sim: namespace sim_machs

We want to do a single build with all arches in one binary which means
we need to namespace sim_machs on a per-arch basis.  Move it from a
global variable to the sim description structure so it can be setup at
runtime.

Changing the SIM_MODEL->num from an enum to an int is unfortunate, but
we specifically don't want to maintain a centralized list anymore, and
this was never used directly in common code, just passed to per-arch
callbacks.

sim/lm32/ChangeLog

@@ -1,3 +1,10 @@
+2021-06-30  Mike Frysinger  <vapier@gentoo.org>
+
+	* arch.c (sim_machs): Rename to ...
+	(lm32_sim_machs): ... this.
+	* sim-if.c (lm32_sim_machs): New decl.
+	(sim_open): Set STATE_MACH.
+
 2021-06-29  Mike Frysinger  <vapier@gentoo.org>
 
 	* arch.c (sim_machs): Mark const.

sim/lm32/arch.c

@@ -24,7 +24,7 @@ This file is part of the GNU simulators.
 #include "sim-main.h"
 #include "bfd.h"
 
-const SIM_MACH * const sim_machs[] =
+const SIM_MACH * const lm32_sim_machs[] =
 {
 #ifdef HAVE_CPU_LM32BF
   & lm32_mach,

sim/lm32/sim-if.c

@@ -80,6 +80,8 @@ find_limit (SIM_DESC sd)
   return (addr + 65536) & ~(0xffffUL);
 }
 
+extern const SIM_MACH * const lm32_sim_machs[];
+
 /* Create an instance of the simulator.  */
 
 SIM_DESC
@@ -92,6 +94,7 @@ sim_open (SIM_OPEN_KIND kind, host_callback *callback, struct bfd *abfd,
   unsigned long base, limit;
 
   /* Set default options before parsing user options.  */
+  STATE_MACHS (sd) = lm32_sim_machs;
   current_alignment = STRICT_ALIGNMENT;
   current_target_byte_order = BFD_ENDIAN_BIG;