17.6.1.1. Kernel module stack trace to source line
The log shows which module each symbol belongs to if any, e.g.:
myinit+0x1d/0x20 [panic]
says that the function myinit is in the module panic.
To find the line that panicked, do:
./run-gdb
and then:
info line *(myinit+0x1d)
which gives us the correct line:
Line 7 of "/root/linux-kernel-module-cheat/out/kernel_modules/x86_64/kernel_modules/panic.c" starts at address 0xbf00001c <myinit+28> and ends at 0xbf00002c <myexit>.
as explained at: https://stackoverflow.com/questions/8545931/using-gdb-to-convert-addresses-to-lines/27576029#27576029
The exact same thing can be done post mortem with:
./run-toolchain gdb -- \ -batch \ -ex 'info line *(myinit+0x1d)' \ "$(./getvar kernel_modules_build_subdir)/panic.ko" \ ;
Related: