1 /* Interface between GDB and target environments, including files and processes 2 Copyright 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc. 3 Contributed by Cygnus Support. Written by John Gilmore. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 2 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program; if not, write to the Free Software 19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 20 21 #if !defined (TARGET_H) 22 #define TARGET_H 23 24 /* This include file defines the interface between the main part 25 of the debugger, and the part which is target-specific, or 26 specific to the communications interface between us and the 27 target. 28 29 A TARGET is an interface between the debugger and a particular 30 kind of file or process. Targets can be STACKED in STRATA, 31 so that more than one target can potentially respond to a request. 32 In particular, memory accesses will walk down the stack of targets 33 until they find a target that is interested in handling that particular 34 address. STRATA are artificial boundaries on the stack, within 35 which particular kinds of targets live. Strata exist so that 36 people don't get confused by pushing e.g. a process target and then 37 a file target, and wondering why they can't see the current values 38 of variables any more (the file target is handling them and they 39 never get to the process target). So when you push a file target, 40 it goes into the file stratum, which is always below the process 41 stratum. */ 42 43 #include "bfd.h" 44 45 enum strata { 46 dummy_stratum, /* The lowest of the low */ 47 file_stratum, /* Executable files, etc */ 48 core_stratum, /* Core dump files */ 49 download_stratum, /* Downloading of remote targets */ 50 process_stratum /* Executing processes */ 51 }; 52 53 /* Stuff for target_wait. */ 54 55 /* Generally, what has the program done? */ 56 enum target_waitkind { 57 /* The program has exited. The exit status is in value.integer. */ 58 TARGET_WAITKIND_EXITED, 59 60 /* The program has stopped with a signal. Which signal is in value.sig. */ 61 TARGET_WAITKIND_STOPPED, 62 63 /* The program has terminated with a signal. Which signal is in 64 value.sig. */ 65 TARGET_WAITKIND_SIGNALLED, 66 67 /* The program is letting us know that it dynamically loaded something 68 (e.g. it called load(2) on AIX). */ 69 TARGET_WAITKIND_LOADED, 70 71 /* Nothing happened, but we stopped anyway. This perhaps should be handled 72 within target_wait, but I'm not sure target_wait should be resuming the 73 inferior. */ 74 TARGET_WAITKIND_SPURIOUS 75 }; 76 77 /* The numbering of these signals is chosen to match traditional unix 78 signals (insofar as various unices use the same numbers, anyway). 79 It is also the numbering of the GDB remote protocol. Other remote 80 protocols, if they use a different numbering, should make sure to 81 translate appropriately. */ 82 83 /* This is based strongly on Unix/POSIX signals for several reasons: 84 (1) This set of signals represents a widely-accepted attempt to 85 represent events of this sort in a portable fashion, (2) we want a 86 signal to make it from wait to child_wait to the user intact, (3) many 87 remote protocols use a similar encoding. However, it is 88 recognized that this set of signals has limitations (such as not 89 distinguishing between various kinds of SIGSEGV, or not 90 distinguishing hitting a breakpoint from finishing a single step). 