Re: Looking for advise on debugging a non-boot kernel on qemu-system-sh4

[John Paul Adrian Glaubitz]

Hello Zoltan!

On 10/23/21 03:07, BALATON Zoltan wrote:
>> I can confirm that the default config works for me, too. Both with gcc-8 and 
>> gcc-11.
> 
> OK with your config I can reproduce the problem too but the kernel with that 
> config
> is 177MB and the r2d board has 64MB RAM so this can't work that way. Then 
> it's likely
> not a but but a too big kernel.

You either need to strip the kernel with "strip vmlinux" or use the image from 
arch/sh/
boot/zImage.

>> Using that kernel, however, I cannot use the debian-installer initrd.gz, 
>> even with
>> CONFIG_BLK_DEV_INITRD enabled in the kernel configuration.
>>
>> The kernel prints a message saying that the initramfs is uncompressed, but 
>> whatever I
>> do I cannot get it to mount the initramfs. All I get is this:
>>
>> [    0.096000] Trying to unpack rootfs image as initramfs...
>>
>> and then later:
>>
>> [    0.480000] ---[ end trace 46a3adcb34136251 ]---
>> [    0.480000] Kernel panic - not syncing: Attempted to kill init! 
>> exitcode=0x0000000b
>> [    0.480000] ---[ end Kernel panic - not syncing: Attempted to kill init! 
>> exitcode=0x0000000b ]---
> 
> I don't know, you have to find the needed config options to have what's 
> needed to use this initrd.
> You could either try to strip down the debian config or add more to the 
> default until you get a
> working kernel that fits in the memory (and there's some left to run other 
> processes).

I'll keep digging.

Adrian

-- 
 .''`.  John Paul Adrian Glaubitz
: :' :  Debian Developer - glaubitz@debian.org
`. `'   Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
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