gdb/gdbserver/target.h

   1 /* Target operations for the remote server for GDB.
   2    Copyright (C) 2002-2015 Free Software Foundation, Inc.
   3
   4    Contributed by MontaVista Software.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef TARGET_H
  22 #define TARGET_H
  23
  24 #include <sys/types.h> /* for mode_t */
  25 #include "target/target.h"
  26 #include "target/resume.h"
  27 #include "target/wait.h"
  28 #include "target/waitstatus.h"
  29 #include "mem-break.h"
  30 #include "btrace-common.h"
  31
  32 struct emit_ops;
  33 struct buffer;
  34 struct process_info;
  35
  36 /* This structure describes how to resume a particular thread (or all
  37    threads) based on the client's request.  If thread is -1, then this
  38    entry applies to all threads.  These are passed around as an
  39    array.  */
  40
  41 struct thread_resume
  42 {
  43   ptid_t thread;
  44
  45   /* How to "resume".  */
  46   enum resume_kind kind;
  47
  48   /* If non-zero, send this signal when we resume, or to stop the
  49      thread.  If stopping a thread, and this is 0, the target should
  50      stop the thread however it best decides to (e.g., SIGSTOP on
  51      linux; SuspendThread on win32).  This is a host signal value (not
  52      enum gdb_signal).  */
  53   int sig;
  54
  55   /* Range to single step within.  Valid only iff KIND is resume_step.
  56
  57      Single-step once, and then continuing stepping as long as the
  58      thread stops in this range.  (If the range is empty
  59      [STEP_RANGE_START == STEP_RANGE_END], then this is a single-step
  60      request.)  */
  61   CORE_ADDR step_range_start;   /* Inclusive */
  62   CORE_ADDR step_range_end;     /* Exclusive */
  63 };
  64
  65 struct target_ops
  66 {
  67   /* Start a new process.
  68
  69      PROGRAM is a path to the program to execute.
  70      ARGS is a standard NULL-terminated array of arguments,
  71      to be passed to the inferior as ``argv''.
  72
  73      Returns the new PID on success, -1 on failure.  Registers the new
  74      process with the process list.  */
  75
  76   int (*create_inferior) (char *program, char **args);
  77
  78   /* Do additional setup after a new process is created, including
  79      exec-wrapper completion.  */
  80   void (*post_create_inferior) (void);
  81
  82   /* Attach to a running process.
  83
  84      PID is the process ID to attach to, specified by the user
  85      or a higher layer.
  86
  87      Returns -1 if attaching is unsupported, 0 on success, and calls
  88      error() otherwise.  */
  89
  90   int (*attach) (unsigned long pid);
  91
  92   /* Kill inferior PID.  Return -1 on failure, and 0 on success.  */
  93
  94   int (*kill) (int pid);
  95
  96   /* Detach from inferior PID. Return -1 on failure, and 0 on
  97      success.  */
  98
  99   int (*detach) (int pid);
 100
 101   /* The inferior process has died.  Do what is right.  */
 102
 103   void (*mourn) (struct process_info *proc);
 104
 105   /* Wait for inferior PID to exit.  */
 106   void (*join) (int pid);
 107
 108   /* Return 1 iff the thread with process ID PID is alive.  */
 109
 110   int (*thread_alive) (ptid_t pid);
 111
 112   /* Resume the inferior process.  */
 113
 114   void (*resume) (struct thread_resume *resume_info, size_t n);
 115
 116   /* Wait for the inferior process or thread to change state.  Store
 117      status through argument pointer STATUS.
 118
 119      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 120      wait for any thread of process pid to do something.  Return ptid
 121      of child, or -1 in case of error; store status through argument
 122      pointer STATUS.  OPTIONS is a bit set of options defined as
 123      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 124      no child stop to report, return is
 125      null_ptid/TARGET_WAITKIND_IGNORE.  */
 126
 127   ptid_t (*wait) (ptid_t ptid, struct target_waitstatus *status, int options);
 128
 129   /* Fetch registers from the inferior process.
 130
 131      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 132
 133   void (*fetch_registers) (struct regcache *regcache, int regno);
 134
 135   /* Store registers to the inferior process.
