Well, in general terms, you got an iOS Kernel Panic. It looks like it was approximately 0.8 seconds into the process and it encountered the problem. I don't read kernel panic logs, but someone who is into kernel panics probably could for you. It looks like the OS had not loaded yet, as it does not even have the version number yet.
The date you see is related to the Darwin Kernel Version ... associated with iOS 8.
If you want to gain a "sense" of what this kernel panic log is about ... and it's only about "impressions" of what it's about, here are some links to start giving you some impressions ...
https://developer.apple.com/library/mac/technotes/tn2063/_index.html
http://books.google.com/books?id=bzZO64m3iS0C&pg=PA340&lpg=PA340&dq=ios+kernel+p anic+log
http://saelo.net/files/attacking_iOS_kernel-1.pdf
http://hostsv.us/books/os_x_and_ios_kernel_programming.pdf
http://www.beijingiphonerepair.com/fix/how-to-check-for-hardware-error-on-iphone -4s-quickly-and-easily/
https://www.google.com/webhp?hl=en#hl=en&q=ios+kernel+panic
AND this "may" be indicative of a hardware failure, again ... "maybe". One of the articles I was looking at said that if a customer brings in an iOS device with a kernel panic log showing up, the support person at Apple usually will consider this (existence of the log) as qualifying for an exchange for a new device.