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70 lines
1.3 KiB
70 lines
1.3 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/* |
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* Copy from user space to user space |
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* |
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* Copyright (C) 2012 ARM Ltd. |
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*/ |
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#include <linux/linkage.h> |
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#include <asm/asm-uaccess.h> |
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#include <asm/assembler.h> |
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#include <asm/cache.h> |
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/* |
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* Copy from user space to user space (alignment handled by the hardware) |
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* |
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* Parameters: |
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* x0 - to |
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* x1 - from |
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* x2 - n |
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* Returns: |
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* x0 - bytes not copied |
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*/ |
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.macro ldrb1 reg, ptr, val |
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user_ldst 9998f, ldtrb, \reg, \ptr, \val |
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.endm |
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.macro strb1 reg, ptr, val |
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user_ldst 9998f, sttrb, \reg, \ptr, \val |
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.endm |
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.macro ldrh1 reg, ptr, val |
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user_ldst 9998f, ldtrh, \reg, \ptr, \val |
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.endm |
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.macro strh1 reg, ptr, val |
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user_ldst 9998f, sttrh, \reg, \ptr, \val |
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.endm |
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.macro ldr1 reg, ptr, val |
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user_ldst 9998f, ldtr, \reg, \ptr, \val |
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.endm |
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.macro str1 reg, ptr, val |
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user_ldst 9998f, sttr, \reg, \ptr, \val |
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.endm |
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.macro ldp1 reg1, reg2, ptr, val |
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user_ldp 9998f, \reg1, \reg2, \ptr, \val |
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.endm |
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.macro stp1 reg1, reg2, ptr, val |
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user_stp 9998f, \reg1, \reg2, \ptr, \val |
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.endm |
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end .req x5 |
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SYM_FUNC_START(__arch_copy_in_user) |
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add end, x0, x2 |
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#include "copy_template.S" |
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mov x0, #0 |
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ret |
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SYM_FUNC_END(__arch_copy_in_user) |
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EXPORT_SYMBOL(__arch_copy_in_user) |
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.section .fixup,"ax" |
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.align 2 |
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9998: sub x0, end, dst // bytes not copied |
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ret |
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.previous
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