import gdb-1999-06-07 snapshot

2 files changed, 984 insertions, 0 deletions

diff --git a/gdb/config/tm-vxworks.h b/gdb/config/tm-vxworks.h
new file mode 100644
index 0000000..8653f88
--- /dev/null
+++ b/gdb/config/tm-vxworks.h
@@ -0,0 +1,22 @@
+/* Target machine description for VxWorks, for GDB, the GNU debugger.
+   Copyright 1999 Free Software Foundation, Inc.
+
+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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#define	GDBINIT_FILENAME	".vxgdbinit"
+
+#define	DEFAULT_PROMPT		"(vxgdb) "
diff --git a/gdb/v850ice.c b/gdb/v850ice.c
new file mode 100644
index 0000000..da2b4c9
--- /dev/null
+++ b/gdb/v850ice.c
@@ -0,0 +1,962 @@
+/* ICE interface for the NEC V850 for GDB, the GNU debugger.
+   Copyright 1996, Free Software Foundation, Inc.
+
+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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "defs.h"
+#include "gdb_string.h"
+#include "frame.h"
+#include "symtab.h"
+#include "inferior.h"
+#include "breakpoint.h"
+#include "symfile.h"
+#include "target.h"
+#include "objfiles.h"
+#include "gdbcore.h"
+#include "value.h"
+#include "command.h"
+
+#include <windows.h>
+#include <winuser.h> /* for WM_USER */
+
+extern unsigned long int strtoul(const char *nptr, char **endptr,
+                                 int base);
+ 
+/* Local data definitions */
+struct MessageIO
+{
+  int    size;   /* length of input or output in bytes         */
+  char * buf;    /* buffer having the input/output information */
+};
+
+/* Prototypes for functions located in other files */
+extern void break_command PARAMS ((char *, int));
+
+extern void stepi_command PARAMS ((char *, int));
+
+extern void nexti_command PARAMS ((char *, int));
+
+extern void continue_command PARAMS ((char *, int));
+
+extern int (*ui_loop_hook) PARAMS ((int));
+
+/* Prototypes for local functions */
+static int init_hidden_window PARAMS ((void));
+
+static LRESULT CALLBACK v850ice_wndproc PARAMS ((HWND, UINT, WPARAM, LPARAM));
+
+static void v850ice_files_info PARAMS ((struct target_ops *ignore));
+
+static int v850ice_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr,
+					int len, int should_write,
+					struct target_ops *target));
+
+static void v850ice_prepare_to_store PARAMS ((void));
+
+static void v850ice_fetch_registers PARAMS ((int regno));
+
+static void v850ice_resume PARAMS ((int pid, int step,
+				   enum target_signal siggnal));
+
+static void v850ice_open PARAMS ((char *name, int from_tty));
+
+static void v850ice_close PARAMS ((int quitting));
+
+static void v850ice_stop PARAMS ((void));
+
+static void v850ice_store_registers PARAMS ((int regno));
+
+static void v850ice_mourn PARAMS ((void));
+
+static int v850ice_wait PARAMS ((int pid, struct target_waitstatus *status));
+
+static void v850ice_kill PARAMS ((void));
+
+static void v850ice_detach PARAMS ((char *args, int from_tty));
+
+static int v850ice_insert_breakpoint PARAMS ((CORE_ADDR, char *));
+
+static int v850ice_remove_breakpoint PARAMS ((CORE_ADDR, char *));
+
+static void v850ice_command PARAMS ((char *, int));
+
+static int ice_disassemble PARAMS ((unsigned long, int, char *));
+
+static int ice_lookup_addr PARAMS ((unsigned long *, char *, char *));
+
+static int ice_lookup_symbol PARAMS ((unsigned long, char *));
+
+static void ice_SimulateDisassemble PARAMS ((char *, int));
