runtime: windows/amd64 port

R=rsc, alex.brainman, hectorchu, r
CC=golang-dev
https://golang.org/cl/3759042

src/pkg/runtime/cgo/windows_amd64.c

@@ -37,11 +37,21 @@ threadentry(void *v)
 	ts.g->stackbase = (uintptr)&ts;
 
 	/*
-	* libcgo_sys_thread_start set stackguard to stack size;
-	* change to actual guard pointer.
-	*/
+	 * libcgo_sys_thread_start set stackguard to stack size;
+	 * change to actual guard pointer.
+	 */
 	ts.g->stackguard = (uintptr)&ts - ts.g->stackguard + 4096;
 
-	crosscall_386(ts.fn);
+	/*
+	 * Set specific keys in thread local storage.
+	 */
+	asm volatile (
+	  "movq %%gs:0x58, %%rax\n" // MOVQ 0x58(GS), tmp
+	  "movq %0, 0(%%rax)\n" // MOVQ g, 0(GS)
+	  "movq %1, 8(%%rax)\n" // MOVQ m, 8(GS)
+	  :: "r"(ts.g), "r"(ts.m) : "%rax"
+	);
+
+	crosscall_amd64(ts.fn);
 	return nil;
 }

src/pkg/runtime/mkasmh.sh

@@ -61,14 +61,23 @@ case "$GOARCH" in
 	esac
 	;;
 amd64)
-	# The offsets 0 and 8 are known to:
-	#	../../cmd/6l/pass.c:/D_GS
-	#	../../libcgo/linux_amd64.c:/^threadentry
-	#	../../libcgo/darwin_amd64.c:/^threadentry
-	#
-	echo '#define	get_tls(r)'
-	echo '#define	g(r) 0(GS)'
-	echo '#define	m(r) 8(GS)'
+	case "$GOOS" in
+	windows)
+		echo '#define	get_tls(r) MOVQ 0x58(GS), r'
+		echo '#define	g(r) 0(r)'
+		echo '#define	m(r) 8(r)'
+		;;
+	*)
+		# The offsets 0 and 8 are known to:
+		#	../../cmd/6l/pass.c:/D_GS
+		#	../../libcgo/linux_amd64.c:/^threadentry
+		#	../../libcgo/darwin_amd64.c:/^threadentry
+		#
+		echo '#define	get_tls(r)'
+		echo '#define	g(r) 0(GS)'
+		echo '#define	m(r) 8(GS)'
+		;;
+	esac
 	;;
 arm)
 	echo '#define	g	R10'

src/pkg/runtime/proc.c

@@ -77,7 +77,7 @@ struct Sched {
 };
 
 Sched runtime·sched;
-int32 gomaxprocs;
+int32 runtime·gomaxprocs;
 
 // An m that is waiting for notewakeup(&m->havenextg).  This may be
 // only be accessed while the scheduler lock is held.  This is used to

src/pkg/runtime/runtime.h

@@ -242,6 +242,11 @@ struct	M
 	uint32	fflag;		// floating point compare flags
 #ifdef __WINDOWS__
 	void*	sehframe;
+
+#ifdef _64BIT	
+	void*	gostack;
+#endif
+
 #endif
 };
 

src/pkg/runtime/windows/amd64/defs.h

@@ -0,0 +1,40 @@
+// g:\opensource\go\bin\godefs.exe -f -m64 defs.c
+
+// MACHINE GENERATED - DO NOT EDIT.
+
+// Constants
+enum {
+	PROT_NONE = 0,
+	PROT_READ = 0x1,
+	PROT_WRITE = 0x2,
+	PROT_EXEC = 0x4,
+	MAP_ANON = 0x1,
+	MAP_PRIVATE = 0x2,
+	SIGINT = 0x2,
+	CTRL_C_EVENT = 0,
+	CTRL_BREAK_EVENT = 0x1,
+	EXCEPTION_ACCESS_VIOLATION = 0xc0000005,
+	EXCEPTION_BREAKPOINT = 0x80000003,
+	EXCEPTION_FLT_DENORMAL_OPERAND = 0xc000008d,
+	EXCEPTION_FLT_DIVIDE_BY_ZERO = 0xc000008e,
+	EXCEPTION_FLT_INEXACT_RESULT = 0xc000008f,
+	EXCEPTION_FLT_OVERFLOW = 0xc0000091,
+	EXCEPTION_FLT_UNDERFLOW = 0xc0000093,
+	EXCEPTION_INT_DIVIDE_BY_ZERO = 0xc0000094,
+	EXCEPTION_INT_OVERFLOW = 0xc0000095,
+};
+
+// Types
+#pragma pack on
+
+typedef struct ExceptionRecord ExceptionRecord;
+struct ExceptionRecord {
+	uint32 ExceptionCode;
+	uint32 ExceptionFlags;
+	ExceptionRecord *ExceptionRecord;
+	void *ExceptionAddress;
+	uint32 NumberParameters;
+	byte pad_godefs_0[4];
+	uint64 ExceptionInformation[15];
+};
+#pragma pack off

src/pkg/runtime/windows/amd64/rt0.s

@@ -0,0 +1,10 @@
+// Copyright 2011 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.
+
+#include "amd64/asm.h"
+
+TEXT	_rt0_amd64_windows(SB),7,$-8
+	MOVQ	$_rt0_amd64(SB), AX
+	MOVQ	SP, DI
+	JMP	AX

