sim/common/sim-base.h

   1 /* Simulator pseudo baseclass.
   2
   3    Copyright 1997-2015 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 3 of the License, or
  12 (at your option) 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
  20 along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22
  23 /* Simulator state pseudo baseclass.
  24
  25    Each simulator is required to have the file ``sim-main.h''.  That
  26    file includes ``sim-basics.h'', defines the base type ``sim_cia''
  27    (the data type that contains complete current instruction address
  28    information), include ``sim-base.h'':
  29
  30      #include "sim-basics.h"
  31      /-* If `sim_cia' is not an integral value (e.g. a struct), define
  32          CIA_ADDR to return the integral value.  *-/
  33      /-* typedef struct {...} sim_cia; *-/
  34      /-* #define CIA_ADDR(cia) (...) *-/
  35      #include "sim-base.h"
  36
  37    finally, two data types `struct _sim_cpu' and `struct sim_state'
  38    are defined:
  39
  40      struct _sim_cpu {
  41         ... simulator specific members ...
  42         sim_cpu_base base;
  43      };
  44
  45      struct sim_state {
  46        sim_cpu *cpu[MAX_NR_PROCESSORS];
  47        ... simulator specific members ...
  48        sim_state_base base;
  49      };
  50
  51    Note that `base' appears last.  This makes `base.magic' appear last
  52    in the entire struct and helps catch miscompilation errors. */
  53
  54
  55 #ifndef SIM_BASE_H
  56 #define SIM_BASE_H
  57
  58 /* Pre-declare certain types. */
  59
  60 /* typedef <target-dependant> sim_cia; */
  61 #ifndef NULL_CIA
  62 #define NULL_CIA ((sim_cia) 0)
  63 #endif
  64 /* Return the current instruction address as a number.
  65    Some targets treat the current instruction address as a struct
  66    (e.g. for delay slot handling).  */
  67 #ifndef CIA_ADDR
  68 #define CIA_ADDR(cia) (cia)
  69 typedef address_word sim_cia;
  70 #endif
  71 #ifndef INVALID_INSTRUCTION_ADDRESS
  72 #define INVALID_INSTRUCTION_ADDRESS ((address_word)0 - 1)
  73 #endif
  74
  75 /* TODO: Probably should just delete SIM_CPU.  */
  76 typedef struct _sim_cpu SIM_CPU;
  77 typedef struct _sim_cpu sim_cpu;
  78
  79 #include "sim-module.h"
  80
  81 #include "sim-trace.h"
  82 #include "sim-core.h"
  83 #include "sim-events.h"
  84 #include "sim-profile.h"
  85 #include "sim-model.h"
  86 #include "sim-io.h"
  87 #include "sim-engine.h"
  88 #include "sim-watch.h"
  89 #include "sim-memopt.h"
  90 #include "sim-cpu.h"
  91
  92 /* Global pointer to current state while sim_resume is running.
  93    On a machine with lots of registers, it might be possible to reserve
  94    one of them for current_state.  However on a machine with few registers
  95    current_state can't permanently live in one and indirecting through it
  96    will be slower [in which case one can have sim_resume set globals from
  97    current_state for faster access].
  98    If CURRENT_STATE_REG is defined, it means current_state is living in
  99    a global register.  */
 100
 101
 102 #ifdef CURRENT_STATE_REG
 103 /* FIXME: wip */
 104 #else
 105 extern struct sim_state *current_state;
 106 #endif
 107
 108
 109 /* The simulator may provide different (and faster) definition.  */
 110 #ifndef CURRENT_STATE
 111 #define CURRENT_STATE current_state
 112 #endif
 113
 114
 115 /* We require all sims to dynamically allocate cpus.  See comment up top about
 116    struct sim_state.  */
 117 #if (WITH_SMP)
 118 # define STATE_CPU(sd, n) ((sd)->cpu[n])
 119 #else
 120 # define STATE_CPU(sd, n) ((sd)->cpu[0])
 121 #endif
 122
 123
 124 typedef struct {
 125
 126   /* Simulator's argv[0].  */
 127   const char *my_name;
 128 #define STATE_MY_NAME(sd) ((sd)->base.my_name)
 129
 130   /* Who opened the simulator.  */
 131   SIM_OPEN_KIND open_kind;
 132 #define STATE_OPEN_KIND(sd) ((sd)->base.open_kind)
 133
 134   /* The host callbacks.  */
 135   struct host_callback_struct *callback;
