[21/31] gdbserver/linux-low: turn 'prepare_to_resume' into a method

diff --git a/gdbserver/linux-aarch64-low.cc b/gdbserver/linux-aarch64-low.cc
index 1b5efd56168..cece3fc6dca 100644
--- a/gdbserver/linux-aarch64-low.cc
+++ b/gdbserver/linux-aarch64-low.cc
@@ -104,6 +104,8 @@  protected:
   void low_delete_thread (arch_lwp_info *) override;
 
   void low_new_fork (process_info *parent, process_info *child) override;
+
+  void low_prepare_to_resume (lwp_info *lwp) override;
 };
 
 /* The singleton target ops object.  */
@@ -124,6 +126,12 @@  aarch64_target::low_cannot_store_register (int regno)
 			  "is not implemented by the target");
 }
 
+void
+aarch64_target::low_prepare_to_resume (lwp_info *lwp)
+{
+  aarch64_linux_prepare_to_resume (lwp);
+}
+
 /* Per-process arch-specific data we want to keep.  */
 
 struct arch_process_info
@@ -3140,7 +3148,6 @@  aarch64_supports_hardware_single_step (void)
 
 struct linux_target_ops the_low_target =
 {
-  aarch64_linux_prepare_to_resume,
   NULL, /* process_qsupported */
   aarch64_supports_tracepoints,
   aarch64_get_thread_area,
diff --git a/gdbserver/linux-arm-low.cc b/gdbserver/linux-arm-low.cc
index cc2f3919e27..83a7608c787 100644
--- a/gdbserver/linux-arm-low.cc
+++ b/gdbserver/linux-arm-low.cc
@@ -111,6 +111,8 @@  protected:
   void low_delete_thread (arch_lwp_info *) override;
 
   void low_new_fork (process_info *parent, process_info *child) override;
+
+  void low_prepare_to_resume (lwp_info *lwp) override;
 };
 
 /* The singleton target ops object.  */
@@ -815,8 +817,8 @@  arm_target::low_new_fork (process_info *parent, process_info *child)
 
 /* Called when resuming a thread.
    If the debug regs have changed, update the thread's copies.  */
-static void
-arm_prepare_to_resume (struct lwp_info *lwp)
+void
+arm_target::low_prepare_to_resume (lwp_info *lwp)
 {
   struct thread_info *thread = get_lwp_thread (lwp);
   int pid = lwpid_of (thread);
@@ -1117,7 +1119,6 @@  arm_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  arm_prepare_to_resume,
   NULL, /* process_qsupported */
   NULL, /* supports_tracepoints */
   NULL, /* get_thread_area */
diff --git a/gdbserver/linux-bfin-low.cc b/gdbserver/linux-bfin-low.cc
index 21facb24cd0..82bae1d1e82 100644
--- a/gdbserver/linux-bfin-low.cc
+++ b/gdbserver/linux-bfin-low.cc
@@ -165,7 +165,6 @@  bfin_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* prepare_to_resume */
   NULL, /* process_qsupported */
   NULL, /* supports_tracepoints */
   NULL, /* get_thread_area */
diff --git a/gdbserver/linux-crisv32-low.cc b/gdbserver/linux-crisv32-low.cc
index 1397603ee36..b85eac87698 100644
--- a/gdbserver/linux-crisv32-low.cc
+++ b/gdbserver/linux-crisv32-low.cc
@@ -470,7 +470,6 @@  crisv32_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* prepare_to_resume */
   NULL, /* process_qsupported */
   NULL, /* supports_tracepoints */
   NULL, /* get_thread_area */
diff --git a/gdbserver/linux-low.cc b/gdbserver/linux-low.cc
index 50addb9d68e..41bb44a2010 100644
--- a/gdbserver/linux-low.cc
+++ b/gdbserver/linux-low.cc
@@ -1530,8 +1530,7 @@  linux_process_target::detach_one_lwp (lwp_info *lwp)
       regcache_invalidate_thread (thread);
 
       /* Finally, let it resume.  */
-      if (the_low_target.prepare_to_resume != NULL)
-	the_low_target.prepare_to_resume (lwp);
+      low_prepare_to_resume (lwp);
     }
   catch (const gdb_exception_error &ex)
     {
@@ -4322,8 +4321,7 @@  linux_process_target::resume_one_lwp_throw (lwp_info *lwp, int step,
 		  lwpid_of (thread), step ? "step" : "continue", signal,
 		  lwp->stop_expected ? "expected" : "not expected");
 
