Re: unwind support for Linux 2.6 vsyscall DSO

[Kevin Buettner <kevinb at redhat dot com>]

On Oct 10,  6:47pm, Roland McGrath wrote:

> > SOLIB_ADD will only be called when the dynamic linker's "hey, I've
> > just (un)loaded something new" breakpoint has been hit.  (More
> > precisely, this is the breakpoint placed at r_brk in the r_debug
> > struct.) This occurs quite early in the execution of the program, but
> > it might not be early enough.  Also, as Daniel alludes, it won't
> > happen at all for static binaries.
> 
> Ok, then that is really not sufficient.  I apparently got a mistaken
> impression of how early it gets called from the previous discussion.  The
> more I think about it, the more a single new hook that is clearly "inferior
> address space we haven't seen before" (i.e. exec/attach but not fork) looks
> like the clean and sensible thing.  All the existing hooks have semantics
> that are either not quite clear or are clearly different from that.

Sounds right to me...

Kevin