Re: [edk2-devel] Adding DebugPkg to the main edk2 repo

["Laszlo Ersek" <lersek@redhat.com>]

On 05/07/19 10:59, Ryszard Knop wrote:
> Hi Mike,
> 
> GdbSyms can be built separately from the debugged image. It produces a
> DLL file to load while starting GDB so that it properly detects the
> target once connected. The associated gdb_uefi.py script loads it with
> symbol-file to get some info required to find the system table, etc
> (see search_est function).

Yes, that function performs the 4MB-aligned search that Mike mentioned.

> 
> I'm using this script (with QEMU only, not sure about other platforms,
> but could work I guess?) and have a Python 3 port if someone needs it.
> 
> Thanks, Richard
> 
> On 2019-05-07 8:13, Michael D Kinney wrote:
>> Hi Rebecca,
>>
>> This content does not look OVMF specific.
>>
>> Does it depend on QEMU?  Or would this
>> Potentially work on any target that supports
>> gdb?

I'd expect it to interoperate with any gdb server implementation.

Whenever I use DebugPkg, to connect to a running QEMU instance, I launch the following gdb scriptlet (with "gdb -x") from a file:

set height 0
set architecture i386:x86-64:intel
target remote localhost:1234
source .../DebugPkg/Scripts/gdb_uefi.py
reload-uefi -o .../Build/Ovmf3264/NOOPT_GCC48/X64/DebugPkg/GdbSyms/GdbSyms/DEBUG/GdbSyms.dll

Thanks
Laszlo

>>
>> How about adding to SourceLevelDebugPkg as
>> an another method to load symbols?  Not sure
>> why the extra module is required.  The Debug
>> Image Info Table is defined to be on a 4MB
>> boundary and can be found with a search.
>>
>> Mike
>>
>>> -----Original Message-----
>>> From: devel@edk2.groups.io [mailto:devel@edk2.groups.io]
>>> On Behalf Of rebecca@bluestop.org
>>> Sent: Monday, May 6, 2019 7:04 PM
>>> To: devel@edk2.groups.io
>>> Subject: [edk2-devel] Adding DebugPkg to the main edk2
>>> repo
>>>
>>> I think this has been discussed previously, but since
>>> time has passed
>>> I'd like to check again: is there any possibility of
>>> having the DebugPkg
>>> from https://github.com/andreiw/andreiw-
>>> wip/tree/master/uefi/DebugPkg
>>> added to the main edk2 repo in some way (perhaps not as
>>> DebugPkg, but
>>> renamed/reorganized/integrated)?
>>>
>>>
>>> It seems such a useful addition for debugging UEFI code
>>> running under
>>> OVMF that it would be nice to have it somewhere it has
>>> less chance of
>>> bitrotting.
>>>
>>>
>>> -- 
>>> Rebecca Cran
>>>
>>>
>>>
>>
>>
>>
> 
> 
>