Re: [Libunwind-devel] Small patch for Frysk

[Andrew Cagney]

[Jose thanks for re-pushing this.]

Arun Sharma wrote:
> On 8/7/07, David Mosberger-Tang <address@hidden> wrote:
>   
> > Jose,
> >
> > The function is rather low-level and as such there is a risk that the
> > interface is not really portable across platforms.  The implementation
> > is obviously DWARF-specific, so src/mi/ isn't really the right place
> > for it, but that's a minor detail.
> >
> > Why does Frysk need this operation?
> >
> >     
>
> This one has come up before:
>
> http://www.mail-archive.com/address@hidden/msg00107.html
>
> I think there are two use cases:
>
> a) Unwind a stack in an i386 address space running on a x86-64 kernel.
> b) Unwind statically linked binaries on any dwarf platform (where
> dl_iterate_phdr doesn't find the unwind table).
>   
Yes, and in particular any remote unwinding involving dwarf.
> Like David suggested, putting this code under dwarf and making
> statically linked binaries work might be a good first step.  The way
> the patch stands now, it adds an API that nothing in the tree actually
> uses.
>
> Subsequently we can consider support for cross ABI unwinding
> (hopefully it'll be an even smaller patch).
I was given the impression that this worked; but it seems to only really 
work with ia64 on i386.

Andrew