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d2912cb15b
Based on 2 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 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 # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
129 lines
2.4 KiB
ArmAsm
129 lines
2.4 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* linux/arch/arm/lib/copy_to_user.S
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*
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* Author: Nicolas Pitre
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* Created: Sep 29, 2005
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* Copyright: MontaVista Software, Inc.
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*/
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#include <linux/linkage.h>
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#include <asm/assembler.h>
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#include <asm/unwind.h>
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/*
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* Prototype:
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*
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* size_t arm_copy_to_user(void *to, const void *from, size_t n)
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*
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* Purpose:
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*
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* copy a block to user memory from kernel memory
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*
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* Params:
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*
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* to = user memory
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* from = kernel memory
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* n = number of bytes to copy
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*
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* Return value:
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*
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* Number of bytes NOT copied.
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*/
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#define LDR1W_SHIFT 0
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.macro ldr1w ptr reg abort
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W(ldr) \reg, [\ptr], #4
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.endm
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.macro ldr4w ptr reg1 reg2 reg3 reg4 abort
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ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4}
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.endm
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.macro ldr8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
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ldmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8}
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.endm
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.macro ldr1b ptr reg cond=al abort
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ldrb\cond \reg, [\ptr], #1
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.endm
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#ifdef CONFIG_CPU_USE_DOMAINS
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#ifndef CONFIG_THUMB2_KERNEL
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#define STR1W_SHIFT 0
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#else
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#define STR1W_SHIFT 1
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#endif
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.macro str1w ptr reg abort
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strusr \reg, \ptr, 4, abort=\abort
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.endm
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.macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
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str1w \ptr, \reg1, \abort
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str1w \ptr, \reg2, \abort
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str1w \ptr, \reg3, \abort
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str1w \ptr, \reg4, \abort
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str1w \ptr, \reg5, \abort
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str1w \ptr, \reg6, \abort
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str1w \ptr, \reg7, \abort
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str1w \ptr, \reg8, \abort
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.endm
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#else
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#define STR1W_SHIFT 0
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.macro str1w ptr reg abort
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USERL(\abort, W(str) \reg, [\ptr], #4)
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.endm
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.macro str8w ptr reg1 reg2 reg3 reg4 reg5 reg6 reg7 reg8 abort
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USERL(\abort, stmia \ptr!, {\reg1, \reg2, \reg3, \reg4, \reg5, \reg6, \reg7, \reg8})
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.endm
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#endif /* CONFIG_CPU_USE_DOMAINS */
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.macro str1b ptr reg cond=al abort
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strusr \reg, \ptr, 1, \cond, abort=\abort
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.endm
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.macro enter reg1 reg2
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mov r3, #0
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stmdb sp!, {r0, r2, r3, \reg1, \reg2}
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.endm
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.macro usave reg1 reg2
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UNWIND( .save {r0, r2, r3, \reg1, \reg2} )
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.endm
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.macro exit reg1 reg2
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add sp, sp, #8
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ldmfd sp!, {r0, \reg1, \reg2}
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.endm
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.text
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ENTRY(__copy_to_user_std)
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WEAK(arm_copy_to_user)
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#ifdef CONFIG_CPU_SPECTRE
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get_thread_info r3
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ldr r3, [r3, #TI_ADDR_LIMIT]
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uaccess_mask_range_ptr r0, r2, r3, ip
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#endif
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#include "copy_template.S"
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ENDPROC(arm_copy_to_user)
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ENDPROC(__copy_to_user_std)
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.pushsection .text.fixup,"ax"
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.align 0
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copy_abort_preamble
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ldmfd sp!, {r1, r2, r3}
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sub r0, r0, r1
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rsb r0, r0, r2
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copy_abort_end
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.popsection
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