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
|
/* Copyright (C) 2011-2016 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011.
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 <asm/unistd.h>
#include <sysdeps/tile/sysdep.h>
#include <sysdeps/unix/sysv/linux/generic/sysdep.h>
#include <sys/syscall.h>
#undef SYS_ify
#define SYS_ify(syscall_name) __NR_##syscall_name
#ifdef __ASSEMBLER__
/* The actual implementation of doing a syscall. */
#define DO_CALL(syscall_name, args) \
moveli TREG_SYSCALL_NR_NAME, SYS_ify(syscall_name); \
swint1
/* TILE Linux returns the result in r0 (or a negative errno).
The kernel "owns" the code to decide if a given value is an error,
and puts errno in r1 if so, or otherwise zero. */
#define PSEUDO(name, syscall_name, args) \
ENTRY (name); \
DO_CALL(syscall_name, args); \
BNEZ r1, 0f
#define ret jrp lr
#ifndef PIC
/* For static code, on error jump to __syscall_error directly. */
# define SYSCALL_ERROR_NAME __syscall_error
#elif IS_IN (libc) || IS_IN (libpthread)
/* Use the internal name for libc/libpthread shared objects. */
# define SYSCALL_ERROR_NAME __GI___syscall_error
#else
/* Otherwise, on error do a full PLT jump. */
# define SYSCALL_ERROR_NAME plt(__syscall_error)
#endif
#undef PSEUDO_END
#define PSEUDO_END(name) \
0: \
j SYSCALL_ERROR_NAME; \
END (name)
#undef PSEUDO_NOERRNO
#define PSEUDO_NOERRNO(name, syscall_name, args) \
ENTRY (name); \
DO_CALL(syscall_name, args)
#define ret_NOERRNO jrp lr
#undef PSEUDO_END_NOERRNO
#define PSEUDO_END_NOERRNO(name) \
END (name)
/* Convenience wrappers. */
#define SYSCALL__(name, args) PSEUDO (__##name, name, args)
#define SYSCALL(name, args) PSEUDO (name, name, args)
#else /* not __ASSEMBLER__ */
#include <errno.h>
/* Define a macro which expands inline into the wrapper code for a system
call. */
# undef INLINE_SYSCALL
# define INLINE_SYSCALL(name, nr, args...) \
({ \
INTERNAL_SYSCALL_DECL (_sc_err); \
unsigned long _sc_val = INTERNAL_SYSCALL (name, _sc_err, nr, args); \
if (__builtin_expect (INTERNAL_SYSCALL_ERROR_P (_sc_val, _sc_err), 0)) \
{ \
__set_errno (INTERNAL_SYSCALL_ERRNO (_sc_val, _sc_err)); \
_sc_val = -1; \
} \
(long) _sc_val; \
})
#undef INTERNAL_SYSCALL
#define INTERNAL_SYSCALL(name, err, nr, args...) \
internal_syscall##nr (SYS_ify (name), err, args)
#undef INTERNAL_SYSCALL_NCS
#define INTERNAL_SYSCALL_NCS(number, err, nr, args...) \
internal_syscall##nr (number, err, args)
#undef INTERNAL_SYSCALL_DECL
#define INTERNAL_SYSCALL_DECL(err) int err
#undef INTERNAL_SYSCALL_ERROR_P
#define INTERNAL_SYSCALL_ERROR_P(val, err) ({ (void) (val); (err) != 0; })
#undef INTERNAL_SYSCALL_ERRNO
#define INTERNAL_SYSCALL_ERRNO(val, err) ({ (void) (val); (err); })
#define internal_syscall0(num, err, dummy...) \
({ \
long _sys_result, __SYSCALL_CLOBBER_DECLS; \
__asm__ __volatile__ ( \
"swint1" \
: "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
: "R10" (num) \
: __SYSCALL_CLOBBERS); \
_sys_result; \
})
#define internal_syscall1(num, err, arg0) \
({ \
long _sys_result, __SYSCALL_CLOBBER_DECLS; \
__asm__ __volatile__ ( \
"swint1" \
: "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
