Replace some $ARCH_{get,set}_pc with linux_{get,set}_pc_32bit

This patch adds a pair of new functions linux_get_pc_32bit and
linux_set_pc_32bit which get and set 32-bit register "pc" from
regcache.  This function can be used some targets and these own
$ARCH_{get,set}_pc are replaced by linux_{get,set}_pc_32bit
respectively.

This patch touches many targets, but I only have arm board to
test and no regression.  I also rebuilt nios2-linux GDBserver.
If it is right to go, I'll post the 64-bit counterpart later.

gdb/gdbserver:

2016-01-18  Yao Qi  <yao.qi@linaro.org>

	* linux-arm-low.c (debug_threads): Remove declaration.
	(arm_get_pc, arm_set_pc): Remove.
	(the_low_target): Use linux_get_pc_32bit and
	linux_set_pc_32bit.
	* linux-bfin-low.c (bfin_get_pc, bfin_set_pc): Remove.
	(the_low_target): Use linux_get_pc_32bit and
	linux_set_pc_32bit.
	* linux-cris-low.c (debug_threads): Remove declaration.
	(cris_get_pc, cris_set_pc,): Remove.
	(the_low_target): Use linux_get_pc_32bit and
	linux_set_pc_32bit.
	* linux-crisv32-low.c (debug_threads): Remove declaration.
	(cris_get_pc, cris_set_pc): Remove.
	(the_low_target): Use linux_get_pc_32bit and
	linux_set_pc_32bit.
	* linux-low.c: Include inttypes.h.
	(linux_get_pc_32bit, linux_set_pc_32bit): New functions.
	* linux-low.h (linux_get_pc_32bit, linux_set_pc_32bit): Declare.
	* linux-m32r-low.c (m32r_get_pc, m32r_set_pc): Remove.
	(the_low_target): Use linux_get_pc_32bit and
	linux_set_pc_32bit.
	* linux-m68k-low.c (m68k_get_pc, m68k_set_pc): Remove.
	(the_low_target): Use linux_get_pc_32bit and
	linux_set_pc_32bit.
	* linux-nios2-low.c (nios2_get_pc, nios2_set_pc): Remove.
	(the_low_target): Use linux_get_pc_32bit and
	linux_set_pc_32bit.
	* linux-sh-low.c (sh_get_pc, sh_set_pc): Remove.
	(the_low_target): Use linux_get_pc_32bit and
	linux_set_pc_32bit.
	* linux-xtensa-low.c (xtensa_get_pc, xtensa_set_pc): Remove.
	(the_low_target): Use linux_get_pc_32bit and
	linux_set_pc_32bit.

12 files changed, 83 insertions, 180 deletions

diff --git a/gdb/gdbserver/ChangeLog b/gdb/gdbserver/ChangeLog
index 2311d03..9dc7c2f 100644
--- a/gdb/gdbserver/ChangeLog
+++ b/gdb/gdbserver/ChangeLog
@@ -1,3 +1,39 @@
+2016-01-18  Yao Qi  <yao.qi@linaro.org>
+
+	* linux-arm-low.c (debug_threads): Remove declaration.
+	(arm_get_pc, arm_set_pc): Remove.
+	(the_low_target): Use linux_get_pc_32bit and
+	linux_set_pc_32bit.
+	* linux-bfin-low.c (bfin_get_pc, bfin_set_pc): Remove.
+	(the_low_target): Use linux_get_pc_32bit and
+	linux_set_pc_32bit.
+	* linux-cris-low.c (debug_threads): Remove declaration.
+	(cris_get_pc, cris_set_pc,): Remove.
+	(the_low_target): Use linux_get_pc_32bit and
+	linux_set_pc_32bit.
+	* linux-crisv32-low.c (debug_threads): Remove declaration.
+	(cris_get_pc, cris_set_pc): Remove.
+	(the_low_target): Use linux_get_pc_32bit and
+	linux_set_pc_32bit.
+	* linux-low.c: Include inttypes.h.
+	(linux_get_pc_32bit, linux_set_pc_32bit): New functions.
+	* linux-low.h (linux_get_pc_32bit, linux_set_pc_32bit): Declare.
+	* linux-m32r-low.c (m32r_get_pc, m32r_set_pc): Remove.
+	(the_low_target): Use linux_get_pc_32bit and
+	linux_set_pc_32bit.
+	* linux-m68k-low.c (m68k_get_pc, m68k_set_pc): Remove.
+	(the_low_target): Use linux_get_pc_32bit and
+	linux_set_pc_32bit.
+	* linux-nios2-low.c (nios2_get_pc, nios2_set_pc): Remove.
+	(the_low_target): Use linux_get_pc_32bit and
+	linux_set_pc_32bit.
+	* linux-sh-low.c (sh_get_pc, sh_set_pc): Remove.
+	(the_low_target): Use linux_get_pc_32bit and
+	linux_set_pc_32bit.
+	* linux-xtensa-low.c (xtensa_get_pc, xtensa_set_pc): Remove.
+	(the_low_target): Use linux_get_pc_32bit and
+	linux_set_pc_32bit.
+
 2016-01-18  Gary Benson  <gbenson@redhat.com>
 
