Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 970 insertions, 0 deletions

diff --git a/gdb/sparcl-tdep.c b/gdb/sparcl-tdep.c
new file mode 100644
index 0000000..e39bf30
--- /dev/null
+++ b/gdb/sparcl-tdep.c
@@ -0,0 +1,970 @@
+/* Target dependent code for the Fujitsu SPARClite for GDB, the GNU debugger.
+   Copyright 1994, 1995, 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 "gdbcore.h"
+#include "breakpoint.h"
+#include "target.h"
+#include "serial.h"
+#include <sys/types.h>
+
+#if (!defined(__GO32__) && !defined(_WIN32)) || defined(__CYGWIN32__)
+#define HAVE_SOCKETS
+#include <sys/time.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#endif
+
+extern struct target_ops sparclite_ops;	/* Forward decl */
+extern struct target_ops remote_ops;
+
+static char *remote_target_name = NULL;
+static serial_t remote_desc = NULL;
+static int serial_flag;
+#ifdef HAVE_SOCKETS
+static int udp_fd = -1;
+#endif
+
+static serial_t open_tty PARAMS ((char *name));
+static int send_resp PARAMS ((serial_t desc, char c));
+static void close_tty PARAMS ((int ignore));
+#ifdef HAVE_SOCKETS
+static int recv_udp_buf PARAMS ((int fd, unsigned char *buf, int len, int timeout));
+static int send_udp_buf PARAMS ((int fd, unsigned char *buf, int len));
+#endif
+static void sparclite_open PARAMS ((char *name, int from_tty));
+static void sparclite_close PARAMS ((int quitting));
+static void download PARAMS ((char *target_name, char *args, int from_tty,
+			      void (*write_routine) (bfd *from_bfd,
+						     asection *from_sec,
+						     file_ptr from_addr,
+						     bfd_vma to_addr, int len),
+			      void (*start_routine) (bfd_vma entry)));
+static void sparclite_serial_start PARAMS ((bfd_vma entry));
+static void sparclite_serial_write PARAMS ((bfd *from_bfd, asection *from_sec,
+					    file_ptr from_addr,
+					    bfd_vma to_addr, int len));
+#ifdef HAVE_SOCKETS
+static unsigned short calc_checksum PARAMS ((unsigned char *buffer,
+					     int count));
+static void sparclite_udp_start PARAMS ((bfd_vma entry));
+static void sparclite_udp_write PARAMS ((bfd *from_bfd, asection *from_sec,
+					 file_ptr from_addr, bfd_vma to_addr,
+					 int len));
+#endif
+static void sparclite_download PARAMS ((char *filename, int from_tty));
+
+#define DDA2_SUP_ASI		0xb000000
+#define DDA1_SUP_ASI		0xb0000
+
+#define DDA2_ASI_MASK 		0xff000000
+#define DDA1_ASI_MASK 		0xff0000 
+#define DIA2_SUP_MODE 		0x8000
+#define DIA1_SUP_MODE 		0x4000
+#define DDA2_ENABLE 		0x100
+#define DDA1_ENABLE 		0x80
+#define DIA2_ENABLE 		0x40
+#define DIA1_ENABLE 		0x20
+#define DSINGLE_STEP 		0x10		/* not used */
+#define DDV_TYPE_MASK 		0xc
+#define DDV_TYPE_LOAD 		0x0
+#define DDV_TYPE_STORE 		0x4
+#define DDV_TYPE_ACCESS 	0x8
+#define DDV_TYPE_ALWAYS		0xc
+#define DDV_COND		0x2
+#define DDV_MASK		0x1
+
+int
+sparclite_insert_watchpoint (addr, len, type)
+     CORE_ADDR addr;
+     int len;
+     int type;
+{
+  CORE_ADDR dcr;
+
