gcc_windows_386.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
    25void
    26_cgo_sys_thread_start(ThreadStart *ts)
    27{
    28	_cgo_beginthread(threadentry, ts);
    29}
    30
    31extern void crosscall1(void (*fn)(void), void (*setg_gcc)(void*), void *g);
    32static unsigned long
    33__stdcall
    34threadentry(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:0(%1)\n"	// MOVL tls0, 0(tls_g)(FS)
    48		"movl %%fs:0(%1), %%eax\n"	// MOVL 0(tls_g)(FS), tmp
    49		"movl %2, 0(%%eax)\n"	// MOVL g, 0(AX)
    50		:: "r"(ts.tls), "r"(*tls_g), "r"(ts.g) : "%eax"
    51	);
    52
    53	crosscall1(ts.fn, setg_gcc, ts.g);
    54	return 0;
    55}
View as plain text