gdbserver/linux-low: turn '{collect, supply}_ptrace_register' into methods

gdbserver/ChangeLog:
2020-04-02  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>

	Turn the 'collect_ptrace_register' and 'supply_ptrace_register'
	linux target ops into methods of linux_process_target.

	* linux-low.h (struct linux_target_ops): Remove the ops.
	(class linux_process_target) <low_collect_ptrace_register>
	<low_store_ptrace_register>: Declare.
	* linux-low.cc (linux_process_target::low_collect_ptrace_register)
	(linux_process_target::low_supply_ptrace_register): Define.

	Update the callers below.

	(linux_process_target::fetch_register)
	(linux_process_target::store_register)

	* linux-x86-low.cc (the_low_target): Remove the op fields.
	* linux-aarch64-low.cc (the_low_target): Ditto.
	* linux-arm-low.cc (the_low_target): Ditto.
	* linux-bfin-low.cc (the_low_target): Ditto.
	* linux-crisv32-low.cc (the_low_target): Ditto.
	* linux-m32r-low.cc (the_low_target): Ditto.
	* linux-m68k-low.cc (the_low_target): Ditto.
	* linux-sh-low.cc (the_low_target): Ditto.
	* linux-sparc-low.cc (the_low_target): Ditto.
	* linux-tic6x-low.cc (the_low_target): Ditto.
	* linux-tile-low.cc (the_low_target): Ditto.
	* linux-xtensa-low.cc (the_low_target): Ditto.
	* linux-mips-low.cc (class mips_target)
	<low_collect_ptrace_register>
	<low_supply_ptrace_register>: Declare.
	(mips_collect_ptrace_register): Turn into ...
	(mips_target::low_collect_ptrace_register): ...this.
	(mips_supply_ptrace_register): Turn into...
	(mips_target::low_supply_ptrace_register): ...this.
	(the_low_target): Remove the op fields.
	* linux-ppc-low.cc (class ppc_target)
	<low_collect_ptrace_register>
	<low_supply_ptrace_register>: Declare.
	(ppc_collect_ptrace_register): Turn into ...
	(ppc_target::low_collect_ptrace_register): ...this.
	(ppc_supply_ptrace_register): Turn into ...
	(ppc_target::low_supply_ptrace_register): ...this.
	(ppc_fill_gregset): Update for the calls to
	low_collect_ptrace_register.
	(the_low_target): Remove the op fields.
	* linux-s390-low.cc (class s390_target)
	<low_collect_ptrace_register>
	<low_supply_ptrace_register>: Declare.
	(s390_collect_ptrace_register): Turn into ...
	(s390_target::low_collect_ptrace_register): ...this.
	(s390_supply_ptrace_register): Turn into ...
	(s390_target::low_supply_ptrace_register): ...this.
	(s390_fill_gregset): Update for the calls to
	low_collect_ptrace_register.
	(the_low_target): Remove the op fields.

