Need Some (Possibly) Lower-Level Help! (armv6hl bootstrapping)

[Jon Chiappetta]

Hey everyone,

As you may or may not know, I've been assigned the task of trying to bring up a
semi-new arch for the rasp pi. I think this is a bit too much for me to handle as I am not
a programmer and when things go wrong besides package build failures, I get stuck pretty
easily. So my status is, I've been using a mixture of rpmbuild && mock on an
armv7hl machine to compile around 750+ core packages and I've been using rpmrc
&& macro files which contain the following compiler flags:

... -march=armv6 -mfloat-abi=hard -mfpu=vfp ...

With my initial set of packages, I tried to install them on a armv5 rasp pi using this
command:

rpm --force --ignorearch --nodeps --root /root/f17arm6hl/ -i ./repo/*

The first sign that something must have gone wrong was all the "%post" scriplet
warnings that were being displayed during the rootdir install. Once rpm finished, I tried
to chroot into that directory to see if it would run. The result is the following:

[root@raspi ~]# chroot /root/ f17arm6hl/
Illegal instruction
[root@raspi ~]#

As you can see, this is where the problem suddenly goes way above my head. I don't
know much about how to debug what's really going on here but it seems like I may have
compiled a possible library or binary with a v7hl instruction? Not sure how to check for
that though... Could it be that chroot'ing into a v6hl directory from a v5 rasp pi is
preventing some sort of initial machine code symbol lookup to fail? If there's anyone
who has any recommendations on how I could debug or backtrack this on a lower-level maybe
I'd be really interested in hearing any suggestions you have. Maybe my whole approach
in trying to load or bootstrap these initial packages is wrong, I'm not sure.

I did try to perform an objectdump of a sample v6hl binary (/bin/rpm) to see if there were
any instruction/op code complaints and there did exist some lines which contained the
following ( http://pastebin.com/WmK9tQJt ) :<http://pastebin.com/WmK9tQJt>

[root@raspi ~]# objdump -d /root/f17v6hl/bin/rpm
...
    98c4:       00000afc        strdeq  r0, [r0], -ip
    98c8:       000007b4                        ; <UNDEFINED> instruction:
0x000007b4
    98cc:       00000bdc        ldrdeq  r0, [r0], -ip
...



So I'm stuck and need some advice. If you need any other files posted or commands run
to help try and debug this let me know!

Thanks for your time,

Jon Chiappetta