| 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 | #if defined(MACH) || defined(__MACH__) |
| 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 | #endif |
| 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 | \f |
| 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 | \f |
| 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 memaddr, char *myaddr, int len)); |
| 430 | |
| 431 | extern int |
| 432 | target_read_memory_section PARAMS ((CORE_ADDR memaddr, char *myaddr, int len, |
| 433 | asection *bfd_section)); |
| 434 | |
| 435 | extern int |
| 436 | target_read_memory_partial PARAMS ((CORE_ADDR, char *, int, int *)); |
| 437 | |
| 438 | extern int |
| 439 | target_write_memory PARAMS ((CORE_ADDR, char *, int)); |
| 440 | |
| 441 | extern int |
| 442 | xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *)); |
| 443 | |
| 444 | extern int |
| 445 | child_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *)); |
| 446 | |
| 447 | /* From exec.c */ |
| 448 | |
| 449 | extern void |
| 450 | print_section_info PARAMS ((struct target_ops *, bfd *)); |
| 451 | |
| 452 | /* Print a line about the current target. */ |
| 453 | |
| 454 | #define target_files_info() \ |
| 455 | (*current_target.to_files_info) (¤t_target) |
| 456 | |
| 457 | /* Insert a breakpoint at address ADDR in the target machine. |
| 458 | SAVE is a pointer to memory allocated for saving the |
| 459 | target contents. It is guaranteed by the caller to be long enough |
| 460 | to save "sizeof BREAKPOINT" bytes. Result is 0 for success, or |
| 461 | an errno value. */ |
| 462 | |
| 463 | #define target_insert_breakpoint(addr, save) \ |
| 464 | (*current_target.to_insert_breakpoint) (addr, save) |
| 465 | |
| 466 | /* Remove a breakpoint at address ADDR in the target machine. |
| 467 | SAVE is a pointer to the same save area |
| 468 | that was previously passed to target_insert_breakpoint. |
| 469 | Result is 0 for success, or an errno value. */ |
| 470 | |
| 471 | #define target_remove_breakpoint(addr, save) \ |
| 472 | (*current_target.to_remove_breakpoint) (addr, save) |
| 473 | |
| 474 | /* Initialize the terminal settings we record for the inferior, |
| 475 | before we actually run the inferior. */ |
| 476 | |
| 477 | #define target_terminal_init() \ |
| 478 | (*current_target.to_terminal_init) () |
| 479 | |
| 480 | /* Put the inferior's terminal settings into effect. |
| 481 | This is preparation for starting or resuming the inferior. */ |
| 482 | |
| 483 | #define target_terminal_inferior() \ |
| 484 | (*current_target.to_terminal_inferior) () |
| 485 | |
| 486 | /* Put some of our terminal settings into effect, |
| 487 | enough to get proper results from our output, |
| 488 | but do not change into or out of RAW mode |
| 489 | so that no input is discarded. |
| 490 | |
| 491 | After doing this, either terminal_ours or terminal_inferior |
| 492 | should be called to get back to a normal state of affairs. */ |
| 493 | |
| 494 | #define target_terminal_ours_for_output() \ |
| 495 | (*current_target.to_terminal_ours_for_output) () |
| 496 | |
| 497 | /* Put our terminal settings into effect. |
| 498 | First record the inferior's terminal settings |
| 499 | so they can be restored properly later. */ |
| 500 | |
| 501 | #define target_terminal_ours() \ |
| 502 | (*current_target.to_terminal_ours) () |
| 503 | |
| 504 | /* Print useful information about our terminal status, if such a thing |
| 505 | exists. */ |
| 506 | |
| 507 | #define target_terminal_info(arg, from_tty) \ |
| 508 | (*current_target.to_terminal_info) (arg, from_tty) |
| 509 | |
| 510 | /* Kill the inferior process. Make it go away. */ |
| 511 | |
| 512 | #define target_kill() \ |
| 513 | (*current_target.to_kill) () |
| 514 | |
| 515 | /* Load an executable file into the target process. This is expected to |
