sim/ppc/sim_calls.c

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1996, Andrew Cagney <cagney@highland.com.au>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License
  16     along with this program; if not, write to the Free Software
  17     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  18
  19     */
  20
  21
  22 #include <signal.h> /* FIXME - should be machine dependant version */
  23 #include <stdarg.h>
  24 #include <ctype.h>
  25
  26 #include "psim.h"
  27 #include "options.h"
  28
  29 #undef printf_filtered /* blow away the mapping */
  30
  31 #ifdef HAVE_STDLIB_H
  32 #include <stdlib.h>
  33 #endif
  34
  35 #ifdef HAVE_STRING_H
  36 #include <string.h>
  37 #else
  38 #ifdef HAVE_STRINGS_H
  39 #include <strings.h>
  40 #endif
  41 #endif
  42
  43 #include "../../gdb/defs.h"
  44
  45 #include "../../gdb/remote-sim.h"
  46 #include "../../gdb/callback.h"
  47
  48
  49 /* Structures used by the simulator, for gdb just have static structures */
  50
  51 static psim *simulator;
  52 static device *root_device;
  53 static const char *register_names[] = REGISTER_NAMES;
  54
  55 void
  56 sim_open (char *args)
  57 {
  58   /* Note: The simulation is not created by sim_open() because
  59      complete information is not yet available */
  60   /* trace the call */
  61   TRACE(trace_gdb, ("sim_open(args=%s) called\n", args ? args : "(null)"));
  62
  63   if (root_device != NULL)
  64     sim_io_printf_filtered("Warning - re-open of simulator leaks memory\n");
  65   root_device = psim_tree();
  66   simulator = NULL;
  67
  68   if (args) {
  69     char **argv = buildargv(args);
  70     psim_options(root_device, argv);
  71     freeargv(argv);
  72   }
  73
  74   if (ppc_trace[trace_opts])
  75     print_options ();
  76 }
  77
  78
  79 void
  80 sim_close (int quitting)
  81 {
  82   TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
  83   if (ppc_trace[trace_print_info] && simulator != NULL)
  84     psim_print_info (simulator, ppc_trace[trace_print_info]);
  85 }
  86
  87
  88 int
  89 sim_load (char *prog, int from_tty)
  90 {
  91   char **argv;
  92   TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
  93                     prog, from_tty));
  94   ASSERT(prog != NULL);
  95
  96   /* parse the arguments, assume that the file is argument 0 */
  97   argv = buildargv(prog);
  98   ASSERT(argv != NULL && argv[0] != NULL);
  99
 100   /* create the simulator */
 101   TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
 102   simulator = psim_create(argv[0], root_device);
 103
 104   /* bring in all the data section */
 105   psim_init(simulator);
 106
 107   /* release the arguments */
 108   freeargv(argv);
 109
 110   /* `I did it my way' */
 111   return 0;
 112 }
 113
 114
 115 void
 116 sim_kill (void)
 117 {
 118   TRACE(trace_gdb, ("sim_kill(void) called\n"));
 119   /* do nothing, nothing to do */
 120 }
 121
 122
 123 int
 124 sim_read (SIM_ADDR mem, unsigned char *buf, int length)
 125 {
 126   int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
 127                                 buf, mem, length);
 128   TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 129                     (long)mem, (long)buf, length, result));
 130   return result;
 131 }
 132
 133
 134 int
 135 sim_write (SIM_ADDR mem, unsigned char *buf, int length)
 136 {
 137   int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
 138                                  buf, mem, length,
 139                                  1/*violate_ro*/);
 140   TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 141                     (long)mem, (long)buf, length, result));
 142   return result;
 143 }
 144
 145
 146 void
 147 sim_fetch_register (int regno, unsigned char *buf)
 148 {
 149   if (simulator == NULL) {
 150     return;
 151   }
 152   TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%lx)\n",
 153                     regno, register_names[regno], (long)buf));
 154   psim_read_register(simulator, MAX_NR_PROCESSORS,
 155                      buf, register_names[regno],
 156                      raw_transfer);
 157 }
 158
 159
 160 void
 161 sim_store_register (int regno, unsigned char *buf)
 162 {
 163   if (simulator == NULL)
 164     return;
 165   TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%lx)\n",
 166                     regno, register_names[regno], (long)buf));
 167   psim_write_register(simulator, MAX_NR_PROCESSORS,
 168                       buf, register_names[regno],
 169                       raw_transfer);
 170 }
 171
 172
 173 void
 174 sim_info (int verbose)
 175 {
 176   TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
 177   psim_print_info (simulator, verbose);
 178 }
 179
 180
 181 void
 182 sim_create_inferior (SIM_ADDR start_address, char **argv, char **envp)
 183 {
 184   unsigned_word entry_point = start_address;
 185
 186   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 187                     start_address));
 188
 189   psim_init(simulator);
 190   psim_stack(simulator, argv, envp);
 191
 192   psim_write_register(simulator, -1 /* all start at same PC */,
 193                       &entry_point, "pc", cooked_transfer);
 194 }
 195
 196
 197 static volatile int sim_should_run;
 198
 199 void
 200 sim_stop_reason (enum sim_stop *reason, int *sigrc)
