GDB Commands

GDB basic commands, classified with respect to their purpose.

Program Flow

• next step one line over.
• continue or c: continue executing up to next break point.
• break fn_name: break point at function name.
  • There may be many with same name. So we need the path.
    • For example: break gdb_hello_world::__risc_v_rt__main
• break lineno: break point at line number of currently-focused file.
  • Example: break 19, or br 19.
• break my_file.rs:lineno: example break main.rs:17.
• monitor reset halt: restarts and halts it.
• load: if we only use cargo build, then we can flash using load.
  • Within gdb type load. It'll flash the file to the MCU.

Layout

• layout src: shows source code and CLI.
• layout asm: shows assembly source and CLI.
• tui disable: to disable the layout.

Overviews

• info break: to show breakpoints
• info locals: to show variables.
• print x: to print variable x. Also print &x prints the address of x.
• list or list main: will show our program with numbered lines.