/proc/kallsyms − kernel exported symbols
/proc/kallsyms (since Linux 2.5.71)
This holds the kernel exported symbol definitions used by the modules(X) tools to dynamically link and bind loadable modules. In Linux 2.5.47 and earlier, a similar file with slightly different syntax was named ksyms.
/proc/ksyms (Linux 1.1.23–2.5.47)
See /proc/kallsyms.
proc(5)