postinst-intercepts, qemu.bbclass: fix issue on 32 bit hosts

The intercept scripts fail to run on 32 bit hosts. Apparently, the
current approach worked on 64 bit hosts due to the larger virtual address
space (probably). On 32 bit hosts, however, calling the target binary like:

qemu-arm ld-linux.so --library-path /lib:/usr/lib arm_binary

fails with:

arm_binary: error while loading shared libraries: arm_binary: failed to
map segment from shared object: Operation not permitted

When run like this, qemu-arm fails to map the arm_binary executable in
memory because it's hitting the lower limit of
/proc/sys/vm/mmap_min_addr. That's because it loads the
ld-linux.so binary successfully, taking into account mmap_min_addr, runs
it, and then ld-linux.so will map the arm_binary at a fixed address but this
will fail because it is below mmap_min_addr. The qemu's guest base probing,
apparently, doesn't work fine when a program runs inside other.

One way around this would be to set mmap_min_addr to 0 (on recent
distributions is set to 65536 to avoid "kernel NULL pointer dereference"
defects) but this approach is not safe.

The other way is to call the binary directly but providing qemu with a
prefix (-L option) in order to find the elf interpreter correctly. This
way, both the target binary and dynamic loader are mapped into memory
under qemu's control and, only after, the dynamic loader is started.

[YOCTO #4179]

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
lib/oe/classextend.py: avoid extending any kernel package

For multilib and other uses of classextend, we don't want any
dependencies on kernel packages to be extended since there should only
be one kernel variant.

Fixes [YOCTO #2918] (where kernel-dev was being extended.)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
connman_test.sh: show all processes when dumping ps

We know the grep failed because the error case is being executed, so don't do
the grep again when attempting to help diagnose the problem, as seeing the full
process list might be useful.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
qemuimage-testlib: silence some key warnings

Set StrictHostKeyChecking to no to silence the fingerprint warnings, and instead
of creating a temporary file for the known hosts and then deleting it just use
/dev/null.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
qemuimage-testlib: add function to fetch the remote syslog

Add a new function to scp from the target, and another to fetch
/var/log/messages and dump it to the console.

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
sanity/connman: when connman test fails, dump syslog

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>