Date: Tue, 17 Feb 2004 23:46:12 -0700 From: Greg Lewis <glewis@eyesbeyond.com> To: freebsd-sparc64@freebsd.org Subject: Re: Sparc assembler help (jdk13 port) Message-ID: <20040218064612.GA71714@misty.eyesbeyond.com> In-Reply-To: <20040218045138.GH85686@funkthat.com> References: <20040217063042.GA94592@misty.eyesbeyond.com> <20040218045138.GH85686@funkthat.com>
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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@eyesbeyond.com Eyes Beyond Web : http://www.eyesbeyond.com Information Technology FreeBSD : glewis@FreeBSD.org
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