* Makefile.in (remote-sds.o): Remove.

* remote-sds.c: Delete.

3 files changed, 5 insertions, 1130 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 4d248ab..e0cbfd8 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2007-01-01  Mark Kettenis  <kettenis@gnu.org>
+
+	* Makefile.in (remote-sds.o): Remove.
+	* remote-sds.c: Delete.
+
 2006-12-31  Daniel Jacobowitz  <dan@codesourcery.com>
 
 	* linux-nat.c (lin_lwp_attach_lwp): Return a status.  Do not
diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 5ba102d..ead6f31 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -2532,10 +2532,6 @@ remote-mips.o: remote-mips.c $(defs_h) $(inferior_h) $(bfd_h) $(symfile_h) \
 	$(gdbcmd_h) $(gdbcore_h) $(serial_h) $(target_h) $(exceptions_h) \
 	$(remote_utils_h) $(gdb_string_h) $(gdb_stat_h) $(regcache_h) \
 	$(mips_tdep_h)
-remote-sds.o: remote-sds.c $(defs_h) $(gdb_string_h) $(frame_h) \
-	$(inferior_h) $(exceptions_h) $(bfd_h) $(symfile_h) $(target_h) \
-	$(gdbcmd_h) $(objfiles_h) $(gdb_stabs_h) $(gdbthread_h) $(gdbcore_h) \
-	$(regcache_h) $(serial_h)
 remote-sim.o: remote-sim.c $(defs_h) $(inferior_h) $(value_h) \
 	$(gdb_string_h) $(terminal_h) $(target_h) $(gdbcore_h) \
 	$(gdb_callback_h) $(gdb_remote_sim_h) $(remote_utils_h) $(command_h) \
diff --git a/gdb/remote-sds.c b/gdb/remote-sds.c
deleted file mode 100644
index b788792..0000000
--- a/gdb/remote-sds.c
+++ /dev/null
@@ -1,1126 +0,0 @@
-/* Remote target communications for serial-line targets using SDS' protocol.
-
-   Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2006 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., 51 Franklin Street, Fifth Floor,
-   Boston, MA 02110-1301, USA.  */
-
-/* This interface was written by studying the behavior of the SDS
-   monitor on an ADS 821/860 board, and by consulting the
-   documentation of the monitor that is available on Motorola's web
-   site.  -sts 8/13/97 */
-
-#include "defs.h"
-#include "gdb_string.h"
-#include <fcntl.h>
-#include "frame.h"
-#include "inferior.h"
-#include "exceptions.h"
-#include "bfd.h"
-#include "symfile.h"
-#include "target.h"
-#include "gdbcmd.h"
-#include "objfiles.h"
-#include "gdb-stabs.h"
-#include "gdbthread.h"
-#include "gdbcore.h"
-#include "regcache.h"
-
-#include <signal.h>
-#include "serial.h"
-
-extern void _initialize_remote_sds (void);
-
-/* Declarations of local functions. */
-
-static int sds_write_bytes (CORE_ADDR, char *, int);
-
-static int sds_read_bytes (CORE_ADDR, char *, int);
-
-static void sds_files_info (struct target_ops *ignore);
-
-static int sds_xfer_memory (CORE_ADDR, char *, int, int, 
-			    struct mem_attrib *, struct target_ops *);
-
-static void sds_prepare_to_store (void);
-
-static void sds_fetch_registers (int);
-
-static void sds_resume (ptid_t, int, enum target_signal);
-
-static int sds_start_remote (void *);
-
-static void sds_open (char *, int);
-
-static void sds_close (int);
-
-static void sds_store_registers (int);
-
-static void sds_mourn (void);
-
-static void sds_load (char *, int);
-
-static int getmessage (unsigned char *, int);
-
-static int putmessage (unsigned char *, int);
-
-static int sds_send (unsigned char *, int);
-
-static int readchar (int);
-
-static ptid_t sds_wait (ptid_t, struct target_waitstatus *);
-
-static void sds_kill (void);
-
-static int fromhex (int);
-
-static void sds_detach (char *, int);
-
-static void sds_interrupt (int);
-
-static void sds_interrupt_twice (int);
-
-static void interrupt_query (void);
-
-static int read_frame (char *);
-
-static void init_sds_ops (void);
-
-static void sds_command (char *args, int from_tty);
-
-/* Define the target operations vector. */
-
-static struct target_ops sds_ops;
-
-/* This was 5 seconds, which is a long time to sit and wait.
