[PATCH] x86-64: fix ZMM register state tracking

Pedro Alves palves@redhat.com
Tue Sep 11 10:34:00 GMT 2018


On 09/05/2018 02:22 PM, Jan Beulich wrote:
> The three AVX512 state components are entirely independent - one being
> in its "init state" has no implication whatsoever on either of the other
> two. Fully separate X86_XSTATE_ZMM_H and X86_XSTATE_ZMM handling, to
> prevent upper halves of the upper 16 ZMM registers to display as if they
> were zero (when they aren't) after e.g. VZEROALL/VZEROUPPER.
> 
> gdb/
> 2018-09-05  Jan Beulich  <jbeulich@suse.com>
> 
> 	* i387-tdep.c (i387_supply_xsave): Split handling of
> 	X86_XSTATE_ZMM_H and X86_XSTATE_ZMM.
> 	(i387_collect_xsave): Likewise.

Does gdb/gdbserver/i387-fp.c need similar treatment?

Thanks,
Pedro Alves



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