gdbserver/ChangeLog

@@ -1,3 +1,60 @@
+2020-04-02  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>
+
+	Turn the 'collect_ptrace_register' and 'supply_ptrace_register'
+	linux target ops into methods of linux_process_target.
+
+	* linux-low.h (struct linux_target_ops): Remove the ops.
+	(class linux_process_target) <low_collect_ptrace_register>
+	<low_store_ptrace_register>: Declare.
+	* linux-low.cc (linux_process_target::low_collect_ptrace_register)
+	(linux_process_target::low_supply_ptrace_register): Define.
+
+	Update the callers below.
+
+	(linux_process_target::fetch_register)
+	(linux_process_target::store_register)
+
+	* linux-x86-low.cc (the_low_target): Remove the op fields.
+	* linux-aarch64-low.cc (the_low_target): Ditto.
+	* linux-arm-low.cc (the_low_target): Ditto.
+	* linux-bfin-low.cc (the_low_target): Ditto.
+	* linux-crisv32-low.cc (the_low_target): Ditto.
+	* linux-m32r-low.cc (the_low_target): Ditto.
+	* linux-m68k-low.cc (the_low_target): Ditto.
+	* linux-sh-low.cc (the_low_target): Ditto.
+	* linux-sparc-low.cc (the_low_target): Ditto.
+	* linux-tic6x-low.cc (the_low_target): Ditto.
+	* linux-tile-low.cc (the_low_target): Ditto.
+	* linux-xtensa-low.cc (the_low_target): Ditto.
+	* linux-mips-low.cc (class mips_target)
+	<low_collect_ptrace_register>
+	<low_supply_ptrace_register>: Declare.
+	(mips_collect_ptrace_register): Turn into ...
+	(mips_target::low_collect_ptrace_register): ...this.
+	(mips_supply_ptrace_register): Turn into...
+	(mips_target::low_supply_ptrace_register): ...this.
+	(the_low_target): Remove the op fields.
+	* linux-ppc-low.cc (class ppc_target)
+	<low_collect_ptrace_register>
+	<low_supply_ptrace_register>: Declare.
+	(ppc_collect_ptrace_register): Turn into ...
+	(ppc_target::low_collect_ptrace_register): ...this.
+	(ppc_supply_ptrace_register): Turn into ...
+	(ppc_target::low_supply_ptrace_register): ...this.
+	(ppc_fill_gregset): Update for the calls to
+	low_collect_ptrace_register.
+	(the_low_target): Remove the op fields.
+	* linux-s390-low.cc (class s390_target)
+	<low_collect_ptrace_register>
+	<low_supply_ptrace_register>: Declare.
+	(s390_collect_ptrace_register): Turn into ...
+	(s390_target::low_collect_ptrace_register): ...this.
+	(s390_supply_ptrace_register): Turn into ...
+	(s390_target::low_supply_ptrace_register): ...this.
+	(s390_fill_gregset): Update for the calls to
+	low_collect_ptrace_register.
+	(the_low_target): Remove the op fields.
+
 2020-04-02  Tankut Baris Aktemur  <tankut.baris.aktemur@intel.com>
 
 	Turn the 'stopped_by_watchpoint' and 'stopped_data_address' linux

gdbserver/linux-aarch64-low.cc

@@ -3113,8 +3113,6 @@ aarch64_supports_hardware_single_step (void)
 
 struct linux_target_ops the_low_target =
 {
-  NULL, /* collect_ptrace_register */
-  NULL, /* supply_ptrace_register */
   aarch64_linux_siginfo_fixup,
   aarch64_linux_new_process,
   aarch64_linux_delete_process,

gdbserver/linux-arm-low.cc

@@ -1105,8 +1105,6 @@ arm_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* collect_ptrace_register */
-  NULL, /* supply_ptrace_register */
   NULL, /* siginfo_fixup */
   arm_new_process,
   arm_delete_process,

gdbserver/linux-bfin-low.cc

@@ -171,8 +171,6 @@ bfin_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* collect_ptrace_register */
-  NULL, /* supply_ptrace_register */
   NULL, /* siginfo_fixup */
   NULL, /* new_process */
   NULL, /* delete_process */

gdbserver/linux-crisv32-low.cc

@@ -468,8 +468,6 @@ crisv32_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* collect_ptrace_register */
-  NULL, /* supply_ptrace_register */
   NULL, /* siginfo_fixup */
   NULL, /* new_process */
   NULL, /* delete_process */

gdbserver/linux-low.cc

@@ -5408,10 +5408,7 @@ linux_process_target::fetch_register (const usrregs_info *usrregs,
 	}
     }
 
-  if (the_low_target.supply_ptrace_register)
+  low_supply_ptrace_register (regcache, regno, buf);
-    the_low_target.supply_ptrace_register (regcache, regno, buf);
-  else
-    supply_register (regcache, regno, buf);
 }
 
 void
@@ -5438,10 +5435,7 @@ linux_process_target::store_register (const usrregs_info *usrregs,
   buf = (char *) alloca (size);
   memset (buf, 0, size);
 
