Re: RFC: Unwind info for PLT

[Richard Henderson <rth at redhat dot com>]

On 06/13/2011 10:13 AM, Jakub Jelinek wrote:
> Yeah, easier to write and easier to change.  Anyway, if you prefer to do
> it in ld, I can try to do it there.  Just a question, should it be done
> unconditionally, or guarded with some ld cmdline option (either existing one, like
> abuse --eh-frame-hdr for it, or a new one)?

I don't have a real preference.  I could see abusing --eh-frame-hdr makes sense.

> On other targets like SPARC or PowerPC -mbss-plt it is the dynamic linker
> which updates or completely writes .plt section though, should in that
> case the dynamic linker provide the unwind info instead?

I thought that those ABIs were deprecated.  At which point I don't find
myself caring much.  Besides -- the RISC PLT formats don't adjust the
stack, so the "default" unwinding rule of looking at the return address
works.


r~