Fix build for aarch64, arm, and riscv FreeBSD native targets.

Remove unused gdbarch argument to helper functions originally
copied from mips-fbsd-nat.c.  Include regcache.h previously
included from defs.h via gdbarch.h.

gdb/ChangeLog:

	* aarch64-fbsd-nat.c: Include regcache.h.
	(getregs_supplies, getfpregs_supplies): Remove unused gdbarch
	argument.
	(aarch64_fbsd_nat_target::fetch_registers)
	(aarch64_fbsd_nat_target::store_registers): Remove gdbarch
	variable.
	* arm-fbsd-nat.c, riscv-fbsd-nat.c: Likewise.

4 files changed, 30 insertions, 24 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 5e086ca..a46a1f5 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,15 @@
 2019-07-16  John Baldwin  <jhb@FreeBSD.org>
 
+	* aarch64-fbsd-nat.c: Include regcache.h.
+	(getregs_supplies, getfpregs_supplies): Remove unused gdbarch
+	argument.
+	(aarch64_fbsd_nat_target::fetch_registers)
+	(aarch64_fbsd_nat_target::store_registers): Remove gdbarch
+	variable.
+	* arm-fbsd-nat.c, riscv-fbsd-nat.c: Likewise.
+
+2019-07-16  John Baldwin  <jhb@FreeBSD.org>
+
 	* fbsd-nat.c: Include gdbarch.h.
 
 2019-07-15  Tom Tromey  <tromey@adacore.com>
diff --git a/gdb/aarch64-fbsd-nat.c b/gdb/aarch64-fbsd-nat.c
index bb187a6..3c3931f 100644
--- a/gdb/aarch64-fbsd-nat.c
+++ b/gdb/aarch64-fbsd-nat.c
@@ -18,6 +18,7 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
+#include "regcache.h"
 #include "target.h"
 
 #include <sys/types.h>
@@ -40,7 +41,7 @@ static aarch64_fbsd_nat_target the_aarch64_fbsd_nat_target;
 /* Determine if PT_GETREGS fetches REGNUM.  */
 
 static bool
-getregs_supplies (struct gdbarch *gdbarch, int regnum)
+getregs_supplies (int regnum)
 {
   return (regnum >= AARCH64_X0_REGNUM && regnum <= AARCH64_CPSR_REGNUM);
 }
@@ -48,7 +49,7 @@ getregs_supplies (struct gdbarch *gdbarch, int regnum)
 /* Determine if PT_GETFPREGS fetches REGNUM.  */
 
 static bool
-getfpregs_supplies (struct gdbarch *gdbarch, int regnum)
+getfpregs_supplies (int regnum)
 {
   return (regnum >= AARCH64_V0_REGNUM && regnum <= AARCH64_FPCR_REGNUM);
 }
@@ -62,8 +63,7 @@ aarch64_fbsd_nat_target::fetch_registers (struct regcache *regcache,
 {
   pid_t pid = get_ptrace_pid (regcache->ptid ());
 
-  struct gdbarch *gdbarch = regcache->arch ();
-  if (regnum == -1 || getregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getregs_supplies (regnum))
     {
       struct reg regs;
 
@@ -74,7 +74,7 @@ aarch64_fbsd_nat_target::fetch_registers (struct regcache *regcache,
 			       sizeof (regs));
     }
 
-  if (regnum == -1 || getfpregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getfpregs_supplies (regnum))
     {
       struct fpreg fpregs;
 
@@ -95,8 +95,7 @@ aarch64_fbsd_nat_target::store_registers (struct regcache *regcache,
 {
   pid_t pid = get_ptrace_pid (regcache->ptid ());
 
-  struct gdbarch *gdbarch = regcache->arch ();
-  if (regnum == -1 || getregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getregs_supplies (regnum))
     {
       struct reg regs;
 
@@ -110,7 +109,7 @@ aarch64_fbsd_nat_target::store_registers (struct regcache *regcache,
 	perror_with_name (_("Couldn't write registers"));
     }
 
-  if (regnum == -1 || getfpregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getfpregs_supplies (regnum))
     {
       struct fpreg fpregs;
 
diff --git a/gdb/arm-fbsd-nat.c b/gdb/arm-fbsd-nat.c
index f85ecc1..e6c7d3c 100644
--- a/gdb/arm-fbsd-nat.c
+++ b/gdb/arm-fbsd-nat.c
@@ -41,7 +41,7 @@ static arm_fbsd_nat_target the_arm_fbsd_nat_target;
 /* Determine if PT_GETREGS fetches REGNUM.  */
 
 static bool
-getregs_supplies (struct gdbarch *gdbarch, int regnum)
+getregs_supplies (int regnum)
 {
   return ((regnum >= ARM_A1_REGNUM && regnum <= ARM_PC_REGNUM)
 	  || regnum == ARM_PS_REGNUM);
@@ -51,7 +51,7 @@ getregs_supplies (struct gdbarch *gdbarch, int regnum)
 /* Determine if PT_GETVFPREGS fetches REGNUM.  */
 
 static bool
-getvfpregs_supplies (struct gdbarch *gdbarch, int regnum)
+getvfpregs_supplies (int regnum)
 {
   return ((regnum >= ARM_D0_REGNUM && regnum <= ARM_D31_REGNUM)
 	  || regnum == ARM_FPSCR_REGNUM);
@@ -66,8 +66,7 @@ arm_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
 {
   pid_t pid = get_ptrace_pid (regcache->ptid ());
 