 136
 137      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 138
 139   void (*store_registers) (struct regcache *regcache, int regno);
 140
 141   /* Prepare to read or write memory from the inferior process.
 142      Targets use this to do what is necessary to get the state of the
 143      inferior such that it is possible to access memory.
 144
 145      This should generally only be called from client facing routines,
 146      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 147      insertion routine.
 148
 149      Like `read_memory' and `write_memory' below, returns 0 on success
 150      and errno on failure.  */
 151
 152   int (*prepare_to_access_memory) (void);
 153
 154   /* Undo the effects of prepare_to_access_memory.  */
 155
 156   void (*done_accessing_memory) (void);
 157
 158   /* Read memory from the inferior process.  This should generally be
 159      called through read_inferior_memory, which handles breakpoint shadowing.
 160
 161      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 162
 163      Returns 0 on success and errno on failure.  */
 164
 165   int (*read_memory) (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 166
 167   /* Write memory to the inferior process.  This should generally be
 168      called through write_inferior_memory, which handles breakpoint shadowing.
 169
 170      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 171
 172      Returns 0 on success and errno on failure.  */
 173
 174   int (*write_memory) (CORE_ADDR memaddr, const unsigned char *myaddr,
 175                        int len);
 176
 177   /* Query GDB for the values of any symbols we're interested in.
 178      This function is called whenever we receive a "qSymbols::"
 179      query, which corresponds to every time more symbols (might)
 180      become available.  NULL if we aren't interested in any
 181      symbols.  */
 182
 183   void (*look_up_symbols) (void);
 184
 185   /* Send an interrupt request to the inferior process,
 186      however is appropriate.  */
 187
 188   void (*request_interrupt) (void);
 189
 190   /* Read auxiliary vector data from the inferior process.
 191
 192      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 193
 194   int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
 195                     unsigned int len);
 196
 197   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 198      otherwise.  The type is coded as follows:
 199        '0' - software-breakpoint
 200        '1' - hardware-breakpoint
 201        '2' - write watchpoint
 202        '3' - read watchpoint
 203        '4' - access watchpoint
 204   */
 205   int (*supports_z_point_type) (char z_type);
 206
 207   /* Insert and remove a break or watchpoint.
 208      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 209
 210   int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 211                        int size, struct raw_breakpoint *bp);
 212   int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 213                        int size, struct raw_breakpoint *bp);
 214
 215   /* Returns 1 if the target stopped because it executed a software
 216      breakpoint instruction, 0 otherwise.  */
 217   int (*stopped_by_sw_breakpoint) (void);
 218
 219   /* Returns true if the target knows whether a trap was caused by a
 220      SW breakpoint triggering.  */
 221   int (*supports_stopped_by_sw_breakpoint) (void);
 222
 223   /* Returns 1 if the target stopped for a hardware breakpoint.  */
 224   int (*stopped_by_hw_breakpoint) (void);
 225
 226   /* Returns true if the target knows whether a trap was caused by a
 227      HW breakpoint triggering.  */
 228   int (*supports_stopped_by_hw_breakpoint) (void);
 229
 230   /* Returns true if the target can do hardware single step.  */
 231   int (*supports_hardware_single_step) (void);
 232
 233   /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise.  */
 234
 235   int (*stopped_by_watchpoint) (void);
 236
 237   /* Returns the address associated with the watchpoint that hit, if any;
 238      returns 0 otherwise.  */
 239
 240   CORE_ADDR (*stopped_data_address) (void);
 241
 242   /* Reports the text, data offsets of the executable.  This is
 243      needed for uclinux where the executable is relocated during load
 244      time.  */
 245
 246   int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
 247
 248   /* Fetch the address associated with a specific thread local storage
 249      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 250      Stores it in *ADDRESS and returns zero on success; otherwise returns
 251      an error code.  A return value of -1 means this system does not
 252      support the operation.  */
 253
 254   int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
 255                           CORE_ADDR load_module, CORE_ADDR *address);
 256
 257    /* Read/Write from/to spufs using qXfer packets.  */
 258   int (*qxfer_spu) (const char *annex, unsigned char *readbuf,
 259                     unsigned const char *writebuf, CORE_ADDR offset, int len);
 260
 261   /* Fill BUF with an hostio error packet representing the last hostio
 262      error.  */
 263   void (*hostio_last_error) (char *buf);
 264