 201 {
 202   psim_status status = psim_get_status(simulator);
 203
 204   switch (CURRENT_ENVIRONMENT) {
 205
 206   case USER_ENVIRONMENT:
 207   case VIRTUAL_ENVIRONMENT:
 208     switch (status.reason) {
 209     case was_continuing:
 210       *reason = sim_stopped;
 211       *sigrc = SIGTRAP;
 212       if (sim_should_run) {
 213         error("sim_stop_reason() unknown reason for halt\n");
 214       }
 215       break;
 216     case was_trap:
 217       *reason = sim_stopped;
 218       *sigrc = SIGTRAP;
 219       break;
 220     case was_exited:
 221       *reason = sim_exited;
 222       *sigrc = 0;
 223       break;
 224     case was_signalled:
 225       *reason = sim_signalled;
 226       *sigrc = status.signal;
 227       break;
 228     }
 229     break;
 230
 231   case OPERATING_ENVIRONMENT:
 232     *reason = sim_stopped;
 233     *sigrc = SIGTRAP;
 234     break;
 235
 236   default:
 237     error("sim_stop_reason() - unknown environment\n");
 238
 239   }
 240
 241   TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
 242                     (long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
 243 }
 244
 245
 246
 247 /* Run (or resume) the program.  */
 248 static void
 249 sim_ctrl_c()
 250 {
 251   sim_should_run = 0;
 252 }
 253
 254 void
 255 sim_resume (int step, int siggnal)
 256 {
 257   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 258                     step, siggnal));
 259
 260   if (step)
 261     {
 262       psim_step(simulator);
 263       /* sim_stop_reason has a sanity check for stopping while
 264          was_continuing.  We don't want that here so reset sim_should_run.  */
 265       sim_should_run = 0;
 266     }
 267   else
 268     {
 269       void (*prev) ();
 270
 271       prev = signal(SIGINT, sim_ctrl_c);
 272       sim_should_run = 1;
 273       psim_run_until_stop(simulator, &sim_should_run);
 274       signal(SIGINT, prev);
 275     }
 276 }
 277
 278 void
 279 sim_do_command (char *cmd)
 280 {
 281   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
 282                     cmd ? cmd : "(null)"));
 283   if (cmd) {
 284     char **argv = buildargv(cmd);
 285     psim_options(root_device, argv);
 286     freeargv(argv);
 287   }
 288 }
 289
 290
 291 /* Map simulator IO operations onto the corresponding GDB I/O
 292    functions.
 293
 294    NB: Only a limited subset of operations are mapped across.  More
 295    advanced operations (such as dup or write) must either be mapped to
 296    one of the below calls or handled internally */
 297
 298 static host_callback *callbacks;
 299
 300 int
 301 sim_io_read_stdin(char *buf,
 302                   int sizeof_buf)
 303 {
 304   switch (CURRENT_STDIO) {
 305   case DO_USE_STDIO:
 306     return callbacks->read_stdin(callbacks, buf, sizeof_buf);
 307     break;
 308   case DONT_USE_STDIO:
 309     return callbacks->read(callbacks, 0, buf, sizeof_buf);
 310     break;
 311   default:
 312     error("sim_io_read_stdin: unaccounted switch\n");
 313     break;
 314   }
 315 }
 316
 317 int
 318 sim_io_write_stdout(const char *buf,
 319                     int sizeof_buf)
 320 {
 321   switch (CURRENT_STDIO) {
 322   case DO_USE_STDIO:
 323     return callbacks->write_stdout(callbacks, buf, sizeof_buf);
 324     break;
 325   case DONT_USE_STDIO:
 326     return callbacks->write(callbacks, 1, buf, sizeof_buf);
 327     break;
 328   default:
 329     error("sim_io_write_stdout: unaccounted switch\n");
 330     break;
 331   }
 332 }
 333
 334 int
 335 sim_io_write_stderr(const char *buf,
 336                     int sizeof_buf)
 337 {
 338   switch (CURRENT_STDIO) {
 339   case DO_USE_STDIO:
 340     /* NB: I think there should be an explicit write_stderr callback */
 341     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 342     break;
 343   case DONT_USE_STDIO:
 344     return callbacks->write(callbacks, 3, buf, sizeof_buf);
 345     break;
 346   default:
 347     error("sim_io_write_stderr: unaccounted switch\n");
 348     break;
 349   }
 350 }
 351
 352
 353 void
 354 sim_io_printf_filtered(const char *fmt,
 355                        ...)
 356 {
 357   char message[1024];
 358   va_list ap;
 359   /* format the message */
 360   va_start(ap, fmt);
 361   vsprintf(message, fmt, ap);
 362   va_end(ap);
 363   /* sanity check */
 364   if (strlen(message) >= sizeof(message))
 365     error("sim_io_printf_filtered: buffer overflow\n");
 366   callbacks->printf_filtered(callbacks, "%s", message);
 367 }
 368
 369 void
 370 sim_io_flush_stdoutput(void)
 371 {
 372   switch (CURRENT_STDIO) {
 373   case DO_USE_STDIO:
 374     gdb_flush (gdb_stdout);
 375     break;
 376   case DONT_USE_STDIO:
 377     break;
 378   default:
 379     error("sim_io_read_stdin: unaccounted switch\n");
 380     break;
 381   }
 382 }
 383
 384 void
 385 sim_set_callbacks (host_callback *callback)
 386 {
 387   callbacks = callback;
 388   TRACE(trace_gdb, ("sim_set_callbacks called\n"));
 389 }
 390
 391 /****/
 392
 393 void *
 394 zalloc(long size)
 395 {
 396   void *memory = (void*)xmalloc(size);
 397   if (memory == NULL)
 398     error("xmalloc failed\n");
 399   memset(memory, 0, size);
 400   return memory;
 401 }
 402
 403 void zfree(void *data)
 404 {
 405   mfree(NULL, data);
 406 }