source: trunk/src/binutils/include/gdb/remote-sim.h@ 607

/* This file defines the interface between the simulator and gdb.

   Copyright 1993, 1994, 1996, 1997, 1998, 2000, 2002 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.  */

#if !defined (REMOTE_SIM_H)
#define REMOTE_SIM_H 1

#ifdef __cplusplus
extern "C" {
#endif

/* This file is used when building stand-alone simulators, so isolate this
   file from gdb.  */

/* Pick up CORE_ADDR_TYPE if defined (from gdb), otherwise use same value as
   gdb does (unsigned int - from defs.h).  */

#ifndef CORE_ADDR_TYPE
typedef unsigned int SIM_ADDR;
#else
typedef CORE_ADDR_TYPE SIM_ADDR;
#endif


/* Semi-opaque type used as result of sim_open and passed back to all
   other routines.  "desc" is short for "descriptor".
   It is up to each simulator to define `sim_state'.  */

typedef struct sim_state *SIM_DESC;


/* Values for `kind' arg to sim_open.  */

typedef enum {
  SIM_OPEN_STANDALONE, /* simulator used standalone (run.c) */
  SIM_OPEN_DEBUG       /* simulator used by debugger (gdb) */
} SIM_OPEN_KIND;


/* Return codes from various functions.  */

typedef enum {
  SIM_RC_FAIL = 0,
  SIM_RC_OK = 1
} SIM_RC;


/* The bfd struct, as an opaque type.  */

struct bfd;


/* Main simulator entry points.  */


/* Create a fully initialized simulator instance.

   (This function is called when the simulator is selected from the
   gdb command line.)

   KIND specifies how the simulator shall be used.  Currently there
   are only two kinds: stand-alone and debug.

   CALLBACK specifies a standard host callback (defined in callback.h).

   ABFD, when non NULL, designates a target program.  The program is
   not loaded.

   ARGV is a standard ARGV pointer such as that passed from the
   command line.  The syntax of the argument list is is assumed to be
   ``SIM-PROG { SIM-OPTION } [ TARGET-PROGRAM { TARGET-OPTION } ]''.
   The trailing TARGET-PROGRAM and args are only valid for a
   stand-alone simulator.

   On success, the result is a non NULL descriptor that shall be
   passed to the other sim_foo functions.  While the simulator
   configuration can be parameterized by (in decreasing precedence)
   ARGV's SIM-OPTION, ARGV's TARGET-PROGRAM and the ABFD argument, the
   successful creation of the simulator shall not dependent on the
   presence of any of these arguments/options.

   Hardware simulator: The created simulator shall be sufficiently
   initialized to handle, with out restrictions any client requests
   (including memory reads/writes, register fetch/stores and a
   resume).

   Process simulator: that process is not created until a call to
   sim_create_inferior.  FIXME: What should the state of the simulator
   be? */

SIM_DESC sim_open PARAMS ((SIM_OPEN_KIND kind, struct host_callback_struct *callback, struct bfd *abfd, char **argv));


/* Destory a simulator instance.

   QUITTING is non-zero if we cannot hang on errors.

   This may involve freeing target memory and closing any open files
   and mmap'd areas.  You cannot assume sim_kill has already been
   called. */

void sim_close PARAMS ((SIM_DESC sd, int quitting));


/* Load program PROG into the simulators memory.

   If ABFD is non-NULL, the bfd for the file has already been opened.