+  dcr = read_register (DCR_REGNUM);
+
+  if (!(dcr & DDA1_ENABLE))
+    {
+      write_register (DDA1_REGNUM, addr);
+      dcr &= ~(DDA1_ASI_MASK | DDV_TYPE_MASK);
+      dcr |= (DDA1_SUP_ASI | DDA1_ENABLE);
+      if (type == 1)
+	{
+	  write_register (DDV1_REGNUM, 0);
+	  write_register (DDV2_REGNUM, 0xffffffff);
+	  dcr |= (DDV_TYPE_LOAD & (~DDV_COND & ~DDV_MASK));
+	}   
+      else if (type == 0)
+	{
+	  write_register (DDV1_REGNUM, 0);
+	  write_register (DDV2_REGNUM, 0xffffffff);
+	  dcr |= (DDV_TYPE_STORE & (~DDV_COND & ~DDV_MASK));
+	}
+      else
+	{
+	  write_register (DDV1_REGNUM, 0);
+	  write_register (DDV2_REGNUM, 0xffffffff);
+	  dcr |= (DDV_TYPE_ACCESS);
+	}
+      write_register (DCR_REGNUM, dcr);
+    }
+  else if (!(dcr & DDA2_ENABLE))
+    {
+      write_register (DDA2_REGNUM, addr);
+      dcr &= ~(DDA2_ASI_MASK & DDV_TYPE_MASK);
+      dcr |= (DDA2_SUP_ASI | DDA2_ENABLE);
+      if (type == 1)
+	{
+	  write_register (DDV1_REGNUM, 0);
+	  write_register (DDV2_REGNUM, 0xffffffff);
+	  dcr |= (DDV_TYPE_LOAD & ~DDV_COND & ~DDV_MASK);
+	}
+      else if (type == 0)
+	{
+	  write_register (DDV1_REGNUM, 0);
+	  write_register (DDV2_REGNUM, 0xffffffff);
+	  dcr |= (DDV_TYPE_STORE & ~DDV_COND & ~DDV_MASK);
+	}
+      else
+	{
+	  write_register (DDV1_REGNUM, 0);
+	  write_register (DDV2_REGNUM, 0xffffffff);
+	  dcr |= (DDV_TYPE_ACCESS);
+	}
+      write_register (DCR_REGNUM, dcr);
+    }
+  else
+    return -1;
+
+  return 0;
+} 
+
+int
+sparclite_remove_watchpoint (addr, len, type)
+     CORE_ADDR addr;
+     int len;
+     int type;
+{
+  CORE_ADDR dcr, dda1, dda2;
+
+  dcr = read_register (DCR_REGNUM);
+  dda1 = read_register (DDA1_REGNUM);
+  dda2 = read_register (DDA2_REGNUM);
+
+  if ((dcr & DDA1_ENABLE) && addr == dda1)
+    write_register (DCR_REGNUM, (dcr & ~DDA1_ENABLE));
+  else if ((dcr & DDA2_ENABLE) && addr == dda2)
+    write_register (DCR_REGNUM, (dcr & ~DDA2_ENABLE));
+  else
+    return -1;
+
+  return 0;
+}
+
+int
+sparclite_insert_hw_breakpoint (addr, len)
+     CORE_ADDR addr;
+     int len;
+{
+  CORE_ADDR dcr;
+
+  dcr = read_register (DCR_REGNUM);
+  
+  if (!(dcr & DIA1_ENABLE))
+    {
+      write_register (DIA1_REGNUM, addr);
+      write_register (DCR_REGNUM, (dcr | DIA1_ENABLE | DIA1_SUP_MODE));
+    }
+  else if (!(dcr & DIA2_ENABLE))
+    {
+      write_register (DIA2_REGNUM, addr);
+      write_register (DCR_REGNUM, (dcr | DIA2_ENABLE | DIA2_SUP_MODE));
+    }
+  else
+    return -1;
+
+  return 0;
+}
+
+int
+sparclite_remove_hw_breakpoint (addr, shadow)
+     CORE_ADDR addr;
+     int shadow;
+{
+  CORE_ADDR dcr, dia1, dia2;
+
+  dcr = read_register (DCR_REGNUM);
+  dia1 = read_register (DIA1_REGNUM);
+  dia2 = read_register (DIA2_REGNUM);
+  
+  if ((dcr & DIA1_ENABLE) && addr == dia1)
+    write_register (DCR_REGNUM, (dcr & ~DIA1_ENABLE));
+  else if ((dcr & DIA2_ENABLE) && addr == dia2)
+    write_register (DCR_REGNUM, (dcr & ~DIA2_ENABLE));
+  else
+    return -1;
+
