github.com/c12o16h1/go/src@v0.0.0-20200114212001-5a151c0f00ed/runtime/cgo/gcc_windows_386.c (about)

     1  // Copyright 2009 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  #define WIN32_LEAN_AND_MEAN
     6  #include <windows.h>
     7  #include <process.h>
     8  #include <stdlib.h>
     9  #include <stdio.h>
    10  #include <errno.h>
    11  #include "libcgo.h"
    12  
    13  static void threadentry(void*);
    14  
    15  void
    16  x_cgo_init(G *g)
    17  {
    18  }
    19  
    20  
    21  void
    22  _cgo_sys_thread_start(ThreadStart *ts)
    23  {
    24  	uintptr_t thandle;
    25  
    26  	thandle = _beginthread(threadentry, 0, ts);
    27  	if(thandle == -1) {
    28  		fprintf(stderr, "runtime: failed to create new OS thread (%d)\n", errno);
    29  		abort();
    30  	}
    31  }
    32  
    33  static void
    34  threadentry(void *v)
    35  {
    36  	ThreadStart ts;
    37  
    38  	ts = *(ThreadStart*)v;
    39  	free(v);
    40  
    41  	// minit queries stack bounds from the OS.
    42  
    43  	/*
    44  	 * Set specific keys in thread local storage.
    45  	 */
    46  	asm volatile (
    47  		"movl %0, %%fs:0x14\n"	// MOVL tls0, 0x14(FS)
    48  		"movl %%fs:0x14, %%eax\n"	// MOVL 0x14(FS), tmp
    49  		"movl %1, 0(%%eax)\n"	// MOVL g, 0(FS)
    50  		:: "r"(ts.tls), "r"(ts.g) : "%eax"
    51  	);
    52  	
    53  	crosscall_386(ts.fn);
    54  }