gdb/target.h

   1 /* Interface between GDB and target environments, including files and processes
   2
   3    Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
   4    2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
   5    Free Software Foundation, Inc.
   6
   7    Contributed by Cygnus Support.  Written by John Gilmore.
   8
   9    This file is part of GDB.
  10
  11    This program is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 3 of the License, or
  14    (at your option) any later version.
  15
  16    This program is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19    GNU General Public License for more details.
  20
  21    You should have received a copy of the GNU General Public License
  22    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  23
  24 #if !defined (TARGET_H)
  25 #define TARGET_H
  26
  27 struct objfile;
  28 struct ui_file;
  29 struct mem_attrib;
  30 struct target_ops;
  31 struct bp_target_info;
  32 struct regcache;
  33
  34 /* This include file defines the interface between the main part
  35    of the debugger, and the part which is target-specific, or
  36    specific to the communications interface between us and the
  37    target.
  38
  39    A TARGET is an interface between the debugger and a particular
  40    kind of file or process.  Targets can be STACKED in STRATA,
  41    so that more than one target can potentially respond to a request.
  42    In particular, memory accesses will walk down the stack of targets
  43    until they find a target that is interested in handling that particular
  44    address.  STRATA are artificial boundaries on the stack, within
  45    which particular kinds of targets live.  Strata exist so that
  46    people don't get confused by pushing e.g. a process target and then
  47    a file target, and wondering why they can't see the current values
  48    of variables any more (the file target is handling them and they
  49    never get to the process target).  So when you push a file target,
  50    it goes into the file stratum, which is always below the process
  51    stratum.  */
  52
  53 #include "bfd.h"
  54 #include "symtab.h"
  55 #include "dcache.h"
  56 #include "memattr.h"
  57 #include "vec.h"
  58 #include "gdb_signals.h"
  59
  60 enum strata
  61   {
  62     dummy_stratum,              /* The lowest of the low */
  63     file_stratum,               /* Executable files, etc */
  64     core_stratum,               /* Core dump files */
  65     process_stratum,            /* Executing processes */
  66     thread_stratum,             /* Executing threads */
  67     record_stratum              /* Support record debugging */
  68   };
  69
  70 enum thread_control_capabilities
  71   {
  72     tc_none = 0,                /* Default: can't control thread execution.  */
  73     tc_schedlock = 1,           /* Can lock the thread scheduler.  */
  74   };
  75
  76 /* Stuff for target_wait.  */
  77
  78 /* Generally, what has the program done?  */
  79 enum target_waitkind
  80   {
  81     /* The program has exited.  The exit status is in value.integer.  */
  82     TARGET_WAITKIND_EXITED,
  83
  84     /* The program has stopped with a signal.  Which signal is in
  85        value.sig.  */
  86     TARGET_WAITKIND_STOPPED,
  87
  88     /* The program has terminated with a signal.  Which signal is in
  89        value.sig.  */
  90     TARGET_WAITKIND_SIGNALLED,
  91
  92     /* The program is letting us know that it dynamically loaded something
  93        (e.g. it called load(2) on AIX).  */
  94     TARGET_WAITKIND_LOADED,
  95
  96     /* The program has forked.  A "related" process' PTID is in
  97        value.related_pid.  I.e., if the child forks, value.related_pid
  98        is the parent's ID.  */
  99
 100     TARGET_WAITKIND_FORKED,
 101
 102     /* The program has vforked.  A "related" process's PTID is in
 103        value.related_pid.  */
 104
 105     TARGET_WAITKIND_VFORKED,
 106
 107     /* The program has exec'ed a new executable file.  The new file's
 108        pathname is pointed to by value.execd_pathname.  */
 109
 110     TARGET_WAITKIND_EXECD,
 111
 112     /* The program has entered or returned from a system call.  On
 113        HP-UX, this is used in the hardware watchpoint implementation.
 114        The syscall's unique integer ID number is in value.syscall_id */
 115
 116     TARGET_WAITKIND_SYSCALL_ENTRY,
 117     TARGET_WAITKIND_SYSCALL_RETURN,
 118
 119     /* Nothing happened, but we stopped anyway.  This perhaps should be handled
 120        within target_wait, but I'm not sure target_wait should be resuming the
 121        inferior.  */
 122     TARGET_WAITKIND_SPURIOUS,
 123
 124     /* An event has occured, but we should wait again.
 125        Remote_async_wait() returns this when there is an event
 126        on the inferior, but the rest of the world is not interested in
 127        it. The inferior has not stopped, but has just sent some output
 128        to the console, for instance. In this case, we want to go back
 129        to the event loop and wait there for another event from the
 130        inferior, rather than being stuck in the remote_async_wait()
 131        function. This way the event loop is responsive to other events,
 132        like for instance the user typing.  */
 133     TARGET_WAITKIND_IGNORE,
 134
 135     /* The target has run out of history information,
 136        and cannot run backward any further.  */
 137     TARGET_WAITKIND_NO_HISTORY
 138   };
 139
 140 struct target_waitstatus
 141   {
 142     enum target_waitkind kind;
 143
 144     /* Forked child pid, execd pathname, exit status or signal number.  */
 145     union
 146       {
 147         int integer;
 148         enum target_signal sig;
 149         ptid_t related_pid;
 150         char *execd_pathname;
 151         int syscall_id;
 152       }
 153     value;
 154   };
 155
 156 /* Return a pretty printed form of target_waitstatus.
 157    Space for the result is malloc'd, caller must free.  */
 158 extern char *target_waitstatus_to_string (const struct target_waitstatus *);
 159
 160 /* Possible types of events that the inferior handler will have to
 161    deal with.  */
 162 enum inferior_event_type
 163   {
 164     /* There is a request to quit the inferior, abandon it.  */
 165     INF_QUIT_REQ,
 166     /* Process a normal inferior event which will result in target_wait
 167        being called.  */
 168     INF_REG_EVENT,
 169     /* Deal with an error on the inferior.  */
 170     INF_ERROR,
 171     /* We are called because a timer went off.  */
 172     INF_TIMER,
 173     /* We are called to do stuff after the inferior stops.  */
 174     INF_EXEC_COMPLETE,
 175     /* We are called to do some stuff after the inferior stops, but we
 176        are expected to reenter the proceed() and
 177        handle_inferior_event() functions. This is used only in case of
 178        'step n' like commands.  */
 179     INF_EXEC_CONTINUE
 180   };
 181 \f
 182 /* Target objects which can be transfered using target_read,
 183    target_write, et cetera.  */
 184
 185 enum target_object
 186 {
 187   /* AVR target specific transfer.  See "avr-tdep.c" and "remote.c".  */
 188   TARGET_OBJECT_AVR,
 189   /* SPU target specific transfer.  See "spu-tdep.c".  */
 190   TARGET_OBJECT_SPU,
 191   /* Transfer up-to LEN bytes of memory starting at OFFSET.  */
 192   TARGET_OBJECT_MEMORY,
 193   /* Memory, avoiding GDB's data cache and trusting the executable.
