Features/gdbstub

QEMU support a gdbserver known as the gdbstub. With this you can debug programs in both linux-user and system emulation modes.

Invoking

   $QEMU $QEMU_ARGS -s -S

Will configure the system and stop at the first instruction. You can then attach with:

   gdb $BINARY -ex "target remote localhost:1234"

and debug your program

The gdbstub doesn't support all the features of the gdbserver protocol which is documented here