mirror of
https://github.com/golang/go
synced 2024-11-05 16:16:11 -07:00
27 lines
583 B
ArmAsm
27 lines
583 B
ArmAsm
|
// 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 !gccgo
|
||
|
|
|
||
|
|
#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
|