[librm] Allow interrupts in protected mode

When running in a virtual machine, switching to real mode may be
expensive.  Allow interrupts to be enabled while in protected mode and
reflected down to the real-mode interrupt handlers.

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/core/gdbstub.c

@@ -396,5 +396,6 @@ struct gdb_transport *find_gdb_transport ( const char *name ) {
 void gdbstub_start ( struct gdb_transport *trans ) {
 	stub.trans = trans;
 	stub.payload = &stub.buf [ 1 ];
+	gdbmach_init();
 	gdbmach_breakpoint();
 }