include/remote-sim.h

   1 /* This file defines the interface between the simulator and gdb.
   2    Copyright (C) 1993, 1994, 1996, 1997 Free Software Foundation, Inc.
   3
   4 This file is part of GDB.
   5
   6 This program is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2 of the License, or
   9 (at your option) any later version.
  10
  11 This program is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  19
  20 #if !defined (REMOTE_SIM_H)
  21 #define REMOTE_SIM_H 1
  22
  23 /* This file is used when building stand-alone simulators, so isolate this
  24    file from gdb.  */
  25
  26 /* Pick up CORE_ADDR_TYPE if defined (from gdb), otherwise use same value as
  27    gdb does (unsigned int - from defs.h).  */
  28
  29 #ifndef CORE_ADDR_TYPE
  30 typedef unsigned int SIM_ADDR;
  31 #else
  32 typedef CORE_ADDR_TYPE SIM_ADDR;
  33 #endif
  34
  35 /* Semi-opaque type used as result of sim_open and passed back to all
  36    other routines.  "desc" is short for "descriptor".
  37    It is up to each simulator to define `sim_state'.  */
  38
  39 typedef struct sim_state *SIM_DESC;
  40
  41 /* Values for `kind' arg to sim_open.  */
  42 typedef enum {
  43   SIM_OPEN_STANDALONE, /* simulator used standalone (run.c) */
  44   SIM_OPEN_DEBUG       /* simulator used by debugger (gdb) */
  45 } SIM_OPEN_KIND;
  46
  47 /* Return codes from various functions.  */
  48 typedef enum {
  49   SIM_RC_FAIL = 0,
  50   SIM_RC_OK = 1
  51 } SIM_RC;
  52
  53 /* Main simulator entry points.  */
  54
  55 /* Initialize the simulator.  This function is called when the simulator
  56    is selected from the gdb command line.
  57    KIND specifies how the simulator will be used.  Currently there are only
  58    two kinds: standalone and debug.
  59    ARGV is passed from the command line and can be used to select whatever
  60    run time options the simulator provides.
  61    ARGV is the standard NULL terminated array of pointers, with argv[0]
  62    being the program name.
  63    The result is a descriptor that must be passed back to the other sim_foo
  64    functions.  */
  65
  66 SIM_DESC sim_open PARAMS ((SIM_OPEN_KIND kind, char **argv));
  67
  68 /* Terminate usage of the simulator.  This may involve freeing target memory
  69    and closing any open files and mmap'd areas.  You cannot assume sim_kill
  70    has already been called.
  71    QUITTING is non-zero if we cannot hang on errors.  */
  72
  73 void sim_close PARAMS ((SIM_DESC sd, int quitting));
  74
  75 /* Load program PROG into the simulator.
  76    Return non-zero if you wish the caller to handle it
  77    (it is done this way because most simulators can use gr_load_image,
  78    but defining it as a callback seems awkward).  */
  79
  80 int sim_load PARAMS ((SIM_DESC sd, char *prog, int from_tty));
  81
  82 /* Prepare to run the simulated program.
  83    START_ADDRESS is, yes, you guessed it, the start address of the program.
  84    ARGV and ENV are NULL terminated lists of pointers.
  85    Gdb will set the start address via sim_store_register as well, but
  86    standalone versions of existing simulators are not set up to cleanly call
  87    sim_store_register, so the START_ADDRESS argument is there as a
  88    workaround.  */
  89
  90 void sim_create_inferior PARAMS ((SIM_DESC sd, SIM_ADDR start_address,
  91                                   char **argv, char **env));
  92
  93 /* Kill the running program.
  94    This may involve closing any open files and deleting any mmap'd areas.  */
  95
  96 void sim_kill PARAMS ((SIM_DESC sd));
  97
  98 /* Read LENGTH bytes of the simulated program's memory and store in BUF.
  99    Result is number of bytes read, or zero if error.  */
 100
 101 int sim_read PARAMS ((SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length));
 102
 103 /* Store LENGTH bytes from BUF in the simulated program's memory.
 104    Result is number of bytes write, or zero if error.  */
 105
 106 int sim_write PARAMS ((SIM_DESC sd, SIM_ADDR mem, unsigned char *buf, int length));
 107
 108 /* Fetch register REGNO and store the raw value in BUF.  */
 109
 110 void sim_fetch_register PARAMS ((SIM_DESC sd, int regno, unsigned char *buf));
 111
 112 /* Store register REGNO from BUF (in raw format).  */
 113
 114 void sim_store_register PARAMS ((SIM_DESC sd, int regno, unsigned char *buf));
 115
 116 /* Print some interesting information about the simulator.
 117    VERBOSE is non-zero for the wordy version.  */
 118
 119 void sim_info PARAMS ((SIM_DESC sd, int verbose));
 120
 121 /* Fetch why the program stopped.
 122    SIGRC will contain either the argument to exit() or the signal number.  */
 123
 124 enum sim_stop { sim_exited, sim_stopped, sim_signalled };
 125
 126 void sim_stop_reason PARAMS ((SIM_DESC sd, enum sim_stop *reason, int *sigrc));
 127
 128 /* Run (or resume) the program.  */
 129
 130 void sim_resume PARAMS ((SIM_DESC sd, int step, int siggnal));
 131
 132 /* Passthru for other commands that the simulator might support.
 133    If SD is NULL, the command is to be interpreted as refering to
 134    the global state, however the simulator defines that.  */
 135
 136 void sim_do_command PARAMS ((SIM_DESC sd, char *cmd));
 137
 138 /* Provide simulator with a standard host_callback_struct.
 139    If SD is NULL, the command is to be interpreted as refering to
 140    the global state, however the simulator defines that.  */
 141
 142 void sim_set_callbacks PARAMS ((SIM_DESC sd, struct host_callback_struct *));
 143
 144 #endif /* !defined (REMOTE_SIM_H) */