+
+static void ice_SimulateAddrLookup PARAMS ((char *, int));
+
+static void ice_Simulate_SymLookup PARAMS ((char *, int));
+
+static void ice_fputs PARAMS ((const char *, GDB_FILE *));
+
+static int ice_file PARAMS ((char *));
+
+static int ice_cont PARAMS ((char *));
+
+static int ice_stepi PARAMS ((char *));
+
+static int ice_nexti PARAMS ((char *));
+
+static void togdb_force_update PARAMS ((void));
+
+static void do_gdb (char *, char *, void (*func) PARAMS ((char *, int)), int);
+
+
+/* Globals */
+static HWND hidden_hwnd;                 /* HWND for messages */
+
+long (__stdcall *ExeAppReq) PARAMS ((char *, long, char *, struct MessageIO *));
+
+long (__stdcall *RegisterClient) PARAMS ((HWND));
+
+long (__stdcall *UnregisterClient) PARAMS ((void));
+
+
+/* Globals local to this file only */
+static int ice_open = 0;        /* Is ICE open? */
+
+static char * v850_CB_Result;   /* special char array for saving 'callback' results */
+
+static int SimulateCallback;    /* simulate a callback event */
+
+#define MAX_BLOCK_SIZE    64*1024   /* Cannot transfer memory in blocks bigger
+                                       than this */
+/* MDI/ICE Message IDs */
+#define GSINGLESTEP     0x200   /* single-step target          */
+#define GRESUME         0x201   /* resume target               */
+#define GREADREG        0x202   /* read a register             */
+#define GWRITEREG       0x203   /* write a register            */
+#define GWRITEBLOCK     0x204   /* write a block of memory     */
+#define GREADBLOCK      0x205   /* read a block of memory      */
+#define GSETBREAK       0x206   /* set a breakpoint            */
+#define GREMOVEBREAK    0x207   /* remove a breakpoint         */
+#define GHALT           0x208   /* ??? */
+#define GCHECKSTATUS    0x209   /* check status of ICE         */
+#define GMDIREPLY       0x210   /* Reply for previous query - NOT USED */
+#define GDOWNLOAD       0x211   /* something for MDI           */
+#define GCOMMAND        0x212   /* execute command in ice      */
+#define GLOADFILENAME   0x213   /* retrieve load filename      */
+#define GWRITEMEM       0x214   /* write word, half-word, or byte */
+
+/* GCHECKSTATUS return codes: */
+#define ICE_Idle        0x00
+#define ICE_Breakpoint  0x01    /* hit a breakpoint */
+#define ICE_Stepped     0x02    /* have stepped     */
+#define ICE_Exception   0x03    /* have exception   */
+#define ICE_Halted      0x04    /* hit a user halt  */
+#define ICE_Exited      0x05    /* called exit      */
+#define ICE_Terminated  0x06    /* user terminated  */
+#define ICE_Running     0x07
+#define ICE_Unknown     0x99
+
+/* Windows messages */
+#define WM_STATE_CHANGE WM_USER+101
+#define WM_SYM_TO_ADDR  WM_USER+102
+#define WM_ADDR_TO_SYM  WM_USER+103
+#define WM_DISASSEMBLY  WM_USER+104
+#define WM_SOURCE       WM_USER+105
+
+/* STATE_CHANGE codes */
+#define STATE_CHANGE_REGS   1   /* Register(s) changed */
+#define STATE_CHANGE_LOAD   2   /* HW reset            */
+#define STATE_CHANGE_RESET  3   /* Load new file       */
+#define STATE_CHANGE_CONT   4   /* Run target          */
+#define STATE_CHANGE_STOP   5   /* Stop target         */
+#define STATE_CHANGE_STEPI  6   /* Stepi target        */
+#define STATE_CHANGE_NEXTI  7   /* Nexti target        */
+
+static struct target_ops v850ice_ops;	/* Forward decl */
