Blasting old junk

1 files changed, 0 insertions, 1716 deletions

diff --git a/gdb/energize.c b/gdb/energize.c
index 88b442e..e69de29 100644
--- a/gdb/energize.c
+++ b/gdb/energize.c
@@ -1,1716 +0,0 @@
-/* Energize (formerly known as Cadillac) interface routines.
-   Copyright 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */
-
-#include "defs.h"
-#include "symtab.h"
-#include "inferior.h"
-#include "command.h"
-#include "bfd.h"
-#include "symfile.h"
-#include "objfiles.h"
-#include "target.h"
-#include <sys/types.h>
-#include <sys/time.h>
-#include <sys/param.h>
-#include "energize/connection.h"
-#include "energize/genericreq.h"
-#include "energize/debuggerreq.h"
-#include "energize/debuggerconn.h"
-#include "energize/ttyconn.h"
-#include <varargs.h>
-#include <sys/stat.h>
-#ifdef USG
-#include <sys/file.h>
-#endif
-#include <fcntl.h>
-#include <sys/filio.h>
-#include <setjmp.h>
-#include <signal.h>
-#include <sys/errno.h>
-#include <termios.h>
-#include <string.h>
-#ifdef NCR486
-#include <sys/stropts.h>
-#endif
-
-/* Non-zero means that we're doing the energize interface. */
-int energize = 0;
-
-/* Non-zero means we are reloading breakpoints, etc from the
-   Energize kernel, and we should suppress various messages */
-static int energize_reloading = 0;
-
-/* Connection block for debugger<=>kernel communications. */
-static Connection *conn = 0;
-
-/* fd for our socket to the kernel. */
-static int kerfd;
-
-/* The kernel's ID for this instance of the program. */
-static int program_id;
-
-static int instance_id;
-
-/* The fd for the pty associated with the inferior. */
-static int inferior_pty = -1;
-static int inferior_tty = -1;
-
-static int has_run = 0;
-
-extern int pgrp_inferior;
-
-extern char *source_path;
-
-/* The name of the executable file */
-static char *exec_file;
-
-/* Tell energize_command_line_input() where to get its text from */
-static int doing_breakcommands_message = 0;
-
-/* Stash command text here */
-static char *command_line_text = 0;
-static int command_line_length = 0;
-
-/* Flags returned by wait_for_events() */
-#define KERNEL_EVENT 1
-#define PTY_EVENT 2
-
-static void execute_command_1();
-
-
-/* This routine redirects the output of fputs_filtered to the kernel so that
-   the user can see what's going on in his debugger window. */
-
-void
-energize_fputs(ptr)
-     const char *ptr;
-{
-  if (conn)
-    CVWriteTranscriptInfo (conn, instance_id, (char *)ptr);
-  else
-    fputs (ptr, stdout);
-}
-
-void
-energize_query(query, args)
-     char *query;
-     va_list args;
-{
-  char buf[100];
-
-  if (!energize)
-    return;
-
-  vsprintf(buf, query, args);
-
-  CVWriteQueryInfo(conn,
-		   instance_id,
-		   CQueryConfirm,
-		   qno_unknown,
-		   buf,
-		   "");		/* transcript */
-}
-
-void
-energize_acknowledge_query(ack)
-     char *ack;
-{
-  CVWriteQueryInfo(conn,
-		   instance_id,
-		   CQueryAcknowleged,
-		   0,
-		   ack,
-		   "");		/* transcript */
-}
-
-/* Copy all data from the pty to the kernel. */
-
-static void
-pty_to_kernel()
-{
-  CTtyRequest *req;
-  char buf[1024];
-  int cc;
-
-  while (1)
-    {
-      cc = read(inferior_pty, buf, sizeof(buf));
-
-      if (cc == 0
-	  || (cc < 0
-	      && (errno == EWOULDBLOCK
-		  || errno == EAGAIN)))
-	break;
-
-      if (cc < 0)
-	{
-	  close(inferior_pty);
-	  inferior_pty = -1;
-	  perror("pty_to_kernel: pty read error");
-	  break;
-	}
-
-      req = CWriteTtyRequest(conn, TextIORType);
-      CWriteVstringLen(conn, buf, cc);
-      CWriteLength(conn);
-    }
-  CWriteRequestBuffer(conn);
-}
-
-/* Copy data from the kernel to the pty. */
-
-static void
-kernel_to_pty(data, len)
-     char *data;
-     int len;
-{
-  int cc;
-
-  cc = write(inferior_pty, data, len);
-
-  if (cc != len)
-    {
-      if (cc < 0)
-	{
-	  close(inferior_pty);
-	  inferior_pty = -1;
-	  perror("kernel_to_pty: pty write error");
-	  return;
-	}
-      printf("Couldn't write all the data to the pty, wanted %d, got %d\n",
-	     len, cc);
-    }
-}
-
-static char *
-full_filename(symtab)
-     struct symtab *symtab;
-{
-  int pathlen;
-  char *filename;
-
-  if (!symtab)
-    return NULL;
-
-  if (symtab->fullname)
-    return savestring(symtab->fullname, strlen(symtab->fullname));
-
-  if (symtab->filename[0] == '/')
-    return savestring(symtab->filename, strlen(symtab->filename));
-
-  if (symtab->dirname)
-    pathlen = strlen(symtab->dirname);
-  else
-    pathlen = 0;
-  if (symtab->filename)
-    pathlen += strlen(symtab->filename);
-
-  filename = xmalloc(pathlen+1);
-
-  if (symtab->dirname)
-    strcpy(filename, symtab->dirname);
-  else
-    *filename = '\000';
-  if (symtab->filename)
-    strcat(filename, symtab->filename);
-
-  return filename;
-}
-
-/* Tell the energize kernel how high the stack is so that frame numbers (which
-   are relative to the current stack height make sense.
