Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 1264 insertions, 0 deletions

diff --git a/gdb/remote-os9k.c b/gdb/remote-os9k.c
new file mode 100644
index 0000000..2abfa83
--- /dev/null
+++ b/gdb/remote-os9k.c
@@ -0,0 +1,1264 @@
+/* Remote debugging interface for boot monitors, for GDB.
+   Copyright 1990, 1991, 1992, 1993 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.  */
+
+/* This file was derived from remote-eb.c, which did a similar job, but for
+   an AMD-29K running EBMON.  That file was in turn derived from remote.c
+   as mentioned in the following comment (left in for comic relief):
+
+  "This is like remote.c but is for a different situation--
+   having a PC running os9000 hook up with a unix machine with
+   a serial line, and running ctty com2 on the PC. os9000 has a debug
+   monitor called ROMBUG running.  Not to mention that the PC
+   has PC/NFS, so it can access the same executables that gdb can,
+   over the net in real time."
+
+   In reality, this module talks to a debug monitor called 'ROMBUG', which
+   We communicate with ROMBUG via a direct serial line, the network version
+   of ROMBUG is not available yet.
+*/
+
+/* FIXME This file needs to be rewritten if it's to work again, either
+   to self-contained or to use the new monitor interface.  */
+
+#include "defs.h"
+#include "gdbcore.h"
+#include "target.h"
+#include "wait.h"
+#ifdef ANSI_PROTOTYPES
+#include <stdarg.h>
+#else
+#include <varargs.h>
+#endif
+#include <signal.h>
+#include "gdb_string.h"
+#include <sys/types.h>
+#include "command.h"
+#include "serial.h"
+#include "monitor.h"
+#include "remote-utils.h"
+#include "symtab.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "gdb-stabs.h"
+
+struct cmd_list_element *showlist;
+extern struct target_ops rombug_ops;		/* Forward declaration */
+extern struct monitor_ops rombug_cmds;		/* Forward declaration */
+extern struct cmd_list_element *setlist;
+extern struct cmd_list_element *unsetlist;
+extern int attach_flag;
+
+static void rombug_close();
+static void rombug_fetch_register();
+static void rombug_fetch_registers();
+static void rombug_store_register();
+#if 0
+static int sr_get_debug();			/* flag set by "set remotedebug" */
+#endif
+static int hashmark;				/* flag set by "set hash" */
+static int rombug_is_open = 0;
+
+/* FIXME: Replace with sr_get_debug ().  */
+#define LOG_FILE "monitor.log"
+FILE *log_file;
+static int monitor_log = 0;
+static int tty_xon = 0;
+static int tty_xoff = 0;
+
+static int timeout = 10;
+static int is_trace_mode = 0;
+/* Descriptor for I/O to remote machine.  Initialize it to NULL*/
+static serial_t monitor_desc = NULL;
+
+static CORE_ADDR bufaddr = 0;
+static int buflen = 0;
+static char readbuf[16];
+
+/* Send data to monitor.  Works just like printf. */
+static void
+#ifdef ANSI_PROTOTYPES
+printf_monitor(char *pattern, ...)
+#else
+printf_monitor(va_alist)
+     va_dcl
+#endif
+{
+  va_list args;
+  char buf[200];
+  int i;
+
+#ifdef ANSI_PROTOTYPES
+  va_start (args, pattern);
+#else
+  char *pattern;
+  va_start(args);
+  pattern = va_arg(args, char *);
+#endif
+
+  vsprintf(buf, pattern, args);
+  va_end(args);
+
+  if (SERIAL_WRITE(monitor_desc, buf, strlen(buf)))
+    fprintf(stderr, "SERIAL_WRITE failed: %s\n", safe_strerror(errno));
+}
+
+/* Read a character from the remote system, doing all the fancy timeout stuff*/
+static int
+readchar(timeout)
+     int timeout;
+{
+  int c;
+
+  c = SERIAL_READCHAR(monitor_desc, timeout);
+
+  if (sr_get_debug())
+    putchar(c & 0x7f);
+
+  if (monitor_log && isascii(c))
+    putc(c & 0x7f, log_file);
+
+  if (c >= 0)
+    return c & 0x7f;
+
+  if (c == SERIAL_TIMEOUT)
+    {
+      if (timeout == 0)
+	return c;		/* Polls shouldn't generate timeout errors */
+
+      error("Timeout reading from remote system.");
+    }
+
+  perror_with_name("remote-monitor");
+}
+
+/* Scan input from the remote system, until STRING is found.  If DISCARD is
+   non-zero, then discard non-matching input, else print it out.
