gcc_windows_amd64.c

Documentation: runtime/cgo

     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
    14static unsigned long __stdcall threadentry(void*);
    15static void (*setg_gcc)(void*);
    16static DWORD *tls_g;
    17
    18void
    19x_cgo_init(G *g, void (*setg)(void*), void **tlsg, void **tlsbase)
    20{
    21	setg_gcc = setg;
    22	tls_g = (DWORD *)tlsg;
    23}
    24
    25
    26void
    27_cgo_sys_thread_start(ThreadStart *ts)
    28{
    29	_cgo_beginthread(threadentry, ts);
    30}
    31
    32extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
    33static unsigned long
    34__stdcall
    35threadentry(void *v)
    36{
    37	ThreadStart ts;
    38
    39	ts = *(ThreadStart*)v;
    40	free(v);
    41
    42	// minit queries stack bounds from the OS.
    43
    44	/*
    45	 * Set specific keys in thread local storage.
    46	 */
    47	asm volatile (
    48	  "movq %0, %%gs:0(%1)\n"	// MOVL tls0, 0(tls_g)(GS)
    49	  :: "r"(ts.tls), "r"(*tls_g)
    50	);
    51
    52	crosscall1(ts.fn, setg_gcc, (void*)ts.g);
    53	return 0;
    54}
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