[Crash-utility] [ARM64][patch v5] Auto calculate kimage_voffset by kaslr offset

[Yueyi Li]

On 2017/3/17 22:25, Dave Anderson wrote:
>
> ----- Original Message -----
>> However, that is why I am interested in your live system initialization
>> of kimage_voffset -- for live system access using /dev/mem, /proc/kcore,
>> or an older version of the /dev/crash driver that did not have the ioctl()
>> to read kimage_voffset.  But, in order to do that, arm64_calc_kimage_voffset()
>> needs to be able to handle all /proc/iomem cases to correctly calculate
>> PHYS_OFFSET.
> Or better stated, your arm64_calc_kimage_voffset() needs to be able to handle all
> /proc/iomem cases to correctly calculate kimage_voffset.  Because on the 4.8
> kernel, it does not work.
>
> Dave
>
> --
> Crash-utility mailing list
> Crash-utility at redhat.com
> https://www.redhat.com/mailman/listinfo/crash-utility
Dave,

Sorry for my misunderstanding of PHYS_OFFSET,  actually kimage_voffset 
is the offset between kernel virtual address and physical address. So, 
to calculate it need find out which physical address is mapping to 
VA_START, not PHYS_OFFSET.

Please check patch v5, it should be OK for live system.

Thanks,
Yueyi




-------------- next part --------------
An embedded and charset-unspecified text was scrubbed...
Name: 0001-ARM64-patch-Auto-calculate-kimage_voffset-by-kaslr-o.patch
URL: <http://listman.redhat.com/archives/crash-utility/attachments/20170317/a30e5279/attachment.ksh>