Text file src/pkg/runtime/cgo/gcc_ppc64x.c

     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	}

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