 194      Target implementations of to_xfer_partial never need to handle
 195      this object, and most callers should not use it.  */
 196   TARGET_OBJECT_RAW_MEMORY,
 197   /* Kernel Unwind Table.  See "ia64-tdep.c".  */
 198   TARGET_OBJECT_UNWIND_TABLE,
 199   /* Transfer auxilliary vector.  */
 200   TARGET_OBJECT_AUXV,
 201   /* StackGhost cookie.  See "sparc-tdep.c".  */
 202   TARGET_OBJECT_WCOOKIE,
 203   /* Target memory map in XML format.  */
 204   TARGET_OBJECT_MEMORY_MAP,
 205   /* Flash memory.  This object can be used to write contents to
 206      a previously erased flash memory.  Using it without erasing
 207      flash can have unexpected results.  Addresses are physical
 208      address on target, and not relative to flash start.  */
 209   TARGET_OBJECT_FLASH,
 210   /* Available target-specific features, e.g. registers and coprocessors.
 211      See "target-descriptions.c".  ANNEX should never be empty.  */
 212   TARGET_OBJECT_AVAILABLE_FEATURES,
 213   /* Currently loaded libraries, in XML format.  */
 214   TARGET_OBJECT_LIBRARIES,
 215   /* Get OS specific data.  The ANNEX specifies the type (running
 216      processes, etc.).  */
 217   TARGET_OBJECT_OSDATA,
 218   /* Extra signal info.  Usually the contents of `siginfo_t' on unix
 219      platforms.  */
 220   TARGET_OBJECT_SIGNAL_INFO,
 221   /* Possible future objects: TARGET_OBJECT_FILE, ... */
 222 };
 223
 224 /* Request that OPS transfer up to LEN 8-bit bytes of the target's
 225    OBJECT.  The OFFSET, for a seekable object, specifies the
 226    starting point.  The ANNEX can be used to provide additional
 227    data-specific information to the target.
 228
 229    Return the number of bytes actually transfered, or -1 if the
 230    transfer is not supported or otherwise fails.  Return of a positive
 231    value less than LEN indicates that no further transfer is possible.
 232    Unlike the raw to_xfer_partial interface, callers of these
 233    functions do not need to retry partial transfers.  */
 234
 235 extern LONGEST target_read (struct target_ops *ops,
 236                             enum target_object object,
 237                             const char *annex, gdb_byte *buf,
 238                             ULONGEST offset, LONGEST len);
 239
 240 extern LONGEST target_read_until_error (struct target_ops *ops,
 241                                         enum target_object object,
 242                                         const char *annex, gdb_byte *buf,
 243                                         ULONGEST offset, LONGEST len);
 244
 245 extern LONGEST target_write (struct target_ops *ops,
 246                              enum target_object object,
 247                              const char *annex, const gdb_byte *buf,
 248                              ULONGEST offset, LONGEST len);
 249
 250 /* Similar to target_write, except that it also calls PROGRESS with
 251    the number of bytes written and the opaque BATON after every
 252    successful partial write (and before the first write).  This is
 253    useful for progress reporting and user interaction while writing
 254    data.  To abort the transfer, the progress callback can throw an
 255    exception.  */
 256
 257 LONGEST target_write_with_progress (struct target_ops *ops,
 258                                     enum target_object object,
 259                                     const char *annex, const gdb_byte *buf,
 260                                     ULONGEST offset, LONGEST len,
 261                                     void (*progress) (ULONGEST, void *),
 262                                     void *baton);
 263
 264 /* Wrapper to perform a full read of unknown size.  OBJECT/ANNEX will
 265    be read using OPS.  The return value will be -1 if the transfer
 266    fails or is not supported; 0 if the object is empty; or the length
 267    of the object otherwise.  If a positive value is returned, a
 268    sufficiently large buffer will be allocated using xmalloc and
 269    returned in *BUF_P containing the contents of the object.
 270
 271    This method should be used for objects sufficiently small to store
 272    in a single xmalloc'd buffer, when no fixed bound on the object's
 273    size is known in advance.  Don't try to read TARGET_OBJECT_MEMORY
 274    through this function.  */
 275
 276 extern LONGEST target_read_alloc (struct target_ops *ops,
 277                                   enum target_object object,
 278                                   const char *annex, gdb_byte **buf_p);
 279
 280 /* Read OBJECT/ANNEX using OPS.  The result is NUL-terminated and
 281    returned as a string, allocated using xmalloc.  If an error occurs
 282    or the transfer is unsupported, NULL is returned.  Empty objects
 283    are returned as allocated but empty strings.  A warning is issued
 284    if the result contains any embedded NUL bytes.  */
 285
 286 extern char *target_read_stralloc (struct target_ops *ops,
 287                                    enum target_object object,
 288                                    const char *annex);
 289
 290 /* Wrappers to target read/write that perform memory transfers.  They
 291    throw an error if the memory transfer fails.
 292
 293    NOTE: cagney/2003-10-23: The naming schema is lifted from
 294    "frame.h".  The parameter order is lifted from get_frame_memory,
 295    which in turn lifted it from read_memory.  */
 296
 297 extern void get_target_memory (struct target_ops *ops, CORE_ADDR addr,
 298                                gdb_byte *buf, LONGEST len);
 299 extern ULONGEST get_target_memory_unsigned (struct target_ops *ops,
 300                                             CORE_ADDR addr, int len);
 301 \f
 302 struct thread_info;             /* fwd decl for parameter list below: */
 303
 304 struct target_ops
 305   {
 306     struct target_ops *beneath; /* To the target under this one.  */
 307     char *to_shortname;         /* Name this target type */
 308     char *to_longname;          /* Name for printing */
 309     char *to_doc;               /* Documentation.  Does not include trailing
 310                                    newline, and starts with a one-line descrip-
 311                                    tion (probably similar to to_longname).  */
 312     /* Per-target scratch pad.  */
 313     void *to_data;
 314     /* The open routine takes the rest of the parameters from the
 315        command, and (if successful) pushes a new target onto the
 316        stack.  Targets should supply this routine, if only to provide
 317        an error message.  */
 318     void (*to_open) (char *, int);
 319     /* Old targets with a static target vector provide "to_close".
 320        New re-entrant targets provide "to_xclose" and that is expected
 321        to xfree everything (including the "struct target_ops").  */
 322     void (*to_xclose) (struct target_ops *targ, int quitting);
 323     void (*to_close) (int);
 324     void (*to_attach) (struct target_ops *ops, char *, int);
 325     void (*to_post_attach) (int);
 326     void (*to_detach) (struct target_ops *ops, char *, int);
 327     void (*to_disconnect) (struct target_ops *, char *, int);
 328     void (*to_resume) (struct target_ops *, ptid_t, int, enum target_signal);
 329     ptid_t (*to_wait) (struct target_ops *,
 330                       ptid_t, struct target_waitstatus *);
 331     void (*to_fetch_registers) (struct target_ops *, struct regcache *, int);
 332     void (*to_store_registers) (struct target_ops *, struct regcache *, int);
 333     void (*to_prepare_to_store) (struct regcache *);
 334
 335     /* Transfer LEN bytes of memory between GDB address MYADDR and
 336        target address MEMADDR.  If WRITE, transfer them to the target, else
 337        transfer them from the target.  TARGET is the target from which we
 338        get this function.
 339
 340        Return value, N, is one of the following:
 341
 342        0 means that we can't handle this.  If errno has been set, it is the
 343        error which prevented us from doing it (FIXME: What about bfd_error?).
 344
 345        positive (call it N) means that we have transferred N bytes
 346        starting at MEMADDR.  We might be able to handle more bytes
 347        beyond this length, but no promises.
 348
 349        negative (call its absolute value N) means that we cannot
 350        transfer right at MEMADDR, but we could transfer at least
 351        something at MEMADDR + N.
 352
 353        NOTE: cagney/2004-10-01: This has been entirely superseeded by
 354        to_xfer_partial and inferior inheritance.  */
 355
 356     int (*deprecated_xfer_memory) (CORE_ADDR memaddr, gdb_byte *myaddr,
 357                                    int len, int write,
 358                                    struct mem_attrib *attrib,
 359                                    struct target_ops *target);
 360
 361     void (*to_files_info) (struct target_ops *);
 362     int (*to_insert_breakpoint) (struct bp_target_info *);
 363     int (*to_remove_breakpoint) (struct bp_target_info *);
 364     int (*to_can_use_hw_breakpoint) (int, int, int);
 365     int (*to_insert_hw_breakpoint) (struct bp_target_info *);
 366     int (*to_remove_hw_breakpoint) (struct bp_target_info *);
 367     int (*to_remove_watchpoint) (CORE_ADDR, int, int);
 368     int (*to_insert_watchpoint) (CORE_ADDR, int, int);
 369     int (*to_stopped_by_watchpoint) (void);
 370     int to_have_steppable_watchpoint;
 371     int to_have_continuable_watchpoint;
 372     int (*to_stopped_data_address) (struct target_ops *, CORE_ADDR *);
 373     int (*to_watchpoint_addr_within_range) (struct target_ops *,
 374                                             CORE_ADDR, CORE_ADDR, int);
 375     int (*to_region_ok_for_hw_watchpoint) (CORE_ADDR, int);
 376     void (*to_terminal_init) (void);
 377     void (*to_terminal_inferior) (void);
 378     void (*to_terminal_ours_for_output) (void);
 379     void (*to_terminal_ours) (void);
 380     void (*to_terminal_save_ours) (void);
 381     void (*to_terminal_info) (char *, int);
 382     void (*to_kill) (struct target_ops *);
 383     void (*to_load) (char *, int);
 384     int (*to_lookup_symbol) (char *, CORE_ADDR *);
 385     void (*to_create_inferior) (struct target_ops *,
 386                                 char *, char *, char **, int);
 387     void (*to_post_startup_inferior) (ptid_t);
 388     void (*to_acknowledge_created_inferior) (int);
 389     void (*to_insert_fork_catchpoint) (int);
 390     int (*to_remove_fork_catchpoint) (int);
 391     void (*to_insert_vfork_catchpoint) (int);
 392     int (*to_remove_vfork_catchpoint) (int);
 393     int (*to_follow_fork) (struct target_ops *, int);
 394     void (*to_insert_exec_catchpoint) (int);
 395     int (*to_remove_exec_catchpoint) (int);
 396     int (*to_has_exited) (int, int, int *);
 397     void (*to_mourn_inferior) (struct target_ops *);
 398     int (*to_can_run) (void);
 399     void (*to_notice_signals) (ptid_t ptid);
 400     int (*to_thread_alive) (struct target_ops *, ptid_t ptid);
 401     void (*to_find_new_threads) (struct target_ops *);
 402     char *(*to_pid_to_str) (struct target_ops *, ptid_t);
 403     char *(*to_extra_thread_info) (struct thread_info *);
 404     void (*to_stop) (ptid_t);
 405     void (*to_rcmd) (char *command, struct ui_file *output);
 406     char *(*to_pid_to_exec_file) (int pid);
 407     void (*to_log_command) (const char *);
 408     enum strata to_stratum;
 409     int to_has_all_memory;
 410     int to_has_memory;
 411     int to_has_stack;
 412     int to_has_registers;
 413     int to_has_execution;
 414     int to_has_thread_control;  /* control thread execution */
 415     int to_attach_no_wait;
 416     struct section_table
 417      *to_sections;
 418     struct section_table
 419      *to_sections_end;
 420     /* ASYNC target controls */
 421     int (*to_can_async_p) (void);
 422     int (*to_is_async_p) (void);
 423     void (*to_async) (void (*) (enum inferior_event_type, void *), void *);
 424     int (*to_async_mask) (int);
 425     int (*to_supports_non_stop) (void);
 426     int (*to_find_memory_regions) (int (*) (CORE_ADDR,
 427                                             unsigned long,
 428                                             int, int, int,
 429                                             void *),
 430                                    void *);
 431     char * (*to_make_corefile_notes) (bfd *, int *);
 432
 433     /* Return the thread-local address at OFFSET in the
 434        thread-local storage for the thread PTID and the shared library
 435        or executable file given by OBJFILE.  If that block of
 436        thread-local storage hasn't been allocated yet, this function
 437        may return an error.  */
 438     CORE_ADDR (*to_get_thread_local_address) (struct target_ops *ops,
 439                                               ptid_t ptid,
 440                                               CORE_ADDR load_module_addr,
 441                                               CORE_ADDR offset);
 442
 443     /* Request that OPS transfer up to LEN 8-bit bytes of the target's
 444        OBJECT.  The OFFSET, for a seekable object, specifies the
 445        starting point.  The ANNEX can be used to provide additional
 446        data-specific information to the target.
 447
 448        Return the number of bytes actually transfered, zero when no
 449        further transfer is possible, and -1 when the transfer is not
 450        supported.  Return of a positive value smaller than LEN does
 451        not indicate the end of the object, only the end of the
 452        transfer; higher level code should continue transferring if
 453        desired.  This is handled in target.c.
 454
 455        The interface does not support a "retry" mechanism.  Instead it
 456        assumes that at least one byte will be transfered on each
 457        successful call.
 458
 459        NOTE: cagney/2003-10-17: The current interface can lead to
 460        fragmented transfers.  Lower target levels should not implement
 461        hacks, such as enlarging the transfer, in an attempt to
 462        compensate for this.  Instead, the target stack should be
 463        extended so that it implements supply/collect methods and a
 464        look-aside object cache.  With that available, the lowest
 465        target can safely and freely "push" data up the stack.
