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From: "Vladimir Olovyannikov" <vladimir.olovyannikov@broadcom.com>
References: <102e9863f7b0a90cbf854d059d9bcf25@mail.gmail.com> <CAKv+Gu821J6foS7EHE5zL1v0xDg_PW5nJVGX+a65FdYo0Pdn7A@mail.gmail.com>
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Date: Tue, 10 Dec 2019 09:25:40 -0800
Message-ID: <04a4b0a07c2c090141430d7427e1a405@mail.gmail.com>
Subject: Re: Debugging aarch64 edk2 built with gcc-8.x 64-bit arm compiler
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>, Sami Mujawar <Sami.Mujawar@arm.com>
Cc: edk2-devel-groups-io <devel@edk2.groups.io>
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> -----Original Message-----
> From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Sent: Tuesday, December 10, 2019 9:13 AM
> To: Vladimir Olovyannikov <vladimir.olovyannikov@broadcom.com>; Sami
> Mujawar <Sami.Mujawar@arm.com>
> Cc: edk2-devel-groups-io <devel@edk2.groups.io>
> Subject: Re: Debugging aarch64 edk2 built with gcc-8.x 64-bit arm compile=
r
>
> On Sat, 7 Dec 2019 at 00:50, Vladimir Olovyannikov
> <vladimir.olovyannikov@broadcom.com> wrote:
> >
> > Hi Ard,
> >
> >
> >
> > We are about to switch to the latest Yocto. It is shipped with gcc-8.3
> aarch64-linux-gnu compiler.
> >
> > We use DS5 for bare metal debugging.
> >
> > When I build edk2 with gcc-7-x/gcc-8.x, DS5 complains on DWARF format.
> > I tried to explicitly set it to DWARF2, but still cannot even get the
> > stack or local variables (even though DS5 does not complain), even for
> > edk2
> NOOPT build.
> >
> >
> >
> > Using gcc-6.3 from Linaro, I don=E2=80=99t see any issue with DS5 debug=
ging.
> >
> > Am I missing any steps?
> >
> > Build is done with GCC5_AARCH64_PREFIX=3Daarch64-linux-gnu
> >
> >
> >
> > Another question: it seems that the DS5 scripts limit the path size wit=
h
> > 255
> chars. With a source built by Yocto, it can easily be more than that.
> >
> > Attempt to add symbols for such modules ends up with error message in
> the DS5 command window that it could not add those symbols.
> >
> > Is there a procedure to increase the path length limit?
> >
>
> I have never in my life used a DS-5 to debug EDK2 running on bare metal,
> so
> unfortunately, I won't be able to help you.
>
How do you normally debug edk2 with DS5? Or, are you using a different
mechanism?
Debugging with DS5 was/is very convenient.

Thank you,
Vladimir
> I have added Sami to cc, he might know. Sami?
>
> --
> Ard.