LLDB FreeBSD Kernel Module Improvement By: ShengYi Hung

This talk introduces the low level debugger (LLDB) kernel module debug facility for the FreeBSD kernel. The current functional status of LLDB within the FreeBSD kernel is attributed to contributions from [1] and the collaborative efforts of the community. Key functionalities include core dump parsing and memory context building for the coredump, specifically integrated into the process plugin within LLDB for the FreeBSD kernel.
This enhancement equips LLDB for effective post-mortem debugging on the FreeBSD kernel. While the implementation of the process plugin has been successfully completed, the paper emphasizes the imperative need to implement the DynamicLoader plugin for the kernel loader.
This plugin plays a critical role in loading the symbol file of the kernel module, ensuring comprehensive parsing of symbols for loadable kernel modules.
Additionally, given the potential existence of the kernel module as either a relocatable file (for x86) or a shared object (for ARM), the implementation should confirms the usability of both types of ELF format kernel modules.