| 1 | /* Generic remote debugging interface for simulators. |
| 2 | Copyright 1993, 1994, 1996, 1997 Free Software Foundation, Inc. |
| 3 | Contributed by Cygnus Support. |
| 4 | Steve Chamberlain (sac@cygnus.com). |
| 5 | |
| 6 | This file is part of GDB. |
| 7 | |
| 8 | This program is free software; you can redistribute it and/or modify |
| 9 | it under the terms of the GNU General Public License as published by |
| 10 | the Free Software Foundation; either version 2 of the License, or |
| 11 | (at your option) any later version. |
| 12 | |
| 13 | This program is distributed in the hope that it will be useful, |
| 14 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 16 | GNU General Public License for more details. |
| 17 | |
| 18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program; if not, write to the Free Software |
| 20 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
| 21 | |
| 22 | #include "defs.h" |
| 23 | #include "inferior.h" |
| 24 | #include "wait.h" |
| 25 | #include "value.h" |
| 26 | #include "gdb_string.h" |
| 27 | #include <ctype.h> |
| 28 | #include <fcntl.h> |
| 29 | #include <signal.h> |
| 30 | #include <setjmp.h> |
| 31 | #include <errno.h> |
| 32 | #include "terminal.h" |
| 33 | #include "target.h" |
| 34 | #include "gdbcore.h" |
| 35 | #include "callback.h" |
| 36 | #include "remote-sim.h" |
| 37 | #include "remote-utils.h" |
| 38 | |
| 39 | /* Prototypes */ |
| 40 | |
| 41 | static void dump_mem PARAMS ((char *buf, int len)); |
| 42 | |
| 43 | static void init_callbacks PARAMS ((void)); |
| 44 | |
| 45 | static void end_callbacks PARAMS ((void)); |
| 46 | |
| 47 | static int gdb_os_write_stdout PARAMS ((host_callback *, const char *, int)); |
| 48 | |
| 49 | static void gdb_os_flush_stdout PARAMS ((host_callback *)); |
| 50 | |
| 51 | static int gdb_os_write_stderr PARAMS ((host_callback *, const char *, int)); |
| 52 | |
| 53 | static void gdb_os_flush_stderr PARAMS ((host_callback *)); |
| 54 | |
| 55 | /* printf_filtered is depreciated */ |
| 56 | static void gdb_os_printf_filtered PARAMS ((host_callback *, const char *, ...)); |
| 57 | |
| 58 | static void gdb_os_vprintf_filtered PARAMS ((host_callback *, const char *, va_list)); |
| 59 | |
| 60 | static void gdb_os_evprintf_filtered PARAMS ((host_callback *, const char *, va_list)); |
| 61 | |
| 62 | static void gdb_os_error PARAMS ((host_callback *, const char *, ...)); |
| 63 | |
| 64 | static void gdbsim_fetch_register PARAMS ((int regno)); |
| 65 | |
| 66 | static void gdbsim_store_register PARAMS ((int regno)); |
| 67 | |
| 68 | static void gdbsim_kill PARAMS ((void)); |
| 69 | |
| 70 | static void gdbsim_load PARAMS ((char *prog, int fromtty)); |
| 71 | |
| 72 | static void gdbsim_create_inferior PARAMS ((char *exec_file, char *args, char **env)); |
| 73 | |
| 74 | static void gdbsim_open PARAMS ((char *args, int from_tty)); |
| 75 | |
| 76 | static void gdbsim_close PARAMS ((int quitting)); |
| 77 | |
| 78 | static void gdbsim_detach PARAMS ((char *args, int from_tty)); |
| 79 | |
| 80 | static void gdbsim_resume PARAMS ((int pid, int step, enum target_signal siggnal)); |
| 81 | |
| 82 | static int gdbsim_wait PARAMS ((int pid, struct target_waitstatus *status)); |
| 83 | |