+   Let the user break out immediately.  */
+static void
+expect(string, discard)
+     char *string;
+     int discard;
+{
+  char *p = string;
+  int c;
+
+  if (sr_get_debug())
+    printf ("Expecting \"%s\"\n", string);
+
+  immediate_quit = 1;
+  while (1)
+    {
+      c = readchar(timeout);
+      if (!isascii (c))
+	continue;
+      if (c == *p++)
+	{
+	  if (*p == '\0')
+	    {
+	      immediate_quit = 0;
+	      if (sr_get_debug())
+		printf ("\nMatched\n");
+	      return;
+	    }
+	}
+      else
+	{
+	  if (!discard)
+	    {
+	      fwrite(string, 1, (p - 1) - string, stdout);
+	      putchar((char)c);
+	      fflush(stdout);
+	    }
+	  p = string;
+	}
+    }
+}
+
+/* Keep discarding input until we see the ROMBUG prompt.
+
+   The convention for dealing with the prompt is that you
+   o give your command
+   o *then* wait for the prompt.
+
+   Thus the last thing that a procedure does with the serial line
+   will be an expect_prompt().  Exception:  rombug_resume does not
+   wait for the prompt, because the terminal is being handed over
+   to the inferior.  However, the next thing which happens after that
+   is a rombug_wait which does wait for the prompt.
+   Note that this includes abnormal exit, e.g. error().  This is
+   necessary to prevent getting into states from which we can't
+   recover.  */
+static void
+expect_prompt(discard)
+     int discard;
+{
+  if (monitor_log)
+  /* This is a convenient place to do this.  The idea is to do it often
+     enough that we never lose much data if we terminate abnormally.  */
+    fflush(log_file);
+
+  if (is_trace_mode) {
+    expect("trace", discard);
+  } else {
+    expect (PROMPT, discard);
+  }
+}
+
+/* Get a hex digit from the remote system & return its value.
+   If ignore_space is nonzero, ignore spaces (not newline, tab, etc).  */
+static int
+get_hex_digit(ignore_space)
+     int ignore_space;
+{
+  int ch;
+  while (1)
+    {
+      ch = readchar(timeout);
+      if (ch >= '0' && ch <= '9')
+	return ch - '0';
+      else if (ch >= 'A' && ch <= 'F')
+	return ch - 'A' + 10;
+      else if (ch >= 'a' && ch <= 'f')
+	return ch - 'a' + 10;
+      else if (ch == ' ' && ignore_space)
+	;
+      else
+	{
+	  expect_prompt(1);
+	  error("Invalid hex digit from remote system.");
+	}
+    }
+}
+
+/* Get a byte from monitor and put it in *BYT.  Accept any number
+   leading spaces.  */
+static void
+get_hex_byte (byt)
+     char *byt;
+{
+  int val;
+
+  val = get_hex_digit (1) << 4;
+  val |= get_hex_digit (0);
+  *byt = val;
+}
+
+/* Get N 32-bit words from remote, each preceded by a space,
+   and put them in registers starting at REGNO.  */
+static void
+get_hex_regs (n, regno)
+     int n;
+     int regno;
+{
+  long val;
+  int i;
+  unsigned char b;
+
+  for (i = 0; i < n; i++)
+    {
+      int j;
+      
+      val = 0;
+      for (j = 0; j < 4; j++)
+	{
+	  get_hex_byte (&b);
+	  if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+	    val = (val << 8) + b;
+	  else
+	    val = val + (b << (j*8));
+	}
+      supply_register (regno++, (char *) &val);
+    }
+}
+
+/* This is called not only when we first attach, but also when the
+   user types "run" after having attached.  */
+static void
+rombug_create_inferior (execfile, args, env)
+     char *execfile;
+     char *args;
+     char **env;
+{
+  int entry_pt;
+
+  if (args && *args)
+    error("Can't pass arguments to remote ROMBUG process");
+
+  if (execfile == 0 || exec_bfd == 0)
+    error("No executable file specified");
+
+  entry_pt = (int) bfd_get_start_address (exec_bfd);
+
+  if (monitor_log)
+    fputs ("\nIn Create_inferior()", log_file);
+
+
+/* The "process" (board) is already stopped awaiting our commands, and
+   the program is already downloaded.  We just set its PC and go.  */
+
+  init_wait_for_inferior ();
+  proceed ((CORE_ADDR)entry_pt, TARGET_SIGNAL_DEFAULT, 0);
+}
+
+/* Open a connection to a remote debugger.