+  return 0;
+}
+
+int
+sparclite_check_watch_resources (type, cnt, ot)
+     int type;
+     int cnt;
+     int ot;
+{
+  /* Watchpoints not supported on simulator.  */
+  if (strcmp (target_shortname, "sim") == 0)
+    return 0;
+
+  if (type == bp_hardware_breakpoint)
+    {
+      if (TARGET_HW_BREAK_LIMIT == 0)
+	return 0;
+      else if (cnt <= TARGET_HW_BREAK_LIMIT)
+	return 1;
+    }
+  else
+    {
+      if (TARGET_HW_WATCH_LIMIT == 0)
+	return 0;
+      else if (ot)
+	return -1;
+      else if (cnt <= TARGET_HW_WATCH_LIMIT)
+	return 1;
+    }
+  return -1;
+}
+
+CORE_ADDR
+sparclite_stopped_data_address ()
+{
+  CORE_ADDR dsr, dda1, dda2;
+
+  dsr = read_register (DSR_REGNUM);
+  dda1 = read_register (DDA1_REGNUM);
+  dda2 = read_register (DDA2_REGNUM);
+
+  if (dsr & 0x10)
+    return dda1;
+  else if (dsr & 0x20)
+    return dda2;
+  else
+    return 0;
+}
+
+static serial_t
+open_tty (name)
+     char *name;
+{
+  serial_t desc;
+
+  desc = SERIAL_OPEN (name);
+  if (!desc)
+    perror_with_name (name);
+
+  if (baud_rate != -1)
+    {
+      if (SERIAL_SETBAUDRATE (desc, baud_rate))
+	{
+	  SERIAL_CLOSE (desc);
+	  perror_with_name (name);
+	}
+    }
+
+  SERIAL_RAW (desc);
+
+  SERIAL_FLUSH_INPUT (desc);
+
+  return desc;
+}
+
+/* Read a single character from the remote end, masking it down to 7 bits. */
+
+static int
+readchar (desc, timeout)
+     serial_t desc;
+     int timeout;
+{
+  int ch;
+  char s[10];
+
+  ch = SERIAL_READCHAR (desc, timeout);
+
+  switch (ch)
+    {
+    case SERIAL_EOF:
+      error ("SPARClite remote connection closed");
+    case SERIAL_ERROR:
+      perror_with_name ("SPARClite communication error");
+    case SERIAL_TIMEOUT:
+      error ("SPARClite remote timeout");
+    default:
+      if (remote_debug > 0)
+	{
+	  sprintf (s, "[%02x]", ch & 0xff);
+	  puts_debug ("read -->", s, "<--");
+	}
+      return ch;
+    }
+}
+
+static void
+debug_serial_write (desc, buf, len)
+     serial_t desc;
+     char *buf;
+     int len;
+{
+  char s[10];
+
+  SERIAL_WRITE (desc, buf, len);
+  if (remote_debug > 0)
+    {
+      while (len-- > 0)
+	{
+	  sprintf (s, "[%02x]", *buf & 0xff);
+	  puts_debug ("Sent -->", s, "<--");
+	  buf++;
+	}
+    }
+}
+
+
+static int
+send_resp (desc, c)
+     serial_t desc;
+     char c;
+{
+  debug_serial_write (desc, &c, 1);
+  return readchar (desc, remote_timeout);
+}
+
+static void
+close_tty (ignore)
+     int ignore;
+{
+  if (!remote_desc)
+    return;
+
+  SERIAL_CLOSE (remote_desc);
+
+  remote_desc = NULL;
+}
+
+#ifdef HAVE_SOCKETS
+static int
+recv_udp_buf (fd, buf, len, timeout)
+     int fd, len;
+     unsigned char *buf;
+     int timeout;
+{
+  int cc;
+  fd_set readfds;
+
+  FD_ZERO (&readfds);
+  FD_SET (fd, &readfds);
+
+  if (timeout >= 0)
+    {
+      struct timeval timebuf;
+
+      timebuf.tv_sec = timeout;
+      timebuf.tv_usec = 0;
+      cc = select (fd + 1, &readfds, 0, 0, &timebuf);
+    }
+  else
+    cc = select (fd + 1, &readfds, 0, 0, 0);
+
+  if (cc == 0)
+    return 0;
+
+  if (cc != 1)
+    perror_with_name ("recv_udp_buf: Bad return value from select:");
+
+  cc = recv (fd, buf, len, 0);
+
+  if (cc < 0)
+    perror_with_name ("Got an error from recv: ");
+}
+
+static int
+send_udp_buf (fd, buf, len)
+     int fd, len;
+     unsigned char *buf;
+{
+  int cc;
+
+  cc = send (fd, buf, len, 0);
+
+  if (cc == len)
+    return;
+
+  if (cc < 0)
+    perror_with_name ("Got an error from send: ");
+
+  error ("Short count in send: tried %d, sent %d\n", len, cc);
+}
+#endif /* HAVE_SOCKETS */
+
+static void
+sparclite_open (name, from_tty)
+     char *name;
+     int from_tty;
+{
+  struct cleanup *old_chain;
+  int c;
+  char *p;
+
+  if (!name)
+    error ("You need to specify what device or hostname is associated with the SparcLite board.");
+
+  target_preopen (from_tty);
+
+  unpush_target (&sparclite_ops);
+
+  if (remote_target_name)
+    free (remote_target_name);
+
+  remote_target_name = strsave (name);
+
+  /* We need a 'serial' or 'udp' keyword to disambiguate host:port, which can
+     mean either a serial port on a terminal server, or the IP address of a
+     SPARClite demo board.  If there's no colon, then it pretty much has to be
+     a local device (except for DOS... grrmble) */
+
+  p = strchr (name, ' ');
+
+  if (p)
+    {
+      *p++ = '\000';
+      while ((*p != '\000') && isspace (*p)) p++;
+
+      if (strncmp (name, "serial", strlen (name)) == 0)
+	serial_flag = 1;
+      else if (strncmp (name, "udp", strlen (name)) == 0)
+	serial_flag = 0;
+      else
+	error ("Must specify either `serial' or `udp'.");
+    }
+  else
+    {
+      p = name;
+
+      if (!strchr (name, ':'))
+	serial_flag = 1;	/* No colon is unambiguous (local device) */
+      else
+	error ("Usage: target sparclite serial /dev/ttyb\n\
+or: target sparclite udp host");
+    }
+
+  if (serial_flag)
+    {
+      remote_desc = open_tty (p);
+
+      old_chain = make_cleanup ((make_cleanup_func) close_tty, 0);
+
+      c = send_resp (remote_desc, 0x00);
+
+      if (c != 0xaa)
+	error ("Unknown response (0x%x) from SparcLite.  Try resetting the board.",
+	       c);
+
+      c = send_resp (remote_desc, 0x55);
+
+      if (c != 0x55)
+	error ("Sparclite appears to be ill.");
+    }
+  else
+    {
+#ifdef HAVE_SOCKETS
+      struct hostent *he;
+      struct sockaddr_in sockaddr;
+      unsigned char buffer[100];
+      int cc;
+
+      /* Setup the socket.  Must be raw UDP. */
+
+      he = gethostbyname (p);
+
+      if (!he)
+	error ("No such host %s.", p);
+
+      udp_fd = socket (PF_INET, SOCK_DGRAM, 0);
+
+      old_chain = make_cleanup (close, udp_fd);
+
+      sockaddr.sin_family = PF_INET;
+      sockaddr.sin_port = htons(7000);
+      memcpy (&sockaddr.sin_addr.s_addr, he->h_addr, sizeof (struct in_addr));
+
+      if (connect (udp_fd, &sockaddr, sizeof(sockaddr)))
+	perror_with_name ("Connect failed");
+
+      buffer[0] = 0x5;