-
-   Calculate the number of frames on the stack, and the number of subroutine
-   invocations that haven't changed since the last call to this routine.  The
-   second number is calculated by comparing the PCs of the current stack frames
-   to the PCs of the previous set of stack frames.  The screw here is that a
-   subroutine may call several different procedures, which means that the PC
-   in its frame changes, even though you are still in the same subroutine.  We
-   resolve this by converting the frames PC into the PC at the start of the
-   function (for efficiency, this is done only if the simple comparison test
-   fails). */
-
-struct pclist
-{
-  CORE_ADDR pc;
-  struct pclist *next;
-};
-
-/* Non-zero means that Energize kernel already knows how high the stack is. */
-static int stack_info_valid = 0;
-
-static void
-send_stack_info()
-{
-  struct pclist *pclist = 0, *pli, *opli;
-  static struct pclist *old_pclist;
-  struct frame_info *frame;
-  int height, similar;
-
-  if (stack_info_valid)
-    return;
-
-  height = 0;
-  similar = 0;
-
-/* First, calculate the stack height, and build the new pclist */
-
-  for (frame = get_current_frame();
-       frame != 0;
-       frame = get_prev_frame(frame))
-    {
-      (height)++;
-      pli = (struct pclist *)xmalloc(sizeof(struct pclist));
-
-      pli->pc = frame->pc;
-      pli->next = pclist;
-      pclist = pli;
-    }
-
-/* Now, figure out how much of the stack hasn't changed */
-
-  for (pli = pclist, opli = old_pclist;
-       pli != 0 && opli != 0;
-       pli = pli->next, opli = opli->next, (similar)++)
-    {
-      if ((pli->pc != opli->pc)
-	  && (get_pc_function_start(pli->pc)
-	      != get_pc_function_start(opli->pc)))
-	break;
-    }
-
-/* Free up all elements of the old pclist */
-
-  opli = old_pclist;
-
-  while (opli)
-    {
-      pli = opli->next;
-      free (opli);
-      opli = pli;
-    }
-
-  old_pclist = pclist;		/* Install the new pclist */
-
-  CVWriteStackSizeInfo(conn,
-		       instance_id,
-		       height,	/* Frame depth */
-		       CInnerFrameIs0,
-		       similar, /* Frame diff */
-		       ""	/* Transcript */
-		       );
-
-  stack_info_valid = 1;
-}
-
-/* Tell the Energize server about the file and line # that corresponds to pc,
-   and which stack frame level that pc corresponds to. */
-
-static void
-send_location(pc, frame_level)
-     CORE_ADDR pc;
-     int frame_level;
-{
-  char *funcname, *filename;
-  struct symtab_and_line sal;
-  struct symbol *symbol;
-
-  sal = find_pc_line(pc, 0);
-  symbol = find_pc_function(pc);
-
-  funcname = symbol ? symbol->name : "";
-  filename = full_filename(sal.symtab);
-
-  send_stack_info();
-
-  CVWriteStackFrameInfo(conn,
-			instance_id,
-			sal.line,
-			CFileLinePos,
-			frame_level,
-			funcname,
-			filename,
-			""	/* XXX ? transcript */
-			);
-  if (filename)
-    free(filename);
-}
-
-/* Tell the kernel where we are in the program, and what the stack looks like.
-   */
-
-static void
-send_status()
-{ 
-  char *funcname;
-  struct symbol *symbol;
-  static int sent_prog_inst = 0;
-
-  symbol = find_pc_function(stop_pc);
-  funcname = symbol ? symbol->name : "";
-
-  if (!has_run)
-    return;
-
-  if (inferior_pid == 0)	/* target has died */
-    {
-      CVWriteProgramTerminatedInfo(conn,
-				   instance_id,
-				   ""
-				   );
-      return;
-    }
-
-  if (!sent_prog_inst)
-    {
-      sent_prog_inst = 1;
-      CVWriteProgramInstanceInfo(conn,
-				 program_id,
-				 instance_id,
-				 "", /* hostname */
-				 "", /* arglist */
-				 ""
-				 );
-    }
-
-  send_location(stop_pc,
-		selected_frame_level); /* Had better be 0! */
-
-  CVWriteProgramStoppedInfo(conn,
-			    instance_id,
-			    0,	/* XXX - breakpoint # or signal # */
-			    CDebuggerCommand,
-			    funcname,
-			    ""	/* XXX ? transcript */
-			    );
-
-}
-
-/* Call this to output annotated function names.  Names will be demangled if
-   necessary.  arg_mode contains flags that are passed on to cplus_demangle. */
-
-void
-energize_annotate_function(funcname, arg_mode, level)
-     char *funcname;
-     int arg_mode;
-     int level;
-{
-  char *demangled_name = NULL;
-
-  if (funcname == NULL)
-    return;
-
-  if (demangle)
-    {
-      demangled_name = cplus_demangle(funcname, arg_mode);
-
-      if (demangled_name)
-	{
-	  funcname = demangled_name;
-	  printf_filtered("'");
-	}
-    }
-
-  send_stack_info();
-
-  if (level < 0) level = 0;
-
-  CVWriteBackTraceEntryInfo(conn,
-			    instance_id,
-			    level, /* frameNo */
-			    funcname);
-
-  if (demangled_name)
-    {
-      free(demangled_name);
-      printf_filtered("'");
-    }
-}
-
-/* Call this just prior to printing out the name & value of a variable.  This
-   tells the kernel where to annotate the output. */
-
-/* The args are:
-   expression - A text handle on what GDB can use to reference this value.
-   	        This can be a symbol name, or a convenience var, etc...
-   symbol - Used to determine the scope of the data.  May be NULL.
-   type - Determines if we have a pointer ref, and the print name of the type.
-          Used in ShowValue message.
-   valaddr - The address in target memory of the data.
-   field - The field name of the struct or union element being referenced.
