st-util

Start GDB server

$ st-util

$ st-util -p [4242]

$ st-util -v

$ st-util -m

$ st-util --serial [serial-number]

st-util [-p port] [-v] [-m] [options]

st-util starts a GDB server that bridges the GNU Debugger (GDB) to STM32 microcontrollers through an ST-Link programmer/debugger. It implements the GDB remote serial protocol, allowing standard GDB commands for setting breakpoints, stepping through code, and inspecting memory and registers.
By default, the server listens on port 4242 for GDB connections. Multi-target mode (-m) supports debugging multiple ST-Link devices simultaneously. Semihosting enables the target firmware to perform I/O operations (such as printf) through the debug connection. It is part of the open-source stlink toolset.

-p PORT

GDB server port.

Verbose output.

Multi-target mode.

Device serial.

Enable semihosting.

No reset on connect.

ST-Link required. One device by default. Port must be free.

st-util is part of stlink, providing a GDB server for debugging STM32 microcontrollers via ST-Link.

st-flash(1), st-info(1), gdb(1), openocd(1)