-  if (the_low_target.collect_ptrace_register)
+  low_collect_ptrace_register (regcache, regno, buf);
-    the_low_target.collect_ptrace_register (regcache, regno, buf);
-  else
-    collect_register (regcache, regno, buf);
 
   pid = lwpid_of (current_thread);
   for (i = 0; i < size; i += sizeof (PTRACE_XFER_TYPE))
@@ -5470,6 +5464,20 @@ linux_process_target::store_register (const usrregs_info *usrregs,
 }
 #endif /* HAVE_LINUX_USRREGS */
 
+void
+linux_process_target::low_collect_ptrace_register (regcache *regcache,
+						   int regno, char *buf)
+{
+  collect_register (regcache, regno, buf);
+}
+
+void
+linux_process_target::low_supply_ptrace_register (regcache *regcache,
+						  int regno, const char *buf)
+{
+  supply_register (regcache, regno, buf);
+}
+
 void
 linux_process_target::usr_fetch_inferior_registers (const regs_info *regs_info,
 						    regcache *regcache,

gdbserver/linux-low.h

@@ -131,13 +131,6 @@ struct lwp_info;
 
 struct linux_target_ops
 {
-  /* Hooks to reformat register data for PEEKUSR/POKEUSR (in particular
-     for registers smaller than an xfer unit).  */
-  void (*collect_ptrace_register) (struct regcache *regcache,
-				   int regno, char *buf);
-  void (*supply_ptrace_register) (struct regcache *regcache,
-				  int regno, const char *buf);
-
   /* Hook to convert from target format to ptrace format and back.
      Returns true if any conversion was done; false otherwise.
      If DIRECTION is 1, then copy from INF to NATIVE.
@@ -682,6 +675,14 @@ protected:
 
   virtual CORE_ADDR low_stopped_data_address ();
 
+  /* Hooks to reformat register data for PEEKUSR/POKEUSR (in particular
+     for registers smaller than an xfer unit).  */
+  virtual void low_collect_ptrace_register (regcache *regcache, int regno,
+					    char *buf);
+
+  virtual void low_supply_ptrace_register (regcache *regcache, int regno,
+					   const char *buf);
+
   /* How many bytes the PC should be decremented after a break.  */
   virtual int low_decr_pc_after_break ();
 };

gdbserver/linux-m32r-low.cc

@@ -161,8 +161,6 @@ m32r_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* collect_ptrace_register */
-  NULL, /* supply_ptrace_register */
   NULL, /* siginfo_fixup */
   NULL, /* new_process */
   NULL, /* delete_process */

gdbserver/linux-m68k-low.cc

@@ -265,8 +265,6 @@ m68k_supports_hardware_single_step (void)
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* collect_ptrace_register */
-  NULL, /* supply_ptrace_register */
   NULL, /* siginfo_fixup */
   NULL, /* new_process */
   NULL, /* delete_process */

gdbserver/linux-mips-low.cc

@@ -64,6 +64,12 @@ protected:
   bool low_stopped_by_watchpoint () override;
 
   CORE_ADDR low_stopped_data_address () override;
+
+  void low_collect_ptrace_register (regcache *regcache, int regno,
+				    char *buf) override;
+
+  void low_supply_ptrace_register (regcache *regcache, int regno,
+				   const char *buf) override;
 };
 
 /* The singleton target ops object.  */
@@ -891,9 +897,9 @@ mips_store_fpregset (struct regcache *regcache, const void *buf)
 
 /* Take care of 32-bit registers with 64-bit ptrace, POKEUSER side.  */
 
-static void
+void
-mips_collect_ptrace_register (struct regcache *regcache,
+mips_target::low_collect_ptrace_register (regcache *regcache, int regno,
-			      int regno, char *buf)
+					  char *buf)
 {
   int use_64bit = sizeof (PTRACE_XFER_TYPE) == 8;
 
@@ -910,9 +916,9 @@ mips_collect_ptrace_register (struct regcache *regcache,
 
 /* Take care of 32-bit registers with 64-bit ptrace, PEEKUSER side.  */
 
-static void
+void
-mips_supply_ptrace_register (struct regcache *regcache,
+mips_target::low_supply_ptrace_register (regcache *regcache, int regno,
-			     int regno, const char *buf)
+					 const char *buf)
 {
   int use_64bit = sizeof (PTRACE_XFER_TYPE) == 8;
 
