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
|
/* Copyright (C) 2002-2015 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Jakub Jelinek <jakub@redhat.com>, 2002.
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 <sysdep.h>
#include <tls.h>
#ifndef __ASSEMBLER__
# include <nptl/pthreadP.h>
#endif
#if IS_IN (libc) || IS_IN (libpthread) || IS_IN (librt)
# undef PSEUDO
# if IS_IN (libc)
# define SYSDEP_CANCEL_ERRNO __libc_errno
# else
# define SYSDEP_CANCEL_ERRNO errno
# endif
# define SYSDEP_CANCEL_ERROR(args) \
.section .gnu.linkonce.t.__syscall_error_##args, "ax"; \
.align 32; \
.proc __syscall_error_##args; \
.global __syscall_error_##args; \
.hidden __syscall_error_##args; \
.size __syscall_error_##args, 64; \
__syscall_error_##args: \
.prologue; \
.regstk args, 5, args, 0; \
.save ar.pfs, loc0; \
.save rp, loc1; \
.body; \
addl loc4 = @ltoff(@tprel(SYSDEP_CANCEL_ERRNO)), gp;; \
ld8 loc4 = [loc4]; \
mov rp = loc1;; \
mov r8 = -1; \
add loc4 = loc4, r13;; \
st4 [loc4] = loc3; \
mov ar.pfs = loc0
# ifndef USE_DL_SYSINFO
# define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
adds r14 = MULTIPLE_THREADS_OFFSET, r13;; \
ld4 r14 = [r14]; \
mov r15 = SYS_ify(syscall_name);; \
cmp4.ne p6, p7 = 0, r14; \
(p6) br.cond.spnt .Lpseudo_cancel;; \
break __BREAK_SYSCALL;; \
cmp.eq p6,p0=-1,r10; \
(p6) br.cond.spnt.few __syscall_error; \
ret;; \
.endp name; \
.proc __GC_##name; \
.globl __GC_##name; \
.hidden __GC_##name; \
__GC_##name: \
.Lpseudo_cancel: \
.prologue; \
.regstk args, 5, args, 0; \
.save ar.pfs, loc0; \
alloc loc0 = ar.pfs, args, 5, args, 0; \
.save rp, loc1; \
mov loc1 = rp;; \
.body; \
CENABLE;; \
mov loc2 = r8; \
COPY_ARGS_##args \
mov r15 = SYS_ify(syscall_name); \
break __BREAK_SYSCALL;; \
mov loc3 = r8; \
mov loc4 = r10; \
mov out0 = loc2; \
CDISABLE;; \
cmp.eq p6,p0=-1,loc4; \
(p6) br.cond.spnt.few __syscall_error_##args; \
mov r8 = loc3; \
mov rp = loc1; \
mov ar.pfs = loc0; \
.Lpseudo_end: \
ret; \
.endp __GC_##name; \
SYSDEP_CANCEL_ERROR(args)
# else /* USE_DL_SYSINFO */
# define PSEUDO(name, syscall_name, args) \
.text; \
ENTRY (name) \
.prologue; \
adds r2 = SYSINFO_OFFSET, r13; \
adds r14 = MULTIPLE_THREADS_OFFSET, r13; \
.save ar.pfs, r11; \
mov r11 = ar.pfs;; \
.body; \
ld4 r14 = [r14]; \
ld8 r2 = [r2]; \
mov r15 = SYS_ify(syscall_name);; \
cmp4.ne p6, p7 = 0, r14; \
mov b7 = r2; \
(p6) br.cond.spnt .Lpseudo_cancel; \
br.call.sptk.many b6 = b7;; \
mov ar.pfs = r11; \
cmp.eq p6,p0 = -1, r10; \
(p6) br.cond.spnt.few __syscall_error; \
ret;; \
.endp name; \
\
.proc __##syscall_name##_nocancel; \
.globl __##syscall_name##_nocancel; \
__##syscall_name##_nocancel: \
.prologue; \
adds r2 = SYSINFO_OFFSET, r13; \
.save ar.pfs, r11; \
mov r11 = ar.pfs;; \
.body; \
ld8 r2 = [r2]; \
mov r15 = SYS_ify(syscall_name);; \
mov b7 = r2; \
br.call.sptk.many b6 = b7;; \
mov ar.pfs = r11; \
cmp.eq p6,p0 = -1, r10; \
(p6) br.cond.spnt.few __syscall_error; \
ret;; \
.endp __##syscall_name##_nocancel; \
\
.proc __GC_##name; \
.globl __GC_##name; \
.hidden __GC_##name; \
__GC_##name: \
.Lpseudo_cancel: \
.prologue; \
.regstk args, 5, args, 0; \
.save ar.pfs, loc0; \
alloc loc0 = ar.pfs, args, 5, args, 0; \
adds loc4 = SYSINFO_OFFSET, r13; \
.save rp, loc1; \
mov loc1 = rp;; \
.body; \
ld8 loc4 = [loc4]; \
CENABLE;; \
mov loc2 = r8; \
mov b7 = loc4; \
COPY_ARGS_##args \
mov r15 = SYS_ify(syscall_name); \
br.call.sptk.many b6 = b7;; \
mov loc3 = r8; \
mov loc4 = r10; \
mov out0 = loc2; \
CDISABLE;; \
cmp.eq p6,p0=-1,loc4; \
(p6) br.cond.spnt.few __syscall_error_##args; \
mov r8 = loc3; \
mov rp = loc1; \
mov ar.pfs = loc0; \
.Lpseudo_end: \
ret; \
.endp __GC_##name; \
SYSDEP_CANCEL_ERROR(args)
# endif /* USE_DL_SYSINFO */
# undef PSEUDO_END
# define PSEUDO_END(name) .endp
# if IS_IN (libpthread)
# define CENABLE br.call.sptk.many b0 = __pthread_enable_asynccancel
# define CDISABLE br.call.sptk.many b0 = __pthread_disable_asynccancel
# elif IS_IN (libc)
# define CENABLE br.call.sptk.many b0 = __libc_enable_asynccancel
# define CDISABLE br.call.sptk.many b0 = __libc_disable_asynccancel
# elif IS_IN (librt)
# define CENABLE br.call.sptk.many b0 = __librt_enable_asynccancel
# define CDISABLE br.call.sptk.many b0 = __librt_disable_asynccancel
# else
# error Unsupported library
# endif
# define COPY_ARGS_0 /* Nothing */
# define COPY_ARGS_1 COPY_ARGS_0 mov out0 = in0;
# define COPY_ARGS_2 COPY_ARGS_1 mov out1 = in1;
# define COPY_ARGS_3 COPY_ARGS_2 mov out2 = in2;
# define COPY_ARGS_4 COPY_ARGS_3 mov out3 = in3;
# define COPY_ARGS_5 COPY_ARGS_4 mov out4 = in4;
# define COPY_ARGS_6 COPY_ARGS_5 mov out5 = in5;
# define COPY_ARGS_7 COPY_ARGS_6 mov out6 = in6;
# ifndef __ASSEMBLER__
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, header.multiple_threads) == 0, 1)
# else
# define SINGLE_THREAD_P \
adds r14 = MULTIPLE_THREADS_OFFSET, r13 ;; ld4 r14 = [r14] ;; cmp4.ne p6, p7 = 0, r14
# endif
#elif !defined __ASSEMBLER__
# 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
|