+
+/* This function creates a hidden window */
+static int
+init_hidden_window ()
+{
+  WNDCLASS class;
+
+  if (hidden_hwnd != NULL)
+    return 1;
+
+  class.style = 0;
+  class.cbClsExtra = 0;
+  class.cbWndExtra = 0;
+  class.hInstance = GetModuleHandle (0);
+  class.hbrBackground = NULL;
+  class.lpszMenuName = NULL;
+  class.lpszClassName = "gdb_v850ice";
+  class.lpfnWndProc = v850ice_wndproc;
+  class.hIcon = NULL;
+  class.hCursor = NULL;
+
+  if (! RegisterClass (&class))
+    return 0;
+
+  hidden_hwnd = CreateWindow ("gdb_v850ice", "gdb_v850ice", WS_TILED,
+                              0, 0, 0, 0, NULL, NULL, class.hInstance,
+                              NULL);
+  if (hidden_hwnd == NULL)
+    {
+      char buf[200];
+      DWORD err;
+
+      err = GetLastError ();
+      FormatMessage (FORMAT_MESSAGE_FROM_SYSTEM, NULL, err,
+                     0, buf, 200, NULL);
+      printf_unfiltered ("Could not create window: %s", buf);
+      return 0;
+    }
+
+  return 1;
+}
+
+/* 
+   This function is installed as the message handler for the hidden window
+   which QBox will use to communicate with gdb. It recognize and acts
+   on the following messages:
+
+   WM_SYM_TO_ADDR  \
+   WM_ADDR_TO_SYM   | Not implemented at NEC's request
+   WM_DISASSEMBLY  /
+   WM_STATE_CHANGE - tells us that a state change has occured in the ICE
+*/
+static LRESULT CALLBACK
+v850ice_wndproc (hwnd, message, wParam, lParam)
+     HWND hwnd;
+     UINT message;
+     WPARAM wParam;
+     LPARAM lParam;
+{
+  LRESULT result = FALSE;
+
+  switch (message)
+    {
+    case WM_SYM_TO_ADDR:
+      MessageBox (0, "Symbol resolution\nNot implemented", "GDB", MB_OK);
+      break;
+    case WM_ADDR_TO_SYM:
+      MessageBox (0, "Address resolution\nNot implemented", "GDB", MB_OK);
+      break;
+    case WM_SOURCE:
+      break;
+    case WM_STATE_CHANGE:
+      switch (wParam)
+        {
+        case STATE_CHANGE_LOAD:
+          {
+            struct MessageIO iob;
+            char buf[128];
+
+            iob.buf  = buf;
+            iob.size = 128;
+
+            /* Load in a new file... Need filename */
+            ExeAppReq ("GDB", GLOADFILENAME, NULL, &iob);
+            if (!catch_errors ((catch_errors_ftype *) ice_file, iob.buf, "", RETURN_MASK_ALL))
+              printf_unfiltered ("load errored\n");
+          }
+          break;
+        case STATE_CHANGE_RESET:
+          registers_changed ();
+          flush_cached_frames ();
+          togdb_force_update ();
+          result = TRUE;
+          break;
+        case STATE_CHANGE_REGS:
+          registers_changed ();
+          togdb_force_update ();
+          result = TRUE;
+          break;
+        case STATE_CHANGE_CONT:
+          if (!catch_errors ((catch_errors_ftype *)ice_cont, NULL, "", RETURN_MASK_ALL))
+            printf_unfiltered ("continue errored\n");
+          result = TRUE;
+          break;
+        case STATE_CHANGE_STEPI:
+          if (!catch_errors ((catch_errors_ftype *)ice_stepi, (PTR)(int) lParam, "",
+                             RETURN_MASK_ALL))
+            printf_unfiltered ("stepi errored\n");
+          result = TRUE;
+          break;
+        case STATE_CHANGE_NEXTI:
+          if (!catch_errors ((catch_errors_ftype *)ice_nexti, (PTR)(int) lParam, "",
+                             RETURN_MASK_ALL))