-*/
-
-static char cum_expr[200];	/* Cumulative expression */
-static char *expr_stack[100] = {cum_expr}; /* Pointers to end of expressions */
-static char **last_expr = expr_stack;	/* Current expr stack pointer */
-
-void
-energize_start_variable_annotation(expression, symbol, type, valaddr, field)
-     char *expression;
-     struct symbol *symbol;
-     struct type *type;
-     CORE_ADDR valaddr;
-     char *field;
-{
-  int ref_type;
-  int stor_cl;
-  enum type_code type_code;
-  enum address_class sym_class;
-  char *type_cast;
-
-  if (!energize)
-    return;
-
-  send_stack_info();
-
-  strcpy(*last_expr++, expression);
-  *last_expr = *(last_expr-1) + strlen(expression);
-
-  switch (TYPE_CODE(type))
-    {
-    case TYPE_CODE_ARRAY:
-    case TYPE_CODE_STRUCT:
-    case TYPE_CODE_UNION:
-    case TYPE_CODE_ENUM:
-    case TYPE_CODE_INT:
-    case TYPE_CODE_FLT:
-      ref_type = CValueValueRef;
-      break;
-    case TYPE_CODE_PTR:
-      ref_type = CValuePointerRef;
-      break;
-    default:
-      ref_type = CValueUndefRef;
-      break;
-    }
-
-/* Make sure that pointer points at something we understand */
-
-  if (ref_type == CValuePointerRef)
-    switch (TYPE_CODE(TYPE_TARGET_TYPE(type)))
-      {
-      case TYPE_CODE_PTR:
-      case TYPE_CODE_ARRAY:
-      case TYPE_CODE_STRUCT:
-      case TYPE_CODE_UNION:
-      case TYPE_CODE_ENUM:
-      case TYPE_CODE_INT:
-      case TYPE_CODE_FLT:
-	break;
-      default:
-	ref_type = CValueUndefRef;
-	break;
-      }
-
-  if (symbol)
-    {
-      sym_class = SYMBOL_CLASS(symbol);
-
-      switch (sym_class)
-	{
-	case LOC_CONST:
-	case LOC_CONST_BYTES:
-	  stor_cl = CValueStorStaticConst;
-	  break;
-	case LOC_STATIC:
-	  stor_cl = CValueStorStaticVar;
-	  break;
-	case LOC_REGISTER:
-	case LOC_REGPARM:
-	  stor_cl = CValueStorRegister;
-	  break;
-	case LOC_ARG:
-	case LOC_REF_ARG:
-	case LOC_LOCAL:
-	case LOC_LOCAL_ARG:
-	  stor_cl = CValueStorLocalVar;
-	  break;
-	default:
-	  stor_cl = CValueStorUndef;
-	  break;
-	}
-    }
-  else
-    stor_cl = CValueStorUndef;
-
-  type_cast = TYPE_NAME(type);
-
-  CVWriteValueBeginInfo(conn,
-			instance_id,
-			valaddr,
-			ref_type,
-		        stor_cl,
-		        0,	/* XXX - frameno */
-			cum_expr,
-			field,
-			type_cast,
-			"");	/* transcript */
-}
-
-void
-energize_end_variable_annotation()
-{
-  if (!energize)
-    return;
-
-  last_expr--;			/* Pop the expr stack */
-  **last_expr = '\000';		/* Cut off the last part of the expr */
-
-  CVWriteValueEndInfo(conn,
-		      instance_id,
-		      "");	/* transcript */
-}
-
-/* Tell the kernel that the target is now running. */
-
-static void
-go_busy()
-{
-  CVWriteProgramBusyInfo(conn,
-			 instance_id,
-			 "");	/* XXX ? transcript */
-  CWriteRequestBuffer(conn);	/* Must take place synchronusly! */
-  stack_info_valid = 0;
-}
-
-
-void
-energize_symbol_file(objfile)
-     struct objfile *objfile;
-{
-  if (!energize)
-    return;
-
-  CVWriteSymbolTableInfo(conn,
-			 objfile->name,
-			 "");	/* Transcript */
-}
-
-/* execute_command_1(echo, queue, cmd, args) - echo - non-zero means echo the
-   command.  queue - non-zero means don't execute it now, just save it away for
-   later.  cmd - string containing printf control sequences.  args - list of
-   arguments needed by those control sequences.
- */
-
-/* Linked list of queued up commands */
-static struct command_line *queued_commands = 0;
-static struct command_line *last_queued_command = 0;
-
-/* Call this routine to save a command for later.  The command string is
-   copied into freshly malloc'ed memory. */
-
-static void
-queue_command(cmd)
-     char *cmd;
-{
-  char *buf;
-  struct command_line *cl;
-  unsigned long s;
-
-  s = (strlen(cmd) + 1) + 7 & ~(unsigned long)7;
-
-  buf = (char *)xmalloc(s + sizeof(struct command_line));
-  cl = (struct command_line *)(buf + s);
-  cl->next = 0;
-  cl->line = buf;
-
-  strncpy(cl->line, cmd, s);
-
-  if (queued_commands)
-    last_queued_command->next = cl;
-  else
-    queued_commands = cl;
-
-  last_queued_command = cl;
-}
-
-/* Call this procedure to take a command off of the command queue.  It returns
-   a pointer to a buf which the caller is responsible for freeing.  NULL is
-   returned if there are no commands queued. */
-
-static char *
-dequeue_command()
-{
-  struct command_line *cl;
-  char *cmd;
-
-  cl = queued_commands;
-
-  if (!cl)
-    return NULL;
-
-  queued_commands = cl->next;
-
-  return cl->line;
-}
-
-static void
-execute_command_1(va_alist)
-     va_dcl
-{
-  char buf[100];		/* XXX - make buf dynamic! */
-  
-  int echo;
-  int queue;
-  char *cmd;
-  va_list args;
-
-  va_start(args);
-  echo = va_arg(args, int);
-
-  queue = va_arg(args, int);
-  cmd = va_arg(args, char *);
-
-  vsprintf(buf, cmd, args);
-
-  if (queue)
-    queue_command(buf);
-  else
-    {
