[v2,04/58] gdbserver: turn target op 'attach' into a method

diff --git a/gdbserver/linux-low.cc b/gdbserver/linux-low.cc
index 2e3daa2733f..aae29306df6 100644
--- a/gdbserver/linux-low.cc
+++ b/gdbserver/linux-low.cc
@@ -1181,8 +1181,8 @@  static void async_file_mark (void);
 /* Attach to PID.  If PID is the tgid, attach to it and all
    of its threads.  */
 
-static int
-linux_attach (unsigned long pid)
+int
+linux_process_target::attach (unsigned long pid)
 {
   struct process_info *proc;
   struct thread_info *initial_thread;
@@ -7359,7 +7359,6 @@  linux_get_hwcap2 (int wordsize)
 static linux_process_target the_linux_target;
 
 static process_stratum_target linux_target_ops = {
-  linux_attach,
   linux_kill,
   linux_detach,
   linux_mourn,
diff --git a/gdbserver/linux-low.h b/gdbserver/linux-low.h
index 870a0d4d863..5458a9b99b9 100644
--- a/gdbserver/linux-low.h
+++ b/gdbserver/linux-low.h
@@ -274,6 +274,8 @@  public:
 		       const std::vector<char *> &program_args) override;
 
   void post_create_inferior () override;
+
+  int attach (unsigned long pid) override;
 };
 
 #define get_thread_lwp(thr) ((struct lwp_info *) (thread_target_data (thr)))
diff --git a/gdbserver/lynx-low.cc b/gdbserver/lynx-low.cc
index d9f96de70f6..60abc75d8da 100644
--- a/gdbserver/lynx-low.cc
+++ b/gdbserver/lynx-low.cc
@@ -309,8 +309,8 @@  lynx_add_threads_after_attach (int pid)
 
 /* Implement the attach target_ops method.  */
 
-static int
-lynx_attach (unsigned long pid)
+int
+lynx_process_target::attach (unsigned long pid)
 {
   ptid_t ptid = lynx_ptid_t (pid, 0);
 
@@ -726,7 +726,6 @@  static lynx_process_target the_lynx_target;
 /* The LynxOS target_ops vector.  */
 
 static process_stratum_target lynx_target_ops = {
-  lynx_attach,
   lynx_kill,
   lynx_detach,
   lynx_mourn,
diff --git a/gdbserver/lynx-low.h b/gdbserver/lynx-low.h
index 66cfdfa870c..142a774011c 100644
--- a/gdbserver/lynx-low.h
+++ b/gdbserver/lynx-low.h
@@ -60,6 +60,8 @@  public:
 
   int create_inferior (const char *program,
 		       const std::vector<char *> &program_args) override;
+
+  int attach (unsigned long pid) override;
 };
 
 /* The inferior's target description.  This is a global because the
diff --git a/gdbserver/nto-low.cc b/gdbserver/nto-low.cc
index c295be732df..77b5fce4c50 100644
--- a/gdbserver/nto-low.cc
+++ b/gdbserver/nto-low.cc
@@ -385,8 +385,8 @@  nto_process_target::create_inferior (const char *program,
 
 /* Attach to process PID.  */
 
-static int
-nto_attach (unsigned long pid)
+int
+nto_process_target::attach (unsigned long pid)
 {
   TRACE ("%s %ld\n", __func__, pid);
   if (do_attach (pid) != pid)
@@ -935,7 +935,6 @@  nto_sw_breakpoint_from_kind (int kind, int *size)
 static nto_process_target the_nto_target;
 
 static process_stratum_target nto_target_ops = {
-  nto_attach,
   nto_kill,
   nto_detach,
   nto_mourn,
diff --git a/gdbserver/nto-low.h b/gdbserver/nto-low.h
index 3bad08b82ac..f6faacb425e 100644
--- a/gdbserver/nto-low.h
+++ b/gdbserver/nto-low.h
@@ -50,6 +50,8 @@  public:
 
   int create_inferior (const char *program,
 		       const std::vector<char *> &program_args) override;
+
+  int attach (unsigned long pid) override;
 };
 
 /* The inferior's target description.  This is a global because the
diff --git a/gdbserver/target.h b/gdbserver/target.h
index 87036e83846..bd99737d4f1 100644
--- a/gdbserver/target.h
+++ b/gdbserver/target.h
@@ -70,16 +70,6 @@  class process_target;
    shared code.  */
 struct process_stratum_target
 {
-  /* Attach to a running process.
-
-     PID is the process ID to attach to, specified by the user
-     or a higher layer.
-
-     Returns -1 if attaching is unsupported, 0 on success, and calls
-     error() otherwise.  */
-
-  int (*attach) (unsigned long pid);
-
   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 
   int (*kill) (process_info *proc);
@@ -489,6 +479,15 @@  public:
   /* Do additional setup after a new process is created, including
      exec-wrapper completion.  */
   virtual void post_create_inferior ();
+
+  /* Attach to a running process.
+
+     PID is the process ID to attach to, specified by the user
+     or a higher layer.
+
+     Returns -1 if attaching is unsupported, 0 on success, and calls
+     error() otherwise.  */
+  virtual int attach (unsigned long pid) = 0;
 };
 
 extern process_stratum_target *the_target;
@@ -502,7 +501,7 @@  void set_target_ops (process_stratum_target *);
   the_target->pt->post_create_inferior ()
 
 #define myattach(pid) \
-  (*the_target->attach) (pid)
+  the_target->pt->attach (pid)
 
 int kill_inferior (process_info *proc);
 
diff --git a/gdbserver/win32-low.cc b/gdbserver/win32-low.cc
index a9b1bfb2fd6..0e7c1640522 100644
--- a/gdbserver/win32-low.cc
+++ b/gdbserver/win32-low.cc
@@ -726,8 +726,8 @@  win32_process_target::create_inferior (const char *program,
 /* Attach to a running process.
    PID is the process ID to attach to, specified by the user
    or a higher layer.  */
-static int
-win32_attach (unsigned long pid)
+int
+win32_process_target::attach (unsigned long pid)
 {
   HANDLE h;
   winapi_DebugSetProcessKillOnExit DebugSetProcessKillOnExit = NULL;
@@ -1839,7 +1839,6 @@  win32_sw_breakpoint_from_kind (int kind, int *size)
 static win32_process_target the_win32_target;
 
 static process_stratum_target win32_target_ops = {
-  win32_attach,
   win32_kill,
   win32_detach,
   win32_mourn,
diff --git a/gdbserver/win32-low.h b/gdbserver/win32-low.h
index c922d735068..fd6662dcab2 100644
--- a/gdbserver/win32-low.h
+++ b/gdbserver/win32-low.h
@@ -109,6 +109,8 @@  public:
 
   int create_inferior (const char *program,
 		       const std::vector<char *> &program_args) override;
+
+  int attach (unsigned long pid) override;
 };
 
 /* Retrieve the context for this thread, if not already retrieved.  */