gdb/target.h

   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., 675 Mass Ave, Cambridge, MA 02139, 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         process_stratum         /* Executing processes */
  50 };
  51
  52 /* Stuff for target_wait.  */
  53
  54 /* Generally, what has the program done?  */
  55 enum target_waitkind {
  56   /* The program has exited.  The exit status is in value.integer.  */
  57   TARGET_WAITKIND_EXITED,
  58
  59   /* The program has stopped with a signal.  Which signal is in value.sig.  */
  60   TARGET_WAITKIND_STOPPED,
  61
  62   /* The program has terminated with a signal.  Which signal is in
  63      value.sig.  */
  64   TARGET_WAITKIND_SIGNALLED,
  65
  66   /* The program is letting us know that it dynamically loaded something
  67      (e.g. it called load(2) on AIX).  */
  68   TARGET_WAITKIND_LOADED,
  69
  70   /* Nothing happened, but we stopped anyway.  This perhaps should be handled
  71      within target_wait, but I'm not sure target_wait should be resuming the
  72      inferior.  */
  73   TARGET_WAITKIND_SPURIOUS
  74   };
  75
  76 /* The numbering of these signals is chosen to match traditional unix
  77    signals (insofar as various unices use the same numbers, anyway).
  78    It is also the numbering of the GDB remote protocol.  Other remote
  79    protocols, if they use a different numbering, should make sure to
  80    translate appropriately.  */
  81
  82 /* This is based strongly on Unix/POSIX signals for several reasons:
  83    (1) This set of signals represents a widely-accepted attempt to
  84    represent events of this sort in a portable fashion, (2) we want a
  85    signal to make it from wait to child_wait to the user intact, (3) many
  86    remote protocols use a similar encoding.  However, it is
  87    recognized that this set of signals has limitations (such as not
  88    distinguishing between various kinds of SIGSEGV, or not
  89    distinguishing hitting a breakpoint from finishing a single step).
  90    So in the future we may get around this either by adding additional
  91    signals for breakpoint, single-step, etc., or by adding signal
  92    codes; the latter seems more in the spirit of what BSD, System V,
  93    etc. are doing to address these issues.  */
  94
  95 /* For an explanation of what each signal means, see
  96    target_signal_to_string.  */
  97
  98 enum target_signal {
  99   /* Used some places (e.g. stop_signal) to record the concept that
 100      there is no signal.  */
 101   TARGET_SIGNAL_0 = 0,
 102   TARGET_SIGNAL_FIRST = 0,
 103   TARGET_SIGNAL_HUP = 1,
 104   TARGET_SIGNAL_INT = 2,
 105   TARGET_SIGNAL_QUIT = 3,
 106   TARGET_SIGNAL_ILL = 4,
 107   TARGET_SIGNAL_TRAP = 5,
 108   TARGET_SIGNAL_ABRT = 6,
 109   TARGET_SIGNAL_EMT = 7,
 110   TARGET_SIGNAL_FPE = 8,
 111   TARGET_SIGNAL_KILL = 9,
 112   TARGET_SIGNAL_BUS = 10,
 113   TARGET_SIGNAL_SEGV = 11,
 114   TARGET_SIGNAL_SYS = 12,
 115   TARGET_SIGNAL_PIPE = 13,
 116   TARGET_SIGNAL_ALRM = 14,
 117   TARGET_SIGNAL_TERM = 15,
 118   TARGET_SIGNAL_URG = 16,
 119   TARGET_SIGNAL_STOP = 17,
 120   TARGET_SIGNAL_TSTP = 18,
 121   TARGET_SIGNAL_CONT = 19,
 122   TARGET_SIGNAL_CHLD = 20,
 123   TARGET_SIGNAL_TTIN = 21,
 124   TARGET_SIGNAL_TTOU = 22,
 125   TARGET_SIGNAL_IO = 23,
 126   TARGET_SIGNAL_XCPU = 24,
 127   TARGET_SIGNAL_XFSZ = 25,
 128   TARGET_SIGNAL_VTALRM = 26,
 129   TARGET_SIGNAL_PROF = 27,
 130   TARGET_SIGNAL_WINCH = 28,
 131   TARGET_SIGNAL_LOST = 29,
 132   TARGET_SIGNAL_USR1 = 30,
 133   TARGET_SIGNAL_USR2 = 31,
 134   TARGET_SIGNAL_PWR = 32,
 135   /* Similar to SIGIO.  Perhaps they should have the same number.  */
 136   TARGET_SIGNAL_POLL = 33,
 137   TARGET_SIGNAL_WIND = 34,