+            printf_unfiltered ("nexti errored\n");
+          result = TRUE;
+          break;
+        }
+    }
+
+  if (result == FALSE)
+    return DefWindowProc (hwnd, message, wParam, lParam);
+
+  return FALSE;
+}
+
+/* Code for opening a connection to the ICE.  */
+
+static void
+v850ice_open (name, from_tty)
+     char *name;
+     int from_tty;
+{
+  HINSTANCE handle;
+
+  if (name)
+    error ("Too many arguments.");
+
+  target_preopen (from_tty);
+
+  unpush_target (&v850ice_ops);
+
+  if (from_tty)
+    puts_filtered ("V850ice debugging\n");
+
+  push_target (&v850ice_ops);	/* Switch to using v850ice target now */
+
+  target_terminal_init ();
+
+  /* Initialize everything necessary to facilitate communication
+     between QBox, gdb, and the DLLs which control the ICE */
+  if (ExeAppReq == NULL)
+    {
+      handle = LoadLibrary ("necmsg.dll");
+      if (handle == NULL)
+        error ("Cannot load necmsg.dll");
+
+      ExeAppReq = (long (*) PARAMS ((char *, long, char *, struct MessageIO *)))
+        GetProcAddress (handle, "ExeAppReq");
+      RegisterClient = (long (*) PARAMS ((HWND)))
+        GetProcAddress (handle, "RegisterClient");
+      UnregisterClient = (long (*) PARAMS ((void)))
+        GetProcAddress (handle, "UnregisterClient");
+
+      if (ExeAppReq == NULL || RegisterClient == NULL || UnregisterClient == NULL)
+        error ("Could not find requisite functions in necmsg.dll.");
+
+      if (!init_hidden_window ())
+        error ("could not initialize message handling");
+    }
+
+  /* Tell the DLL we are here */
+  RegisterClient (hidden_hwnd);
+
+  ice_open = 1;
+
+  /* Without this, some commands which require an active target (such as kill)
+     won't work.  This variable serves (at least) double duty as both the pid
+     of the target process (if it has such), and as a flag indicating that a
+     target is active.  These functions should be split out into seperate
+     variables, especially since GDB will someday have a notion of debugging
+     several processes.  */
+  inferior_pid = 42000;
+
+  start_remote ();
+  return;
+}
+
+/* Clean up connection to a remote debugger.  */
+
+/* ARGSUSED */
+static void
+v850ice_close (quitting)
+     int quitting;
+{
+  if (ice_open)
+    {
+      UnregisterClient ();
+      ice_open = 0;
+      inferior_pid = 0;
+    }
+}
+
+/* Stop the process on the ice. */
+static void
+v850ice_stop ()
+{
+  /* This is silly, but it works... */
+  v850ice_command ("stop", 0);
+}
+
+static void
+v850ice_detach (args, from_tty)
+     char *args;
+     int from_tty;
+{
+  if (args)
+    error ("Argument given to \"detach\" when remotely debugging.");
+
+  pop_target ();
+  if (from_tty)
+    puts_filtered ("Ending v850ice debugging.\n");
+}
+
+/* Tell the remote machine to resume.  */
+
+static void
+v850ice_resume (pid, step, siggnal)
+     int pid, step;
+     enum target_signal siggnal;
+{
+  long              retval;
+  char              buf[256];
+  struct MessageIO  iob;
+
+  iob.size = 0;
+  iob.buf  = buf;
+
+  if (step)
+    retval = ExeAppReq ("GDB", GSINGLESTEP, "step", &iob);
+  else
+    retval = ExeAppReq ("GDB", GRESUME, "run", &iob);
+
+  if (retval)
+    error ("ExeAppReq (step = %d) returned %d", step, retval);
+}
+
+/* Wait until the remote machine stops, then return,
+   storing status in STATUS just as `wait' would.
