Mikolaj Habryn wrote:
Hi Mikolaj,
i went to bed before you popped in on irc last night :(
I'm trying to run a jit3'd kaffe (CVS HEAD) on a mipsel/uClibc box. It isn't much of a box; it's actually a Linksys wireless router with a Broadcom embedded MIPS core, but I figured it was worth a try. MIPS is MIPS, right? Right? :)
Cool. And CVS HEAD, too, that's good hacking spirit. Let's see if we can get it fly on your board.
Unfortunately, it bombs out more or less instantly, apparently as soon as it tries to jit, with an Illegal Instruction error (in java/lang/Object). Reading the mailing list archives, it appears that there's been some serious progress for this architecture this year, so I expect I'm doing something horribly wrong somewhere.
It's not necessarily your fault ;) The MIPS jit seems to have be broken for a while now, unfortunately. It would take a bit of excerising the jit regression tests and debugging by a motivated hacker to fix it. Would you be interested in having a go at it?
[EMAIL PROTECTED]:~# LD_LIBRARY_PATH=. ./kaffe-bin -verbosejit -Xnative-big-math -Xbootclasspath:./sparse-2.jar -cp ./parsesol.jar to.rcpt.mikolaj.ParseSolicitation <JIT: java/lang/String.<clinit>()V time 12ms (12ms) @ 0x1008cc08 (0x100630b4)> <JIT: java/lang/String$ICComp.<init>(Ljava/lang/String$1;)V time 2ms (14ms) @ 0x1008c9e8 (0x10064b30)> <JIT: java/lang/String$ICComp.<init>()V time 2ms (16ms) @ 0x1008cdc8 (0x10064af4)> <JIT: java/lang/Object.<init>()V time 0ms (16ms) @ 0x2ab4bc90 (0x100572a4)> Illegal instruction (core dumped) [EMAIL PROTECTED]:~# sh: turning off NDELAY mode
That definitely looks bad ;)
I'd like to supply more information, but I can't even get a cross-gdb built with --enable-targets=all to recognize the core file or the executable (*boggle*). Again, I'm obviously doing something hideously wrong, but I'm at my wits' end trying to work out what it might be. I've put all of the files up at http://mikolaj.tv/kaffe/ if they're of use to anyone.
You could try crosstools, I believe that it has a mips toolchain. I don't know if specialized gdb is a part of it, though. You could ask on the linksys lists about pointers for a gdb capable of dealing with it.
Interpreted mode works fine, if one could describe a 25 minute wait to verify a signed XML file with a couple of embedded certificates as fine.
Uh ... no, you definitely want to have a jit ;)
Um. Help? Please? :)
Sure. Given that interpreter works, it appears to be a jit-specific problem. There are jit-specific regression tests, in test/internal. You can try to check those out to work out how & why the jit fails.
The other very welcome thing would be to clean up the compiler warnings in config/mips directory.
Finally, do all regression tests pass for you with interpreter engine?
cheers, dalibor topic
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