+   NAME is the filename used for communication.  */
+
+static char dev_name[100];
+
+static void
+rombug_open(args, from_tty)
+     char *args;
+     int from_tty;
+{
+  if (args == NULL)
+    error ("Use `target RomBug DEVICE-NAME' to use a serial port, or \n\
+`target RomBug HOST-NAME:PORT-NUMBER' to use a network connection.");
+
+  target_preopen(from_tty);
+
+  if (rombug_is_open)
+    unpush_target(&rombug_ops);
+
+  strcpy(dev_name, args);
+  monitor_desc = SERIAL_OPEN(dev_name);
+  if (monitor_desc == NULL)
+    perror_with_name(dev_name);
+
+  /* if baud rate is set by 'set remotebaud' */
+  if (SERIAL_SETBAUDRATE (monitor_desc, sr_get_baud_rate()))
+    {
+      SERIAL_CLOSE (monitor_desc);
+      perror_with_name ("RomBug");
+    }
+  SERIAL_RAW(monitor_desc);
+  if (tty_xon || tty_xoff)
+    {
+    struct hardware_ttystate { struct termios t;} *tty_s;
+
+      tty_s =(struct hardware_ttystate  *)SERIAL_GET_TTY_STATE(monitor_desc);
+      if (tty_xon) tty_s->t.c_iflag |= IXON; 
+      if (tty_xoff) tty_s->t.c_iflag |= IXOFF;
+      SERIAL_SET_TTY_STATE(monitor_desc, (serial_ttystate) tty_s);
+    }
+
+  rombug_is_open = 1;
+
+  log_file = fopen (LOG_FILE, "w");
+  if (log_file == NULL)
+    perror_with_name (LOG_FILE);
+
+  push_monitor (&rombug_cmds);
+  printf_monitor("\r");	/* CR wakes up monitor */
+  expect_prompt(1);
+  push_target (&rombug_ops);
+  attach_flag = 1;
+
+  if (from_tty)
+    printf("Remote %s connected to %s\n", target_shortname,
+	   dev_name);
+
+  rombug_fetch_registers();
+
+  printf_monitor ("ov e \r");
+  expect_prompt(1);
+  bufaddr = 0;
+  buflen = 0;
+}
+
+/*
+ * Close out all files and local state before this target loses control.
+ */
+
+static void
+rombug_close (quitting)
+     int quitting;
+{
+  if (rombug_is_open) {
+    SERIAL_CLOSE(monitor_desc);
+    monitor_desc = NULL;
+    rombug_is_open = 0;
+  }
+
+  if (log_file) {
+    if (ferror(log_file))
+      fprintf(stderr, "Error writing log file.\n");
+    if (fclose(log_file) != 0)
+      fprintf(stderr, "Error closing log file.\n");
+    log_file = 0;
+  }
+}
+
+int
+rombug_link(mod_name, text_reloc)
+     char *mod_name;
+     CORE_ADDR *text_reloc;
+{
+  int i, j;
+  unsigned long val;
+  unsigned char b;
+
+  printf_monitor("l %s \r", mod_name); 
+  expect_prompt(1);
+  printf_monitor(".r \r");
+  expect(REG_DELIM, 1);
+  for (i=0; i <= 7; i++)
+    {
+      val = 0;
+      for (j = 0; j < 4; j++)
+        {
+          get_hex_byte(&b);
+          val = (val << 8) + b;
+	}
+    }
+  expect_prompt(1);
+  *text_reloc = val;
+  return 1;
+}
+
+/* Terminate the open connection to the remote debugger.
+   Use this when you want to detach and do something else
+   with your gdb.  */
+static void
+rombug_detach (from_tty)
+     int from_tty;
+{
+  if (attach_flag) {
+    printf_monitor (GO_CMD);
+    attach_flag = 0;
+  }
+  pop_target();		/* calls rombug_close to do the real work */
+  if (from_tty)
+    printf ("Ending remote %s debugging\n", target_shortname);
+}
+ 
+/*
+ * Tell the remote machine to resume.
+ */
+static void
+rombug_resume (pid, step, sig)
+     int pid, step;
+     enum target_signal sig;
+{
+  if (monitor_log)
+    fprintf (log_file, "\nIn Resume (step=%d, sig=%d)\n", step, sig);
+
+  if (step)
+    {
+      is_trace_mode = 1;
+      printf_monitor (STEP_CMD);
+      /* wait for the echo.  **
+      expect (STEP_CMD, 1);
+      */
+    }
+  else
+    {
+      printf_monitor (GO_CMD);
+      /* swallow the echo.  **
+      expect (GO_CMD, 1);
+      */
+    }
+  bufaddr = 0;
+  buflen= 0;
+}
+
+/*
+ * Wait until the remote machine stops, then return,
+ * storing status in status just as `wait' would.