+      buffer[1] = 0;
+
+      send_udp_buf (udp_fd, buffer, 2);	/* Request version */
+      cc = recv_udp_buf (udp_fd, buffer, sizeof(buffer), 5); /* Get response */
+      if (cc == 0)
+	error ("SPARClite isn't responding.");
+
+      if (cc < 3)
+	error ("SPARClite appears to be ill.");
+#else
+      error ("UDP downloading is not supported for DOS hosts.");
+#endif /* HAVE_SOCKETS */
+    }
+
+  printf_unfiltered ("[SPARClite appears to be alive]\n");
+
+  push_target (&sparclite_ops);
+
+  discard_cleanups (old_chain);
+
+  return;
+}
+
+static void
+sparclite_close (quitting)
+     int quitting;
+{
+  if (serial_flag)
+    close_tty (0);
+#ifdef HAVE_SOCKETS
+  else
+    if (udp_fd != -1)
+      close (udp_fd);
+#endif
+}
+
+#define LOAD_ADDRESS 0x40000000
+
+static void
+download (target_name, args, from_tty, write_routine, start_routine)
+     char *target_name;
+     char *args;
+     int from_tty;
+     void (*write_routine) PARAMS ((bfd *from_bfd, asection *from_sec,
+				    file_ptr from_addr, bfd_vma to_addr, int len));
+     void (*start_routine) PARAMS ((bfd_vma entry));
+{
+  struct cleanup *old_chain;
+  asection *section;
+  bfd *pbfd;
+  bfd_vma entry;
+  int i;
+#define WRITESIZE 1024
+  char *filename;
+  int quiet;
+  int nostart;
+
+  quiet = 0;
+  nostart = 0;
+  filename = NULL;
+
+  while (*args != '\000')
+    {
+      char *arg;
+
+      while (isspace (*args)) args++;
+
+      arg = args;
+
+      while ((*args != '\000') && !isspace (*args)) args++;
+
+      if (*args != '\000')
+	*args++ = '\000';
+
+      if (*arg != '-')
+	filename = arg;
+      else if (strncmp (arg, "-quiet", strlen (arg)) == 0)
+	quiet = 1;
+      else if (strncmp (arg, "-nostart", strlen (arg)) == 0)
+	nostart = 1;
+      else
+	error ("unknown option `%s'", arg);
+    }
+
+  if (!filename)
+    filename = get_exec_file (1);
+
+  pbfd = bfd_openr (filename, gnutarget);
+  if (pbfd == NULL)
+    {
+      perror_with_name (filename);
+      return;
+    }
+  old_chain = make_cleanup ((make_cleanup_func) bfd_close, pbfd);
+
+  if (!bfd_check_format (pbfd, bfd_object)) 
+    error ("\"%s\" is not an object file: %s", filename,
+	   bfd_errmsg (bfd_get_error ()));
+
+  for (section = pbfd->sections; section; section = section->next) 
+    {
+      if (bfd_get_section_flags (pbfd, section) & SEC_LOAD)
+	{
+	  bfd_vma	section_address;
+	  bfd_size_type section_size;
+	  file_ptr	fptr;
+	  const char   *section_name;
+
+	  section_name = bfd_get_section_name(pbfd, section);
+
+	  section_address = bfd_get_section_vma (pbfd, section);
+
+	  /* Adjust sections from a.out files, since they don't
+	     carry their addresses with.  */
+	  if (bfd_get_flavour (pbfd) == bfd_target_aout_flavour)
+	    {
+	      if (strcmp (section_name, ".text") == 0)
+		section_address = bfd_get_start_address (pbfd);
+	      else if (strcmp (section_name, ".data") == 0)
+		{
+		  /* Read the first 8 bytes of the data section.
