sim/common/sim-base.h

   1 /* Simulator pseudo baseclass.
   2
   3    Copyright 1997-2021 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    If your sim needs to allocate sim-wide state, use STATE_ARCH_DATA.  */
  46
  47
  48 #ifndef SIM_BASE_H
  49 #define SIM_BASE_H
  50
  51 #ifdef __cplusplus
  52 extern "C" {
  53 #endif
  54
  55 /* Pre-declare certain types. */
  56
  57 /* typedef <target-dependant> sim_cia; */
  58 #ifndef NULL_CIA
  59 #define NULL_CIA ((sim_cia) 0)
  60 #endif
  61 /* Return the current instruction address as a number.
  62    Some targets treat the current instruction address as a struct
  63    (e.g. for delay slot handling).  */
  64 #ifndef CIA_ADDR
  65 #define CIA_ADDR(cia) (cia)
  66 typedef address_word sim_cia;
  67 #endif
  68 #ifndef INVALID_INSTRUCTION_ADDRESS
  69 #define INVALID_INSTRUCTION_ADDRESS ((address_word)0 - 1)
  70 #endif
  71
  72 /* TODO: Probably should just delete SIM_CPU.  */
  73 typedef struct _sim_cpu SIM_CPU;
  74 typedef struct _sim_cpu sim_cpu;
  75
  76 #include "sim-module.h"
  77
  78 #include "sim-arange.h"
  79 #include "sim-trace.h"
  80 #include "sim-core.h"
  81 #include "sim-events.h"
  82 #include "sim-profile.h"
  83 #include "sim-model.h"
  84 #include "sim-io.h"
  85 #include "sim-engine.h"
  86 #include "sim-watch.h"
  87 #include "sim-memopt.h"
  88 #include "sim-cpu.h"
  89 #include "sim-assert.h"
  90
  91 struct sim_state {
  92   /* All the cpus for this instance.  */
  93   sim_cpu *cpu[MAX_NR_PROCESSORS];
  94 #if (WITH_SMP)
  95 # define STATE_CPU(sd, n) ((sd)->cpu[n])
  96 #else
  97 # define STATE_CPU(sd, n) ((sd)->cpu[0])
  98 #endif
  99
 100   /* Simulator's argv[0].  */
 101   const char *my_name;
 102 #define STATE_MY_NAME(sd) ((sd)->my_name)
 103
 104   /* Who opened the simulator.  */
 105   SIM_OPEN_KIND open_kind;
 106 #define STATE_OPEN_KIND(sd) ((sd)->open_kind)
 107
 108   /* The host callbacks.  */
 109   struct host_callback_struct *callback;
 110 #define STATE_CALLBACK(sd) ((sd)->callback)
 111
 112   /* The type of simulation environment (user/operating).  */
 113   enum sim_environment environment;
 114 #define STATE_ENVIRONMENT(sd) ((sd)->environment)
 115
 116 #if 0 /* FIXME: Not ready yet.  */
 117   /* Stuff defined in sim-config.h.  */
 118   struct sim_config config;
 119 #define STATE_CONFIG(sd) ((sd)->config)
 120 #endif
 121
 122   /* List of installed module `init' handlers.  */
 123   struct module_list *modules;
 124 #define STATE_MODULES(sd) ((sd)->modules)
 125
 126   /* Supported options.  */
 127   struct option_list *options;
 128 #define STATE_OPTIONS(sd) ((sd)->options)
 129
 130   /* Non-zero if -v specified.  */
 131   int verbose_p;
 132 #define STATE_VERBOSE_P(sd) ((sd)->verbose_p)
 133
 134   /* Non cpu-specific trace data.  See sim-trace.h.  */
 135   TRACE_DATA trace_data;
 136 #define STATE_TRACE_DATA(sd) (& (sd)->trace_data)
 137
 138   /* If non NULL, the BFD architecture specified on the command line */
 139   const struct bfd_arch_info *architecture;
 140 #define STATE_ARCHITECTURE(sd) ((sd)->architecture)
 141
 142   /* If non NULL, the bfd target specified on the command line */
 143   const char *target;
 144 #define STATE_TARGET(sd) ((sd)->target)
 145
 146   /* List of machs available.  */
