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
|
Index: uClibc/libpthread/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ uClibc/libpthread/linuxthreads/sysdeps/unix/sysv/linux/arm/vfork.S 2008-08-28 00:22:06.278340855 +0200
@@ -0,0 +1,78 @@
+/* Copyright (C) 1999, 2002, 2003, 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Philip Blundell <philb@gnu.org>.
+
+ 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-cancel.h>
+#define _ERRNO_H 1
+#include <bits/errno.h>
+#include <kernel-features.h>
+
+/* Clone the calling process, but without copying the whole address space.
+ The calling process is suspended until the new process exits or is
+ replaced by a call to `execve'. Return -1 for errors, 0 to the new process,
+ and the process ID of the new process to the old process. */
+
+ENTRY (__vfork)
+
+#ifdef __NR_vfork
+
+#ifdef SHARED
+ ldr ip, 1f
+ ldr r0, 2f
+3: add ip, pc, ip
+ ldr r0, [ip, r0]
+#else
+ ldr r0, 1f
+#endif
+ movs r0, r0
+ bne HIDDEN_JUMPTARGET (__fork)
+
+ DO_CALL (vfork, 0)
+ cmn a1, #4096
+ RETINSTR(cc, lr)
+
+#ifndef __ASSUME_VFORK_SYSCALL
+ /* Check if vfork syscall is known at all. */
+ cmn a1, #ENOSYS
+ bne PLTJMP(C_SYMBOL_NAME(__syscall_error))
+#endif
+
+#endif
+
+#ifndef __ASSUME_VFORK_SYSCALL
+ /* If we don't have vfork, fork is close enough. */
+ DO_CALL (fork, 0)
+ cmn a1, #4096
+ RETINSTR(cc, lr)
+#elif !defined __NR_vfork
+# error "__NR_vfork not available and __ASSUME_VFORK_SYSCALL defined"
+#endif
+ b PLTJMP(C_SYMBOL_NAME(__syscall_error))
+
+#ifdef SHARED
+1: .word _GLOBAL_OFFSET_TABLE_ - 3b - 8
+2: .word __libc_pthread_functions(GOTOFF)
+#else
+ .weak pthread_create
+1: .word pthread_create
+#endif
+
+PSEUDO_END (__vfork)
+libc_hidden_def (__vfork)
+
+weak_alias (__vfork, vfork)
Index: uClibc/libpthread/linuxthreads/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ uClibc/libpthread/linuxthreads/sysdeps/unix/sysv/linux/arm/sysdep-cancel.h 2008-08-28 00:28:04.301636993 +0200
@@ -0,0 +1,130 @@
+/* Copyright (C) 2003, 2005 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Phil Blundell <pb@nexus.co.uk>, 2003.
