1 /* Simulator pseudo baseclass. 2 3 Copyright 1997-2014 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 typedef address_word sim_cia; 32 /-* If `sim_cia' is not an integral value (e.g. a struct), define 33 CIA_ADDR to return the integral value. *-/ 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 #if (WITH_SMP) 48 #define STATE_CPU(sd,n) ((sd)->cpu[n]) 49 #else 50 #define STATE_CPU(sd,n) ((sd)->cpu[0]) 51 #endif 52 ... simulator specific members ... 53 sim_state_base base; 54 }; 55 56 Note that `base' appears last. This makes `base.magic' appear last 57 in the entire struct and helps catch miscompilation errors. */ 58 59 60 #ifndef SIM_BASE_H 61 #define SIM_BASE_H 62 63 /* Pre-declare certain types. */ 64 65 /* typedef <target-dependant> sim_cia; */ 66 #ifndef NULL_CIA 67 #define NULL_CIA ((sim_cia) 0) 68 #endif 69 /* Return the current instruction address as a number. 70 Some targets treat the current instruction address as a struct 71 (e.g. for delay slot handling). */ 72 #ifndef CIA_ADDR 73 #define CIA_ADDR(cia) (cia) 74 #endif 75 #ifndef INVALID_INSTRUCTION_ADDRESS 76 #define INVALID_INSTRUCTION_ADDRESS ((address_word)0 - 1) 77 #endif 78 79 typedef struct _sim_cpu sim_cpu; 80 81 #include "sim-module.h" 82 83 #include "sim-trace.h" 84 #include "sim-core.h" 85 #include "sim-events.h" 86 #include "sim-profile.h" 87 #ifdef SIM_HAVE_MODEL 88 #include "sim-model.h" 89 #endif 90 #include "sim-io.h" 91 #include "sim-engine.h" 92 #include "sim-watch.h" 93 #include "sim-memopt.h" 94 #include "sim-cpu.h" 95 96 /* Global pointer to current state while sim_resume is running. 97 On a machine with lots of registers, it might be possible to reserve 98 one of them for current_state. However on a machine with few registers 99 current_state can't permanently live in one and indirecting through it 100 will be slower [in which case one can have sim_resume set globals from 101 current_state for faster access]. 102 If CURRENT_STATE_REG is defined, it means current_state is living in 103 a global register. */ 104 105 106 #ifdef CURRENT_STATE_REG 107 /* FIXME: wip */ 108 #else 109 extern struct sim_state *current_state; 110 #endif 111 112 113 /* The simulator may provide different (and faster) definition. */ 114 #ifndef CURRENT_STATE 115 #define CURRENT_STATE current_state 116 #endif 117 118 119 typedef struct { 120 121 /* Simulator's argv[0]. */ 122 const char *my_name; 123 #define STATE_MY_NAME(sd) ((sd)->base.my_name) 124 125 /* Who opened the simulator. */ 126 SIM_OPEN_KIND open_kind; 127 #define STATE_OPEN_KIND(sd) ((sd)->base.open_kind) 128 129 /* The host callbacks. */ 130 struct host_callback_struct *callback; 131 #define STATE_CALLBACK(sd) ((sd)->base.callback) 132 133 /* The type of simulation environment (user/operating). */ 134 enum sim_environment environment; 135 #define STATE_ENVIRONMENT(sd) ((sd)->base.environment) 136 137 #if 0 /* FIXME: Not ready yet. */ 138 /* Stuff defined in sim-config.h. */ 139 struct sim_config config; 140 #define STATE_CONFIG(sd) ((sd)->base.config) 141 #endif 142 143 /* List of installed module `init' handlers. */ 144 struct module_list *modules; 145 #define STATE_MODULES(sd) ((sd)->base.modules) 146 147 /* Supported options. */ 148 struct option_list *options; 149 #define STATE_OPTIONS(sd) ((sd)->base.options) 150 151 /* Non-zero if -v specified. */ 152 int verbose_p; 153 #define STATE_VERBOSE_P(sd) ((sd)->base.verbose_p) 