+ */
+
+static int
+rombug_wait (pid, status)
+     int pid;
+     struct target_waitstatus *status;
+{
+  int old_timeout = timeout;
+  struct section_offsets *offs;
+  CORE_ADDR addr, pc;
+  struct obj_section *obj_sec;
+
+  if (monitor_log)
+    fputs ("\nIn wait ()", log_file);
+
+  status->kind = TARGET_WAITKIND_EXITED;
+  status->value.integer = 0;
+
+  timeout = -1;		/* Don't time out -- user program is running. */
+  expect ("eax:", 0);   /* output any message before register display */
+  expect_prompt(1);     /* Wait for prompt, outputting extraneous text */
+
+  status->kind = TARGET_WAITKIND_STOPPED;
+  status->value.sig = TARGET_SIGNAL_TRAP;
+  timeout = old_timeout;
+  rombug_fetch_registers();
+  bufaddr = 0;
+  buflen = 0;
+  pc = read_register(PC_REGNUM);
+  addr = read_register(DATABASE_REG);
+  obj_sec = find_pc_section (pc);
+  if (obj_sec != NULL)
+    {
+      if (obj_sec->objfile != symfile_objfile)
+        new_symfile_objfile(obj_sec->objfile, 1, 0);
+      offs = ((struct section_offsets *)
+	 alloca (sizeof (struct section_offsets)
+	 + (symfile_objfile->num_sections * sizeof (offs->offsets))));
+      memcpy (offs, symfile_objfile->section_offsets,
+         (sizeof (struct section_offsets) + 
+	 (symfile_objfile->num_sections * sizeof (offs->offsets))));
+      ANOFFSET (offs, SECT_OFF_DATA) = addr;
+      ANOFFSET (offs, SECT_OFF_BSS) = addr;
+
+      objfile_relocate(symfile_objfile, offs);
+    }
+
+  return 0;
+}
+
+/* Return the name of register number regno in the form input and output by
+   monitor.  Currently, register_names just happens to contain exactly what
+   monitor wants.  Lets take advantage of that just as long as possible! */
+
+static char *
+get_reg_name (regno)
+     int regno;
+{
+  static char buf[50];
+  char *p;
+  char *b;
+
+  b = buf;
+
+  if (regno < 0)
+    return ("");
+/*
+  for (p = REGISTER_NAME (regno); *p; p++)
+    *b++ = toupper(*p);
+  *b = '\000';
+*/
+  p = (char *)REGISTER_NAME (regno);
+  return p;
+/*
+  return buf;
+*/
+}
+
+/* read the remote registers into the block regs.  */
+
+static void
+rombug_fetch_registers ()
+{
+  int regno, j, i;
+  long val;
+  unsigned char b;
+
+  printf_monitor (GET_REG);
+  expect("eax:", 1);
+  expect("\n", 1);
+  get_hex_regs(1, 0);
+  get_hex_regs(1, 3);
+  get_hex_regs(1, 1);
+  get_hex_regs(1, 2);
+  get_hex_regs(1, 6);
+  get_hex_regs(1, 7);
+  get_hex_regs(1, 5);
+  get_hex_regs(1, 4);
+  for (regno = 8; regno <= 15; regno++)
+    {
+      expect(REG_DELIM, 1);
+      if (regno >= 8 && regno <= 13)
+	{
+	  val = 0;
+	  for (j = 0; j < 2; j++)
+            {
+              get_hex_byte (&b);
+	      if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+		val = (val << 8) + b;
+	      else
+		val = val + (b << (j*8));
+            }
+
+	  if (regno == 8) i = 10;
+	  if (regno >=  9 && regno <= 12) i = regno + 3;
+	  if (regno == 13) i = 11;
+	  supply_register (i, (char *) &val);
+	}
+      else if (regno == 14)
+	{
+	  get_hex_regs(1, PC_REGNUM);
+	}
+      else if (regno == 15)
+	{
+	  get_hex_regs(1, 9);
+	}
+      else
+	{
+	  val = 0;
+	  supply_register(regno, (char *) &val);
+	}
+    }
+  is_trace_mode = 0;
+  expect_prompt (1);
+}
+
+/* Fetch register REGNO, or all registers if REGNO is -1.
+   Returns errno value.  */
+static void
+rombug_fetch_register (regno)
+     int regno;
+{
+  int val, j;
+  unsigned char b;
+
+  if (monitor_log) {
+    fprintf (log_file, "\nIn Fetch Register (reg=%s)\n", get_reg_name (regno));
+    fflush (log_file);
+  }
+
+  if (regno < 0)
+    {
+      rombug_fetch_registers ();
+    }
+  else
+    {
+      char *name = get_reg_name (regno);
+      printf_monitor (GET_REG);
+      if (regno >= 10 && regno <= 15)
+	{
+	  expect ("\n", 1);
+	  expect ("\n", 1);
+          expect (name, 1);
+          expect (REG_DELIM, 1);
+	  val = 0;
+	  for (j = 0; j < 2; j++)
+            {
+              get_hex_byte (&b);
+	      if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+		val = (val << 8) + b;
+	      else
+		val = val + (b << (j*8));
+            }
+	  supply_register (regno, (char *) &val);
+	}
+      else if (regno == 8 || regno == 9)
+	{
+	  expect ("\n", 1);
+	  expect ("\n", 1);
+	  expect ("\n", 1);
+          expect (name, 1);
+          expect (REG_DELIM, 1);
+	  get_hex_regs (1, regno);
+	}
+      else
+	{
+          expect (name, 1);
+          expect (REG_DELIM, 1);
+	  expect("\n", 1);
+	  get_hex_regs(1, 0);
+	  get_hex_regs(1, 3);
+	  get_hex_regs(1, 1);
+	  get_hex_regs(1, 2);
+	  get_hex_regs(1, 6);
+	  get_hex_regs(1, 7);
+	  get_hex_regs(1, 5);
+	  get_hex_regs(1, 4);
+	}
+      expect_prompt (1);
+    }
+  return;
+}
+
+/* Store the remote registers from the contents of the block REGS.  */
+
+static void
+rombug_store_registers ()
+{
+  int regno;
+
+  for (regno = 0; regno <= PC_REGNUM; regno++)
+    rombug_store_register(regno);
+
+  registers_changed ();
+}
+
+/* Store register REGNO, or all if REGNO == 0.
