* cadillac.c, cadillac-patches: Rename to energize.c and

energize-patches.  Change all routines and variables named
'cadillac*' to 'energize*'.  Create new file called energize.h to
hold all interface declarations.

1 files changed, 1509 insertions, 0 deletions

diff --git a/gdb/energize.c b/gdb/energize.c
new file mode 100644
index 0000000..80048d4
--- /dev/null
+++ b/gdb/energize.c
@@ -0,0 +1,1509 @@
+/* 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 <sys/types.h>
+#include <sys/time.h>
+#include <sys/param.h>
+#include <connection.h>
+#include <genericreq.h>
+#include <debuggerreq.h>
+#include <debuggerconn.h>
+#include <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>
+
+/* Non-zero means that we're doing the energize interface. */
+int energize = 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;
+
+char **pprompt;			/* Pointer to pointer to prompt */
+
+/* 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
+
+
+/* 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))
+	break;
+
+      if (cc < 0)
+	{
+	  close(inferior_pty);
+	  inferior_pty = -1;
+	  perror("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("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->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;
+  FRAME 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 kernel where we are in the program, and what the stack looks like.
+   */
+
+static void
+send_status()
+{
+  static int linecount = 48;
+  struct symtab_and_line sal;
+  struct symbol *symbol;
+  char *funcname, *filename;
+  static int sent_prog_inst = 0;
+
+  if (!has_run)
+    return;
+
+  if (inferior_pid == 0)	/* target has died */
+    {
+      CVWriteProgramTerminatedInfo(conn,
+				   instance_id,
+				   ""
+				   );
+      return;
+    }
+
+  sal = find_pc_line(stop_pc, 0);
+  symbol = find_pc_function(stop_pc);
+
+  funcname = symbol ? symbol->name : "";
+  filename = full_filename(sal.symtab);
+
+  if (!sent_prog_inst)
+    {
+      sent_prog_inst = 1;
+      CVWriteProgramInstanceInfo(conn,
+				 program_id,
+				 instance_id,
+				 "", /* hostname */
+				 "", /* arglist */
+				 ""
+				 );
+    }
+
+  send_stack_info();
+
+  CVWriteStackFrameInfo(conn,
+			instance_id,
+			sal.line,
+			CFileLinePos,
+			0,	/* XXX - frame # */
+			funcname,
+			filename,
+			""	/* XXX ? transcript */
+			);
+
+  CVWriteProgramStoppedInfo(conn,
+			    instance_id,
+			    0,	/* XXX - breakpoint # or signal # */
+			    CDebuggerCommand,
+			    funcname,
+			    ""	/* XXX ? transcript */
+			    );
+
+  if (filename)
+    free(filename);
+}
+
+/* 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;
+{
+  extern int demangle;
+  char *demangled_name = NULL;
+
+  if (funcname == NULL)
+    return;
+
+  if (demangle)
+    {
+      demangled_name = cplus_demangle(funcname, arg_mode);
+
+      if (demangled_name)
+	funcname = demangled_name;
+    }
+
+  send_stack_info();
+
+  if (level < 0) level = 0;
+
+  CVWriteBackTraceEntryInfo(conn,
+			    instance_id,
+			    level, /* frameNo */
+			    funcname);
+
+  if (demangled_name)
+    free(demangled_name);
+}
+
+/* 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
+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)
+    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. */
+
+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");
+}
+
+/* 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 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:
+	  killpg(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 (strcmp(text, "]*[") == 0) /* 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;
+	default:
+	  fprintf(stderr, "Unknown 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);
+      if (inferior_pty > 0)
+	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 (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 = "";
+
+  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. */
+
+  n = fcntl(kerfd, F_GETFL, 0);
+  fcntl(kerfd, F_SETFL, n|FASYNC);
+  fcntl(kerfd, F_SETOWN, getpid());
+
+  /* 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;
+  getwd (pathname);
+  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;
+
+  setsid();			/* Drop controlling tty, become pgrp master */
+  getpty();			/* Setup the pty */
+  dup2(inferior_tty, 0);	/* Attach all GDB I/O to the pty */
+  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);
+
+  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;
+
+  if (!energize)
+    return wait(status);
+
+  signal(SIGIO, iosig);
+
+  pid = wait(status);
+
+  signal(SIGIO, SIG_DFL);
+  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);
+    }
+}