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30 lines
754 B
ArmAsm
30 lines
754 B
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 "textflag.h"
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// See ../runtime/sys_linux_386.s for the reason why we always use int 0x80
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// instead of the glibc-specific "CALL 0x10(GS)".
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#define INVOKE_SYSCALL INT $0x80
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// func RawVforkSyscall(trap, a1, a2, a3 uintptr) (r1, err uintptr)
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TEXT ·RawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-24
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MOVL trap+0(FP), AX // syscall entry
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MOVL a1+4(FP), BX
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MOVL a2+8(FP), CX
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MOVL a3+12(FP), DX
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POPL SI // preserve return address
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INVOKE_SYSCALL
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PUSHL SI
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CMPL AX, $0xfffff001
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JLS ok
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MOVL $-1, r1+16(FP)
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NEGL AX
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MOVL AX, err+20(FP)
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RET
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ok:
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MOVL AX, r1+16(FP)
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MOVL $0, err+20(FP)
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RET
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