-  struct gdbarch *gdbarch = regcache->arch ();
-  if (regnum == -1 || getregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getregs_supplies (regnum))
     {
       struct reg regs;
 
@@ -79,7 +78,7 @@ arm_fbsd_nat_target::fetch_registers (struct regcache *regcache, int regnum)
     }
 
 #ifdef PT_GETVFPREGS
-  if (regnum == -1 || getvfpregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getvfpregs_supplies (regnum))
     {
       struct vfpreg vfpregs;
 
@@ -100,8 +99,7 @@ arm_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
 {
   pid_t pid = get_ptrace_pid (regcache->ptid ());
 
-  struct gdbarch *gdbarch = regcache->arch ();
-  if (regnum == -1 || getregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getregs_supplies (regnum))
     {
       struct reg regs;
 
@@ -116,7 +114,7 @@ arm_fbsd_nat_target::store_registers (struct regcache *regcache, int regnum)
     }
 
 #ifdef PT_GETVFPREGS
-  if (regnum == -1 || getvfpregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getvfpregs_supplies (regnum))
     {
       struct vfpreg vfpregs;
 
diff --git a/gdb/riscv-fbsd-nat.c b/gdb/riscv-fbsd-nat.c
index f485084..24381e0 100644
--- a/gdb/riscv-fbsd-nat.c
+++ b/gdb/riscv-fbsd-nat.c
@@ -18,6 +18,7 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
 
 #include "defs.h"
+#include "regcache.h"
 #include "target.h"
 
 #include <sys/types.h>
@@ -40,7 +41,7 @@ static riscv_fbsd_nat_target the_riscv_fbsd_nat_target;
 /* Determine if PT_GETREGS fetches REGNUM.  */
 
 static bool
-getregs_supplies (struct gdbarch *gdbarch, int regnum)
+getregs_supplies (int regnum)
 {
   return ((regnum >= RISCV_RA_REGNUM && regnum <= RISCV_PC_REGNUM)
 	  || regnum == RISCV_CSR_SSTATUS_REGNUM);
@@ -49,7 +50,7 @@ getregs_supplies (struct gdbarch *gdbarch, int regnum)
 /* Determine if PT_GETFPREGS fetches REGNUM.  */
 
 static bool
-getfpregs_supplies (struct gdbarch *gdbarch, int regnum)
+getfpregs_supplies (int regnum)
 {
   return ((regnum >= RISCV_FIRST_FP_REGNUM && regnum <= RISCV_LAST_FP_REGNUM)
 	  || regnum == RISCV_CSR_FCSR_REGNUM);
@@ -64,10 +65,9 @@ riscv_fbsd_nat_target::fetch_registers (struct regcache *regcache,
 {
   pid_t pid = get_ptrace_pid (regcache->ptid ());
 
-  struct gdbarch *gdbarch = regcache->arch ();
   if (regnum == -1 || regnum == RISCV_ZERO_REGNUM)
     regcache->raw_supply_zeroed (RISCV_ZERO_REGNUM);
-  if (regnum == -1 || getregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getregs_supplies (regnum))
     {
       struct reg regs;
 
@@ -78,7 +78,7 @@ riscv_fbsd_nat_target::fetch_registers (struct regcache *regcache,
 			       sizeof (regs));
     }
 
-  if (regnum == -1 || getfpregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getfpregs_supplies (regnum))
     {
       struct fpreg fpregs;
 
@@ -99,8 +99,7 @@ riscv_fbsd_nat_target::store_registers (struct regcache *regcache,
 {
   pid_t pid = get_ptrace_pid (regcache->ptid ());
 
-  struct gdbarch *gdbarch = regcache->arch ();
-  if (regnum == -1 || getregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getregs_supplies (regnum))
     {
       struct reg regs;
 
@@ -114,7 +113,7 @@ riscv_fbsd_nat_target::store_registers (struct regcache *regcache,
 	perror_with_name (_("Couldn't write registers"));
     }
 
-  if (regnum == -1 || getfpregs_supplies (gdbarch, regnum))
+  if (regnum == -1 || getfpregs_supplies (regnum))
     {
       struct fpreg fpregs;