-      if (echo)
-	printf_filtered("%s\n", buf);
-      execute_command(buf, 1);
-    }
-
-  va_end(args);
-}
-
-#ifdef KERNEL_RECORD
-GDB_FILE *kerout;
-
-static int
-kernel_record(fd, ptr, num)
-     int fd, num;
-     char *ptr;
-
-{
-  fwrite(ptr, num, 1, kerout);
-  fflush(kerout);
-  return write(fd, ptr, num);
-}
-#endif
-
-void
-energize_condition_breakpoint(b)
-     struct breakpoint *b;
-{
-  if (energize)
-    CVWriteBreakConditionInfo(conn,
-			      instance_id,
-			      b->number,
-			      b->cond_string ? b->cond_string : "",
-			      "" /* transcript */
-			      );
-}
-
-void
-energize_commands_breakpoint(b)
-     struct breakpoint *b;
-{
-  struct command_line *l;
-
-  if (!energize)
-    return;
-
-  CVWriteBreakCommandBegInfo(conn,
-			     instance_id,
-			     b->number,
-			     ""); /* transcript */
-
-  for (l = b->commands; l; l = l->next)
-    CVWriteBreakCommandEntryInfo(conn,
-				 instance_id,
-				 l->line,
-				 ""); /* transcript */
-
-  CVWriteBreakCommandEndInfo(conn,
-			     instance_id,
-			     ""); /* transcript */
-}
-
-static void
-breakpoint_notify(b, action)
-     struct breakpoint *b;
-     int action;
-{
-  struct symbol *sym;
-  char *funcname = "";
-  char *filename;
-  char *included_in_filename = "";
-
-  if (!energize
-      || energize_reloading)	/* Don't notify energize about breakpoint changes, as it's about to send us
-				   a new bunch.  */
-    return;
-
-  if (b->type != bp_breakpoint)
-    return;
-
-  filename = full_filename(b->symtab);
-
-  sym = find_pc_function(b->address);
-  if (sym)
-    funcname = SYMBOL_NAME(sym);
-
-  CVWriteBreakpointInfo (conn,
-			 instance_id,
-			 b->number,
-			 b->line_number,
-			 CFileLinePos,
-			 CBreakOnInstrAccess,
-			 action,
-			 b->ignore_count,
-			 funcname,
-			 filename ? filename : "",
-			 "",	/* included_in_filename */
-			 ""	/* transcript */
-			 );
-
-  if (b->commands)
-    energize_commands_breakpoint(b);
-
-  energize_condition_breakpoint(b);
-
-  if (filename)
-    free(filename);
-}
-
-void
-energize_create_breakpoint(b)
-     struct breakpoint *b;
-{
-  breakpoint_notify(b, CEnableBreakpoint);
-}
-
-void
-energize_delete_breakpoint(b)
-     struct breakpoint *b;
-{
-  breakpoint_notify(b, CDeleteBreakpoint);
-}
-
-void
-energize_enable_breakpoint(b)
-     struct breakpoint *b;
-{
-  breakpoint_notify(b, CEnableBreakpoint);
-}
-
-void
-energize_disable_breakpoint(b)
-     struct breakpoint *b;
-{
-  breakpoint_notify(b, CDisableBreakpoint);
-}
-
-void
-energize_ignore_breakpoint(b)
-     struct breakpoint *b;
-{
-  breakpoint_notify(b, CBreakAttrUnchanged);
-}
-
-/* Open up a pty and its associated tty.  Return the fd of the tty. */
-
-#ifndef NCR486
-static void
-getpty()
-{
-  int n, ptyfd, ttyfd;
-  static char dev[30];
-  struct stat statbuf;
-  struct termios termios;
-
-#define HIGHPTY (('z' - 'p') * 16 - 1)
-
-  for (n = 0; n <= HIGHPTY; n++)
-    {
-      sprintf(dev, "/dev/pty%c%x", n/16 + 'p', n%16);
-      if (stat(dev, &statbuf))
-	break;
-      ptyfd = open(dev, O_RDWR);
-      if (ptyfd < 0)
-	continue;
-      sprintf(dev, "/dev/tty%c%x", n/16 + 'p', n%16);
-      ttyfd = open(dev, O_RDWR);
-      if (ttyfd < 0)
-	{
-	  close(ptyfd);
-	  continue;
-	}
-
-      /* Setup pty for non-blocking I/O.  Also make it give us a SIGIO when
-	 there's data available.  */
-
-      n = fcntl(ptyfd, F_GETFL, 0);
-      fcntl(ptyfd, F_SETFL, n|FNDELAY|FASYNC);
-      fcntl(ptyfd, F_SETOWN, getpid());
-
-      tcgetattr(ttyfd, &termios);
-      termios.c_oflag &= ~OPOST; /* No post-processing */
-      tcsetattr(ttyfd, TCSANOW, &termios);
-
-      inferior_pty = ptyfd;
-      inferior_tty = ttyfd;
-      return;
-    }
-
-  error ("getpty: can't get a pty\n");
-}
-#endif
-/* Alternate getpty for NCRs */
-
-#ifdef NCR486 /* LTL */
-#define MAX_PTM_TRY 16
-#define MAX_GRANTPT_TRY 4
-static void
-getpty()
-{
-  char *slavename;
-  extern char *ptsname();
-  int j, i;
-  int n, mfd, sfd;
-  struct stat statbuf; 
-  struct termios termios;
-
-  mfd = open("/dev/ptmx", O_RDWR); /* get the master */
-  if (mfd < 0)
-    error ("getpty: can't locate master\n");
-
-  if (grantpt(mfd) < 0)	/* get a slave */
-    error ("getpty: can't acquire slave");
-
-  unlockpt(mfd);
-
-  slavename = ptsname(mfd); /* get the slave device name */
-  if (!slavename)
-    error ("getpty: can't get a pts\n");
-
-  /* Drop controlling tty, become pgrp master */
-
-  if (setpgid(0, getppid()) == -1)
-    perror("setpgid() failed: ");
-
-  if (setsid() == -1)
-    perror("setsid() failed: ");
-
-  sfd = open(slavename, O_RDWR);
-  if (sfd < 0)
-    {
-      close(mfd);
-      error ("getpty: can't open slave\n");
-    }
-
-
-  if (ioctl(sfd, I_PUSH, "ptem")) perror ("getpty: ioctl I_PUSH fails");
-  if (ioctl(sfd, I_PUSH, "ldterm")) perror ("getpty: ioctl I_PUSH fails");
