gdbserver: turn target op 'supports_software_single_step' into a method

gdbserver/ChangeLog:
2020-02-20  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

	Turn process_stratum_target's supports_software_single_step op
	into a method of process_target.

	* target.h (struct process_stratum_target): Remove the target op.
	(class process_target): Add the target op.
	(target_supports_software_single_step): Update the macro.
	* target.cc (process_target::supports_software_single_step): Define.

	Update the derived classes and callers below.

	* linux-low.cc (linux_target_ops): Update.
	(linux_supports_software_single_step): Turn into ...
	(linux_process_target::supports_software_single_step): ... this.
	* linux-low.h (class linux_process_target): Update.
	* lynx-low.cc (lynx_target_ops): Update.
	* nto-low.cc (nto_target_ops): Update.
	* win32-low.cc (win32_target_ops): Update.

1 files changed, 6 insertions, 0 deletions

diff --git a/gdbserver/target.cc b/gdbserver/target.cc
index b7ed26b22f4..b1a28e68cc0 100644
--- a/gdbserver/target.cc
+++ b/gdbserver/target.cc
@@ -814,3 +814,9 @@ process_target::thread_handle (ptid_t ptid, gdb_byte **handle,
 {
   return false;
 }
+
+bool
+process_target::supports_software_single_step ()
+{
+  return false;
+}