+		     There should be the string 'DaTa' followed by
+		     a word containing the actual section address. */
+		  struct data_marker
+		  {
+		    char signature[4];	/* 'DaTa' */
+		    unsigned char sdata[4];	/* &sdata */
+		  } marker;
+		  bfd_get_section_contents (pbfd, section, &marker, 0,
+					    sizeof (marker));
+		  if (strncmp (marker.signature, "DaTa", 4) == 0)
+		    {
+		      if (TARGET_BYTE_ORDER == BIG_ENDIAN)
+			section_address = bfd_getb32 (marker.sdata);
+		      else
+			section_address = bfd_getl32 (marker.sdata);
+		    }
+		}
+	    }
+
+	  section_size = bfd_get_section_size_before_reloc (section);
+
+	  if (!quiet)
+	    printf_filtered ("[Loading section %s at 0x%x (%d bytes)]\n",
+			     bfd_get_section_name (pbfd, section),
+			     section_address,
+			     section_size);
+
+	  fptr = 0;
+	  while (section_size > 0)
+	    {
+	      int count;
+	      static char inds[] = "|/-\\";
+	      static int k = 0;
+
+	      QUIT;
+
+	      count = min (section_size, WRITESIZE);
+
+	      write_routine (pbfd, section, fptr, section_address, count);
+
+	      if (!quiet)
+		{
+		  printf_unfiltered ("\r%c", inds[k++ % 4]);
+		  gdb_flush (gdb_stdout);
+		}
+
+	      section_address += count;
+	      fptr += count;
+	      section_size -= count;
+	    }
+	}
+    }
+
+  if (!nostart)
+    {
+      entry = bfd_get_start_address (pbfd);
+
+      if (!quiet)
+	printf_unfiltered ("[Starting %s at 0x%x]\n", filename, entry);
+
+      start_routine (entry);
+    }
+
+  do_cleanups (old_chain);
+}
+
+static void
+sparclite_serial_start (entry)
+     bfd_vma entry;
+{
+  char buffer[5];
+  int i;
+
+  buffer[0] = 0x03;
+  store_unsigned_integer (buffer + 1, 4, entry);
+
+  debug_serial_write (remote_desc, buffer, 1 + 4);
+  i = readchar (remote_desc, remote_timeout);
+  if (i != 0x55)
+    error ("Can't start SparcLite.  Error code %d\n", i);
+}
+
+static void
+sparclite_serial_write (from_bfd, from_sec, from_addr, to_addr, len)
+     bfd *from_bfd;
+     asection *from_sec;
+     file_ptr from_addr;
+     bfd_vma to_addr;
+     int len;
+{
+  char buffer[4 + 4 + WRITESIZE]; /* addr + len + data */
+  unsigned char checksum;
+  int i;
+
+  store_unsigned_integer (buffer, 4, to_addr); /* Address */
+  store_unsigned_integer (buffer + 4, 4, len); /* Length */
+
+  bfd_get_section_contents (from_bfd, from_sec, buffer + 8, from_addr, len);
+
+  checksum = 0;
+  for (i = 0; i < len; i++)
+    checksum += buffer[8 + i];
+
+  i = send_resp (remote_desc, 0x01);
+
+  if (i != 0x5a)
+    error ("Bad response from load command (0x%x)", i);
+
+  debug_serial_write (remote_desc, buffer, 4 + 4 + len);
+  i = readchar (remote_desc, remote_timeout);
+
+  if (i != checksum)
+    error ("Bad checksum from load command (0x%x)", i);
+}
+
+#ifdef HAVE_SOCKETS
+
+static unsigned short
+calc_checksum (buffer, count)
+     unsigned char *buffer;
+     int count;
+{
+  unsigned short checksum;
+
+  checksum = 0;
+  for (; count > 0; count -= 2, buffer += 2)
+    checksum += (*buffer << 8) | *(buffer + 1);
