mirror of
https://github.com/golang/go
synced 2024-10-05 00:11:21 -06:00
b23691148f
It's the best we can do before Go 1. For issue 3250; not a fix but at least less mysterious. R=golang-dev, bradfitz CC=golang-dev https://golang.org/cl/5797068
299 lines
5.4 KiB
ArmAsm
299 lines
5.4 KiB
ArmAsm
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "zasm_GOOS_GOARCH.h"
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// void runtime·asmstdcall(void *c);
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TEXT runtime·asmstdcall(SB),7,$0
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MOVL c+0(FP), BX
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// SetLastError(0).
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MOVL $0, 0x34(FS)
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// Copy args to the stack.
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MOVL SP, BP
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MOVL wincall_n(BX), CX // words
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MOVL CX, AX
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SALL $2, AX
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SUBL AX, SP // room for args
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MOVL SP, DI
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MOVL wincall_args(BX), SI
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CLD
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REP; MOVSL
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// Call stdcall or cdecl function.
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// DI SI BP BX are preserved, SP is not
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CALL wincall_fn(BX)
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MOVL BP, SP
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// Return result.
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MOVL c+0(FP), BX
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MOVL AX, wincall_r1(BX)
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MOVL DX, wincall_r2(BX)
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// GetLastError().
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MOVL 0x34(FS), AX
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MOVL AX, wincall_err(BX)
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RET
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TEXT runtime·badcallback(SB),7,$24
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// stderr
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MOVL $-12, 0(SP)
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MOVL SP, BP
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CALL *runtime·GetStdHandle(SB)
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MOVL BP, SP
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MOVL AX, 0(SP) // handle
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MOVL $runtime·badcallbackmsg(SB), DX // pointer
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MOVL DX, 4(SP)
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MOVL runtime·badcallbacklen(SB), DX // count
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MOVL DX, 8(SP)
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LEAL 20(SP), DX // written count
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MOVL $0, 0(DX)
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MOVL DX, 12(SP)
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MOVL $0, 16(SP) // overlapped
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CALL *runtime·WriteFile(SB)
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MOVL BP, SI
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RET
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TEXT runtime·badsignal(SB),7,$24
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// stderr
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MOVL $-12, 0(SP)
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MOVL SP, BP
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CALL *runtime·GetStdHandle(SB)
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MOVL BP, SP
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MOVL AX, 0(SP) // handle
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MOVL $runtime·badsignalmsg(SB), DX // pointer
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MOVL DX, 4(SP)
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MOVL runtime·badsignallen(SB), DX // count
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MOVL DX, 8(SP)
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LEAL 20(SP), DX // written count
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MOVL $0, 0(DX)
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MOVL DX, 12(SP)
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MOVL $0, 16(SP) // overlapped
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CALL *runtime·WriteFile(SB)
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MOVL BP, SI
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RET
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// faster get/set last error
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TEXT runtime·getlasterror(SB),7,$0
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MOVL 0x34(FS), AX
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RET
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TEXT runtime·setlasterror(SB),7,$0
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MOVL err+0(FP), AX
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MOVL AX, 0x34(FS)
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RET
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TEXT runtime·sigtramp(SB),7,$28
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// unwinding?
