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 #include "libcgo_windows.h"
13
14 static void threadentry(void*);
15 static void (*setg_gcc)(void*);
16 static DWORD *tls_g;
17
18 void
x_cgo_init(G * g,void (* setg)(void *),void ** tlsg,void ** tlsbase)19 x_cgo_init(G *g, void (*setg)(void*), void **tlsg, void **tlsbase)
20 {
21 setg_gcc = setg;
22 tls_g = (DWORD *)tlsg;
23 }
24
25
26 void
_cgo_sys_thread_start(ThreadStart * ts)27 _cgo_sys_thread_start(ThreadStart *ts)
28 {
29 _cgo_beginthread(threadentry, ts);
30 }
31
32 extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
33 static void
threadentry(void * v)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 "movq %0, %%gs:0(%1)\n" // MOVL tls0, 0(tls_g)(GS)
48 :: "r"(ts.tls), "r"(*tls_g)
49 );
50
51 crosscall1(ts.fn, setg_gcc, (void*)ts.g);
52 }
53