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