 136 #define STATE_CALLBACK(sd) ((sd)->base.callback)
 137
 138   /* The type of simulation environment (user/operating).  */
 139   enum sim_environment environment;
 140 #define STATE_ENVIRONMENT(sd) ((sd)->base.environment)
 141
 142 #if 0 /* FIXME: Not ready yet.  */
 143   /* Stuff defined in sim-config.h.  */
 144   struct sim_config config;
 145 #define STATE_CONFIG(sd) ((sd)->base.config)
 146 #endif
 147
 148   /* List of installed module `init' handlers.  */
 149   struct module_list *modules;
 150 #define STATE_MODULES(sd) ((sd)->base.modules)
 151
 152   /* Supported options.  */
 153   struct option_list *options;
 154 #define STATE_OPTIONS(sd) ((sd)->base.options)
 155
 156   /* Non-zero if -v specified.  */
 157   int verbose_p;
 158 #define STATE_VERBOSE_P(sd) ((sd)->base.verbose_p)
 159
 160   /* Non cpu-specific trace data.  See sim-trace.h.  */
 161   TRACE_DATA trace_data;
 162 #define STATE_TRACE_DATA(sd) (& (sd)->base.trace_data)
 163
 164   /* If non NULL, the BFD architecture specified on the command line */
 165   const struct bfd_arch_info *architecture;
 166 #define STATE_ARCHITECTURE(sd) ((sd)->base.architecture)
 167
 168   /* If non NULL, the bfd target specified on the command line */
 169   const char *target;
 170 #define STATE_TARGET(sd) ((sd)->base.target)
 171
 172   /* In standalone simulator, this is the program's arguments passed
 173      on the command line.  */
 174   char **prog_argv;
 175 #define STATE_PROG_ARGV(sd) ((sd)->base.prog_argv)
 176
 177   /* The program's bfd.  */
 178   struct bfd *prog_bfd;
 179 #define STATE_PROG_BFD(sd) ((sd)->base.prog_bfd)
 180
 181   /* Symbol table for prog_bfd */
 182   struct bfd_symbol **prog_syms;
 183 #define STATE_PROG_SYMS(sd) ((sd)->base.prog_syms)
 184
 185   /* The program's text section.  */
 186   struct bfd_section *text_section;
 187   /* Starting and ending text section addresses from the bfd.  */
 188   bfd_vma text_start, text_end;
 189 #define STATE_TEXT_SECTION(sd) ((sd)->base.text_section)
 190 #define STATE_TEXT_START(sd) ((sd)->base.text_start)
 191 #define STATE_TEXT_END(sd) ((sd)->base.text_end)
 192
 193   /* Start address, set when the program is loaded from the bfd.  */
 194   bfd_vma start_addr;
 195 #define STATE_START_ADDR(sd) ((sd)->base.start_addr)
 196
 197   /* Size of the simulator's cache, if any.
 198      This is not the target's cache.  It is the cache the simulator uses
 199      to process instructions.  */
 200   unsigned int scache_size;
 201 #define STATE_SCACHE_SIZE(sd) ((sd)->base.scache_size)
 202
 203   /* core memory bus */
 204 #define STATE_CORE(sd) (&(sd)->base.core)
 205   sim_core core;
 206
 207   /* Record of memory sections added via the memory-options interface.  */
 208 #define STATE_MEMOPT(sd) ((sd)->base.memopt)
 209   sim_memopt *memopt;
 210
 211   /* event handler */
 212 #define STATE_EVENTS(sd) (&(sd)->base.events)
 213   sim_events events;
 214
 215   /* generic halt/resume engine */
 216   sim_engine engine;
 217 #define STATE_ENGINE(sd) (&(sd)->base.engine)
 218
 219   /* generic watchpoint support */
 220   sim_watchpoints watchpoints;
 221 #define STATE_WATCHPOINTS(sd) (&(sd)->base.watchpoints)
 222
 223 #if WITH_HW
 224   struct sim_hw *hw;
 225 #define STATE_HW(sd) ((sd)->base.hw)
 226 #endif
 227
 228   /* Should image loads be performed using the LMA or VMA?  Older
 229      simulators use the VMA while newer simulators prefer the LMA. */
 230   int load_at_lma_p;
 231 #define STATE_LOAD_AT_LMA_P(SD) ((SD)->base.load_at_lma_p)
 232
 233   /* Marker for those wanting to do sanity checks.
 234      This should remain the last member of this struct to help catch
 235      miscompilation errors.  */
 236   int magic;
 237 #define SIM_MAGIC_NUMBER 0x4242
 238 #define STATE_MAGIC(sd) ((sd)->base.magic)
 239 } sim_state_base;
 240
 241 /* Functions for allocating/freeing a sim_state.  */
 242 SIM_DESC sim_state_alloc (SIM_OPEN_KIND kind, host_callback *callback);
 243 void sim_state_free (SIM_DESC);
 244
 245 #endif /* SIM_BASE_H */