-   Unless this is going though some terminal server or multiplexer or
-   other form of hairy serial connection, I would think 2 seconds would
-   be plenty.  */
-
-static int sds_timeout = 2;
-
-/* Descriptor for I/O to remote machine.  Initialize it to NULL so
-   that sds_open knows that we don't have a file open when the program
-   starts.  */
-
-static struct serial *sds_desc = NULL;
-
-/* This limit comes from the monitor.  */
-
-#define	PBUFSIZ	250
-
-/* Maximum number of bytes to read/write at once.  The value here
-   is chosen to fill up a packet (the headers account for the 32).  */
-#define MAXBUFBYTES ((PBUFSIZ-32)/2)
-
-static int next_msg_id;
-
-static int just_started;
-
-static int message_pending;
-
-
-/* Clean up connection to a remote debugger.  */
-
-static void
-sds_close (int quitting)
-{
-  if (sds_desc)
-    serial_close (sds_desc);
-  sds_desc = NULL;
-}
-
-/* Stub for catch_errors.  */
-
-static int
-sds_start_remote (void *from_tty_p)
-{
-  int from_tty = * (int *) from_tty;
-  int c;
-  unsigned char buf[200];
-
-  immediate_quit++;		/* Allow user to interrupt it */
-
-  /* Ack any packet which the remote side has already sent.  */
-  serial_write (sds_desc, "{#*\r\n", 5);
-  serial_write (sds_desc, "{#}\r\n", 5);
-
-  while ((c = readchar (1)) >= 0)
-    printf_unfiltered ("%c", c);
-  printf_unfiltered ("\n");
-
-  next_msg_id = 251;
-
-  buf[0] = 26;
-  sds_send (buf, 1);
-
-  buf[0] = 0;
-  sds_send (buf, 1);
-
-  immediate_quit--;
-
-  start_remote (from_tty);	/* Initialize gdb process mechanisms */
-  return 1;
-}
-
-/* Open a connection to a remote debugger.
-   NAME is the filename used for communication.  */
-
-static void
-sds_open (char *name, int from_tty)
-{
-  if (name == 0)
-    error ("To open a remote debug connection, you need to specify what serial\n\
-device is attached to the remote system (e.g. /dev/ttya).");
-
-  target_preopen (from_tty);
-
-  unpush_target (&sds_ops);
-
-  sds_desc = serial_open (name);
-  if (!sds_desc)
-    perror_with_name (name);
-
-  if (baud_rate != -1)
-    {
-      if (serial_setbaudrate (sds_desc, baud_rate))
-	{
-	  serial_close (sds_desc);
-	  perror_with_name (name);
-	}
-    }
-
-
-  serial_raw (sds_desc);
-
-  /* If there is something sitting in the buffer we might take it as a
-     response to a command, which would be bad.  */
-  serial_flush_input (sds_desc);
-
-  if (from_tty)
-    {
-      puts_filtered ("Remote debugging using ");
-      puts_filtered (name);
-      puts_filtered ("\n");
-    }
-  push_target (&sds_ops);	/* Switch to using remote target now */
-
-  just_started = 1;
-
-  /* Start the remote connection; if error (0), discard this target.
