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
|
/* Copyright (C) 2003 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#include <tls.h>
/* #include <pt-machine.h> */
#ifndef __ASSEMBLER__
# include <pthreadP.h>
#endif
#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
#if defined(__XTENSA_WINDOWED_ABI__)
/* CENABLE/CDISABLE in PSEUDO below use call8, stack frame size must be
* at least 32.
*/
#if FRAMESIZE < 32
#undef FRAMESIZE
#define FRAMESIZE 32
#endif
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
SINGLE_THREAD_P(a15); \
bnez a15, .Lpseudo_cancel; \
DO_CALL (syscall_name, args); \
bgez a2, .Lpseudo_done; \
movi a4, -4095; \
blt a2, a4, .Lpseudo_done; \
j SYSCALL_ERROR_LABEL; \
.Lpseudo_done: \
retw; \
.Lpseudo_cancel: \
/* The syscall args are in a2...a7; no need to save */ \
CENABLE; \
/* The return value is in a10 and preserved across the syscall */ \
DO_CALL (syscall_name, args); \
CDISABLE; \
bgez a2, .Lpseudo_end; \
movi a4, -4095; \
blt a2, a4, .Lpseudo_end; \
j SYSCALL_ERROR_LABEL; \
.Lpseudo_end:
# define CENABLE movi a8, CENABLE_FUNC; \
callx8 a8
# define CDISABLE movi a8, CDISABLE_FUNC; \
callx8 a8
#elif defined(__XTENSA_CALL0_ABI__)
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
SINGLE_THREAD_P(a10); \
bnez a10, .Lpseudo_cancel; \
DO_CALL (syscall_name, args); \
bgez a2, .Lpseudo_done; \
movi a4, -4095; \
blt a2, a4, .Lpseudo_done; \
j SYSCALL_ERROR_LABEL; \
.Lpseudo_done: \
ret; \
.Lpseudo_cancel: \
addi a1, a1, -32; \
/* The syscall args are in a2...a7; save them */ \
s32i a0, a1, 0; \
s32i a2, a1, 4; \
s32i a3, a1, 8; \
s32i a4, a1, 12; \
s32i a5, a1, 16; \
s32i a6, a1, 20; \
s32i a7, a1, 24; \
CENABLE; \
/* Move return value to a10 preserved across the syscall */ \
mov a10, a2; \
l32i a2, a1, 4; \
l32i a3, a1, 8; \
l32i a4, a1, 12; \
l32i a5, a1, 16; \
l32i a6, a1, 20; \
l32i a7, a1, 24; \
DO_CALL (syscall_name, args); \
s32i a2, a1, 4; \
mov a2, a10; \
CDISABLE; \
l32i a2, a1, 4; \
l32i a0, a1, 0; \
addi a1, a1, 32; \
bgez a2, .Lpseudo_end; \
movi a4, -4095; \
blt a2, a4, .Lpseudo_end; \
j SYSCALL_ERROR_LABEL; \
.Lpseudo_end:
# define CENABLE movi a0, CENABLE_FUNC; \
callx0 a0
# define CDISABLE movi a0, CDISABLE_FUNC; \
callx0 a0
#else
#error Unsupported Xtensa ABI
#endif
# ifdef IS_IN_libpthread
# define CENABLE_FUNC __pthread_enable_asynccancel
# define CDISABLE_FUNC __pthread_disable_asynccancel
# define __local_multiple_threads __pthread_multiple_threads
# elif !defined NOT_IN_libc
# define CENABLE_FUNC __libc_enable_asynccancel
# define CDISABLE_FUNC __libc_disable_asynccancel
# define __local_multiple_threads __libc_multiple_threads
# elif defined IS_IN_librt
# define CENABLE_FUNC __librt_enable_asynccancel
# define CDISABLE_FUNC __librt_disable_asynccancel
# else
# error Unsupported library
# endif
# if defined IS_IN_libpthread || !defined NOT_IN_libc
# ifndef __ASSEMBLER__
extern int __local_multiple_threads attribute_hidden;
# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
# else
# define SINGLE_THREAD_P(reg) movi reg, __local_multiple_threads; \
l32i reg, reg, 0;
# endif
# else
# ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
# else
# define SINGLE_THREAD_P(reg) \
rur reg, threadptr; \
l32i reg, reg, MULTIPLE_THREADS_OFFSET;
# endif
# endif
#else
/* This code should never be used but we define it anyhow. */
# define SINGLE_THREAD_P (1)
# define NO_CANCELLATION 1
#endif
#ifndef __ASSEMBLER__
# define RTLD_SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
header.multiple_threads) == 0, 1)
#endif
|
