> On May 25, 2020, at 7:19 PM, Rebecca Cran <rebe...@bsdio.com> wrote:
>
> On 5/24/20 9:30 PM, Andrew Fish via groups.io wrote:
>
>> I could open source an lldb symbolication Python script and I'm happy to
>> explain the common logic to some one to make it easier to port this lldb
>> command [3] to gdb. The command can load symbols for any address that is
>> located in a loaded PE/COFF image, and when you import the command into lldb
>> it symbolicates the current frame.
>
>
> As Laszlo has already explained, information about debugging with gdb is a
> bit scattered. I seem to recall there were discussion about getting the
> DebugPkg into edk2, but there was disagreement about it.
>
> However, since I work on platforms which have lldb in base (FreeBSD) or are
> easily available (Linux), I'd certainly be interested if you were to open
> source the efi_symolicate.py script and I could learn how to use lldb.
>
Rebecca,
Thanks for the feedback, and the help over the years. When I get my other
Xcode commits upstreamed I can commit the lldb script if we can agree as a
community the location of that new content. I've already refactored the lldb
script to use a class to abstract lldb specifics, so that should make it much
easier to port to gdb.
FYI the magic to get lldb working with QEMU is:
$ curl -O
https://raw.githubusercontent.com/llvm-mirror/lldb/master/examples/python/x86_64_target_definition.py
$ lldb -o "settings set plugin.process.gdb-remote.target-definition-file
x86_64_target_definition.py" -o "gdb-remote 1234" -o "command script import
efi_symbolicate.py"
The issue is the lldb gdb-remote does not fall back to a primitive serial
protocol so we need to point it at x86_64_target_definition.py to know how to
connect. This also gets rid of he need to point at an executable. If you remove
importing my script that will give you assembly level debugging with QEMU. But
source is more interesting, unless you are really stuck.
This is a good place to start to learn lldb: http://lldb.llvm.org/use/map.html
Thanks,
Andrew Fish
>
> --
> Rebecca Cran
>
>
>
>
>
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