91 So in the future we may get around this either by adding additional 92 signals for breakpoint, single-step, etc., or by adding signal 93 codes; the latter seems more in the spirit of what BSD, System V, 94 etc. are doing to address these issues. */ 95 96 /* For an explanation of what each signal means, see 97 target_signal_to_string. */ 98 99 enum target_signal { 100 /* Used some places (e.g. stop_signal) to record the concept that 101 there is no signal. */ 102 TARGET_SIGNAL_0 = 0, 103 TARGET_SIGNAL_FIRST = 0, 104 TARGET_SIGNAL_HUP = 1, 105 TARGET_SIGNAL_INT = 2, 106 TARGET_SIGNAL_QUIT = 3, 107 TARGET_SIGNAL_ILL = 4, 108 TARGET_SIGNAL_TRAP = 5, 109 TARGET_SIGNAL_ABRT = 6, 110 TARGET_SIGNAL_EMT = 7, 111 TARGET_SIGNAL_FPE = 8, 112 TARGET_SIGNAL_KILL = 9, 113 TARGET_SIGNAL_BUS = 10, 114 TARGET_SIGNAL_SEGV = 11, 115 TARGET_SIGNAL_SYS = 12, 116 TARGET_SIGNAL_PIPE = 13, 117 TARGET_SIGNAL_ALRM = 14, 118 TARGET_SIGNAL_TERM = 15, 119 TARGET_SIGNAL_URG = 16, 120 TARGET_SIGNAL_STOP = 17, 121 TARGET_SIGNAL_TSTP = 18, 122 TARGET_SIGNAL_CONT = 19, 123 TARGET_SIGNAL_CHLD = 20, 124 TARGET_SIGNAL_TTIN = 21, 125 TARGET_SIGNAL_TTOU = 22, 126 TARGET_SIGNAL_IO = 23, 127 TARGET_SIGNAL_XCPU = 24, 128 TARGET_SIGNAL_XFSZ = 25, 129 TARGET_SIGNAL_VTALRM = 26, 130 TARGET_SIGNAL_PROF = 27, 131 TARGET_SIGNAL_WINCH = 28, 132 TARGET_SIGNAL_LOST = 29, 133 TARGET_SIGNAL_USR1 = 30, 134 TARGET_SIGNAL_USR2 = 31, 135 TARGET_SIGNAL_PWR = 32, 136 /* Similar to SIGIO. Perhaps they should have the same number. */ 137 TARGET_SIGNAL_POLL = 33, 138 TARGET_SIGNAL_WIND = 34, 139 TARGET_SIGNAL_PHONE = 35, 140 TARGET_SIGNAL_WAITING = 36, 141 TARGET_SIGNAL_LWP = 37, 142 TARGET_SIGNAL_DANGER = 38, 143 TARGET_SIGNAL_GRANT = 39, 144 TARGET_SIGNAL_RETRACT = 40, 145 TARGET_SIGNAL_MSG = 41, 146 TARGET_SIGNAL_SOUND = 42, 147 TARGET_SIGNAL_SAK = 43, 148 TARGET_SIGNAL_PRIO = 44, 149 TARGET_SIGNAL_REALTIME_33 = 45, 150 TARGET_SIGNAL_REALTIME_34 = 46, 151 TARGET_SIGNAL_REALTIME_35 = 47, 152 TARGET_SIGNAL_REALTIME_36 = 48, 153 TARGET_SIGNAL_REALTIME_37 = 49, 154 TARGET_SIGNAL_REALTIME_38 = 50, 155 TARGET_SIGNAL_REALTIME_39 = 51, 156 TARGET_SIGNAL_REALTIME_40 = 52, 157 TARGET_SIGNAL_REALTIME_41 = 53, 158 TARGET_SIGNAL_REALTIME_42 = 54, 159 TARGET_SIGNAL_REALTIME_43 = 55, 160 TARGET_SIGNAL_REALTIME_44 = 56, 161 TARGET_SIGNAL_REALTIME_45 = 57, 162 TARGET_SIGNAL_REALTIME_46 = 58, 163 TARGET_SIGNAL_REALTIME_47 = 59, 164 TARGET_SIGNAL_REALTIME_48 = 60, 165 TARGET_SIGNAL_REALTIME_49 = 61, 166 TARGET_SIGNAL_REALTIME_50 = 62, 167 TARGET_SIGNAL_REALTIME_51 = 63, 168 TARGET_SIGNAL_REALTIME_52 = 64, 169 TARGET_SIGNAL_REALTIME_53 = 65, 170 TARGET_SIGNAL_REALTIME_54 = 66, 171 TARGET_SIGNAL_REALTIME_55 = 67, 172 TARGET_SIGNAL_REALTIME_56 = 68, 173 TARGET_SIGNAL_REALTIME_57 = 69, 174 TARGET_SIGNAL_REALTIME_58 = 70, 175 TARGET_SIGNAL_REALTIME_59 = 71, 176 TARGET_SIGNAL_REALTIME_60 = 72, 177 TARGET_SIGNAL_REALTIME_61 = 73, 178 TARGET_SIGNAL_REALTIME_62 = 74, 179 TARGET_SIGNAL_REALTIME_63 = 75, 180 181 /* Mach exceptions */ 182 TARGET_EXC_BAD_ACCESS = 76, 183 TARGET_EXC_BAD_INSTRUCTION = 77, 184 TARGET_EXC_ARITHMETIC = 78, 185 TARGET_EXC_EMULATION = 79, 186 TARGET_EXC_SOFTWARE = 80, 187 TARGET_EXC_BREAKPOINT = 81, 188 189 /* Some signal we don't know about. */ 190 TARGET_SIGNAL_UNKNOWN, 191 192 /* Use whatever signal we use when one is not specifically specified 193 (for passing to proceed and so on). */ 194 TARGET_SIGNAL_DEFAULT, 195 196 /* Last and unused enum value, for sizing arrays, etc. */ 197 TARGET_SIGNAL_LAST 198 }; 199 200 struct target_waitstatus { 201 enum target_waitkind kind; 202 203 /* Exit status or signal number. */ 204 union { 205 int integer; 206 enum target_signal sig; 207 } value; 208 }; 209 210 /* Return the string for a signal. */ 211 extern char *target_signal_to_string