-
-  /* setup mty for non-blocking I/O. */
-
-  n = fcntl(mfd, F_GETFL);
-  if (n < 0)
-    perror ("getpty: fcntl F_GETFL failed");
-
-  if (fcntl(mfd, F_SETFL, n|O_NDELAY) <0)
-    perror("getpty: fcntl F_SETFL failed");
-
-  /* set up for async i/o - V.4 will send SIGPOLL when data available */
-
-  if (ioctl (mfd,  I_SETSIG, S_INPUT|S_RDNORM) < 0)
-    perror ("getpty: ioctl I_SETSIG failed");
-
-  if (tcgetattr(sfd, &termios))
-    perror("getpty: tcgetattr fails");
-  termios.c_oflag &= ~OPOST;	/* no post-processing */
-  if (tcsetattr(sfd, TCSANOW, &termios))
-    perror("getpty: tcsetattr fails");
-
-  inferior_pty=mfd;
-  inferior_tty=sfd;
-
-  return;
-} 
-
-#endif /* NCR486 */
-
-/* Examine a protocol packet from the driver. */
-
-static void
-kernel_dispatch(queue)
-     int queue;			/* Non-zero means we should just queue up
-				   commands. */
-{
-  register CHeader *head;
-
-  head = (CHeader *)CPeekNextRequest (conn);
-  if (head == NULL)
-    {
-      fprintf (stderr, "EOF on kernel read!\n");
-      exit (1);
-    }
-
-  if (head->reqType < LastTtyRequestRType)
-    {
-      CTtyRequest* req = CReadTtyRequest (conn);
-      switch (req->head.reqType)
-	{
-	case AcceptConnectionRType:
-	  /* Tell the rest of the world that energize is now set up */
-	  CSkipRequest (conn);
-	  break;
-
-	case RefuseConnectionRType:
-	  fprintf (stderr, "Debugger connection refused\n");
-	  exit (1);
-
-	case KillProgramRType:
-	  exit (0);
-
-	case TextIORType:
-	  {
-	    char *p;
-	    ReqLen len;
-
-	    p = CGetVstring(conn, &len);
-	    kernel_to_pty(p, len);
-	  }
-	  break;
-	default:
-	  fprintf(stderr, "Unknown Tty request type = %d\n",
-		  req->head.reqType);
-	  break;
-	}
-    }
-  else
-    {
-      CVDebuggerRequest *req = CVReadDebuggerRequest (conn);
-      if (!req)
-	{
-	  fprintf (stderr, "CVReadDebuggerRequest returned NULL, type = %d\n",
-		   head->reqType);
-	  exit(1);
-	}
-
-      switch (req->head.request->reqType)
-	{
-	case OpenProgramInstanceRType:
-	  {
-	    char *arglist, buf[100]; /* XXX - Make buf dynamic! */
-	    int arglen;
-	    /* XXX - should notice when program_id changes */
-	    arglist = req->openProgramInstance.progArglist.text;
-	    arglen = req->openProgramInstance.progArglist.byteLen;
-
-	    execute_command_1(1, queue, "break main");
-	    execute_command_1(1, queue, "enable delete $bpnum");
-	    if (arglist)
-	      {
-		execute_command_1(1, queue, "set args %.*s", arglen, arglist);
-	      }
-	    execute_command_1(1, queue, "run");
-	  }
-	  break;
-	case SearchPathRType:
-	  directory_command(req->searchPath.searchPath.text, 0);
-	  break;
-	case QuitDebuggerRType:
-	  execute_command_1(1, queue, "quit");
-	  break;
-	case RunRType:
-	  if (req->run.request->useArglist == CNewArglist)
-	    {
-	      execute_command_1(1, queue, "set args %.*s",
-				req->run.progArglist.byteLen,
-				req->run.progArglist.text);
-	    }
-	  execute_command_1(1, queue, "run");
-	  break;
-	case ContinueRType:
-	  execute_command_1(1, queue, "continue");
-	  break;
-	case StepRType:
-	  execute_command_1(1, queue, "step %d", req->step.request->stepCount);
-	  break;
-	case NextRType:
-	  execute_command_1(1, queue, "next %d", req->next.request->nextCount);
-	  break;
-	case ChangeStackFrameRType:
-	  switch (req->changeStackFrame.request->frameMovement)
-	    {
-	    case CToCurrentStackFrame:
-	      execute_command_1(1, queue, "frame %d",
-				req->changeStackFrame.request->frameNo);
-	      break;
-	    case CToInnerStackFrame:
-	      execute_command_1(1, queue, "down %d",
-				req->changeStackFrame.request->frameNo);
-	      break;
-	    case CToOuterStackFrame:
-	      execute_command_1(1, queue, "up %d",
-				req->changeStackFrame.request->frameNo);
-	      break;
-	    case CToAbsoluteStackFrame:
-	      execute_command_1(1, queue, "frame %d",
-				req->changeStackFrame.request->frameNo);
-	      break;
-	    }
-	  break;
-	case BackTraceRType:
-	  /* XXX - deal with limit??? */
-	  execute_command_1(1, queue, "backtrace");
-	  break;
-	case FinishRType:
-	  execute_command_1(1, queue, "finish");
-	  break;
-	case TerminateProgramRType:
-	  execute_command_1(1, queue, "kill");
-	  break;
-	case NewBreakpointRType:
-	  {
-	    char *tail;
-	    int skipped;
-
-	    tail = strrchr(req->newBreakpoint.fileName.text, '/');
-	    if (!tail)
-	      tail = req->newBreakpoint.fileName.text;
-	    else
-	      tail++;
-	    skipped = tail - req->newBreakpoint.fileName.text;
-	    execute_command_1(1, queue, "break %.*s:%d",
-			      req->newBreakpoint.fileName.byteLen - skipped,
-			      tail,
-			      req->newBreakpoint.request->fileLinePos);
-	  }
-	  break;
-	case StopRType:
-	  kill(-pgrp_inferior, SIGINT);
-	  break;
-	case UserInputRType:
-	  {
-	    char *text;
-	    long len;
-
