1 files changed, 358 insertions, 0 deletions
diff --git a/src/runtime/sys_windows_386.s b/src/runtime/sys_windows_386.s
new file mode 100644
index 0000000..cf3a439
--- /dev/null
+++ b/src/runtime/sys_windows_386.s
@@ -0,0 +1,358 @@
+// 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.
+
+#include "go_asm.h"
+#include "go_tls.h"
+#include "textflag.h"
+#include "time_windows.h"
+
+// void runtime·asmstdcall(void *c);
+TEXT runtime·asmstdcall(SB),NOSPLIT,$0
+	MOVL	fn+0(FP), BX
+
+	// SetLastError(0).
+	MOVL	$0, 0x34(FS)
+
+	// Copy args to the stack.
+	MOVL	SP, BP
+	MOVL	libcall_n(BX), CX	// words
+	MOVL	CX, AX
+	SALL	$2, AX
+	SUBL	AX, SP			// room for args
+	MOVL	SP, DI
+	MOVL	libcall_args(BX), SI
+	CLD
+	REP; MOVSL
+
+	// Call stdcall or cdecl function.
+	// DI SI BP BX are preserved, SP is not
+	CALL	libcall_fn(BX)
+	MOVL	BP, SP
+
+	// Return result.
+	MOVL	fn+0(FP), BX
+	MOVL	AX, libcall_r1(BX)
+	MOVL	DX, libcall_r2(BX)
+
+	// GetLastError().
+	MOVL	0x34(FS), AX
+	MOVL	AX, libcall_err(BX)
+
+	RET
+
+TEXT	runtime·badsignal2(SB),NOSPLIT,$24
+	// stderr
+	MOVL	$-12, 0(SP)
+	MOVL	SP, BP
+	CALL	*runtime·_GetStdHandle(SB)
+	MOVL	BP, SP
+
+	MOVL	AX, 0(SP)	// handle
+	MOVL	$runtime·badsignalmsg(SB), DX // pointer
+	MOVL	DX, 4(SP)
+	MOVL	runtime·badsignallen(SB), DX // count
+	MOVL	DX, 8(SP)
+	LEAL	20(SP), DX  // written count
+	MOVL	$0, 0(DX)
+	MOVL	DX, 12(SP)
+	MOVL	$0, 16(SP) // overlapped
+	CALL	*runtime·_WriteFile(SB)
+
+	// Does not return.
+	CALL	runtime·abort(SB)
+	RET
+
+// faster get/set last error
+TEXT runtime·getlasterror(SB),NOSPLIT,$0
+	MOVL	0x34(FS), AX
+	MOVL	AX, ret+0(FP)
+	RET
+
+// Called by Windows as a Vectored Exception Handler (VEH).
+// First argument is pointer to struct containing
+// exception record and context pointers.
+// Handler function is stored in AX.
+// Return 0 for 'not handled', -1 for handled.
+TEXT sigtramp<>(SB),NOSPLIT,$0-0
+	MOVL	ptrs+0(FP), CX
+	SUBL	$40, SP
+
+	// save callee-saved registers
+	MOVL	BX, 28(SP)
+	MOVL	BP, 16(SP)
+	MOVL	SI, 20(SP)
+	MOVL	DI, 24(SP)
+
+	MOVL	AX, SI	// save handler address
+
+	// find g
+	get_tls(DX)
+	CMPL	DX, $0
+	JNE	3(PC)
+	MOVL	$0, AX // continue
+	JMP	done
+	MOVL	g(DX), DX
+	CMPL	DX, $0
+	JNE	2(PC)
+	CALL	runtime·badsignal2(SB)
+
+	// save g in case of stack switch
+	MOVL	DX, 32(SP)	// g
+	MOVL	SP, 36(SP)
+
+	// do we need to switch to the g0 stack?
+	MOVL	g_m(DX), BX
+	MOVL	m_g0(BX), BX
+	CMPL	DX, BX
+	JEQ	g0
+
+	// switch to the g0 stack
+	get_tls(BP)
+	MOVL	BX, g(BP)
+	MOVL	(g_sched+gobuf_sp)(BX), DI
+	// make room for sighandler arguments
+	// and re-save old SP for restoring later.
+	// (note that the 36(DI) here must match the 36(SP) above.)
