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