-     In particular, if the user quits, be sure to discard it (we'd be
-     in an inconsistent state otherwise).  */
-  if (!catch_errors (sds_start_remote, &from_tty,
-		     "Couldn't establish connection to remote target\n",
-		     RETURN_MASK_ALL))
-    pop_target ();
-}
-
-/* This takes a program previously attached to and detaches it.  After
-   this is done, GDB can be used to debug some other program.  We
-   better not have left any breakpoints in the target program or it'll
-   die when it hits one.  */
-
-static void
-sds_detach (char *args, int from_tty)
-{
-  char buf[PBUFSIZ];
-
-  if (args)
-    error ("Argument given to \"detach\" when remotely debugging.");
-
-#if 0
-  /* Tell the remote target to detach.  */
-  strcpy (buf, "D");
-  sds_send (buf, 1);
-#endif
-
-  pop_target ();
-  if (from_tty)
-    puts_filtered ("Ending remote debugging.\n");
-}
-
-/* Convert hex digit A to a number.  */
-
-static int
-fromhex (int a)
-{
-  if (a >= '0' && a <= '9')
-    return a - '0';
-  else if (a >= 'a' && a <= 'f')
-    return a - 'a' + 10;
-  else
-    error ("Reply contains invalid hex digit %d", a);
-}
-
-static int
-tob64 (unsigned char *inbuf, char *outbuf, int len)
-{
-  int i, sum;
-  char *p;
-
-  if (len % 3 != 0)
-    error ("bad length");
-
-  p = outbuf;
-  for (i = 0; i < len; i += 3)
-    {
-      /* Collect the next three bytes into a number.  */
-      sum = ((long) *inbuf++) << 16;
-      sum |= ((long) *inbuf++) << 8;
-      sum |= ((long) *inbuf++);
-
-      /* Spit out 4 6-bit encodings.  */
-      *p++ = ((sum >> 18) & 0x3f) + '0';
-      *p++ = ((sum >> 12) & 0x3f) + '0';
-      *p++ = ((sum >> 6) & 0x3f) + '0';
-      *p++ = (sum & 0x3f) + '0';
-    }
-  return (p - outbuf);
-}
-
-static int
-fromb64 (char *inbuf, char *outbuf, int len)
-{
-  int i, sum;
-
-  if (len % 4 != 0)
-    error ("bad length");
-
-  for (i = 0; i < len; i += 4)
-    {
-      /* Collect 4 6-bit digits.  */
-      sum = (*inbuf++ - '0') << 18;
-      sum |= (*inbuf++ - '0') << 12;
-      sum |= (*inbuf++ - '0') << 6;
-      sum |= (*inbuf++ - '0');
-
-      /* Now take the resulting 24-bit number and get three bytes out
-         of it.  */
-      *outbuf++ = (sum >> 16) & 0xff;
-      *outbuf++ = (sum >> 8) & 0xff;
-      *outbuf++ = sum & 0xff;
-    }
-
-  return (len / 4) * 3;
-}
-
-
-/* Tell the remote machine to resume.  */
-
-static enum target_signal last_sent_signal = TARGET_SIGNAL_0;
-int last_sent_step;
-
-static void
-sds_resume (ptid_t ptid, int step, enum target_signal siggnal)
-{
-  unsigned char buf[PBUFSIZ];
-
-  last_sent_signal = siggnal;
-  last_sent_step = step;
-
-  buf[0] = (step ? 21 : 20);
-  buf[1] = 0;			/* (should be signal?) */
-
-  sds_send (buf, 2);
-}
-
-/* Send a message to target to halt it.  Target will respond, and send
-   us a message pending notice.  */
-
-static void
-sds_interrupt (int signo)
-{
-  unsigned char buf[PBUFSIZ];
-
-  /* If this doesn't work, try more severe steps.  */
-  signal (signo, sds_interrupt_twice);
-
-  if (remote_debug)
-    fprintf_unfiltered (gdb_stdlog, "sds_interrupt called\n");
-
-  buf[0] = 25;
-  sds_send (buf, 1);
-}
-
-static void (*ofunc) ();
-
-/* The user typed ^C twice.  */
-
-static void
-sds_interrupt_twice (int signo)
-{
-  signal (signo, ofunc);
-
-  interrupt_query ();
-
-  signal (signo, sds_interrupt);
-}
-
-/* Ask the user what to do when an interrupt is received.  */
-
-static void
-interrupt_query (void)
-{
-  target_terminal_ours ();
-
-  if (query ("Interrupted while waiting for the program.\n\