+	SUBL	$40, DI
+	MOVL	SP, 36(DI)
+	MOVL	DI, SP
+
+g0:
+	MOVL	0(CX), BX // ExceptionRecord*
+	MOVL	4(CX), CX // Context*
+	MOVL	BX, 0(SP)
+	MOVL	CX, 4(SP)
+	MOVL	DX, 8(SP)
+	CALL	SI	// call handler
+	// AX is set to report result back to Windows
+	MOVL	12(SP), AX
+
+	// switch back to original stack and g
+	// no-op if we never left.
+	MOVL	36(SP), SP
+	MOVL	32(SP), DX	// note: different SP
+	get_tls(BP)
+	MOVL	DX, g(BP)
+
+done:
+	// restore callee-saved registers
+	MOVL	24(SP), DI
+	MOVL	20(SP), SI
+	MOVL	16(SP), BP
+	MOVL	28(SP), BX
+
+	ADDL	$40, SP
+	// RET 4 (return and pop 4 bytes parameters)
+	BYTE $0xC2; WORD $4
+	RET // unreached; make assembler happy
+
+TEXT runtime·exceptiontramp(SB),NOSPLIT,$0
+	MOVL	$runtime·exceptionhandler(SB), AX
+	JMP	sigtramp<>(SB)
+
+TEXT runtime·firstcontinuetramp(SB),NOSPLIT,$0-0
+	// is never called
+	INT	$3
+
+TEXT runtime·lastcontinuetramp(SB),NOSPLIT,$0-0
+	MOVL	$runtime·lastcontinuehandler(SB), AX
+	JMP	sigtramp<>(SB)
+
+GLOBL runtime·cbctxts(SB), NOPTR, $4
+
+TEXT runtime·callbackasm1(SB),NOSPLIT,$0
+  	MOVL	0(SP), AX	// will use to find our callback context
+
+	// remove return address from stack, we are not returning to callbackasm, but to its caller.
+	ADDL	$4, SP
+
+	// address to callback parameters into CX
+	LEAL	4(SP), CX
+
+	// save registers as required for windows callback
+	PUSHL	DI
+	PUSHL	SI
+	PUSHL	BP
+	PUSHL	BX
+
+	// Go ABI requires DF flag to be cleared.
+	CLD
+
+	// determine index into runtime·cbs table
+	SUBL	$runtime·callbackasm(SB), AX
+	MOVL	$0, DX
+	MOVL	$5, BX	// divide by 5 because each call instruction in runtime·callbacks is 5 bytes long
+	DIVL	BX
+	SUBL	$1, AX	// subtract 1 because return PC is to the next slot
+
+	// Create a struct callbackArgs on our stack.
+	SUBL	$(12+callbackArgs__size), SP
+	MOVL	AX, (12+callbackArgs_index)(SP)		// callback index
+	MOVL	CX, (12+callbackArgs_args)(SP)		// address of args vector
+	MOVL	$0, (12+callbackArgs_result)(SP)	// result
+	LEAL	12(SP), AX	// AX = &callbackArgs{...}
+
+	// Call cgocallback, which will call callbackWrap(frame).
+	MOVL	$0, 8(SP)	// context
+	MOVL	AX, 4(SP)	// frame (address of callbackArgs)
+	LEAL	·callbackWrap(SB), AX
+	MOVL	AX, 0(SP)	// PC of function to call
+	CALL	runtime·cgocallback(SB)
+
+	// Get callback result.
+	MOVL	(12+callbackArgs_result)(SP), AX
+	// Get popRet.
+	MOVL	(12+callbackArgs_retPop)(SP), CX	// Can't use a callee-save register
+	ADDL	$(12+callbackArgs__size), SP
+
+	// restore registers as required for windows callback
+	POPL	BX
+	POPL	BP
+	POPL	SI
+	POPL	DI
+
+	// remove callback parameters before return (as per Windows spec)
+	POPL	DX
+	ADDL	CX, SP
+	PUSHL	DX
+
+	CLD
+
+	RET
+
+// void tstart(M *newm);
+TEXT tstart<>(SB),NOSPLIT,$0
+	MOVL	newm+0(FP), CX		// m
+	MOVL	m_g0(CX), DX		// g
+
+	// Layout new m scheduler stack on os stack.
+	MOVL	SP, AX
+	MOVL	AX, (g_stack+stack_hi)(DX)
+	SUBL	$(64*1024), AX		// initial stack size (adjusted later)
+	MOVL	AX, (g_stack+stack_lo)(DX)
+	ADDL	$const__StackGuard, AX
+	MOVL	AX, g_stackguard0(DX)
+	MOVL	AX, g_stackguard1(DX)
+
+	// Set up tls.