| 84 | static void gdbsim_prepare_to_store PARAMS ((void)); |
| 85 | |
| 86 | static int gdbsim_xfer_inferior_memory PARAMS ((CORE_ADDR memaddr, |
| 87 | char *myaddr, int len, |
| 88 | int write, |
| 89 | struct target_ops *target)); |
| 90 | |
| 91 | static void gdbsim_files_info PARAMS ((struct target_ops *target)); |
| 92 | |
| 93 | static void gdbsim_mourn_inferior PARAMS ((void)); |
| 94 | |
| 95 | static void simulator_command PARAMS ((char *args, int from_tty)); |
| 96 | |
| 97 | /* Naming convention: |
| 98 | |
| 99 | sim_* are the interface to the simulator (see remote-sim.h). |
| 100 | gdbsim_* are stuff which is internal to gdb. */ |
| 101 | |
| 102 | /* Forward data declarations */ |
| 103 | extern struct target_ops gdbsim_ops; |
| 104 | |
| 105 | static int program_loaded = 0; |
| 106 | |
| 107 | /* We must keep track of whether the simulator has been opened or not because |
| 108 | GDB can call a target's close routine twice, but sim_close doesn't allow |
| 109 | this. We also need to record the result of sim_open so we can pass it |
| 110 | back to the other sim_foo routines. */ |
| 111 | static SIM_DESC gdbsim_desc = 0; |
| 112 | |
| 113 | static void |
| 114 | dump_mem (buf, len) |
| 115 | char *buf; |
| 116 | int len; |
| 117 | { |
| 118 | if (len <= 8) |
| 119 | { |
| 120 | if (len == 8 || len == 4) |
| 121 | { |
| 122 | long l[2]; |
| 123 | memcpy (l, buf, len); |
| 124 | printf_filtered ("\t0x%x", l[0]); |
| 125 | printf_filtered (len == 8 ? " 0x%x\n" : "\n", l[1]); |
| 126 | } |
| 127 | else |
| 128 | { |
| 129 | int i; |
| 130 | printf_filtered ("\t"); |
| 131 | for (i = 0; i < len; i++) |
| 132 | printf_filtered ("0x%x ", buf[i]); |
| 133 | printf_filtered ("\n"); |
| 134 | } |
| 135 | } |
| 136 | } |
| 137 | |
| 138 | static host_callback gdb_callback; |
| 139 | static int callbacks_initialized = 0; |
| 140 | |
| 141 | /* Initialize gdb_callback. */ |
| 142 | |
| 143 | static void |
| 144 | init_callbacks () |
| 145 | { |
| 146 | if (! callbacks_initialized) |
| 147 | { |
| 148 | gdb_callback = default_callback; |
| 149 | gdb_callback.init (&gdb_callback); |
| 150 | gdb_callback.write_stdout = gdb_os_write_stdout; |
| 151 | gdb_callback.flush_stdout = gdb_os_flush_stdout; |
| 152 | gdb_callback.write_stderr = gdb_os_write_stderr; |
| 153 | gdb_callback.flush_stderr = gdb_os_flush_stderr; |
| 154 | gdb_callback.printf_filtered = gdb_os_printf_filtered; |
| 155 | gdb_callback.vprintf_filtered = gdb_os_vprintf_filtered; |
| 156 | gdb_callback.evprintf_filtered = gdb_os_evprintf_filtered; |
| 157 | gdb_callback.error = gdb_os_error; |
| 158 | sim_set_callbacks (gdbsim_desc, &gdb_callback); |
| 159 | callbacks_initialized = 1; |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | /* Release callbacks (free resources used by them). */ |
| 164 | |
| 165 | static void |
| 166 | end_callbacks () |
| 167 | { |
| 168 | if (callbacks_initialized) |
| 169 | { |
| 170 | gdb_callback.shutdown (&gdb_callback); |
| 171 | callbacks_initialized = 0; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | /* GDB version of os_write_stdout callback. */ |
| 176 | |
| 177 | static int |
| 178 | gdb_os_write_stdout (p, buf, len) |
| 179 | host_callback *p; |
| 180 | const char *buf; |
| 181 | int len; |
| 182 | { |
| 183 | int i; |
