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34 lines
697 B
ArmAsm
34 lines
697 B
ArmAsm
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// Copyright 2016 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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// +build mips64 mips64le
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// +build !gccgo
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#include "textflag.h"
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#define SYNC WORD $0xf
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TEXT ·RewindAndSetgid(SB),NOSPLIT|NOFRAME,$0-0
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// Rewind stack pointer so anything that happens on the stack
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// will clobber the test pattern created by the caller
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ADDV $(1024*8), R29
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// Ask signaller to setgid
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MOVW $1, R1
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SYNC
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MOVW R1, ·Baton(SB)
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SYNC
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// Wait for setgid completion
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loop:
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SYNC
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MOVW ·Baton(SB), R1
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OR R2, R2, R2 // hint that we're in a spin loop
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BNE R1, loop
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SYNC
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// Restore stack
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ADDV $(-1024*8), R29
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RET
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