Here is the beginning of a dump of information on the Black Armor device from the Linux kernel and environment. From this I learned the processor type and features. I also got some pointers to cross-compiler options used. These will all be important later.
$ uname -a
Linux NAS3 2.6.22.18 #1 Thu Aug 26 12:26:10 CST 2010 v0.0.8 armv5tejl unknown
$ cat /proc/cpuinfo
Processor : ARM926EJ-S rev 1 (v5l)
BogoMIPS : 794.62
Features : swp half thumb fastmult edsp
CPU implementer : 0x56
CPU architecture: 5TE
CPU variant : 0x2
CPU part : 0x131
CPU revision : 1
Cache type : write-back
Cache clean : cp15 c7 ops
Cache lockdown : format C
Cache format : Harvard
I size : 16384
I assoc : 4
I line length : 32
I sets : 128
D size : 16384
D assoc : 4
D line length : 32
D sets : 128
Hardware : Feroceon-KW
Revision : 0000
Serial : 0000000000000000
$ cat kmsg
<5>Linux version 2.6.22.18 (root@jasonDev.localdomain) (gcc version 4.2.1) #1 Thu Aug 26 12:26:10 CST 2010 v0.0.8
<4>CPU: ARM926EJ-S [56251311] revision 1 (ARMv5TE), cr=00053977
<4>Machine: Feroceon-KW
<4> Marvell Development Board (LSP Version KW_LSP_4.2.7_patch21_with_rx_desc_tuned)-- MONO Soc: 88F6192 A1 LE
$ dmesg
... way too much stuff ...