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
|
/* Copyright (C) 2002-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Alexandre Oliva <aoliva@redhat.com>
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>
#include <pt-machine.h>
#ifndef __ASSEMBLER__
# include <linuxthreads/internals.h>
#endif
#if !defined NOT_IN_libc || defined IS_IN_libpthread || defined IS_IN_librt
# undef PSEUDO
# define PSEUDO(name, syscall_name, args) \
.text ; \
ENTRY (name) \
PUSHARGS_##args \
DOARGS_##args \
SINGLE_THREAD_P; \
bne L(pseudo_cancel); \
mov SYS_ify (syscall_name),d0; \
syscall 0 \
POPARGS_##args ; \
cmp -126,d0; \
bls L(pseudo_end); \
jmp SYSCALL_ERROR_LABEL; \
L(pseudo_cancel): \
add -(16+STACK_SPACE (args)),sp; \
SAVE_ARGS_##args \
CENABLE \
mov d0,r0; \
LOAD_ARGS_##args \
mov SYS_ify (syscall_name),d0; \
syscall 0; \
mov d0,(12,sp); \
mov r0,d0; \
CDISABLE \
mov (12,sp),d0; \
add +16+STACK_SPACE (args),sp \
POPARGS_##args ; \
cmp -126,d0; \
bls L(pseudo_end); \
jmp SYSCALL_ERROR_LABEL; \
L(pseudo_end): \
mov d0,a0
/* Reserve up to 2 stack slots for a0 and d1, but fewer than that if
we don't have that many arguments. */
# define STACK_SPACE(n) (((((n) < 3) * (2 - (n))) + 2) * 4)
# define SAVE_ARGS_0
# define SAVE_ARGS_1 mov a0,(20,sp) ;
# define SAVE_ARGS_2 SAVE_ARGS_1 mov d1,(24,sp) ;
# define SAVE_ARGS_3 SAVE_ARGS_2
# define SAVE_ARGS_4 SAVE_ARGS_3
# define SAVE_ARGS_5 SAVE_ARGS_4
# define SAVE_ARGS_6 SAVE_ARGS_5
# define LOAD_ARGS_0
# define LOAD_ARGS_1 mov (20,sp),a0 ;
# define LOAD_ARGS_2 LOAD_ARGS_1 mov (24,sp),d1 ;
# define LOAD_ARGS_3 LOAD_ARGS_2
# define LOAD_ARGS_4 LOAD_ARGS_3
# define LOAD_ARGS_5 LOAD_ARGS_4
# define LOAD_ARGS_6 LOAD_ARGS_5
# ifdef IS_IN_libpthread
# define CENABLE call __pthread_enable_asynccancel,[],0;
# define CDISABLE call __pthread_disable_asynccancel,[],0;
# elif defined IS_IN_librt
# ifdef PIC
# define CENABLE movm [a2],(sp); \
1: mov pc,a2; \
add _GLOBAL_OFFSET_TABLE_-(1b-.),a2; \
call +__librt_enable_asynccancel@PLT,[],0; \
movm (sp),[a2];
# define CENABLE movm [a2],(sp); \
1: mov pc,a2; \
add _GLOBAL_OFFSET_TABLE_-(1b-.),a2; \
call +__librt_disable_asynccancel@PLT,[],0; \
movm (sp),[a2];
# else
# define CENABLE call +__librt_enable_asynccancel,[],0;
# define CDISABLE call +__librt_disable_asynccancel,[],0;
# endif
# else
# define CENABLE call +__libc_enable_asynccancel,[],0;
# define CDISABLE call +__libc_disable_asynccancel,[],0;
# endif
#if !defined NOT_IN_libc
# define __local_multiple_threads __libc_multiple_threads
#elif defined IS_IN_libpthread
# define __local_multiple_threads __pthread_multiple_threads
#else
# define __local_multiple_threads __librt_multiple_threads
#endif
# ifndef __ASSEMBLER__
# if defined FLOATING_STACKS && USE___THREAD && defined PIC
# define SINGLE_THREAD_P \
__builtin_expect (THREAD_GETMEM (THREAD_SELF, \
p_header.data.multiple_threads) == 0, 1)
# else
extern int __local_multiple_threads
# if !defined NOT_IN_libc || defined IS_IN_libpthread
attribute_hidden;
# else
;
# endif
# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
# endif
# else
# if !defined PIC
# define SINGLE_THREAD_P \
mov (+__local_multiple_threads),d0; \
cmp 0,d0
# elif !defined NOT_IN_libc || defined IS_IN_libpthread
# define SINGLE_THREAD_P \
movm [a2],(sp); \
1: mov pc,a2; \
add _GLOBAL_OFFSET_TABLE_-(1b-.),a2; \
mov (+__local_multiple_threads@GOTOFF,a2),d0; \
movm (sp),[a2]; \
cmp 0,d0
# else
# define SINGLE_THREAD_P \
movm [a2],(sp); \
1: mov pc,a2; \
add _GLOBAL_OFFSET_TABLE_-(1b-.),a2; \
mov (+__local_multiple_threads@GOT,a2),a2; \
mov (a2),d0; \
movm (sp),[a2]; \
cmp 0,d0
# endif
# endif
#elif !defined __ASSEMBLER__
/* This code should never be used but we define it anyhow. */
# define SINGLE_THREAD_P (1)
#endif
|