+   Returns "pid" (though it's not clear what, if anything, that
+   means in the case of this target).  */
+
+static int
+v850ice_wait (pid, status)
+     int pid;
+     struct target_waitstatus *status;
+{
+  long v850_status;
+  char buf[256];
+  struct MessageIO  iob;
+  int done = 0;
+  int count = 0;
+
+  iob.size = 0;
+  iob.buf  = buf;
+  
+  do
+    {
+      if (count++ % 100000)
+        {
+          ui_loop_hook (0);
+	  count = 0;
+        }
+
+      v850_status = ExeAppReq ("GDB", GCHECKSTATUS, NULL, &iob);
+
+      switch (v850_status)
+        {
+        case ICE_Idle:
+        case ICE_Breakpoint:
+        case ICE_Stepped:
+        case ICE_Halted:
+          status->kind = TARGET_WAITKIND_STOPPED;
+          status->value.sig = TARGET_SIGNAL_TRAP;
+          done = 1;
+          break;
+        case ICE_Exception:
+          status->kind = TARGET_WAITKIND_SIGNALLED;
+          status->value.sig = TARGET_SIGNAL_SEGV;
+          done = 1;
+          break;
+        case ICE_Exited:
+          status->kind = TARGET_WAITKIND_EXITED;
+          status->value.integer = 0;
+          done = 1;
+          break;
+        case ICE_Terminated:
+          status->kind = TARGET_WAITKIND_SIGNALLED;
+          status->value.sig = TARGET_SIGNAL_KILL;
+          done = 1;
+          break;
+        default:
+          break;
+        }
+    }
+  while (!done);
+      
+  return inferior_pid;
+}
+
+static int
+convert_register (regno, buf)
+     int regno;
+     char *buf;
+{
+  if (regno <= 31)
+    sprintf (buf, "r%d", regno);
+  else if (REGISTER_NAME (regno)[0] == 's'
+	   && REGISTER_NAME (regno)[1] == 'r')
+    return 0;
+  else
+    sprintf (buf, "%s", REGISTER_NAME (regno));
+
+  return 1;
+}
+
+/* Read the remote registers into the block REGS.  */
+/* Note that the ICE returns register contents as ascii hex strings.  We have
+   to convert that to an unsigned long, and then call store_unsigned_integer to
+   convert it to target byte-order if necessary.  */
+
+static void
+v850ice_fetch_registers (regno)
+     int regno;
+{
+  long retval;
+  char cmd[100];
+  char val[100];
+  struct MessageIO iob;
+  unsigned long regval;
+  char *p;
+
+  if (regno == -1)
+    {
+      for (regno = 0; regno < NUM_REGS; regno++)
+        v850ice_fetch_registers (regno);
+      return;
+    }
+
+  strcpy (cmd, "reg ");
+  if (!convert_register (regno, &cmd[4]))
+    return;
+
+  iob.size = sizeof val;
+  iob.buf = val;
+  retval = ExeAppReq ("GDB", GREADREG, cmd, &iob);
+  if (retval)
+    error ("1: ExeAppReq returned %d: cmd = %s", retval, cmd);
+
+  regval = strtoul (val, NULL, 16);
+  if (regval == 0 && p == val)
+    error ("v850ice_fetch_registers (%d):  bad value from ICE: %s.",
+           regno, val);
+
+  store_unsigned_integer (val, REGISTER_RAW_SIZE (regno), regval);
+  supply_register (regno, val);
+}
+
+/* Store register REGNO, or all registers if REGNO == -1, from the contents
+   of REGISTERS.  */
+
+static void
+v850ice_store_registers (regno)
+     int regno;
+{
+  long retval;
+  char cmd[100];
+  unsigned long regval;
+  char buf[256];
+  struct MessageIO iob;
+  iob.size = 0;
+  iob.buf = buf;
+
+  if (regno == -1)
+    {
+      for (regno = 0; regno < NUM_REGS; regno++)
+	v850ice_store_registers (regno);
+      return;
+    }
+
+  regval = extract_unsigned_integer (&registers[REGISTER_BYTE (regno)],
+                                     REGISTER_RAW_SIZE (regno));
+  strcpy (cmd, "reg ");
+  if (!convert_register (regno, &cmd[4]))
+    return;
+  sprintf (cmd + strlen (cmd), "=0x%x", regval);
+
+  retval = ExeAppReq ("GDB", GWRITEREG, cmd, &iob);
+  if (retval)
+    error ("2: ExeAppReq returned %d: cmd = %s", retval, cmd);
+}
+
+/* Prepare to store registers.  Nothing to do here, since the ICE can write one
+   register at a time.  */
+
+static void 
+v850ice_prepare_to_store ()
+{
+}
+
+/* Read or write LEN bytes from inferior memory at MEMADDR, transferring
+   to or from debugger address MYADDR.  Write to inferior if SHOULD_WRITE is
+   nonzero.  Returns length of data written or read; 0 for error.
+
+   We can only read/write MAX_BLOCK_SIZE bytes at a time, though, or the DLL
+   dies */
+/* ARGSUSED */
+static int
+v850ice_xfer_memory (memaddr, myaddr, len, should_write, target)
+     CORE_ADDR memaddr;
+     char *myaddr;
+     int len;
+     int should_write;
+     struct target_ops *target;			/* ignored */
+{
+  long retval;
+  char cmd[100];
+  struct MessageIO iob;
+  int sent;
+
+  if (should_write)
+    {
+      if (len == 4 || len == 2 || len == 1)
+        {
+          long value = 0;
+          char buf[256];
+          char c;
+
+          iob.size = 0;
+          iob.buf  = buf;
+
+          sent = 0;
+          switch (len)
+            {
+            case 4:
+              c = 'w';
+              value |= (long) ((myaddr[3] << 24) & 0xff000000);
+              value |= (long) ((myaddr[2] << 16) & 0x00ff0000);
+              value |= (long) ((myaddr[1] << 8)  & 0x0000ff00);
+              value |= (long) (myaddr[0] & 0x000000ff);
+	      break;
+            case 2:
+              c = 'h';
+              value |= (long) ((myaddr[1] << 8) & 0xff00);
+              value |= (long) (myaddr[0] & 0x00ff);
+              break;
+            case 1:
+              c = 'b';
+              value |= (long) (myaddr[0] & 0xff);
+              break;
+            }
+
+          sprintf (cmd, "memory %c c 0x%x=0x%x", c, (int) memaddr, value);
+          retval = ExeAppReq ("GDB", GWRITEMEM, cmd, &iob);
+          if (retval == 0)
+            sent = len;
+        }
+      else 
+        {
+          sent = 0;
+          do 
+            {
+              iob.size  = len > MAX_BLOCK_SIZE ? MAX_BLOCK_SIZE : len;
+              iob.buf   = myaddr;
+              sprintf (cmd, "memory b c 0x%x=0x00 l=%d", (int) memaddr, iob.size);
+              retval = ExeAppReq ("GDB", GWRITEBLOCK, cmd, &iob);
+              if (retval != 0)
+                break;
+              len      -= iob.size;
+              memaddr  += iob.size;
+              myaddr   += iob.size;
+              sent     += iob.size;
+            }
+          while (len > 0);
+        }
+    }
+  else
+    {
+      unsigned char *tmp;
+      unsigned char *t;
+      int i;
+      
+      tmp = alloca (len + 100);
+      t = tmp;
+      memset (tmp + len, 0xff, 100);
+
+      sent = 0;
+      do
+        {
+          iob.size = len > MAX_BLOCK_SIZE ? MAX_BLOCK_SIZE : len;
+          iob.buf  = tmp;
+          sprintf (cmd, "memory b 0x%x l=%d", (int)memaddr, iob.size);
+          retval = ExeAppReq ("GDB", GREADBLOCK, cmd, &iob);
+          if (retval != 0)
+            break;
+          len     -= iob.size;
+          memaddr += iob.size;
+          sent    += iob.size;
+          tmp     += iob.size;
+        }
+      while (len > 0);
+
+      if (retval == 0)
+        {
+          for (i = 0; i <  100; i++)
+            {
+              if (t[sent + i] != 0xff)
+                {
+                  warning ("GREADBLOCK trashed bytes after transfer area.");
+                  break;
+                }
+            }
+          memcpy (myaddr, t, sent);
+        }
+    }
+ 
+  if (retval != 0)
+    error ("3: ExeAppReq returned %d: cmd = %s", retval, cmd);
+  
+  return sent;
+}
+
+static void
+v850ice_files_info (ignore)
+     struct target_ops *ignore;
+{
+  puts_filtered ("Debugging a target via the NEC V850 ICE.\n");
+}
+
+static int
+v850ice_insert_breakpoint (addr, contents_cache)
+     CORE_ADDR addr;
+     char *contents_cache;
+{
+  long retval;
+  char cmd[100];
+  char buf[256];
+  struct MessageIO iob;
+
+  iob.size = 0;
+  iob.buf  = buf;
+  sprintf (cmd, "%d, ", addr);
+
+  retval = ExeAppReq ("GDB", GSETBREAK, cmd, &iob);
+  if (retval)
+    error ("ExeAppReq (GSETBREAK) returned %d: cmd = %s", retval, cmd);
+
+  return 0;
+}
+
+static int
+v850ice_remove_breakpoint (addr, contents_cache)
+     CORE_ADDR addr;
+     char *contents_cache;
+{
+  long retval;
+  char cmd[100];
+  char buf[256];
+  struct MessageIO iob;
+
+  iob.size = 0;
+  iob.buf  = buf;
+
+  sprintf (cmd, "%d, ", addr);
+
+  retval = ExeAppReq ("GDB", GREMOVEBREAK, cmd, &iob);
+  if (retval)
+    error ("ExeAppReq (GREMOVEBREAK) returned %d: cmd = %s", retval, cmd);
+
+  return 0;
+}
+
+static void
+v850ice_kill ()
+{
+  target_mourn_inferior ();
+  inferior_pid = 0;
+}
+
+static void
+v850ice_mourn ()
+{
+}
+
+static void
+v850ice_load (filename, from_tty)
+  char * filename; 
+  int from_tty;
+{
+  struct MessageIO iob;
+  char buf[256];
+
+  iob.size = 0;
+  iob.buf  = buf;
+  generic_load(filename, from_tty);
+  ExeAppReq ("GDB", GDOWNLOAD, filename, &iob);
+}
+
+static int
+ice_file (arg)
+     char *arg;
+{
+  char *s;
+  
+  target_detach (NULL, 0);
+  pop_target ();
+
+  printf_unfiltered ("\n");
+
+  s = arg;
+  while (*s != '\0')
+    {
+      if (*s == '\\')
+        *s = '/';
+      s++;
+    }
+
+  /* Safegaurd against confusing the breakpoint routines... */
+  delete_command(NULL, 0);
+
+  /* Must supress from_tty, otherwise we could start asking if the
+     user really wants to load a new symbol table, etc... */
+  printf_unfiltered ("Reading symbols from %s...", arg);
+  exec_file_command (arg, 0);
+  symbol_file_command (arg, 0);
+  printf_unfiltered ("done\n");
+
+  /* exec_file_command will kill our target, so reinstall the ICE as
+     the target. */
+  v850ice_open (NULL, 0);
+
+  togdb_force_update ();
+  return 1;
+}
+
+static int
+ice_cont (c)
+  char *c;
+{
+  printf_filtered ("continue (ice)\n");
+  ReplyMessage ((LRESULT) 1);
+
+      continue_command (NULL, 1);
+
+  return 1;
+}
+
+static void
+do_gdb (cmd, str, func, count)
+     char *cmd;
+     char *str;
+     void (*func) PARAMS ((char *, int));
+     int count;
+{
+  ReplyMessage ((LRESULT) 1);
+
+  while (count--)
+    {
+      printf_unfiltered (str);
+
+	  func (NULL, 0);
+    }
+}
+
+
+static int
+ice_stepi (c)
+  char *c;
+{
+  int count = (int) c;
+
+  do_gdb ("gdb_immediate stepi", "stepi (ice)\n", stepi_command, count);
+  return 1;
+}
+
+static int
+ice_nexti (c)
+  char *c;
+{
+  int count = (int) c;
+
+  do_gdb ("gdb_immediate nexti", "nexti (ice)\n", nexti_command, count);
+  return 1;
+}
+
+static void
+v850ice_command (arg, from_tty)
+  char *arg;
+  int   from_tty;
+{
+  struct MessageIO iob;
+  char buf[256];
+
+  iob.buf = buf;
+  iob.size = 0;
+  ExeAppReq ("GDB", GCOMMAND, arg, &iob);
+}
+
+static void
+togdb_force_update (void)
+{
+}
+
+
+/* Define the target subroutine names */
+
+static void 
+init_850ice_ops(void)
+{
+  v850ice_ops.to_shortname   =   "ice";		
+  v850ice_ops.to_longname    =   "NEC V850 ICE interface";
+  v850ice_ops.to_doc         =   "Debug a system controlled by a NEC 850 ICE.";
+  v850ice_ops.to_open        =   v850ice_open;		
+  v850ice_ops.to_close       =   v850ice_close;	
+  v850ice_ops.to_attach      =   NULL;
+  v850ice_ops.to_post_attach =   NULL;
+  v850ice_ops.to_require_attach = NULL;		
+  v850ice_ops.to_detach      =   v850ice_detach;
+  v850ice_ops.to_require_detach = NULL;	
+  v850ice_ops.to_resume      =   v850ice_resume;	
+  v850ice_ops.to_wait        =   v850ice_wait;
+  v850ice_ops.to_post_wait = NULL;	
+  v850ice_ops.to_fetch_registers  =   v850ice_fetch_registers;
+  v850ice_ops.to_store_registers  =   v850ice_store_registers;
+  v850ice_ops.to_prepare_to_store =   v850ice_prepare_to_store;
+  v850ice_ops.to_xfer_memory =   v850ice_xfer_memory;	
+  v850ice_ops.to_files_info  =   v850ice_files_info;	
+  v850ice_ops.to_insert_breakpoint =   v850ice_insert_breakpoint;
+  v850ice_ops.to_remove_breakpoint =   v850ice_remove_breakpoint;
+  v850ice_ops.to_terminal_init    =   NULL;		
+  v850ice_ops.to_terminal_inferior =   NULL;		
+  v850ice_ops.to_terminal_ours_for_output =   NULL;	
+  v850ice_ops.to_terminal_ours   =   NULL;		
+  v850ice_ops.to_terminal_info   =   NULL;		
+  v850ice_ops.to_kill            =   v850ice_kill;		
+  v850ice_ops.to_load            =   v850ice_load;		
+  v850ice_ops.to_lookup_symbol   =   NULL;		
+  v850ice_ops.to_create_inferior =   NULL;
+  v850ice_ops.to_mourn_inferior  =   v850ice_mourn;
+  v850ice_ops.to_can_run         =   0;		
+  v850ice_ops.to_notice_signals  =   0;		
+  v850ice_ops.to_thread_alive    =    NULL;	
+  v850ice_ops.to_stop            =   v850ice_stop;
+  v850ice_ops.to_pid_to_exec_file = NULL;
+  v850ice_ops.to_core_file_to_sym_file = NULL;			
+  v850ice_ops.to_stratum         =   process_stratum;	
+  v850ice_ops.DONT_USE           =   NULL;		
+  v850ice_ops.to_has_all_memory  =   1;		
+  v850ice_ops.to_has_memory      =   1;		
+  v850ice_ops.to_has_stack       =   1;		
+  v850ice_ops.to_has_registers   =   1;		
+  v850ice_ops.to_has_execution   =   1;		
+  v850ice_ops.to_sections        =   NULL;		
+  v850ice_ops.to_sections_end    =   NULL;		
+  v850ice_ops.to_magic           =   OPS_MAGIC	;
+}
+
+void
+_initialize_v850ice ()
+{
+  init_850ice_ops ();
+  add_target (&v850ice_ops);
+
+  add_com ("ice", class_obscure, v850ice_command,
+           "Send command to ICE");
+}