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
|
$NetBSD: patch-al,v 1.1 2001/01/09 16:14:21 briggs Exp $
--- /dev/null Wed Dec 31 19:00:00 1969
+++ machdep/engine-powerpc-netbsd.c Tue Jan 9 10:43:05 2001
@@ -0,0 +1,135 @@
+/* ==== machdep.c ============================================================
+ * Copyright (c) 1993, 1994 Chris Provenzano, proven@athena.mit.edu
+ *
+ * Description : Machine dependent functions for NetBSD/PowerPC (1.5+)
+ *
+ * 1.00 93/08/04 proven
+ * -Started coding this file.
+ *
+ * 2001/01/10 briggs
+ * -Modified to make it go with NetBSD/PowerPC
+ */
+
+#ifndef lint
+static const char rcsid[] = "engine-alpha-osf1.c,v 1.4.4.1 1995/12/13 05:41:37 proven Exp";
+#endif
+
+#include <pthread.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/syscall.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <stdio.h>
+
+/* ==========================================================================
+ * machdep_pthread_start()
+ */
+void machdep_pthread_start(void)
+{
+ context_switch_done();
+ pthread_sched_resume ();
+
+ /* XXXMLG
+ * This is EXTREMELY bogus, but it seems that this function is called
+ * with the pthread kernel locked. If this happens, __errno() will
+ * return the wrong address until after the first context switch.
+ *
+ * Clearly there is a leak of pthread_kernel somewhere, but until
+ * it is found, we force a context switch here, just before calling
+ * the thread start routine. When we return from pthread_yield
+ * the kernel will be unlocked.
+ */
+ pthread_yield();
+
+ /* Run current threads start routine with argument */
+ pthread_exit(pthread_run->machdep_data.start_routine
+ (pthread_run->machdep_data.start_argument));
+
+ /* should never reach here */
+ PANIC("setitimer failed");
+}
+
+/* ==========================================================================
+ * __machdep_pthread_create()
+ */
+void __machdep_pthread_create(struct machdep_pthread *machdep_pthread,
+ void *(* start_routine)(void *), void *start_argument,
+ long stack_size, long nsec, long flags)
+{
+ machdep_pthread->start_routine = start_routine;
+ machdep_pthread->start_argument = start_argument;
+
+ machdep_pthread->machdep_timer.it_value.tv_sec = 0;
+ machdep_pthread->machdep_timer.it_interval.tv_sec = 0;
+ machdep_pthread->machdep_timer.it_interval.tv_usec = 0;
+ machdep_pthread->machdep_timer.it_value.tv_usec = nsec / 1000;
+
+ /* Set up new stack frame so that it looks like it returned from a
+ longjmp() to the beginning of machdep_pthread_start(). */
+ /* state is sigmask, then r8-r31 where r11 is the LR
+ * So, istate[3] is r10, which is the SP
+ * So, istate[4] is r11, which is the LR
+ * So, istate[5] is r12, which is the CR
+ */
+ machdep_pthread->machdep_istate[4] = (long)machdep_pthread_start;
+ machdep_pthread->machdep_istate[5] = 0;
+
+ /* PowerPC stack starts high and builds down, and needs to be 16-byte
+ aligned. */
+ machdep_pthread->machdep_istate[3] =
+ ((long) machdep_pthread->machdep_stack + stack_size) & ~0xf;
+}
+
+/* ==========================================================================
+ * machdep_save_state()
+ */
+int machdep_save_state(void)
+{
+ return( _setjmp(pthread_run->machdep_data.machdep_istate) );
+}
+
+void machdep_restore_state(void)
+{
+ _longjmp(pthread_run->machdep_data.machdep_istate, 1);
+}
+
+void machdep_save_float_state (struct pthread *pthread)
+{
+ __machdep_save_fp_state(pthread->machdep_data.machdep_fstate);
+}
+
+void machdep_restore_float_state (void)
+{
+ __machdep_restore_fp_state(pthread_run->machdep_data.machdep_fstate);
+}
+
+/* ==========================================================================
+ * machdep_set_thread_timer()
+ */
+void machdep_set_thread_timer(struct machdep_pthread *machdep_pthread)
+{
+ if (setitimer(ITIMER_VIRTUAL, &(machdep_pthread->machdep_timer), NULL)) {
+ PANIC("setitimer failed");
+ }
+}
+
+/* ==========================================================================
+ * machdep_unset_thread_timer()
+ */
+void machdep_unset_thread_timer(struct machdep_pthread *machdep_pthread)
+{
+ struct itimerval zeroval = { { 0, 0 }, { 0, 0} };
+
+ if (setitimer(ITIMER_VIRTUAL, &zeroval, NULL)) {
+ PANIC("setitimer failed");
+ }
+}
+
+/* ==========================================================================
+ * machdep_pthread_cleanup()
+ */
+void *machdep_pthread_cleanup(struct machdep_pthread *machdep_pthread)
+{
+ return(machdep_pthread->machdep_stack);
+}
|