PARAMS ((enum target_signal)); 212 213 /* Return the name (SIGHUP, etc.) for a signal. */ 214 extern char *target_signal_to_name PARAMS ((enum target_signal)); 215 216 /* Given a name (SIGHUP, etc.), return its signal. */ 217 enum target_signal target_signal_from_name PARAMS ((char *)); 218 219 /* If certain kinds of activity happen, target_wait should perform 220 callbacks. */ 221 /* Right now we just call (*TARGET_ACTIVITY_FUNCTION) if I/O is possible 222 on TARGET_ACTIVITY_FD. */ 223 extern int target_activity_fd; 224 /* Returns zero to leave the inferior alone, one to interrupt it. */ 225 extern int (*target_activity_function) PARAMS ((void)); 226 227 struct target_ops 228 { 229 char *to_shortname; /* Name this target type */ 230 char *to_longname; /* Name for printing */ 231 char *to_doc; /* Documentation. Does not include trailing 232 newline, and starts with a one-line descrip- 233 tion (probably similar to to_longname). */ 234 void (*to_open) PARAMS ((char *, int)); 235 void (*to_close) PARAMS ((int)); 236 void (*to_attach) PARAMS ((char *, int)); 237 void (*to_detach) PARAMS ((char *, int)); 238 void (*to_resume) PARAMS ((int, int, enum target_signal)); 239 int (*to_wait) PARAMS ((int, struct target_waitstatus *)); 240 void (*to_fetch_registers) PARAMS ((int)); 241 void (*to_store_registers) PARAMS ((int)); 242 void (*to_prepare_to_store) PARAMS ((void)); 243 244 /* Transfer LEN bytes of memory between GDB address MYADDR and 245 target address MEMADDR. If WRITE, transfer them to the target, else 246 transfer them from the target. TARGET is the target from which we 247 get this function. 248 249 Return value, N, is one of the following: 250 251 0 means that we can't handle this. If errno has been set, it is the 252 error which prevented us from doing it (FIXME: What about bfd_error?). 253 254 positive (call it N) means that we have transferred N bytes 255 starting at MEMADDR. We might be able to handle more bytes 256 beyond this length, but no promises. 257 258 negative (call its absolute value N) means that we cannot 259 transfer right at MEMADDR, but we could transfer at least 260 something at MEMADDR + N. */ 261 262 int (*to_xfer_memory) PARAMS ((CORE_ADDR memaddr, char *myaddr, 263 int len, int write, 264 struct target_ops * target)); 265 266 #if 0 267 /* Enable this after 4.12. */ 268 269 /* Search target memory. Start at STARTADDR and take LEN bytes of 270 target memory, and them with MASK, and compare to DATA. If they 271 match, set *ADDR_FOUND to the address we found it at, store the data 272 we found at LEN bytes starting at DATA_FOUND, and return. If 273 not, add INCREMENT to the search address and keep trying until 274 the search address is outside of the range [LORANGE,HIRANGE). 275 276 If we don't find anything, set *ADDR_FOUND to (CORE_ADDR)0 and return. */ 277 void (*to_search) PARAMS ((int len, char *data, char *mask, 278 CORE_ADDR startaddr, int increment, 279 CORE_ADDR lorange, CORE_ADDR hirange, 280 CORE_ADDR *addr_found, char *data_found)); 281 282 #define target_search(len, data, mask, startaddr, increment, lorange, hirange, addr_found, data_found) \ 283 (*current_target.to_search) (len, data, mask, startaddr, increment, \ 284 lorange, hirange, addr_found, data_found) 285 #endif /* 0 */ 286 287 void (*to_files_info) PARAMS ((struct target_ops *)); 288 int (*to_insert_breakpoint) PARAMS ((CORE_ADDR, char *)); 289 int (*to_remove_breakpoint) PARAMS ((CORE_ADDR, char *)); 290 void (*to_terminal_init) PARAMS ((void)); 291 void (*to_terminal_inferior) PARAMS ((void)); 292 void (*to_terminal_ours_for_output) PARAMS ((void)); 293 void (*to_terminal_ours) PARAMS ((void)); 294 void (*to_terminal_info) PARAMS ((char *, int)); 295 void (*to_kill) PARAMS ((void)); 296 void (*to_load) PARAMS ((char *, int)); 297 int (*to_lookup_symbol) PARAMS ((char *, CORE_ADDR *)); 298 void (*to_create_inferior) PARAMS ((char *, char *, char **)); 299 void (*to_mourn_inferior) PARAMS ((void)); 300 int (*to_can_run) PARAMS ((void)); 301 void (*to_notice_signals) PARAMS ((int pid)); 302 int (*to_thread_alive) PARAMS ((int pid)); 303 void (*to_stop) PARAMS ((void)); 304 enum strata to_stratum; 305 struct target_ops 306 *DONT_USE; /* formerly to_next */ 307 int to_has_all_memory; 308 int to_has_memory; 309 int to_has_stack; 310 int to_has_registers; 311 int to_has_execution; 312 struct section_table 313 *to_sections; 314 struct section_table 315 *to_sections_end; 316 int to_magic; 317 /* Need sub-structure for target machine related rather than comm related? */ 318 }; 319 320 /* Magic number for checking ops size. If a struct doesn't end with this 321 number, somebody changed the declaration but didn't change all the 322 places that initialize one. */ 323 324 #define OPS_MAGIC 3840 325 326 /* The ops structure for our "current" target process. This should 327 never be NULL. If there is no target, it points to the dummy_target. */ 328 329 extern struct target_ops current_target; 330 331 /* An item on the target stack. */ 332 333 struct target_stack_item 334 { 335 struct target_stack_item *next; 336 struct target_ops *target_ops; 337 }; 338 339 /* The target stack. */ 340 341 extern struct target_stack_item *target_stack; 342 343 /* Define easy words for doing these operations on our current target. */ 344 345 #define target_shortname (current_target.to_shortname) 346 #define target_longname (current_target.to_longname) 347 348 /* The open routine takes the rest of the parameters from the command, 349 and (if successful) pushes a new target onto the stack. 350 Targets should supply this routine, if only to provide an error message. */ 351 #define target_open(name, from_tty) \ 352 (*current_target.to_open) (name, from_tty) 353 354 /* Does whatever cleanup is required for a target that we are no longer 355 going to be calling. Argument says whether we are quitting gdb and 356 should not get hung in case of errors, or whether we want a clean 357 termination even if it takes a while. This routine is automatically 358 always called just before a routine is popped off the target stack. 359 Closing file descriptors and freeing memory are typical things it should 360 do. */ 361 362 #define target_close(quitting) \ 363 (*current_target.to_close) (quitting) 364 365 /* Attaches to a process on the target side. Arguments are as passed 366 to the `attach' command by the user. This routine can be called 367 when the target is not on the target-stack, if the target_can_run 368 routine returns 1; in that case, it must push itself onto the stack. 369 Upon exit, the target should be ready for normal operations, and 370 should be ready to deliver the status of the process immediately 371 (without waiting) to an upcoming target_wait call. */ 372 373 #define target_attach(args, from_tty) \ 374 (*current_target.to_attach) (args, from_tty) 375 376 /* Takes a program previously attached to and detaches it. 377 The program may resume execution (some targets do, some don't) and will 378 no longer stop on signals, etc. We better not have left any breakpoints 379 in the program or it'll die when it hits one. ARGS is arguments 380 typed by the user (e.g. a signal to send the process). FROM_TTY 381 says