Use sim_state_alloc to create common sim object.

sim/common/ChangeLog

@@ -1,3 +1,13 @@
+Mon Sep  1 10:50:11 1997  Andrew Cagney  <cagney@b1.cygnus.com>
+
+	* sim-utils.c (sim_state_alloc): Set CPU backlinks, callback and
+ 	kind.
+  	
+	* sim-base.h (sim_state_alloc): Add callback and kind arguments.
+	
+	* sim-base.h (INVALID_INSTRUCTION_ADDRESS): Add default
+ 	definition.
+
 Sat Aug 30 09:47:21 1997  Andrew Cagney  <cagney@b1.cygnus.com>
 
 	* sim-fpu.c (DP_GARDMSB, ...): Make unsigned.

sim/common/sim-base.h

@@ -21,25 +21,23 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 /* Simulator state pseudo baseclass.
 
-   Each simulator is required to have a sim-main.h file that includes
-   sim-basics.h, defines the base type sim_cia (the data type that
-   contains the complete current instruction address information), and
-   then sim-base.h:
+   Each simulator is required to have the file ``sim-main.h''.  That
+   file includes ``sim-basics.h'', defines the base type ``sim_cia''
+   (the data type that contains complete current instruction address
+   information), include ``sim-base.h'':
 
      #include "sim-basics.h"
      typedef address_word sim_cia;
      #include "sim-base.h"
    
-   and defines two key simulator structures.  Firstly, struct
-   _sim_cpu:
+   finally, two data types ``struct _sim_cpu' and ``struct sim_state'
+   are defined:
 
      struct _sim_cpu {
         ... simulator specific members ...
         sim_cpu_base base;
      };
 
-   and secondly, struct sim_state (which uses the sim_cpu structure):
-
      struct sim_state {
        sim_cpu cpu[MAX_NR_PROCESSORS];
      #if (WITH_SMP)
@@ -64,6 +62,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #ifndef NULL_CIA
 #define NULL_CIA ((sim_cia) 0)
 #endif
+#ifndef INVALID_INSTRUCTION_ADDRESS
+#define INVALID_INSTRUCTION_ADDRESS ((address_word)0 - 1)
+#endif
 typedef struct _sim_cpu sim_cpu;
 
 #include "sim-module.h"
@@ -258,7 +259,7 @@ typedef struct {
 
 
 /* Functions for allocating/freeing a sim_state.  */
-SIM_DESC sim_state_alloc PARAMS ((void));
+SIM_DESC sim_state_alloc PARAMS ((SIM_OPEN_KIND kind, host_callback *callback));
 void sim_state_free PARAMS ((SIM_DESC));
 
 

sim/common/sim-utils.c

@@ -53,7 +53,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
    Set by sim_resume.  */
 struct sim_state *current_state;
 
-/* Allocate zero filled memory with xmalloc.  */
+/* Allocate zero filled memory with xmalloc - xmalloc aborts of the
+   allocation fails.  */
 
 void *
 zalloc (unsigned long size)
@@ -72,10 +73,16 @@ zfree (void *data)
 /* Allocate a sim_state struct.  */
 
 SIM_DESC
-sim_state_alloc (void)
+sim_state_alloc (SIM_OPEN_KIND kind,
+		 host_callback *callback)
 {
-  SIM_DESC sd = zalloc (sizeof (struct sim_state));
-  sd->base.magic = SIM_MAGIC_NUMBER;
+  int cpu_nr;
+  SIM_DESC sd = ZALLOC (struct sim_state);
+  STATE_MAGIC (sd) = SIM_MAGIC_NUMBER;
+  STATE_CALLBACK (sd) = callback;
+  STATE_OPEN_KIND (sd) = kind;
+  for (cpu_nr = 0; cpu_nr < MAX_NR_PROCESSORS; cpu_nr++)
+    CPU_STATE (STATE_CPU (sd, cpu_nr)) = sd;
   return sd;
 }
 

sim/tic80/ChangeLog

@@ -1,3 +1,8 @@
+Mon Sep  1 11:06:30 1997  Andrew Cagney  <cagney@b1.cygnus.com>
+
+	* sim-calls.c (sim_open): Use sim_state_alloc
+	(simulation): Delete.
+
 Sat Aug 30 09:40:47 1997  Andrew Cagney  <cagney@b1.cygnus.com>
 
 	* insns (do_trap): Unsigned `i' for unsigned iterator.

sim/tic80/sim-calls.c

@@ -44,21 +44,13 @@
 
 #define SIM_ADDR unsigned
 
-/* Structures used by the simulator, for gdb just have static structures */
-
-struct sim_state simulation = { 0 };
-
-
 SIM_DESC
 sim_open (SIM_OPEN_KIND kind,
 	  host_callback *callback,
 	  struct _bfd *abfd,
 	  char **argv)
 {
-  SIM_DESC sd = &simulation;
-  STATE_OPEN_KIND (sd) = kind;
-  STATE_MAGIC (sd) = SIM_MAGIC_NUMBER;
-  STATE_CALLBACK (&simulation) = callback;
+  SIM_DESC sd = sim_state_alloc (kind, callback);
 
   if (sim_pre_argv_init (sd, argv[0]) != SIM_RC_OK)
     return 0;