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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 Free Software Foundation, Inc.
+
+GDB is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY.  No author or distributor accepts responsibility to anyone
+for the consequences of using it or for whether it serves any
+particular purpose or works at all, unless he says so in writing.
+Refer to the GDB General Public License for full details.
+
+Everyone is granted permission to copy, modify and redistribute GDB,
+but only under the conditions described in the GDB General Public
+License.  A copy of this license is supposed to have been given to you
+along with GDB so you can know your rights and responsibilities.  It
+should be in a file named COPYING.  Among other things, the copyright
+notice and this notice must be preserved on all copies.
+
+In other words, go ahead and share GDB, but don't try to stop
+anyone else from sharing it farther.  Help stamp out software hoarding!
+*/
+
+/* 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;
+
+/* 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 stop_frame;
+
+/* Number of breakpoint it stopped at, or 0 if none.  */
+
+extern int stop_breakpoint;
+
+/* 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;
+
+/* 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 CORE_ADDR step_frame;
+
+/* 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;
+
+/* Save register contents here when about to pop a stack dummy frame.  */
+
+extern char stop_registers[REGISTER_BYTES];
+
+/* Nonzero if pc has been changed by the debugger
+   since the inferior stopped.  */
+
+extern int pc_changed;