[rfa] Add -m; Was: ARM sim patch: increase default target memory

[Andrew Cagney <ac131313@cygnus.com>]

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Hello,

The attatched patch (er, hack), adds support for the -m flag from the 
GDB command line (vis (gdb) target sim -m<size>).  It also sets the 
default memory size back to something consistent with the other simulators.

ok?
Andrew

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2002-04-07  Andrew Cagney  <ac131313@redhat.com>

	* wrapper.c (sim_open): Add support for -m<mem-size>.
	(mem_size): Reduce to 2MB.
	Fix PR gdb/433.

Index: wrapper.c
===================================================================
RCS file: /cvs/src/src/sim/arm/wrapper.c,v
retrieving revision 1.18
diff -u -r1.18 wrapper.c
--- wrapper.c	18 Mar 2002 21:43:15 -0000	1.18
+++ wrapper.c	7 Apr 2002 16:59:18 -0000
@@ -47,7 +47,7 @@
 static char *myname;
 
 /* Memory size in bytes.  */
-static int mem_size = (1 << 23);
+static int mem_size = (1 << 21);
 
 /* Non-zero to display start up banner, and maybe other things.  */
 static int verbosity;
@@ -448,7 +448,7 @@
     {
       int i;
 
-      /* Scan for endian-ness switch.  */
+      /* Scan for endian-ness and memory-size switches.  */
       for (i = 0; (argv[i] != NULL) && (argv[i][0] != 0); i++)
 	if (argv[i][0] == '-' && argv[i][1] == 'E')
 	  {
@@ -482,6 +482,23 @@
 		  (sim_callback, "Unrecognised argument to -E option\n");
 		break;
 	      }
+	  }
+	else if (argv[i][0] == '-' && argv[i][1] == 'm')
+	  {
+	    if (argv[i][2] != '\0')
+	      sim_size (atoi (&argv[i][2]));
+	    else if (argv[i + 1] != NULL)
+	      {
+		sim_size (atoi (argv[i + 1]));
+		i++;
+	      }
+	    else
+	      {
+		sim_callback->printf_filtered (sim_callback,
+					       "Missing argument to -m option\n");
+		return NULL;
+	      }
+	      
 	  }
     }