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go/misc/cgo/test/testdata/issue9400/asm_s390x.s

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misc/cgo/test: add RewindAndSetgid implementation for s390x Required to pass the issue9400 test. Change-Id: I595223c403b12faade54e2e46510f8537150af39 Reviewed-on: https://go-review.googlesource.com/20940 Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-03-20 20:00:06 -06:00
// 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.
all: use more precise build tags s/!gccgo/gc/ in files which use gc-syntax assembly. Change-Id: Ifdadb62edd1210ebc70e7cd415648b752afaf067 Reviewed-on: https://go-review.googlesource.com/c/go/+/269957 Reviewed-by: Than McIntosh <thanm@google.com> Trust: David Chase <drchase@google.com> Trust: Matthew Dempsky <mdempsky@google.com>
2020-11-12 15:42:58 -07:00
// +build gc
misc/cgo/test: add RewindAndSetgid implementation for s390x Required to pass the issue9400 test. Change-Id: I595223c403b12faade54e2e46510f8537150af39 Reviewed-on: https://go-review.googlesource.com/20940 Reviewed-by: Ian Lance Taylor <iant@golang.org> Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
2016-03-20 20:00:06 -06:00
#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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