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Re: Question about ELF core file sections
- From: Daniel Jacobowitz <drow at false dot org>
- To: Randolph Chung <randolph at tausq dot org>
- Cc: gdb at sources dot redhat dot com
- Date: Wed, 16 Nov 2005 10:49:42 -0500
- Subject: Re: Question about ELF core file sections
- References: <437B53B4.5000906@tausq.org>
On Wed, Nov 16, 2005 at 11:43:48PM +0800, Randolph Chung wrote:
> I'm trying to get core file support working on hppa64-hp-hpux11.11. I'm
> trying to reuse the infrastructure from corelow.c and the "new"
> regset_from_core_section() interface, but I'm a bit confused about how
> it's supposed to work.
>
> corelow.c:get_core_registers() is hardcoded to look for registers in
> sections ".reg", ".reg2", ".reg-xfp" -- are these section names somehow
> standard? I don't find these documented in the ELF specs. I see that on
> Linux variants, this ".reg" section is actually synthesized by bfd. This
> all seems to be a bit convoluted :(
They aren't section names at all. Core files don't have sections, only
segments. They're a purely BFD-internal convention.
> On HPUX, there is a program header type HP_CORE_PROC that points to a
> datastructure with the register info. Is there anyway to use the
> existing interface to get to this info? If not, it looks like I can get
> it to work using core_vec, but that uses an interface that is marked
> deprecated....
You play the same tricks in BFD that ELF does, probably :-)
Alternatively you query the program headers to do it, but the existing
GDB<->BFD interface is very section-oriented.
--
Daniel Jacobowitz
CodeSourcery, LLC