 138   TARGET_SIGNAL_PHONE = 35,
 139   TARGET_SIGNAL_WAITING = 36,
 140   TARGET_SIGNAL_LWP = 37,
 141   TARGET_SIGNAL_DANGER = 38,
 142   TARGET_SIGNAL_GRANT = 39,
 143   TARGET_SIGNAL_RETRACT = 40,
 144   TARGET_SIGNAL_MSG = 41,
 145   TARGET_SIGNAL_SOUND = 42,
 146   TARGET_SIGNAL_SAK = 43,
 147
 148   /* Some signal we don't know about.  */
 149   TARGET_SIGNAL_UNKNOWN,
 150
 151   /* Use whatever signal we use when one is not specifically specified
 152      (for passing to proceed and so on).  */
 153   TARGET_SIGNAL_DEFAULT,
 154
 155   /* Last and unused enum value, for sizing arrays, etc.  */
 156   TARGET_SIGNAL_LAST
 157 };
 158
 159 struct target_waitstatus {
 160   enum target_waitkind kind;
 161
 162   /* Exit status or signal number.  */
 163   union {
 164     int integer;
 165     enum target_signal sig;
 166   } value;
 167 };
 168
 169 /* Return the string for a signal.  */
 170 extern char *target_signal_to_string PARAMS ((enum target_signal));
 171
 172 /* Return the name (SIGHUP, etc.) for a signal.  */
 173 extern char *target_signal_to_name PARAMS ((enum target_signal));
 174
 175 /* Given a name (SIGHUP, etc.), return its signal.  */
 176 enum target_signal target_signal_from_name PARAMS ((char *));
 177 \f
 178 struct target_ops
 179 {
 180   char         *to_shortname;   /* Name this target type */
 181   char         *to_longname;    /* Name for printing */
 182   char         *to_doc;         /* Documentation.  Does not include trailing
 183                                    newline, and starts with a one-line descrip-
 184                                    tion (probably similar to to_longname). */
 185   void        (*to_open) PARAMS ((char *, int));
 186   void        (*to_close) PARAMS ((int));
 187   void        (*to_attach) PARAMS ((char *, int));
 188   void        (*to_detach) PARAMS ((char *, int));
 189   void        (*to_resume) PARAMS ((int, int, enum target_signal));
 190   int         (*to_wait) PARAMS ((int, struct target_waitstatus *));
 191   void        (*to_fetch_registers) PARAMS ((int));
 192   void        (*to_store_registers) PARAMS ((int));
 193   void        (*to_prepare_to_store) PARAMS ((void));
 194
 195   /* Transfer LEN bytes of memory between GDB address MYADDR and
 196      target address MEMADDR.  If WRITE, transfer them to the target, else
 197      transfer them from the target.  TARGET is the target from which we
 198      get this function.
 199
 200      Return value, N, is one of the following:
 201
 202      0 means that we can't handle this.  If errno has been set, it is the
 203      error which prevented us from doing it (FIXME: What about bfd_error?).
 204
 205      positive (call it N) means that we have transferred N bytes
 206      starting at MEMADDR.  We might be able to handle more bytes
 207      beyond this length, but no promises.
 208
 209      negative (call its absolute value N) means that we cannot
 210      transfer right at MEMADDR, but we could transfer at least
 211      something at MEMADDR + N.  */
 212
 213   int         (*to_xfer_memory) PARAMS ((CORE_ADDR memaddr, char *myaddr,
 214                                          int len, int write,
 215                                          struct target_ops * target));
 216
 217 #if 0
 218   /* Enable this after 4.12.  */
 219
 220   /* Search target memory.  Start at STARTADDR and take LEN bytes of
 221      target memory, and them with MASK, and compare to DATA.  If they
 222      match, set *ADDR_FOUND to the address we found it at, store the data
 223      we found at LEN bytes starting at DATA_FOUND, and return.  If
 224      not, add INCREMENT to the search address and keep trying until
 225      the search address is outside of the range [LORANGE,HIRANGE).
