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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#define WIN64_LEAN_AND_MEAN
#include <windows.h>
#include <process.h>
#include <stdlib.h>
#include <stdio.h>
#include "libcgo.h"
static void threadentry(void*);
/* 2MB is default stack size for 64-bit Windows.
Allocation granularity on Windows is typically 64 KB.
The constant is also hardcoded in cmd/ld/pe.c (keep synchronized). */
#define STACKSIZE (2*1024*1024)
void
x_cgo_init(G *g)
{
int tmp;
g->stackguard = (uintptr)&tmp - STACKSIZE + 8*1024;
}
void
_cgo_sys_thread_start(ThreadStart *ts)
{
uintptr_t thandle;
thandle = _beginthread(threadentry, 0, ts);
if(thandle == -1) {
fprintf(stderr, "runtime: failed to create new OS thread (%d)\n", errno);
abort();
}
}
static void
threadentry(void *v)
{
ThreadStart ts;
ts = *(ThreadStart*)v;
free(v);
ts.g->stackbase = (uintptr)&ts;
ts.g->stackguard = (uintptr)&ts - STACKSIZE + 8*1024;
/*
* Set specific keys in thread local storage.
*/
asm volatile (
"movq %0, %%gs:0x28\n" // MOVL tls0, 0x28(GS)
"movq %%gs:0x28, %%rax\n" // MOVQ 0x28(GS), tmp
"movq %1, 0(%%rax)\n" // MOVQ g, 0(GS)
"movq %2, 8(%%rax)\n" // MOVQ m, 8(GS)
:: "r"(ts.tls), "r"(ts.g), "r"(ts.m) : "%rax"
);
crosscall_amd64(ts.fn);
}
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