+   return errno value.  */
+static void
+rombug_store_register (regno)
+     int regno;
+{
+char *name;
+
+  if (monitor_log)
+    fprintf (log_file, "\nIn Store_register (regno=%d)\n", regno);
+
+  if (regno == -1)
+    rombug_store_registers ();
+  else
+    {
+      if (sr_get_debug())
+	printf ("Setting register %s to 0x%x\n", get_reg_name (regno), read_register (regno));
+
+      name = get_reg_name(regno);
+      if (name == 0) return;
+      printf_monitor (SET_REG, name, read_register (regno));
+
+      is_trace_mode = 0;
+      expect_prompt (1);
+    }
+}
+
+/* Get ready to modify the registers array.  On machines which store
+   individual registers, this doesn't need to do anything.  On machines
+   which store all the registers in one fell swoop, this makes sure
+   that registers contains all the registers from the program being
+   debugged.  */
+
+static void
+rombug_prepare_to_store ()
+{
+  /* Do nothing, since we can store individual regs */
+}
+
+static void
+rombug_files_info ()
+{
+  printf ("\tAttached to %s at %d baud.\n",
+	  dev_name, sr_get_baud_rate());
+}
+
+/* Copy LEN bytes of data from debugger memory at MYADDR
+   to inferior's memory at MEMADDR.  Returns length moved.  */
+static int
+rombug_write_inferior_memory (memaddr, myaddr, len)
+     CORE_ADDR memaddr;
+     unsigned char *myaddr;
+     int len;
+{
+  int i;
+  char buf[10];
+
+  if (monitor_log)
+    fprintf (log_file, "\nIn Write_inferior_memory (memaddr=%x, len=%d)\n", memaddr, len);
+
+  printf_monitor (MEM_SET_CMD, memaddr);
+  for (i = 0; i < len; i++)
+    {
+      expect (CMD_DELIM, 1);
+      printf_monitor ("%x \r", myaddr[i]);
+      if (sr_get_debug())
+	printf ("\nSet 0x%x to 0x%x\n", memaddr + i, myaddr[i]);
+    }
+  expect (CMD_DELIM, 1);
+  if (CMD_END)
+    printf_monitor (CMD_END);
+  is_trace_mode = 0;
+  expect_prompt (1);
+
+  bufaddr = 0;
+  buflen = 0;
+  return len;
+}
+
+/* Read LEN bytes from inferior memory at MEMADDR.  Put the result
+   at debugger address MYADDR.  Returns length moved.  */
+static int
+rombug_read_inferior_memory(memaddr, myaddr, len)
+     CORE_ADDR memaddr;
+     char *myaddr;
+     int len;
+{
+  int i, j;
+
+  /* Number of bytes read so far.  */
+  int count;
+
+  /* Starting address of this pass.  */
+  unsigned long startaddr;
+
+  /* Number of bytes to read in this pass.  */
+  int len_this_pass;
+
+  if (monitor_log)
+    fprintf (log_file, "\nIn Read_inferior_memory (memaddr=%x, len=%d)\n", memaddr, len);
+
+  /* Note that this code works correctly if startaddr is just less
+     than UINT_MAX (well, really CORE_ADDR_MAX if there was such a
+     thing).  That is, something like
+     rombug_read_bytes (CORE_ADDR_MAX - 4, foo, 4)
+     works--it never adds len To memaddr and gets 0.  */
+  /* However, something like
+     rombug_read_bytes (CORE_ADDR_MAX - 3, foo, 4)
+     doesn't need to work.  Detect it and give up if there's an attempt
+     to do that.  */
+  if (((memaddr - 1) + len) < memaddr) {
+    errno = EIO;
+    return 0;
+  }
+  if (bufaddr <= memaddr && (memaddr+len) <= (bufaddr+buflen))
+    {
+      memcpy(myaddr, &readbuf[memaddr-bufaddr], len);
+      return len;
+    }
+  
+  startaddr = memaddr;
+  count = 0;
+  while (count < len)
+    {
+      len_this_pass = 16;
+      if ((startaddr % 16) != 0)
+	len_this_pass -= startaddr % 16;
+      if (len_this_pass > (len - count))
+	len_this_pass = (len - count);
+      if (sr_get_debug())
+	printf ("\nDisplay %d bytes at %x\n", len_this_pass, startaddr);
+
+      printf_monitor (MEM_DIS_CMD, startaddr, 8);
+      expect ("- ", 1);
+      for (i = 0; i < 16; i++)
+	{
+	  get_hex_byte (&readbuf[i]);
+	}
+      bufaddr = startaddr;
+      buflen = 16;
+      memcpy(&myaddr[count], readbuf, len_this_pass); 
+      count += len_this_pass;
+      startaddr += len_this_pass;
+      expect(CMD_DELIM, 1);
+    }
+  if (CMD_END) 
+      printf_monitor (CMD_END);
+  is_trace_mode = 0;
+  expect_prompt (1);
+
+  return len;
+}
+
+/* FIXME-someday!  merge these two.  */
+static int
+rombug_xfer_inferior_memory (memaddr, myaddr, len, write, target)
+     CORE_ADDR memaddr;
+     char *myaddr;
+     int len;
+     int write;
+     struct target_ops *target;		/* ignored */
+{
+  if (write)
+    return rombug_write_inferior_memory (memaddr, myaddr, len);
+  else
+    return rombug_read_inferior_memory (memaddr, myaddr, len);
+}
+
+static void
+rombug_kill (args, from_tty)
+     char *args;
+     int from_tty;
+{
+  return;		/* ignore attempts to kill target system */
+}
+
+/* Clean up when a program exits.
