sim/ppc/sim_calls.c

   1 /*  This file is part of the program psim.
   2
   3     Copyright (C) 1994-1995, 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 "cpu.h"
  27 #include "psim.h"
  28 #include "options.h"
  29
  30 #ifdef HAVE_STDLIB_H
  31 #include <stdlib.h>
  32 #endif
  33
  34 #ifdef HAVE_STRING_H
  35 #include <string.h>
  36 #else
  37 #ifdef HAVE_STRINGS_H
  38 #include <strings.h>
  39 #endif
  40 #endif
  41
  42 #include "../../gdb/defs.h"
  43
  44 #include "devices.h"
  45
  46 #include "../../gdb/remote-sim.h"
  47 #include "../../gdb/callback.h"
  48
  49
  50 /* Structures used by the simulator, for gdb just have static structures */
  51
  52 static psim *simulator;
  53 static char *register_names[] = REGISTER_NAMES;
  54 static int print_info = 0;
  55
  56 void
  57 sim_open (char *args)
  58 {
  59   /* trace the call */
  60   TRACE(trace_gdb, ("sim_open(args=%s) called\n", args ? args : "(null)"));
  61
  62   if (args) {
  63     char **argv = buildargv(args);
  64     int argp = 0;
  65     int argc;
  66     for (argc = 0; argv[argc]; argc++);
  67
  68     while (argp < argc) {
  69       if (*argv[argp] != '-')
  70         error ("Argument is not an option '%s'", argv[argp]);
  71
  72       else {
  73         /* check arguments -- note, main.c also contains argument processing
  74            code for the standalone emulator.  */
  75         char *p = argv[argp] + 1;
  76         while (*p != '\0') {
  77           switch (*p) {
  78           default:
  79             printf_filtered("Usage:\n\ttarget sim [ -t <trace-option> ] [-m model] [-i] [-I]\n");
  80             trace_usage();
  81             error ("");
  82             break;
  83           case 't':
  84             if (p[1])
  85               trace_option(p+1);
  86             else {
  87               argp += 1;
  88               if (argv[argp] == NULL)
  89                 error("Missing <trace> option for -t\n");
  90               else
  91                 trace_option(argv[argp]);
  92             }
  93             break;
  94           case 'm':
  95             if (p[1])
  96               model_set(p+1);
  97             else {
  98               argp += 1;
  99               if (argv[argp] == NULL)
 100                 error("Missing <trace> option for -t\n");
 101               else
 102                 model_set(argv[argp]);
 103             }
 104             break;
 105           case 'i':
 106             print_info = 1;
 107             break;
 108           case 'I':
 109             print_info = 2;
 110             break;
 111           }
 112           p += 1;
 113         }
 114       }
 115       argp += 1;
 116     }
 117   }
 118
 119   if (ppc_trace[trace_opts])
 120     print_options ();
 121
 122   /* do something */
 123   TRACE(trace_tbd, ("sim_open() - TBD - should parse the arguments\n"));
 124   TRACE(trace_tbd, ("sim_open() - TBD - can not create simulator here as do not have description of it\n"));
 125 }
 126
 127
 128 void
 129 sim_close (int quitting)
 130 {
 131   TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
 132   if (print_info)
 133     psim_print_info (simulator, print_info);
 134
 135   /* nothing to do */
 136 }
 137
 138
 139 int
 140 sim_load (char *prog, int from_tty)
 141 {
 142   char **argv;
 143   TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
 144                     prog, from_tty));
 145   ASSERT(prog != NULL);
 146
 147   /* parse the arguments, assume that the file is argument 0 */
 148   argv = buildargv(prog);
 149   ASSERT(argv != NULL && argv[0] != NULL);
 150
 151   /* create the simulator */
 152   TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
 153   simulator = psim_create(argv[0]);
 154
 155   /* bring in all the data section */
 156   psim_init(simulator);
 157
 158   /* release the arguments */
 159   freeargv(argv);
 160
 161   /* `I did it my way' */
 162   return 0;
 163 }
 164
 165
 166 void
 167 sim_kill (void)
 168 {
 169   TRACE(trace_gdb, ("sim_kill(void) called\n"));
 170   /* do nothing, nothing to do */
 171 }
 172
 173
 174 int
 175 sim_read (SIM_ADDR mem, unsigned char *buf, int length)
 176 {
 177   int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
 178                                 buf, mem, length);
 179   TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 180                     (long)mem, (long)buf, length, result));
