On Mon, Jan 31, 2022 at 09:02:17PM -0500, Stefan Monnier wrote:
Greg Wooledge [2022-01-31 16:45:52] wrote:
On Mon, Jan 31, 2022 at 04:37:37PM -0500, Stefan Monnier wrote:
BTW, for the twisted-minded it's probably possible to run a 64bit
userspace on a 32bit kernel.
No. Or at least, not that I've ever heard of. If technology has been
invented to make this possible, it's new to me.
I don't think there's any need to invent anything for that. I don't see
anything particularly hard about emulating a 64bit instruction set on
a 32bit system. Performance may not be great, but that's a secondary concern.
that's not running a 64bit userspace on a 32bit kernel, that's running a
64bit userspace on an emulator running in 32bit userspace on a 32bit kernel
this is unlike running the i386 userspace on an amd64 kernel (something
that's not particularly uncommon and has certain advantages)--you cannot
run the amd64 userspace on an i386 kernel
linux was not the first to do that, and many systems let you run
binaries from an older version on a newer version, but I'm not aware of
any that worked the other way around
