sim/common/sim-base.h

   1 /* Simulator pseudo baseclass.
   2
   3    Copyright 1997, 1998, 2003 Free Software Foundation, Inc.
   4
   5    Contributed by Cygnus Support.
   6
   7 This file is part of GDB, the GNU debugger.
   8
   9 This program is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 2, or (at your option)
  12 any later version.
  13
  14 This program is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 You should have received a copy of the GNU General Public License along
  20 with this program; if not, write to the Free Software Foundation, Inc.,
  21 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  22
  23
  24 /* Simulator state pseudo baseclass.
  25
  26    Each simulator is required to have the file ``sim-main.h''.  That
  27    file includes ``sim-basics.h'', defines the base type ``sim_cia''
  28    (the data type that contains complete current instruction address
  29    information), include ``sim-base.h'':
  30
  31      #include "sim-basics.h"
  32      typedef address_word sim_cia;
  33      /-* If `sim_cia' is not an integral value (e.g. a struct), define
  34          CIA_ADDR to return the integral value.  *-/
  35      /-* #define CIA_ADDR(cia) (...) *-/
  36      #include "sim-base.h"
  37
  38    finally, two data types `struct _sim_cpu' and `struct sim_state'
  39    are defined:
  40
  41      struct _sim_cpu {
  42         ... simulator specific members ...
  43         sim_cpu_base base;
  44      };
  45
  46      struct sim_state {
  47        sim_cpu cpu[MAX_NR_PROCESSORS];
  48      #if (WITH_SMP)
  49      #define STATE_CPU(sd,n) (&(sd)->cpu[n])
  50      #else
  51      #define STATE_CPU(sd,n) (&(sd)->cpu[0])
  52      #endif
  53        ... simulator specific members ...
  54        sim_state_base base;
  55      };
  56
  57    Note that `base' appears last.  This makes `base.magic' appear last
  58    in the entire struct and helps catch miscompilation errors. */
  59
  60
  61 #ifndef SIM_BASE_H
  62 #define SIM_BASE_H
  63
  64 /* Pre-declare certain types. */
  65
  66 /* typedef <target-dependant> sim_cia; */
  67 #ifndef NULL_CIA
  68 #define NULL_CIA ((sim_cia) 0)
  69 #endif
  70 /* Return the current instruction address as a number.
  71    Some targets treat the current instruction address as a struct
  72    (e.g. for delay slot handling).  */
  73 #ifndef CIA_ADDR
  74 #define CIA_ADDR(cia) (cia)
  75 #endif
  76 #ifndef INVALID_INSTRUCTION_ADDRESS
  77 #define INVALID_INSTRUCTION_ADDRESS ((address_word)0 - 1)
  78 #endif
  79
  80 typedef struct _sim_cpu sim_cpu;
  81
  82 #include "sim-module.h"
  83
  84 #include "sim-trace.h"
  85 #include "sim-core.h"
  86 #include "sim-events.h"
  87 #include "sim-profile.h"
  88 #ifdef SIM_HAVE_MODEL
  89 #include "sim-model.h"
  90 #endif
  91 #include "sim-io.h"
  92 #include "sim-engine.h"
  93 #include "sim-watch.h"
  94 #include "sim-memopt.h"
  95 #include "sim-cpu.h"
  96
  97 /* Global pointer to current state while sim_resume is running.
  98    On a machine with lots of registers, it might be possible to reserve
  99    one of them for current_state.  However on a machine with few registers
 100    current_state can't permanently live in one and indirecting through it
 101    will be slower [in which case one can have sim_resume set globals from
 102    current_state for faster access].