| 184 | char b[2]; |
| 185 | |
| 186 | for (i = 0; i < len; i++) |
| 187 | { |
| 188 | b[0] = buf[i]; |
| 189 | b[1] = 0; |
| 190 | if (target_output_hook) |
| 191 | target_output_hook (b); |
| 192 | else |
| 193 | fputs_filtered (b, gdb_stdout); |
| 194 | } |
| 195 | return len; |
| 196 | } |
| 197 | |
| 198 | /* GDB version of os_flush_stdout callback. */ |
| 199 | |
| 200 | static void |
| 201 | gdb_os_flush_stdout (p) |
| 202 | host_callback *p; |
| 203 | { |
| 204 | gdb_flush (gdb_stdout); |
| 205 | } |
| 206 | |
| 207 | /* GDB version of os_write_stderr callback. */ |
| 208 | |
| 209 | static int |
| 210 | gdb_os_write_stderr (p, buf, len) |
| 211 | host_callback *p; |
| 212 | const char *buf; |
| 213 | int len; |
| 214 | { |
| 215 | int i; |
| 216 | char b[2]; |
| 217 | |
| 218 | for (i = 0; i < len; i++) |
| 219 | { |
| 220 | b[0] = buf[i]; |
| 221 | b[1] = 0; |
| 222 | if (target_output_hook) |
| 223 | target_output_hook (b); |
| 224 | else |
| 225 | fputs_filtered (b, gdb_stderr); |
| 226 | } |
| 227 | return len; |
| 228 | } |
| 229 | |
| 230 | /* GDB version of os_flush_stderr callback. */ |
| 231 | |
| 232 | static void |
| 233 | gdb_os_flush_stderr (p) |
| 234 | host_callback *p; |
| 235 | { |
| 236 | gdb_flush (gdb_stderr); |
| 237 | } |
| 238 | |
| 239 | /* GDB version of printf_filtered callback. */ |
| 240 | |
| 241 | /* VARARGS */ |
| 242 | static void |
| 243 | #ifdef ANSI_PROTOTYPES |
| 244 | gdb_os_printf_filtered (host_callback *p, const char *format, ...) |
| 245 | #else |
| 246 | gdb_os_printf_filtered (p, va_alist) |
| 247 | host_callback *p; |
| 248 | va_dcl |
| 249 | #endif |
| 250 | { |
| 251 | va_list args; |
| 252 | #ifdef ANSI_PROTOTYPES |
| 253 | va_start (args, format); |
| 254 | #else |
| 255 | char *format; |
| 256 | |
| 257 | va_start (args); |
| 258 | format = va_arg (args, char *); |
| 259 | #endif |
| 260 | |
| 261 | vfprintf_filtered (gdb_stdout, format, args); |
| 262 | |
| 263 | va_end (args); |
| 264 | } |
| 265 | |
| 266 | /* GDB version of error vprintf_filtered. */ |
| 267 | |
| 268 | /* VARARGS */ |
| 269 | static void |
| 270 | #ifdef ANSI_PROTOTYPES |
| 271 | gdb_os_vprintf_filtered (host_callback *p, const char *format, va_list ap) |
| 272 | #else |
| 273 | gdb_os_vprintf_filtered (p, format, ap) |
| 274 | host_callback *p; |
| 275 | char *format; |
| 276 | va_list ap; |
| 277 | #endif |
| 278 | { |
| 279 | vfprintf_filtered (gdb_stdout, format, ap); |
| 280 | } |
| 281 | |
| 282 | /* GDB version of error evprintf_filtered. */ |
| 283 | |
| 284 | /* VARARGS */ |
| 285 | static void |
| 286 | #ifdef ANSI_PROTOTYPES |
| 287 | gdb_os_evprintf_filtered (host_callback *p, const char *format, va_list ap) |
| 288 | #else |
| 289 | gdb_os_evprintf_filtered (p, format, ap) |
| 290 | host_callback *p; |
| 291 | char *format; |
| 292 | va_list ap; |
| 293 | #endif |
| 294 | { |
| 295 | vfprintf_filtered (gdb_stderr, format, ap); |
| 296 | } |
| 297 | |
| 298 | /* GDB version of error callback. */ |
| 299 | |
| 300 | /* VARARGS */ |
| 301 | static void |
| 302 | #ifdef ANSI_PROTOTYPES |
| 303 | gdb_os_error (host_callback *p, const char *format, ...) |
| 304 | #else |
| 305 | gdb_os_error (p, va_alist) |
| 306 | host_callback *p; |
| 307 | va_dcl |
| 308 | #endif |
