This is the mail archive of the
gdb@sourceware.org
mailing list for the GDB project.
Re: Setting an SSE register to a certain value
> Date: Tue, 27 Dec 2005 16:15:59 -0800
> From: Jim Blandy <jimb@red-bean.com>
> Cc: gdb@sources.redhat.com
>
> On 12/27/05, Guillaume POIRIER <poirierg@gmail.com> wrote:
> > I'm trying to find a solution to set an XMM register to a certain value.
> >
> > I've tried
> > set $xmm2 = 0x000000000000000000000000FFFFFFFF
> > but I get the error message: "Invalid cast."
> > and I also tried:
> > set $xmm2 = (unint128) 0x000000000000000000000000FFFFFFFF
> > but I get the message the message "No symbol "uint128" in current context."
> >
> > I've googled around and dig the mailing without finding a solution to
> > this problem.
>
> If you say "print $xmm", don't you get a structure type? GDB is
> complaining that it doesn't know how to convert the 128-bit constant
> you wrote to the register's structure type. Try assigning to the
> individual elements of one of the structure's members.
That is, try this:
set $xmm2.uint128 = 0x000000000000000000000000FFFFFFFF