 265   /* Read/Write OS data using qXfer packets.  */
 266   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
 267                        unsigned const char *writebuf, CORE_ADDR offset,
 268                        int len);
 269
 270   /* Read/Write extra signal info.  */
 271   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
 272                         unsigned const char *writebuf,
 273                         CORE_ADDR offset, int len);
 274
 275   int (*supports_non_stop) (void);
 276
 277   /* Enables async target events.  Returns the previous enable
 278      state.  */
 279   int (*async) (int enable);
 280
 281   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
 282      success, -1 otherwise.  */
 283   int (*start_non_stop) (int);
 284
 285   /* Returns true if the target supports multi-process debugging.  */
 286   int (*supports_multi_process) (void);
 287
 288   /* Returns true if fork events are supported.  */
 289   int (*supports_fork_events) (void);
 290
 291   /* Returns true if vfork events are supported.  */
 292   int (*supports_vfork_events) (void);
 293
 294   /* Returns true if exec events are supported.  */
 295   int (*supports_exec_events) (void);
 296
 297   /* Allows target to re-initialize connection-specific settings.  */
 298   void (*handle_new_gdb_connection) (void);
 299
 300   /* If not NULL, target-specific routine to process monitor command.
 301      Returns 1 if handled, or 0 to perform default processing.  */
 302   int (*handle_monitor_command) (char *);
 303
 304   /* Returns the core given a thread, or -1 if not known.  */
 305   int (*core_of_thread) (ptid_t);
 306
 307   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 308   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 309                        unsigned char *myaddr, unsigned int len);
 310
 311   /* Target specific qSupported support.  FEATURES is an array of
 312      features with COUNT elements.  */
 313   void (*process_qsupported) (char **features, int count);
 314
 315   /* Return 1 if the target supports tracepoints, 0 (or leave the
 316      callback NULL) otherwise.  */
 317   int (*supports_tracepoints) (void);
 318
 319   /* Read PC from REGCACHE.  */
 320   CORE_ADDR (*read_pc) (struct regcache *regcache);
 321
 322   /* Write PC to REGCACHE.  */
 323   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 324
 325   /* Return true if THREAD is known to be stopped now.  */
 326   int (*thread_stopped) (struct thread_info *thread);
 327
 328   /* Read Thread Information Block address.  */
 329   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 330
 331   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 332      be ignored until an unpause_all call unfreezes threads again.
 333      There can be nested calls to pause_all, so a freeze counter
 334      should be maintained.  */
 335   void (*pause_all) (int freeze);
 336
 337   /* Unpause all threads.  Threads that hadn't been resumed by the
 338      client should be left stopped.  Basically a pause/unpause call
 339      pair should not end up resuming threads that were stopped before
 340      the pause call.  */
 341   void (*unpause_all) (int unfreeze);
 342
 343   /* Stabilize all threads.  That is, force them out of jump pads.  */
 344   void (*stabilize_threads) (void);
 345
 346   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 347      tracepoint internal object as used by the IPA agent.  TPADDR is
 348      the address of tracepoint.  COLLECTOR is address of the function
 349      the jump pad redirects to.  LOCKADDR is the address of the jump
 350      pad lock object.  ORIG_SIZE is the size in bytes of the
 351      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 352      jump pad entry, and on return holds the address past the end of
 353      the created jump pad.  If a trampoline is created by the function,
 354      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 355      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 356      buffer containing a copy of the instruction at TPADDR.
 357      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 358      return the address range where the instruction at TPADDR was relocated
 359      to.  If an error occurs, the ERR may be used to pass on an error
 360      message.  */
 361   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 362                                            CORE_ADDR collector,
 363                                            CORE_ADDR lockaddr,
 364                                            ULONGEST orig_size,
 365                                            CORE_ADDR *jump_entry,
 366                                            CORE_ADDR *trampoline,
 367                                            ULONGEST *trampoline_size,
 368                                            unsigned char *jjump_pad_insn,
 369                                            ULONGEST *jjump_pad_insn_size,
 370                                            CORE_ADDR *adjusted_insn_addr,
 371                                            CORE_ADDR *adjusted_insn_addr_end,
 372                                            char *err);
 373
 374   /* Return the bytecode operations vector for the current inferior.