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MOVL info+0(FP), CX
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TESTL $6, 4(CX) // exception flags
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MOVL $1, AX
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JNZ sigdone
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// copy arguments for call to sighandler
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MOVL CX, 0(SP)
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MOVL context+8(FP), CX
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MOVL CX, 4(SP)
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get_tls(CX)
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// check that m exists
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MOVL m(CX), AX
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CMPL AX, $0
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JNE 2(PC)
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CALL runtime·badsignal(SB)
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MOVL g(CX), CX
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MOVL CX, 8(SP)
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MOVL BX, 12(SP)
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MOVL BP, 16(SP)
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MOVL SI, 20(SP)
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MOVL DI, 24(SP)
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CALL runtime·sighandler(SB)
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// AX is set to report result back to Windows
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MOVL 24(SP), DI
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MOVL 20(SP), SI
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MOVL 16(SP), BP
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MOVL 12(SP), BX
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sigdone:
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RET
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TEXT runtime·ctrlhandler(SB),7,$0
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PUSHL $runtime·ctrlhandler1(SB)
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CALL runtime·externalthreadhandler(SB)
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MOVL 4(SP), CX
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ADDL $12, SP
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JMP CX
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TEXT runtime·profileloop(SB),7,$0
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PUSHL $runtime·profileloop1(SB)
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CALL runtime·externalthreadhandler(SB)
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MOVL 4(SP), CX
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ADDL $12, SP
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JMP CX
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TEXT runtime·externalthreadhandler(SB),7,$0
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PUSHL BP
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MOVL SP, BP
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PUSHL BX
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PUSHL SI
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PUSHL DI
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PUSHL 0x14(FS)
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MOVL SP, DX
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// setup dummy m, g
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SUBL $m_end, SP // space for M
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MOVL SP, 0(SP)
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MOVL $m_end, 4(SP)
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CALL runtime·memclr(SB) // smashes AX,BX,CX
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LEAL m_tls(SP), CX
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MOVL CX, 0x14(FS)
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MOVL SP, m(CX)
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MOVL SP, BX
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SUBL $g_end, SP // space for G
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MOVL SP, g(CX)
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MOVL SP, m_g0(BX)
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MOVL SP, 0(SP)
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MOVL $g_end, 4(SP)
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CALL runtime·memclr(SB) // smashes AX,BX,CX
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LEAL -4096(SP), CX
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MOVL CX, g_stackguard(SP)
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MOVL DX, g_stackbase(SP)
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PUSHL 16(BP) // arg for handler
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CALL 8(BP)
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POPL CX
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get_tls(CX)
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MOVL g(CX), CX
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MOVL g_stackbase(CX), SP
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POPL 0x14(FS)
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POPL DI
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POPL SI
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POPL BX
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POPL BP
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RET
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// Called from dynamic function created by ../thread.c compilecallback,
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// running on Windows stack (not Go stack).
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// BX, BP, SI, DI registers and DF flag are preserved
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// as required by windows callback convention.
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// AX = address of go func we need to call
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// DX = total size of arguments
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//
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TEXT runtime·callbackasm+0(SB),7,$0
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// preserve whatever's at the memory location that
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// the callback will use to store the return value
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LEAL 8(SP), CX
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PUSHL 0(CX)(DX*1)
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ADDL $4, DX // extend argsize by size of return value
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// save registers as required for windows callback
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PUSHL DI
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PUSHL SI
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PUSHL BP
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PUSHL BX
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// set up SEH frame again
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PUSHL $runtime·sigtramp(SB)
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PUSHL 0(FS)
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MOVL SP, 0(FS)
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// callback parameters
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PUSHL DX
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PUSHL CX
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PUSHL AX
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CLD
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CALL runtime·cgocallback(SB)
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POPL AX
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POPL CX
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POPL DX
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// pop SEH frame
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POPL 0(FS)
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POPL BX
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// restore registers as required for windows callback
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POPL BX
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POPL BP
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POPL SI
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POPL DI
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CLD
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MOVL -4(CX)(DX*1), AX
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POPL -4(CX)(DX*1)
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RET
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// void tstart(M *newm);
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TEXT runtime·tstart(SB),7,$0
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MOVL newm+4(SP), CX // m
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MOVL m_g0(CX), DX // g
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// Set up SEH frame
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PUSHL $runtime·sigtramp(SB)
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PUSHL 0(FS)
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MOVL SP, 0(FS)
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// Layout new m scheduler stack on os stack.
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MOVL SP, AX
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MOVL AX, g_stackbase(DX)
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SUBL $(64*1024), AX // stack size
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MOVL AX, g_stackguard(DX)
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// Set up tls.
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LEAL m_tls(CX), SI
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MOVL SI, 0x14(FS)
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MOVL CX, m(SI)
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MOVL DX, g(SI)
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// Someday the convention will be D is always cleared.
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CLD
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CALL runtime·stackcheck(SB) // clobbers AX,CX
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CALL runtime·mstart(SB)
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// Pop SEH frame
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MOVL 0(FS), SP
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POPL 0(FS)
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POPL CX
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RET
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// uint32 tstart_stdcall(M *newm);
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TEXT runtime·tstart_stdcall(SB),7,$0
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MOVL newm+4(SP), BX
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PUSHL BX
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CALL runtime·tstart(SB)
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POPL BX
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// Adjust stack for stdcall to return properly.
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MOVL (SP), AX // save return address
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ADDL $4, SP // remove single parameter
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MOVL AX, (SP) // restore return address
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XORL AX, AX // return 0 == success
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RET
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// setldt(int entry, int address, int limit)
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TEXT runtime·setldt(SB),7,$0
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MOVL address+4(FP), CX
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MOVL CX, 0x14(FS)
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RET
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