Re: [RFC][PATCH] Makefile: Fix checkstack.pl arm64 wrong or unknown architecture

Masahiro Yamada
2019-05-31T17:23:52Z

On Sat, Jun 1, 2019 at 1:39 AM George G. Davis <george_davis@mentor.com> wrote:
>
> Hello Masahiro,
>
> On Sat, Jun 01, 2019 at 01:02:37AM +0900, Masahiro Yamada wrote:
> > On Sat, Jun 1, 2019 at 12:27 AM George G. Davis <george_davis@mentor.com> wrote:
> > >
> > > The following error occurs for the `make ARCH=arm64 checkstack` case:
> > >
> > > aarch64-linux-gnu-objdump -d vmlinux $(find . -name '*.ko') | \
> > > perl ./scripts/checkstack.pl arm64
> > > wrong or unknown architecture "arm64"
> > >
> > > Fix the above error by setting `CHECKSTACK_ARCH := aarch64` for the
> > > ARCH=arm64 case.
> > >
> > > Signed-off-by: George G. Davis <george_davis@mentor.com>
> >
> >
> > Why don't you fix scripts/checkstack.pl ?
>
> Like so?:
>

As far as I understood, checkstack.pl is supposed to
understand both ARCH= and 'uname -m'.

For example, the following commit supports x86, x86_64, i386,
by using regular expression.

commit fda9f9903be6c3b590472c175c514b0834bb3c83
Author: Konstantin Khlebnikov <koct9i@gmail.com>
Date: Fri Aug 8 14:23:35 2014 -0700

scripts/checkstack.pl: automatically handle 32-bit and 64-bit mode
for ARCH=x86

This patch adds support for ARCH=x86 into checkstack.

Following this pattern, does this work for you?

diff --git a/scripts/checkstack.pl b/scripts/checkstack.pl
index 122aef5e4e14..371bd17a4983 100755
--- a/scripts/checkstack.pl
+++ b/scripts/checkstack.pl
@@ -46,7 +46,7 @@ my (@stack, $re, $dre, $x, $xs, $funcre);
$x = "[0-9a-f]"; # hex character
$xs = "[0-9a-f ]"; # hex character or space
$funcre = qr/^$x* <(.*)>:$/;
- if ($arch eq 'aarch64') {
+ if ($arch =~ '^(aarch|arm)64$') {
#ffffffc0006325cc: a9bb7bfd stp x29,
x30, [sp, #-80]!
#a110: d11643ff sub sp, sp, #0x590
$re = qr/^.*stp.*sp, \#-([0-9]{1,8})\]\!/o;

--
Best Regards
Masahiro Yamada