 	* configure.ac (AC_FUNC_FORK): New check.
diff --git a/gdb/gdbserver/linux-arm-low.c b/gdb/gdbserver/linux-arm-low.c
index 927a6fa..57cb855 100644
--- a/gdb/gdbserver/linux-arm-low.c
+++ b/gdb/gdbserver/linux-arm-low.c
@@ -245,25 +245,6 @@ arm_store_vfpregset (struct regcache *regcache, const void *buf)
   arm_store_vfpregset_num (regcache, buf, num);
 }
 
-extern int debug_threads;
-
-static CORE_ADDR
-arm_get_pc (struct regcache *regcache)
-{
-  unsigned long pc;
-  collect_register_by_name (regcache, "pc", &pc);
-  if (debug_threads)
-    debug_printf ("stop pc is %08lx\n", pc);
-  return pc;
-}
-
-static void
-arm_set_pc (struct regcache *regcache, CORE_ADDR pc)
-{
-  unsigned long newpc = pc;
-  supply_register_by_name (regcache, "pc", &newpc);
-}
-
 /* Wrapper of arm_is_thumb_mode for get_next_pcs.  */
 static int
 get_next_pcs_is_thumb (struct arm_get_next_pcs *self)
@@ -1011,8 +992,8 @@ struct linux_target_ops the_low_target = {
   arm_cannot_fetch_register,
   arm_cannot_store_register,
   NULL, /* fetch_register */
-  arm_get_pc,
-  arm_set_pc,
+  linux_get_pc_32bit,
+  linux_set_pc_32bit,
   arm_breakpoint_kind_from_pc,
   arm_sw_breakpoint_from_kind,
   arm_gdbserver_get_next_pcs,
diff --git a/gdb/gdbserver/linux-bfin-low.c b/gdb/gdbserver/linux-bfin-low.c
index 5fdb7d4..8d08f7a 100644
--- a/gdb/gdbserver/linux-bfin-low.c
+++ b/gdb/gdbserver/linux-bfin-low.c
@@ -54,24 +54,6 @@ bfin_cannot_fetch_register (int regno)
   return (regno >= bfin_num_regs);
 }
 
-static CORE_ADDR
-bfin_get_pc (struct regcache *regcache)
-{
-  unsigned long pc;
-
-  collect_register_by_name (regcache, "pc", &pc);
-
-  return pc;
-}
-
-static void
-bfin_set_pc (struct regcache *regcache, CORE_ADDR pc)
-{
-  unsigned long newpc = pc;
-
-  supply_register_by_name (regcache, "pc", &newpc);
-}
-
 #define bfin_breakpoint_len 2
 static const gdb_byte bfin_breakpoint[bfin_breakpoint_len] = {0xa1, 0x00};
 
@@ -137,8 +119,8 @@ struct linux_target_ops the_low_target = {
   bfin_cannot_fetch_register,
   bfin_cannot_store_register,
   NULL, /* fetch_register */
-  bfin_get_pc,
-  bfin_set_pc,
+  linux_get_pc_32bit,
+  linux_set_pc_32bit,
   NULL, /* breakpoint_kind_from_pc */
   bfin_sw_breakpoint_from_kind,
   NULL, /* get_next_pcs */
diff --git a/gdb/gdbserver/linux-cris-low.c b/gdb/gdbserver/linux-cris-low.c
index ca0f0ff..45d4299 100644
--- a/gdb/gdbserver/linux-cris-low.c
+++ b/gdb/gdbserver/linux-cris-low.c
@@ -59,25 +59,6 @@ cris_cannot_fetch_register (int regno)
   return (regno >= cris_num_regs);
 }
 