whether to be verbose or not. */ 382 383 extern void 384 target_detach PARAMS ((char *, int)); 385 386 /* Resume execution of the target process PID. STEP says whether to 387 single-step or to run free; SIGGNAL is the signal to be given to 388 the target, or TARGET_SIGNAL_0 for no signal. The caller may not 389 pass TARGET_SIGNAL_DEFAULT. */ 390 391 #define target_resume(pid, step, siggnal) \ 392 (*current_target.to_resume) (pid, step, siggnal) 393 394 /* Wait for process pid to do something. Pid = -1 to wait for any pid 395 to do something. Return pid of child, or -1 in case of error; 396 store status through argument pointer STATUS. Note that it is 397 *not* OK to return_to_top_level out of target_wait without popping 398 the debugging target from the stack; GDB isn't prepared to get back 399 to the prompt with a debugging target but without the frame cache, 400 stop_pc, etc., set up. */ 401 402 #define target_wait(pid, status) \ 403 (*current_target.to_wait) (pid, status) 404 405 /* Fetch register REGNO, or all regs if regno == -1. No result. */ 406 407 #define target_fetch_registers(regno) \ 408 (*current_target.to_fetch_registers) (regno) 409 410 /* Store at least register REGNO, or all regs if REGNO == -1. 411 It can store as many registers as it wants to, so target_prepare_to_store 412 must have been previously called. Calls error() if there are problems. */ 413 414 #define target_store_registers(regs) \ 415 (*current_target.to_store_registers) (regs) 416 417 /* Get ready to modify the registers array. On machines which store 418 individual registers, this doesn't need to do anything. On machines 419 which store all the registers in one fell swoop, this makes sure 420 that REGISTERS contains all the registers from the program being 421 debugged. */ 422 423 #define target_prepare_to_store() \ 424 (*current_target.to_prepare_to_store) () 425 426 extern int target_read_string PARAMS ((CORE_ADDR, char **, int, int *)); 427 428 extern int 429 target_read_memory PARAMS ((CORE_ADDR, char *, int)); 430 431 extern int 432 target_read_memory_partial PARAMS ((CORE_ADDR, char *, int, int *)); 433 434 extern int 435 target_write_memory PARAMS ((CORE_ADDR, char *, int)); 436 437 extern int 438 xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *)); 439 440 extern int 441 child_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *)); 442 443 /* Transfer LEN bytes between target address MEMADDR and GDB address MYADDR. 444 Returns 0 for success, errno code for failure (which includes partial 445 transfers--if you want a more useful response to partial transfers, try 446 target_read_memory_partial). */ 447 448 extern int target_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr, 449 int len, int write)); 450 451 /* From exec.c */ 452 453 extern void 454 print_section_info PARAMS ((struct target_ops *, bfd *)); 455 456 /* Print a line about the current target. */ 457 458 #define target_files_info() \ 459 (*current_target.to_files_info) (¤t_target) 460 461 /* Insert a breakpoint at address ADDR in the target machine. 462 SAVE is a pointer to memory allocated for saving the 463 target contents. It is guaranteed by the caller to be long enough 464 to save "sizeof BREAKPOINT" bytes. Result is 0 for success, or 465 an errno value. */ 466 467 #define target_insert_breakpoint(addr, save) \ 468 (*current_target.to_insert_breakpoint) (addr, save) 469 470 /* Remove a breakpoint at address ADDR in the target machine. 471 SAVE is a pointer to the same save area 472 that was previously passed to target_insert_breakpoint. 