-	    /* XXX - should really break command up into seperate lines
-	       and spoon-feed it to execute_command */
-
-	    text = req->userInput.userInput.text;
-	    len = req->userInput.userInput.byteLen;
-
-	    if (text[len-1] == '\n') text[len-1] = '\000';
-
-	    while (*text == ' ' || *text == '\t') text++;
-
-	    if (STREQ(text, "]*[")) /* XXX - What does this mean??? */
-	      break;
-
-	    if (*text != '\000')
-	      execute_command_1(0, queue, "%s", text);
-	    else
-	      print_prompt();	/* User just typed a blank line */
-	  }
-	  break;
-	case QueryResponseRType:
-	  {
-	    char *resp;
-
-	    if (req->queryResponse.request->response)
-	      resp = "y";
-	    else
-	      resp = "n";
-	    execute_command_1(1, 1, resp);
-	    printf_filtered("%s\n", resp);
-	  }
-	  break;
-	case ChangeBreakpointRType:
-	  switch (req->changeBreakpoint.request->breakpointAttr)
-	    {
-	    case CBreakAttrUnchanged:
-	      execute_command_1(1, queue, "ignore %d %d",
-				req->changeBreakpoint.request->breakpointId,
-				req->changeBreakpoint.request->ignoreCount);
-	      break;
-	    case CEnableBreakpoint:
-	      execute_command_1(1, queue, "enable %d",
-				req->changeBreakpoint.request->breakpointId);
-	      break;
-	    case CDisableBreakpoint:
-	      execute_command_1(1, queue, "disable %d",
-				req->changeBreakpoint.request->breakpointId);
-	      break;
-	    case CDeleteBreakpoint:
-	      execute_command_1(1, queue, "delete %d",
-				req->changeBreakpoint.request->breakpointId);
-	      break;
-	    case CEnableDisableBreakpoint:
-	      execute_command_1(1, queue, "enable once %d",
-				req->changeBreakpoint.request->breakpointId);
-	      break;
-	    case CEnableDeleteBreakpoint:
-	      execute_command_1(1, queue, "enable delete %d",
-				req->changeBreakpoint.request->breakpointId);
-	      break;
-	    default:
-	      printf_filtered("ChangeBreakpointRType: unknown breakpointAttr\n");
-	      printf_filtered("  breakpointAttr = %d\n",
-			      req->changeBreakpoint.request->breakpointAttr);
-	      printf_filtered("  breakpointId = %d\n",
-			      req->changeBreakpoint.request->breakpointId);
-	      printf_filtered("  breakpointType = %d\n",
-			      req->changeBreakpoint.request->breakpointType);
-	      printf_filtered("  ignoreCount = %d\n",
-			      req->changeBreakpoint.request->ignoreCount);
-	      break;
-	    }
-	  break;
-	case BreakConditionRType:
-	  execute_command_1(1, queue, "condition %d %.*s",
-			  req->breakCondition.request->breakpointId,
-			  req->breakCondition.condition.byteLen,
-			  req->breakCondition.condition.text);
-	  break;
-	case BreakCommandsRType:
-	  /* Put pointers to where energize_command_line_input() can find
-	     them. */
-	  doing_breakcommands_message = 1;
-	  command_line_length = req->breakCommands.commands.byteLen;
-	  command_line_text = req->breakCommands.commands.text;
-	  execute_command_1(1, queue, "commands %d",
-			    req->breakCommands.request->breakpointId);
-	  command_line_text = (char *)NULL;
-	  command_line_length = 0;
-	  doing_breakcommands_message = 0;
-	  break;
-	case ShowValueRType:
-	  {
-	    char expr[100], *p = expr;
-
-	    expr[0] = 0;
-
-	    if (req->showValue.request->ref_type == CValuePointerRef)
-	      strcat(expr, "* ");
-
-	    if (req->showValue.type_cast.byteLen)
-	      {
-		strcat(expr, "(");
-		strncat(expr, req->showValue.type_cast.text,
-			req->showValue.type_cast.byteLen);
-		strcat(expr, ") ");
-	      }
-
-	    if (req->showValue.field.byteLen)
-	      strcat(expr, "(");
-
-	    strncat(expr, req->showValue.expression.text,
-		    req->showValue.expression.byteLen);
-
-	    if (req->showValue.field.byteLen)
-	      {
-		strcat(expr, ")");
-
-		strncat(expr, req->showValue.field.text,
-			req->showValue.field.byteLen);
-	      }
-
-	    execute_command_1(1, queue, "print %s", expr);
-	  }
-	  break;
-	case SetValueRType:
-	  {
-	    char expr[100], *p = expr;
-
-	    expr[0] = 0;
-
-	    if (req->setValue.request->ref_type == CValuePointerRef)
-	      strcat(expr, "* ");
-
-#if 0
-	    if (req->setValue.type_cast.byteLen)
-	      {
-		strcat(expr, "(");
-		strncat(expr, req->setValue.type_cast.text,
-			req->setValue.type_cast.byteLen);
-		strcat(expr, ") ");
-	      }
-#endif
-	    if (req->setValue.field.byteLen)
-	      strcat(expr, "(");
-
-	    strncat(expr, req->setValue.expression.text,
-		    req->setValue.expression.byteLen);
-
-	    if (req->setValue.field.byteLen)
-	      {
-		strcat(expr, ")");
-
-		strncat(expr, req->setValue.field.text,
-			req->setValue.field.byteLen);
-	      }
-
-	    execute_command_1(1, queue, "print %s = (%s) %s", expr,
-			      req->setValue.type_cast.text,
-			      req->setValue.value.text);
-	  }
-	  break;
-	case DynamicLoadRType:
-	  {
-	    char *filename;
-
-	    filename = req->dynamicLoad.filenames.byteLen ?