-extern int debug_threads;
-
-static CORE_ADDR
-cris_get_pc (struct regcache *regcache)
-{
-  unsigned long pc;
-  collect_register_by_name (regcache, "pc", &pc);
-  if (debug_threads)
-    debug_printf ("stop pc is %08lx\n", pc);
-  return pc;
-}
-
-static void
-cris_set_pc (struct regcache *regcache, CORE_ADDR pc)
-{
-  unsigned long newpc = pc;
-  supply_register_by_name (regcache, "pc", &newpc);
-}
-
 static const unsigned short cris_breakpoint = 0xe938;
 #define cris_breakpoint_len 2
 
@@ -135,8 +116,8 @@ struct linux_target_ops the_low_target = {
   cris_cannot_fetch_register,
   cris_cannot_store_register,
   NULL, /* fetch_register */
-  cris_get_pc,
-  cris_set_pc,
+  linux_get_pc_32bit,
+  linux_set_pc_32bit,
   NULL, /* breakpoint_kind_from_pc */
   cris_sw_breakpoint_from_kind,
   NULL, /* get_next_pcs */
diff --git a/gdb/gdbserver/linux-crisv32-low.c b/gdb/gdbserver/linux-crisv32-low.c
index 35b2048..16c1f72 100644
--- a/gdb/gdbserver/linux-crisv32-low.c
+++ b/gdb/gdbserver/linux-crisv32-low.c
@@ -55,25 +55,6 @@ static int cris_regmap[] = {
 
 };
 
-extern int debug_threads;
-
-static CORE_ADDR
-cris_get_pc (struct regcache *regcache)
-{
-  unsigned long pc;
-  collect_register_by_name (regcache, "pc", &pc);
-  if (debug_threads)
-    debug_printf ("stop pc is %08lx\n", pc);
-  return pc;
-}
-
-static void
-cris_set_pc (struct regcache *regcache, CORE_ADDR pc)
-{
-  unsigned long newpc = pc;
-  supply_register_by_name (regcache, "pc", &newpc);
-}
-
 static const unsigned short cris_breakpoint = 0xe938;
 #define cris_breakpoint_len 2
 
@@ -418,8 +399,8 @@ struct linux_target_ops the_low_target = {
   NULL,
   NULL,
   NULL, /* fetch_register */
-  cris_get_pc,
-  cris_set_pc,
+  linux_get_pc_32bit,
+  linux_set_pc_32bit,
   NULL, /* breakpoint_kind_from_pc */
   cris_sw_breakpoint_from_kind,
   NULL, /* get_next_pcs */
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c
index 7c77a2f..8f5ab0b 100644
--- a/gdb/gdbserver/linux-low.c
+++ b/gdb/gdbserver/linux-low.c
@@ -46,6 +46,7 @@
 #include "filestuff.h"
 #include "tracepoint.h"
 #include "hostio.h"
+#include <inttypes.h>
 #ifndef ELFMAG0
 /* Don't include <linux/elf.h> here.  If it got included by gdb_proc_service.h
    then ELFMAG0 will have been defined.  If it didn't get included by
@@ -7257,6 +7258,31 @@ linux_breakpoint_kind_from_current_state (CORE_ADDR *pcptr)
     return linux_breakpoint_kind_from_pc (pcptr);
 }
 
