mirror of
https://github.com/torvalds/linux
synced 2026-07-23 02:30:46 +09:00
7eda356658
strncpy() has no remaining callers in the kernel[1]. Remove the powerpc-specific assembly implementation from both the kernel (arch/powerpc/lib/string.S) and the boot wrapper (arch/powerpc/boot/string.S), along with the __HAVE_ARCH_STRNCPY define and declaration, falling back to the generic version in lib/string.c. The boot wrapper's strncpy had no callers in arch/powerpc/boot/. Link: https://github.com/KSPP/linux/issues/90 [1] Signed-off-by: Kees Cook <kees@kernel.org>
44 lines
647 B
ArmAsm
44 lines
647 B
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* String handling functions for PowerPC.
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*
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* Copyright (C) 1996 Paul Mackerras.
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*/
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#include <linux/export.h>
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#include <asm/ppc_asm.h>
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#include <asm/cache.h>
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.text
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_GLOBAL(strncmp)
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PPC_LCMPI 0,r5,0
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beq- 2f
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mtctr r5
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addi r5,r3,-1
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addi r4,r4,-1
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.balign IFETCH_ALIGN_BYTES
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1: lbzu r3,1(r5)
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cmpwi 1,r3,0
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lbzu r0,1(r4)
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subf. r3,r0,r3
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beqlr 1
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bdnzt eq,1b
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blr
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2: li r3,0
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blr
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EXPORT_SYMBOL(strncmp)
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_GLOBAL(memchr)
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PPC_LCMPI 0,r5,0
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beq- 2f
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mtctr r5
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addi r3,r3,-1
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.balign IFETCH_ALIGN_BYTES
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1: lbzu r0,1(r3)
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cmpw 0,r0,r4
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bdnzf 2,1b
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beqlr
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2: li r3,0
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blr
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EXPORT_SYMBOL(memchr)
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