I think this has been talked about in the past here, but I'm interested in helping bringing JIT emulation to ArcEm (And other projects, e.g. RPCEmu)
So the first question is - does anyone know of any active attempts to produce an open source ARM JIT emulator? (Preferably ARM-on-ARM, or something which could be extended to support ARM-on-ARM). Or if there aren't any active projects, who else would be interested in working on one? Assuming there isn't already a project, I've started to draw up plans for my own ARM-on-ARM JIT emulator. If you guys are interested then I'd like to run it by you just to make sure I'm not making any stupid mistakes. The basic plan is for the emulator to be a 'plug and play' solution - your project will need an existing interpreter, and the JIT will just take over execution for whatever instruction sequences it can. This will simplify the design somewhat, at the expense of speed (I.e. initial versions may not emulate branch instructions). The interface to the JIT engine is being kept relatively simple, so it should be easy to plug into whatever project needs it, or to rewrite the internals so it produces x86/PPC/etc. assembler. Currently the emulator is targeted at emulating CPU's with a 26bit PSR, but I think it will be fairly easy to make it so the CPU type can be specified at compile/run time. The code it produces will be 26/32bit neutral (Or targeted for whatever mode the host CPU is running in). The only major downside I can see from an emulation standpoint is that it might not accurately model the instruction timings, and it probably won't allow interrupts to halt a JIT sequence. I'm guessing this is the norm for JIT engines. If you want any more information then just ask - in fact the code is nearly at the stage where I can get a few simple instructions JITed and running in a test program. Cheers, - Jeffrey ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ arcem-devel mailing list arcem-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/arcem-devel