 226
 227      If we don't find anything, set *ADDR_FOUND to (CORE_ADDR)0 and return.  */
 228   void (*to_search) PARAMS ((int len, char *data, char *mask,
 229                              CORE_ADDR startaddr, int increment,
 230                              CORE_ADDR lorange, CORE_ADDR hirange,
 231                              CORE_ADDR *addr_found, char *data_found));
 232
 233 #define target_search(len, data, mask, startaddr, increment, lorange, hirange, addr_found, data_found)  \
 234   (*current_target->to_search) (len, data, mask, startaddr, increment, \
 235                                 lorange, hirange, addr_found, data_found)
 236 #endif /* 0 */
 237
 238   void        (*to_files_info) PARAMS ((struct target_ops *));
 239   int         (*to_insert_breakpoint) PARAMS ((CORE_ADDR, char *));
 240   int         (*to_remove_breakpoint) PARAMS ((CORE_ADDR, char *));
 241   void        (*to_terminal_init) PARAMS ((void));
 242   void        (*to_terminal_inferior) PARAMS ((void));
 243   void        (*to_terminal_ours_for_output) PARAMS ((void));
 244   void        (*to_terminal_ours) PARAMS ((void));
 245   void        (*to_terminal_info) PARAMS ((char *, int));
 246   void        (*to_kill) PARAMS ((void));
 247   void        (*to_load) PARAMS ((char *, int));
 248   int         (*to_lookup_symbol) PARAMS ((char *, CORE_ADDR *));
 249   void        (*to_create_inferior) PARAMS ((char *, char *, char **));
 250   void        (*to_mourn_inferior) PARAMS ((void));
 251   int         (*to_can_run) PARAMS ((void));
 252   void        (*to_notice_signals) PARAMS ((int pid));
 253   enum strata   to_stratum;
 254   struct target_ops
 255                *to_next;
 256   int           to_has_all_memory;
 257   int           to_has_memory;
 258   int           to_has_stack;
 259   int           to_has_registers;
 260   int           to_has_execution;
 261   struct section_table
 262                *to_sections;
 263   struct section_table
 264                *to_sections_end;
 265   int           to_magic;
 266   /* Need sub-structure for target machine related rather than comm related? */
 267 };
 268
 269 /* Magic number for checking ops size.  If a struct doesn't end with this
 270    number, somebody changed the declaration but didn't change all the
 271    places that initialize one.  */
 272
 273 #define OPS_MAGIC       3840
 274
 275 /* The ops structure for our "current" target process.  This should
 276    never be NULL.  If there is no target, it points to the dummy_target.  */
 277
 278 extern struct target_ops        *current_target;
 279
 280 /* Define easy words for doing these operations on our current target.  */
 281
 282 #define target_shortname        (current_target->to_shortname)
 283 #define target_longname         (current_target->to_longname)
 284
 285 /* The open routine takes the rest of the parameters from the command,
 286    and (if successful) pushes a new target onto the stack.
 287    Targets should supply this routine, if only to provide an error message.  */
 288 #define target_open(name, from_tty)     \
 289         (*current_target->to_open) (name, from_tty)
 290
 291 /* Does whatever cleanup is required for a target that we are no longer
 292    going to be calling.  Argument says whether we are quitting gdb and
 293    should not get hung in case of errors, or whether we want a clean
 294    termination even if it takes a while.  This routine is automatically
 295    always called just before a routine is popped off the target stack.
 296    Closing file descriptors and freeing memory are typical things it should
 297    do.  */
 298
 299 #define target_close(quitting)  \
 300         (*current_target->to_close) (quitting)
 301
 302 /* Attaches to a process on the target side.  Arguments are as passed
 303    to the `attach' command by the user.  This routine can be called
 304    when the target is not on the target-stack, if the target_can_run
 305    routine returns 1; in that case, it must push itself onto the stack.
 306    Upon exit, the target should be ready for normal operations, and
 307    should be ready to deliver the status of the process immediately
 308    (without waiting) to an upcoming target_wait call.  */
 309
 310 #define target_attach(args, from_tty)   \
 311         (*current_target->to_attach) (args, from_tty)
 312
 313 /* Takes a program previously attached to and detaches it.
