RE: Does gdb support an alternative ELF binary interpreter?

["Agovic, Sanimir" <sanimir dot agovic at intel dot com>]

Hello Yuri,

your runtime linker needs either to implement the rendezvous structure and follow the 
protocol defined in /usr/include/link.h or you need to implement gdb`s target_so_ops
interface to teach the debugger how to retrieve the list of shared objects.

Not sure if the information above helps you.

 -Sanimir

> -----Original Message-----
> From: gdb-owner@sourceware.org [mailto:gdb-owner@sourceware.org] On Behalf Of Yuri
> Sent: Sunday, August 18, 2013 02:41 AM
> To: gdb@sourceware.org
> Subject: Does gdb support an alternative ELF binary interpreter?
> 
> I am loading ELF binaries having debug information using an alternative
> loader/interpreter. gdb doesn't get debug info from them because no
> event of type bp_shlib_event is generated for them.
> Looking through the code I see that system binary interpreters usually
> have debugger support. There is, for ex, symbol _dl_debug_addr in
> interpreter, which contains the value of r_brk, using which gdb can
> generate bp_shlib_event. But _dl_debug_addr is looked up in the (single)
> base executable. So there is no obvious way to have multiple entries
> like this.
> 
> Does gdb support an alternative interpreter? For example, there could be
> an option "bin-interps", and then gdb could set shlib_event_breakpoint
> there as well.
> Or maybe such situation is supported in some way?
> 
> Yuri
Intel GmbH
Dornacher Strasse 1
85622 Feldkirchen/Muenchen, Deutschland
Sitz der Gesellschaft: Feldkirchen bei Muenchen
Geschaeftsfuehrer: Christian Lamprechter, Hannes Schwaderer, Douglas Lusk
Registergericht: Muenchen HRB 47456
Ust.-IdNr./VAT Registration No.: DE129385895
Citibank Frankfurt a.M. (BLZ 502 109 00) 600119052