 375      Returns NULL if bytecode compilation is not supported.  */
 376   struct emit_ops *(*emit_ops) (void);
 377
 378   /* Returns true if the target supports disabling randomization.  */
 379   int (*supports_disable_randomization) (void);
 380
 381   /* Return the minimum length of an instruction that can be safely overwritten
 382      for use as a fast tracepoint.  */
 383   int (*get_min_fast_tracepoint_insn_len) (void);
 384
 385   /* Read solib info on SVR4 platforms.  */
 386   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 387                                unsigned const char *writebuf,
 388                                CORE_ADDR offset, int len);
 389
 390   /* Return true if target supports debugging agent.  */
 391   int (*supports_agent) (void);
 392
 393   /* Check whether the target supports branch tracing.  */
 394   int (*supports_btrace) (struct target_ops *, enum btrace_format);
 395
 396   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 397      target information struct for reading and for disabling branch trace.  */
 398   struct btrace_target_info *(*enable_btrace)
 399     (ptid_t ptid, const struct btrace_config *conf);
 400
 401   /* Disable branch tracing.
 402      Returns zero on success, non-zero otherwise.  */
 403   int (*disable_btrace) (struct btrace_target_info *tinfo);
 404
 405   /* Read branch trace data into buffer.
 406      Return 0 on success; print an error message into BUFFER and return -1,
 407      otherwise.  */
 408   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 409                       enum btrace_read_type type);
 410
 411   /* Read the branch trace configuration into BUFFER.
 412      Return 0 on success; print an error message into BUFFER and return -1
 413      otherwise.  */
 414   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 415
 416   /* Return true if target supports range stepping.  */
 417   int (*supports_range_stepping) (void);
 418
 419   /* Return the full absolute name of the executable file that was
 420      run to create the process PID.  If the executable file cannot
 421      be determined, NULL is returned.  Otherwise, a pointer to a
 422      character string containing the pathname is returned.  This
 423      string should be copied into a buffer by the client if the string
 424      will not be immediately used, or if it must persist.  */
 425   char *(*pid_to_exec_file) (int pid);
 426
 427   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 428      the filesystem as it appears to process PID.  Systems where all
 429      processes share a common filesystem should set this to NULL.
 430      If NULL, the caller should fall back to open(2).  */
 431   int (*multifs_open) (int pid, const char *filename,
 432                        int flags, mode_t mode);
 433
 434   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 435      in the filesystem as it appears to process PID.  Systems where
 436      all processes share a common filesystem should set this to NULL.
 437      If NULL, the caller should fall back to unlink(2).  */
 438   int (*multifs_unlink) (int pid, const char *filename);
 439
 440   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 441      operating in the filesystem as it appears to process PID.
 442      Systems where all processes share a common filesystem should
 443      set this to NULL.  If NULL, the caller should fall back to
 444      readlink(2).  */
 445   ssize_t (*multifs_readlink) (int pid, const char *filename,
 446                                char *buf, size_t bufsiz);
 447
 448   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 449      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 450      ARM) was present in the PC.  */
 451   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 452
 453   /* Return the software breakpoint from KIND.  KIND can have target
 454      specific meaning like the Z0 kind parameter.
 455      SIZE is set to the software breakpoint's length in memory.  */
 456   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 457
 458   /* Return the thread's name, or NULL if the target is unable to determine it.
