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Message-ID: <CAK4o1WyFSUU5UY3-tubF1Z-whjOhkN7Z65vA-ByCY8D412PRTQ@mail.gmail.com>
Date: Sat, 29 Jun 2013 17:34:46 +0100
From: Justin Cormack <justin@...cialbusservice.com>
To: musl@...ts.openwall.com
Subject: Re: dlinfo
On 29 Jun 2013 17:31, "Rich Felker" <dalias@...ifal.cx> wrote:
>
> On Sat, Jun 29, 2013 at 05:14:16PM +0100, Justin Cormack wrote:
> > On 29 Jun 2013 16:54, "Rich Felker" <dalias@...ifal.cx> wrote:
> > >
> > > On Sat, Jun 29, 2013 at 04:40:17PM +0100, Justin Cormack wrote:
> > > > Has anyone got any plans to implement dlinfo?
> > >
> > > I'm not opposed to it, but not sure how easy it would be.
> > > RTLD_DI_LINKMAP looks trivial (just return the argument passed in),
> > > but the origin and search information is stuff that's probably not
> > > saved with the current dynamic linker implementation.
> >
> > Linkmap is the only bit I need actually. NetBSD apparently only
implements
> > that and not the rest, so it is not unprecedented.
>
> As a quick workaround then:
>
> -D'dlinfo(x,y,z)=(*(struct link_map *)(z) = (void *)(x))'
>
> Kidding aside, I wouldn't actually recommend this, since you'd be
> encoding implementation internals (the fact that the dso handle is
> actually the link_map pointer) into the application, which could badly
> break if the implementation is ever changed. I'll just go ahead and
> add this limited version of dlinfo; look for it soon and ping me if
> you don't see it.
>
> Rich
Thanks!
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