| 309 | { |
| 310 | if (error_hook) |
| 311 | (*error_hook) (); |
| 312 | else |
| 313 | { |
| 314 | va_list args; |
| 315 | #ifdef ANSI_PROTOTYPES |
| 316 | va_start (args, format); |
| 317 | #else |
| 318 | char *format; |
| 319 | |
| 320 | va_start (args); |
| 321 | format = va_arg (args, char *); |
| 322 | #endif |
| 323 | |
| 324 | error_begin (); |
| 325 | vfprintf_filtered (gdb_stderr, format, args); |
| 326 | fprintf_filtered (gdb_stderr, "\n"); |
| 327 | va_end (args); |
| 328 | return_to_top_level (RETURN_ERROR); |
| 329 | } |
| 330 | } |
| 331 | |
| 332 | static void |
| 333 | gdbsim_fetch_register (regno) |
| 334 | int regno; |
| 335 | { |
| 336 | if (regno == -1) |
| 337 | { |
| 338 | for (regno = 0; regno < NUM_REGS; regno++) |
| 339 | gdbsim_fetch_register (regno); |
| 340 | } |
| 341 | else |
| 342 | { |
| 343 | char buf[MAX_REGISTER_RAW_SIZE]; |
| 344 | |
| 345 | sim_fetch_register (gdbsim_desc, regno, buf); |
| 346 | supply_register (regno, buf); |
| 347 | if (sr_get_debug ()) |
| 348 | { |
| 349 | printf_filtered ("gdbsim_fetch_register: %d", regno); |
| 350 | /* FIXME: We could print something more intelligible. */ |
| 351 | dump_mem (buf, REGISTER_RAW_SIZE (regno)); |
| 352 | } |
| 353 | } |
| 354 | } |
| 355 | |
| 356 | |
| 357 | static void |
| 358 | gdbsim_store_register (regno) |
| 359 | int regno; |
| 360 | { |
| 361 | if (regno == -1) |
| 362 | { |
| 363 | for (regno = 0; regno < NUM_REGS; regno++) |
| 364 | gdbsim_store_register (regno); |
| 365 | } |
| 366 | else |
| 367 | { |
| 368 | /* FIXME: Until read_register() returns LONGEST, we have this. */ |
| 369 | char tmp[MAX_REGISTER_RAW_SIZE]; |
| 370 | read_register_gen (regno, tmp); |
| 371 | sim_store_register (gdbsim_desc, regno, tmp); |
| 372 | if (sr_get_debug ()) |
| 373 | { |
| 374 | printf_filtered ("gdbsim_store_register: %d", regno); |
| 375 | /* FIXME: We could print something more intelligible. */ |
| 376 | dump_mem (tmp, REGISTER_RAW_SIZE (regno)); |
| 377 | } |
| 378 | } |
| 379 | } |
| 380 | |
| 381 | /* Kill the running program. This may involve closing any open files |
| 382 | and releasing other resources acquired by the simulated program. */ |
| 383 | |
| 384 | static void |
| 385 | gdbsim_kill () |
| 386 | { |
| 387 | if (sr_get_debug ()) |
| 388 | printf_filtered ("gdbsim_kill\n"); |
| 389 | |
| 390 | sim_kill (gdbsim_desc); /* close fd's, remove mappings, etc. */ |
| 391 | inferior_pid = 0; |
| 392 | } |
| 393 | |
| 394 | /* Load an executable file into the target process. This is expected to |
| 395 | not only bring new code into the target process, but also to update |
| 396 | GDB's symbol tables to match. */ |
| 397 | |
| 398 | static void |
| 399 | gdbsim_load (prog, fromtty) |
| 400 | char *prog; |
| 401 | int fromtty; |
| 402 | { |
| 403 | if (sr_get_debug ()) |
| 404 | printf_filtered ("gdbsim_load: prog \"%s\"\n", prog); |
| 405 | |
| 406 | inferior_pid = 0; |
| 407 | |
| 408 | /* This must be done before calling gr_load_image. */ |
| 409 | program_loaded = 1; |
| 410 | |
| 411 | if (sim_load (gdbsim_desc, prog, fromtty) != 0) |
| 412 | generic_load (prog, fromtty); |
| 413 | } |
| 414 | |
| 415 | |
| 416 | /* Start an inferior process and set inferior_pid to its pid. |