 459      The returned value must not be freed by the caller.  */
 460   const char *(*thread_name) (ptid_t thread);
 461
 462   /* Return the breakpoint kind for this target based on the current
 463      processor state (e.g. the current instruction mode on ARM) and the
 464      PC.  The PCPTR is adjusted to the real memory location in case a flag
 465      (e.g., the Thumb bit on ARM) is present in the PC.  */
 466   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 467
 468   /* Returns true if the target can software single step.  */
 469   int (*supports_software_single_step) (void);
 470 };
 471
 472 extern struct target_ops *the_target;
 473
 474 void set_target_ops (struct target_ops *);
 475
 476 #define create_inferior(program, args) \
 477   (*the_target->create_inferior) (program, args)
 478
 479 #define target_post_create_inferior()                    \
 480   do                                                     \
 481     {                                                    \
 482       if (the_target->post_create_inferior != NULL)      \
 483         (*the_target->post_create_inferior) ();          \
 484     } while (0)
 485
 486 #define myattach(pid) \
 487   (*the_target->attach) (pid)
 488
 489 int kill_inferior (int);
 490
 491 #define target_supports_fork_events() \
 492   (the_target->supports_fork_events ? \
 493    (*the_target->supports_fork_events) () : 0)
 494
 495 #define target_supports_vfork_events() \
 496   (the_target->supports_vfork_events ? \
 497    (*the_target->supports_vfork_events) () : 0)
 498
 499 #define target_supports_exec_events() \
 500   (the_target->supports_exec_events ? \
 501    (*the_target->supports_exec_events) () : 0)
 502
 503 #define target_handle_new_gdb_connection()               \
 504   do                                                     \
 505     {                                                    \
 506       if (the_target->handle_new_gdb_connection != NULL) \
 507         (*the_target->handle_new_gdb_connection) ();     \
 508     } while (0)
 509
 510 #define detach_inferior(pid) \
 511   (*the_target->detach) (pid)
 512
 513 #define mourn_inferior(PROC) \
 514   (*the_target->mourn) (PROC)
 515
 516 #define mythread_alive(pid) \
 517   (*the_target->thread_alive) (pid)
 518
 519 #define fetch_inferior_registers(regcache, regno)       \
 520   (*the_target->fetch_registers) (regcache, regno)
 521
 522 #define store_inferior_registers(regcache, regno) \
 523   (*the_target->store_registers) (regcache, regno)
 524
 525 #define join_inferior(pid) \
 526   (*the_target->join) (pid)
 527
 528 #define target_supports_non_stop() \
 529   (the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
 530
 531 #define target_async(enable) \
 532   (the_target->async ? (*the_target->async) (enable) : 0)
 533
 534 #define target_supports_multi_process() \
 535   (the_target->supports_multi_process ? \
 536    (*the_target->supports_multi_process) () : 0)
 537
 538 #define target_process_qsupported(features, count)      \
 539   do                                                    \
 540     {                                                   \
 541       if (the_target->process_qsupported)               \
 542         the_target->process_qsupported (features, count); \
 543     } while (0)
 544
 545 #define target_supports_tracepoints()                   \
 546   (the_target->supports_tracepoints                     \
 547    ? (*the_target->supports_tracepoints) () : 0)
 548
 549 #define target_supports_fast_tracepoints()              \
 550   (the_target->install_fast_tracepoint_jump_pad != NULL)
 551
 552 #define target_get_min_fast_tracepoint_insn_len()       \
 553   (the_target->get_min_fast_tracepoint_insn_len         \
 554    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 555
 556 #define thread_stopped(thread) \
 557   (*the_target->thread_stopped) (thread)
 558
 559 #define pause_all(freeze)                       \
 560   do                                            \
 561     {                                           \
 562       if (the_target->pause_all)                \
 563         (*the_target->pause_all) (freeze);      \
 564     } while (0)
 565
 566 #define unpause_all(unfreeze)                   \
 567   do                                            \
 568     {                                           \
 569       if (the_target->unpause_all)              \
 570         (*the_target->unpause_all) (unfreeze);  \
 571     } while (0)
 572
 573 #define stabilize_threads()                     \
 574   do                                            \
 575     {                                           \
 576       if (the_target->stabilize_threads)        \
 577         (*the_target->stabilize_threads) ();    \
 578     } while (0)
 579
 580 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 581                                          collector, lockaddr,           \
 582                                          orig_size,                     \
 583                                          jump_entry,                    \
