Re: Writing regs to corefile

Jon Ringle
2005-04-26T00:13:54Z

On Monday 25 April 2005 17:45, Daniel Jacobowitz wrote:
> On Mon, Apr 25, 2005 at 04:51:09PM -0400, Jon Ringle wrote:
> > > > I can't seem to write directly to the core file register set from
> > > > within gdb (which is why I was hand editing the core file):
> > > > (gdb) set $r0 = 0xffffffe4
> > > > You can't do that without a process to debug.
> > >
> > > Yeah. This is a bit unfortunate. Maybe we should allow the loaded
> > > copy of the registers to be changed.
> >
> > I was looking at corelow.c to see if I could add a
> > core_ops.to_store_registers function to do just that. However, the first
> > problem I encountered is that the to_store_registers definition seems to
> > only have a regno parameter. How do I get access to the value of regno to
> > be stored?
>
> From the register cache. You probably don't need to do anything in
> your dummy to_store_registers routine.

Ok, I created a dummy to_store_registers and a dummy to_prepare_to_store in
corelow.c. Now I don't get the error message, but setting a register doesn't
seem to reflect a change:

(gdb) p/x $r0
$1 = 0xbee0244c
(gdb) set $r0=0x1234
(gdb) p/x $r0
$2 = 0xbee0244c