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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.
#include "zasm_GOOS_GOARCH.h"
// void runtime·asmstdcall(void *c);
TEXT runtime·asmstdcall(SB),7,$0
MOVL c+0(FP), BX
// SetLastError(0).
MOVL $0, 0x34(FS)
// Copy args to the stack.
MOVL SP, BP
MOVL wincall_n(BX), CX // words
MOVL CX, AX
SALL $2, AX
SUBL AX, SP // room for args
MOVL SP, DI
MOVL wincall_args(BX), SI
CLD
REP; MOVSL
// Call stdcall or cdecl function.
// DI SI BP BX are preserved, SP is not
CALL wincall_fn(BX)
MOVL BP, SP
// Return result.
MOVL c+0(FP), BX
MOVL AX, wincall_r1(BX)
MOVL DX, wincall_r2(BX)
// GetLastError().
MOVL 0x34(FS), AX
MOVL AX, wincall_err(BX)
RET
TEXT runtime·badcallback(SB),7,$24
// stderr
MOVL $-12, 0(SP)
MOVL SP, BP
CALL *runtime·GetStdHandle(SB)
MOVL BP, SP
MOVL AX, 0(SP) // handle
MOVL $runtime·badcallbackmsg(SB), DX // pointer
MOVL DX, 4(SP)
MOVL runtime·badcallbacklen(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)
MOVL BP, SI
RET
TEXT runtime·badsignal(SB),7,$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)
MOVL BP, SI
RET
// faster get/set last error
TEXT runtime·getlasterror(SB),7,$0
MOVL 0x34(FS), AX
RET
TEXT runtime·setlasterror(SB),7,$0
MOVL err+0(FP), AX
MOVL AX, 0x34(FS)
RET
TEXT runtime·sigtramp(SB),7,$28
// unwinding?
MOVL info+0(FP), CX
TESTL $6, 4(CX) // exception flags
MOVL $1, AX
JNZ sigdone
// copy arguments for call to sighandler
MOVL CX, 0(SP)
MOVL context+8(FP), CX
MOVL CX, 4(SP)
get_tls(CX)
// check that m exists
MOVL m(CX), AX
CMPL AX, $0
JNE 2(PC)
CALL runtime·badsignal(SB)
MOVL g(CX), CX
MOVL CX, 8(SP)
MOVL BX, 12(SP)
MOVL BP, 16(SP)
MOVL SI, 20(SP)
MOVL DI, 24(SP)
CALL runtime·sighandler(SB)
// AX is set to report result back to Windows
MOVL 24(SP), DI
MOVL 20(SP), SI
MOVL 16(SP), BP
MOVL 12(SP), BX
sigdone:
RET
TEXT runtime·ctrlhandler(SB),7,$0
PUSHL $runtime·ctrlhandler1(SB)
CALL runtime·externalthreadhandler(SB)
MOVL 4(SP), CX
ADDL $12, SP
JMP CX
TEXT runtime·profileloop(SB),7,$0
PUSHL $runtime·profileloop1(SB)
CALL runtime·externalthreadhandler(SB)
MOVL 4(SP), CX
ADDL $12, SP
JMP CX
TEXT runtime·externalthreadhandler(SB),7,$0
PUSHL BP
MOVL SP, BP
PUSHL BX
PUSHL SI
PUSHL DI
PUSHL 0x14(FS)
MOVL SP, DX
// setup dummy m, g
SUBL $m_end, SP // space for M
MOVL SP, 0(SP)
MOVL $m_end, 4(SP)
CALL runtime·memclr(SB) // smashes AX,BX,CX
LEAL m_tls(SP), CX
MOVL CX, 0x14(FS)
MOVL SP, m(CX)
MOVL SP, BX
SUBL $g_end, SP // space for G
MOVL SP, g(CX)
MOVL SP, m_g0(BX)
MOVL SP, 0(SP)
MOVL $g_end, 4(SP)
CALL runtime·memclr(SB) // smashes AX,BX,CX
LEAL -4096(SP), CX
MOVL CX, g_stackguard(SP)
MOVL DX, g_stackbase(SP)
PUSHL 16(BP) // arg for handler
CALL 8(BP)
POPL CX
get_tls(CX)
MOVL g(CX), CX
MOVL g_stackbase(CX), SP
POPL 0x14(FS)
POPL DI
POPL SI
POPL BX
POPL BP
RET
// Called from dynamic function created by ../thread.c compilecallback,
// running on Windows stack (not Go stack).
