no such instructions: xsave, xsetbv, xrstor

Peter Wemm peter at
Sat Jul 21 22:05:28 UTC 2012

On Sat, Jul 21, 2012 at 10:55 AM, Arvydas Sidorenko <asido4 at> wrote:
> This is the output I get when building 10-CURRENT from HEAD:
> /usr/src/sys/amd64/amd64/cpu_switch.S: Assembler messages:
> /usr/src/sys/amd64/amd64/cpu_switch.S:128: Error: no such instruction:
> `xsave (%r8)'
> /usr/src/sys/amd64/amd64/cpu_switch.S:504: Error: no such instruction: `xsetbv'
> /usr/src/sys/amd64/amd64/cpu_switch.S:505: Error: no such instruction:
> `xrstor (%rbx)'
> $ uname -a
> FreeBSD slacker 9.0-RELEASE-p3 FreeBSD 9.0-RELEASE-p3 #0: Tue Jun 12

Is that a mistake?    We generally only support
buildkernel/installkernel type cross-builds from older releases.  Or
even sometimes older versions of head building later versions.

Peter Wemm - peter at; peter at; peter at; KI6FJV
"All of this is for nothing if we don't go to the stars" - JMS/B5
"If Java had true garbage collection, most programs would delete
themselves upon execution." -- Robert Sewell

More information about the freebsd-amd64 mailing list