3.1. GDB step debug kernel boot
--gdb-wait makes QEMU and gem5 wait for a GDB connection, otherwise we could accidentally go past the point we want to break at:
./run --gdb-wait
Say you want to break at start_kernel. So on another shell:
./run-gdb start_kernel
or at a given line:
./run-gdb init/main.c:1088
Now QEMU will stop there, and you can use the normal GDB commands:
list next continue
See also: