enhance OEA behavior.

sim/ppc/ChangeLog

@@ -1,3 +1,16 @@
+Thu Sep 21 16:26:49 1995  Michael Meissner  <meissner@tiktok.cygnus.com>
+
+	* std-config.h (WITH_TRACE): Default to 1 now.
+
+	* psim.c (write_stack_arguments): Don't write any stack arguments
+	if OEA.
+
+	* main.c (main): Switch to using getopt.  Make -p also set
+	trace_semantics.
+
+	* device_tree.c (create_option_device_node): Assume a program is
+	OEA if the start address is < 4096, not just == 0.
+
 Wed Sep 20 13:36:06 1995  Ian Lance Taylor  <ian@cygnus.com>
 
 	* Makefile.in (maintainer-clean): New synonym for realclean.

sim/ppc/device_tree.c

@@ -34,6 +34,12 @@
 
 #include "bfd.h"
 
+/* Any starting address less than this is assumed to be an OEA program
+   rather than VEA.  */
+#ifndef OEA_START_ADDRESS
+#define	OEA_START_ADDRESS 4096
+#endif
+
 enum { clayton_memory_size = 0x100000 };
 
 /* insert the address into the device_nodes sorted list of addresses */
@@ -174,6 +180,8 @@ STATIC_INLINE_DEVICE_TREE device_node *
 create_option_device_node(device_node *root,
 			  bfd *image)
 {
+  int oea = (bfd_get_start_address(image) < OEA_START_ADDRESS);
+  int elf = (image->xvec->flavour == bfd_target_elf_flavour);
   device_node *option_node;
   
   /* the option node and than its members */
@@ -200,9 +208,9 @@ create_option_device_node(device_node *root,
 		     "stack-pointer",
 		     integer_type_device,
 		     NULL,
-		     (void*)(bfd_get_start_address(image) == 0
+		     (void *)((oea)
 			     ? clayton_memory_size /* OEA */
-			     : (image->xvec->flavour == bfd_target_elf_flavour
+			     : ((elf)
 				? 0xe0000000 /* elf */
 				: 0x20000000 /* xcoff */)));
 
@@ -211,9 +219,7 @@ create_option_device_node(device_node *root,
 		     "vea?",
 		     boolean_type_device,
 		     NULL,
-		     (void*)(bfd_get_start_address(image) == 0
-			     ? 0
-			     : -1));
+		     (void *)((oea) ? 0 : -1));
 
   /* what type of binary */
   TRACE(trace_tbd, ("create_optioin_device_node() - TBD - NT/OpenBoot?\n"));
@@ -221,9 +227,7 @@ create_option_device_node(device_node *root,
 		     "elf?",
 		     boolean_type_device,
 		     NULL,
-		     (void*)(image->xvec->flavour == bfd_target_elf_flavour
-			     ? -1 /* elf binary */
-			     : 0 /* probably aix binary */));
+		     (void *)((elf) ? -1 : 0));
 
   /* must all memory transfers be naturally aligned? */
   device_node_create(option_node,
@@ -232,7 +236,7 @@ create_option_device_node(device_node *root,
 		     NULL,
 		     (void*)((WITH_ALIGNMENT == NONSTRICT_ALIGNMENT
 			      || image->xvec->byteorder_big_p
-			      || bfd_get_start_address(image) != 0)
+			      || !oea)
 			     ? 0
 			     : -1));
 

sim/ppc/main.c

@@ -0,0 +1,145 @@
+/*  This file is part of the program psim.
+
+    Copyright (C) 1994-1995, Andrew Cagney <cagney@highland.com.au>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+ 
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ 
+    */
+
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "psim.h"
+
+extern char **environ;
+extern char *optarg;
+extern int optind;
+extern int optopt;
+extern int opterr;
+
+void
+printf_filtered(char *msg, ...)
+{
+  va_list ap;
+  va_start(ap, msg);
+  vprintf(msg, ap);
+}
+
+void
+error (char *msg, ...)
+{
+  va_list ap;
+  va_start(ap, msg);
+  vprintf(msg, ap);
+  exit (1);
+}
+
+void *
+zalloc(long size)
+{
+  void *memory = malloc(size);
+  if (memory == NULL)
+    error("zmalloc failed\n");
+  bzero(memory, size);
+  return memory;
+}
+
+void
+zfree(void *chunk)
+{
+  free(chunk);
+}
+
+static void
+usage(void)
+{
+  error ("Usage: psim [ -p -c -s -i -t ] <image> [ <image-args> ... ]\n");
+}
+
+int
+main(int argc, char **argv)
+{
+  psim *system;
+  char **argp;
+  const char *name_of_file;
+  char *arg_;
+  unsigned_word stack_pointer;
+  psim_status status;
+  int letter;
+
+  /* check for arguments - FIXME use getopt */
+  while ((letter = getopt (argc, argv, "cipst")) != EOF)
+    {
+      switch (argp[0][1]) {
+      case 'p':
+	trace[trace_cpu] = trace[trace_semantics] = 1;
+	break;
+      case 'c':
+	trace[trace_core] = 1;
+	break;
+      case 's':
+	trace[trace_create_stack] = 1;
+	break;
+      case 'i':
+	trace[trace_icu_device] = 1;
+	break;
+      case 't':
+	trace[trace_device_tree] = 1;
+	break;
+      default:
+	usage();
+      }
+    }
+
+  if (argp >= argv+argc)
+    usage();
+  name_of_file = *argp;
+
+  /* create the simulator */
+  system = psim_create(name_of_file, ((WITH_SMP > 0) ? WITH_SMP : 1));
+
+  /* fudge the environment so that _=prog-name */
+  arg_ = (char*)zalloc(strlen(*argp) + strlen("_=") + 1);
+  strcpy(arg_, "_=");
+  strcat(arg_, *argp);
+  putenv(arg_);
+
+  /* initialize it */
+  psim_load(system);
+  psim_stack(system, argp, environ);
+
+  psim_run(system);
+
+  /* why did we stop */
+  status = psim_get_status(system);
+  switch (status.reason) {
+  case was_continuing:
+    error("psim: continuing while stoped!\n");
+    return 0;
+  case was_trap:
+    error("psim: no trap insn\n");
+    return 0;
+  case was_exited:
+    return status.signal;
+  case was_signalled:
+    return status.signal;
+  default:
+    error("unknown halt condition\n");
+    return 0;
+  }
+}