github.com/euank/go@v0.0.0-20160829210321-495514729181/src/runtime/cgo/gcc_linux_ppc64x.c (about)

     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  
    12  static void *threadentry(void*);
    13  
    14  void (*x_cgo_inittls)(void **tlsg, void **tlsbase);
    15  static void (*setg_gcc)(void*);
    16  
    17  void
    18  x_cgo_init(G *g, void (*setg)(void*), void **tlsbase)
    19  {
    20  	pthread_attr_t attr;
    21  	size_t size;
    22  
    23  	setg_gcc = setg;
    24  	pthread_attr_init(&attr);
    25  	pthread_attr_getstacksize(&attr, &size);
    26  	g->stacklo = (uintptr)&attr - size + 4096;
    27  	pthread_attr_destroy(&attr);
    28  }
    29  
    30  void
    31  _cgo_sys_thread_start(ThreadStart *ts)
    32  {
    33  	pthread_attr_t attr;
    34  	sigset_t ign, oset;
    35  	pthread_t p;
    36  	size_t size;
    37  	int err;
    38  
    39  	sigfillset(&ign);
    40  	pthread_sigmask(SIG_SETMASK, &ign, &oset);
    41  
    42  	pthread_attr_init(&attr);
    43  	pthread_attr_getstacksize(&attr, &size);
    44  	// Leave stacklo=0 and set stackhi=size; mstack will do the rest.
    45  	ts->g->stackhi = size;
    46  	err = pthread_create(&p, &attr, threadentry, ts);
    47  
    48  	pthread_sigmask(SIG_SETMASK, &oset, nil);
    49  
    50  	if (err != 0) {
    51  		fatalf("pthread_create failed: %s", strerror(err));
    52  	}
    53  }
    54  
    55  extern void crosscall_ppc64(void (*fn)(void), void *g);
    56  
    57  static void*
    58  threadentry(void *v)
    59  {
    60  	ThreadStart ts;
    61  
    62  	ts = *(ThreadStart*)v;
    63  	free(v);
    64  
    65  	// Save g for this thread in C TLS
    66  	setg_gcc((void*)ts.g);
    67  
    68  	crosscall_ppc64(ts.fn, (void*)ts.g);
    69  	return nil;
    70  }