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>
43 lines
896 B
ArmAsm
43 lines
896 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* linux/arch/unicore32/lib/strncpy_from_user.S
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*
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* Code specific to PKUnity SoC and UniCore ISA
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*
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* Copyright (C) 2001-2010 GUAN Xue-tao
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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/errno.h>
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.text
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.align 5
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/*
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* Copy a string from user space to kernel space.
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* r0 = dst, r1 = src, r2 = byte length
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* returns the number of characters copied (strlen of copied string),
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* -EFAULT on exception, or "len" if we fill the whole buffer
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*/
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ENTRY(__strncpy_from_user)
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mov ip, r1
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1: sub.a r2, r2, #1
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ldrusr r3, r1, 1, ns
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bfs 2f
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stb.w r3, [r0]+, #1
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cxor.a r3, #0
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bne 1b
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sub r1, r1, #1 @ take NUL character out of count
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2: sub r0, r1, ip
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mov pc, lr
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ENDPROC(__strncpy_from_user)
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.pushsection .fixup,"ax"
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.align 0
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9001: mov r3, #0
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stb r3, [r0+], #0 @ null terminate
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mov r0, #-EFAULT
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mov pc, lr
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.popsection
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