| 417 | EXEC_FILE is the file to run. |
| 418 | ARGS is a string containing the arguments to the program. |
| 419 | ENV is the environment vector to pass. Errors reported with error(). |
| 420 | On VxWorks and various standalone systems, we ignore exec_file. */ |
| 421 | /* This is called not only when we first attach, but also when the |
| 422 | user types "run" after having attached. */ |
| 423 | |
| 424 | static void |
| 425 | gdbsim_create_inferior (exec_file, args, env) |
| 426 | char *exec_file; |
| 427 | char *args; |
| 428 | char **env; |
| 429 | { |
| 430 | int len; |
| 431 | char *arg_buf,**argv; |
| 432 | CORE_ADDR entry_pt; |
| 433 | |
| 434 | if (! program_loaded) |
| 435 | error ("No program loaded."); |
| 436 | |
| 437 | if (sr_get_debug ()) |
| 438 | printf_filtered ("gdbsim_create_inferior: exec_file \"%s\", args \"%s\"\n", |
| 439 | exec_file, args); |
| 440 | |
| 441 | if (exec_file == 0 || exec_bfd == 0) |
| 442 | error ("No exec file specified."); |
| 443 | |
| 444 | entry_pt = (CORE_ADDR) bfd_get_start_address (exec_bfd); |
| 445 | |
| 446 | gdbsim_kill (); |
| 447 | remove_breakpoints (); |
| 448 | init_wait_for_inferior (); |
| 449 | |
| 450 | len = strlen (exec_file) + 1 + strlen (args) + 1 + /*slop*/ 10; |
| 451 | arg_buf = (char *) alloca (len); |
| 452 | arg_buf[0] = '\0'; |
| 453 | strcat (arg_buf, exec_file); |
| 454 | strcat (arg_buf, " "); |
| 455 | strcat (arg_buf, args); |
| 456 | argv = buildargv (arg_buf); |
| 457 | make_cleanup (freeargv, (char *) argv); |
| 458 | sim_create_inferior (gdbsim_desc, entry_pt, argv, env); |
| 459 | |
| 460 | inferior_pid = 42; |
| 461 | insert_breakpoints (); /* Needed to get correct instruction in cache */ |
| 462 | proceed (entry_pt, TARGET_SIGNAL_DEFAULT, 0); |
| 463 | } |
| 464 | |
| 465 | /* The open routine takes the rest of the parameters from the command, |
| 466 | and (if successful) pushes a new target onto the stack. |
| 467 | Targets should supply this routine, if only to provide an error message. */ |
| 468 | /* Called when selecting the simulator. EG: (gdb) target sim name. */ |
| 469 | |
| 470 | static void |
| 471 | gdbsim_open (args, from_tty) |
| 472 | char *args; |
| 473 | int from_tty; |
| 474 | { |
| 475 | int len; |
| 476 | char *arg_buf; |
| 477 | char **argv; |
| 478 | |
| 479 | if (sr_get_debug ()) |
| 480 | printf_filtered ("gdbsim_open: args \"%s\"\n", args ? args : "(null)"); |
| 481 | |
| 482 | /* Remove current simulator if one exists. Only do this if the simulator |
| 483 | has been opened because sim_close requires it. |
| 484 | This is important because the call to push_target below will cause |
| 485 | sim_close to be called if the simulator is already open, but push_target |
| 486 | is called after sim_open! We can't move the call to push_target before |
| 487 | the call to sim_open because sim_open may invoke `error'. */ |
| 488 | if (gdbsim_desc != NULL) |
| 489 | unpush_target (&gdbsim_ops); |
| 490 | |
| 491 | init_callbacks (); |
| 492 | |
| 493 | len = 7 + 1 + (args ? strlen (args) : 0) + 1 + /*slop*/ 10; |
| 494 | arg_buf = (char *) alloca (len); |
| 495 | strcpy (arg_buf, "gdbsim"); |
| 496 | if (args) |
| 497 | { |
| 498 | strcat (arg_buf, " "); |
| 499 | strcat (arg_buf, args); |
| 500 | } |
| 501 | argv = buildargv (arg_buf); |
