") = (long int) (arg2); \
register long int __a3 asm ("a3") = (long int) (arg3); \
register long int __a4 asm ("a4") = (long int) (arg4); \
__asm__ volatile ( \
"scall\n\t" \
: "+r" (__a0) \
: "r" (__a7), "r"(__a1), "r"(__a2), "r"(__a3), "r" (__a4) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
# define internal_syscall6(number, err, arg0, arg1, arg2, arg3, arg4, arg5) \
({ \
long int _sys_result; \
\
{ \
register long int __a7 asm ("a7") = number; \
register long int __a0 asm ("a0") = (long int) (arg0); \
register long int __a1 asm ("a1") = (long int) (arg1); \
register long int __a2 asm ("a2") = (long int) (arg2); \
register long int __a3 asm ("a3") = (long int) (arg3); \
register long int __a4 asm ("a4") = (long int) (arg4); \
register long int __a5 asm ("a5") = (long int) (arg5); \
__asm__ volatile ( \
"scall\n\t" \
: "+r" (__a0) \
: "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3), \
"r" (__a4), "r" (__a5) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
# define internal_syscall7(number, err, arg0, arg1, arg2, arg3, arg4, arg5, arg6) \
({ \
long int _sys_result; \
\
{ \
register long int __a7 asm ("a7") = number; \
register long int __a0 asm ("a0") = (long int) (arg0); \
register long int __a1 asm ("a1") = (long int) (arg1); \
register long int __a2 asm ("a2") = (long int) (arg2); \
register long int __a3 asm ("a3") = (long int) (arg3); \
register long int __a4 asm ("a4") = (long int) (arg4); \
register long int __a5 asm ("a5") = (long int) (arg5); \
register long int __a6 asm ("a6") = (long int) (arg6); \
__asm__ volatile ( \
"scall\n\t" \
: "+r" (__a0) \
: "r" (__a7), "r" (__a1), "r" (__a2), "r" (__a3), \
"r" (__a4), "r" (__a5), "r" (__a6) \
: __SYSCALL_CLOBBERS); \
_sys_result = __a0; \
} \
_sys_result; \
})
# define __SYSCALL_CLOBBERS "memory"
extern long int __syscall_error (long int neg_errno);
#endif /* ! __ASSEMBLER__ */
/* Pointer mangling is not supported. */
#define PTR_MANGLE(var) (void) (var)
#define PTR_DEMANGLE(var) (void) (var)
#endif /* linux/riscv/sysdep.h */
|
