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 WIN64_LEAN_AND_MEAN 6 #include <windows.h> 7 #include <process.h> 8 #include <stdlib.h> 9 #include <stdio.h> 10 #include "libcgo.h" 11 12 static void threadentry(void*); 13 14 /* 2MB is default stack size for 64-bit Windows. 15 Allocation granularity on Windows is typically 64 KB. 16 The constant is also hardcoded in cmd/ld/pe.c (keep synchronized). */ 17 #define STACKSIZE (2*1024*1024) 18 19 void 20 x_cgo_init(G *g) 21 { 22 int tmp; 23 g->stacklo = (uintptr)&tmp - STACKSIZE + 8*1024; 24 } 25 26 27 void 28 _cgo_sys_thread_start(ThreadStart *ts) 29 { 30 uintptr_t thandle; 31 32 thandle = _beginthread(threadentry, 0, ts); 33 if(thandle == -1) { 34 fprintf(stderr, "runtime: failed to create new OS thread (%d)\n", errno); 35 abort(); 36 } 37 } 38 39 static void 40 threadentry(void *v) 41 { 42 ThreadStart ts; 43 44 ts = *(ThreadStart*)v; 45 free(v); 46 47 ts.g->stackhi = (uintptr)&ts; 48 ts.g->stacklo = (uintptr)&ts - STACKSIZE + 8*1024; 49 50 /* 51 * Set specific keys in thread local storage. 52 */ 53 asm volatile ( 54 "movq %0, %%gs:0x28\n" // MOVL tls0, 0x28(GS) 55 "movq %%gs:0x28, %%rax\n" // MOVQ 0x28(GS), tmp 56 "movq %1, 0(%%rax)\n" // MOVQ g, 0(GS) 57 :: "r"(ts.tls), "r"(ts.g) : "%rax" 58 ); 59 60 crosscall_amd64(ts.fn); 61 } 62