+/* Default implementation of linux_target_ops method "set_pc" for
+   32-bit pc register which is literally named "pc".  */
+
+void
+linux_set_pc_32bit (struct regcache *regcache, CORE_ADDR pc)
+{
+  uint32_t newpc = pc;
+
+  supply_register_by_name (regcache, "pc", &newpc);
+}
+
+/* Default implementation of linux_target_ops method "get_pc" for
+   32-bit pc register which is literally named "pc".  */
+
+CORE_ADDR
+linux_get_pc_32bit (struct regcache *regcache)
+{
+  uint32_t pc;
+
+  collect_register_by_name (regcache, "pc", &pc);
+  if (debug_threads)
+    debug_printf ("stop pc is 0x%" PRIx32 "\n", pc);
+  return pc;
+}
+
 static struct target_ops linux_target_ops = {
   linux_create_inferior,
   linux_post_create_inferior,
diff --git a/gdb/gdbserver/linux-low.h b/gdb/gdbserver/linux-low.h
index 751eea1..98a331d 100644
--- a/gdb/gdbserver/linux-low.h
+++ b/gdb/gdbserver/linux-low.h
@@ -392,6 +392,9 @@ void initialize_regsets_info (struct regsets_info *regsets_info);
 
 void initialize_low_arch (void);
 
+void linux_set_pc_32bit (struct regcache *regcache, CORE_ADDR pc);
+CORE_ADDR linux_get_pc_32bit (struct regcache *regcache);
+
 /* From thread-db.c  */
 int thread_db_init (void);
 void thread_db_detach (struct process_info *);
diff --git a/gdb/gdbserver/linux-m32r-low.c b/gdb/gdbserver/linux-m32r-low.c
index f0431eb..39eb929 100644
--- a/gdb/gdbserver/linux-m32r-low.c
+++ b/gdb/gdbserver/linux-m32r-low.c
@@ -53,23 +53,6 @@ m32r_cannot_fetch_register (int regno)
   return (regno >= m32r_num_regs);
 }
 
-static CORE_ADDR
-m32r_get_pc (struct regcache *regcache)
-{
-  unsigned long pc;
-  collect_register_by_name (regcache, "pc", &pc);
-  if (debug_threads)
-    debug_printf ("stop pc is %08lx\n", pc);
-  return pc;
-}
-
-static void
-m32r_set_pc (struct regcache *regcache, CORE_ADDR pc)
-{
-  unsigned long newpc = pc;
-  supply_register_by_name (regcache, "pc", &newpc);
-}
-
 static const unsigned short m32r_breakpoint = 0x10f1;
 #define m32r_breakpoint_len 2
 
@@ -135,8 +118,8 @@ struct linux_target_ops the_low_target = {
   m32r_cannot_fetch_register,
   m32r_cannot_store_register,
   NULL, /* fetch_register */
-  m32r_get_pc,
-  m32r_set_pc,
+  linux_get_pc_32bit,
+  linux_set_pc_32bit,
   NULL, /* breakpoint_from_pc */
   m32r_sw_breakpoint_from_kind,
   NULL,
diff --git a/gdb/gdbserver/linux-m68k-low.c b/gdb/gdbserver/linux-m68k-low.c
index bee21c7..df3d7c6 100644
--- a/gdb/gdbserver/linux-m68k-low.c
+++ b/gdb/gdbserver/linux-m68k-low.c
@@ -134,23 +134,6 @@ m68k_sw_breakpoint_from_kind (int kind, int *size)
   return m68k_breakpoint;
 }
 
-static CORE_ADDR
-m68k_get_pc (struct regcache *regcache)
-{
-  unsigned long pc;
-
-  collect_register_by_name (regcache, "pc", &pc);
-  return pc;
-}
-
-static void
-m68k_set_pc (struct regcache *regcache, CORE_ADDR value)
-{
-  unsigned long newpc = value;
-
-  supply_register_by_name (regcache, "pc", &newpc);
-}
-
 static int
 m68k_breakpoint_at (CORE_ADDR pc)
 {
@@ -222,8 +205,8 @@ struct linux_target_ops the_low_target = {
   m68k_cannot_fetch_register,
   m68k_cannot_store_register,
   NULL, /* fetch_register */
-  m68k_get_pc,
-  m68k_set_pc,
+  linux_get_pc_32bit,
+  linux_set_pc_32bit,
   NULL, /* breakpoint_kind_from_pc */
   m68k_sw_breakpoint_from_kind,
   NULL,
diff --git a/gdb/gdbserver/linux-nios2-low.c b/gdb/gdbserver/linux-nios2-low.c
index ba852ac..ea0ded1 100644
--- a/gdb/gdbserver/linux-nios2-low.c
+++ b/gdb/gdbserver/linux-nios2-low.c
@@ -95,28 +95,6 @@ nios2_cannot_store_register (int regno)
   return 0;
 }
 
