qemu-arm-static: bsd-user/arm/target_syscall.h: #define TARGET_HW_MACHINE_ARCH "armv6" // what of armv7?

[Mark Millard]

On 2018-Nov-12, at 20:58, Kyle Evans <kevans at freebsd.org> wrote:

> On Mon, Nov 12, 2018 at 10:41 PM Mark Millard <marklmi at yahoo.com> wrote:
>> 
>> 11.x:
>> o 11.2-STABLE armv6 BANANAPI
>> o 11.2-STABLE armv6 BEAGLEBONE
>> o 11.2-STABLE armv6 CUBIEBOARD
>> o 11.2-STABLE armv6 CUBIEBOARD2
>> o 11.2-STABLE armv6 CUBOX-HUMMINGBOARD
>> o 11.2-STABLE armv6 RPI-B
>> o 11.2-STABLE armv6 RPI2
>> o 11.2-STABLE armv6 PANDABOARD
>> o 11.2-STABLE armv6 WANDBOARD
>> 
>> 12.x+ (I got the list from a 13.0 snapshot announcement):
>> o 13.0-CURRENT armv6 RPI-B
>> o 13.0-CURRENT armv7 BANANAPI
>> o 13.0-CURRENT armv7 BEAGLEBONE
>> o 13.0-CURRENT armv7 CUBIEBOARD
>> o 13.0-CURRENT armv7 CUBIEBOARD2
>> o 13.0-CURRENT armv7 CUBOX-HUMMINGBOARD
>> o 13.0-CURRENT armv7 RPI2
>> o 13.0-CURRENT armv7 PANDABOARD
>> o 13.0-CURRENT armv7 WANDBOARD
>> o 13.0-CURRENT armv7 GENERICSD
>> 
>> So as of 12.x+ most are armv7 --as are most new ones
>> expected to be.
>> 
>> As stands, in my amd64 -> armv7 13.0 cross-build activity,
>> uname -p and the like under the chroot context are
>> returning armv6 instead of armv7 unless I override via
>> a UNAME_p definition.
>> 
>> This appears to trace back to: bsd-user/arm/target_syscall.h
>> and its:
>> 
>> #define TARGET_HW_MACHINE       "arm"
>> #define TARGET_HW_MACHINE_ARCH  "armv6"
>> 
>> and lack context sensitivity, such as to the FreeBSD version
>> that it is in use under.
>> 
> 
> Indeed, I opened this a couple of hours ago:
> https://github.com/seanbruno/qemu-bsd-user/pull/70 -- It turns out
> this is basically wrong, though I'm not sure immediately how to
> rectify. I don't think we can reasonably decide at compile-time what
> this should look like since all 32-bit ARM are shoved into this one
> target, so perhaps the right answer is that armv6 and armv7 need to
> split off from arm.arm and we use a check like the one in the above
> PR. CC'ing imp for a wisdom drop.

Looks like poudriere-devel is defining UNAME_p and UNAME_m to cause
the right results for its port builds.

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)