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 #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 "../../gdb/remote-sim.h"
  44 #include "../../gdb/callback.h"
  45
  46
  47 /* Structures used by the simulator, for gdb just have static structures */
  48
  49 static psim *simulator;
  50 static device *root_device;
  51 static const char *register_names[] = REGISTER_NAMES;
  52
  53 void
  54 sim_open (char *args)
  55 {
  56   /* Note: The simulation is not created by sim_open() because
  57      complete information is not yet available */
  58   /* trace the call */
  59   TRACE(trace_gdb, ("sim_open(args=%s) called\n", args ? args : "(null)"));
  60
  61   if (root_device != NULL)
  62     printf_filtered("Warning - re-open of simulator leaks memory\n");
  63   root_device = psim_tree();
  64   simulator = NULL;
  65
  66   if (args) {
  67     char **argv = buildargv(args);
  68     psim_options(root_device, argv);
  69     freeargv(argv);
  70   }
  71
  72   if (ppc_trace[trace_opts])
  73     print_options ();
  74 }
  75
  76
  77 void
  78 sim_close (int quitting)
  79 {
  80   TRACE(trace_gdb, ("sim_close(quitting=%d) called\n", quitting));
  81   if (ppc_trace[trace_print_info] && simulator != NULL)
  82     psim_print_info (simulator, ppc_trace[trace_print_info]);
  83 }
  84
  85
  86 int
  87 sim_load (char *prog, int from_tty)
  88 {
  89   char **argv;
  90   TRACE(trace_gdb, ("sim_load(prog=%s, from_tty=%d) called\n",
  91                     prog, from_tty));
  92   ASSERT(prog != NULL);
  93
  94   /* parse the arguments, assume that the file is argument 0 */
  95   argv = buildargv(prog);
  96   ASSERT(argv != NULL && argv[0] != NULL);
  97
  98   /* create the simulator */
  99   TRACE(trace_gdb, ("sim_load() - first time, create the simulator\n"));
 100   simulator = psim_create(argv[0], root_device);
 101
 102   /* bring in all the data section */
 103   psim_init(simulator);
 104
 105   /* release the arguments */
 106   freeargv(argv);
 107
 108   /* `I did it my way' */
 109   return 0;
 110 }
 111
 112
 113 void
 114 sim_kill (void)
 115 {
 116   TRACE(trace_gdb, ("sim_kill(void) called\n"));
 117   /* do nothing, nothing to do */
 118 }
 119
 120
 121 int
 122 sim_read (SIM_ADDR mem, unsigned char *buf, int length)
 123 {
 124   int result = psim_read_memory(simulator, MAX_NR_PROCESSORS,
 125                                 buf, mem, length);
 126   TRACE(trace_gdb, ("sim_read(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 127                     (long)mem, (long)buf, length, result));
 128   return result;
 129 }
 130
 131
 132 int
 133 sim_write (SIM_ADDR mem, unsigned char *buf, int length)
 134 {
 135   int result = psim_write_memory(simulator, MAX_NR_PROCESSORS,
 136                                  buf, mem, length,
 137                                  1/*violate_ro*/);
 138   TRACE(trace_gdb, ("sim_write(mem=0x%lx, buf=0x%lx, length=%d) = %d\n",
 139                     (long)mem, (long)buf, length, result));
 140   return result;
 141 }
 142
 143
 144 void
 145 sim_fetch_register (int regno, unsigned char *buf)
 146 {
 147   if (simulator == NULL) {
 148     return;
 149   }
 150   TRACE(trace_gdb, ("sim_fetch_register(regno=%d(%s), buf=0x%lx)\n",
 151                     regno, register_names[regno], (long)buf));
 152   psim_read_register(simulator, MAX_NR_PROCESSORS,
 153                      buf, register_names[regno],
 154                      raw_transfer);
 155 }
 156
 157
 158 void
 159 sim_store_register (int regno, unsigned char *buf)
 160 {
 161   if (simulator == NULL)
 162     return;