| 502 | if (argv == NULL) |
| 503 | error ("Insufficient memory available to allocate simulator arg list."); |
| 504 | make_cleanup (freeargv, (char *) argv); |
| 505 | |
| 506 | gdbsim_desc = sim_open (SIM_OPEN_DEBUG, argv); |
| 507 | if (gdbsim_desc == 0) |
| 508 | error ("unable to create simulator instance"); |
| 509 | |
| 510 | push_target (&gdbsim_ops); |
| 511 | target_fetch_registers (-1); |
| 512 | printf_filtered ("Connected to the simulator.\n"); |
| 513 | } |
| 514 | |
| 515 | /* Does whatever cleanup is required for a target that we are no longer |
| 516 | going to be calling. Argument says whether we are quitting gdb and |
| 517 | should not get hung in case of errors, or whether we want a clean |
| 518 | termination even if it takes a while. This routine is automatically |
| 519 | always called just before a routine is popped off the target stack. |
| 520 | Closing file descriptors and freeing memory are typical things it should |
| 521 | do. */ |
| 522 | /* Close out all files and local state before this target loses control. */ |
| 523 | |
| 524 | static void |
| 525 | gdbsim_close (quitting) |
| 526 | int quitting; |
| 527 | { |
| 528 | if (sr_get_debug ()) |
| 529 | printf_filtered ("gdbsim_close: quitting %d\n", quitting); |
| 530 | |
| 531 | program_loaded = 0; |
| 532 | |
| 533 | if (gdbsim_desc != NULL) |
| 534 | { |
| 535 | sim_close (gdbsim_desc, quitting); |
| 536 | gdbsim_desc = NULL; |
| 537 | } |
| 538 | |
| 539 | end_callbacks (); |
| 540 | } |
| 541 | |
| 542 | /* Takes a program previously attached to and detaches it. |
| 543 | The program may resume execution (some targets do, some don't) and will |
| 544 | no longer stop on signals, etc. We better not have left any breakpoints |
| 545 | in the program or it'll die when it hits one. ARGS is arguments |
| 546 | typed by the user (e.g. a signal to send the process). FROM_TTY |
| 547 | says whether to be verbose or not. */ |
| 548 | /* Terminate the open connection to the remote debugger. |
| 549 | Use this when you want to detach and do something else with your gdb. */ |
| 550 | |
| 551 | static void |
| 552 | gdbsim_detach (args,from_tty) |
| 553 | char *args; |
| 554 | int from_tty; |
| 555 | { |
| 556 | if (sr_get_debug ()) |
| 557 | printf_filtered ("gdbsim_detach: args \"%s\"\n", args); |
| 558 | |
| 559 | pop_target (); /* calls gdbsim_close to do the real work */ |
| 560 | if (from_tty) |
| 561 | printf_filtered ("Ending simulator %s debugging\n", target_shortname); |
| 562 | } |
| 563 | |
| 564 | /* Resume execution of the target process. STEP says whether to single-step |
| 565 | or to run free; SIGGNAL is the signal value (e.g. SIGINT) to be given |
| 566 | to the target, or zero for no signal. */ |
| 567 | |
| 568 | static void |
| 569 | gdbsim_resume (pid, step, siggnal) |
| 570 | int pid, step; |
| 571 | enum target_signal siggnal; |
| 572 | { |
| 573 | if (inferior_pid != 42) |
| 574 | error ("The program is not being run."); |
| 575 | |
| 576 | if (sr_get_debug ()) |
| 577 | printf_filtered ("gdbsim_resume: step %d, signal %d\n", step, siggnal); |
| 578 | |
| 579 | sim_resume (gdbsim_desc, step, target_signal_to_host (siggnal)); |
| 580 | } |
| 581 | |
| 582 | /* Wait for inferior process to do something. Return pid of child, |