+
+ 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 <tls.h>
+#include <pt-machine.h>
+#ifndef __ASSEMBLER__
+# include <linuxthreads/internals.h>
+#endif
+
+#if !defined NOT_IN_libc || defined IS_IN_libpthread
+
+/* We push lr onto the stack, so we have to use ldmib instead of ldmia
+ to find the saved arguments. */
+# ifdef PIC
+# undef DOARGS_5
+# undef DOARGS_6
+# undef DOARGS_7
+# define DOARGS_5 str r4, [sp, $-4]!; ldr r4, [sp, $8];
+# define DOARGS_6 mov ip, sp; stmfd sp!, {r4, r5}; ldmib ip, {r4, r5};
+# define DOARGS_7 mov ip, sp; stmfd sp!, {r4, r5, r6}; ldmib ip, {r4, r5, r6};
+# endif
+
+# undef PSEUDO_RET
+# define PSEUDO_RET \
+ ldrcc pc, [sp], $4; \
+ ldr lr, [sp], $4; \
+ b PLTJMP(SYSCALL_ERROR)
+
+# undef PSEUDO
+# define PSEUDO(name, syscall_name, args) \
+ .section ".text"; \
+ PSEUDO_PROLOGUE; \
+ ENTRY (name); \
+ SINGLE_THREAD_P; \
+ bne .Lpseudo_cancel; \
+ DO_CALL (syscall_name, args); \
+ cmn r0, $4096; \
+ RETINSTR(cc, lr); \
+ b PLTJMP(SYSCALL_ERROR); \
+ .Lpseudo_cancel: \
+ str lr, [sp, $-4]!; \
+ DOCARGS_##args; /* save syscall args around CENABLE. */ \
+ CENABLE; \
+ mov ip, r0; /* put mask in safe place. */ \
+ UNDOCARGS_##args; /* restore syscall args. */ \
+ swi SYS_ify (syscall_name); /* do the call. */ \
+ str r0, [sp, $-4]!; /* save syscall return value. */ \
+ mov r0, ip; /* get mask back. */ \
+ CDISABLE; \
+ ldr r0, [sp], $4; /* retrieve return value. */ \
+ UNDOC2ARGS_##args; /* fix register damage. */ \
+ cmn r0, $4096;
+
+# define DOCARGS_0
+# define UNDOCARGS_0
+# define UNDOC2ARGS_0
+
+# define DOCARGS_1 str r0, [sp, #-4]!;
+# define UNDOCARGS_1 ldr r0, [sp], #4;
+# define UNDOC2ARGS_1
+
+# define DOCARGS_2 str r1, [sp, #-4]!; str r0, [sp, #-4]!;
+# define UNDOCARGS_2 ldr r0, [sp], #4; ldr r1, [sp], #4;
+# define UNDOC2ARGS_2
+
+# define DOCARGS_3 str r2, [sp, #-4]!; str r1, [sp, #-4]!; str r0, [sp, #-4]!;
+# define UNDOCARGS_3 ldr r0, [sp], #4; ldr r1, [sp], #4; ldr r2, [sp], #4
+# define UNDOC2ARGS_3
+
+# define DOCARGS_4 stmfd sp!, {r0-r3}
+# define UNDOCARGS_4 ldmfd sp!, {r0-r3}
+# define UNDOC2ARGS_4
+
+# define DOCARGS_5 stmfd sp!, {r0-r3}
+# define UNDOCARGS_5 ldmfd sp, {r0-r3}; str r4, [sp, #-4]!; ldr r4, [sp, #24]
+# define UNDOC2ARGS_5 ldr r4, [sp], #20
+
+# ifdef IS_IN_libpthread
+# define CENABLE bl PLTJMP(__pthread_enable_asynccancel)
+# define CDISABLE bl PLTJMP(__pthread_disable_asynccancel)
+# define __local_multiple_threads __pthread_multiple_threads
+# else
+# define CENABLE bl PLTJMP(__libc_enable_asynccancel)
+# define CDISABLE bl PLTJMP(__libc_disable_asynccancel)
+# define __local_multiple_threads __libc_multiple_threads
+# endif
+
+# ifndef __ASSEMBLER__
+extern int __local_multiple_threads attribute_hidden;
+# define SINGLE_THREAD_P __builtin_expect (__local_multiple_threads == 0, 1)
+# else
+# if !defined PIC
+# define SINGLE_THREAD_P \
+ ldr ip, =__local_multiple_threads; \
+ ldr ip, [ip]; \
+ teq ip, #0;
+# define PSEUDO_PROLOGUE
+# else
+# define SINGLE_THREAD_P \
+ ldr ip, 1b; \
+2: \
+ ldr ip, [pc, ip]; \
+ teq ip, #0;
+# define PSEUDO_PROLOGUE \
+ 1: .word __local_multiple_threads - 2f - 8;
+# endif
+# endif
+
+#elif !defined __ASSEMBLER__
+
+/* This code should never be used but we define it anyhow. */
+# define SINGLE_THREAD_P (1)
+
+#endif
|