-Give up (and stop debugging it)? "))
-    {
-      target_mourn_inferior ();
-      deprecated_throw_reason (RETURN_QUIT);
-    }
-
-  target_terminal_inferior ();
-}
-
-/* If nonzero, ignore the next kill.  */
-int kill_kludge;
-
-/* 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 ptid_t
-sds_wait (ptid_t ptid, struct target_waitstatus *status)
-{
-  unsigned char buf[PBUFSIZ];
-  int retlen;
-
-  status->kind = TARGET_WAITKIND_EXITED;
-  status->value.integer = 0;
-
-  ofunc = (void (*)()) signal (SIGINT, sds_interrupt);
-
-  signal (SIGINT, ofunc);
-
-  if (just_started)
-    {
-      just_started = 0;
-      status->kind = TARGET_WAITKIND_STOPPED;
-      return inferior_ptid;
-    }
-
-  while (1)
-    {
-      getmessage (buf, 1);
-
-      if (message_pending)
-	{
-	  buf[0] = 26;
-	  retlen = sds_send (buf, 1);
-	  if (remote_debug)
-	    {
-	      fprintf_unfiltered (gdb_stdlog, "Signals: %02x%02x %02x %02x\n",
-				  buf[0], buf[1],
-				  buf[2], buf[3]);
-	    }
-	  message_pending = 0;
-	  status->kind = TARGET_WAITKIND_STOPPED;
-	  status->value.sig = TARGET_SIGNAL_TRAP;
-	  goto got_status;
-	}
-    }
-got_status:
-  return inferior_ptid;
-}
-
-static unsigned char sprs[16];
-
-/* Read the remote registers into the block REGS.  */
-/* Currently we just read all the registers, so we don't use regno.  */
-
-static void
-sds_fetch_registers (int regno)
-{
-  unsigned char buf[PBUFSIZ];
-  int i, retlen;
-  char *regs = alloca (deprecated_register_bytes ());
-
-  /* Unimplemented registers read as all bits zero.  */
-  memset (regs, 0, deprecated_register_bytes ());
-
-  buf[0] = 18;
-  buf[1] = 1;
-  buf[2] = 0;
-  retlen = sds_send (buf, 3);
-
-  for (i = 0; i < 4 * 6; ++i)
-    regs[i + 4 * 32 + 8 * 32] = buf[i];
-  for (i = 0; i < 4 * 4; ++i)
-    sprs[i] = buf[i + 4 * 7];
-
-  buf[0] = 18;
-  buf[1] = 2;
-  buf[2] = 0;
-  retlen = sds_send (buf, 3);
-
-  for (i = 0; i < retlen; i++)
-    regs[i] = buf[i];
-
-  /* (should warn about reply too short) */
-
-  for (i = 0; i < NUM_REGS; i++)
-    regcache_raw_supply (current_regcache, i,
-			 &regs[DEPRECATED_REGISTER_BYTE (i)]);
-}
-
-/* Prepare to store registers.  Since we may send them all, we have to
-   read out the ones we don't want to change first.  */
-
-static void
-sds_prepare_to_store (void)
-{
-  /* Make sure the entire registers array is valid.  */
-  deprecated_read_register_bytes (0, (char *) NULL, deprecated_register_bytes ());
-}
-
-/* Store register REGNO, or all registers if REGNO == -1, from the contents
-   of REGISTERS.  FIXME: ignores errors.  */
-
-static void
-sds_store_registers (int regno)
-{
-  unsigned char *p, buf[PBUFSIZ];
-  int i;
-
-  /* Store all the special-purpose registers.  */
-  p = buf;
-  *p++ = 19;
-  *p++ = 1;
-  *p++ = 0;
-  *p++ = 0;
-  for (i = 0; i < 4 * 6; i++)
-    *p++ = deprecated_registers[i + 4 * 32 + 8 * 32];
-  for (i = 0; i < 4 * 1; i++)
-    *p++ = 0;
-  for (i = 0; i < 4 * 4; i++)
-    *p++ = sprs[i];
-
-  sds_send (buf, p - buf);
-
-  /* Store all the general-purpose registers.  */
-  p = buf;
-  *p++ = 19;
-  *p++ = 2;
-  *p++ = 0;
-  *p++ = 0;
-  for (i = 0; i < 4 * 32; i++)
-    *p++ = deprecated_registers[i];
-
-  sds_send (buf, p - buf);
-
-}
-
-/* Write memory data directly to the remote machine.  This does not
-   inform the data cache; the data cache uses this.  MEMADDR is the
-   address in the remote memory space.  MYADDR is the address of the
-   buffer in our space.  LEN is the number of bytes.