| 583 | or -1 in case of error; store status through argument pointer STATUS, |
| 584 | just as `wait' would. */ |
| 585 | |
| 586 | static int |
| 587 | gdbsim_wait (pid, status) |
| 588 | int pid; |
| 589 | struct target_waitstatus *status; |
| 590 | { |
| 591 | int sigrc; |
| 592 | enum sim_stop reason; |
| 593 | |
| 594 | if (sr_get_debug ()) |
| 595 | printf_filtered ("gdbsim_wait\n"); |
| 596 | |
| 597 | sim_stop_reason (gdbsim_desc, &reason, &sigrc); |
| 598 | switch (reason) |
| 599 | { |
| 600 | case sim_exited: |
| 601 | status->kind = TARGET_WAITKIND_EXITED; |
| 602 | status->value.integer = sigrc; |
| 603 | break; |
| 604 | case sim_stopped: |
| 605 | status->kind = TARGET_WAITKIND_STOPPED; |
| 606 | /* The signal in sigrc is a host signal. That probably |
| 607 | should be fixed. */ |
| 608 | status->value.sig = target_signal_from_host (sigrc); |
| 609 | break; |
| 610 | case sim_signalled: |
| 611 | status->kind = TARGET_WAITKIND_SIGNALLED; |
| 612 | /* The signal in sigrc is a host signal. That probably |
| 613 | should be fixed. */ |
| 614 | status->value.sig = target_signal_from_host (sigrc); |
| 615 | break; |
| 616 | } |
| 617 | |
| 618 | return inferior_pid; |
| 619 | } |
| 620 | |
| 621 | /* Get ready to modify the registers array. On machines which store |
| 622 | individual registers, this doesn't need to do anything. On machines |
| 623 | which store all the registers in one fell swoop, this makes sure |
| 624 | that registers contains all the registers from the program being |
| 625 | debugged. */ |
| 626 | |
| 627 | static void |
| 628 | gdbsim_prepare_to_store () |
| 629 | { |
| 630 | /* Do nothing, since we can store individual regs */ |
| 631 | } |
| 632 | |
| 633 | static int |
| 634 | gdbsim_xfer_inferior_memory (memaddr, myaddr, len, write, target) |
| 635 | CORE_ADDR memaddr; |
| 636 | char *myaddr; |
| 637 | int len; |
| 638 | int write; |
| 639 | struct target_ops *target; /* ignored */ |
| 640 | { |
| 641 | if (! program_loaded) |
| 642 | error ("No program loaded."); |
| 643 | |
| 644 | if (sr_get_debug ()) |
| 645 | { |
| 646 | printf_filtered ("gdbsim_xfer_inferior_memory: myaddr 0x%x, memaddr 0x%x, len %d, write %d\n", |
| 647 | myaddr, memaddr, len, write); |
| 648 | if (sr_get_debug () && write) |
| 649 | dump_mem(myaddr, len); |
| 650 | } |
| 651 | |
| 652 | if (write) |
| 653 | { |
| 654 | len = sim_write (gdbsim_desc, memaddr, myaddr, len); |
| 655 | } |
| 656 | else |
| 657 | { |
| 658 | len = sim_read (gdbsim_desc, memaddr, myaddr, len); |
| 659 | if (sr_get_debug () && len > 0) |
| 660 | dump_mem(myaddr, len); |
| 661 | } |
| 662 | return len; |
| 663 | } |
| 664 | |
| 665 | static void |
| 666 | gdbsim_files_info (target) |
| 667 | struct target_ops *target; |
| 668 | { |
| 669 | char *file = "nothing"; |
| 670 | |
| 671 | if (exec_bfd) |
| 672 | file = bfd_get_filename (exec_bfd); |
| 673 | |
| 674 | if (sr_get_debug ()) |
| 675 | printf_filtered ("gdbsim_files_info: file \"%s\"\n", file); |
| 676 | |
| 677 | if (exec_bfd) |
| 678 | { |
| 679 | printf_filtered ("\tAttached to %s running program %s\n", |
| 680 | target_shortname, file); |
| 681 | sim_info (gdbsim_desc, 0); |
| 682 | } |
| 683 | } |
| 684 | |