 314    The program may resume execution (some targets do, some don't) and will
 315    no longer stop on signals, etc.  We better not have left any breakpoints
 316    in the program or it'll die when it hits one.  ARGS is arguments
 317    typed by the user (e.g. a signal to send the process).  FROM_TTY
 318    says whether to be verbose or not.  */
 319
 320 extern void
 321 target_detach PARAMS ((char *, int));
 322
 323 /* Resume execution of the target process PID.  STEP says whether to
 324    single-step or to run free; SIGGNAL is the signal to be given to
 325    the target, or TARGET_SIGNAL_0 for no signal.  The caller may not
 326    pass TARGET_SIGNAL_DEFAULT.  */
 327
 328 #define target_resume(pid, step, siggnal)       \
 329         (*current_target->to_resume) (pid, step, siggnal)
 330
 331 /* Wait for process pid to do something.  Pid = -1 to wait for any pid
 332    to do something.  Return pid of child, or -1 in case of error;
 333    store status through argument pointer STATUS.  Note that it is
 334    *not* OK to return_to_top_level out of target_wait without popping
 335    the debugging target from the stack; GDB isn't prepared to get back
 336    to the prompt with a debugging target but without the frame cache,
 337    stop_pc, etc., set up.  */
 338
 339 #define target_wait(pid, status)                \
 340         (*current_target->to_wait) (pid, status)
 341
 342 /* Fetch register REGNO, or all regs if regno == -1.  No result.  */
 343
 344 #define target_fetch_registers(regno)   \
 345         (*current_target->to_fetch_registers) (regno)
 346
 347 /* Store at least register REGNO, or all regs if REGNO == -1.
 348    It can store as many registers as it wants to, so target_prepare_to_store
 349    must have been previously called.  Calls error() if there are problems.  */
 350
 351 #define target_store_registers(regs)    \
 352         (*current_target->to_store_registers) (regs)
 353
 354 /* Get ready to modify the registers array.  On machines which store
 355    individual registers, this doesn't need to do anything.  On machines
 356    which store all the registers in one fell swoop, this makes sure
 357    that REGISTERS contains all the registers from the program being
 358    debugged.  */
 359
 360 #define target_prepare_to_store()       \
 361         (*current_target->to_prepare_to_store) ()
 362
 363 extern int target_read_string PARAMS ((CORE_ADDR, char **, int, int *));
 364
 365 extern int
 366 target_read_memory PARAMS ((CORE_ADDR, char *, int));
 367
 368 extern int
 369 target_read_memory_partial PARAMS ((CORE_ADDR, char *, int, int *));
 370
 371 extern int
 372 target_write_memory PARAMS ((CORE_ADDR, char *, int));
 373
 374 extern int
 375 xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
 376
 377 extern int
 378 child_xfer_memory PARAMS ((CORE_ADDR, char *, int, int, struct target_ops *));
 379
 380 /* Transfer LEN bytes between target address MEMADDR and GDB address MYADDR.
 381    Returns 0 for success, errno code for failure (which includes partial
 382    transfers--if you want a more useful response to partial transfers, try
 383    target_read_memory_partial).  */
 384
 385 extern int target_xfer_memory PARAMS ((CORE_ADDR memaddr, char *myaddr,
 386                                        int len, int write));
 387
 388 /* From exec.c */
 389
 390 extern void
 391 print_section_info PARAMS ((struct target_ops *, bfd *));
 392
 393 /* Print a line about the current target.  */
 394
 395 #define target_files_info()     \
 396         (*current_target->to_files_info) (current_target)
 397
 398 /* Insert a breakpoint at address ADDR in the target machine.
 399    SAVE is a pointer to memory allocated for saving the
 400    target contents.  It is guaranteed by the caller to be long enough
 401    to save "sizeof BREAKPOINT" bytes.  Result is 0 for success, or
 402    an errno value.  */
 403
 404 #define target_insert_breakpoint(addr, save)    \
 405         (*current_target->to_insert_breakpoint) (addr, save)
 406
 407 /* Remove a breakpoint at address ADDR in the target machine.
 408    SAVE is a pointer to the same save area
 409    that was previously passed to target_insert_breakpoint.
