linux-kernel - Re: [PATCH 4/4] scripts/checkstack.pl: fix arm sp regex

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Date:   Thu, 7 May 2020 19:38:51 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Maninder Singh <maninder1.s@...sung.com>
Cc:     "George G. Davis" <george_davis@...tor.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        a.sahrawat@...sung.com, Vaneet Narang <v.narang@...sung.com>
Subject: Re: [PATCH 4/4] scripts/checkstack.pl: fix arm sp regex

On Thu, Apr 30, 2020 at 9:50 PM Maninder Singh <maninder1.s@...sung.com> wrote:
>
> if objdump has below entries;
> c01ed608 <X>:
> c01ed614:       e24ddff7        sub     sp, sp, #120    ; 0x78
>
> c01f0d50 <Y>:
> c01f0d50:       e24dd094        sub     sp, sp, #140    ; 0x8c
>
> scripts fails to read stack usage.
> so making regex $re for ARM similar to aarch64
>
> Signed-off-by: Vaneet Narang <v.narang@...sung.com>
> Signed-off-by: Maninder Singh <maninder1.s@...sung.com>


This looks good to me, and it is a bug fix.

Just a question about the SOB.


Maninder Singh is the author and also the submitter, right?

What does "Signed-off-by: Vaneet Narang <v.narang@...sung.com>" mean?

Co-developed-by or something else?






> ---
>  scripts/checkstack.pl | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
> index b292ef4..e80de70 100755
> --- a/scripts/checkstack.pl
> +++ b/scripts/checkstack.pl
> @@ -60,7 +60,7 @@ my (@stack, $re, $dre, $sub, $x, $xs, $funcre, $min_stack);
>                 $dre = qr/^.*sub.*sp, sp, #(0x$x{1,8})/o;
>         } elsif ($arch eq 'arm') {
>                 #c0008ffc:      e24dd064        sub     sp, sp, #100    ; 0x64
> -               $re = qr/.*sub.*sp, sp, #(([0-9]{2}|[3-9])[0-9]{2})/o;
> +               $re = qr/.*sub.*sp, sp, #([0-9]{1,4})/o;
>                 $sub = \&arm_push_handling;
>         } elsif ($arch =~ /^x86(_64)?$/ || $arch =~ /^i[3456]86$/) {
>                 #c0105234:       81 ec ac 05 00 00       sub    $0x5ac,%esp
> --
> 1.9.1
>


-- 
Best Regards
Masahiro Yamada