-  if (the_low_target.prepare_to_resume != NULL)
-    the_low_target.prepare_to_resume (lwp);
+  low_prepare_to_resume (lwp);
 
   regcache_invalidate_thread (thread);
   errno = 0;
@@ -4355,6 +4353,12 @@  linux_process_target::resume_one_lwp_throw (lwp_info *lwp, int step,
   lwp->stop_reason = TARGET_STOPPED_BY_NO_REASON;
 }
 
+void
+linux_process_target::low_prepare_to_resume (lwp_info *lwp)
+{
+  /* Nop.  */
+}
+
 /* Called when we try to resume a stopped LWP and that errors out.  If
    the LWP is no longer in ptrace-stopped state (meaning it's zombie,
    or about to become), discard the error, clear any pending status
diff --git a/gdbserver/linux-low.h b/gdbserver/linux-low.h
index 16d9b389275..0ccc8644c07 100644
--- a/gdbserver/linux-low.h
+++ b/gdbserver/linux-low.h
@@ -131,9 +131,6 @@  struct lwp_info;
 
 struct linux_target_ops
 {
-  /* Hook to call prior to resuming a thread.  */
-  void (*prepare_to_resume) (struct lwp_info *);
-
   /* Hook to support target specific qSupported.  */
   void (*process_qsupported) (char **, int count);
 
@@ -722,6 +719,9 @@  class linux_process_target : public process_stratum_target
   /* Hook to call, if any, when a new fork is attached.  */
   virtual void low_new_fork (process_info *parent, process_info *child);
 
+  /* Hook to call prior to resuming a thread.  */
+  virtual void low_prepare_to_resume (lwp_info *lwp);
+
   /* How many bytes the PC should be decremented after a break.  */
   int m_decr_pc_after_break;
 };
diff --git a/gdbserver/linux-m32r-low.cc b/gdbserver/linux-m32r-low.cc
index bb1a2a0cd17..b82d5ab5132 100644
--- a/gdbserver/linux-m32r-low.cc
+++ b/gdbserver/linux-m32r-low.cc
@@ -163,7 +163,6 @@  m32r_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* prepare_to_resume */
   NULL, /* process_qsupported */
   NULL, /* supports_tracepoints */
   NULL, /* get_thread_area */
diff --git a/gdbserver/linux-m68k-low.cc b/gdbserver/linux-m68k-low.cc
index bfc682bacbe..051dd4554ed 100644
--- a/gdbserver/linux-m68k-low.cc
+++ b/gdbserver/linux-m68k-low.cc
@@ -259,7 +259,6 @@  m68k_supports_hardware_single_step (void)
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* prepare_to_resume */
   NULL, /* process_qsupported */
   NULL, /* supports_tracepoints */
   NULL, /* get_thread_area */
diff --git a/gdbserver/linux-mips-low.cc b/gdbserver/linux-mips-low.cc
index 3ec56d404e5..073e924619c 100644
--- a/gdbserver/linux-mips-low.cc
+++ b/gdbserver/linux-mips-low.cc
@@ -82,6 +82,8 @@  protected:
   void low_delete_thread (arch_lwp_info *) override;
 
   void low_new_fork (process_info *parent, process_info *child) override;
+
+  void low_prepare_to_resume (lwp_info *lwp) override;
 };
 
 /* The singleton target ops object.  */
@@ -493,12 +495,12 @@  mips_target::low_new_fork (process_info *parent,
 
   child_private->watch_mirror = parent_private->watch_mirror;
 }
-/* This is the implementation of linux_target_ops method
-   prepare_to_resume.  If the watch regs have changed, update the
+/* This is the implementation of linux target ops method
+   low_prepare_to_resume.  If the watch regs have changed, update the
    thread's copies.  */
 
-static void
-mips_linux_prepare_to_resume (struct lwp_info *lwp)
+void
+mips_target::low_prepare_to_resume (lwp_info *lwp)
 {
   ptid_t ptid = ptid_of (get_lwp_thread (lwp));
   struct process_info *proc = find_process_pid (ptid.pid ());
@@ -998,7 +1000,6 @@  mips_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  mips_linux_prepare_to_resume
 };
 
