mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-28 11:18:45 +07:00
3ac0f4526d
In an effort to clarify and simplify the annotation of assembly functions in the kernel new macros have been introduced. These replace ENTRY and ENDPROC and also add a new annotation for static functions which previously had no ENTRY equivalent. Update the annotations in the library code to the new macros. Signed-off-by: Mark Brown <broonie@kernel.org> [will: Use SYM_FUNC_START_WEAK_PI] Signed-off-by: Will Deacon <will@kernel.org>
69 lines
1.3 KiB
ArmAsm
69 lines
1.3 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* 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 a kernel buffer (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
|
|
strb \ptr, [\regB], \val
|
|
.endm
|
|
|
|
.macro ldrh1 ptr, regB, val
|
|
uao_user_alternative 9998f, ldrh, ldtrh, \ptr, \regB, \val
|
|
.endm
|
|
|
|
.macro strh1 ptr, regB, val
|
|
strh \ptr, [\regB], \val
|
|
.endm
|
|
|
|
.macro ldr1 ptr, regB, val
|
|
uao_user_alternative 9998f, ldr, ldtr, \ptr, \regB, \val
|
|
.endm
|
|
|
|
.macro str1 ptr, regB, val
|
|
str \ptr, [\regB], \val
|
|
.endm
|
|
|
|
.macro ldp1 ptr, regB, regC, val
|
|
uao_ldp 9998f, \ptr, \regB, \regC, \val
|
|
.endm
|
|
|
|
.macro stp1 ptr, regB, regC, val
|
|
stp \ptr, \regB, [\regC], \val
|
|
.endm
|
|
|
|
end .req x5
|
|
SYM_FUNC_START(__arch_copy_from_user)
|
|
add end, x0, x2
|
|
#include "copy_template.S"
|
|
mov x0, #0 // Nothing to copy
|
|
ret
|
|
SYM_FUNC_END(__arch_copy_from_user)
|
|
EXPORT_SYMBOL(__arch_copy_from_user)
|
|
|
|
.section .fixup,"ax"
|
|
.align 2
|
|
9998: sub x0, end, dst // bytes not copied
|
|
ret
|
|
.previous
|