 410    Result is 0 for success, or an errno value.  */
 411
 412 #define target_remove_breakpoint(addr, save)    \
 413         (*current_target->to_remove_breakpoint) (addr, save)
 414
 415 /* Initialize the terminal settings we record for the inferior,
 416    before we actually run the inferior.  */
 417
 418 #define target_terminal_init() \
 419         (*current_target->to_terminal_init) ()
 420
 421 /* Put the inferior's terminal settings into effect.
 422    This is preparation for starting or resuming the inferior.  */
 423
 424 #define target_terminal_inferior() \
 425         (*current_target->to_terminal_inferior) ()
 426
 427 /* Put some of our terminal settings into effect,
 428    enough to get proper results from our output,
 429    but do not change into or out of RAW mode
 430    so that no input is discarded.
 431
 432    After doing this, either terminal_ours or terminal_inferior
 433    should be called to get back to a normal state of affairs.  */
 434
 435 #define target_terminal_ours_for_output() \
 436         (*current_target->to_terminal_ours_for_output) ()
 437
 438 /* Put our terminal settings into effect.
 439    First record the inferior's terminal settings
 440    so they can be restored properly later.  */
 441
 442 #define target_terminal_ours() \
 443         (*current_target->to_terminal_ours) ()
 444
 445 /* Print useful information about our terminal status, if such a thing
 446    exists.  */
 447
 448 #define target_terminal_info(arg, from_tty) \
 449         (*current_target->to_terminal_info) (arg, from_tty)
 450
 451 /* Kill the inferior process.   Make it go away.  */
 452
 453 #define target_kill() \
 454         (*current_target->to_kill) ()
 455
 456 /* Load an executable file into the target process.  This is expected to
 457    not only bring new code into the target process, but also to update
 458    GDB's symbol tables to match.  */
 459
 460 #define target_load(arg, from_tty) \
 461         (*current_target->to_load) (arg, from_tty)
 462
 463 /* Look up a symbol in the target's symbol table.  NAME is the symbol
 464    name.  ADDRP is a CORE_ADDR * pointing to where the value of the symbol
 465    should be returned.  The result is 0 if successful, nonzero if the
 466    symbol does not exist in the target environment.  This function should
 467    not call error() if communication with the target is interrupted, since
 468    it is called from symbol reading, but should return nonzero, possibly
 469    doing a complain().  */
 470
 471 #define target_lookup_symbol(name, addrp)       \
 472   (*current_target->to_lookup_symbol) (name, addrp)
 473
 474 /* Start an inferior process and set inferior_pid to its pid.
 475    EXEC_FILE is the file to run.
 476    ALLARGS is a string containing the arguments to the program.
 477    ENV is the environment vector to pass.  Errors reported with error().
 478    On VxWorks and various standalone systems, we ignore exec_file.  */
 479
 480 #define target_create_inferior(exec_file, args, env)    \
 481         (*current_target->to_create_inferior) (exec_file, args, env)
 482
 483 /* The inferior process has died.  Do what is right.  */
 484
 485 #define target_mourn_inferior() \
 486         (*current_target->to_mourn_inferior) ()
 487
 488 /* Does target have enough data to do a run or attach command? */
 489
 490 #define target_can_run(t) \
 491         ((t)->to_can_run) ()
 492
 493 /* post process changes to signal handling in the inferior.  */
 494
 495 #define target_notice_signals(pid) \
 496         (*current_target->to_notice_signals) (pid)
 497
 498 /* Pointer to next target in the chain, e.g. a core file and an exec file.  */
 499
 500 #define target_next \
 501         (current_target->to_next)
 502
 503 /* Does the target include all of memory, or only part of it?  This
 504    determines whether we look up the target chain for other parts of
 505    memory if this target can't satisfy a request.  */
 506
 507 #define target_has_all_memory   \
 508         (current_target->to_has_all_memory)
 509
 510 /* Does the target include memory?  (Dummy targets don't.)  */
 511
 512 #define target_has_memory       \
 513         (current_target->to_has_memory)
 514
 515 /* Does the target have a stack?  (Exec files don't, VxWorks doesn't, until
 516    we start a process.)  */
 517
 518 #define target_has_stack        \
 519         (current_target->to_has_stack)
 520
 521 /* Does the target have registers?  (Exec files don't.)  */
 522
 523 #define target_has_registers    \
 524         (current_target->to_has_registers)
 525
 526 /* Does the target have execution?  Can we make it jump (through
 527    hoops), or pop its stack a few times?  FIXME: If this is to work that
 528    way, it needs to check whether an inferior actually exists.