473 Result is 0 for success, or an errno value. */ 474 475 #define target_remove_breakpoint(addr, save) \ 476 (*current_target.to_remove_breakpoint) (addr, save) 477 478 /* Initialize the terminal settings we record for the inferior, 479 before we actually run the inferior. */ 480 481 #define target_terminal_init() \ 482 (*current_target.to_terminal_init) () 483 484 /* Put the inferior's terminal settings into effect. 485 This is preparation for starting or resuming the inferior. */ 486 487 #define target_terminal_inferior() \ 488 (*current_target.to_terminal_inferior) () 489 490 /* Put some of our terminal settings into effect, 491 enough to get proper results from our output, 492 but do not change into or out of RAW mode 493 so that no input is discarded. 494 495 After doing this, either terminal_ours or terminal_inferior 496 should be called to get back to a normal state of affairs. */ 497 498 #define target_terminal_ours_for_output() \ 499 (*current_target.to_terminal_ours_for_output) () 500 501 /* Put our terminal settings into effect. 502 First record the inferior's terminal settings 503 so they can be restored properly later. */ 504 505 #define target_terminal_ours() \ 506 (*current_target.to_terminal_ours) () 507 508 /* Print useful information about our terminal status, if such a thing 509 exists. */ 510 511 #define target_terminal_info(arg, from_tty) \ 512 (*current_target.to_terminal_info) (arg, from_tty) 513 514 /* Kill the inferior process. Make it go away. */ 515 516 #define target_kill() \ 517 (*current_target.to_kill) () 518 519 /* Load an executable file into the target process. This is expected to 520 not only bring new code into the target process, but also to update 521 GDB's symbol tables to match. */ 522 523 #define target_load(arg, from_tty) \ 524 (*current_target.to_load) (arg, from_tty) 525 526 /* Look up a symbol in the target's symbol table. NAME is the symbol 527 name. ADDRP is a CORE_ADDR * pointing to where the value of the symbol 528 should be returned. The result is 0 if successful, nonzero if the 529 symbol does not exist in the target environment. This function should 530 not call error() if communication with the target is interrupted, since 531 it is called from symbol reading, but should return nonzero, possibly 532 doing a complain(). */ 533 534 #define target_lookup_symbol(name, addrp) \ 535 (*current_target.to_lookup_symbol) (name, addrp) 536 537 /* Start an inferior process and set inferior_pid to its pid. 538 EXEC_FILE is the file to run. 539 ALLARGS is a string containing the arguments to the program. 540 ENV is the environment vector to pass. Errors reported with error(). 541 On VxWorks and various standalone systems, we ignore exec_file. */ 542 543 #define target_create_inferior(exec_file, args, env) \ 544 (*current_target.to_create_inferior) (exec_file, args, env) 545 546 /* The inferior process has died. Do what is right. */ 547 548 #define target_mourn_inferior() \ 549 (*current_target.to_mourn_inferior) () 550 551 /* Does target have enough data to do a run or attach command? */ 552 553 #define target_can_run(t) \ 554 ((t)->to_can_run) () 555 556 /* post process changes to signal handling in the inferior. */ 557 558 #define target_notice_signals(pid) \ 559 (*current_target.to_notice_signals) (pid) 560 561 /* Check to see if a thread is still alive. */ 562 563 #define target_thread_alive(pid) \ 564 (*current_target.to_thread_alive) (pid) 565 566 /* Make target stop in a continuable fashion. (For instance, under Unix, this 567 should act like SIGSTOP). This function is normally used by GUIs to 568 implement a stop button. */ 569 