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