+	LEAL	m_tls(CX), SI
+	MOVL	SI, 0x14(FS)
+	MOVL	CX, g_m(DX)
+	MOVL	DX, g(SI)
+
+	// Someday the convention will be D is always cleared.
+	CLD
+
+	CALL	runtime·stackcheck(SB)	// clobbers AX,CX
+	CALL	runtime·mstart(SB)
+
+	RET
+
+// uint32 tstart_stdcall(M *newm);
+TEXT runtime·tstart_stdcall(SB),NOSPLIT,$0
+	MOVL	newm+0(FP), BX
+
+	PUSHL	BX
+	CALL	tstart<>(SB)
+	POPL	BX
+
+	// Adjust stack for stdcall to return properly.
+	MOVL	(SP), AX		// save return address
+	ADDL	$4, SP			// remove single parameter
+	MOVL	AX, (SP)		// restore return address
+
+	XORL	AX, AX			// return 0 == success
+
+	RET
+
+// setldt(int entry, int address, int limit)
+TEXT runtime·setldt(SB),NOSPLIT,$0
+	MOVL	base+4(FP), CX
+	MOVL	CX, 0x14(FS)
+	RET
+
+// Runs on OS stack.
+// duration (in -100ns units) is in dt+0(FP).
+// g may be nil.
+TEXT runtime·usleep2(SB),NOSPLIT,$20-4
+	MOVL	dt+0(FP), BX
+	MOVL	$-1, hi-4(SP)
+	MOVL	BX, lo-8(SP)
+	LEAL	lo-8(SP), BX
+	MOVL	BX, ptime-12(SP)
+	MOVL	$0, alertable-16(SP)
+	MOVL	$-1, handle-20(SP)
+	MOVL	SP, BP
+	MOVL	runtime·_NtWaitForSingleObject(SB), AX
+	CALL	AX
+	MOVL	BP, SP
+	RET
+
+// Runs on OS stack.
+// duration (in -100ns units) is in dt+0(FP).
+// g is valid.
+TEXT runtime·usleep2HighRes(SB),NOSPLIT,$36-4
+	MOVL	dt+0(FP), BX
+	MOVL	$-1, hi-4(SP)
+	MOVL	BX, lo-8(SP)
+
+	get_tls(CX)
+	MOVL	g(CX), CX
+	MOVL	g_m(CX), CX
+	MOVL	(m_mOS+mOS_highResTimer)(CX), CX
+	MOVL	CX, saved_timer-12(SP)
+
+	MOVL	$0, fResume-16(SP)
+	MOVL	$0, lpArgToCompletionRoutine-20(SP)
+	MOVL	$0, pfnCompletionRoutine-24(SP)
+	MOVL	$0, lPeriod-28(SP)
+	LEAL	lo-8(SP), BX
+	MOVL	BX, lpDueTime-32(SP)
+	MOVL	CX, hTimer-36(SP)
+	MOVL	SP, BP
+	MOVL	runtime·_SetWaitableTimer(SB), AX
+	CALL	AX
+	MOVL	BP, SP
+
+	MOVL	$0, ptime-28(SP)
+	MOVL	$0, alertable-32(SP)
+	MOVL	saved_timer-12(SP), CX
+	MOVL	CX, handle-36(SP)
+	MOVL	SP, BP
+	MOVL	runtime·_NtWaitForSingleObject(SB), AX
+	CALL	AX
+	MOVL	BP, SP
+
+	RET
+
+// Runs on OS stack.
+TEXT runtime·switchtothread(SB),NOSPLIT,$0
+	MOVL	SP, BP
+	MOVL	runtime·_SwitchToThread(SB), AX
+	CALL	AX
+	MOVL	BP, SP
+	RET
+
+TEXT runtime·nanotime1(SB),NOSPLIT,$0-8
+	CMPB	runtime·useQPCTime(SB), $0
+	JNE	useQPC
+loop:
+	MOVL	(_INTERRUPT_TIME+time_hi1), AX
+	MOVL	(_INTERRUPT_TIME+time_lo), CX
+	MOVL	(_INTERRUPT_TIME+time_hi2), DI
+	CMPL	AX, DI
+	JNE	loop
+
+	// wintime = DI:CX, multiply by 100
+	MOVL	$100, AX
+	MULL	CX
+	IMULL	$100, DI
+	ADDL	DI, DX
+	// wintime*100 = DX:AX
+	MOVL	AX, ret_lo+0(FP)
+	MOVL	DX, ret_hi+4(FP)
+	RET
+useQPC:
+	JMP	runtime·nanotimeQPC(SB)
+	RET