-
-   Returns number of bytes transferred, or 0 for error.  */
-
-static int
-sds_write_bytes (CORE_ADDR memaddr, char *myaddr, int len)
-{
-  int max_buf_size;		/* Max size of packet output buffer */
-  int origlen;
-  unsigned char buf[PBUFSIZ];
-  int todo;
-  int i;
-
-  /* Chop the transfer down if necessary */
-
-  max_buf_size = 150;
-
-  origlen = len;
-  while (len > 0)
-    {
-      todo = min (len, max_buf_size);
-
-      buf[0] = 13;
-      buf[1] = 0;
-      buf[2] = (int) (memaddr >> 24) & 0xff;
-      buf[3] = (int) (memaddr >> 16) & 0xff;
-      buf[4] = (int) (memaddr >> 8) & 0xff;
-      buf[5] = (int) (memaddr) & 0xff;
-      buf[6] = 1;
-      buf[7] = 0;
-
-      for (i = 0; i < todo; i++)
-	buf[i + 8] = myaddr[i];
-
-      sds_send (buf, 8 + todo);
-
-      /* (should look at result) */
-
-      myaddr += todo;
-      memaddr += todo;
-      len -= todo;
-    }
-  return origlen;
-}
-
-/* Read memory data directly from the remote machine.  This does not
-   use the data cache; the data cache uses this.  MEMADDR is the
-   address in the remote memory space.  MYADDR is the address of the
-   buffer in our space.  LEN is the number of bytes.
-
-   Returns number of bytes transferred, or 0 for error.  */
-
-static int
-sds_read_bytes (CORE_ADDR memaddr, char *myaddr, int len)
-{
-  int max_buf_size;		/* Max size of packet output buffer */
-  int origlen, retlen;
-  unsigned char buf[PBUFSIZ];
-  int todo;
-  int i;
-
-  /* Chop the transfer down if necessary */
-
-  max_buf_size = 150;
-
-  origlen = len;
-  while (len > 0)
-    {
-      todo = min (len, max_buf_size);
-
-      buf[0] = 12;
-      buf[1] = 0;
-      buf[2] = (int) (memaddr >> 24) & 0xff;
-      buf[3] = (int) (memaddr >> 16) & 0xff;
-      buf[4] = (int) (memaddr >> 8) & 0xff;
-      buf[5] = (int) (memaddr) & 0xff;
-      buf[6] = (int) (todo >> 8) & 0xff;
-      buf[7] = (int) (todo) & 0xff;
-      buf[8] = 1;
-
-      retlen = sds_send (buf, 9);
-
-      if (retlen - 2 != todo)
-	{
-	  return 0;
-	}
-
-      /* Reply describes memory byte by byte. */
-
-      for (i = 0; i < todo; i++)
-	myaddr[i] = buf[i + 2];
-
-      myaddr += todo;
-      memaddr += todo;
-      len -= todo;
-    }
-
-  return origlen;
-}
-
-/* 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.  TARGET is unused.  */
-
-static int
-sds_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int should_write,
-		 struct mem_attrib *attrib, struct target_ops *target)
-{
-  int res;
-
-  if (should_write)
-    res = sds_write_bytes (memaddr, myaddr, len);
-  else
-    res = sds_read_bytes (memaddr, myaddr, len);
-  
-  return res;
-}
-
-
-static void
-sds_files_info (struct target_ops *ignore)
-{
-  puts_filtered ("Debugging over a serial connection, using SDS protocol.\n");
-}
-
-/* Stuff for dealing with the packets which are part of this protocol.
-   See comment at top of file for details.  */
-
-/* Read a single character from the remote end, masking it down to 7 bits. */
-
-static int
-readchar (int timeout)
-{
-  int ch;
-
-  ch = serial_readchar (sds_desc, timeout);
-
-  if (remote_debug > 1 && ch >= 0)
-    fprintf_unfiltered (gdb_stdlog, "%c(%x)", ch, ch);
-
-  switch (ch)
-    {
-    case SERIAL_EOF:
-      error ("Remote connection closed");
-    case SERIAL_ERROR:
-      perror_with_name ("Remote communication error");
-    case SERIAL_TIMEOUT:
-      return ch;
-    default:
-      return ch & 0x7f;
-    }
-}
-
-/* An SDS-style checksum is a sum of the bytes modulo 253.  (Presumably
-   because 253, 254, and 255 are special flags in the protocol.)  */
-
-static int
-compute_checksum (int csum, char *buf, int len)
-{
-  int i;
-
-  for (i = 0; i < len; ++i)
-    csum += (unsigned char) buf[i];
-
-  csum %= 253;
-  return csum;
-}
-
-/* Send the command in BUF to the remote machine, and read the reply
