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77 lines
1.2 KiB
ArmAsm
77 lines
1.2 KiB
ArmAsm
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// Copyright 2010 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 "defs.h"
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#include "386/asm.h"
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// setldt(int entry, int address, int limit)
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TEXT setldt(SB),7,$0
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RET
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TEXT write(SB),7,$0
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MOVL $20, AX
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INT $64
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RET
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TEXT exits(SB),7,$0
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MOVL $8, AX
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INT $64
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RET
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TEXT brk_(SB),7,$0
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MOVL $24, AX
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INT $64
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RET
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TEXT plan9_semacquire(SB),7,$0
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MOVL $37, AX
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INT $64
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RET
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TEXT plan9_semrelease(SB),7,$0
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MOVL $38, AX
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INT $64
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RET
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TEXT rfork(SB),7,$0
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MOVL $19, AX // rfork
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INT $64
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// In parent, return.
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CMPL AX, $0
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JEQ 2(PC)
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RET
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// In child on old stack.
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MOVL mm+12(SP), BX // m
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MOVL gg+16(SP), DX // g
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MOVL fn+20(SP), SI // fn
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// set SP to be on the new child stack
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MOVL stack+8(SP), CX
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MOVL CX, SP
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// Initialize m, g.
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get_tls(AX)
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MOVL DX, g(AX)
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MOVL BX, m(AX)
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// Initialize AX from _tos->pid
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MOVL 0xdfffeff8, AX
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MOVL AX, m_procid(BX) // save pid as m->procid
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CALL stackcheck(SB) // smashes AX, CX
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MOVL 0(DX), DX // paranoia; check they are not nil
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MOVL 0(BX), BX
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// more paranoia; check that stack splitting code works
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PUSHAL
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CALL emptyfunc(SB)
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POPAL
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CALL SI // fn()
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CALL exit(SB)
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RET
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