The GNU debugger (gdb)

The GNU debugger is a command-line program that provides a very rich set of options.

You'll find a tutorial-style doc called Using GDB as an appendix in this manual.

You can invoke gdb by using the following variants, which correspond to your target platform:

For this target: Use this command:
AArch64 ntoaarch64-gdb
ARMv7 ntoarmv7-gdb
x86 ntox86-gdb
x86 64-bit ntox86_64-gdb

For more information, see the gdb entry in the Utilities Reference.