| 516 | not only bring new code into the target process, but also to update |
| 517 | GDB's symbol tables to match. */ |
| 518 | |
| 519 | #define target_load(arg, from_tty) \ |
| 520 | (*current_target.to_load) (arg, from_tty) |
| 521 | |
| 522 | /* Look up a symbol in the target's symbol table. NAME is the symbol |
| 523 | name. ADDRP is a CORE_ADDR * pointing to where the value of the symbol |
| 524 | should be returned. The result is 0 if successful, nonzero if the |
| 525 | symbol does not exist in the target environment. This function should |
| 526 | not call error() if communication with the target is interrupted, since |
| 527 | it is called from symbol reading, but should return nonzero, possibly |
| 528 | doing a complain(). */ |
| 529 | |
| 530 | #define target_lookup_symbol(name, addrp) \ |
| 531 | (*current_target.to_lookup_symbol) (name, addrp) |
| 532 | |
| 533 | /* Start an inferior process and set inferior_pid to its pid. |
| 534 | EXEC_FILE is the file to run. |
| 535 | ALLARGS is a string containing the arguments to the program. |
| 536 | ENV is the environment vector to pass. Errors reported with error(). |
| 537 | On VxWorks and various standalone systems, we ignore exec_file. */ |
| 538 | |
| 539 | #define target_create_inferior(exec_file, args, env) \ |
| 540 | (*current_target.to_create_inferior) (exec_file, args, env) |
| 541 | |
| 542 | /* The inferior process has died. Do what is right. */ |
| 543 | |
| 544 | #define target_mourn_inferior() \ |
| 545 | (*current_target.to_mourn_inferior) () |
| 546 | |
| 547 | /* Does target have enough data to do a run or attach command? */ |
| 548 | |
| 549 | #define target_can_run(t) \ |
| 550 | ((t)->to_can_run) () |
| 551 | |
| 552 | /* post process changes to signal handling in the inferior. */ |
| 553 | |
| 554 | #define target_notice_signals(pid) \ |
| 555 | (*current_target.to_notice_signals) (pid) |
| 556 | |
| 557 | /* Check to see if a thread is still alive. */ |
| 558 | |
| 559 | #define target_thread_alive(pid) \ |
| 560 | (*current_target.to_thread_alive) (pid) |
| 561 | |
| 562 | /* Make target stop in a continuable fashion. (For instance, under Unix, this |
| 563 | should act like SIGSTOP). This function is normally used by GUIs to |
| 564 | implement a stop button. */ |
| 565 | |
| 566 | #define target_stop current_target.to_stop |
| 567 | |
| 568 | /* Pointer to next target in the chain, e.g. a core file and an exec file. */ |
| 569 | |
| 570 | #define target_next \ |
| 571 | (current_target.to_next) |
| 572 | |
| 573 | /* Does the target include all of memory, or only part of it? This |
| 574 | determines whether we look up the target chain for other parts of |
| 575 | memory if this target can't satisfy a request. */ |
| 576 | |
| 577 | #define target_has_all_memory \ |
| 578 | (current_target.to_has_all_memory) |
| 579 | |
| 580 | /* Does the target include memory? (Dummy targets don't.) */ |
| 581 | |
| 582 | #define target_has_memory \ |
| 583 | (current_target.to_has_memory) |
| 584 | |
| 585 | /* Does the target have a stack? (Exec files don't, VxWorks doesn't, until |
| 586 | we start a process.) */ |
| 587 | |
| 588 | #define target_has_stack \ |
| 589 | (current_target.to_has_stack) |
| 590 | |
| 591 | /* Does the target have registers? (Exec files don't.) */ |
| 592 | |
| 593 | #define target_has_registers \ |
| 594 | (current_target.to_has_registers) |
| 595 | |
| 596 | /* Does the target have execution? Can we make it jump (through |
| 597 | hoops), or pop its stack a few times? FIXME: If this is to work that |
| 598 | way, it needs to check whether an inferior actually exists. |
| 599 | remote-udi.c and probably other targets can be the current target |
| 600 | when the inferior doesn't actually exist at the moment. Right now |
