sim/rx: fill in missing 'void' for empty argument lists

Ensure we have 'void' inside empty argument lists.  This was causing
several warnings for the rx simulator.

sim/rx/ChangeLog:

	* cpu.h (trace_register_changes): Add void parameter type.
	* err.c (ee_overrides): Likewise.
	* mem.c (mem_usage_stats): Likewise.
	(e): Likewise.
	* reg.c (stack_heap_stats): Likewise.
	* rx.c (pop): Likewise.
	(poppc): Likewise.
	(decode_opcode): Likewise.
	* syscalls.c (arg): Likewise.

7 files changed, 21 insertions, 9 deletions

diff --git a/sim/rx/ChangeLog b/sim/rx/ChangeLog
index 8d5f1d7..58b07ea 100644
--- a/sim/rx/ChangeLog
+++ b/sim/rx/ChangeLog
@@ -1,5 +1,17 @@
 2021-02-08  Andrew Burgess  <andrew.burgess@embecosm.com>
 
+	* cpu.h (trace_register_changes): Add void parameter type.
+	* err.c (ee_overrides): Likewise.
+	* mem.c (mem_usage_stats): Likewise.
+	(e): Likewise.
+	* reg.c (stack_heap_stats): Likewise.
+	* rx.c (pop): Likewise.
+	(poppc): Likewise.
+	(decode_opcode): Likewise.
+	* syscalls.c (arg): Likewise.
+
+2021-02-08  Andrew Burgess  <andrew.burgess@embecosm.com>
+
 	* gdb-if.c (sim_do_command): Work with a copy of the command.
 
 2021-02-08  Andrew Burgess  <andrew.burgess@embecosm.com>
diff --git a/sim/rx/cpu.h b/sim/rx/cpu.h
index 700f2de..ef4503c 100644
--- a/sim/rx/cpu.h
+++ b/sim/rx/cpu.h
@@ -240,6 +240,6 @@ extern void reset_pipeline_stats (void);
 extern void halt_pipeline_stats (void);
 extern void pipeline_stats (void);
 
-extern void trace_register_changes ();
+extern void trace_register_changes (void);
 extern void generate_access_exception (void);
 extern jmp_buf decode_jmp_buf;
diff --git a/sim/rx/err.c b/sim/rx/err.c
index 3fc64d1..ce1cd57 100644
--- a/sim/rx/err.c
+++ b/sim/rx/err.c
@@ -28,7 +28,7 @@ static unsigned char ee_actions[SIM_ERR_NUM_ERRORS];
 static enum execution_error last_error;
 
 static void
-ee_overrides ()
+ee_overrides (void)
 {
   /* GCC may initialize a bitfield by reading the uninitialized byte,
      masking in the bitfield, and writing the byte back out.  */
diff --git a/sim/rx/mem.c b/sim/rx/mem.c
index 40ab0bd..7fbf08e 100644
--- a/sim/rx/mem.c
+++ b/sim/rx/mem.c
@@ -161,7 +161,7 @@ mcs (int isput, int bytes)
 }
 
 void
-mem_usage_stats ()
+mem_usage_stats (void)
 {
   int i, j;
   int rstart = 0;
@@ -244,7 +244,7 @@ s (int address, char *dir)
 
 #define S(d) if (trace) s(address, d)
 static void
-e ()
+e (void)
 {
   if (!trace)
     return;
diff --git a/sim/rx/reg.c b/sim/rx/reg.c
index c300f3b..00796a0 100644
--- a/sim/rx/reg.c
+++ b/sim/rx/reg.c
@@ -149,7 +149,7 @@ get_reg64 (int id)
 static int highest_sp = 0, lowest_sp = 0xffffff;
 
 void
-stack_heap_stats ()
+stack_heap_stats (void)
 {
   if (heapbottom < heaptop)
     printf ("heap:  %08x - %08x (%d bytes)\n", heapbottom, heaptop,
diff --git a/sim/rx/rx.c b/sim/rx/rx.c
index beed6a1..e3737a5 100644
--- a/sim/rx/rx.c
+++ b/sim/rx/rx.c
@@ -682,7 +682,7 @@ pushpc(int val)
 }
 
 static int
-pop()
+pop (void)
 {
   int rv;
   int rsp = get_reg (sp);
@@ -693,7 +693,7 @@ pop()
 }
 
 static int
-poppc()
+poppc (void)
 {
   int rv;
   int rsp = get_reg (sp);
@@ -931,7 +931,7 @@ op_is_memory (const RX_Opcode_Decoded *rd, int i)
 #define DO_RETURN(x) { longjmp (decode_jmp_buf, x); }
 
 int
-decode_opcode ()
+decode_opcode (void)
 {
   unsigned int uma=0, umb=0;
   int ma=0, mb=0;
diff --git a/sim/rx/syscalls.c b/sim/rx/syscalls.c
index 1a6f65f..2f89da1 100644
--- a/sim/rx/syscalls.c
+++ b/sim/rx/syscalls.c
@@ -69,7 +69,7 @@ get_callbacks (void)
 int argp, stackp;
 
 static int
-arg ()
+arg (void)
 {
   int rv = 0;
   argp++;