[GDB] Provide functions to manually enter GDB stub.

src/include/gpxe/gdbserial.h

@@ -0,0 +1,19 @@
+#ifndef _GPXE_GDBSERIAL_H
+#define _GPXE_GDBSERIAL_H
+
+/** @file
+ *
+ * GDB remote debugging over serial
+ *
+ */
+
+struct gdb_transport;
+
+/**
+ * Set up the serial transport
+ *
+ * @ret transport suitable for starting the GDB stub or NULL on error
+ */
+struct gdb_transport *gdbserial_configure ( void );
+
+#endif /* _GPXE_GDBSERIAL_H */

src/include/gpxe/gdbudp.h

@@ -0,0 +1,22 @@
+#ifndef _GPXE_GDBUDP_H
+#define _GPXE_GDBUDP_H
+
+/** @file
+ *
+ * GDB remote debugging over UDP
+ *
+ */
+
+struct sockaddr_in;
+struct gdb_transport;
+
+/**
+ * Set up the UDP transport with network address
+ *
+ * @name network device name
+ * @addr IP address and UDP listen port, may be NULL and fields may be zero
+ * @ret transport suitable for starting the GDB stub or NULL on error
+ */
+struct gdb_transport *gdbudp_configure ( const char *name, struct sockaddr_in *addr );
+
+#endif /* _GPXE_GDBUDP_H */