| 685 | /* Clear the simulator's notion of what the break points are. */ |
| 686 | |
| 687 | static void |
| 688 | gdbsim_mourn_inferior () |
| 689 | { |
| 690 | if (sr_get_debug ()) |
| 691 | printf_filtered ("gdbsim_mourn_inferior:\n"); |
| 692 | |
| 693 | remove_breakpoints (); |
| 694 | generic_mourn_inferior (); |
| 695 | } |
| 696 | |
| 697 | /* Pass the command argument through to the simulator verbatim. The |
| 698 | simulator must do any command interpretation work. */ |
| 699 | |
| 700 | static void |
| 701 | simulator_command (args, from_tty) |
| 702 | char *args; |
| 703 | int from_tty; |
| 704 | { |
| 705 | /* The user may give a command before the simulator is opened, so |
| 706 | ensure that the callbacks have been set up. */ |
| 707 | init_callbacks (); |
| 708 | |
| 709 | /* Note that if the simulator hasn't been opened, gdbsim_desc == NULL |
| 710 | which is correct (??? assuming of course one wishes to continue to |
| 711 | allow commands to be sent to unopened simulators, which isn't entirely |
| 712 | unreasonable). Simulators should be prepared to deal with any |
| 713 | combination of NULL or empty args. */ |
| 714 | sim_do_command (gdbsim_desc, args); |
| 715 | } |
| 716 | |
| 717 | /* Define the target subroutine names */ |
| 718 | |
| 719 | struct target_ops gdbsim_ops = { |
| 720 | "sim", /* to_shortname */ |
| 721 | "simulator", /* to_longname */ |
| 722 | "Use the compiled-in simulator.", /* to_doc */ |
| 723 | gdbsim_open, /* to_open */ |
| 724 | gdbsim_close, /* to_close */ |
| 725 | NULL, /* to_attach */ |
| 726 | gdbsim_detach, /* to_detach */ |
| 727 | gdbsim_resume, /* to_resume */ |
| 728 | gdbsim_wait, /* to_wait */ |
| 729 | gdbsim_fetch_register, /* to_fetch_registers */ |
| 730 | gdbsim_store_register, /* to_store_registers */ |
| 731 | gdbsim_prepare_to_store, /* to_prepare_to_store */ |
| 732 | gdbsim_xfer_inferior_memory, /* to_xfer_memory */ |
| 733 | gdbsim_files_info, /* to_files_info */ |
| 734 | memory_insert_breakpoint, /* to_insert_breakpoint */ |
| 735 | memory_remove_breakpoint, /* to_remove_breakpoint */ |
| 736 | NULL, /* to_terminal_init */ |
| 737 | NULL, /* to_terminal_inferior */ |
| 738 | NULL, /* to_terminal_ours_for_output */ |
| 739 | NULL, /* to_terminal_ours */ |
| 740 | NULL, /* to_terminal_info */ |
| 741 | gdbsim_kill, /* to_kill */ |
| 742 | gdbsim_load, /* to_load */ |
| 743 | NULL, /* to_lookup_symbol */ |
| 744 | gdbsim_create_inferior, /* to_create_inferior */ |
| 745 | gdbsim_mourn_inferior, /* to_mourn_inferior */ |
| 746 | 0, /* to_can_run */ |
| 747 | 0, /* to_notice_signals */ |
| 748 | 0, /* to_thread_alive */ |
| 749 | 0, /* to_stop */ |
| 750 | process_stratum, /* to_stratum */ |
| 751 | NULL, /* to_next */ |
| 752 | 1, /* to_has_all_memory */ |
| 753 | 1, /* to_has_memory */ |
| 754 | 1, /* to_has_stack */ |
| 755 | 1, /* to_has_registers */ |
| 756 | 1, /* to_has_execution */ |
| 757 | NULL, /* sections */ |
| 758 | NULL, /* sections_end */ |
| 759 | OPS_MAGIC, /* to_magic */ |
| 760 | }; |
| 761 | |
| 762 | void |
| 763 | _initialize_remote_sim () |
| 764 | { |
| 765 | add_target (&gdbsim_ops); |
| 766 | |
| 767 | add_com ("sim <command>", class_obscure, simulator_command, |
| 768 | "Send a command to the simulator."); |
| 769 | } |