 181   return result;
 182 }
 183
 184
 185 int
 186 sim_write (SIM_ADDR mem, unsigned char *buf, int length)
 187 {
 188   int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
 189                                  buf, mem, length,
 190                                  1/*violate_ro*/);
 191   TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 192                     (long)mem, (long)buf, length, result));
 193   return result;
 194 }
 195
 196
 197 void
 198 sim_fetch_register (int regno, unsigned char *buf)
 199 {
 200   if (simulator == NULL) {
 201     return;
 202   }
 203   TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%lx)\n",
 204                     regno, register_names[regno], (long)buf));
 205   psim_read_register(simulator, MAX_NR_PROCESSORS,
 206                      buf, register_names[regno],
 207                      raw_transfer);
 208 }
 209
 210
 211 void
 212 sim_store_register (int regno, unsigned char *buf)
 213 {
 214   if (simulator == NULL)
 215     return;
 216   TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%lx)\n",
 217                     regno, register_names[regno], (long)buf));
 218   psim_write_register(simulator, MAX_NR_PROCESSORS,
 219                       buf, register_names[regno],
 220                       raw_transfer);
 221 }
 222
 223
 224 void
 225 sim_info (int verbose)
 226 {
 227   TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
 228   psim_print_info (simulator, verbose);
 229 }
 230
 231
 232 void
 233 sim_create_inferior (SIM_ADDR start_address, char **argv, char **envp)
 234 {
 235   unsigned_word entry_point = start_address;
 236
 237   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 238                     start_address));
 239
 240   psim_init(simulator);
 241   psim_stack(simulator, argv, envp);
 242
 243   psim_write_register(simulator, -1 /* all start at same PC */,
 244                       &entry_point, "pc", cooked_transfer);
 245 }
 246
 247
 248 static volatile int sim_should_run;
 249
 250 void
 251 sim_stop_reason (enum sim_stop *reason, int *sigrc)
 252 {
 253   psim_status status = psim_get_status(simulator);
 254
 255   switch (CURRENT_ENVIRONMENT) {
 256
 257   case USER_ENVIRONMENT:
 258   case VIRTUAL_ENVIRONMENT:
 259     switch (status.reason) {
 260     case was_continuing:
 261       *reason = sim_stopped;
 262       *sigrc = SIGTRAP;
 263       if (sim_should_run) {
 264         error("sim_stop_reason() unknown reason for halt\n");
 265       }
 266       break;
 267     case was_trap:
 268       *reason = sim_stopped;
 269       *sigrc = SIGTRAP;
 270       break;
 271     case was_exited:
 272       *reason = sim_exited;
 273       *sigrc = 0;
 274       break;
 275     case was_signalled:
 276       *reason = sim_signalled;
 277       *sigrc = status.signal;
 278       break;
 279     }
 280     break;
 281
 282   case OPERATING_ENVIRONMENT:
 283     *reason = sim_stopped;
 284     *sigrc = SIGTRAP;
 285     break;
 286
 287   default:
 288     error("sim_stop_reason() - unknown environment\n");
 289
 290   }
 291
 292   TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
 293                     (long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
 294 }
 295
 296
 297
 298 /* Run (or resume) the program.  */
 299 static void
 300 sim_ctrl_c()
 301 {
 302   sim_should_run = 0;
 303 }
 304
 305 void
 306 sim_resume (int step, int siggnal)
 307 {
 308   void (*prev) ();
 309
 310   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 311                     step, siggnal));
 312
 313   prev = signal(SIGINT, sim_ctrl_c);
 314   sim_should_run = 1;
 315
 316   if (step)
 317     psim_step(simulator);
 318   else
 319     psim_run_until_stop(simulator, &sim_should_run);
 320
 321   signal(SIGINT, prev);
 322 }
 323
 324 void
 325 sim_do_command(char *cmd)
 326 {
 327   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n", cmd));
 328 }
 329
 330 void
 331 sim_set_callbacks (host_callback *callback)
 332 {
 333   TRACE(trace_gdb, ("sim_set_callbacks called\n"));
 334 }
 335
 336 /****/
 337
 338 void *
 339 zalloc(long size)
 340 {
 341   void *memory = (void*)xmalloc(size);
 342   if (memory == NULL)
 343     error("xmalloc failed\n");
 344   bzero(memory, size);
 345   return memory;
 346 }
 347
 348 void zfree(void *data)
 349 {
 350   mfree(NULL, data);
 351 }