Re: cross targeted gdb and corefiles

[Daniel Jacobowitz <drow@mvista.com>]

On Thu, May 16, 2002 at 04:28:33PM -0700, Kevin Squail Endres wrote:
> Yep - shot the last mail off before thinking it all through (sorries!!) -
> Thanks for the help! (Got it all working!!)
> 
> TO RECAP: 
> My environment - i386 host - ARM target (both running linux)
> 
> goal - read target core files with cross targeted debugger in host
> environment.
> 
> SOLUTION:
> 1) configure cross gdb
> 2) add corelow.o and core-regset.o to TDEPFILES in gdb's Makefile
> 3) copy supply_* and nwfpe* functions and relevant structures (F11A etc)
> from arm-linux-nat.c to arm-linux-tdep.c
> 4) remove system headers from arm-linux-tdep.c and core-regset.h (so not
> using system register defs in gregset.h)
> 5) edit gregset.h - add the following (at the top): (i just copied and
> synthisized from appt headers)
> 
> typedef  unsigned long elf_greg_t;
> typedef  elf_greg_t gregset[18];
> typedef struct {void *null } fpregset_t;

ARM folks - what's up with that void *null anyway?  <sys/procfs.h> has
a more relevant elf_fpregset_t, but I don't know if/how the kernel dumps
FPU registers; if it does it along the lines of that regset, nothing
makes sense...

> 
> 6) make
> 
> After getting environment set up same as required for remote debugging.
> 
> 7) gdb app
> 8) (gdb) set solib-absolute-prefix /targetloc
> 9) (gdb) target core core
> 
> and all works as expected!!!
> 
> Help is much appreciated - you guys rule!
> 
> :]k
> -----Original Message-----
> From: Kevin Buettner [mailto:kevinb@redhat.com]
> Sent: Thursday, May 16, 2002 4:17 PM
> To: Kevin "Squail" Endres; 'Kevin Buettner'; 'Daniel Jacobowitz';
> 'Richard.Earnshaw@arm.com '
> Cc: 'gdb@sources.redhat.com'
> Subject: Re: cross targeted gdb and corefiles
> 
> 
> On May 16,  4:05pm, Kevin \Squail\ Endres wrote:
> 
> > I know i have to set so-absolute-prefix to my libs to get everything to
> live
> > correctly... How do i do that and read in a core???
> 
> Can't you do...
> 
>     (gdb) set solib-absolute-prefix /my/prefix/to/the/sys-root
>     (gdb) target core core
> 
> ?
> 
> Kevin
> 

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer