[PATCH 2/2] Support single step by arch or target

[Eli Zaretskii]

> From: Yao Qi <qiyaoltc@gmail.com>
> Date: Tue,  1 Sep 2015 09:41:55 +0100
> 
> gdb:
> 
> 2015-09-01  Yao Qi  <yao.qi@linaro.org>
> 
> 	* aarch64-linux-nat.c (aarch64_linux_can_do_single_step): New
> 	function.
> 	(_initialize_aarch64_linux_nat): Install it to to_can_do_single_step.
> 	* arm-linux-tdep.c (arm_linux_software_single_step): Return 0
> 	if target_can_do_single_step returns 1.
> 	* remote.c (struct vCont_action_support) <s, S>: New fields.
> 	(PACKET_vContSupported): New enum.
> 	(remote_protocol_features): New element for vContSupported.
> 	(remote_query_supported): Append "vContSupported+".
> 	(remote_vcont_probe): Remove support_s and support_S, use
> 	rs->supports_vCont.s and rs->supports_vCont.S instead.  Disable
> 	vCont packet if c and C actions are not supported.
> 	(remote_can_do_single_step): New function.
> 	(init_remote_ops): Install it to to_can_do_single_step.
> 	(_initialize_remote): Call add_packet_config_cmd.
> 	* target.h (struct target_ops) <to_can_do_single_step>: New field.
> 	(target_can_do_single_step): New macro.
> 	* target-delegates.c: Re-generated.
> 
> gdb/gdbserver:
> 
> 2015-09-01  Yao Qi  <yao.qi@linaro.org>
> 
> 	* server.c (vCont_supported): New global variable.
> 	(handle_query): Set vCont_supported to 1 if "vContSupported+"
> 	matches.  Append ";vContSupported+" to own_buf.
> 	(handle_v_requests): Append ";s;S" to own_buf if target supports
> 	hardware single step or vCont_supported is false.
> 	(capture_main): Set vCont_supported to zero.
> 
> gdb/doc:
> 
> 2015-09-01  Yao Qi  <yao.qi@linaro.org>
> 
> 	* gdb.texinfo (General Query Packets): Add vContSupported to
> 	tables of 'gdbfeatures' and 'stub features' supported in the
> 	qSupported packet, as well as to the list containing stub
> 	feature details.

OK for the documentation part.

Thanks.