Thanks for pointing out the issues. I will track down the white space problem.
I could reconstruct it from that pastebin. But it was a bit of a struggle, some parts didn't apply as is because tabs seemed to be turned into spaces. I tried to repost it to the list. But the first time it was bounced as "spam" and the second time after removing the git-bin-diffs sourceware seemed to accept it, but then it never showed up on the list. (See below for the logs on my end.)
I have the same frame pointer unwinding fallbacks for arm and arm64 in the elfutils bundled with perfparser. I just need to write test cases for them, then I will post them, too. So, it's probably a good idea to either have the mailing list accept patches with inline binaries or allow some other channel of patch submission. br, Ulf