| 601 | this just tells us whether this target is *capable* of execution. */ |
| 602 | |
| 603 | #define target_has_execution \ |
| 604 | (current_target.to_has_execution) |
| 605 | |
| 606 | extern void target_link PARAMS ((char *, CORE_ADDR *)); |
| 607 | |
| 608 | /* Converts a process id to a string. Usually, the string just contains |
| 609 | `process xyz', but on some systems it may contain |
| 610 | `process xyz thread abc'. */ |
| 611 | |
| 612 | #ifndef target_pid_to_str |
| 613 | #define target_pid_to_str(PID) \ |
| 614 | normal_pid_to_str (PID) |
| 615 | extern char *normal_pid_to_str PARAMS ((int pid)); |
| 616 | #endif |
| 617 | |
| 618 | #ifndef target_new_objfile |
| 619 | #define target_new_objfile(OBJFILE) |
| 620 | #endif |
| 621 | |
| 622 | /* Hook to call target-dependant code after reading in a new symbol table. */ |
| 623 | |
| 624 | #ifndef TARGET_SYMFILE_POSTREAD |
| 625 | #define TARGET_SYMFILE_POSTREAD(OBJFILE) |
| 626 | #endif |
| 627 | |
| 628 | /* Hook to call target dependant code just after inferior target process has |
| 629 | started. */ |
| 630 | |
| 631 | #ifndef TARGET_CREATE_INFERIOR_HOOK |
| 632 | #define TARGET_CREATE_INFERIOR_HOOK(PID) |
| 633 | #endif |
| 634 | |
| 635 | /* Hardware watchpoint interfaces. */ |
| 636 | |
| 637 | /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or |
| 638 | write). */ |
| 639 | |
| 640 | #ifndef STOPPED_BY_WATCHPOINT |
| 641 | #define STOPPED_BY_WATCHPOINT(w) 0 |
| 642 | #endif |
| 643 | |
| 644 | /* Provide defaults for systems that don't support hardware watchpoints. */ |
| 645 | |
| 646 | #ifndef TARGET_HAS_HARDWARE_WATCHPOINTS |
| 647 | |
| 648 | /* Returns non-zero if we can set a hardware watchpoint of type TYPE. TYPE is |
| 649 | one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or |
| 650 | bp_hardware_breakpoint. CNT is the number of such watchpoints used so far |
| 651 | (including this one?). OTHERTYPE is who knows what... */ |
| 652 | |
| 653 | #define TARGET_CAN_USE_HARDWARE_WATCHPOINT(TYPE,CNT,OTHERTYPE) 0 |
| 654 | |
| 655 | /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes. TYPE is 0 |
| 656 | for write, 1 for read, and 2 for read/write accesses. Returns 0 for |
| 657 | success, non-zero for failure. */ |
| 658 | |
| 659 | #define target_remove_watchpoint(ADDR,LEN,TYPE) -1 |
| 660 | #define target_insert_watchpoint(ADDR,LEN,TYPE) -1 |
| 661 | |
| 662 | #endif /* TARGET_HAS_HARDWARE_WATCHPOINTS */ |
| 663 | |
| 664 | #ifndef target_insert_hw_breakpoint |
| 665 | #define target_remove_hw_breakpoint(ADDR,SHADOW) -1 |
| 666 | #define target_insert_hw_breakpoint(ADDR,SHADOW) -1 |
| 667 | #endif |
| 668 | |
| 669 | #ifndef target_stopped_data_address |
| 670 | #define target_stopped_data_address() 0 |
| 671 | #endif |
| 672 | |
| 673 | /* If defined, then we need to decr pc by this much after a hardware break- |
| 674 | point. Presumably this overrides DECR_PC_AFTER_BREAK... */ |
| 675 | |
| 676 | #ifndef DECR_PC_AFTER_HW_BREAK |
| 677 | #define DECR_PC_AFTER_HW_BREAK 0 |
| 678 | #endif |
| 679 | |
| 680 | /* Routines for maintenance of the target structures... |
| 681 | |
| 682 | add_target: Add a target to the list of all possible targets. |
| 683 | |
| 684 | push_target: Make this target the top of the stack of currently used |
| 685 | targets, within its particular stratum of the stack. Result |
| 686 | is 0 if now atop the stack, nonzero if not on top (maybe |
| 687 | should warn user). |
| 688 | |
| 689 | unpush_target: Remove this from the stack of currently used targets, |
| 690 | no matter where it is on the list. Returns 0 if no |
| 691 | change, 1 if removed from stack. |
| 692 | |
| 693 | pop_target: Remove the top thing on the stack of current targets. */ |
| 694 | |
| 695 | extern void |
| 696 | add_target PARAMS ((struct target_ops *)); |
| 697 | |
