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Re: c++/4356: Exception handling does not work at all for NetBSD/i386ELF target
- To: nobody at gcc dot gnu dot org
- Subject: Re: c++/4356: Exception handling does not work at all for NetBSD/i386ELF target
- From: Krister Walfridsson <cato at df dot lth dot se>
- Date: 16 Oct 2001 21:36:01 -0000
- Cc: gcc-prs at gcc dot gnu dot org,
- Reply-To: Krister Walfridsson <cato at df dot lth dot se>
The following reply was made to PR c++/4356; it has been noted by GNATS.
From: Krister Walfridsson <cato@df.lth.se>
To: Richard Henderson <rth@redhat.com>
Cc: <olgerd@pobox.com>, <gcc-gnats@gcc.gnu.org>, <nobody@gcc.gnu.org>,
<gcc-bugs@gcc.gnu.org>, <gcc-patches@gcc.gnu.org>
Subject: Re: c++/4356: Exception handling does not work at all for NetBSD/i386
ELF target
Date: Tue, 16 Oct 2001 23:31:23 +0200 (MEST)
On Tue, 16 Oct 2001, Richard Henderson wrote:
> On Mon, Oct 15, 2001 at 11:25:45PM +0200, Krister Walfridsson wrote:
> > * config/i386/netbsd-elf.h (ASM_OUTPUT_ADDR_DIFF_ELT): Define.
> > (JUMP_TABLES_IN_TEXT_SECTION): Define.
>
> Err.. This has nothing at all to do with exception handling.
> It has everything to do with switch statements.
Well, in the process of throwing/catching an exception we run some
code. Among other, the function read_encoded_value_with_base() in
eh_personality.cc. And that function has a switch statment...
Sorry for being unclear about the actual failure in my previous mail.
> So what is the actual problem here, given that readonly_data_section
> will fall back to text_section on a.out systems?
But this is not an a.out system...
Actually I have no clue if JUMP_TABLES_IN_TEXT_SECTION is needed, but
the FreeBSD ELF version has a comment claiming it is necessary. And
NetBSD and FreeBSD is nearly identical, so if it is needed by FreeBSD,
then it is needed by NetBSD too...
/Krister