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Re: patch for exception handlers in PIC code on ARM
- To: Philip Blundell <philb at gnu dot org>
- Subject: Re: patch for exception handlers in PIC code on ARM
- From: Richard Earnshaw <rearnsha at arm dot com>
- Date: Sun, 14 Jan 2001 16:27:39 +0000
- Cc: gcc-patches at gcc dot gnu dot org
- Cc: rearnsha at arm dot com
- Organization: ARM Ltd.
- Reply-To: rearnsha at arm dot com
philb@gnu.org said:
> The PIC register may need to be reloaded when control passes to an
> exception handler. I haven't actually been able to bootstrap this
> patch on the mainline owing to other problems, but an equivalent
> causes no regressions in my 2.93.3 tree.
Given that the pic register is call-saved, why isn't it automatically
restored from the frame (DWARF) or the jump buf (SJLJ)?
Note, DWARF exception throwing is still not fixed in the trunk, I think I
know the problem, but I still need to do some more tests.
R.