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ec9d78070d
Commit39d114ddc6("arm64: add KASAN support") added .weak directives to arch/arm64/lib/mem*.S instead of changing the existing SYM_FUNC_START_PI macros. This can lead to the assembly snippet `.weak memcpy ... .globl memcpy` which will produce a STB_WEAK memcpy with GNU as but STB_GLOBAL memcpy with LLVM's integrated assembler before LLVM 12. LLVM 12 (since https://reviews.llvm.org/D90108) will error on such an overridden symbol binding. Use the appropriate SYM_FUNC_START_WEAK_PI instead. Fixes:39d114ddc6("arm64: add KASAN support") Reported-by: Sami Tolvanen <samitolvanen@google.com> Signed-off-by: Fangrui Song <maskray@google.com> Tested-by: Sami Tolvanen <samitolvanen@google.com> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Cc: <stable@vger.kernel.org> Link: https://lore.kernel.org/r/20201029181951.1866093-1-maskray@google.com Signed-off-by: Will Deacon <will@kernel.org>
67 lines
1.2 KiB
ArmAsm
67 lines
1.2 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2013 ARM Ltd.
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* Copyright (C) 2013 Linaro.
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*
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* This code is based on glibc cortex strings work originally authored by Linaro
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* be found @
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*
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* http://bazaar.launchpad.net/~linaro-toolchain-dev/cortex-strings/trunk/
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* files/head:/src/aarch64/
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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/cache.h>
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/*
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* Copy a buffer from src to dest (alignment handled by the hardware)
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*
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* Parameters:
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* x0 - dest
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* x1 - src
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* x2 - n
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* Returns:
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* x0 - dest
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*/
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.macro ldrb1 reg, ptr, val
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ldrb \reg, [\ptr], \val
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.endm
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.macro strb1 reg, ptr, val
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strb \reg, [\ptr], \val
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.endm
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.macro ldrh1 reg, ptr, val
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ldrh \reg, [\ptr], \val
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.endm
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.macro strh1 reg, ptr, val
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strh \reg, [\ptr], \val
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.endm
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.macro ldr1 reg, ptr, val
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ldr \reg, [\ptr], \val
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.endm
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.macro str1 reg, ptr, val
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str \reg, [\ptr], \val
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.endm
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.macro ldp1 reg1, reg2, ptr, val
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ldp \reg1, \reg2, [\ptr], \val
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.endm
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.macro stp1 reg1, reg2, ptr, val
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stp \reg1, \reg2, [\ptr], \val
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.endm
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SYM_FUNC_START_ALIAS(__memcpy)
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SYM_FUNC_START_WEAK_PI(memcpy)
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#include "copy_template.S"
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ret
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SYM_FUNC_END_PI(memcpy)
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EXPORT_SYMBOL(memcpy)
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SYM_FUNC_END_ALIAS(__memcpy)
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EXPORT_SYMBOL(__memcpy)
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