* remote-sim.c: first attempt at general simulator interface

	* remote-hms.c: whitespace
	* h8300-tdep.c: (h8300_skip_prologue, examine_prologue):
	understand new stack layout. (print_register_hook): print ccr
	register in a fancy way.

1 files changed, 293 insertions, 0 deletions

diff --git a/gdb/remote-sim.c b/gdb/remote-sim.c
new file mode 100644
index 0000000..92be34a
--- /dev/null
+++ b/gdb/remote-sim.c
@@ -0,0 +1,293 @@
+/* Remote debugging interface for generalized simulator
+   Copyright 1992 Free Software Foundation, Inc.
+   Contributed by Cygnus Support.  Written by Steve Chamberlain
+   (sac@cygnus.com).
+
+This file is part of GDB.
+
+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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "defs.h"
+#include "inferior.h"
+#include "wait.h"
+#include "value.h"
+#include <string.h>
+#include <ctype.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <setjmp.h>
+#include <errno.h>
+#include "terminal.h"
+#include "target.h"
+#include "gdbcore.h"
+
+/* Forward data declarations */
+extern struct target_ops sim_ops;		/* Forward declaration */
+
+int
+sim_write_inferior_memory (memaddr, myaddr, len)
+     CORE_ADDR memaddr;
+     unsigned char *myaddr;
+     int len;
+{
+  return  sim_write(memaddr, myaddr, len);
+}
+
+static int
+store_register(regno)
+int regno;
+{
+  if (regno  == -1) 
+  {
+    for (regno = 0; regno < NUM_REGS; regno++)
+     store_register(regno);
+  }
+  else 
+  {
+    sim_store_register(regno, read_register(regno));
+  }
+  return 0;
+}
+
+
+/*
+ * Download a file specified in 'args', to the sim. 
+ */
+static void
+sim_load(args,fromtty)
+char	*args;
+int	fromtty;
+{
+  bfd	*abfd;
+  asection *s;
+
+  inferior_pid = 0;  
+  abfd = bfd_openr(args, (char*)0);
+
+  if (!abfd) 
+  {
+    printf_filtered("Unable to open file %s\n", args);
+    return;
+  }
+
+  if (bfd_check_format(abfd, bfd_object) ==0) 
+  {
+    printf_filtered("File is not an object file\n");
+    return ;
+  }
+
+  s = abfd->sections;
+  while (s != (asection *)NULL) 
+  {
+    if (s->flags & SEC_LOAD) 
+    {
+      int i;
+      int delta = 4096;
+      char *buffer = xmalloc(delta);
+      printf_filtered("%s\t: 0x%4x .. 0x%4x  ",
+		      s->name, s->vma, s->vma + s->_raw_size);
+      for (i = 0; i < s->_raw_size; i+= delta) 
+      {
+	int sub_delta = delta;
+	if (sub_delta > s->_raw_size - i)
+	 sub_delta = s->_raw_size - i ;
+
+	bfd_get_section_contents(abfd, s, buffer, i, sub_delta);
+	sim_write_inferior_memory(s->vma + i, buffer, sub_delta);
+	printf_filtered("*");
+	fflush(stdout);
+      }
+      printf_filtered(  "\n");      
+      free(buffer);
+    }
+    s = s->next;
+  }
+
+  sim_store_register(PC_REGNUM, abfd->start_address);
+}
+
+/* This is called not only when we first attach, but also when the
+   user types "run" after having attached.  */
+void
+sim_create_inferior (execfile, args, env)
+     char *execfile;
+     char *args;
+     char **env;
+{
+  int entry_pt;
+
+  if (args && *args)
+   error ("Can't pass arguments to remote sim process.");
+
+  if (execfile == 0 || exec_bfd == 0)
+   error ("No exec file specified");
+
+  entry_pt = (int) bfd_get_start_address (exec_bfd);
+  init_wait_for_inferior ();
+  insert_breakpoints ();
+  proceed(entry_pt, -1, 0);
+}
+
+
+
+static int
+sim_open (name, from_tty)
+     char *name;
+     int from_tty;
+{
+  if(name == 0) 
+  {
+    name = "";
+  }
+
+  push_target (&sim_ops);
+  target_fetch_registers(-1);
+  printf_filtered("Connected to the simulator.\n");
+}
+
+/* Close out all files and local state before this target loses control. */
+
+static int
+sim_close (quitting)
+     int quitting;
+{
+}
+
+/* Terminate the open connection to the remote debugger.
+   Use this when you want to detach and do something else
+   with your gdb.  */
+int
+sim_detach (args,from_tty)
+     char *args;
+     int from_tty;
+{
+  pop_target();			/* calls sim_close to do the real work */
+  if (from_tty)
+   printf_filtered ("Ending remote %s debugging\n", target_shortname);
+  return 0;
+}
+ 
+/* Tell the remote machine to resume.  */
+
+
+/* Wait until the remote machine stops, then return,
+   storing status in STATUS just as `wait' would.  */
+
+int
+sim_wait (status)
+     WAITTYPE *status;
+{
+  WSETSTOP(*status, sim_stop_signal());  
+  return 0;
+}
+
+
+
+static void
+fetch_register(regno)
+int regno;
+{
+  if (regno  == -1) 
+  {
+    for (regno = 0; regno < NUM_REGS; regno++)
+     fetch_register(regno);
+  }
+  else 
+  {
+    char buf[MAX_REGISTER_RAW_SIZE];
+    sim_fetch_register(regno, buf);
+    supply_register(regno, buf);
+  }
+}
+
+
+int
+sim_xfer_inferior_memory(memaddr, myaddr, len, write, target)
+     CORE_ADDR memaddr;
+     char *myaddr;
+     int len;
+     int write;
+     struct target_ops *target;			/* ignored */
+{
+  if (write)
+  {
+    sim_write(memaddr, myaddr, len);
+  }
+  else 
+  {
+    sim_read(memaddr, myaddr, len);
+  } 
+  return len;
+}
+
+
+/* This routine is run as a hook, just before the main command loop is
+   entered.  If gdb is configured for the H8, but has not had its
+   target specified yet, this will loop prompting the user to do so.
+*/
+
+void
+sim_before_main_loop ()
+{
+  push_target (&sim_ops);
+}
+
+
+static int rem_resume(a,b)
+{
+  sim_resume(a,b);
+  return 0;
+}
+
+pstore()
+{
+  return 1;
+}
+/* Define the target subroutine names */
+
+struct target_ops sim_ops = 
+{
+  "sim", "simulator",
+  "Use the simulator",
+  sim_open, sim_close, 
+  0, sim_detach, rem_resume, sim_wait, /* attach */
+  fetch_register, store_register,
+  pstore,
+  sim_xfer_inferior_memory, 
+  0,
+  0, 0, /* Breakpoints */
+  0, 0, 0, 0, 0,		/* Terminal handling */
+  pstore,
+  sim_load, 
+  0,				/* lookup_symbol */
+  sim_create_inferior,		/* create_inferior */ 
+  pstore,			/* mourn_inferior FIXME */
+  0,				/* can_run */
+  0,				/* notice_signals */
+  process_stratum, 0,		/* next */
+  1, 1, 1, 1, 1,		/* all mem, mem, stack, regs, exec */
+  0,0,				/* Section pointers */
+  OPS_MAGIC,			/* Always the last thing */
+};
+
+/***********************************************************************/
+
+void
+_initialize_remote_sim ()
+{
+  add_target (&sim_ops);
+}
+
+