mirror of
https://github.com/golang/go
synced 2024-11-06 08:16:11 -07:00
a046caa1e8
This replaces frame size -4 with the NOFRAME flag in arm assembly. This was automated with: sed -i -e 's/\(^TEXT.*[A-Z]\),\( *\)\$-4/\1|NOFRAME,\2$0/' $(find -name '*_arm.s') Plus three manual comment changes found by: grep '\$-4' $(find -name '*_arm.s') The go binary is identical before and after this change. Change-Id: I0310384d1a584118c41d1cd3a042bb8ea7227ef9 Reviewed-on: https://go-review.googlesource.com/92042 Run-TryBot: Austin Clements <austin@google.com> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Cherry Zhang <cherryyz@google.com>
40 lines
761 B
ArmAsm
40 lines
761 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|NOFRAME,$0-0
|
|
// 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
|