| 698 | extern int |
| 699 | push_target PARAMS ((struct target_ops *)); |
| 700 | |
| 701 | extern int |
| 702 | unpush_target PARAMS ((struct target_ops *)); |
| 703 | |
| 704 | extern void |
| 705 | target_preopen PARAMS ((int)); |
| 706 | |
| 707 | extern void |
| 708 | pop_target PARAMS ((void)); |
| 709 | |
| 710 | /* Struct section_table maps address ranges to file sections. It is |
| 711 | mostly used with BFD files, but can be used without (e.g. for handling |
| 712 | raw disks, or files not in formats handled by BFD). */ |
| 713 | |
| 714 | struct section_table { |
| 715 | CORE_ADDR addr; /* Lowest address in section */ |
| 716 | CORE_ADDR endaddr; /* 1+highest address in section */ |
| 717 | |
| 718 | sec_ptr the_bfd_section; |
| 719 | |
| 720 | bfd *bfd; /* BFD file pointer */ |
| 721 | }; |
| 722 | |
| 723 | /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR. |
| 724 | Returns 0 if OK, 1 on error. */ |
| 725 | |
| 726 | extern int |
| 727 | build_section_table PARAMS ((bfd *, struct section_table **, |
| 728 | struct section_table **)); |
| 729 | |
| 730 | /* From mem-break.c */ |
| 731 | |
| 732 | extern int |
| 733 | memory_remove_breakpoint PARAMS ((CORE_ADDR, char *)); |
| 734 | |
| 735 | extern int |
| 736 | memory_insert_breakpoint PARAMS ((CORE_ADDR, char *)); |
| 737 | |
| 738 | unsigned char * |
| 739 | memory_breakpoint_from_pc PARAMS ((CORE_ADDR *pcptr, int *lenptr)); |
| 740 | |
| 741 | /* From target.c */ |
| 742 | |
| 743 | extern void |
| 744 | initialize_targets PARAMS ((void)); |
| 745 | |
| 746 | extern void |
| 747 | noprocess PARAMS ((void)); |
| 748 | |
| 749 | extern void |
| 750 | find_default_attach PARAMS ((char *, int)); |
| 751 | |
| 752 | extern void |
| 753 | find_default_create_inferior PARAMS ((char *, char *, char **)); |
| 754 | |
| 755 | extern struct target_ops * |
| 756 | find_core_target PARAMS ((void)); |
| 757 | \f |
| 758 | /* Stuff that should be shared among the various remote targets. */ |
| 759 | |
| 760 | /* Debugging level. 0 is off, and non-zero values mean to print some debug |
| 761 | information (higher values, more information). */ |
| 762 | extern int remote_debug; |
| 763 | |
| 764 | /* Speed in bits per second, or -1 which means don't mess with the speed. */ |
| 765 | extern int baud_rate; |
| 766 | /* Timeout limit for response from target. */ |
| 767 | extern int remote_timeout; |
| 768 | |
| 769 | extern asection *target_memory_bfd_section; |
| 770 | \f |
| 771 | /* Functions for helping to write a native target. */ |
| 772 | |
| 773 | /* This is for native targets which use a unix/POSIX-style waitstatus. */ |
| 774 | extern void store_waitstatus PARAMS ((struct target_waitstatus *, int)); |
| 775 | |
| 776 | /* Convert between host signal numbers and enum target_signal's. */ |
| 777 | extern enum target_signal target_signal_from_host PARAMS ((int)); |
| 778 | extern int target_signal_to_host PARAMS ((enum target_signal)); |
| 779 | |
| 780 | /* Convert from a number used in a GDB command to an enum target_signal. */ |
| 781 | extern enum target_signal target_signal_from_command PARAMS ((int)); |
| 782 | |
| 783 | /* Any target can call this to switch to remote protocol (in remote.c). */ |
| 784 | extern void push_remote_target PARAMS ((char *name, int from_tty)); |
| 785 | |
| 786 | /* Any target cah call this to open using the remote protocol */ |
| 787 | extern void open_remote_target PARAMS ((char *name, int from_tty, struct target_ops *target, int extended_p)); |
| 788 | |
| 789 | \f |
| 790 | /* Imported from machine dependent code */ |
| 791 | |
| 792 | #ifdef NO_SINGLE_STEP |
| 793 | extern int one_stepped; |
| 794 | extern void single_step PARAMS ((enum target_signal)); |
| 795 | #endif /* NO_SINGLE_STEP */ |
| 796 | |
| 797 | #endif /* !defined (TARGET_H) */ |