mirror of
https://github.com/golang/go
synced 2024-11-14 20:40:32 -07:00
e2b6cebcd6
This doesn't test much with gccgo, but at least it builds now, and the test does, unsurprisingly, pass. A proper test would require adding assembly files in GCC syntax for all platforms that gccgo supports, which would be infeasible. Also added copyright headers to the asm files. Change-Id: Icea5af29d7d521a0681506ddb617a79705b76d33 Reviewed-on: https://go-review.googlesource.com/9417 Reviewed-by: Minux Ma <minux@golang.org>
40 lines
755 B
ArmAsm
40 lines
755 B
ArmAsm
// 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 !gccgo
|
|
|
|
#include "textflag.h"
|
|
|
|
TEXT cas<>(SB),NOSPLIT,$0
|
|
MOVW $0xffff0fc0, R15 // R15 is PC
|
|
|
|
TEXT ·RewindAndSetgid(SB),NOSPLIT,$-4-0
|
|
// Save link register
|
|
MOVW R14, R4
|
|
|
|
// Rewind stack pointer so anything that happens on the stack
|
|
// will clobber the test pattern created by the caller
|
|
ADD $(1024 * 8), R13
|
|
|
|
// Ask signaller to setgid
|
|
MOVW $·Baton(SB), R2
|
|
storeloop:
|
|
MOVW 0(R2), R0
|
|
MOVW $1, R1
|
|
BL cas<>(SB)
|
|
BCC storeloop
|
|
|
|
// Wait for setgid completion
|
|
loop:
|
|
MOVW $0, R0
|
|
MOVW $0, R1
|
|
BL cas<>(SB)
|
|
BCC loop
|
|
|
|
// Restore stack
|
|
SUB $(1024 * 8), R13
|
|
|
|
MOVW R4, R14
|
|
RET
|