Sparc assembler help (jdk13 port)
glewis at eyesbeyond.com
Tue Feb 17 22:46:26 PST 2004
On Tue, Feb 17, 2004 at 08:51:38PM -0800, John-Mark Gurney wrote:
> Greg Lewis wrote this message on Mon, Feb 16, 2004 at 23:30 -0700:
> > I'm trying to get the jdk13 port running on sparc64. Unfortunately JDK
> > 1.3.1 runs on the Sparc in 32 bit mode under Solaris, so there were a
> > number of 32 bit vs. 64 bit problems. I think I've got most of the initial
> > stage of the build working correctly, however I'm running into some trouble
> > with the assembler code which 'translates the "Java" calling convention
> > into the "C" * calling convention used in native methods'. Since the code
> > was written for 32 bit mode it assumes a pointer can be passed in a single
> > 32 bit register, etc. Unfortunately my knowledge of assembler is very
> > limited and in particular I know nothing about Sparc assembler.
> > I'd love to hear from someone who knows some Sparc assembler and in
> > particular how FreeBSD calls functions (i.e. how the arguments are
> > placed into registers or on the stack). Short of this, some pointers
> > to the right information may eventually yield some results.
> I have some experience in assembly, and can try to answer your questions..
Thanks to you and Ken for replying :).
> Sparcs put the arguments into the o? registers (upto to 8)...
And if we have more than 8 arguments they go on the stack?
> You might want to check out www.sparc.com, and look at the SPARCv9 arch
> manual... check out chapter 5 which talks about registers...
Ok, I've had a little look. Unfortunately much of it is going over my head
but it is making some sense.
> > The code itself is quite short, however I can't post it due to the way Sun
> > licenses their Java source code. If you've compiled any of the jdk* ports
> > though, then you've agreed to the appropriate license (Sun Community Source
> > License).
> I did d/l the sun java code a while back.. j2sdk-1_3_1-src.tar.gz..
> guess it wasn't as far back as I thought.. :)
Well, its a while back, but like I said, 1.3.1 is a whole lot easier than
1.4.2, so I'm trying that first.
I'll send followup email to you and Ken off list. Thanks!
Greg Lewis Email : glewis at eyesbeyond.com
Eyes Beyond Web : http://www.eyesbeyond.com
Information Technology FreeBSD : glewis at FreeBSD.org
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