linux-kernel - Re: [PATCH] kbuild: Fix names of .tmp

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Message-ID: <CA+icZUWfoP=-dpEYjQU5RZxESYyxjXsQZ9=PiVfKUD71DFb6MA@mail.gmail.com>
Date: Tue, 26 Nov 2024 17:06:03 +0100
From: Sedat Dilek <sedat.dilek@...il.com>
To: Masahiro Yamada <masahiroy@...nel.org>
Cc: Nathan Chancellor <nathan@...nel.org>, Nicolas Schier <nicolas@...sle.eu>, linux-kbuild@...r.kernel.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kbuild: Fix names of .tmp_vmlinux kallsyms files

On Tue, Nov 26, 2024 at 4:12 PM Sedat Dilek <sedat.dilek@...il.com> wrote:
>
> On Tue, Nov 26, 2024 at 4:01 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
> >
> > On Sat, Nov 23, 2024 at 10:22 PM Sedat Dilek <sedat.dilek@...il.com> wrote:
> > >
> > > For details, see thread "kbuild-next: .tmp vmlinux syms files"
> > >
> > > INFO: This patch is against Linux v6.12.
> > >
> > > Link: https://lore.kernel.org/all/CA+icZUXvu0Kw8RH1ZGBKgYGG-8u9x8BbsEkjtm4vSVKkXPTg+Q@mail.gmail.com/
> >
> > This is not the right way to input a commit description.
> >
>
> Hi Masahiro,
>
> I can add a proper commit description in v2.
>
> >
> > >
> > > Signed-off-by: Sedat Dilek <sedat.dilek@...il.com>
> > > ---
> > >  scripts/link-vmlinux.sh | 12 ++++++------
> > >  1 file changed, 6 insertions(+), 6 deletions(-)
> > >
> > > diff --git a/scripts/link-vmlinux.sh b/scripts/link-vmlinux.sh
> > > index a9b3f34a78d2..c9088436baff 100755
> > > --- a/scripts/link-vmlinux.sh
> > > +++ b/scripts/link-vmlinux.sh
> > > @@ -203,8 +203,8 @@ kallsymso=
> > >  strip_debug=
> > >
> > >  if is_enabled CONFIG_KALLSYMS; then
> > > -       true > .tmp_vmlinux.kallsyms0.syms
> > > -       kallsyms .tmp_vmlinux.kallsyms0.syms .tmp_vmlinux0.kallsyms
> > > +       true > .tmp_vmlinux0.kallsyms.syms
> > > +       kallsyms .tmp_vmlinux0.kallsyms.syms .tmp_vmlinux0.kallsyms
> >
> > If you aim for naming consistency, this should be
> >
> > .tmp_vmlinux0.syms
> >
>
> OK.
> I was thinking of this, too.
> I can change this as well.
>
> The rest below is OK?
>
> Thanks for your comments.
>

Info: Sent v2

Link: https://lore.kernel.org/all/20241126155832.15560-1-sedat.dilek@gmail.com/

> Best regards,
> -Sedat-
>
> >
> >
> > >  fi
> > >
> > >  if is_enabled CONFIG_KALLSYMS || is_enabled CONFIG_DEBUG_INFO_BTF; then
> > > @@ -231,14 +231,14 @@ if is_enabled CONFIG_KALLSYMS; then
> > >         # Generate section listing all symbols and add it into vmlinux
> > >         # It's a four step process:
> > >         # 0)  Generate a dummy __kallsyms with empty symbol list.
> > > -       # 1)  Link .tmp_vmlinux.kallsyms1 so it has all symbols and sections,
> > > +       # 1)  Link .tmp_vmlinux1.kallsyms so it has all symbols and sections,
> > >         #     with a dummy __kallsyms.
> > > -       #     Running kallsyms on that gives us .tmp_kallsyms1.o with
> > > +       #     Running kallsyms on that gives us .tmp_vmlinux1.kallsyms.o with
> > >         #     the right size
> > > -       # 2)  Link .tmp_vmlinux.kallsyms2 so it now has a __kallsyms section of
> > > +       # 2)  Link .tmp_vmlinux2.kallsyms so it now has a __kallsyms section of
> > >         #     the right size, but due to the added section, some
> > >         #     addresses have shifted.
> > > -       #     From here, we generate a correct .tmp_vmlinux.kallsyms2.o
> > > +       #     From here, we generate a correct .tmp_vmlinux2.kallsyms.o
> > >         # 3)  That link may have expanded the kernel image enough that
> > >         #     more linker branch stubs / trampolines had to be added, which
> > >         #     introduces new names, which further expands kallsyms. Do another
> > > --
> > > 2.45.2
> > >
> >
> >
> > --
> > Best Regards
> > Masahiro Yamada