This is the mail archive of the gdb@sourceware.org mailing list for the GDB project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]
Other format:	[Raw text]

Re: determining whether page 0 (or low addresses in general) is executable

From: Daniel Jacobowitz <drow at false dot org>
To: Doug Evans <dje at google dot com>
Cc: gdb at sourceware dot org, ppluzhnikov at google dot com
Date: Wed, 16 Apr 2008 22:33:06 -0400
Subject: Re: determining whether page 0 (or low addresses in general) is executable
References: <20080416192047.984F91C75AD@localhost> <20080416193346.GA25227@caradoc.them.org> <e394668d0804161802y1b5c324dva49a932511f304c5@mail.gmail.com>

On Wed, Apr 16, 2008 at 06:02:24PM -0700, Doug Evans wrote:
> >  I thought GNU ld only had this problem for .debug_info and already
> >  edited out discarded FDEs from .debug_frame / .eh_frame.  Are you
> >  using GNU ld or gold?  Maybe the linker only edits .eh_frame.
> 
> Actually the problem occurs with both gld and gold.  The linker does
> explicitly handle .eh_frame, and I'm told the debug info doesn't go
> into comdat on purpose (complexity issues I gather).

OK, so we could probably fix this in GNU ld by reusing the eh-frame
editor for .debug_frame too.  COMDAT is better, of course.  It's just
hard :-(

-- 
Daniel Jacobowitz
CodeSourcery

References:
- determining whether page 0 (or low addresses in general) is executable
  - From: Doug Evans
- Re: determining whether page 0 (or low addresses in general) is executable
  - From: Daniel Jacobowitz
- Re: determining whether page 0 (or low addresses in general) is executable
  - From: Doug Evans

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]