Re: [PATCH v2 3/6] docs: qcom: Add qualcomm minidump guide

[Srinivas Kandagatla]

On 18/04/2023 16:19, Mukesh Ojha wrote:
> +@Brian
>
> On 4/14/2023 4:01 AM, Srinivas Kandagatla wrote:
> > On 22/03/2023 13:30, Mukesh Ojha wrote:
> > > +Dump collection
> > > +---------------
> > > +
> > > +The solution supports extracting the minidump produced either over 
> > > USB or
> > > +stored to an attached storage device.
> > > +
> > > +By default, dumps are downloaded via USB to the attached x86_64 machine
> > > +running PCAT (Qualcomm tool) software. Upon download, we will see
> >
> > Are these both PCAT and dexter tools public?
>
> I think, PCAT comes as part of Qcom Package Kit.

yes, this is part of Qualcomm Package Manager.

> Last time, I checked with @Brian, he was saying the they use PCAT 
> software tool running on x86_64 machine attached to QCOM device to
> get the dump(via USB) out of the device.
>
> Dexter.exe seems private tool, that only requires if we use storage
> (via ufs/emmc) to save minidump on the target device itself and later 
> use adb to pull out the rawdump partition dump and pass it through
> dexter to convert it to same binary blobs which we got directly through
> PCAT.
>
> I don't at least have any way to avoid dexter tool at the moment.
> However, i will think if we can develop any script which does the
> same.
That would be nice!

--srini
> -- Mukesh
>
> > --srini
> > > +a set of binary blobs starts with name md_* in PCAT configured 
> > > directory
> > > +in x86_64 machine, so for above example from the client it will be
> > > +md_REGION_A.BIN. This binary blob depends on region content to 
> > > determine
> > > +whether it needs external parser support to get the content of the 
> > > region,
> > > +so for simple plain ASCII text we don't need any parsing and the 
> > > content
> > > +can be seen just opening the binary file.
> > > +
> > > +To collect the dump to attached storage type, one need to write 
> > > appropriate
> > > +value to IMEM register, in that case dumps are collected in rawdump
> > > +partition on the target device itself.
> > > +
> > > +One need to read the entire rawdump partition and pull out content to
> > > +save it onto the attached x86_64 machine over USB. Later, this rawdump
> > > +can be pass it to another tool dexter.exe(Qualcomm tool) which converts
> > > +this into the similar binary blobs which we have got it when 
> > > download type
> > > +was set to USB i.e a set of registered region as blobs and their name
> > > +starts with md_*.
> > > -- 2.7.4