 529    remote-udi.c and probably other targets can be the current target
 530    when the inferior doesn't actually exist at the moment.  Right now
 531    this just tells us whether this target is *capable* of execution.  */
 532
 533 #define target_has_execution    \
 534         (current_target->to_has_execution)
 535
 536 extern void target_link PARAMS ((char *, CORE_ADDR *));
 537
 538 /* Converts a process id to a string.  Usually, the string just contains
 539    `process xyz', but on some systems it may contain
 540    `process xyz thread abc'.  */
 541
 542 #ifndef target_pid_to_str
 543 #define target_pid_to_str(PID) \
 544         normal_pid_to_str (PID)
 545 extern char *normal_pid_to_str PARAMS ((int pid));
 546 #endif
 547
 548 /* Routines for maintenance of the target structures...
 549
 550    add_target:   Add a target to the list of all possible targets.
 551
 552    push_target:  Make this target the top of the stack of currently used
 553                  targets, within its particular stratum of the stack.  Result
 554                  is 0 if now atop the stack, nonzero if not on top (maybe
 555                  should warn user).
 556
 557    unpush_target: Remove this from the stack of currently used targets,
 558                  no matter where it is on the list.  Returns 0 if no
 559                  change, 1 if removed from stack.
 560
 561    pop_target:   Remove the top thing on the stack of current targets.  */
 562
 563 extern void
 564 add_target PARAMS ((struct target_ops *));
 565
 566 extern int
 567 push_target PARAMS ((struct target_ops *));
 568
 569 extern int
 570 unpush_target PARAMS ((struct target_ops *));
 571
 572 extern void
 573 target_preopen PARAMS ((int));
 574
 575 extern void
 576 pop_target PARAMS ((void));
 577
 578 /* Struct section_table maps address ranges to file sections.  It is
 579    mostly used with BFD files, but can be used without (e.g. for handling
 580    raw disks, or files not in formats handled by BFD).  */
 581
 582 struct section_table {
 583   CORE_ADDR addr;               /* Lowest address in section */
 584   CORE_ADDR endaddr;            /* 1+highest address in section */
 585
 586   sec_ptr the_bfd_section;
 587
 588   bfd      *bfd;                /* BFD file pointer */
 589 };
 590
 591 /* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
 592    Returns 0 if OK, 1 on error.  */
 593
 594 extern int
 595 build_section_table PARAMS ((bfd *, struct section_table **,
 596                              struct section_table **));
 597
 598 /* From mem-break.c */
 599
 600 extern int
 601 memory_remove_breakpoint PARAMS ((CORE_ADDR, char *));
 602
 603 extern int
 604 memory_insert_breakpoint PARAMS ((CORE_ADDR, char *));
 605
 606 /* From target.c */
 607
 608 void
 609 noprocess PARAMS ((void));
 610
 611 void
 612 find_default_attach PARAMS ((char *, int));
 613
 614 void
 615 find_default_create_inferior PARAMS ((char *, char *, char **));
 616
 617 struct target_ops *
 618 find_core_target PARAMS ((void));
 619 \f
 620 /* Stuff that should be shared among the various remote targets.  */
 621
 622 /* Debugging level.  0 is off, and non-zero values mean to print some debug
 623    information (higher values, more information).  */
 624 extern int remote_debug;
 625
 626 /* Speed in bits per second, or -1 which means don't mess with the speed.  */
 627 extern int baud_rate;
 628 \f
 629 /* Functions for helping to write a native target.  */
 630
 631 /* This is for native targets which use a unix/POSIX-style waitstatus.  */
 632 extern void store_waitstatus PARAMS ((struct target_waitstatus *, int));
 633
 634 /* Convert between host signal numbers and enum target_signal's.  */
 635 extern enum target_signal target_signal_from_host PARAMS ((int));
 636 extern int target_signal_to_host PARAMS ((enum target_signal));
 637
 638 #endif  /* !defined (TARGET_H) */