+   The program actually lives on in the remote processor's RAM, and may be
+   run again without a download.  Don't leave it full of breakpoint
+   instructions.  */
+
+static void
+rombug_mourn_inferior ()
+{
+  remove_breakpoints ();
+  generic_mourn_inferior ();	/* Do all the proper things now */
+}
+
+#define MAX_MONITOR_BREAKPOINTS 16
+
+static CORE_ADDR breakaddr[MAX_MONITOR_BREAKPOINTS] = {0};
+
+static int
+rombug_insert_breakpoint (addr, shadow)
+     CORE_ADDR addr;
+     char *shadow;
+{
+  int i;
+  CORE_ADDR bp_addr = addr;
+  int bp_size = 0;
+
+  if (monitor_log)
+    fprintf (log_file, "\nIn Insert_breakpoint (addr=%x)\n", addr);
+  BREAKPOINT_FROM_PC (&bp_addr, &bp_size);
+
+  for (i = 0; i <= MAX_MONITOR_BREAKPOINTS; i++)
+    if (breakaddr[i] == 0)
+      {
+	breakaddr[i] = addr;
+	if (sr_get_debug())
+	  printf ("Breakpoint at %x\n", addr);
+	rombug_read_inferior_memory (bp_addr, shadow, bp_size);
+	printf_monitor(SET_BREAK_CMD, addr);
+	is_trace_mode = 0;
+	expect_prompt(1);
+	return 0;
+      }
+
+  fprintf(stderr, "Too many breakpoints (> 16) for monitor\n");
+  return 1;
+}
+
+/*
+ * _remove_breakpoint -- Tell the monitor to remove a breakpoint
+ */
+static int
+rombug_remove_breakpoint (addr, shadow)
+     CORE_ADDR addr;
+     char *shadow;
+{
+  int i;
+
+  if (monitor_log)
+    fprintf (log_file, "\nIn Remove_breakpoint (addr=%x)\n", addr);
+
+  for (i = 0; i < MAX_MONITOR_BREAKPOINTS; i++)
+    if (breakaddr[i] == addr)
+      {
+	breakaddr[i] = 0;
+	printf_monitor(CLR_BREAK_CMD, addr);
+	is_trace_mode = 0;
+	expect_prompt(1);
+	return 0;
+      }
+
+  fprintf(stderr, "Can't find breakpoint associated with 0x%x\n", addr);
+  return 1;
+}
+
+/* Load a file. This is usually an srecord, which is ascii. No 
+   protocol, just sent line by line. */
+
+#define DOWNLOAD_LINE_SIZE 100
+static void
+rombug_load (arg)
+    char	*arg;
+{
+/* this part comment out for os9* */
+#if 0
+  FILE *download;
+  char buf[DOWNLOAD_LINE_SIZE];
+  int i, bytes_read;
+
+  if (sr_get_debug())
+    printf ("Loading %s to monitor\n", arg);
+
+  download = fopen (arg, "r");
+  if (download == NULL)
+    {
+    error (sprintf (buf, "%s Does not exist", arg));
+    return;
+  }
+
+  printf_monitor (LOAD_CMD);
+/*  expect ("Waiting for S-records from host... ", 1); */
+
+  while (!feof (download))
+    {
+      bytes_read = fread (buf, sizeof (char), DOWNLOAD_LINE_SIZE, download);
+      if (hashmark)
+	{
+	  putchar ('.');
+	  fflush (stdout);
+	}
+
+      if (SERIAL_WRITE(monitor_desc, buf, bytes_read)) {
+	fprintf(stderr, "SERIAL_WRITE failed: (while downloading) %s\n", safe_strerror(errno));
+	break;
+      }
+      i = 0;
+      while (i++ <=200000) {} ;     			/* Ugly HACK, probably needs flow control */
+      if (bytes_read < DOWNLOAD_LINE_SIZE)
+	{
+	  if (!feof (download))
+	    error ("Only read %d bytes\n", bytes_read);
+	  break;
+	}
+    }
+
+  if (hashmark)
+    {
+      putchar ('\n');
+    }
+  if (!feof (download))
+    error ("Never got EOF while downloading");
+  fclose (download);
+#endif 0
+}
+
+/* Put a command string, in args, out to MONITOR.  
