This is the mail archive of the
mailing list for the GCC project.
Re: G++ ABI mismatches
- From: Chris Lattner <sabre at nondot dot org>
- To: Richard Henderson <rth at redhat dot com>
- Cc: Nathan Sidwell <nathan at codesourcery dot com>,<cxx-abi-dev at codesourcery dot com>, <gcc at gcc dot gnu dot org>
- Date: Mon, 25 Aug 2003 18:04:12 -0500 (CDT)
- Subject: Re: G++ ABI mismatches
On Mon, 25 Aug 2003, Richard Henderson wrote:
> On Mon, Aug 25, 2003 at 05:37:42PM -0500, Chris Lattner wrote:
> > But how does cxa_begin catch know what the requested type is for
> > the object? I thought that was the job of the personality routine?
> It is. The personality routine computes the transformed pointer
> as part of the type matching phase. It stores this pointer in a
> c++ language private superclass of _Unwind_Exception. Which is
> then returned by __cxa_begin_catch.
Ah, that's the magic 'catchTemp' variable I suppose. Gotcha.
> > Regardless, if G++ does not meet the ABI spec,
> > either G++ or the ABI should be fixed. Which one? :)
> The ABI. IIRC when I implemented this, I talked to one of the
> HP guys and they do the same thing.
Okay, thanks, this is starting to make a lot more sense. :)