-   into BUF also.  */
-
-static int
-sds_send (unsigned char *buf, int len)
-{
-  putmessage (buf, len);
-
-  return getmessage (buf, 0);
-}
-
-/* Send a message to the remote machine.  */
-
-static int
-putmessage (unsigned char *buf, int len)
-{
-  int i, enclen;
-  unsigned char csum = 0;
-  char buf2[PBUFSIZ], buf3[PBUFSIZ];
-  unsigned char header[3];
-  char *p;
-
-  /* Copy the packet into buffer BUF2, encapsulating it
-     and giving it a checksum.  */
-
-  if (len > 170)		/* Prosanity check */
-    internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
-
-  if (remote_debug)
-    {
-      fprintf_unfiltered (gdb_stdlog, "Message to send: \"");
-      for (i = 0; i < len; ++i)
-	fprintf_unfiltered (gdb_stdlog, "%02x", buf[i]);
-      fprintf_unfiltered (gdb_stdlog, "\"\n");
-    }
-
-  p = buf2;
-  *p++ = '$';
-
-  if (len % 3 != 0)
-    {
-      buf[len] = '\0';
-      buf[len + 1] = '\0';
-    }
-
-  header[1] = next_msg_id;
-
-  header[2] = len;
-
-  csum = compute_checksum (csum, buf, len);
-  csum = compute_checksum (csum, header + 1, 2);
-
-  header[0] = csum;
-
-  tob64 (header, p, 3);
-  p += 4;
-  enclen = tob64 (buf, buf3, ((len + 2) / 3) * 3);
-
-  for (i = 0; i < enclen; ++i)
-    *p++ = buf3[i];
-  *p++ = '\r';
-  *p++ = '\n';
-
-  next_msg_id = (next_msg_id + 3) % 245;
-
-  /* Send it over and over until we get a positive ack.  */
-
-  while (1)
-    {
-      if (remote_debug)
-	{
-	  *p = '\0';
-	  fprintf_unfiltered (gdb_stdlog, "Sending encoded: \"%s\"", buf2);
-	  fprintf_unfiltered (gdb_stdlog,
-			      "  (Checksum %d, id %d, length %d)\n",
-			      header[0], header[1], header[2]);
-	  gdb_flush (gdb_stdlog);
-	}
-      if (serial_write (sds_desc, buf2, p - buf2))
-	perror_with_name ("putmessage: write failed");
-
-      return 1;
-    }
-}
-
-/* Come here after finding the start of the frame.  Collect the rest
-   into BUF.  Returns 0 on any error, 1 on success.  */
-
-static int
-read_frame (char *buf)
-{
-  char *bp;
-  int c;
-
-  bp = buf;
-
-  while (1)
-    {
-      c = readchar (sds_timeout);
-
-      switch (c)
-	{
-	case SERIAL_TIMEOUT:
-	  if (remote_debug)
-	    fputs_filtered ("Timeout in mid-message, retrying\n", gdb_stdlog);
-	  return 0;
-	case '$':
-	  if (remote_debug)
-	    fputs_filtered ("Saw new packet start in middle of old one\n",
-			    gdb_stdlog);
-	  return 0;		/* Start a new packet, count retries */
-	case '\r':
-	  break;
-
-	case '\n':
-	  {
-	    *bp = '\000';
-	    if (remote_debug)
-	      fprintf_unfiltered (gdb_stdlog, "Received encoded: \"%s\"\n",
-				  buf);
-	    return 1;
-	  }
-
-	default:
-	  if (bp < buf + PBUFSIZ - 1)
-	    {
-	      *bp++ = c;
-	      continue;
-	    }
-
-	  *bp = '\0';
-	  puts_filtered ("Message too long: ");
-	  puts_filtered (buf);
-	  puts_filtered ("\n");
-
-	  return 0;
-	}
-    }
-}
-
-/* Read a packet from the remote machine, with error checking,
-   and store it in BUF.  BUF is expected to be of size PBUFSIZ.
-   If FOREVER, wait forever rather than timing out; this is used
-   while the target is executing user code.  */
-
-static int
-getmessage (unsigned char *buf, int forever)
-{
-  int c, c2, c3;
-  int tries;
-  int timeout;
-  int val, i, len, csum;
-  unsigned char header[3];
-  unsigned char inbuf[500];
-
-  strcpy (buf, "timeout");
-
-  if (forever)
-    {
-      timeout = watchdog > 0 ? watchdog : -1;
-    }
-
-  else
-    timeout = sds_timeout;
-
-#define MAX_TRIES 3
-
-  for (tries = 1; tries <= MAX_TRIES; tries++)
-    {
-      /* This can loop forever if the remote side sends us characters
-         continuously, but if it pauses, we'll get a zero from readchar
-         because of timeout.  Then we'll count that as a retry.  */
-
-      /* Note that we will only wait forever prior to the start of a packet.
