linux-kernel - Re: [PATCH] checkstack: Add loongarch support for scripts/checkstack.pl

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Message-ID: <CAAhV-H4AnfMJYj9Tqcte7wwtYc4orpZPGds4EpDjKrmgSsVO_Q@mail.gmail.com>
Date: Sat, 16 Dec 2023 20:15:06 +0800
From: Huacai Chen <chenhuacai@...nel.org>
To: Youling Tang <youling.tang@...look.com>
Cc: John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>, Andrew Morton <akpm@...ux-foundation.org>, 
	linux-kernel@...r.kernel.org, Youling Tang <tangyouling@...inos.cn>
Subject: Re: [PATCH] checkstack: Add loongarch support for scripts/checkstack.pl

Acked-by: Huacai Chen <chenhuacai@...ngson.cn>

On Sat, Dec 16, 2023 at 2:48 PM Youling Tang <youling.tang@...look.com> wrote:
>
> From: Youling Tang <tangyouling@...inos.cn>
>
> scripts/checkstack.pl lacks support for the loongarch architecture. Add
> support to detect "addi.{w,d} $sp, $sp, -FRAME_SIZE" stack frame generation
> instruction.
>
> Signed-off-by: Youling Tang <tangyouling@...inos.cn>
> ---
>  scripts/checkstack.pl | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
> index f27d552aec43..e9d01b999b74 100755
> --- a/scripts/checkstack.pl
> +++ b/scripts/checkstack.pl
> @@ -16,6 +16,7 @@
>  #      sparc port by Martin Habets <errandir_news@....eclipse.co.uk>
>  #      ppc64le port by Breno Leitao <leitao@...ian.org>
>  #      riscv port by Wadim Mueller <wafgo01@...il.com>
> +#      loongarch port by Youling Tang <tangyouling@...inos.cn>
>  #
>  #      Usage:
>  #      objdump -d vmlinux | scripts/checkstack.pl [arch]
> @@ -104,6 +105,9 @@ my (@stack, $re, $dre, $sub, $x, $xs, $funcre, $min_stack);
>         } elsif ($arch =~ /^riscv(64)?$/) {
>                 #ffffffff8036e868:      c2010113                addi    sp,sp,-992
>                 $re = qr/.*addi.*sp,sp,-(([0-9]{2}|[3-9])[0-9]{2})/o;
> +       } elsif ($arch =~ /^loongarch(32|64)?$/) {
> +               #9000000000224708:      02ff4063                addi.d  $sp, $sp, -48(0xfd0)
> +               $re = qr/.*addi\..*sp, .*sp, -([0-9]{1,8}).*/o;
>         } else {
>                 print("wrong or unknown architecture \"$arch\"\n");
>                 exit
> --
> 2.40.0
>