-/* Implement the get_pc linux_target_ops method.  */
-
-static CORE_ADDR
-nios2_get_pc (struct regcache *regcache)
-{
-  union nios2_register pc;
-
-  collect_register_by_name (regcache, "pc", pc.buf);
-  return pc.reg32;
-}
-
-/* Implement the set_pc linux_target_ops method.  */
-
-static void
-nios2_set_pc (struct regcache *regcache, CORE_ADDR pc)
-{
-  union nios2_register newpc;
-
-  newpc.reg32 = pc;
-  supply_register_by_name (regcache, "pc", newpc.buf);
-}
-
 /* Breakpoint support.  Also see comments on nios2_breakpoint_from_pc
    in nios2-tdep.c.  */
 
@@ -263,8 +241,8 @@ struct linux_target_ops the_low_target =
   nios2_cannot_fetch_register,
   nios2_cannot_store_register,
   NULL,
-  nios2_get_pc,
-  nios2_set_pc,
+  linux_get_pc_32bit,
+  linux_set_pc_32bit,
   NULL, /* breakpoint_kind_from_pc */
   nios2_sw_breakpoint_from_kind,
   NULL, /* get_next_pcs */
diff --git a/gdb/gdbserver/linux-sh-low.c b/gdb/gdbserver/linux-sh-low.c
index 56f3406..38612e2 100644
--- a/gdb/gdbserver/linux-sh-low.c
+++ b/gdb/gdbserver/linux-sh-low.c
@@ -58,21 +58,6 @@ sh_cannot_fetch_register (int regno)
   return 0;
 }
 
-static CORE_ADDR
-sh_get_pc (struct regcache *regcache)
-{
-  unsigned long pc;
-  collect_register_by_name (regcache, "pc", &pc);
-  return pc;
-}
-
-static void
-sh_set_pc (struct regcache *regcache, CORE_ADDR pc)
-{
-  unsigned long newpc = pc;
-  supply_register_by_name (regcache, "pc", &newpc);
-}
-
 /* Correct in either endianness, obviously.  */
 static const unsigned short sh_breakpoint = 0xc3c3;
 #define sh_breakpoint_len 2
@@ -163,8 +148,8 @@ struct linux_target_ops the_low_target = {
   sh_cannot_fetch_register,
   sh_cannot_store_register,
   NULL, /* fetch_register */
-  sh_get_pc,
-  sh_set_pc,
+  linux_get_pc_32bit,
+  linux_set_pc_32bit,
   NULL, /* breakpoint_kind_from_pc */
   sh_sw_breakpoint_from_kind,
   NULL,
diff --git a/gdb/gdbserver/linux-xtensa-low.c b/gdb/gdbserver/linux-xtensa-low.c
index 647dbf4..6e945ea 100644
--- a/gdb/gdbserver/linux-xtensa-low.c
+++ b/gdb/gdbserver/linux-xtensa-low.c
@@ -163,22 +163,6 @@ xtensa_sw_breakpoint_from_kind (int kind, int *size)
   return xtensa_breakpoint;
 }
 
-static CORE_ADDR
-xtensa_get_pc (struct regcache *regcache)
-{
-  unsigned long pc;
-
-  collect_register_by_name (regcache, "pc", &pc);
-  return pc;
-}
-
-static void
-xtensa_set_pc (struct regcache *regcache, CORE_ADDR pc)
-{
-  unsigned long newpc = pc;
-  supply_register_by_name (regcache, "pc", &newpc);
-}
-
 static int
 xtensa_breakpoint_at (CORE_ADDR where)
 {
@@ -249,8 +233,8 @@ struct linux_target_ops the_low_target = {
   0,
   0,
   NULL, /* fetch_register */
-  xtensa_get_pc,
-  xtensa_set_pc,
+  linux_get_pc_32bit,
+  linux_set_pc_32bit,
   NULL, /* breakpoint_kind_from_pc */
   xtensa_sw_breakpoint_from_kind,
   NULL,