-         After that, we expect characters to arrive at a brisk pace.  They
-         should show up within sds_timeout intervals.  */
-
-      do
-	{
-	  c = readchar (timeout);
-
-	  if (c == SERIAL_TIMEOUT)
-	    {
-	      if (forever)	/* Watchdog went off.  Kill the target. */
-		{
-		  target_mourn_inferior ();
-		  error ("Watchdog has expired.  Target detached.\n");
-		}
-	      if (remote_debug)
-		fputs_filtered ("Timed out.\n", gdb_stdlog);
-	      goto retry;
-	    }
-	}
-      while (c != '$' && c != '{');
-
-      /* We might have seen a "trigraph", a sequence of three characters
-         that indicate various sorts of communication state.  */
-
-      if (c == '{')
-	{
-	  /* Read the other two chars of the trigraph. */
-	  c2 = readchar (timeout);
-	  c3 = readchar (timeout);
-	  if (remote_debug)
-	    fprintf_unfiltered (gdb_stdlog, "Trigraph %c%c%c received\n",
-				c, c2, c3);
-	  if (c3 == '+')
-	    {
-	      message_pending = 1;
-	      return 0;		/*???? */
-	    }
-	  continue;
-	}
-
-      val = read_frame (inbuf);
-
-      if (val == 1)
-	{
-	  fromb64 (inbuf, header, 4);
-	  /* (should check out other bits) */
-	  fromb64 (inbuf + 4, buf, strlen (inbuf) - 4);
-
-	  len = header[2];
-
-	  csum = 0;
-	  csum = compute_checksum (csum, buf, len);
-	  csum = compute_checksum (csum, header + 1, 2);
-
-	  if (csum != header[0])
-	    fprintf_unfiltered (gdb_stderr,
-			    "Checksum mismatch: computed %d, received %d\n",
-				csum, header[0]);
-
-	  if (header[2] == 0xff)
-	    fprintf_unfiltered (gdb_stderr, "Requesting resend...\n");
-
-	  if (remote_debug)
-	    {
-	      fprintf_unfiltered (gdb_stdlog,
-				"... (Got checksum %d, id %d, length %d)\n",
-				  header[0], header[1], header[2]);
-	      fprintf_unfiltered (gdb_stdlog, "Message received: \"");
-	      for (i = 0; i < len; ++i)
-		{
-		  fprintf_unfiltered (gdb_stdlog, "%02x", (unsigned char) buf[i]);
-		}
-	      fprintf_unfiltered (gdb_stdlog, "\"\n");
-	    }
-
-	  /* no ack required? */
-	  return len;
-	}
-
-      /* Try the whole thing again.  */
-    retry:
-      /* need to do something here */
-      ;
-    }
-
-  /* We have tried hard enough, and just can't receive the packet.  Give up. */
-
-  printf_unfiltered ("Ignoring packet error, continuing...\n");
-  return 0;
-}
-
-static void
-sds_kill (void)
-{
-  /* Don't try to do anything to the target.  */
-}
-
-static void
-sds_mourn (void)
-{
-  unpush_target (&sds_ops);
-  generic_mourn_inferior ();
-}
-
-static void
-sds_create_inferior (char *exec_file, char *args, char **env, int from_tty)
-{
-  inferior_ptid = pid_to_ptid (42000);
-
-  /* Clean up from the last time we were running.  */
-  clear_proceed_status ();
-
-  write_pc (bfd_get_start_address (exec_bfd));
-}
-
-static void
-sds_load (char *filename, int from_tty)
-{
-  generic_load (filename, from_tty);
-
-  inferior_ptid = null_ptid;
-}
-
-/* The SDS monitor has commands for breakpoint insertion, although it
-   it doesn't actually manage the breakpoints, it just returns the
-   replaced instruction back to the debugger.  */
-
-static int
-sds_insert_breakpoint (struct bp_target_info *bp_tgt)