+
+  if (count != 0)
+    checksum += *buffer << 8;
+
+  return checksum;
+}
+
+static void
+sparclite_udp_start (entry)
+     bfd_vma entry;
+{
+  unsigned char buffer[6];
+  int i;
+
+  buffer[0] = 0x3;
+  buffer[1] = 0;
+  buffer[2] = entry >> 24;
+  buffer[3] = entry >> 16;
+  buffer[4] = entry >> 8;
+  buffer[5] = entry;
+
+  send_udp_buf (udp_fd, buffer, 6); /* Send start addr */
+  i = recv_udp_buf (udp_fd, buffer, sizeof(buffer), -1); /* Get response */
+
+  if (i < 1 || buffer[0] != 0x55)
+    error ("Failed to take start address.");
+}
+
+static void
+sparclite_udp_write (from_bfd, from_sec, from_addr, to_addr, len)
+     bfd *from_bfd;
+     asection *from_sec;
+     file_ptr from_addr;
+     bfd_vma to_addr;
+     int len;
+{
+  unsigned char buffer[2000];
+  unsigned short checksum;
+  static int pkt_num = 0;
+  static unsigned long old_addr = -1;
+  int i;
+
+  while (1)
+    {
+      if (to_addr != old_addr)
+	{
+	  buffer[0] = 0x1;	/* Load command */
+	  buffer[1] = 0x1;	/* Loading address */
+	  buffer[2] = to_addr >> 24;
+	  buffer[3] = to_addr >> 16;
+	  buffer[4] = to_addr >> 8;
+	  buffer[5] = to_addr;
+
+	  checksum = 0;
+	  for (i = 0; i < 6; i++)
+	    checksum += buffer[i];
+	  checksum &= 0xff;
+
+	  send_udp_buf (udp_fd, buffer, 6);
+	  i = recv_udp_buf (udp_fd, buffer, sizeof buffer, -1);
+
+	  if (i < 1)
+	    error ("Got back short checksum for load addr.");
+
+	  if (checksum != buffer[0])
+	    error ("Got back bad checksum for load addr.");
+
+	  pkt_num = 0;		/* Load addr resets packet seq # */
+	  old_addr = to_addr;
+	}
+
+      bfd_get_section_contents (from_bfd, from_sec, buffer + 6, from_addr,
+				len);
+
+      checksum = calc_checksum (buffer + 6, len);
+
+      buffer[0] = 0x1;		/* Load command */
+      buffer[1] = 0x2;		/* Loading data */
+      buffer[2] = pkt_num >> 8;
+      buffer[3] = pkt_num;
+      buffer[4] = checksum >> 8;
+      buffer[5] = checksum;
+
+      send_udp_buf (udp_fd, buffer, len + 6);
+      i = recv_udp_buf (udp_fd, buffer, sizeof buffer, 3);
+
+      if (i == 0)
+	{
+	  fprintf_unfiltered (gdb_stderr, "send_data: timeout sending %d bytes to address 0x%x retrying\n", len, to_addr);
+	  continue;
+	}
+
+      if (buffer[0] != 0xff)
+	error ("Got back bad response for load data.");
+
+      old_addr += len;
+      pkt_num++;
+
+      return;
+    }
+}
+
+#endif /* HAVE_SOCKETS */
+
+static void
+sparclite_download (filename, from_tty)
+     char *filename;
+     int from_tty;
+{
+  if (!serial_flag)
+#ifdef HAVE_SOCKETS
+    download (remote_target_name, filename, from_tty, sparclite_udp_write,
+	      sparclite_udp_start);
+#else
+    abort ();			/* sparclite_open should prevent this! */
+#endif
+  else
+    download (remote_target_name, filename, from_tty, sparclite_serial_write,
+	      sparclite_serial_start);
+}
+
+/* Define the target subroutine names */
+
+static struct target_ops sparclite_ops ;
+
+static void 
+init_sparclite_ops(void)
+{
+  sparclite_ops.to_shortname =   "sparclite";		
