1 // Copyright 2014 The Go Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style
3 // license that can be found in the LICENSE file.
4
5 // +build ppc64 ppc64le
6
7 #include <pthread.h>
8 #include <string.h>
9 #include <signal.h>
10 #include "libcgo.h"
11 #include "libcgo_unix.h"
12
13 static void *threadentry(void*);
14
15 void (*x_cgo_inittls)(void **tlsg, void **tlsbase);
16 static void (*setg_gcc)(void*);
17
18 void
19 x_cgo_init(G *g, void (*setg)(void*), void **tlsbase)
20 {
21 pthread_attr_t attr;
22 size_t size;
23
24 setg_gcc = setg;
25 pthread_attr_init(&attr);
26 pthread_attr_getstacksize(&attr, &size);
27 g->stacklo = (uintptr)&attr - size + 4096;
28 pthread_attr_destroy(&attr);
29 }
30
31 void
32 _cgo_sys_thread_start(ThreadStart *ts)
33 {
34 pthread_attr_t attr;
35 sigset_t ign, oset;
36 pthread_t p;
37 size_t size;
38 int err;
39
40 sigfillset(&ign);
41 pthread_sigmask(SIG_SETMASK, &ign, &oset);
42
43 pthread_attr_init(&attr);
44 pthread_attr_getstacksize(&attr, &size);
45 // Leave stacklo=0 and set stackhi=size; mstart will do the rest.
46 ts->g->stackhi = size;
47 err = _cgo_try_pthread_create(&p, &attr, threadentry, ts);
48
49 pthread_sigmask(SIG_SETMASK, &oset, nil);
50
51 if (err != 0) {
52 fatalf("pthread_create failed: %s", strerror(err));
53 }
54 }
55
56 extern void crosscall_ppc64(void (*fn)(void), void *g);
57
58 static void*
59 threadentry(void *v)
60 {
61 ThreadStart ts;
62
63 ts = *(ThreadStart*)v;
64 free(v);
65
66 // Save g for this thread in C TLS
67 setg_gcc((void*)ts.g);
68
69 crosscall_ppc64(ts.fn, (void*)ts.g);
70 return nil;
71 }
72
View as plain text