570 #define target_stop() current_target.to_stop () 571 572 /* Pointer to next target in the chain, e.g. a core file and an exec file. */ 573 574 #define target_next \ 575 (current_target.to_next) 576 577 /* Does the target include all of memory, or only part of it? This 578 determines whether we look up the target chain for other parts of 579 memory if this target can't satisfy a request. */ 580 581 #define target_has_all_memory \ 582 (current_target.to_has_all_memory) 583 584 /* Does the target include memory? (Dummy targets don't.) */ 585 586 #define target_has_memory \ 587 (current_target.to_has_memory) 588 589 /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until 590 we start a process.) */ 591 592 #define target_has_stack \ 593 (current_target.to_has_stack) 594 595 /* Does the target have registers? (Exec files don't.) */ 596 597 #define target_has_registers \ 598 (current_target.to_has_registers) 599 600 /* Does the target have execution? Can we make it jump (through 601 hoops), or pop its stack a few times? FIXME: If this is to work that 602 way, it needs to check whether an inferior actually exists. 603 remote-udi.c and probably other targets can be the current target 604 when the inferior doesn't actually exist at the moment. Right now 605 this just tells us whether this target is *capable* of execution. */ 606 607 #define target_has_execution \ 608 (current_target.to_has_execution) 609 610 extern void target_link PARAMS ((char *, CORE_ADDR *)); 611 612 /* Converts a process id to a string. Usually, the string just contains 613 `process xyz', but on some systems it may contain 614 `process xyz thread abc'. */ 615 616 #ifndef target_pid_to_str 617 #define target_pid_to_str(PID) \ 618 normal_pid_to_str (PID) 619 extern char *normal_pid_to_str PARAMS ((int pid)); 620 #endif 621 622 #ifndef target_new_objfile 623 #define target_new_objfile(OBJFILE) 624 #endif 625 626 /* Hook to call target-dependant code after reading in a new symbol table. */ 627 628 #ifndef TARGET_SYMFILE_POSTREAD 629 #define TARGET_SYMFILE_POSTREAD(OBJFILE) 630 #endif 631 632 /* Hook to call target dependant code just after inferior target process has 633 started. */ 634 635 #ifndef TARGET_CREATE_INFERIOR_HOOK 636 #define TARGET_CREATE_INFERIOR_HOOK(PID) 637 #endif 638 639 /* Hardware watchpoint interfaces. */ 640 641 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or 642 write). */ 643 644 #ifndef STOPPED_BY_WATCHPOINT 645 #define STOPPED_BY_WATCHPOINT(w) 0 646 #endif 647 648 /* Provide defaults for systems that don't support hardware watchpoints. */ 649 650 #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS 651 652 /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is 653 one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or 654 bp_hardware_breakpoint. CNT is the number of such watchpoints used so far 655 (including this one?). OTHERTYPE is who knows what... */ 656 657 #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) 0 658 659 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 1 660 for read and 2 for read/write accesses. Returns 0 for success, non-zero for 661 failure. */ 662 663 #define target_remove_watchpoint(ADDR,LEN,TYPE) -1 664 #define target_insert_watchpoint(ADDR,LEN,TYPE) -1 665 666 #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */ 667 668 #ifndef target_insert_hw_breakpoint 669 #define target_remove_hw_breakpoint(ADDR,SHADOW) -1 670 #define target_insert_hw_breakpoint(ADDR,SHADOW) -1 671 #endif 672 673 #ifndef target_stopped_data_address 674 #define target_stopped_data_address() 0 675 #endif 676 677 /* If defined, then we need to decr pc by this much after a hardware break- 678 point. Presumably this overrides DECR_PC_AFTER_BREAK... */ 679 680 #ifndef DECR_PC_AFTER_HW_BREAK 681 #define DECR_PC_AFTER_HW_BREAK 0 682 #endif 683 684 /* Routines for maintenance of the target structures... 