154 155 /* Non cpu-specific trace data. See sim-trace.h. */ 156 TRACE_DATA trace_data; 157 #define STATE_TRACE_DATA(sd) (& (sd)->base.trace_data) 158 159 /* If non NULL, the BFD architecture specified on the command line */ 160 const struct bfd_arch_info *architecture; 161 #define STATE_ARCHITECTURE(sd) ((sd)->base.architecture) 162 163 /* If non NULL, the bfd target specified on the command line */ 164 const char *target; 165 #define STATE_TARGET(sd) ((sd)->base.target) 166 167 /* In standalone simulator, this is the program's arguments passed 168 on the command line. */ 169 char **prog_argv; 170 #define STATE_PROG_ARGV(sd) ((sd)->base.prog_argv) 171 172 /* The program's bfd. */ 173 struct bfd *prog_bfd; 174 #define STATE_PROG_BFD(sd) ((sd)->base.prog_bfd) 175 176 /* Symbol table for prog_bfd */ 177 struct bfd_symbol **prog_syms; 178 #define STATE_PROG_SYMS(sd) ((sd)->base.prog_syms) 179 180 /* The program's text section. */ 181 struct bfd_section *text_section; 182 /* Starting and ending text section addresses from the bfd. */ 183 bfd_vma text_start, text_end; 184 #define STATE_TEXT_SECTION(sd) ((sd)->base.text_section) 185 #define STATE_TEXT_START(sd) ((sd)->base.text_start) 186 #define STATE_TEXT_END(sd) ((sd)->base.text_end) 187 188 /* Start address, set when the program is loaded from the bfd. */ 189 bfd_vma start_addr; 190 #define STATE_START_ADDR(sd) ((sd)->base.start_addr) 191 192 /* Size of the simulator's cache, if any. 193 This is not the target's cache. It is the cache the simulator uses 194 to process instructions. */ 195 unsigned int scache_size; 196 #define STATE_SCACHE_SIZE(sd) ((sd)->base.scache_size) 197 198 /* FIXME: Move to top level sim_state struct (as some struct)? */ 199 #ifdef SIM_HAVE_FLATMEM 200 unsigned int mem_size; 201 #define STATE_MEM_SIZE(sd) ((sd)->base.mem_size) 202 unsigned int mem_base; 203 #define STATE_MEM_BASE(sd) ((sd)->base.mem_base) 204 unsigned char *memory; 205 #define STATE_MEMORY(sd) ((sd)->base.memory) 206 #endif 207 208 /* core memory bus */ 209 #define STATE_CORE(sd) (&(sd)->base.core) 210 sim_core core; 211 212 /* Record of memory sections added via the memory-options interface. */ 213 #define STATE_MEMOPT(sd) ((sd)->base.memopt) 214 sim_memopt *memopt; 215 216 /* event handler */ 217 #define STATE_EVENTS(sd) (&(sd)->base.events) 218 sim_events events; 219 220 /* generic halt/resume engine */ 221 sim_engine engine; 222 #define STATE_ENGINE(sd) (&(sd)->base.engine) 223 224 /* generic watchpoint support */ 225 sim_watchpoints watchpoints; 226 #define STATE_WATCHPOINTS(sd) (&(sd)->base.watchpoints) 227 228 #if WITH_HW 229 struct sim_hw *hw; 230 #define STATE_HW(sd) ((sd)->base.hw) 231 #endif 232 233 /* Should image loads be performed using the LMA or VMA? Older 234 simulators use the VMA while newer simulators prefer the LMA. */ 235 int load_at_lma_p; 236 #define STATE_LOAD_AT_LMA_P(SD) ((SD)->base.load_at_lma_p) 237 238 /* Marker for those wanting to do sanity checks. 239 This should remain the last member of this struct to help catch 240 miscompilation errors. */ 241 int magic; 242 #define SIM_MAGIC_NUMBER 0x4242 243 #define STATE_MAGIC(sd) ((sd)->base.magic) 244 } sim_state_base; 245 246 /* Functions for allocating/freeing a sim_state. */ 247 SIM_DESC sim_state_alloc (SIM_OPEN_KIND kind, host_callback *callback); 248 void sim_state_free (SIM_DESC); 249 250 #endif /* SIM_BASE_H */ 251