+  sparclite_ops.to_longname =   "SPARClite remote target";
+  sparclite_ops.to_doc =   "Use a remote SPARClite target board via a serial line; using a gdb-specific protocol.\n\
+Specify the serial device it is connected to (e.g. /dev/ttya).";  
+  sparclite_ops.to_open =   sparclite_open;	
+  sparclite_ops.to_close =   sparclite_close;	
+  sparclite_ops.to_attach =   0;	
+  sparclite_ops.to_post_attach = NULL;
+  sparclite_ops.to_require_attach = NULL;
+  sparclite_ops.to_detach =   0;
+  sparclite_ops.to_require_detach = NULL;	
+  sparclite_ops.to_resume =   0;	
+  sparclite_ops.to_wait  =   0;
+  sparclite_ops.to_post_wait = NULL;		
+  sparclite_ops.to_fetch_registers  =   0;
+  sparclite_ops.to_store_registers  =   0;
+  sparclite_ops.to_prepare_to_store =   0;
+  sparclite_ops.to_xfer_memory  =   0;		
+  sparclite_ops.to_files_info  =   0;		
+  sparclite_ops.to_insert_breakpoint =   0;	
+  sparclite_ops.to_remove_breakpoint =   0;	
+  sparclite_ops.to_terminal_init  =   0;	
+  sparclite_ops.to_terminal_inferior =   0;	
+  sparclite_ops.to_terminal_ours_for_output =   0;
+  sparclite_ops.to_terminal_ours  =   0;		
+  sparclite_ops.to_terminal_info  =   0;		
+  sparclite_ops.to_kill  =   0;			
+  sparclite_ops.to_load  =   sparclite_download;
+  sparclite_ops.to_lookup_symbol =   0;		
+  sparclite_ops.to_create_inferior =   0;
+  sparclite_ops.to_post_startup_inferior = NULL;
+  sparclite_ops.to_acknowledge_created_inferior = NULL;
+  sparclite_ops.to_clone_and_follow_inferior = NULL;
+  sparclite_ops.to_post_follow_inferior_by_clone = NULL;
+  sparclite_ops.to_insert_fork_catchpoint = NULL;
+  sparclite_ops.to_remove_fork_catchpoint = NULL;
+  sparclite_ops.to_insert_vfork_catchpoint = NULL;
+  sparclite_ops.to_remove_vfork_catchpoint = NULL;
+  sparclite_ops.to_has_forked = NULL;
+  sparclite_ops.to_has_vforked = NULL;
+  sparclite_ops.to_can_follow_vfork_prior_to_exec = NULL;
+  sparclite_ops.to_post_follow_vfork = NULL;	
+  sparclite_ops.to_insert_exec_catchpoint = NULL;
+  sparclite_ops.to_remove_exec_catchpoint = NULL;
+  sparclite_ops.to_has_execd = NULL;
+  sparclite_ops.to_reported_exec_events_per_exec_call = NULL;
+  sparclite_ops.to_has_exited = NULL;
+  sparclite_ops.to_mourn_inferior =   0;	
+  sparclite_ops.to_can_run  =   0;		
+  sparclite_ops.to_notice_signals =   0;	
+  sparclite_ops.to_thread_alive  =   0;		
+  sparclite_ops.to_stop  =   0;
+  sparclite_ops.to_pid_to_exec_file = NULL;	
+  sparclite_ops.to_core_file_to_sym_file = NULL;		
+  sparclite_ops.to_stratum =   download_stratum;
+  sparclite_ops.DONT_USE =   0;			
+  sparclite_ops.to_has_all_memory =   0;	
+  sparclite_ops.to_has_memory =   0;		
+  sparclite_ops.to_has_stack =   0;		
+  sparclite_ops.to_has_registers =   0;		
+  sparclite_ops.to_has_execution =   0;		
+  sparclite_ops.to_sections =   0;		
+  sparclite_ops.to_sections_end =   0;		
+  sparclite_ops.to_magic =   OPS_MAGIC	;	
+} /* init_sparclite_ops */
+
+void
+_initialize_sparcl_tdep ()
+{
+  init_sparclite_ops() ;
+  add_target (&sparclite_ops);
+}