backward lookup hasn't enough steps

[screwer]

Kernel from Nokia7 failed to process with exception 'This structure is not a kallsyms_token_table'
Simple increase '20' to '50' solves the problem. But it is dirty hack (i haven't enough time to solve cause.

Example kernel binary: http://omegahg.com/temp/kernel.7z

[marin-m]

Thanks. Indeed Nokia seems to use some fancy long method symbol prefixes. Tested on my dataset and fixed in commit e822b28