+   Output from MONITOR is placed on the users terminal until the prompt 
+   is seen. */
+
+static void
+rombug_command (args, fromtty)
+     char	*args;
+     int	fromtty;
+{
+  if (monitor_desc == NULL)
+    error("monitor target not open.");
+  
+  if (monitor_log)
+    fprintf (log_file, "\nIn command (args=%s)\n", args);
+
+  if (!args)
+    error("Missing command.");
+	
+  printf_monitor("%s\r", args);
+  expect_prompt(0);
+}
+
+#if 0
+/* Connect the user directly to MONITOR.  This command acts just like the
+   'cu' or 'tip' command.  Use <CR>~. or <CR>~^D to break out.  */
+
+static struct ttystate ttystate;
+
+static void
+cleanup_tty()
+{  printf("\r\n[Exiting connect mode]\r\n");
+  /*SERIAL_RESTORE(0, &ttystate);*/
+}
+
+static void
+connect_command (args, fromtty)
+     char	*args;
+     int	fromtty;
+{
+  fd_set readfds;
+  int numfds;
+  int c;
+  char cur_esc = 0;
+
+  dont_repeat();
+
+  if (monitor_desc == NULL)
+    error("monitor target not open.");
+  
+  if (args)
+    fprintf("This command takes no args.  They have been ignored.\n");
+	
+  printf("[Entering connect mode.  Use ~. or ~^D to escape]\n");
+
+  serial_raw(0, &ttystate);
+
+  make_cleanup(cleanup_tty, 0);
+
+  FD_ZERO(&readfds);
+
+  while (1)
+    {
+      do
+	{
+	  FD_SET(0, &readfds);
+	  FD_SET(monitor_desc, &readfds);
+	  numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0);
+	}
+      while (numfds == 0);
+
+      if (numfds < 0)
+	perror_with_name("select");
+
+      if (FD_ISSET(0, &readfds))
+	{			/* tty input, send to monitor */
+	  c = getchar();
+	  if (c < 0)
+	    perror_with_name("connect");
+
+	  printf_monitor("%c", c);
+	  switch (cur_esc)
+	    {
+	    case 0:
+	      if (c == '\r')
+		cur_esc = c;
+	      break;
+	    case '\r':
+	      if (c == '~')
+		cur_esc = c;
+	      else
+		cur_esc = 0;
+	      break;
+	    case '~':
+	      if (c == '.' || c == '\004')
+		return;
+	      else
+		cur_esc = 0;
+	    }
+	}
+
+      if (FD_ISSET(monitor_desc, &readfds))
+	{
+	  while (1)
+	    {
+	      c = readchar(0);
+	      if (c < 0)
+		break;
+	      putchar(c);
+	    }
+	  fflush(stdout);
+	}
+    }
+}
+#endif
+
+/*
+ * Define the monitor command strings. Since these are passed directly
+ * through to a printf style function, we need can include formatting
+ * strings. We also need a CR or LF on the end.
+ */
+#warning FIXME: monitor interface pattern strings, stale struct decl
+struct monitor_ops rombug_cmds = {
+  "g \r",				/* execute or usually GO command */
+  "g \r",				/* continue command */
+  "t \r",				/* single step */
+  "b %x\r",				/* set a breakpoint */
+  "k %x\r",				/* clear a breakpoint */
+  "c %x\r",				/* set memory to a value */
+  "d %x %d\r",				/* display memory */
+  "$%08X",				/* prompt memory commands use */
+  ".%s %x\r",				/* set a register */
+  ":",					/* delimiter between registers */
+  ". \r",				/* read a register */
+  "mf \r",				/* download command */
+  "RomBug: ",				/* monitor command prompt */
+  ": ",					/* end-of-command delimitor */
+  ".\r"					/* optional command terminator */
+};
+
+struct target_ops rombug_ops ;
+
+static void 
+init_rombug_ops(void)
+{
+  rombug_ops.to_shortname =   "rombug";
+  rombug_ops.to_longname =   "Microware's ROMBUG debug monitor";
+  rombug_ops.to_doc =   "Use a remote computer running the ROMBUG debug monitor.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya).",
+    rombug_ops.to_open =   rombug_open;
+  rombug_ops.to_close =   rombug_close;
+  rombug_ops.to_attach =   0;
+  rombug_ops.to_post_attach = NULL;
+  rombug_ops.to_require_attach = NULL;
+  rombug_ops.to_detach =   rombug_detach;
+  rombug_ops.to_require_detach = NULL;
+  rombug_ops.to_resume =   rombug_resume;
+  rombug_ops.to_wait  =   rombug_wait;
+  rombug_ops.to_post_wait = NULL;
+  rombug_ops.to_fetch_registers  =   rombug_fetch_register;
+  rombug_ops.to_store_registers  =   rombug_store_register;
