[openbeos] Re: libscreensaver.so Proof of Concept
- From: "Michael Phipps" <mphipps1@xxxxxxxxxxxxxxxx>
- To: openbeos@xxxxxxxxxxxxx
- Date: Thu, 06 Sep 2001 11:41:17 -0400
This, along with the server stuff that I wrote up the other day should be
enough to get anyone making stubbed kits.
Actually, in many ways, none of the kits are any different to get to this stage.
Does anyone out there have any objection to sourceforge CVS?
If not, I will try to get it set up... We can check this in, as well as much of
the other
stuff that has been going on behind the scenes...
>Thats brilliant - thats the sort of spirit we need. This trivial example
>will show the naysayers that what we're trying to accomplish is not
>impossible. Well done, Jason. I think we'll have our first replacement
>library ready before the end of the month. A lot of the simpler kits (game,
>screensaver, storage etc) will become viable very soon, and we'll have more
>manpower for the App_server/Interfacce Kit. A lot of the reverse
>engineering problems (how do we do it) will be solved while trying to port
>these initial kits, and the other groups will learn from them. Make sure
>you share your experience with us (how you solved the encountered obstacles)
>so that we may all benefit from them.
>
>10 points for Jason this week, and a nominee for most valuable developer of
>the week.
>
>
>> -----Original Message-----
>> From: jason_gerstenberger@xxxxxxxxx
>> [SMTP:jason_gerstenberger@xxxxxxxxx]
>> Sent: Friday, September 07, 2001 2:10 PM
>> To: openbeos@xxxxxxxxxxxxx
>> Subject: [openbeos] libscreensaver.so Proof of Concept
>>
>>
>> Gents,
>>
>> To get myself familiar with what we're trying to do in a more hands on
>> way,
>> I picked the smallest .so from /boot/beos/system/lib (libscreensaver.so)
>> and
>> attempted to create a "replacement". I described my process below and it
>> seems to have worked. Obviously this is a very trivial example, but I
>> think
>> it's a microcosm of what you would do for any library.
>>
>> Please let me know if I have made any oversights. The finished .cpp file
>> and the compiled .so are at www.geocities.com/jason_gerstenberger
>>
>> - Jason
>>
>>
>>
>> How to create an Open Source libscreensaver.so in 30 Minutes
>>
>> 1. Create a new shared library project
>> 2. Copy the ScreenSaver.h file into your project directory and add to
>> your
>> project
>> 3. Run stubgen -n -q -g -a ScreenSaver.h to create the cpp
>> 4. Read through objdump for clues (for this lib you don't need many at
>> all!)
>> 5. Build your lib & compare objdumps for your s.o. with the factory s.o.
>> So far as I could tell, my disassem was identical
>> 6. Backup existing lib and insert new one
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