@@ -980,8 +986,6 @@ mips_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  mips_collect_ptrace_register,
-  mips_supply_ptrace_register,
   NULL, /* siginfo_fixup */
   mips_linux_new_process,
   mips_linux_delete_process,

gdbserver/linux-ppc-low.cc

@@ -56,6 +56,12 @@ public:
 
   bool supports_z_point_type (char z_type) override;
 
+
+  void low_collect_ptrace_register (regcache *regcache, int regno,
+				    char *buf) override;
+
+  void low_supply_ptrace_register (regcache *regcache, int regno,
+				   const char *buf) override;
 protected:
 
   void low_arch_setup () override;
@@ -208,8 +214,9 @@ ppc_target::low_cannot_fetch_register (int regno)
   return false;
 }
 
-static void
+void
-ppc_collect_ptrace_register (struct regcache *regcache, int regno, char *buf)
+ppc_target::low_collect_ptrace_register (regcache *regcache, int regno,
+					 char *buf)
 {
   memset (buf, 0, sizeof (long));
 
@@ -234,9 +241,9 @@ ppc_collect_ptrace_register (struct regcache *regcache, int regno, char *buf)
     perror_with_name ("Unexpected byte order");
 }
 
-static void
+void
-ppc_supply_ptrace_register (struct regcache *regcache,
+ppc_target::low_supply_ptrace_register (regcache *regcache, int regno,
-			    int regno, const char *buf)
+					const char *buf)
 {
   if (__BYTE_ORDER == __LITTLE_ENDIAN)
     {
@@ -401,14 +408,19 @@ static void ppc_fill_gregset (struct regcache *regcache, void *buf)
 {
   int i;
 
+  ppc_target *my_ppc_target = (ppc_target *) the_linux_target;
+
   for (i = 0; i < 32; i++)
-    ppc_collect_ptrace_register (regcache, i, (char *) buf + ppc_regmap[i]);
+    my_ppc_target->low_collect_ptrace_register (regcache, i,
+						(char *) buf + ppc_regmap[i]);
 
   for (i = 64; i < 70; i++)
-    ppc_collect_ptrace_register (regcache, i, (char *) buf + ppc_regmap[i]);
+    my_ppc_target->low_collect_ptrace_register (regcache, i,
+						(char *) buf + ppc_regmap[i]);
 
   for (i = 71; i < 73; i++)
-    ppc_collect_ptrace_register (regcache, i, (char *) buf + ppc_regmap[i]);
+    my_ppc_target->low_collect_ptrace_register (regcache, i,
+						(char *) buf + ppc_regmap[i]);
 }
 
 /* Program Priority Register regset fill function.  */
@@ -3416,8 +3428,6 @@ ppc_get_ipa_tdesc_idx (void)
 }
 
 struct linux_target_ops the_low_target = {
-  ppc_collect_ptrace_register,
-  ppc_supply_ptrace_register,
   NULL, /* siginfo_fixup */
   NULL, /* new_process */
   NULL, /* delete_process */

gdbserver/linux-s390-low.cc

@@ -63,6 +63,12 @@ public:
 
   bool supports_z_point_type (char z_type) override;
 
+  void low_collect_ptrace_register (regcache *regcache, int regno,
+				    char *buf) override;
+
+  void low_supply_ptrace_register (regcache *regcache, int regno,
+				   const char *buf) override;
+
 protected:
 
   void low_arch_setup () override;
@@ -187,11 +193,12 @@ s390_target::low_cannot_store_register (int regno)
   return false;
 }
 
-static void
+void
-s390_collect_ptrace_register (struct regcache *regcache, int regno, char *buf)
+s390_target::low_collect_ptrace_register (regcache *regcache, int regno,
+					  char *buf)
 {
   int size = register_size (regcache->tdesc, regno);
-  const struct regs_info *regs_info = the_linux_target->get_regs_info ();
+  const struct regs_info *regs_info = get_regs_info ();
   struct usrregs_info *usr = regs_info->usrregs;
   int regaddr = usr->regmap[regno];
 