 163   TRACE(trace_gdb, ("sim_store_register(regno=%d(%s), buf=0x%lx)\n",
 164                     regno, register_names[regno], (long)buf));
 165   psim_write_register(simulator, MAX_NR_PROCESSORS,
 166                       buf, register_names[regno],
 167                       raw_transfer);
 168 }
 169
 170
 171 void
 172 sim_info (int verbose)
 173 {
 174   TRACE(trace_gdb, ("sim_info(verbose=%d) called\n", verbose));
 175   psim_print_info (simulator, verbose);
 176 }
 177
 178
 179 void
 180 sim_create_inferior (SIM_ADDR start_address, char **argv, char **envp)
 181 {
 182   unsigned_word entry_point = start_address;
 183
 184   TRACE(trace_gdb, ("sim_create_inferior(start_address=0x%x, ...)\n",
 185                     start_address));
 186
 187   psim_init(simulator);
 188   psim_stack(simulator, argv, envp);
 189
 190   psim_write_register(simulator, -1 /* all start at same PC */,
 191                       &entry_point, "pc", cooked_transfer);
 192 }
 193
 194
 195 static volatile int sim_should_run;
 196
 197 void
 198 sim_stop_reason (enum sim_stop *reason, int *sigrc)
 199 {
 200   psim_status status = psim_get_status(simulator);
 201
 202   switch (CURRENT_ENVIRONMENT) {
 203
 204   case USER_ENVIRONMENT:
 205   case VIRTUAL_ENVIRONMENT:
 206     switch (status.reason) {
 207     case was_continuing:
 208       *reason = sim_stopped;
 209       *sigrc = SIGTRAP;
 210       if (sim_should_run) {
 211         error("sim_stop_reason() unknown reason for halt\n");
 212       }
 213       break;
 214     case was_trap:
 215       *reason = sim_stopped;
 216       *sigrc = SIGTRAP;
 217       break;
 218     case was_exited:
 219       *reason = sim_exited;
 220       *sigrc = 0;
 221       break;
 222     case was_signalled:
 223       *reason = sim_signalled;
 224       *sigrc = status.signal;
 225       break;
 226     }
 227     break;
 228
 229   case OPERATING_ENVIRONMENT:
 230     *reason = sim_stopped;
 231     *sigrc = SIGTRAP;
 232     break;
 233
 234   default:
 235     error("sim_stop_reason() - unknown environment\n");
 236
 237   }
 238
 239   TRACE(trace_gdb, ("sim_stop_reason(reason=0x%lx(%ld), sigrc=0x%lx(%ld))\n",
 240                     (long)reason, (long)*reason, (long)sigrc, (long)*sigrc));
 241 }
 242
 243
 244
 245 /* Run (or resume) the program.  */
 246 static void
 247 sim_ctrl_c()
 248 {
 249   sim_should_run = 0;
 250 }
 251
 252 void
 253 sim_resume (int step, int siggnal)
 254 {
 255   void (*prev) ();
 256
 257   TRACE(trace_gdb, ("sim_resume(step=%d, siggnal=%d)\n",
 258                     step, siggnal));
 259
 260   prev = signal(SIGINT, sim_ctrl_c);
 261   sim_should_run = 1;
 262
 263   if (step)
 264     psim_step(simulator);
 265   else
 266     psim_run_until_stop(simulator, &sim_should_run);
 267
 268   signal(SIGINT, prev);
 269 }
 270
 271 void
 272 sim_do_command (char *cmd)
 273 {
 274   TRACE(trace_gdb, ("sim_do_commands(cmd=%s) called\n",
 275                     cmd ? cmd : "(null)"));
 276   if (cmd) {
 277     char **argv = buildargv(cmd);
 278     psim_options(root_device, argv);
 279     freeargv(argv);
 280   }
 281 }
 282
 283 void
 284 sim_set_callbacks (host_callback *callback)
 285 {
 286   TRACE(trace_gdb, ("sim_set_callbacks called\n"));
 287 }
 288
 289 /****/
 290
 291 void *
 292 zalloc(long size)
 293 {
 294   void *memory = (void*)xmalloc(size);
 295   if (memory == NULL)
 296     error("xmalloc failed\n");
 297   memset(memory, 0, size);
 298   return memory;
 299 }
 300
 301 void zfree(void *data)
 302 {
 303   mfree(NULL, data);
 304 }
 305
 306 void flush_stdoutput(void)
 307 {
 308   gdb_flush (gdb_stdout);
 309 }