-	      req->dynamicLoad.filenames.text : exec_file;
-
-	    switch (req->dynamicLoad.request->action)
-	      {
-	      case CDynamicLoadUpdateSymtab:
-		energize_reloading = 1;
-		execute_command_1(1, queue, "set confirm no");
-		execute_command_1(1, queue, "delete");
-/*		execute_command_1(1, queue, "set $bpnum=1");*/ /* Use this to reset breakpoint #s */
-		execute_command_1(1, queue, "exec-file %s", filename);
-		execute_command_1(1, queue, "symbol-file %s", filename);
-		execute_command_1(1, queue, "set confirm yes");
-		energize_reloading = 0;
-		break;
-	      case CDynamicLoadRestoreStart:
-		break;
-	      case CDynamicLoadRestoreEnd: /* Not used anymore??? */
-		printf_filtered("\n[Target has changed, automatic restoration of state has been done.]\n");
-		print_prompt();
-		break;
-	      default:
-		printf_filtered("DynamicLoadRType: unknown action=%d, filename=%s\n",
-				req->dynamicLoad.request->action,
-				req->dynamicLoad.filenames.text);
-		break;
-	      }
-	  }
-	  break;
-	default:
-	  fprintf(stderr, "Unknown Debugger request type = %d\n",
-		  req->head.request->reqType);
-	  break;
-	}
-      free (req); /* Should probably call CVFreeDebuggerRequest() here, but
-		     can't do so if interrupt level has mucked with req->
-		     request.  CVFreeDebuggerRequest() only ends up calling
-		     free() anyway! */
-    }
-}
-
-/* Return a bitmask indicating if the kernel or the pty did something
-   interesting.  Set poll to non-zero if you don't want to wait.  */
-
-static int
-wait_for_events(poll)
-     int poll;
-{
-  fd_set readfds;
-  int numfds;
-  int eventmask = 0;
-  static struct timeval tv = {0};
-
-  /* Output all pending requests. */
-  CWriteRequestBuffer(conn);
-
-  FD_ZERO(&readfds);
-
-  /* Wait till there's some activity from the kernel or the pty. */
-  do
-    {
-      FD_SET(kerfd, &readfds);
-
-      FD_SET(inferior_pty, &readfds);
-
-      if (poll)
-	numfds = select(sizeof(readfds)*8, &readfds, 0, 0, &tv);
-      else
-	numfds = select(sizeof(readfds)*8, &readfds, 0, 0, 0);
-    }
-  while (numfds <= 0 && !poll);
-
-  if (numfds == 0)
-    return 0;
-
-  if (FD_ISSET(inferior_pty, &readfds))
-    eventmask |= PTY_EVENT;
-
-  if (FD_ISSET(kerfd, &readfds))
-    eventmask |= KERNEL_EVENT;
-
-  return eventmask;
-}
-
-/* This is called from read_command_lines() to provide the text for breakpoint
-   commands, which is supplied in a BreakCommands message.  Each call to this
-   routine supplies a single line of text, with the newline removed. */
-
-/* This routine may be invoked in two different contexts.  In the first, it
-   is being called as a result of the BreakCommands message.  In this case,
-   all of the command text is immediately available.  In the second case, it is
-   called as a result of the user typing the 'command' command.  The command
-   text then needs to be glommed out of UserInput messages (and possibly other
-   messages as well).  The most 'straighforward' way of doing this is to
-   basically simulate the main loop, but just accumulate the command text
-   instead of sending it to execute_command().  */
-
-char *
-energize_command_line_input(prompt, repeat)
-     char *prompt;
-     int repeat;
-{
-  char *p;
-
-  if (!energize)
-    return command_line_input(prompt, repeat);
-
-  if (doing_breakcommands_message)
-    {
-      if (command_line_length <= 0)
-	return (char *)NULL;
-
-      p = command_line_text;
-
-      while (command_line_length-- > 0)
-	{
-	  if (*command_line_text == '\n')
-	    {
-	      *command_line_text = '\000';
-	      command_line_text++;
-	      break;
-	    }
-	  command_line_text++;
-	}
-
-      printf_filtered("%s\n", p);
-      return p;
-    }
-  else
-    {
-      /* We come here when the user has typed the 'command' or 'define' command
-	 to the GDB window.  We are basically deep inside of the 'command'
-	 command processing routine right now, and will be called to get a new
-	 line of input.  We expect that kernel_dispatch will queue up only one
-	 command at a time. */
-
-      int eventmask;
-      static char buf[100];
-      
-      eventmask = wait_for_events(0);
-
-      if (eventmask & PTY_EVENT)
-	pty_to_kernel();
-
-      if (eventmask & KERNEL_EVENT)
-	kernel_dispatch(1);	/* Queue up commands */
-
-/* Note that command has been echoed by the time we get here */
-
-      p = dequeue_command();
-
-      if (p)
-	{
-	  strncpy(buf, p, sizeof(buf));
-	  free(p);
-	  return buf;
-	}
-      else
-	return NULL;
-    }
-}
-
-/* Establish contact with the kernel. */
-
-void
-energize_initialize(energize_id, execarg)
-     char *energize_id;
-     char *execarg;
-{
-  CTtyRequest *req;
-  char *ctmp;
-  extern long strtol(char *str, char **ptr, int base);
-  char pathname[MAXPATHLEN];
-  int n;
-
-  if (!energize_id)
-    return;
-
-  if (!execarg) execarg = "";
-
-  exec_file = strdup(execarg);	/* Save for later */
-
-  printf("\ngdb-debugger pid=%d\n", getpid()); /* XXX - debugging only */
-  
-  /* First establish the connection with the kernel. */
-
-  kerfd = COpenClientSocket(NULL);
-  if (kerfd < 0) {
-    printf("COpenClientSocket() failed\n");
-    exit(1);
-  }
-
-  /* Setup for I/O interrupts when appropriate. */
-
-  signal(SIGIO, SIG_IGN);
-
-#ifdef NCR486
-  if (ioctl (kerfd,  I_SETSIG, S_INPUT|S_RDNORM) < 0)
