mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-13 11:51:32 +00:00
7b90dc40e3
Now the uaccess primitives use LDTR/STTR unconditionally, the
uao_{ldp,stp,user_alternative} asm macros are misnamed, and have a
redundant argument. Let's remove the redundant argument and rename these
to user_{ldp,stp,ldst} respectively to clean this up.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reviewed-by: Robin Murohy <robin.murphy@arm.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20201202131558.39270-9-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
71 lines
1.3 KiB
ArmAsm
71 lines
1.3 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 reg, ptr, val
|
|
user_ldst 9998f, ldtrb, \reg, \ptr, \val
|
|
.endm
|
|
|
|
.macro strb1 reg, ptr, val
|
|
user_ldst 9998f, sttrb, \reg, \ptr, \val
|
|
.endm
|
|
|
|
.macro ldrh1 reg, ptr, val
|
|
user_ldst 9998f, ldtrh, \reg, \ptr, \val
|
|
.endm
|
|
|
|
.macro strh1 reg, ptr, val
|
|
user_ldst 9998f, sttrh, \reg, \ptr, \val
|
|
.endm
|
|
|
|
.macro ldr1 reg, ptr, val
|
|
user_ldst 9998f, ldtr, \reg, \ptr, \val
|
|
.endm
|
|
|
|
.macro str1 reg, ptr, val
|
|
user_ldst 9998f, sttr, \reg, \ptr, \val
|
|
.endm
|
|
|
|
.macro ldp1 reg1, reg2, ptr, val
|
|
user_ldp 9998f, \reg1, \reg2, \ptr, \val
|
|
.endm
|
|
|
|
.macro stp1 reg1, reg2, ptr, val
|
|
user_stp 9998f, \reg1, \reg2, \ptr, \val
|
|
.endm
|
|
|
|
end .req x5
|
|
|
|
SYM_FUNC_START(__arch_copy_in_user)
|
|
add end, x0, x2
|
|
#include "copy_template.S"
|
|
mov x0, #0
|
|
ret
|
|
SYM_FUNC_END(__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
|