src/pkg/runtime/windows/amd64/signal.c

@@ -0,0 +1,20 @@
+// Copyright 2011 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.
+
+#include "runtime.h"
+#include "defs.h"
+#include "os.h"
+
+void
+runtime·initsig(int32 queue)
+{
+}
+
+void
+runtime·resetcpuprofiler(int32 hz)
+{
+	// TODO: Enable profiling interrupts.
+	
+	m->profilehz = hz;
+}

src/pkg/runtime/windows/amd64/sys.s

@@ -0,0 +1,129 @@
+// Copyright 2011 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.
+
+#include "amd64/asm.h"
+
+// void *stdcall_raw(void *fn, uintptr nargs, void *args)
+TEXT runtime·stdcall_raw(SB),7,$8
+	MOVQ	fn+0(FP), AX
+	MOVQ	nargs+8(FP), CX
+	MOVQ	args+16(FP), R11
+
+	// Switch to m->g0 if needed.
+	get_tls(DI)
+	MOVQ	m(DI), DX
+	MOVQ	g(DI), SI
+	MOVQ	SI, 0(SP)		// save g
+	MOVQ	SP, m_gostack(DX)	// save SP
+	MOVQ	m_g0(DX), SI
+	CMPQ	g(DI), SI
+	JEQ 3(PC)
+	MOVQ	(g_sched+gobuf_sp)(SI), SP
+	MOVQ	SI, g(DI)
+	
+	SUBQ	$0x60, SP
+	
+	// Copy args to new stack.
+	MOVQ	SP, DI
+	MOVQ	R11, SI
+	CLD
+	REP; MOVSQ
+	MOVQ	0(R11), CX
+	MOVQ	8(R11), DX
+	MOVQ	16(R11), R8
+	MOVQ	24(R11), R9
+
+	// Call stdcall function.
+	CALL	AX
+	
+	// Restore original SP, g.
+	get_tls(DI)
+	MOVQ	m(DI), DX
+	MOVQ	m_gostack(DX), SP	// restore SP
+	MOVQ	0(SP), SI		// restore g
+	MOVQ	SI, g(DI)
+
+	RET
+
+// faster get/set last error
+TEXT runtime·getlasterror(SB),7,$0
+	MOVQ	0x30(GS), AX
+	MOVL	0x68(AX), AX
+	RET
+
+TEXT runtime·setlasterror(SB),7,$0
+	MOVL	err+0(FP), AX
+	MOVQ	0x30(GS),	CX
+	MOVL	AX, 0x68(CX)
+	RET
+
+// Windows runs the ctrl handler in a new thread.
+TEXT runtime·ctrlhandler(SB),7,$0
+	// TODO
+	RET
+	
+TEXT runtime·callbackasm(SB),7,$0
+	// TODO
+	RET
+
+// void tstart(M *newm);
+TEXT runtime·tstart(SB),7,$0
+	MOVQ	newm+8(SP), CX		// m
+	MOVQ	m_g0(CX), DX		// g
+
+	MOVQ	SP, DI			// remember stack
+
+	// Layout new m scheduler stack on os stack.
+	MOVQ	SP, AX
+	MOVQ	AX, g_stackbase(DX)
+	SUBQ	$(64*1024), AX	// stack size
+	MOVQ	AX, g_stackguard(DX)
+
+	// Set up tls.
+	LEAQ	m_tls(CX), SI
+	MOVQ	SI, 0x58(GS)
+	MOVQ	CX, m(SI)
+	MOVQ	DX, g(SI)
+
+	// Someday the convention will be D is always cleared.
+	CLD
+
+	PUSHQ	DI			// original stack
+
+	CALL	runtime·stackcheck(SB)		// clobbers AX,CX
+
+	CALL	runtime·mstart(SB)
+
+	POPQ	DI			// original stack
+	MOVQ	DI, SP
+	
+	RET
+
+// uint32 tstart_stdcall(M *newm);
+TEXT runtime·tstart_stdcall(SB),7,$0
+	MOVQ CX, BX // stdcall first arg in RCX
+
+	PUSHQ	BX
+	CALL	runtime·tstart+0(SB)
+	POPQ	BX
+
+	// Adjust stack for stdcall to return properly.
+	MOVQ	(SP), AX		// save return address
+	ADDQ	$8, SP			// remove single parameter
+	MOVQ	AX, (SP)		// restore return address
+
+	XORL	AX, AX			// return 0 == success
+
+	RET
+
+TEXT runtime·notok(SB),7,$0
+	MOVQ	$0xf1, BP
+	MOVQ	BP, (BP)
+	RET
+
+// set tls base to DI
+TEXT runtime·settls(SB),7,$0
+	MOVQ	DI, 0x58(GS)
+	RET
+

src/pkg/runtime/windows/thread.c

@@ -219,7 +219,7 @@ runtime·gettime(int64 *sec, int32 *usec)
 void *
 runtime·stdcall(void *fn, int32 count, ...)
 {
-	return runtime·stdcall_raw(fn, count, (uintptr*)(&count + 1));
+	return runtime·stdcall_raw(fn, count, (uintptr*)&count + 1);
 }
 
 uintptr