* regression for microblaze architecture
@ 2017-05-27 8:51 Waldemar Brodkorb
2017-05-27 14:44 ` [Buildroot] " Thomas Petazzoni
2017-05-27 16:09 ` Michael Eager
0 siblings, 2 replies; 5+ messages in thread
From: Waldemar Brodkorb @ 2017-05-27 8:51 UTC (permalink / raw)
To: gcc; +Cc: Ajit Agarwal, Michael Eager, buildroot, dev
Hi,
Buildroot and OpenADK have samples to create a Linux system to be
bootup in Qemu system emulation for microblaze architecture.
With gcc 6.3 and 7.1 the samples are not working anymore,
because the Linux system userland does not boot.
Qemu 2.9.0:
Kernel panic - not syncing: Attempted to kill init!
exitcode=0x0000000b
(with glibc, musl and uClibc-ng toolchains)
I bisected gcc source code and found the bad commit:
6dcad60c0ef48af584395a40feeb256fb82986a8
When reverting the change, gcc 6.3 and 7.1 produces working
Linux rootfs again.
What can we do about it?
best regards
Waldemar
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [Buildroot] regression for microblaze architecture
2017-05-27 8:51 regression for microblaze architecture Waldemar Brodkorb
@ 2017-05-27 14:44 ` Thomas Petazzoni
2017-05-27 16:09 ` Michael Eager
1 sibling, 0 replies; 5+ messages in thread
From: Thomas Petazzoni @ 2017-05-27 14:44 UTC (permalink / raw)
To: Waldemar Brodkorb; +Cc: gcc, Ajit Agarwal, Michael Eager, dev, buildroot
Hello,
On Sat, 27 May 2017 10:51:22 +0200, Waldemar Brodkorb wrote:
> Buildroot and OpenADK have samples to create a Linux system to be
> bootup in Qemu system emulation for microblaze architecture.
>
> With gcc 6.3 and 7.1 the samples are not working anymore,
> because the Linux system userland does not boot.
> Qemu 2.9.0:
> Kernel panic - not syncing: Attempted to kill init!
> exitcode=0x0000000b
> (with glibc, musl and uClibc-ng toolchains)
>
> I bisected gcc source code and found the bad commit:
> 6dcad60c0ef48af584395a40feeb256fb82986a8
Nice, great work!
> When reverting the change, gcc 6.3 and 7.1 produces working
> Linux rootfs again.
>
> What can we do about it?
1. Add a revert of this commit in Buildroot for gcc 6.x and 7.x
2. Report the bug upstream, pointing to the problematic commit
Best regards,
Thomas
--
Thomas Petazzoni, CTO, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: regression for microblaze architecture
2017-05-27 8:51 regression for microblaze architecture Waldemar Brodkorb
2017-05-27 14:44 ` [Buildroot] " Thomas Petazzoni
@ 2017-05-27 16:09 ` Michael Eager
2017-05-27 18:30 ` Michael Eager
2017-08-09 13:41 ` Martin Liška
1 sibling, 2 replies; 5+ messages in thread
From: Michael Eager @ 2017-05-27 16:09 UTC (permalink / raw)
To: Waldemar Brodkorb, gcc; +Cc: Ajit Agarwal, buildroot, dev, Thomas Petazzoni
On 05/27/2017 01:51 AM, Waldemar Brodkorb wrote:
> Hi,
>
> Buildroot and OpenADK have samples to create a Linux system to be
> bootup in Qemu system emulation for microblaze architecture.
>
> With gcc 6.3 and 7.1 the samples are not working anymore,
> because the Linux system userland does not boot.
> Qemu 2.9.0:
> Kernel panic - not syncing: Attempted to kill init!
> exitcode=0x0000000b
> (with glibc, musl and uClibc-ng toolchains)
>
> I bisected gcc source code and found the bad commit:
> 6dcad60c0ef48af584395a40feeb256fb82986a8
>
> When reverting the change, gcc 6.3 and 7.1 produces working
> Linux rootfs again.
>
> What can we do about it?
I will revert this commit in GCC.
--
Michael Eager eager@eagercon.com
1960 Park Blvd., Palo Alto, CA 94306 650-325-8077
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: regression for microblaze architecture
2017-05-27 16:09 ` Michael Eager
@ 2017-05-27 18:30 ` Michael Eager
2017-08-09 13:41 ` Martin Liška
1 sibling, 0 replies; 5+ messages in thread
From: Michael Eager @ 2017-05-27 18:30 UTC (permalink / raw)
To: Waldemar Brodkorb, gcc; +Cc: Ajit Agarwal, buildroot, dev, Thomas Petazzoni
On 05/27/2017 09:09 AM, Michael Eager wrote:
> On 05/27/2017 01:51 AM, Waldemar Brodkorb wrote:
>> Hi,
>>
>> Buildroot and OpenADK have samples to create a Linux system to be
>> bootup in Qemu system emulation for microblaze architecture.
>>
>> With gcc 6.3 and 7.1 the samples are not working anymore,
>> because the Linux system userland does not boot.
>> Qemu 2.9.0:
>> Kernel panic - not syncing: Attempted to kill init!
>> exitcode=0x0000000b
>> (with glibc, musl and uClibc-ng toolchains)
>>
>> I bisected gcc source code and found the bad commit:
>> 6dcad60c0ef48af584395a40feeb256fb82986a8
>>
>> When reverting the change, gcc 6.3 and 7.1 produces working
>> Linux rootfs again.
>>
>> What can we do about it?
>
> I will revert this commit in GCC.
Reverted on GCC mainline: Committed revision 248540.
--
Michael Eager eager@eagercon.com
1960 Park Blvd., Palo Alto, CA 94306 650-325-8077
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: regression for microblaze architecture
2017-05-27 16:09 ` Michael Eager
2017-05-27 18:30 ` Michael Eager
@ 2017-08-09 13:41 ` Martin Liška
1 sibling, 0 replies; 5+ messages in thread
From: Martin Liška @ 2017-08-09 13:41 UTC (permalink / raw)
To: Michael Eager, Waldemar Brodkorb, gcc
Cc: Ajit Agarwal, buildroot, dev, Thomas Petazzoni
On 05/27/2017 06:09 PM, Michael Eager wrote:
> On 05/27/2017 01:51 AM, Waldemar Brodkorb wrote:
>> Hi,
>>
>> Buildroot and OpenADK have samples to create a Linux system to be
>> bootup in Qemu system emulation for microblaze architecture.
>>
>> With gcc 6.3 and 7.1 the samples are not working anymore,
>> because the Linux system userland does not boot.
>> Qemu 2.9.0:
>> Kernel panic - not syncing: Attempted to kill init!
>> exitcode=0x0000000b
>> (with glibc, musl and uClibc-ng toolchains)
>>
>> I bisected gcc source code and found the bad commit:
>> 6dcad60c0ef48af584395a40feeb256fb82986a8
>>
>> When reverting the change, gcc 6.3 and 7.1 produces working
>> Linux rootfs again.
>>
>> What can we do about it?
>
> I will revert this commit in GCC.
>
>
Hi.
Looks the revert caused:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68485
Thanks,
Martin
^ permalink raw reply [flat|nested] 5+ messages in thread
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2017-05-27 8:51 regression for microblaze architecture Waldemar Brodkorb
2017-05-27 14:44 ` [Buildroot] " Thomas Petazzoni
2017-05-27 16:09 ` Michael Eager
2017-05-27 18:30 ` Michael Eager
2017-08-09 13:41 ` Martin Liška
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