 /* The linux target ops object.  */
diff --git a/gdbserver/linux-ppc-low.cc b/gdbserver/linux-ppc-low.cc
index 9035b82be9d..0561ab366f6 100644
--- a/gdbserver/linux-ppc-low.cc
+++ b/gdbserver/linux-ppc-low.cc
@@ -3430,7 +3430,6 @@  ppc_get_ipa_tdesc_idx (void)
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* prepare_to_resume */
   NULL, /* process_qsupported */
   ppc_supports_tracepoints,
   ppc_get_thread_area,
diff --git a/gdbserver/linux-s390-low.cc b/gdbserver/linux-s390-low.cc
index 27bd292b20a..73b246e3134 100644
--- a/gdbserver/linux-s390-low.cc
+++ b/gdbserver/linux-s390-low.cc
@@ -2839,7 +2839,6 @@  s390_emit_ops (void)
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* prepare_to_resume */
   NULL, /* process_qsupported */
   s390_supports_tracepoints,
   s390_get_thread_area,
diff --git a/gdbserver/linux-sh-low.cc b/gdbserver/linux-sh-low.cc
index 3a111658b81..03549d1bf78 100644
--- a/gdbserver/linux-sh-low.cc
+++ b/gdbserver/linux-sh-low.cc
@@ -194,7 +194,6 @@  sh_target::low_arch_setup ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* prepare_to_resume */
   NULL, /* process_qsupported */
   NULL, /* supports_tracepoints */
   NULL, /* get_thread_area */
diff --git a/gdbserver/linux-tic6x-low.cc b/gdbserver/linux-tic6x-low.cc
index 00821e0d85f..62ff0da55b8 100644
--- a/gdbserver/linux-tic6x-low.cc
+++ b/gdbserver/linux-tic6x-low.cc
@@ -425,7 +425,6 @@  tic6x_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* prepare_to_resume */
   NULL, /* process_qsupported */
   NULL, /* supports_tracepoints */
   NULL, /* get_thread_area */
diff --git a/gdbserver/linux-tile-low.cc b/gdbserver/linux-tile-low.cc
index 0b2aafcf5c4..99423fda832 100644
--- a/gdbserver/linux-tile-low.cc
+++ b/gdbserver/linux-tile-low.cc
@@ -226,7 +226,6 @@  tile_supports_hardware_single_step (void)
 
 struct linux_target_ops the_low_target =
 {
-  NULL, /* prepare_to_resume */
   NULL, /* process_qsupported */
   NULL, /* supports_tracepoints */
   NULL, /* get_thread_area */
diff --git a/gdbserver/linux-x86-low.cc b/gdbserver/linux-x86-low.cc
index b55fb44fb10..b5eff688609 100644
--- a/gdbserver/linux-x86-low.cc
+++ b/gdbserver/linux-x86-low.cc
@@ -155,6 +155,8 @@  protected:
   void low_delete_thread (arch_lwp_info *) override;
 
   void low_new_fork (process_info *parent, process_info *child) override;
+
+  void low_prepare_to_resume (lwp_info *lwp) override;
 };
 
 /* The singleton target ops object.  */
@@ -756,6 +758,13 @@  x86_target::low_new_fork (process_info *parent, process_info *child)
   *child->priv->arch_private = *parent->priv->arch_private;
 }
 
+void
+x86_target::low_prepare_to_resume (lwp_info *lwp)
+{
+  /* This comes from nat/.  */
+  x86_linux_prepare_to_resume (lwp);
+}
+
 /* See nat/x86-dregs.h.  */
 
 struct x86_debug_reg_state *
@@ -2947,7 +2956,6 @@  x86_get_ipa_tdesc_idx (void)
 
 struct linux_target_ops the_low_target =
 {
-  x86_linux_prepare_to_resume,
   x86_linux_process_qsupported,
   x86_supports_tracepoints,
   x86_get_thread_area,
diff --git a/gdbserver/linux-xtensa-low.cc b/gdbserver/linux-xtensa-low.cc
index c17c53c9bf9..1c4db4cfaca 100644
--- a/gdbserver/linux-xtensa-low.cc
+++ b/gdbserver/linux-xtensa-low.cc
@@ -331,7 +331,6 @@  xtensa_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* prepare_to_resume */
   NULL, /* process_qsupported */
   NULL, /* supports_tracepoints */
   NULL, /* get_thread_area */