// BX, BP, SI, DI registers and DF flag are preserved
// as required by windows callback convention.
// AX = address of go func we need to call
// DX = total size of arguments
//
TEXT runtime·callbackasm+0(SB),7,$0
// preserve whatever's at the memory location that
// the callback will use to store the return value
LEAL 8(SP), CX
PUSHL 0(CX)(DX*1)
ADDL $4, DX // extend argsize by size of return value
// save registers as required for windows callback
PUSHL DI
PUSHL SI
PUSHL BP
PUSHL BX
// set up SEH frame again
PUSHL $runtime·sigtramp(SB)
PUSHL 0(FS)
MOVL SP, 0(FS)
// callback parameters
PUSHL DX
PUSHL CX
PUSHL AX
CLD
CALL runtime·cgocallback_gofunc(SB)
POPL AX
POPL CX
POPL DX
// pop SEH frame
POPL 0(FS)
POPL BX
// restore registers as required for windows callback
POPL BX
POPL BP
POPL SI
POPL DI
CLD
MOVL -4(CX)(DX*1), AX
POPL -4(CX)(DX*1)
RET
// void tstart(M *newm);
TEXT runtime·tstart(SB),7,$0
MOVL newm+4(SP), CX // m
MOVL m_g0(CX), DX // g
// Layout new m scheduler stack on os stack.
MOVL SP, AX
MOVL AX, g_stackbase(DX)
SUBL $(64*1024), AX // stack size
MOVL AX, g_stackguard(DX)
// Set up tls.
LEAL m_tls(CX), SI
MOVL SI, 0x14(FS)
MOVL CX, m(SI)
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),7,$0
MOVL newm+4(SP), BX
PUSHL BX
CALL runtime·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),7,$0
MOVL address+4(FP), CX
MOVL CX, 0x14(FS)
RET
// void install_exception_handler()
TEXT runtime·install_exception_handler(SB),7,$0
get_tls(CX)
MOVL m(CX), CX // m
// Set up SEH frame
MOVL m_seh(CX), DX
MOVL $runtime·sigtramp(SB), AX
MOVL AX, seh_handler(DX)
MOVL 0(FS), AX
MOVL AX, seh_prev(DX)
// Install it
MOVL DX, 0(FS)
RET
// void remove_exception_handler()
TEXT runtime·remove_exception_handler(SB),7,$0
get_tls(CX)
MOVL m(CX), CX // m
// Remove SEH frame
MOVL m_seh(CX), DX
MOVL seh_prev(DX), AX
MOVL AX, 0(FS)
RET
TEXT runtime·osyield(SB),7,$20
// Tried NtYieldExecution but it doesn't yield hard enough.
// NtWaitForSingleObject being used here as Sleep(0).
MOVL runtime·NtWaitForSingleObject(SB), AX
MOVL $-1, hi-4(SP)
MOVL $-1, 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
CALL checkstack4<>(SB)
CALL AX
MOVL BP, SP
RET
TEXT runtime·usleep(SB),7,$20
MOVL runtime·NtWaitForSingleObject(SB), AX
// Have 1us units; need negative 100ns units.
// Assume multiply by 10 will not overflow 32-bit word.
MOVL usec+0(FP), BX
IMULL $10, BX
NEGL 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
CALL checkstack4<>(SB)
CALL AX
MOVL BP, SP
RET
// This function requires 4 bytes of stack,
// to simulate what calling NtWaitForSingleObject will use.
// (It is just a CALL to the system call dispatch.)
// If the linker okays the call to checkstack4 (a NOSPLIT function)
// then the call to NtWaitForSingleObject is okay too.
TEXT checkstack4<>(SB),7,$4
RET
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