 103    If CURRENT_STATE_REG is defined, it means current_state is living in
 104    a global register.  */
 105
 106
 107 #ifdef CURRENT_STATE_REG
 108 /* FIXME: wip */
 109 #else
 110 extern struct sim_state *current_state;
 111 #endif
 112
 113
 114 /* The simulator may provide different (and faster) definition.  */
 115 #ifndef CURRENT_STATE
 116 #define CURRENT_STATE current_state
 117 #endif
 118
 119
 120 typedef struct {
 121
 122   /* Simulator's argv[0].  */
 123   const char *my_name;
 124 #define STATE_MY_NAME(sd) ((sd)->base.my_name)
 125
 126   /* Who opened the simulator.  */
 127   SIM_OPEN_KIND open_kind;
 128 #define STATE_OPEN_KIND(sd) ((sd)->base.open_kind)
 129
 130   /* The host callbacks.  */
 131   struct host_callback_struct *callback;
 132 #define STATE_CALLBACK(sd) ((sd)->base.callback)
 133
 134   /* The type of simulation environment (user/operating).  */
 135   enum sim_environment environment;
 136 #define STATE_ENVIRONMENT(sd) ((sd)->base.environment)
 137
 138 #if 0 /* FIXME: Not ready yet.  */
 139   /* Stuff defined in sim-config.h.  */
 140   struct sim_config config;
 141 #define STATE_CONFIG(sd) ((sd)->base.config)
 142 #endif
 143
 144   /* List of installed module `init' handlers.  */
 145   struct module_list *modules;
 146 #define STATE_MODULES(sd) ((sd)->base.modules)
 147
 148   /* Supported options.  */
 149   struct option_list *options;
 150 #define STATE_OPTIONS(sd) ((sd)->base.options)
 151
 152   /* Non-zero if -v specified.  */
 153   int verbose_p;
 154 #define STATE_VERBOSE_P(sd) ((sd)->base.verbose_p)
 155
 156   /* Non cpu-specific trace data.  See sim-trace.h.  */
 157   TRACE_DATA trace_data;
 158 #define STATE_TRACE_DATA(sd) (& (sd)->base.trace_data)
 159
 160   /* If non NULL, the BFD architecture specified on the command line */
 161   const struct bfd_arch_info *architecture;
 162 #define STATE_ARCHITECTURE(sd) ((sd)->base.architecture)
 163
 164   /* If non NULL, the bfd target specified on the command line */
 165   const char *target;
 166 #define STATE_TARGET(sd) ((sd)->base.target)
 167
 168   /* In standalone simulator, this is the program's arguments passed
 169      on the command line.  */
 170   char **prog_argv;
 171 #define STATE_PROG_ARGV(sd) ((sd)->base.prog_argv)
 172
 173   /* The program's bfd.  */
 174   struct bfd *prog_bfd;
 175 #define STATE_PROG_BFD(sd) ((sd)->base.prog_bfd)
 176
 177   /* Symbol table for prog_bfd */
 178   struct bfd_symbol **prog_syms;
 179 #define STATE_PROG_SYMS(sd) ((sd)->base.prog_syms)
 180
 181   /* The program's text section.  */
 182   struct bfd_section *text_section;
 183   /* Starting and ending text section addresses from the bfd.  */
 184   SIM_ADDR text_start, text_end;
 185 #define STATE_TEXT_SECTION(sd) ((sd)->base.text_section)
 186 #define STATE_TEXT_START(sd) ((sd)->base.text_start)
 187 #define STATE_TEXT_END(sd) ((sd)->base.text_end)
 188
 189   /* Start address, set when the program is loaded from the bfd.  */
 190   SIM_ADDR start_addr;
 191 #define STATE_START_ADDR(sd) ((sd)->base.start_addr)
 192
 193   /* Size of the simulator's cache, if any.
 194      This is not the target's cache.  It is the cache the simulator uses
 195      to process instructions.  */
 196   unsigned int scache_size;
 197 #define STATE_SCACHE_SIZE(sd) ((sd)->base.scache_size)
 198
 199   /* FIXME: Move to top level sim_state struct (as some struct)?  */
 200 #ifdef SIM_HAVE_FLATMEM
 201   unsigned int mem_size;
 202 #define STATE_MEM_SIZE(sd) ((sd)->base.mem_size)
 203   unsigned int mem_base;
 204 #define STATE_MEM_BASE(sd) ((sd)->base.mem_base)
 205   unsigned char *memory;
 206 #define STATE_MEMORY(sd) ((sd)->base.memory)
 207 #endif
 208
 209   /* core memory bus */
 210 #define STATE_CORE(sd) (&(sd)->base.core)
 211   sim_core core;
 212
 213   /* Record of memory sections added via the memory-options interface.  */
 214 #define STATE_MEMOPT(sd) ((sd)->base.memopt)
 215   sim_memopt *memopt;
 216
 217   /* event handler */
 218 #define STATE_EVENTS(sd) (&(sd)->base.events)
 219   sim_events events;
 220
 221   /* generic halt/resume engine */
 222   sim_engine engine;
 223 #define STATE_ENGINE(sd) (&(sd)->base.engine)
 224
 225   /* generic watchpoint support */
 226   sim_watchpoints watchpoints;
 227 #define STATE_WATCHPOINTS(sd) (&(sd)->base.watchpoints)
 228
 229 #if WITH_HW
 230   struct sim_hw *hw;
 231 #define STATE_HW(sd) ((sd)->base.hw)
 232 #endif
 233
 234   /* Should image loads be performed using the LMA or VMA?  Older
 235      simulators use the VMA while newer simulators prefer the LMA. */
 236   int load_at_lma_p;
 237 #define STATE_LOAD_AT_LMA_P(SD) ((SD)->base.load_at_lma_p)
 238
 239   /* Marker for those wanting to do sanity checks.
 240      This should remain the last member of this struct to help catch
 241      miscompilation errors.  */
 242   int magic;
 243 #define SIM_MAGIC_NUMBER 0x4242
 244 #define STATE_MAGIC(sd) ((sd)->base.magic)
 245 } sim_state_base;
 246
 247 /* Functions for allocating/freeing a sim_state.  */
 248 SIM_DESC sim_state_alloc PARAMS ((SIM_OPEN_KIND kind, host_callback *callback));
 249 void sim_state_free PARAMS ((SIM_DESC));
 250
 251 #endif /* SIM_BASE_H */