 147   const SIM_MACH * const *machs;
 148 #define STATE_MACHS(sd) ((sd)->machs)
 149
 150   /* In standalone simulator, this is the program's arguments passed
 151      on the command line.  */
 152   char **prog_argv;
 153 #define STATE_PROG_ARGV(sd) ((sd)->prog_argv)
 154
 155   /* The program's bfd.  */
 156   struct bfd *prog_bfd;
 157 #define STATE_PROG_BFD(sd) ((sd)->prog_bfd)
 158
 159   /* Symbol table for prog_bfd */
 160   struct bfd_symbol **prog_syms;
 161 #define STATE_PROG_SYMS(sd) ((sd)->prog_syms)
 162
 163   /* Number of prog_syms symbols.  */
 164   long prog_syms_count;
 165 #define STATE_PROG_SYMS_COUNT(sd) ((sd)->prog_syms_count)
 166
 167   /* The program's text section.  */
 168   struct bfd_section *text_section;
 169   /* Starting and ending text section addresses from the bfd.  */
 170   bfd_vma text_start, text_end;
 171 #define STATE_TEXT_SECTION(sd) ((sd)->text_section)
 172 #define STATE_TEXT_START(sd) ((sd)->text_start)
 173 #define STATE_TEXT_END(sd) ((sd)->text_end)
 174
 175   /* Start address, set when the program is loaded from the bfd.  */
 176   bfd_vma start_addr;
 177 #define STATE_START_ADDR(sd) ((sd)->start_addr)
 178
 179   /* Size of the simulator's cache, if any.
 180      This is not the target's cache.  It is the cache the simulator uses
 181      to process instructions.  */
 182   unsigned int scache_size;
 183 #define STATE_SCACHE_SIZE(sd) ((sd)->scache_size)
 184
 185   /* core memory bus */
 186 #define STATE_CORE(sd) (&(sd)->core)
 187   sim_core core;
 188
 189   /* Record of memory sections added via the memory-options interface.  */
 190 #define STATE_MEMOPT(sd) ((sd)->memopt)
 191   sim_memopt *memopt;
 192
 193   /* event handler */
 194 #define STATE_EVENTS(sd) (&(sd)->events)
 195   sim_events events;
 196
 197   /* generic halt/resume engine */
 198   sim_engine engine;
 199 #define STATE_ENGINE(sd) (&(sd)->engine)
 200
 201   /* generic watchpoint support */
 202   sim_watchpoints watchpoints;
 203 #define STATE_WATCHPOINTS(sd) (&(sd)->watchpoints)
 204
 205 #if WITH_HW
 206   struct sim_hw *hw;
 207 #define STATE_HW(sd) ((sd)->hw)
 208 #endif
 209
 210   /* Should image loads be performed using the LMA or VMA?  Older
 211      simulators use the VMA while newer simulators prefer the LMA. */
 212   int load_at_lma_p;
 213 #define STATE_LOAD_AT_LMA_P(SD) ((SD)->load_at_lma_p)
 214
 215   /* Pointer for sim target to store arbitrary state data.  Normally the
 216      target should define a struct and use it here.  */
 217   void *arch_data;
 218 #define STATE_ARCH_DATA(sd) ((sd)->arch_data)
 219
 220   /* Marker for those wanting to do sanity checks.
 221      This should remain the last member of this struct to help catch
 222      miscompilation errors.  */
 223   int magic;
 224 #define SIM_MAGIC_NUMBER 0x4242
 225 #define STATE_MAGIC(sd) ((sd)->magic)
 226 };
 227
 228 /* Functions for allocating/freeing a sim_state.  */
 229 SIM_DESC sim_state_alloc_extra (SIM_OPEN_KIND kind, host_callback *callback,
 230                                 size_t extra_bytes);
 231 #define sim_state_alloc(kind, callback) sim_state_alloc_extra(kind, callback, 0)
 232
 233 void sim_state_free (SIM_DESC);
 234
 235 #ifdef __cplusplus
 236 }
 237 #endif
 238
 239 #endif /* SIM_BASE_H */