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Date: Sat, 28 Feb 2009 13:02:00 -0000
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From: Mark Kettenis <mark.kettenis@xs4all.nl>
To: laurent@guerby.net
CC: gdb@sourceware.org
In-reply-to: <1235824612.11347.446.camel@localhost> (message from Laurent 	GUERBY on Sat, 28 Feb 2009 13:36:52 +0100)
Subject: Re: GDB 6.8 on sparc64-linux not working, idem on powerpc64-linux
References: <1235812429.11347.438.camel@localhost> <1235824612.11347.446.camel@localhost>
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> From: Laurent GUERBY <laurent@guerby.net>
> Date: Sat, 28 Feb 2009 13:36:52 +0100
> 
> (gdb) b main
> Breakpoint 1 at 0x1000044c: file toto.c, line 1.
> (gdb) r
> Starting program: /home/guerby/tmp/a.out 
> warning: no loadable sections found in added symbol-file system-supplied DSO at 0x100000
> 
> Program received signal SIGTRAP, Trace/breakpoint trap.
> 0x1000044c0002d032 in ?? ()
> (gdb) bt
> #0  0x1000044c0002d032 in ?? ()
> #1  0x0007d5a400000000 in ?? ()
> Cannot access memory at address 0xfffff4f010018940
> (gdb) n
> Cannot find bounds of current function

This (and the sparc64 issue) smells like a mismatch between bitness of
gdb and the program you're trying to debug.  What does file(1) report
when you run it on your gdb binary and your program's binary?