 584                                          trampoline, trampoline_size,   \
 585                                          jjump_pad_insn,                \
 586                                          jjump_pad_insn_size,           \
 587                                          adjusted_insn_addr,            \
 588                                          adjusted_insn_addr_end,        \
 589                                          err)                           \
 590   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 591                                                    collector,lockaddr,  \
 592                                                    orig_size, jump_entry, \
 593                                                    trampoline,          \
 594                                                    trampoline_size,     \
 595                                                    jjump_pad_insn,      \
 596                                                    jjump_pad_insn_size, \
 597                                                    adjusted_insn_addr,  \
 598                                                    adjusted_insn_addr_end, \
 599                                                    err)
 600
 601 #define target_emit_ops() \
 602   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 603
 604 #define target_supports_disable_randomization() \
 605   (the_target->supports_disable_randomization ? \
 606    (*the_target->supports_disable_randomization) () : 0)
 607
 608 #define target_supports_agent() \
 609   (the_target->supports_agent ? \
 610    (*the_target->supports_agent) () : 0)
 611
 612 #define target_supports_btrace(format)                  \
 613   (the_target->supports_btrace                          \
 614    ? (*the_target->supports_btrace) (the_target, format) : 0)
 615
 616 #define target_enable_btrace(ptid, conf) \
 617   (*the_target->enable_btrace) (ptid, conf)
 618
 619 #define target_disable_btrace(tinfo) \
 620   (*the_target->disable_btrace) (tinfo)
 621
 622 #define target_read_btrace(tinfo, buffer, type) \
 623   (*the_target->read_btrace) (tinfo, buffer, type)
 624
 625 #define target_read_btrace_conf(tinfo, buffer)  \
 626   (*the_target->read_btrace_conf) (tinfo, buffer)
 627
 628 #define target_supports_range_stepping() \
 629   (the_target->supports_range_stepping ? \
 630    (*the_target->supports_range_stepping) () : 0)
 631
 632 #define target_supports_stopped_by_sw_breakpoint() \
 633   (the_target->supports_stopped_by_sw_breakpoint ? \
 634    (*the_target->supports_stopped_by_sw_breakpoint) () : 0)
 635
 636 #define target_stopped_by_sw_breakpoint() \
 637   (the_target->stopped_by_sw_breakpoint ? \
 638    (*the_target->stopped_by_sw_breakpoint) () : 0)
 639
 640 #define target_supports_stopped_by_hw_breakpoint() \
 641   (the_target->supports_stopped_by_hw_breakpoint ? \
 642    (*the_target->supports_stopped_by_hw_breakpoint) () : 0)
 643
 644 #define target_supports_hardware_single_step() \
 645   (the_target->supports_hardware_single_step ? \
 646    (*the_target->supports_hardware_single_step) () : 0)
 647
 648 #define target_stopped_by_hw_breakpoint() \
 649   (the_target->stopped_by_hw_breakpoint ? \
 650    (*the_target->stopped_by_hw_breakpoint) () : 0)
 651
 652 #define target_breakpoint_kind_from_pc(pcptr) \
 653   (the_target->breakpoint_kind_from_pc \
 654    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 655    : default_breakpoint_kind_from_pc (pcptr))
 656
 657 #define target_breakpoint_kind_from_current_state(pcptr) \
 658   (the_target->breakpoint_kind_from_current_state \
 659    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 660    : target_breakpoint_kind_from_pc (pcptr))
 661
 662 #define target_supports_software_single_step() \
 663   (the_target->supports_software_single_step ? \
 664    (*the_target->supports_software_single_step) () : 0)
 665
 666 /* Start non-stop mode, returns 0 on success, -1 on failure.   */
 667
 668 int start_non_stop (int nonstop);
 669
 670 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 671                int connected_wait);
 672
 673 /* Prepare to read or write memory from the inferior process.  See the
 674    corresponding target_ops methods for more details.  */
 675
 676 int prepare_to_access_memory (void);
 677 void done_accessing_memory (void);
 678
 679 #define target_core_of_thread(ptid)             \
 680   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 681    : -1)
 682
 683 #define target_thread_name(ptid)                                \
 684   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 685    : NULL)
 686
 687 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 688
 689 int write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 690                            int len);
 691
 692 int set_desired_thread (int id);
 693
 694 const char *target_pid_to_str (ptid_t);
 695
 696 int target_can_do_hardware_single_step (void);
 697
 698 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 699
 700 #endif /* TARGET_H */