linux-kernel - Re: [PATCH] arm64: kvm: Delete duplicated label: in invalid

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <CAKwvOdn35v5LkvhWugfLmK_FjVsd0RdPtBCRSqVaM9EP_1KU7w@mail.gmail.com>
Date:   Mon, 13 Apr 2020 16:37:10 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Fangrui Song <maskray@...gle.com>
Cc:     Linux ARM <linux-arm-kernel@...ts.infradead.org>,
        kvmarm@...ts.cs.columbia.edu, LKML <linux-kernel@...r.kernel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Marc Zyngier <maz@...nel.org>, Will Deacon <will@...nel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH] arm64: kvm: Delete duplicated label: in invalid_vector

On Mon, Apr 13, 2020 at 4:10 PM Fangrui Song <maskray@...gle.com> wrote:
>
> SYM_CODE_START defines \label , so it is redundant to define \label again.
> A redefinition at the same place is accepted by GNU as
> (https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=159fbb6088f17a341bcaaac960623cab881b4981)
> but rejected by the clang integrated assembler.
>
> Fixes: 617a2f392c92 ("arm64: kvm: Annotate assembly using modern annoations")

Thanks for the patch!  I think a more accurate Fixes tag would be:
Fixes: 2b28162cf65a ("arm64: KVM: HYP mode entry points")

With this patch applied, and your other arm64 integrated assembler
patch (https://lore.kernel.org/linux-arm-kernel/20200413033811.75074-1-maskray@google.com/T/#u),
I can now assemble arch/arm64/kvm/.

Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>
Tested-by: Nick Desaulniers <ndesaulniers@...gle.com>

> Link: https://github.com/ClangBuiltLinux/linux/issues/988
> Signed-off-by: Fangrui Song <maskray@...gle.com>
> ---
>  arch/arm64/kvm/hyp/hyp-entry.S | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/arch/arm64/kvm/hyp/hyp-entry.S b/arch/arm64/kvm/hyp/hyp-entry.S
> index c2a13ab3c471..9c5cfb04170e 100644
> --- a/arch/arm64/kvm/hyp/hyp-entry.S
> +++ b/arch/arm64/kvm/hyp/hyp-entry.S
> @@ -198,7 +198,6 @@ SYM_CODE_END(__hyp_panic)
>  .macro invalid_vector  label, target = __hyp_panic
>         .align  2
>  SYM_CODE_START(\label)
> -\label:
>         b \target
>  SYM_CODE_END(\label)
>  .endm
> --
> 2.26.0.110.g2183baf09c-goog
>


-- 
Thanks,
~Nick Desaulniers