-    perror ("getpty: ioctl I_SETSIG failed");
-#else
-  n = fcntl(kerfd, F_GETFL, 0);
-  fcntl(kerfd, F_SETFL, n|FASYNC);
-  fcntl(kerfd, F_SETOWN, getpid()); 
-#endif
-
-  /* Setup connection buffering. */
-
-  CSetSocketBufferSize (kerfd, 12000);
-
-  /* Generate a new connection control block. */
-
-  conn = NewConnection (0, kerfd, kerfd);
-  if (!conn) {
-    printf("NewConnection() failed\n");
-    exit(1);
-  }
-
-#ifdef KERNEL_RECORD
-  kerout = fopen("kernel.output", "+w");
-
-  CReadWriteHooks(conn, conn->previewMethod, conn->readMethod, kernel_record);
-#endif
-
-  /* Tell the kernel that we are the "debugger". */
-
-  req = CWriteTtyRequest (conn, QueryConnectionRType);
-  req->generic.queryconnection.major = 0;
-  req->generic.queryconnection.minor = 0;
-  req->generic.queryconnection.cadillacId1=strtol(energize_id, &ctmp, 16);
-  req->generic.queryconnection.cadillacId2 = strtol(++ctmp, NULL, 16);
-  req->generic.queryconnection.nProtocols = 1;
-  CWriteProtocol (conn, 0, 0, "debugger");
-  CWriteLength (conn);
-
-  /* Tell the kernel that we are actually running. */
-
-  /* KROCK ALERT!!!  The kernel doesn't really care about the arguments to
-     the program at all!  It only cares that argument 7 be the name of the
-     target program.  So, we just fill in the rest of the slots with
-     padding.  I hope the kernel never cares about this! */
-
-  req = CWriteTtyRequest (conn, RunningProgramRType);
-  req->runningprogram.argc = 8;
-  getcwd (pathname, MAXPATHLEN);
-  CWriteVstring0 (conn, pathname);
-
-  CWriteVstring0 (conn, "0");
-  CWriteVstring0 (conn, "1");
-  CWriteVstring0 (conn, "2");
-  CWriteVstring0 (conn, "3");
-  CWriteVstring0 (conn, "4");
-  CWriteVstring0 (conn, "5");
-  CWriteVstring0 (conn, "6");
-  CWriteVstring0 (conn, execarg);
-  CWriteLength (conn);
-
-  /* Tell the kernel our PID and all that */
-
-  program_id = 1;
-  CVWriteDebugProgramInfo(conn,
-			  getpid(),
-			  program_id,
-			  execarg,
-			  "");
-
-  /* Tell the rest of the world that Energize is now set up. */
-  energize = 1;
-
-  getpty();			/* Setup the pty */
-
-  /* Attach all GDB I/O to the pty */
-
-  dup2(inferior_tty, 0);
-  dup2(inferior_tty, 1);
-  dup2(inferior_tty, 2);
-}
-
-/* This is called from execute_command, and provides a wrapper around
-   various command routines in a place where both protocol messages and
-   user input both flow through.
-*/
-
-void
-energize_call_command(cmdblk, arg, from_tty)
-     struct cmd_list_element *cmdblk;
-     char *arg;
-     int from_tty;
-{
-  if (!energize)
-    {
-      (*cmdblk->function.cfunc) (arg, from_tty);
-      return;
-    }
-
-  if (cmdblk->class == class_run)
-    {
-      go_busy();
-      has_run = 1;
-      (*cmdblk->function.cfunc)(arg, from_tty);
-      send_status();
-    }
-  else
-    (*cmdblk->function.cfunc)(arg, from_tty);
-
-  if (STREQ(cmdblk->name, "up")
-      || STREQ(cmdblk->name, "down")
-      || STREQ(cmdblk->name, "frame"))
-    send_location(get_frame_info(selected_frame)->pc,
-		  selected_frame_level);
-  print_prompt();
-}
-
-void
-energize_new_process()
-{
-  instance_id = inferior_pid;
-}
-
-static void
-iosig(signo)
-     int signo;
-{
-  while (1)
-    {
-      int eventmask;
-
-      eventmask = wait_for_events(1);
-
-      if (eventmask == 0)
-	return;
-
-      if (eventmask & PTY_EVENT)
-	pty_to_kernel();
-
-      if (eventmask & KERNEL_EVENT)
-	kernel_dispatch(1);
-    }
-}
-
-int
-energize_wait(status)
-     int *status;
-{
-  int pid;
-  struct sigaction action;
-  static sigset_t nullsigmask = {0};
-
-  if (!energize)
-    return target_wait(status);
-
-#ifdef NCR486
-  action.sa_handler = iosig;
-  action.sa_mask = nullsigmask;
-  action.sa_flags = SA_RESTART;
-  sigaction(SIGIO, &action, NULL);
-#else
-  signal(SIGIO, iosig);
-#endif
-
-  pid = target_wait(status);
-
-  signal(SIGIO, SIG_IGN);
-  return pid;
-}
-
-int
-energize_shell_wait(status)
-     int *status;
-{
-  int pid;
-  struct sigaction action;
-  static sigset_t nullsigmask = {0};
-
-  if (!energize)
-    return wait(status);
-
-#ifdef NCR486
-  action.sa_handler = iosig;
-  action.sa_mask = nullsigmask;
-  action.sa_flags = SA_RESTART;
-  sigaction(SIGIO, &action, NULL);
-#else
-  signal(SIGIO, iosig);
-#endif
-
-  pid = wait(status);
-
-  signal(SIGIO, SIG_IGN);
-  return pid;
-}
-
-static void
-null_routine(arg)
-     int arg;
-{
-}
-
-/* All requests from the Energize kernel eventually end up here. */
-
-void
-energize_main_loop()
-{
-  CTtyRequest *req;
-  struct cleanup *old_chain;
-
-  doing_breakcommands_message = 0;
-
-/* We will come thru here any time there is an error, so send status if
-   necessary. */
-
-  send_status();
-
-  print_prompt();
-
-  /* The actual event loop! */
-
-  while (1)
-    {
-      int eventmask;
-      char *cmd;
-
-      old_chain = make_cleanup(null_routine, 0);
-
-/* First, empty out the command queue, then check for new requests. */
-
-      while (cmd = dequeue_command())
-	{
-	  execute_command_1(1, 0, cmd);
-	  free(cmd);
-	}
-
-      eventmask = wait_for_events(0);
-
-      if (eventmask & PTY_EVENT)
-	pty_to_kernel();
-
-      if (eventmask & KERNEL_EVENT)
-	kernel_dispatch(0);
-
-      bpstat_do_actions(&stop_bpstat);
-      do_cleanups(old_chain);
-    }
-}