685 686 add_target: Add a target to the list of all possible targets. 687 688 push_target: Make this target the top of the stack of currently used 689 targets, within its particular stratum of the stack. Result 690 is 0 if now atop the stack, nonzero if not on top (maybe 691 should warn user). 692 693 unpush_target: Remove this from the stack of currently used targets, 694 no matter where it is on the list. Returns 0 if no 695 change, 1 if removed from stack. 696 697 pop_target: Remove the top thing on the stack of current targets. */ 698 699 extern void 700 add_target PARAMS ((struct target_ops *)); 701 702 extern int 703 push_target PARAMS ((struct target_ops *)); 704 705 extern int 706 unpush_target PARAMS ((struct target_ops *)); 707 708 extern void 709 target_preopen PARAMS ((int)); 710 711 extern void 712 pop_target PARAMS ((void)); 713 714 /* Struct section_table maps address ranges to file sections. It is 715 mostly used with BFD files, but can be used without (e.g. for handling 716 raw disks, or files not in formats handled by BFD). */ 717 718 struct section_table { 719 CORE_ADDR addr; /* Lowest address in section */ 720 CORE_ADDR endaddr; /* 1+highest address in section */ 721 722 sec_ptr the_bfd_section; 723 724 bfd *bfd; /* BFD file pointer */ 725 }; 726 727 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. 728 Returns 0 if OK, 1 on error. */ 729 730 extern int 731 build_section_table PARAMS ((bfd *, struct section_table **, 732 struct section_table **)); 733 734 /* From mem-break.c */ 735 736 extern int 737 memory_remove_breakpoint PARAMS ((CORE_ADDR, char *)); 738 739 extern int 740 memory_insert_breakpoint PARAMS ((CORE_ADDR, char *)); 741 742 /* From target.c */ 743 744 extern void 745 initialize_targets PARAMS ((void)); 746 747 extern void 748 noprocess PARAMS ((void)); 749 750 extern void 751 find_default_attach PARAMS ((char *, int)); 752 753 extern void 754 find_default_create_inferior PARAMS ((char *, char *, char **)); 755 756 extern struct target_ops * 757 find_core_target PARAMS ((void)); 758 759 /* Stuff that should be shared among the various remote targets. */ 760 761 /* Debugging level. 0 is off, and non-zero values mean to print some debug 762 information (higher values, more information). */ 763 extern int remote_debug; 764 765 /* Speed in bits per second, or -1 which means don't mess with the speed. */ 766 extern int baud_rate; 767 /* Timeout limit for response from target. */ 768 extern int remote_timeout; 769 770 /* Functions for helping to write a native target. */ 771 772 /* This is for native targets which use a unix/POSIX-style waitstatus. */ 773 extern void store_waitstatus PARAMS ((struct target_waitstatus *, int)); 774 775 /* Convert between host signal numbers and enum target_signal's. */ 776 extern enum target_signal target_signal_from_host PARAMS ((int)); 777 extern int target_signal_to_host PARAMS ((enum target_signal)); 778 779 /* Convert from a number used in a GDB command to an enum target_signal. */ 780 extern enum target_signal target_signal_from_command PARAMS ((int)); 781 782 783 /* Imported from machine dependent code */ 784 785 #ifdef NO_SINGLE_STEP 786 extern int one_stepped; 787 extern void single_step PARAMS ((enum target_signal)); 788 #endif /* NO_SINGLE_STEP */ 789 790 #endif /* !defined (TARGET_H) */ 791