Extending plugin patch

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Abhijit,

I plan to go ahead with your patch. Thanks a lot for this work.

1. I fixed minor bug (attempt to check for plugin destructor before
dlopen) and move all dlsym() calls to create_plugin() to get better
diagnostic. Let me know if you interesting in patch.

2. I plan to add a pointer to "gdb_plugin_api" struct as the argument
to init_func.  This struct should contain pointers to functions
required for plugin to interact with gdb, for instance - to read a
memory of program being debugged.

I suspect it's read_memory()?

  Unfortunately I'm not familiar with gdb internals, so any advice is
much appreciated.

- -Dmitry

- -- 
Dmitry Samersoff
Saint Petersburg, Russia, http://devnull.samersoff.net
* There will come soft rains  ...
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