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4260415f6a
/tmp/ccJ3ssZW.s: Assembler messages:
/tmp/ccJ3ssZW.s:1952: Error: can't resolve `.text' {.text section} - `.LFB1077'
This is caused because:
.section .data
.section .text
.section .text
.previous
does not return us to the .text section, but the .data section; this
makes use of .previous dangerous if the ordering of previous sections
is not known.
Fix up the other users of .previous; .pushsection and .popsection are
a safer pairing to use than .section and .previous.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
44 lines
981 B
ArmAsm
44 lines
981 B
ArmAsm
/*
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* linux/arch/arm/lib/strncpy_from_user.S
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*
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* Copyright (C) 1995-2000 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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: subs r2, r2, #1
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ldrusr r3, r1, 1, pl
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bmi 2f
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strb r3, [r0], #1
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teq 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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strb 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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