-{
-  CORE_ADDR addr = bp_tgt->placed_address;
-  int i, retlen;
-  unsigned char *p, buf[PBUFSIZ];
-
-  p = buf;
-  *p++ = 16;
-  *p++ = 0;
-  *p++ = (int) (addr >> 24) & 0xff;
-  *p++ = (int) (addr >> 16) & 0xff;
-  *p++ = (int) (addr >> 8) & 0xff;
-  *p++ = (int) (addr) & 0xff;
-
-  retlen = sds_send (buf, p - buf);
-
-  for (i = 0; i < 4; ++i)
-    bp_tgt->shadow_contents[i] = buf[i + 2];
-
-  return 0;
-}
-
-static int
-sds_remove_breakpoint (struct bp_target_info *bp_tgt)
-{
-  CORE_ADDR addr = bp_tgt->placed_address;
-  int i, retlen;
-  unsigned char *p, buf[PBUFSIZ];
-
-  p = buf;
-  *p++ = 17;
-  *p++ = 0;
-  *p++ = (int) (addr >> 24) & 0xff;
-  *p++ = (int) (addr >> 16) & 0xff;
-  *p++ = (int) (addr >> 8) & 0xff;
-  *p++ = (int) (addr) & 0xff;
-  for (i = 0; i < 4; ++i)
-    *p++ = bp_tgt->shadow_contents[i];
-
-  retlen = sds_send (buf, p - buf);
-
-  return 0;
-}
-
-static void
-init_sds_ops (void)
-{
-  sds_ops.to_shortname = "sds";
-  sds_ops.to_longname = "Remote serial target with SDS protocol";
-  sds_ops.to_doc = "Use a remote computer via a serial line; using the SDS protocol.\n\
-Specify the serial device it is connected to (e.g. /dev/ttya).";
-  sds_ops.to_open = sds_open;
-  sds_ops.to_close = sds_close;
-  sds_ops.to_detach = sds_detach;
-  sds_ops.to_resume = sds_resume;
-  sds_ops.to_wait = sds_wait;
-  sds_ops.to_fetch_registers = sds_fetch_registers;
-  sds_ops.to_store_registers = sds_store_registers;
-  sds_ops.to_prepare_to_store = sds_prepare_to_store;
-  sds_ops.deprecated_xfer_memory = sds_xfer_memory;
-  sds_ops.to_files_info = sds_files_info;
-  sds_ops.to_insert_breakpoint = sds_insert_breakpoint;
-  sds_ops.to_remove_breakpoint = sds_remove_breakpoint;
-  sds_ops.to_kill = sds_kill;
-  sds_ops.to_load = sds_load;
-  sds_ops.to_create_inferior = sds_create_inferior;
-  sds_ops.to_mourn_inferior = sds_mourn;
-  sds_ops.to_stratum = process_stratum;
-  sds_ops.to_has_all_memory = 1;
-  sds_ops.to_has_memory = 1;
-  sds_ops.to_has_stack = 1;
-  sds_ops.to_has_registers = 1;
-  sds_ops.to_has_execution = 1;
-  sds_ops.to_magic = OPS_MAGIC;
-}
-
-/* Put a command string, in args, out to the monitor and display the
-   reply message.  */
-
-static void
-sds_command (char *args, int from_tty)
-{
-  char *p;
-  int i, len, retlen;
-  unsigned char buf[1000];
-
-  /* Convert hexadecimal chars into a byte buffer.  */
-  p = args;
-  len = 0;
-  while (*p != '\0')
-    {
-      buf[len++] = fromhex (p[0]) * 16 + fromhex (p[1]);
-      if (p[1] == '\0')
-	break;
-      p += 2;
-    }
-
-  retlen = sds_send (buf, len);
-
-  printf_filtered ("Reply is ");
-  for (i = 0; i < retlen; ++i)
-    {
-      printf_filtered ("%02x", buf[i]);
-    }
-  printf_filtered ("\n");
-}
-
-void
-_initialize_remote_sds (void)
-{
-  init_sds_ops ();
-  add_target (&sds_ops);
-
-  add_setshow_integer_cmd ("sdstimeout", no_class, &sds_timeout, _("\
-Set timeout value for sds read."), _("\
-Show timeout value for sds read."), NULL,
-			   NULL,
-			   NULL, /* FIXME: i18n: */
-			   &setlist, &showlist);
-
-  add_com ("sds", class_obscure, sds_command,
-	   _("Send a command to the SDS monitor."));
-}