Initial revision

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diff --git a/gdb/inferior.h b/gdb/inferior.h
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+/* Variables that describe the inferior process running under GDB:
+   Where it is, why it stopped, and how to step it.
+   Copyright (C) 1986, 1989 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+GDB 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 1, or (at your option)
+any later version.
+
+GDB 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 GDB; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* For bpstat.  */
+#include "breakpoint.h"
+
+/* For FRAME_ADDR.  */
+#include "frame.h"
+
+/*
+ * Structure in which to save the status of the inferior.  Save
+ * through "save_inferior_status", restore through
+ * "restore_inferior_status".
+ * This pair of routines should be called around any transfer of
+ * control to the inferior which you don't want showing up in your
+ * control variables.
+ */
+struct inferior_status {
+  int pc_changed;
+  int stop_signal;
+  int stop_pc;
+  FRAME_ADDR stop_frame_address;
+  bpstat stop_bpstat;
+  int stop_step;
+  int stop_stack_dummy;
+  int stopped_by_random_signal;
+  int trap_expected;
+  CORE_ADDR step_range_start;
+  CORE_ADDR step_range_end;
+  FRAME_ADDR step_frame_address;
+  int step_over_calls;
+  CORE_ADDR step_resume_break_address;
+  int stop_after_trap;
+  int stop_soon_quietly;
+  FRAME_ADDR selected_frame_address;
+  int selected_level;
+  char stop_registers[REGISTER_BYTES];
+  int breakpoint_proceeded;
+  int restore_stack_info;
+  int proceed_to_finish;
+};
+
+void save_inferior_status (), restore_inferior_status ();
+
+/* File name for default use for standard in/out in the inferior.  */
+
+extern char *inferior_io_terminal;
+
+/* Pid of our debugged inferior, or 0 if no inferior now.  */
+
+extern int inferior_pid;
+
+/* Character array containing an image of the inferior programs' registers.  */
+
+extern char registers[];
+
+extern void clear_proceed_status ();
+extern void start_inferior ();
+extern void proceed ();
+extern void kill_inferior ();
+extern void kill_inferior_fast ();
+extern void generic_mourn_inferior ();
+extern void terminal_ours ();
+extern void detach ();
+extern void run_stack_dummy ();
+extern CORE_ADDR read_pc ();
+extern void write_pc ();
+extern void wait_for_inferior ();
+extern void init_wait_for_inferior ();
+extern void close_exec_file ();
+extern void reopen_exec_file ();
+
+/* Last signal that the inferior received (why it stopped).  */
+
+extern int stop_signal;
+
+/* Address at which inferior stopped.  */
+
+extern CORE_ADDR stop_pc;
+
+/* Stack frame when program stopped.  */
+
+extern FRAME_ADDR stop_frame_address;
+
+/* Chain containing status of breakpoint(s) that we have stopped at.  */
+
+extern bpstat stop_bpstat;
+
+/* Flag indicating that a command has proceeded the inferior past the
+   current breakpoint.  */
+
+extern int breakpoint_proceeded;
+
+/* Nonzero if stopped due to a step command.  */
+
+extern int stop_step;
+
+/* Nonzero if stopped due to completion of a stack dummy routine.  */
+
+extern int stop_stack_dummy;
+
+/* Nonzero if program stopped due to a random (unexpected) signal in
+   inferior process.  */
+
+extern int stopped_by_random_signal;
+
+/* Range to single step within.
+   If this is nonzero, respond to a single-step signal
+   by continuing to step if the pc is in this range.  */
+
+extern CORE_ADDR step_range_start; /* Inclusive */
+extern CORE_ADDR step_range_end; /* Exclusive */
+
+/* Stack frame address as of when stepping command was issued.
+   This is how we know when we step into a subroutine call,
+   and how to set the frame for the breakpoint used to step out.  */
+
+extern FRAME_ADDR step_frame_address;
+
+/* 1 means step over all subroutine calls.
+   -1 means step over calls to undebuggable functions.  */
+
+extern int step_over_calls;
+
+/* If stepping, nonzero means step count is > 1
+   so don't print frame next time inferior stops
+   if it stops due to stepping.  */
+
+extern int step_multi;
+
+/* Nonzero if proceed is being used for a "finish" command or a similar
+   situation when stop_registers should be saved.  */
+
+extern int proceed_to_finish;
+
+/* Save register contents here when about to pop a stack dummy frame,
+   if-and-only-if proceed_to_finish is set.
+   Thus this contains the return value from the called function (assuming
+   values are returned in a register).  */
+
+extern char stop_registers[REGISTER_BYTES];
+
+/* Nonzero if pc has been changed by the debugger
+   since the inferior stopped.  */
+
+extern int pc_changed;
+
+/* Nonzero if the child process in inferior_pid was attached rather
+   than forked.  */
+
+int attach_flag;
+
+/* Possible values for CALL_DUMMY_LOCATION.  */
+#define ON_STACK 1
+#define BEFORE_TEXT_END 2
+#define AFTER_TEXT_END 3
+
+#if !defined (CALL_DUMMY_LOCATION)
+#if defined (CANNOT_EXECUTE_STACK)
+#define CALL_DUMMY_LOCATION BEFORE_TEXT_END
+#else /* Can execute stack.  */
+#define CALL_DUMMY_LOCATION ON_STACK
+#endif /* Can execute stack.  */
+#endif /* No CALL_DUMMY_LOCATION.  */
+
+/* Are we in a call dummy?  The code below which allows DECR_PC_AFTER_BREAK
+   below is for infrun.c, which may give the macro a pc without that
+   subtracted out.  */
+#if !defined (PC_IN_CALL_DUMMY)
+#if CALL_DUMMY_LOCATION == BEFORE_TEXT_END
+#define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
+  ((pc) >= text_end - CALL_DUMMY_LENGTH         \
+   && (pc) < text_end + DECR_PC_AFTER_BREAK)
+#else /* Not before text_end.  */
+#if CALL_DUMMY_LOCATION == AFTER_TEXT_END
+#define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
+  ((pc) >= text_end   \
+   && (pc) < text_end + CALL_DUMMY_LENGTH + DECR_PC_AFTER_BREAK)
+#else /* On stack.  */
+#define PC_IN_CALL_DUMMY(pc, sp, frame_address) \
+  ((sp) INNER_THAN (pc) && (pc) INNER_THAN (frame_address))
+#endif /* On stack.  */
+#endif /* Not before text_end.  */
+#endif /* No PC_IN_CALL_DUMMY.  */