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 "basics.h"
  27 #include "function_unit.h"
  28 #include "psim.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               function_unit_model(p+1);
  97             else {
  98               argp += 1;
  99               if (argv[argp] == NULL)
 100                 error("Missing <trace> option for -t\n");
 101               else
 102                 function_unit_model(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   /* do something */
 120   TRACE(trace_tbd, ("sim_open() - TBD - should parse the arguments\n"));
 121   TRACE(trace_tbd, ("sim_open() - TBD - can not create simulator here as do not have description of it\n"));
 122 }
 123
 124
 125 void
 126 sim_close (int quitting)
 127 {
 128   TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
 129   if (print_info)
 130     psim_print_info (simulator, print_info);
 131
 132   /* nothing to do */
 133 }
 134
 135
 136 int
 137 sim_load (char *prog, int from_tty)
 138 {
 139   char **argv;
 140   TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
 141                     prog, from_tty));
 142   ASSERT(prog != NULL);
 143
 144   /* parse the arguments, assume that the file is argument 0 */
 145   argv = buildargv(prog);
 146   ASSERT(argv != NULL && argv[0] != NULL);
 147
 148   /* create the simulator */
 149   TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
 150   simulator = psim_create(argv[0]);
 151
 152   /* bring in all the data section */
 153   psim_init(simulator);
 154
 155   /* release the arguments */
 156   freeargv(argv);
 157
 158   /* `I did it my way' */
 159   return 0;
 160 }
 161
 162
 163 void
 164 sim_kill (void)
 165 {
 166   TRACE(trace_gdb, ("sim_kill(void) called\n"));
 167   /* do nothing, nothing to do */
 168 }
 169
 170
 171 int
 172 sim_read (SIM_ADDR mem, unsigned char *buf, int length)
 173 {
 174   int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
 175                                 buf, mem, length);
 176   TRACE(trace_gdb, ("sim_read(mem=0x%x, buf=0x%x, length=%d) = %d\n",
 177                     mem, buf, length, result));
 178   return result;
 179 }
 180
 181
 182 int
 183 sim_write (SIM_ADDR mem, unsigned char *buf, int length)
 184 {
 185   int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
 186                                  buf, mem, length,
 187                                  1/*violate_ro*/);
 188   TRACE(trace_gdb, ("sim_write(mem=0x%x, buf=0x%x, length=%d) = %d\n",
 189                     mem, buf, length, result));
 190   return result;
 191 }
 192
 193
 194 void
 195 sim_fetch_register (int regno, unsigned char *buf)
 196 {
 197   if (simulator == NULL) {
 198     return;
 199   }
 200   TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%x)\n",
 201                     regno, register_names[regno], buf));
 202   psim_read_register(simulator, MAX_NR_PROCESSORS,
 203                      buf, register_names[regno],
 204                      raw_transfer);
 205 }
 206
 207
 208 void
 209 sim_store_register (int regno, unsigned char *buf)
 210 {
 211   if (simulator == NULL)
 212     return;
 213   TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%x)\n",
 214                     regno, register_names[regno], buf));
 215   psim_write_register(simulator, MAX_NR_PROCESSORS,
 216                       buf, register_names[regno],
 217                       raw_transfer);
 218 }
 219
 220
 221 void
 222 sim_info (int verbose)
 223 {
 224   TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
 225   psim_print_info (simulator, verbose);
 226 }
 227
 228
 229 void
 230 sim_create_inferior (SIM_ADDR start_address, char **argv, char **envp)
 231 {
 232   unsigned_word entry_point = start_address;
 233
 234   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 235                     start_address));
 236
 237   psim_init(simulator);
 238   psim_stack(simulator, argv, envp);
 239
 240   psim_write_register(simulator, -1 /* all start at same PC */,
 241                       &entry_point, "pc", cooked_transfer);
 242 }
 243
 244
 245 static volatile int sim_should_run;
 246
 247 void
 248 sim_stop_reason (enum sim_stop *reason, int *sigrc)
 249 {
 250   psim_status status = psim_get_status(simulator);
 251
 252   switch (CURRENT_ENVIRONMENT) {
 253
 254   case USER_ENVIRONMENT:
 255   case VIRTUAL_ENVIRONMENT:
 256     switch (status.reason) {
 257     case was_continuing:
 258       *reason = sim_stopped;
 259       *sigrc = SIGTRAP;
 260       if (sim_should_run) {
 261         error("sim_stop_reason() unknown reason for halt\n");
 262       }
 263       break;
 264     case was_trap:
 265       *reason = sim_stopped;
 266       *sigrc = SIGTRAP;
 267       break;
 268     case was_exited:
 269       *reason = sim_exited;
 270       *sigrc = 0;
 271       break;
 272     case was_signalled:
 273       *reason = sim_signalled;
 274       *sigrc = status.signal;
 275       break;
 276     }
 277     break;
 278
 279   case OPERATING_ENVIRONMENT:
 280     *reason = sim_stopped;
 281     *sigrc = SIGTRAP;
 282     break;
 283
 284   default:
 285     error("sim_stop_reason() - unknown environment\n");
 286
 287   }
 288
 289   TRACE(trace_gdb, ("sim_stop_reason(reason=0x%x(%d), sigrc=0x%x(%d))\n",
 290                     reason, *reason, sigrc, *sigrc));
 291 }
 292
 293
 294
 295 /* Run (or resume) the program.  */
 296 static void
 297 sim_ctrl_c()
 298 {
 299   sim_should_run = 0;
 300 }
 301
 302 void
 303 sim_resume (int step, int siggnal)
 304 {
 305   void (*prev) ();
 306
 307   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 308                     step, siggnal));
 309
 310   prev = signal(SIGINT, sim_ctrl_c);
 311   sim_should_run = 1;
 312
 313   if (step)
 314     psim_step(simulator);
 315   else
 316     psim_run_until_stop(simulator, &sim_should_run);
 317
 318   signal(SIGINT, prev);
 319 }
 320
 321 void
 322 sim_do_command(char *cmd)
 323 {
 324   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n", cmd));
 325 }
 326
 327 void
 328 sim_set_callbacks (host_callback *callback)
 329 {
 330   TRACE(trace_gdb, ("sim_set_callbacks called\n"));
 331 }
 332
 333 /****/
 334
 335 void *
 336 zalloc(long size)
 337 {
 338   void *memory = (void*)xmalloc(size);
 339   if (memory == NULL)
 340     error("xmalloc failed\n");
 341   bzero(memory, size);
 342   return memory;
 343 }
 344
 345 void zfree(void *data)
 346 {
 347   mfree(NULL, data);
 348 }