+  rombug_ops.to_prepare_to_store =   rombug_prepare_to_store;
+  rombug_ops.to_xfer_memory  =   rombug_xfer_inferior_memory;
+  rombug_ops.to_files_info  =   rombug_files_info;
+  rombug_ops.to_insert_breakpoint =   rombug_insert_breakpoint;
+  rombug_ops.to_remove_breakpoint =   rombug_remove_breakpoint;	/* Breakpoints */
+  rombug_ops.to_terminal_init  =   0;
+  rombug_ops.to_terminal_inferior =   0;
+  rombug_ops.to_terminal_ours_for_output =   0;
+  rombug_ops.to_terminal_ours  =   0;
+  rombug_ops.to_terminal_info  =   0;				/* Terminal handling */
+  rombug_ops.to_kill  =   rombug_kill;
+  rombug_ops.to_load  =   rombug_load;			/* load */
+  rombug_ops.to_lookup_symbol =   rombug_link;				/* lookup_symbol */
+  rombug_ops.to_create_inferior =   rombug_create_inferior;
+  rombug_ops.to_post_startup_inferior = NULL;
+  rombug_ops.to_acknowledge_created_inferior = NULL;
+  rombug_ops.to_clone_and_follow_inferior = NULL;
+  rombug_ops.to_post_follow_inferior_by_clone = NULL;
+  rombug_ops.to_insert_fork_catchpoint = NULL;
+  rombug_ops.to_remove_fork_catchpoint = NULL;
+  rombug_ops.to_insert_vfork_catchpoint = NULL;
+  rombug_ops.to_remove_vfork_catchpoint = NULL;
+  rombug_ops.to_has_forked = NULL;
+  rombug_ops.to_has_vforked = NULL;
+  rombug_ops.to_can_follow_vfork_prior_to_exec = NULL;
+  rombug_ops.to_post_follow_vfork = NULL;
+  rombug_ops.to_insert_exec_catchpoint = NULL;
+  rombug_ops.to_remove_exec_catchpoint = NULL;
+  rombug_ops.to_has_execd = NULL;
+  rombug_ops.to_reported_exec_events_per_exec_call = NULL;
+  rombug_ops.to_has_exited = NULL;
+  rombug_ops.to_mourn_inferior =   rombug_mourn_inferior;
+  rombug_ops.to_can_run  =   0;				/* can_run */
+  rombug_ops.to_notice_signals =   0; 				/* notice_signals */
+  rombug_ops.to_thread_alive  =   0;
+  rombug_ops.to_stop  =   0;				/* to_stop */
+  rombug_ops.to_pid_to_exec_file = NULL;
+  rombug_ops.to_core_file_to_sym_file = NULL;
+  rombug_ops.to_stratum =   process_stratum;
+  rombug_ops.DONT_USE =   0;				/* next */
+  rombug_ops.to_has_all_memory =   1;
+  rombug_ops.to_has_memory =   1;
+  rombug_ops.to_has_stack =   1;
+  rombug_ops.to_has_registers =   1;
+  rombug_ops.to_has_execution =   1;				/* has execution */
+  rombug_ops.to_sections =   0;
+  rombug_ops.to_sections_end =   0;				/* Section pointers */
+  rombug_ops.to_magic =   OPS_MAGIC;			/* Always the last thing */
+} 
+
+void
+_initialize_remote_os9k ()
+{
+  init_rombug_ops() ;
+  add_target (&rombug_ops);
+
+  add_show_from_set (
+        add_set_cmd ("hash", no_class, var_boolean, (char *)&hashmark,
+		"Set display of activity while downloading a file.\nWhen enabled, a period \'.\' is displayed.",
+                &setlist),
+	&showlist);
+
+  add_show_from_set (
+        add_set_cmd ("timeout", no_class, var_zinteger,
+                 (char *) &timeout,
+                 "Set timeout in seconds for remote MIPS serial I/O.",
+                 &setlist),
+        &showlist);
+
+  add_show_from_set (
+        add_set_cmd ("remotelog", no_class, var_zinteger,
+                 (char *) &monitor_log,
+                 "Set monitor activity log on(=1) or off(=0).",
+                 &setlist),
+        &showlist);
+
+  add_show_from_set (
+        add_set_cmd ("remotexon", no_class, var_zinteger,
+                 (char *) &tty_xon,
+                 "Set remote tty line XON control",
+                 &setlist),
+        &showlist);
+
+  add_show_from_set (
+        add_set_cmd ("remotexoff", no_class, var_zinteger,
+                 (char *) &tty_xoff,
+                 "Set remote tty line XOFF control",
+                 &setlist),
+        &showlist);
+
+  add_com ("rombug <command>", class_obscure, rombug_command,
+	   "Send a command to the debug monitor."); 
+#if 0
+  add_com ("connect", class_obscure, connect_command,
+   	   "Connect the terminal directly up to a serial based command monitor.\nUse <CR>~. or <CR>~^D to break out.");
+#endif
+}