gdb/doc/

2008-08-12  Sandra Loosemore  <sandra@codesourcery.com>

	* gdb.texinfo (Remote Configuration): Document set remote noack-packet.
	(Remote Protocol): Add Packet Acknowledgment to menu.
	(Overview): Mention +/- can be disabled, and point to new section
	where this is discussed in detail.
	(General Query Packets): Document QStartNoAckMode packet, and
	corresponding qSupported reply.
	(Packet Acknowledgment): New section.

gdb/
2008-08-12  Pedro Alves  <pedro@codesourcery.com>

	Add no-ack mode to the remote protocol --- optionally stop ACKing
	packets and responses when we have a reliable communication
	medium.

	Based on Apple's GDB, by Jason Molenda <jmolenda@apple.com>

	* remote.c (struct remote_state): Add noack_mode field.
	(PACKET_QStartNoAckMode): New.
	(remote_start_remote): Don't any outstanding packet here.
	(remote_open_1): Clear noack_mode.  Ack any outstanding packet
	here.  Activate noack mode if requested.
	(remote_protocol_features): Add QStartNoAckMode.
	(remote_open_1):
	(putpkt_binary): Don't send ack in noack mode.
	(read_frame): Don't recompute the checksum in noack mode.
	(getpkt_sane): Skip sending ack if in noack mode.
	(_initialize_remote): Add set/show remote noack mode.
	* NEWS:  Note the new features.

gdb/gdbserver/
2008-08-12  Pedro Alves  <pedro@codesourcery.com>

	* remote-utils.c (noack_mode, transport_is_reliable): New globals.
	(remote_open): Set or clear transport_is_reliable.
	(putpkt_binary): Don't expect acks in noack mode.
	(getpkt): Don't send ack/nac in noack mode.
	* server.c (handle_general_set): Handle QStartNoAckMode.
	(handle_query): If connected by tcp pass QStartNoAckMode+ in
	qSupported.
	(main): Reset noack_mode on every connection.
	* server.h (noack_mode): Declare.

gdb/gdbserver/server.h

@@ -175,6 +175,8 @@ extern void hostio_last_error_from_errno (char *own_buf);
 
 extern int remote_debug;
 extern int all_symbols_looked_up;
+extern int noack_mode;
+extern int transport_is_reliable;
 
 int putpkt (char *buf);
 int putpkt_binary (char *buf, int len);