From ada66f1837594f38bc2db4f98c4c6589ecc8a7f6 Mon Sep 17 00:00:00 2001 From: Catalin Marinas Date: Wed, 29 Apr 2020 19:37:02 +0100 Subject: [PATCH] arm64: Reorder the macro arguments in the copy routines The current argument order is obviously buggy (memcpy.S): macro strb1 ptr, regB, val strb \ptr, [\regB], \val endm However, it cancels out as the calling sites in copy_template.S pass the address as the regB argument. Mechanically reorder the arguments to match the instruction mnemonics. There is no difference in objdump before and after this patch. Signed-off-by: Catalin Marinas Link: https://lore.kernel.org/r/20200429183702.28445-1-catalin.marinas@arm.com Signed-off-by: Will Deacon --- arch/arm64/lib/copy_from_user.S | 32 ++++++++++++++++---------------- arch/arm64/lib/copy_in_user.S | 32 ++++++++++++++++---------------- arch/arm64/lib/copy_to_user.S | 32 ++++++++++++++++---------------- arch/arm64/lib/memcpy.S | 32 ++++++++++++++++---------------- 4 files changed, 64 insertions(+), 64 deletions(-) diff --git a/arch/arm64/lib/copy_from_user.S b/arch/arm64/lib/copy_from_user.S index 8e25e89ad01f..0f8a3a9e3795 100644 --- a/arch/arm64/lib/copy_from_user.S +++ b/arch/arm64/lib/copy_from_user.S @@ -20,36 +20,36 @@ * x0 - bytes not copied */ - .macro ldrb1 ptr, regB, val - uao_user_alternative 9998f, ldrb, ldtrb, \ptr, \regB, \val + .macro ldrb1 reg, ptr, val + uao_user_alternative 9998f, ldrb, ldtrb, \reg, \ptr, \val .endm - .macro strb1 ptr, regB, val - strb \ptr, [\regB], \val + .macro strb1 reg, ptr, val + strb \reg, [\ptr], \val .endm - .macro ldrh1 ptr, regB, val - uao_user_alternative 9998f, ldrh, ldtrh, \ptr, \regB, \val + .macro ldrh1 reg, ptr, val + uao_user_alternative 9998f, ldrh, ldtrh, \reg, \ptr, \val .endm - .macro strh1 ptr, regB, val - strh \ptr, [\regB], \val + .macro strh1 reg, ptr, val + strh \reg, [\ptr], \val .endm - .macro ldr1 ptr, regB, val - uao_user_alternative 9998f, ldr, ldtr, \ptr, \regB, \val + .macro ldr1 reg, ptr, val + uao_user_alternative 9998f, ldr, ldtr, \reg, \ptr, \val .endm - .macro str1 ptr, regB, val - str \ptr, [\regB], \val + .macro str1 reg, ptr, val + str \reg, [\ptr], \val .endm - .macro ldp1 ptr, regB, regC, val - uao_ldp 9998f, \ptr, \regB, \regC, \val + .macro ldp1 reg1, reg2, ptr, val + uao_ldp 9998f, \reg1, \reg2, \ptr, \val .endm - .macro stp1 ptr, regB, regC, val - stp \ptr, \regB, [\regC], \val + .macro stp1 reg1, reg2, ptr, val + stp \reg1, \reg2, [\ptr], \val .endm end .req x5 diff --git a/arch/arm64/lib/copy_in_user.S b/arch/arm64/lib/copy_in_user.S index 667139013ed1..80e37ada0ee1 100644 --- a/arch/arm64/lib/copy_in_user.S +++ b/arch/arm64/lib/copy_in_user.S @@ -21,36 +21,36 @@ * Returns: * x0 - bytes not copied */ - .macro ldrb1 ptr, regB, val - uao_user_alternative 9998f, ldrb, ldtrb, \ptr, \regB, \val + .macro ldrb1 reg, ptr, val + uao_user_alternative 9998f, ldrb, ldtrb, \reg, \ptr, \val .endm - .macro strb1 ptr, regB, val - uao_user_alternative 9998f, strb, sttrb, \ptr, \regB, \val + .macro strb1 reg, ptr, val + uao_user_alternative 9998f, strb, sttrb, \reg, \ptr, \val .endm - .macro ldrh1 ptr, regB, val - uao_user_alternative 9998f, ldrh, ldtrh, \ptr, \regB, \val + .macro ldrh1 reg, ptr, val + uao_user_alternative 9998f, ldrh, ldtrh, \reg, \ptr, \val .endm - .macro strh1 ptr, regB, val - uao_user_alternative 9998f, strh, sttrh, \ptr, \regB, \val + .macro strh1 reg, ptr, val + uao_user_alternative 