@@ -233,12 +240,12 @@ s390_collect_ptrace_register (struct regcache *regcache, int regno, char *buf)
     collect_register (regcache, regno, buf);
 }
 
-static void
+void
-s390_supply_ptrace_register (struct regcache *regcache,
+s390_target::low_supply_ptrace_register (regcache *regcache, int regno,
-			     int regno, const char *buf)
+					 const char *buf)
 {
   int size = register_size (regcache->tdesc, regno);
-  const struct regs_info *regs_info = the_linux_target->get_regs_info ();
+  const struct regs_info *regs_info = get_regs_info ();
   struct usrregs_info *usr = regs_info->usrregs;
   int regaddr = usr->regmap[regno];
 
@@ -305,8 +312,8 @@ s390_fill_gregset (struct regcache *regcache, void *buf)
 	  || usr->regmap[i] > PT_ACR15)
 	continue;
 
-      s390_collect_ptrace_register (regcache, i,
+      ((s390_target *) the_linux_target)->low_collect_ptrace_register
-				    (char *) buf + usr->regmap[i]);
+	(regcache, i, (char *) buf + usr->regmap[i]);
     }
 }
 
@@ -2838,8 +2845,6 @@ s390_emit_ops (void)
 }
 
 struct linux_target_ops the_low_target = {
-  s390_collect_ptrace_register,
-  s390_supply_ptrace_register,
   NULL, /* siginfo_fixup */
   NULL, /* new_process */
   NULL, /* delete_process */

gdbserver/linux-sh-low.cc

@@ -192,8 +192,6 @@ sh_target::low_arch_setup ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* collect_ptrace_register */
-  NULL, /* supply_ptrace_register */
   NULL, /* siginfo_fixup */
   NULL, /* new_process */
   NULL, /* delete_process */

gdbserver/linux-sparc-low.cc

@@ -341,7 +341,6 @@ sparc_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, NULL
 };
 
 /* The linux target ops object.  */

gdbserver/linux-tic6x-low.cc

@@ -423,8 +423,6 @@ tic6x_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* collect_ptrace_register */
-  NULL, /* supply_ptrace_register */
   NULL, /* siginfo_fixup */
   NULL, /* new_process */
   NULL, /* delete_process */

gdbserver/linux-tile-low.cc

@@ -224,8 +224,6 @@ tile_supports_hardware_single_step (void)
 
 struct linux_target_ops the_low_target =
 {
-  NULL, /* collect_ptrace_register */
-  NULL, /* supply_ptrace_register */
   NULL, /* siginfo_fixup */
   NULL, /* new_process */
   NULL, /* delete_process */

gdbserver/linux-x86-low.cc

@@ -137,6 +137,10 @@ protected:
   bool low_stopped_by_watchpoint () override;
 
   CORE_ADDR low_stopped_data_address () override;
+
+  /* collect_ptrace_register/supply_ptrace_register are not needed in the
+     native i386 case (no registers smaller than an xfer unit), and are not
+     used in the biarch case (HAVE_LINUX_USRREGS is not defined).  */
 };
 
 /* The singleton target ops object.  */
@@ -2922,11 +2926,6 @@ x86_get_ipa_tdesc_idx (void)
 
 struct linux_target_ops the_low_target =
 {
-  /* collect_ptrace_register/supply_ptrace_register are not needed in the
-     native i386 case (no registers smaller than an xfer unit), and are not
-     used in the biarch case (HAVE_LINUX_USRREGS is not defined).  */
-  NULL,
-  NULL,
   /* need to fix up i386 siginfo if host is amd64 */
   x86_siginfo_fixup,
   x86_linux_new_process,

gdbserver/linux-xtensa-low.cc

@@ -329,8 +329,6 @@ xtensa_target::get_regs_info ()
 }
 
 struct linux_target_ops the_low_target = {
-  NULL, /* collect_ptrace_register */
-  NULL, /* supply_ptrace_register */
   NULL, /* siginfo_fixup */
   NULL, /* new_process */
   NULL, /* delete_process */