dis -l

is used to disassemble kernel code and include source line information if available.

🔍 What dis -l Does in crash

  • dis stands for disassemble.
  • The -l option tells crash to include source code line numbers in the disassembly output, assuming the kernel was compiled with debugging symbols (like -g).

✅ Example Usage

crash> dis -l do_fork

This would:

  • Disassemble the do_fork function.
  • Show the corresponding source code line numbers alongside the assembly instructions.

🧠 Useful Notes

  • This is helpful for correlating assembly instructions with source code, especially when debugging crashes or analyzing performance.
  • If the kernel was not compiled with debug info, the -l option may not show line numbers.

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