9998f, strh, sttrh, \reg, \ptr, \val .endm - .macro ldr1 ptr, regB, val - uao_user_alternative 9998f, ldr, ldtr, \ptr, \regB, \val + .macro ldr1 reg, ptr, val + uao_user_alternative 9998f, ldr, ldtr, \reg, \ptr, \val .endm - .macro str1 ptr, regB, val - uao_user_alternative 9998f, str, sttr, \ptr, \regB, \val + .macro str1 reg, ptr, val + uao_user_alternative 9998f, str, sttr, \reg, \ptr, \val .endm - .macro ldp1 ptr, regB, regC, val - uao_ldp 9998f, \ptr, \regB, \regC, \val + .macro ldp1 reg1, reg2, ptr, val + uao_ldp 9998f, \reg1, \reg2, \ptr, \val .endm - .macro stp1 ptr, regB, regC, val - uao_stp 9998f, \ptr, \regB, \regC, \val + .macro stp1 reg1, reg2, ptr, val + uao_stp 9998f, \reg1, \reg2, \ptr, \val .endm end .req x5 diff --git a/arch/arm64/lib/copy_to_user.S b/arch/arm64/lib/copy_to_user.S index 1a104d0089f3..4ec59704b8f2 100644 --- a/arch/arm64/lib/copy_to_user.S +++ b/arch/arm64/lib/copy_to_user.S @@ -19,36 +19,36 @@ * Returns: * x0 - bytes not copied */ - .macro ldrb1 ptr, regB, val - ldrb \ptr, [\regB], \val + .macro ldrb1 reg, ptr, val + ldrb \reg, [\ptr], \val .endm - .macro strb1 ptr, regB, val - uao_user_alternative 9998f, strb, sttrb, \ptr, \regB, \val + .macro strb1 reg, ptr, val + uao_user_alternative 9998f, strb, sttrb, \reg, \ptr, \val .endm - .macro ldrh1 ptr, regB, val - ldrh \ptr, [\regB], \val + .macro ldrh1 reg, ptr, val + ldrh \reg, [\ptr], \val .endm - .macro strh1 ptr, regB, val - uao_user_alternative 9998f, strh, sttrh, \ptr, \regB, \val + .macro strh1 reg, ptr, val + uao_user_alternative 9998f, strh, sttrh, \reg, \ptr, \val .endm - .macro ldr1 ptr, regB, val - ldr \ptr, [\regB], \val + .macro ldr1 reg, ptr, val + ldr \reg, [\ptr], \val .endm - .macro str1 ptr, regB, val - uao_user_alternative 9998f, str, sttr, \ptr, \regB, \val + .macro str1 reg, ptr, val + uao_user_alternative 9998f, str, sttr, \reg, \ptr, \val .endm - .macro ldp1 ptr, regB, regC, val - ldp \ptr, \regB, [\regC], \val + .macro ldp1 reg1, reg2, ptr, val + ldp \reg1, \reg2, [\ptr], \val .endm - .macro stp1 ptr, regB, regC, val - uao_stp 9998f, \ptr, \regB, \regC, \val + .macro stp1 reg1, reg2, ptr, val + uao_stp 9998f, \reg1, \reg2, \ptr, \val .endm end .req x5 diff --git a/arch/arm64/lib/memcpy.S b/arch/arm64/lib/memcpy.S index 9f382adfa88a..e0bf83d556f2 100644 --- a/arch/arm64/lib/memcpy.S +++ b/arch/arm64/lib/memcpy.S @@ -24,36 +24,36 @@ * Returns: * x0 - dest */ - .macro ldrb1 ptr, regB, val - ldrb \ptr, [\regB], \val + .macro ldrb1 reg, ptr, val + ldrb \reg, [\ptr], \val .endm - .macro strb1 ptr, regB, val - strb \ptr, [\regB], \val + .macro strb1 reg, ptr, val + strb \reg, [\ptr], \val .endm - .macro ldrh1 ptr, regB, val - ldrh \ptr, [\regB], \val + .macro ldrh1 reg, ptr, val + ldrh \reg, [\ptr], \val .endm - .macro strh1 ptr, regB, val - strh \ptr, [\regB], \val + .macro strh1 reg, ptr, val + strh \reg, [\ptr], \val .endm - .macro ldr1 ptr, regB, val - ldr \ptr, [\regB], \val + .macro ldr1 reg, ptr, val + ldr \reg, [\ptr], \val .endm - .macro str1 ptr, regB, val - str \ptr, [\regB], \val + .macro str1 reg, ptr, val + str \reg, [\ptr], \val .endm - .macro ldp1 ptr, regB, regC, val - ldp \ptr, \regB, [\regC], \val + .macro ldp1 reg1, reg2, ptr, val + ldp \reg1, \reg2, [\ptr], \val .endm - .macro stp1 ptr, regB, regC, val - stp \ptr, \regB, [\regC], \val + .macro stp1 reg1, reg2, ptr, val + stp \reg1, \reg2, [\ptr], \val .endm .weak memcpy -- 2.11.0