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From: Nick Desaulniers <ndesaulniers@google.com>
To: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Guenter Roeck <linux@roeck-us.net>,
	egorenar@linux.ibm.com, Vasily Gorbik <gor@linux.ibm.com>,
	Joel Stanley <joel@jms.id.au>,
	Ulrich Weigand <Ulrich.Weigand@de.ibm.com>,
	clang-built-linux <clang-built-linux@googlegroups.com>,
	Nathan Chancellor <natechancellor@gmail.com>,
	linux-s390 <linux-s390@vger.kernel.org>
Subject: Re: s390 - buildroot + qemu
Date: Mon, 19 Oct 2020 14:36:10 -0700	[thread overview]
Message-ID: <CAKwvOdnn=i_Jg4B5o4sh2mRNGY9aH1piXoBYwEB4E3PpWZM5bw@mail.gmail.com> (raw)
In-Reply-To: <c461496a-1ea4-4d44-4913-950cabcd3e31@de.ibm.com>

On Mon, Oct 19, 2020 at 3:55 AM Christian Borntraeger
<borntraeger@de.ibm.com> wrote:
>
>
>
> On 17.10.20 01:40, Nick Desaulniers wrote:
> > On Fri, Oct 16, 2020 at 4:18 PM Guenter Roeck <linux@roeck-us.net> wrote:
> >>
> >> On 10/16/20 4:11 PM, Nick Desaulniers wrote:
> >>> Hello all,
> >>> I'm working on integrating the latest release of buildroot (2020.08.1)
> >>> into our CI for ClangBuiltLinux.
> >>>
> >>> https://github.com/ClangBuiltLinux/boot-utils/pull/25
> >>> https://github.com/ClangBuiltLinux/boot-utils/pull/26
> >>> https://github.com/ClangBuiltLinux/continuous-integration/pull/327
> >>>
> >>> I'm seeing the following error from QEMU:
> >>> KASLR disabled: CPU has no PRNG
> >>> Linux version 5.9.0-00732-g04ed4527465f (ndesaulniers@<myhost>) #30
> >>> SMP Fri Oct 16 15:49:05 PDT 2020Kernel fault: interruption code 0005
> >>> ilc:2
> >>> PSW : 0000200180000000 000000000001779e
> >>>       R:0 T:0 IO:0 EX:0 Key:0 M:0 W:0 P:0 AS:0 CC:2 PM:0 RI:0 EA:3
> >>> GPRS: 0000000000000001 0000000c00000000 00000003fffffff4 00000000fffffff0
> >>>       0000000000000000 00000000fffffff4 000000000000000c 00000000fffffff0
> >>>       00000000fffffffc 0000000000000000 00000000fffffff8 00000000008a75a8
> >>>       0000000000000009 0000000000000002 0000000000000008 000000000000bce0
>
> Do you have more information? If not, any chance to run objdump on the kernel
> and check what instructions do you have aroung address 0x1779e
> [...]

Is PSW the program counter?
/me skims https://www.kernel.org/doc/Documentation/s390/Debugging390.txt *woah*
Is there something more specific I should be running than:
$ s390x-linux-gnu-objdump -Dr vmlinux | grep 179fe
because I get lots of hits for that, but not 0x179fe.

In fact, the first symbol starts at 0x100000. Unless this is a failure
in the image decompressor?

>
> > Hopefully qemu supports something newer than Z900?  Or can we change
> > arch/s390/Kconfig:255 to use a different arch? Is arch9 == z900???:
>
> Newer QEMUs do support up to z13, so I think this is not an issue as long
> as you have an uptodate qemu.

$ qemu-system-s390x --version
QEMU emulator version 5.1.0 (Debian 1:5.1+dfsg-4)

-- 
Thanks,
~Nick Desaulniers

  parent reply	other threads:[~2020-10-19 21:36 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-16 23:11 s390 - buildroot + qemu Nick Desaulniers
2020-10-16 23:18 ` Guenter Roeck
2020-10-16 23:40   ` Nick Desaulniers
2020-10-17  0:15     ` Guenter Roeck
2020-10-19 10:54     ` Christian Borntraeger
2020-10-19 14:51       ` Guenter Roeck
2020-10-19 21:36       ` Nick Desaulniers [this message]
2020-10-19 22:03         ` Guenter Roeck
2020-10-20  5:34         ` Christian Borntraeger
2020-10-19 11:44     ` Cornelia Huck

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