From owner-freebsd-alpha  Mon Sep  9 14: 3:52 2002
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Subject: Re: getting closer (was Re: mozilla failure on 4.6.2)
From: Joe Marcus Clarke <marcus@marcuscom.com>
To: Andrew Gallatin <gallatin@cs.duke.edu>
Cc: obrien@FreeBSD.ORG, alpha@FreeBSD.ORG
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On Mon, 2002-09-09 at 16:56, Andrew Gallatin wrote:
> 
> Andrew Gallatin writes:
>  > 
>  > David O'Brien writes:
>  >  > The vtable format in stable is not the same as AlphaLinux, it is the same
>  >  > in -CURRENT.  Do we know if the results you posted also happen on
>  >  > -CURRENT?
>  > 
>  > Checking now.  Can you explain the vtable format in -stable, or point
>  > me at a description so I can modify the code to work with -stable?
>  > 
> 
> I think I may have figured it out..  I stumbled on the
> $vtable symbol.
> 
> This appended patch *seems* to work as far as the TestXPTCInvoke code
> goes.  I'm going to try YAMB (yet another mozilla build) now.
> 
> I hope I can get it to the post-build stage to see if this fixes the segvs.

Sweet...You're in my neck of the woods, too.  Looks like I might owe you
a beer.

Joe

> 
> Drew
> 
> --- xpcom/reflect/xptcall/src/md/unix/xptcinvoke_linux_alpha.cpp.bak	Mon Sep  9 14:47:20 2002
> +++ xpcom/reflect/xptcall/src/md/unix/xptcinvoke_linux_alpha.cpp	Mon Sep  9 16:48:45 2002
> @@ -163,7 +163,12 @@
>      "bis $16,$16,$1\n\t"    /* load "this" */
>      "ldq $2,16($15)\n\t"    /* load "methodIndex" */
>      "ldq $1,0($1)\n\t"      /* load vtable */
> +#if 0
>      "s8addq $2,16,$2\n\t"   /* vtable index = "methodIndex" * 8 + 16 */
> +#else
> +    "mulq $2,16,$2\n\t"   
> +    "addq $2, 24, $2\n\t"   /* vtable index = "methodIndex" * 16 + 24 */
> +#endif
>      "addq $1,$2,$1\n\t"
>      "ldq $27,0($1)\n\t"     /* load address of function */
>      "jsr $26,($27),0\n\t"   /* call virtual function */
> 
-- 
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