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// Copyright 2016 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.
// +build gc
#include "textflag.h"
TEXT ·RewindAndSetgid(SB),NOSPLIT,$0-0
// Rewind stack pointer so anything that happens on the stack
// will clobber the test pattern created by the caller
ADD $(1024 * 8), R15
// Ask signaller to setgid
MOVD $·Baton(SB), R5
MOVW $1, 0(R5)
// Wait for setgid completion
loop:
SYNC
MOVW ·Baton(SB), R3
CMPBNE R3, $0, loop
// Restore stack
SUB $(1024 * 8), R15
RET
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