forked from Minki/linux
caab277b1d
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not see http www gnu org licenses extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 503 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexios Zavras <alexios.zavras@intel.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Enrico Weigelt <info@metux.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190602204653.811534538@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
73 lines
1.4 KiB
ArmAsm
73 lines
1.4 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copy from user space to user space
|
|
*
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
#include <asm/asm-uaccess.h>
|
|
#include <asm/assembler.h>
|
|
#include <asm/cache.h>
|
|
|
|
/*
|
|
* Copy from user space to user space (alignment handled by the hardware)
|
|
*
|
|
* Parameters:
|
|
* x0 - to
|
|
* x1 - from
|
|
* x2 - n
|
|
* Returns:
|
|
* x0 - bytes not copied
|
|
*/
|
|
.macro ldrb1 ptr, regB, val
|
|
uao_user_alternative 9998f, ldrb, ldtrb, \ptr, \regB, \val
|
|
.endm
|
|
|
|
.macro strb1 ptr, regB, val
|
|
uao_user_alternative 9998f, strb, sttrb, \ptr, \regB, \val
|
|
.endm
|
|
|
|
.macro ldrh1 ptr, regB, val
|
|
uao_user_alternative 9998f, ldrh, ldtrh, \ptr, \regB, \val
|
|
.endm
|
|
|
|
.macro strh1 ptr, regB, val
|
|
uao_user_alternative 9998f, strh, sttrh, \ptr, \regB, \val
|
|
.endm
|
|
|
|
.macro ldr1 ptr, regB, val
|
|
uao_user_alternative 9998f, ldr, ldtr, \ptr, \regB, \val
|
|
.endm
|
|
|
|
.macro str1 ptr, regB, val
|
|
uao_user_alternative 9998f, str, sttr, \ptr, \regB, \val
|
|
.endm
|
|
|
|
.macro ldp1 ptr, regB, regC, val
|
|
uao_ldp 9998f, \ptr, \regB, \regC, \val
|
|
.endm
|
|
|
|
.macro stp1 ptr, regB, regC, val
|
|
uao_stp 9998f, \ptr, \regB, \regC, \val
|
|
.endm
|
|
|
|
end .req x5
|
|
|
|
ENTRY(__arch_copy_in_user)
|
|
uaccess_enable_not_uao x3, x4, x5
|
|
add end, x0, x2
|
|
#include "copy_template.S"
|
|
uaccess_disable_not_uao x3, x4
|
|
mov x0, #0
|
|
ret
|
|
ENDPROC(__arch_copy_in_user)
|
|
EXPORT_SYMBOL(__arch_copy_in_user)
|
|
|
|
.section .fixup,"ax"
|
|
.align 2
|
|
9998: sub x0, end, dst // bytes not copied
|
|
ret
|
|
.previous
|