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// Copyright 2014 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 ppc64 ppc64le
// +build !gccgo
#include "textflag.h"
TEXT ·RewindAndSetgid(SB),NOSPLIT|NOFRAME,$0-0
// Rewind stack pointer so anything that happens on the stack
// will clobber the test pattern created by the caller
ADD $(1024 * 8), R1
// Ask signaller to setgid
MOVW $1, R3
SYNC
MOVW R3, ·Baton(SB)
// Wait for setgid completion
loop:
SYNC
MOVW ·Baton(SB), R3
CMP R3, $0
// Hint that we're in a spin loop
OR R1, R1, R1
BNE loop
ISYNC
// Restore stack
SUB $(1024 * 8), R1
RET
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