: "R10" (num), "R00" (arg0) \
: __SYSCALL_CLOBBERS); \
_sys_result; \
})
#define internal_syscall2(num, err, arg0, arg1) \
({ \
long _sys_result, __SYSCALL_CLOBBER_DECLS; \
__asm__ __volatile__ ( \
"swint1" \
: "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
: "R10" (num), "R00" (arg0), "R01" (arg1) \
: __SYSCALL_CLOBBERS); \
_sys_result; \
})
#define internal_syscall3(num, err, arg0, arg1, arg2) \
({ \
long _sys_result, __SYSCALL_CLOBBER_DECLS; \
__asm__ __volatile__ ( \
"swint1" \
: "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
: "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2) \
: __SYSCALL_CLOBBERS); \
_sys_result; \
})
#define internal_syscall4(num, err, arg0, arg1, arg2, arg3) \
({ \
long _sys_result, __SYSCALL_CLOBBER_DECLS; \
__asm__ __volatile__ ( \
"swint1" \
: "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
: "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2), \
"R03" (arg3) \
: __SYSCALL_CLOBBERS); \
_sys_result; \
})
#define internal_syscall5(num, err, arg0, arg1, arg2, arg3, arg4) \
({ \
long _sys_result, __SYSCALL_CLOBBER_DECLS; \
__asm__ __volatile__ ( \
"swint1" \
: "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
: "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2), \
"R03" (arg3), "R04" (arg4) \
: __SYSCALL_CLOBBERS); \
_sys_result; \
})
#define internal_syscall6(num, err, arg0, arg1, arg2, arg3, arg4, arg5) \
({ \
long _sys_result, __SYSCALL_CLOBBER_DECLS; \
__asm__ __volatile__ ( \
"swint1" \
: "=R00" (_sys_result), "=R01" (err), __SYSCALL_CLOBBER_OUTPUTS \
: "R10" (num), "R00" (arg0), "R01" (arg1), "R02" (arg2), \
"R03" (arg3), "R04" (arg4), "R05" (arg5) \
: __SYSCALL_CLOBBERS); \
_sys_result; \
})
#undef __SYSCALL_CLOBBERS
#define __SYSCALL_CLOBBERS \
"r6", "r7", \
"r8", "r9", "r11", "r12", "r13", "r14", "r15", \
"r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23", \
"r24", "r25", "r26", "r27", "r28", "r29", "memory"
/* gcc doesn't seem to allow an input operand to be clobbered, so we
fake it with dummy outputs. */
#define __SYSCALL_CLOBBER_DECLS \
_clobber_r2, _clobber_r3, _clobber_r4, _clobber_r5, _clobber_r10
#define __SYSCALL_CLOBBER_OUTPUTS \
"=R02" (_clobber_r2), "=R03" (_clobber_r3), "=R04" (_clobber_r4), \
"=R05" (_clobber_r5), "=R10" (_clobber_r10)
#define INTERNAL_VSYSCALL_CALL(funcptr, err, nr, args...) \
({ \
struct syscall_return_value _sc_rv = funcptr (args); \
err = _sc_rv.error; \
_sc_rv.value; \
})
/* List of system calls which are supported as vsyscalls. */
#define HAVE_CLOCK_GETTIME_VSYSCALL 1
#define HAVE_GETTIMEOFDAY_VSYSCALL 1
#endif /* __ASSEMBLER__ */
/* Pointer mangling support. */
#if IS_IN (rtld)
/* We cannot use the thread descriptor because in ld.so we use setjmp
earlier than the descriptor is initialized. */
#else
# ifdef __ASSEMBLER__
# define PTR_MANGLE(reg, tmpreg) \
ADDLI_PTR tmpreg, pt, POINTER_GUARD; \
LD tmpreg, tmpreg; \
xor reg, tmpreg, reg
# define PTR_DEMANGLE(reg, tmpreg) PTR_MANGLE (reg, tmpreg)
# else
# define PTR_MANGLE(var) \
(var) = (__typeof (var)) ((uintptr_t) (var) ^ THREAD_GET_POINTER_GUARD ())
# define PTR_DEMANGLE(var) PTR_MANGLE (var)
# endif
#endif
|