 466
 467        See target_read and target_write for more information.  One,
 468        and only one, of readbuf or writebuf must be non-NULL.  */
 469
 470     LONGEST (*to_xfer_partial) (struct target_ops *ops,
 471                                 enum target_object object, const char *annex,
 472                                 gdb_byte *readbuf, const gdb_byte *writebuf,
 473                                 ULONGEST offset, LONGEST len);
 474
 475     /* Returns the memory map for the target.  A return value of NULL
 476        means that no memory map is available.  If a memory address
 477        does not fall within any returned regions, it's assumed to be
 478        RAM.  The returned memory regions should not overlap.
 479
 480        The order of regions does not matter; target_memory_map will
 481        sort regions by starting address. For that reason, this
 482        function should not be called directly except via
 483        target_memory_map.
 484
 485        This method should not cache data; if the memory map could
 486        change unexpectedly, it should be invalidated, and higher
 487        layers will re-fetch it.  */
 488     VEC(mem_region_s) *(*to_memory_map) (struct target_ops *);
 489
 490     /* Erases the region of flash memory starting at ADDRESS, of
 491        length LENGTH.
 492
 493        Precondition: both ADDRESS and ADDRESS+LENGTH should be aligned
 494        on flash block boundaries, as reported by 'to_memory_map'.  */
 495     void (*to_flash_erase) (struct target_ops *,
 496                            ULONGEST address, LONGEST length);
 497
 498     /* Finishes a flash memory write sequence.  After this operation
 499        all flash memory should be available for writing and the result
 500        of reading from areas written by 'to_flash_write' should be
 501        equal to what was written.  */
 502     void (*to_flash_done) (struct target_ops *);
 503
 504     /* Describe the architecture-specific features of this target.
 505        Returns the description found, or NULL if no description
 506        was available.  */
 507     const struct target_desc *(*to_read_description) (struct target_ops *ops);
 508
 509     /* Build the PTID of the thread on which a given task is running,
 510        based on LWP and THREAD.  These values are extracted from the
 511        task Private_Data section of the Ada Task Control Block, and
 512        their interpretation depends on the target.  */
 513     ptid_t (*to_get_ada_task_ptid) (long lwp, long thread);
 514
 515     /* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
 516        Return 0 if *READPTR is already at the end of the buffer.
 517        Return -1 if there is insufficient buffer for a whole entry.
 518        Return 1 if an entry was read into *TYPEP and *VALP.  */
 519     int (*to_auxv_parse) (struct target_ops *ops, gdb_byte **readptr,
 520                          gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp);
 521
 522     /* Search SEARCH_SPACE_LEN bytes beginning at START_ADDR for the
 523        sequence of bytes in PATTERN with length PATTERN_LEN.
 524
 525        The result is 1 if found, 0 if not found, and -1 if there was an error
 526        requiring halting of the search (e.g. memory read error).
 527        If the pattern is found the address is recorded in FOUND_ADDRP.  */
 528     int (*to_search_memory) (struct target_ops *ops,
 529                              CORE_ADDR start_addr, ULONGEST search_space_len,
 530                              const gdb_byte *pattern, ULONGEST pattern_len,
 531                              CORE_ADDR *found_addrp);
 532
 533     /* Can target execute in reverse?  */
 534     int (*to_can_execute_reverse) (void);
 535
 536     /* Does this target support debugging multiple processes
 537        simultaneously?  */
 538     int (*to_supports_multi_process) (void);
 539
 540     int to_magic;
 541     /* Need sub-structure for target machine related rather than comm related?
 542      */
 543   };
 544
 545 /* Magic number for checking ops size.  If a struct doesn't end with this
 546    number, somebody changed the declaration but didn't change all the
 547    places that initialize one.  */
 548
 549 #define OPS_MAGIC       3840
 550
 551 /* The ops structure for our "current" target process.  This should
 552    never be NULL.  If there is no target, it points to the dummy_target.  */
 553
 554 extern struct target_ops current_target;
 555
 556 /* Define easy words for doing these operations on our current target.  */
 557
 558 #define target_shortname        (current_target.to_shortname)
 559 #define target_longname         (current_target.to_longname)
 560
 561 /* Does whatever cleanup is required for a target that we are no
 562    longer going to be calling.  QUITTING indicates that GDB is exiting
 563    and should not get hung on an error (otherwise it is important to
 564    perform clean termination, even if it takes a while).  This routine
 565    is automatically always called when popping the target off the
 566    target stack (to_beneath is undefined).  Closing file descriptors
 567    and freeing all memory allocated memory are typical things it
 568    should do.  */
 569
 570 void target_close (struct target_ops *targ, int quitting);
 571
 572 /* Attaches to a process on the target side.  Arguments are as passed
 573    to the `attach' command by the user.  This routine can be called
 574    when the target is not on the target-stack, if the target_can_run
 575    routine returns 1; in that case, it must push itself onto the stack.
 576    Upon exit, the target should be ready for normal operations, and
 577    should be ready to deliver the status of the process immediately
 578    (without waiting) to an upcoming target_wait call.  */
 579
 580 void target_attach (char *, int);
 581
 582 /* Some targets don't generate traps when attaching to the inferior,
 583    or their target_attach implementation takes care of the waiting.
 584    These targets must set to_attach_no_wait.  */
 585
 586 #define target_attach_no_wait \
 587      (current_target.to_attach_no_wait)
 588
 589 /* The target_attach operation places a process under debugger control,
 590    and stops the process.
 591
 592    This operation provides a target-specific hook that allows the
 593    necessary bookkeeping to be performed after an attach completes.  */
 594 #define target_post_attach(pid) \
 595      (*current_target.to_post_attach) (pid)
 596
 597 /* Takes a program previously attached to and detaches it.
 598    The program may resume execution (some targets do, some don't) and will
 599    no longer stop on signals, etc.  We better not have left any breakpoints
 600    in the program or it'll die when it hits one.  ARGS is arguments
 601    typed by the user (e.g. a signal to send the process).  FROM_TTY
 602    says whether to be verbose or not.  */
 603
 604 extern void target_detach (char *, int);
 605
 606 /* Disconnect from the current target without resuming it (leaving it
 607    waiting for a debugger).  */
 608
 609 extern void target_disconnect (char *, int);
 610
 611 /* Resume execution of the target process PTID.  STEP says whether to
 612    single-step or to run free; SIGGNAL is the signal to be given to
 613    the target, or TARGET_SIGNAL_0 for no signal.  The caller may not
 614    pass TARGET_SIGNAL_DEFAULT.  */
 615
 616 extern void target_resume (ptid_t ptid, int step, enum target_signal signal);
 617
 618 /* Wait for process pid to do something.  PTID = -1 to wait for any
 619    pid to do something.  Return pid of child, or -1 in case of error;
 620    store status through argument pointer STATUS.  Note that it is
 621    _NOT_ OK to throw_exception() out of target_wait() without popping
 622    the debugging target from the stack; GDB isn't prepared to get back
 623    to the prompt with a debugging target but without the frame cache,
 624    stop_pc, etc., set up.  */
 625
 626 extern ptid_t target_wait (ptid_t ptid, struct target_waitstatus *status);
 627
 628 /* Fetch at least register REGNO, or all regs if regno == -1.  No result.  */
 629
 630 extern void target_fetch_registers (struct regcache *regcache, int regno);
 631
 632 /* Store at least register REGNO, or all regs if REGNO == -1.
 633    It can store as many registers as it wants to, so target_prepare_to_store
 634    must have been previously called.  Calls error() if there are problems.  */
 635
 636 extern void target_store_registers (struct regcache *regcache, int regs);
 637
 638 /* Get ready to modify the registers array.  On machines which store
 639    individual registers, this doesn't need to do anything.  On machines
 640    which store all the registers in one fell swoop, this makes sure
 641    that REGISTERS contains all the registers from the program being
 642    debugged.  */
 643
 644 #define target_prepare_to_store(regcache)       \
 645      (*current_target.to_prepare_to_store) (regcache)
 646
 647 /* Returns true if this target can debug multiple processes
 648    simultaneously.  */
 649
 650 #define target_supports_multi_process() \
 651      (*current_target.to_supports_multi_process) ()
 652
 653 extern DCACHE *target_dcache;
 654
 655 extern int target_read_string (CORE_ADDR, char **, int, int *);
 656
 657 extern int target_read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len);
 658
 659 extern int target_write_memory (CORE_ADDR memaddr, const gdb_byte *myaddr,
 660                                 int len);
 661
 662 extern int xfer_memory (CORE_ADDR, gdb_byte *, int, int,
 663                         struct mem_attrib *, struct target_ops *);
 664
 665 /* Fetches the target's memory map.  If one is found it is sorted
 666    and returned, after some consistency checking.  Otherwise, NULL
 667    is returned.  */
 668 VEC(mem_region_s) *target_memory_map (void);
 669
 670 /* Erase the specified flash region.  */
 671 void target_flash_erase (ULONGEST address, LONGEST length);
 672
 673 /* Finish a sequence of flash operations.  */
 674 void target_flash_done (void);
 675
 676 /* Describes a request for a memory write operation.  */
 677 struct memory_write_request
 678   {
 679     /* Begining address that must be written. */
 680     ULONGEST begin;
 681     /* Past-the-end address. */
 682     ULONGEST end;
 683     /* The data to write. */
 684     gdb_byte *data;
 685     /* A callback baton for progress reporting for this request.  */
 686     void *baton;
 687   };
 688 typedef struct memory_write_request memory_write_request_s;
 689 DEF_VEC_O(memory_write_request_s);
 690
 691 /* Enumeration specifying different flash preservation behaviour.  */
 692 enum flash_preserve_mode
 693   {
 694     flash_preserve,
 695     flash_discard
 696   };
 697
 698 /* Write several memory blocks at once.  This version can be more
 699    efficient than making several calls to target_write_memory, in
 700    particular because it can optimize accesses to flash memory.
 701
 702    Moreover, this is currently the only memory access function in gdb
 703    that supports writing to flash memory, and it should be used for
 704    all cases where access to flash memory is desirable.
 705
 706    REQUESTS is the vector (see vec.h) of memory_write_request.
 707    PRESERVE_FLASH_P indicates what to do with blocks which must be
 708      erased, but not completely rewritten.
 709    PROGRESS_CB is a function that will be periodically called to provide
 710      feedback to user.  It will be called with the baton corresponding
 711      to the request currently being written.  It may also be called
 712      with a NULL baton, when preserved flash sectors are being rewritten.
 713
 714    The function returns 0 on success, and error otherwise.  */
 715 int target_write_memory_blocks (VEC(memory_write_request_s) *requests,
 716                                 enum flash_preserve_mode preserve_flash_p,
 717                                 void (*progress_cb) (ULONGEST, void *));
 718
 719 /* From infrun.c.  */
 720
 721 extern int inferior_has_forked (ptid_t pid, ptid_t *child_pid);
 722
 723 extern int inferior_has_vforked (ptid_t pid, ptid_t *child_pid);
 724
 725 extern int inferior_has_execd (ptid_t pid, char **execd_pathname);
 726
 727 /* From exec.c */
 728
 729 extern void print_section_info (struct target_ops *, bfd *);
 730
 731 /* Print a line about the current target.  */
 732
 733 #define target_files_info()     \
 734      (*current_target.to_files_info) (&current_target)
 735
 736 /* Insert a breakpoint at address BP_TGT->placed_address in the target
 737    machine.  Result is 0 for success, or an errno value.  */
 738
 739 #define target_insert_breakpoint(bp_tgt)        \
 740      (*current_target.to_insert_breakpoint) (bp_tgt)
 741
 742 /* Remove a breakpoint at address BP_TGT->placed_address in the target
 743    machine.  Result is 0 for success, or an errno value.  */
 744
 745 #define target_remove_breakpoint(bp_tgt)        \
 746      (*current_target.to_remove_breakpoint) (bp_tgt)
 747
 748 /* Initialize the terminal settings we record for the inferior,
 749    before we actually run the inferior.  */
 750
 751 #define target_terminal_init() \
 752      (*current_target.to_terminal_init) ()
 753
 754 /* Put the inferior's terminal settings into effect.
 755    This is preparation for starting or resuming the inferior.  */
 756
 757 #define target_terminal_inferior() \
 758      (*current_target.to_terminal_inferior) ()
 759
 760 /* Put some of our terminal settings into effect,
 761    enough to get proper results from our output,
 762    but do not change into or out of RAW mode
 763    so that no input is discarded.
 764
 765    After doing this, either terminal_ours or terminal_inferior
 766    should be called to get back to a normal state of affairs.  */
 767
 768 #define target_terminal_ours_for_output() \
 769      (*current_target.to_terminal_ours_for_output) ()
 770
 771 /* Put our terminal settings into effect.
 772    First record the inferior's terminal settings
 773    so they can be restored properly later.  */
 774
 775 #define target_terminal_ours() \
 776      (*current_target.to_terminal_ours) ()
 777
 778 /* Save our terminal settings.
 779    This is called from TUI after entering or leaving the curses
 780    mode.  Since curses modifies our terminal this call is here
 781    to take this change into account.  */
 782
 783 #define target_terminal_save_ours() \
 784      (*current_target.to_terminal_save_ours) ()
 785
 786 /* Print useful information about our terminal status, if such a thing
 787    exists.  */
 788
 789 #define target_terminal_info(arg, from_tty) \
 790      (*current_target.to_terminal_info) (arg, from_tty)
 791
 792 /* Kill the inferior process.   Make it go away.  */
 793
 794 extern void target_kill (void);
 795
 796 /* Load an executable file into the target process.  This is expected
 797    to not only bring new code into the target process, but also to
 798    update GDB's symbol tables to match.
 799
 800    ARG contains command-line arguments, to be broken down with
 801    buildargv ().  The first non-switch argument is the filename to
 802    load, FILE; the second is a number (as parsed by strtoul (..., ...,
 803    0)), which is an offset to apply to the load addresses of FILE's
 804    sections.  The target may define switches, or other non-switch
 805    arguments, as it pleases.  */
 806
 807 extern void target_load (char *arg, int from_tty);
 808
 809 /* Look up a symbol in the target's symbol table.  NAME is the symbol
 810    name.  ADDRP is a CORE_ADDR * pointing to where the value of the
 811    symbol should be returned.  The result is 0 if successful, nonzero
 812    if the symbol does not exist in the target environment.  This
 813    function should not call error() if communication with the target
 814    is interrupted, since it is called from symbol reading, but should
 815    return nonzero, possibly doing a complain().  */
 816
 817 #define target_lookup_symbol(name, addrp) \
 818      (*current_target.to_lookup_symbol) (name, addrp)
 819
 820 /* Start an inferior process and set inferior_ptid to its pid.
 821    EXEC_FILE is the file to run.
 822    ALLARGS is a string containing the arguments to the program.
 823    ENV is the environment vector to pass.  Errors reported with error().
 824    On VxWorks and various standalone systems, we ignore exec_file.  */
 825
 826 void target_create_inferior (char *exec_file, char *args,
 827                              char **env, int from_tty);
 828
 829 /* Some targets (such as ttrace-based HPUX) don't allow us to request
 830    notification of inferior events such as fork and vork immediately
 831    after the inferior is created.  (This because of how gdb gets an
 832    inferior created via invoking a shell to do it.  In such a scenario,
 833    if the shell init file has commands in it, the shell will fork and
 834    exec for each of those commands, and we will see each such fork
 835    event.  Very bad.)
 836
 837    Such targets will supply an appropriate definition for this function.  */
 838
 839 #define target_post_startup_inferior(ptid) \
 840      (*current_target.to_post_startup_inferior) (ptid)
 841
 842 /* On some targets, the sequence of starting up an inferior requires
 843    some synchronization between gdb and the new inferior process, PID.  */
 844
 845 #define target_acknowledge_created_inferior(pid) \
 846      (*current_target.to_acknowledge_created_inferior) (pid)
 847
 848 /* On some targets, we can catch an inferior fork or vfork event when
 849    it occurs.  These functions insert/remove an already-created
 850    catchpoint for such events.  */
 851
 852 #define target_insert_fork_catchpoint(pid) \
 853      (*current_target.to_insert_fork_catchpoint) (pid)
 854
 855 #define target_remove_fork_catchpoint(pid) \
 856      (*current_target.to_remove_fork_catchpoint) (pid)
 857
 858 #define target_insert_vfork_catchpoint(pid) \
 859      (*current_target.to_insert_vfork_catchpoint) (pid)
 860
 861 #define target_remove_vfork_catchpoint(pid) \
 862      (*current_target.to_remove_vfork_catchpoint) (pid)
 863
 864 /* If the inferior forks or vforks, this function will be called at
 865    the next resume in order to perform any bookkeeping and fiddling
 866    necessary to continue debugging either the parent or child, as
 867    requested, and releasing the other.  Information about the fork
 868    or vfork event is available via get_last_target_status ().
 869    This function returns 1 if the inferior should not be resumed
 870    (i.e. there is another event pending).  */
 871
 872 int target_follow_fork (int follow_child);
 873
 874 /* On some targets, we can catch an inferior exec event when it
 875    occurs.  These functions insert/remove an already-created
 876    catchpoint for such events.  */
 877
 878 #define target_insert_exec_catchpoint(pid) \
 879      (*current_target.to_insert_exec_catchpoint) (pid)
 880
 881 #define target_remove_exec_catchpoint(pid) \
 882      (*current_target.to_remove_exec_catchpoint) (pid)
 883
 884 /* Returns TRUE if PID has exited.  And, also sets EXIT_STATUS to the
 885    exit code of PID, if any.  */
 886
 887 #define target_has_exited(pid,wait_status,exit_status) \
 888      (*current_target.to_has_exited) (pid,wait_status,exit_status)
 889
 890 /* The debugger has completed a blocking wait() call.  There is now
 891    some process event that must be processed.  This function should
 892    be defined by those targets that require the debugger to perform
 893    cleanup or internal state changes in response to the process event.  */
 894
 895 /* The inferior process has died.  Do what is right.  */
 896
 897 void target_mourn_inferior (void);
 898
 899 /* Does target have enough data to do a run or attach command? */
 900
 901 #define target_can_run(t) \
 902      ((t)->to_can_run) ()
 903
 904 /* post process changes to signal handling in the inferior.  */
 905
 906 #define target_notice_signals(ptid) \
 907      (*current_target.to_notice_signals) (ptid)
 908
 909 /* Check to see if a thread is still alive.  */
 910
 911 extern int target_thread_alive (ptid_t ptid);
 912
 913 /* Query for new threads and add them to the thread list.  */
 914
 915 extern void target_find_new_threads (void);
 916
 917 /* Make target stop in a continuable fashion.  (For instance, under
 918    Unix, this should act like SIGSTOP).  This function is normally
 919    used by GUIs to implement a stop button.  */
 920
 921 #define target_stop(ptid) (*current_target.to_stop) (ptid)
 922
 923 /* Send the specified COMMAND to the target's monitor
 924    (shell,interpreter) for execution.  The result of the query is
 925    placed in OUTBUF.  */
 926
 927 #define target_rcmd(command, outbuf) \
 928      (*current_target.to_rcmd) (command, outbuf)
 929
 930
 931 /* Does the target include all of memory, or only part of it?  This
 932    determines whether we look up the target chain for other parts of
 933    memory if this target can't satisfy a request.  */
 934
 935 #define target_has_all_memory   \
 936      (current_target.to_has_all_memory)
 937
 938 /* Does the target include memory?  (Dummy targets don't.)  */
 939
 940 #define target_has_memory       \
 941      (current_target.to_has_memory)
 942
 943 /* Does the target have a stack?  (Exec files don't, VxWorks doesn't, until
 944    we start a process.)  */
 945
 946 #define target_has_stack        \
 947      (current_target.to_has_stack)
 948
 949 /* Does the target have registers?  (Exec files don't.)  */
 950
 951 #define target_has_registers    \
 952      (current_target.to_has_registers)
 953
 954 /* Does the target have execution?  Can we make it jump (through
 955    hoops), or pop its stack a few times?  This means that the current
 956    target is currently executing; for some targets, that's the same as
 957    whether or not the target is capable of execution, but there are
 958    also targets which can be current while not executing.  In that
 959    case this will become true after target_create_inferior or
 960    target_attach.  */
 961
 962 #define target_has_execution    \
 963      (current_target.to_has_execution)
 964
 965 /* Can the target support the debugger control of thread execution?
 966    Can it lock the thread scheduler?  */
 967
 968 #define target_can_lock_scheduler \
 969      (current_target.to_has_thread_control & tc_schedlock)
 970
 971 /* Should the target enable async mode if it is supported?  Temporary
 972    cludge until async mode is a strict superset of sync mode.  */
 973 extern int target_async_permitted;
 974
 975 /* Can the target support asynchronous execution? */
 976 #define target_can_async_p() (current_target.to_can_async_p ())
 977
 978 /* Is the target in asynchronous execution mode? */
 979 #define target_is_async_p() (current_target.to_is_async_p ())
 980
 981 int target_supports_non_stop (void);
 982
 983 /* Put the target in async mode with the specified callback function. */
 984 #define target_async(CALLBACK,CONTEXT) \
 985      (current_target.to_async ((CALLBACK), (CONTEXT)))
 986
 987 /* This is to be used ONLY within call_function_by_hand(). It provides
 988    a workaround, to have inferior function calls done in sychronous
 989    mode, even though the target is asynchronous. After
 990    target_async_mask(0) is called, calls to target_can_async_p() will
 991    return FALSE , so that target_resume() will not try to start the
 992    target asynchronously. After the inferior stops, we IMMEDIATELY
 993    restore the previous nature of the target, by calling
 994    target_async_mask(1). After that, target_can_async_p() will return
 995    TRUE. ANY OTHER USE OF THIS FEATURE IS DEPRECATED.
 996
 997    FIXME ezannoni 1999-12-13: we won't need this once we move
 998    the turning async on and off to the single execution commands,
 999    from where it is done currently, in remote_resume().  */
1000
1001 #define target_async_mask(MASK) \
1002   (current_target.to_async_mask (MASK))
1003
1004 /* Converts a process id to a string.  Usually, the string just contains
1005    `process xyz', but on some systems it may contain
1006    `process xyz thread abc'.  */
1007
1008 extern char *target_pid_to_str (ptid_t ptid);
1009
1010 extern char *normal_pid_to_str (ptid_t ptid);
1011
1012 /* Return a short string describing extra information about PID,
1013    e.g. "sleeping", "runnable", "running on LWP 3".  Null return value
1014    is okay.  */
1015
1016 #define target_extra_thread_info(TP) \
1017      (current_target.to_extra_thread_info (TP))
1018
1019 /* Attempts to find the pathname of the executable file
1020    that was run to create a specified process.
1021
1022    The process PID must be stopped when this operation is used.
1023
1024    If the executable file cannot be determined, NULL is returned.
1025
1026    Else, a pointer to a character string containing the pathname
1027    is returned.  This string should be copied into a buffer by
1028    the client if the string will not be immediately used, or if
1029    it must persist.  */
1030
1031 #define target_pid_to_exec_file(pid) \
1032      (current_target.to_pid_to_exec_file) (pid)
1033
1034 /*
1035  * Iterator function for target memory regions.
1036  * Calls a callback function once for each memory region 'mapped'
1037  * in the child process.  Defined as a simple macro rather than
1038  * as a function macro so that it can be tested for nullity.
1039  */
1040
1041 #define target_find_memory_regions(FUNC, DATA) \
1042      (current_target.to_find_memory_regions) (FUNC, DATA)
1043
1044 /*
1045  * Compose corefile .note section.
1046  */
1047
1048 #define target_make_corefile_notes(BFD, SIZE_P) \
1049      (current_target.to_make_corefile_notes) (BFD, SIZE_P)
1050
1051 /* Hardware watchpoint interfaces.  */
1052
1053 /* Returns non-zero if we were stopped by a hardware watchpoint (memory read or
1054    write).  */
1055
1056 #define target_stopped_by_watchpoint \
1057    (*current_target.to_stopped_by_watchpoint)
1058
1059 /* Non-zero if we have steppable watchpoints  */
1060
1061 #define target_have_steppable_watchpoint \
1062    (current_target.to_have_steppable_watchpoint)
1063
1064 /* Non-zero if we have continuable watchpoints  */
1065
1066 #define target_have_continuable_watchpoint \
1067    (current_target.to_have_continuable_watchpoint)
1068
1069 /* Provide defaults for hardware watchpoint functions.  */
1070
1071 /* If the *_hw_beakpoint functions have not been defined
1072    elsewhere use the definitions in the target vector.  */
1073
1074 /* Returns non-zero if we can set a hardware watchpoint of type TYPE.  TYPE is
1075    one of bp_hardware_watchpoint, bp_read_watchpoint, bp_write_watchpoint, or
1076    bp_hardware_breakpoint.  CNT is the number of such watchpoints used so far
1077    (including this one?).  OTHERTYPE is who knows what...  */
1078
1079 #define target_can_use_hardware_watchpoint(TYPE,CNT,OTHERTYPE) \
1080  (*current_target.to_can_use_hw_breakpoint) (TYPE, CNT, OTHERTYPE);
1081
1082 #define target_region_ok_for_hw_watchpoint(addr, len) \
1083     (*current_target.to_region_ok_for_hw_watchpoint) (addr, len)
1084
1085
1086 /* Set/clear a hardware watchpoint starting at ADDR, for LEN bytes.  TYPE is 0
1087    for write, 1 for read, and 2 for read/write accesses.  Returns 0 for
1088    success, non-zero for failure.  */
1089
1090 #define target_insert_watchpoint(addr, len, type)       \
1091      (*current_target.to_insert_watchpoint) (addr, len, type)
1092
1093 #define target_remove_watchpoint(addr, len, type)       \
1094      (*current_target.to_remove_watchpoint) (addr, len, type)
1095
1096 #define target_insert_hw_breakpoint(bp_tgt) \
1097      (*current_target.to_insert_hw_breakpoint) (bp_tgt)
1098
1099 #define target_remove_hw_breakpoint(bp_tgt) \
1100      (*current_target.to_remove_hw_breakpoint) (bp_tgt)
1101
1102 #define target_stopped_data_address(target, x) \
1103     (*target.to_stopped_data_address) (target, x)
1104
1105 #define target_watchpoint_addr_within_range(target, addr, start, length) \
1106   (*target.to_watchpoint_addr_within_range) (target, addr, start, length)
1107
1108 /* Target can execute in reverse?  */
1109 #define target_can_execute_reverse \
1110      (current_target.to_can_execute_reverse ? \
1111       current_target.to_can_execute_reverse () : 0)
1112
1113 extern const struct target_desc *target_read_description (struct target_ops *);
1114
1115 #define target_get_ada_task_ptid(lwp, tid) \
1116      (*current_target.to_get_ada_task_ptid) (lwp,tid)
1117
1118 /* Utility implementation of searching memory.  */
1119 extern int simple_search_memory (struct target_ops* ops,
1120                                  CORE_ADDR start_addr,
1121                                  ULONGEST search_space_len,
1122                                  const gdb_byte *pattern,
1123                                  ULONGEST pattern_len,
1124                                  CORE_ADDR *found_addrp);
1125
1126 /* Main entry point for searching memory.  */
1127 extern int target_search_memory (CORE_ADDR start_addr,
1128                                  ULONGEST search_space_len,
1129                                  const gdb_byte *pattern,
1130                                  ULONGEST pattern_len,
1131                                  CORE_ADDR *found_addrp);
1132
1133 /* Command logging facility.  */
1134
1135 #define target_log_command(p)                                           \
1136   do                                                                    \
1137     if (current_target.to_log_command)                                  \
1138       (*current_target.to_log_command) (p);                             \
1139   while (0)
1140
1141 /* Routines for maintenance of the target structures...
1142
1143    add_target:   Add a target to the list of all possible targets.
1144
1145    push_target:  Make this target the top of the stack of currently used
1146    targets, within its particular stratum of the stack.  Result
1147    is 0 if now atop the stack, nonzero if not on top (maybe
1148    should warn user).
1149
1150    unpush_target: Remove this from the stack of currently used targets,
1151    no matter where it is on the list.  Returns 0 if no
1152    change, 1 if removed from stack.
1153
1154    pop_target:   Remove the top thing on the stack of current targets.  */
1155
1156 extern void add_target (struct target_ops *);
1157
1158 extern int push_target (struct target_ops *);
1159
1160 extern int unpush_target (struct target_ops *);
1161
1162 extern void target_pre_inferior (int);
1163
1164 extern void target_preopen (int);
1165
1166 extern void pop_target (void);
1167
1168 /* Does whatever cleanup is required to get rid of all pushed targets.
1169    QUITTING is propagated to target_close; it indicates that GDB is
1170    exiting and should not get hung on an error (otherwise it is
1171    important to perform clean termination, even if it takes a
1172    while).  */
1173 extern void pop_all_targets (int quitting);
1174
1175 /* Like pop_all_targets, but pops only targets whose stratum is
1176    strictly above ABOVE_STRATUM.  */
1177 extern void pop_all_targets_above (enum strata above_stratum, int quitting);
1178
1179 extern CORE_ADDR target_translate_tls_address (struct objfile *objfile,
1180                                                CORE_ADDR offset);
1181
1182 /* Mark a pushed target as running or exited, for targets which do not
1183    automatically pop when not active.  */
1184
1185 void target_mark_running (struct target_ops *);
1186
1187 void target_mark_exited (struct target_ops *);
1188
1189 /* Struct section_table maps address ranges to file sections.  It is
1190    mostly used with BFD files, but can be used without (e.g. for handling
1191    raw disks, or files not in formats handled by BFD).  */
1192
1193 struct section_table
1194   {
1195     CORE_ADDR addr;             /* Lowest address in section */
1196     CORE_ADDR endaddr;          /* 1+highest address in section */
1197
1198     struct bfd_section *the_bfd_section;
1199
1200     bfd *bfd;                   /* BFD file pointer */
1201   };
1202
1203 /* Return the "section" containing the specified address.  */
1204 struct section_table *target_section_by_addr (struct target_ops *target,
1205                                               CORE_ADDR addr);
1206
1207
1208 /* From mem-break.c */
1209
1210 extern int memory_remove_breakpoint (struct bp_target_info *);
1211
1212 extern int memory_insert_breakpoint (struct bp_target_info *);
1213
1214 extern int default_memory_remove_breakpoint (struct gdbarch *, struct bp_target_info *);
1215
1216 extern int default_memory_insert_breakpoint (struct gdbarch *, struct bp_target_info *);
1217
1218
1219 /* From target.c */
1220
1221 extern void initialize_targets (void);
1222
1223 extern NORETURN void noprocess (void) ATTR_NORETURN;
1224
1225 extern void target_require_runnable (void);
1226
1227 extern void find_default_attach (struct target_ops *, char *, int);
1228
1229 extern void find_default_create_inferior (struct target_ops *,
1230                                           char *, char *, char **, int);
1231
1232 extern struct target_ops *find_run_target (void);
1233
1234 extern struct target_ops *find_core_target (void);
1235
1236 extern struct target_ops *find_target_beneath (struct target_ops *);
1237
1238 extern int target_resize_to_sections (struct target_ops *target,
1239                                       int num_added);
1240
1241 extern void remove_target_sections (bfd *abfd);
1242
1243 /* Read OS data object of type TYPE from the target, and return it in
1244    XML format.  The result is NUL-terminated and returned as a string,
1245    allocated using xmalloc.  If an error occurs or the transfer is
1246    unsupported, NULL is returned.  Empty objects are returned as
1247    allocated but empty strings.  */
1248
1249 extern char *target_get_osdata (const char *type);
1250
1251 \f
1252 /* Stuff that should be shared among the various remote targets.  */
1253
1254 /* Debugging level.  0 is off, and non-zero values mean to print some debug
1255    information (higher values, more information).  */
1256 extern int remote_debug;
1257
1258 /* Speed in bits per second, or -1 which means don't mess with the speed.  */
1259 extern int baud_rate;
1260 /* Timeout limit for response from target. */
1261 extern int remote_timeout;
1262
1263 \f
1264 /* Functions for helping to write a native target.  */
1265
1266 /* This is for native targets which use a unix/POSIX-style waitstatus.  */
1267 extern void store_waitstatus (struct target_waitstatus *, int);
1268
1269 /* These are in common/signals.c, but they're only used by gdb.  */
1270 extern enum target_signal default_target_signal_from_host (struct gdbarch *,
1271                                                            int);
1272 extern int default_target_signal_to_host (struct gdbarch *,
1273                                           enum target_signal);
1274
1275 /* Convert from a number used in a GDB command to an enum target_signal.  */
1276 extern enum target_signal target_signal_from_command (int);
1277 /* End of files in common/signals.c.  */
1278
1279 /* Set the show memory breakpoints mode to show, and installs a cleanup
1280    to restore it back to the current value.  */
1281 extern struct cleanup *make_show_memory_breakpoints_cleanup (int show);
1282
1283 \f
1284 /* Imported from machine dependent code */
1285
1286 /* Blank target vector entries are initialized to target_ignore. */
1287 void target_ignore (void);
1288
1289 extern struct target_ops deprecated_child_ops;
1290
1291 #endif /* !defined (TARGET_H) */