gdb/gdbserver/target.h

   1 /* Target operations for the remote server for GDB.
   2    Copyright (C) 2002-2017 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 #include <vector>
  32
  33 struct emit_ops;
  34 struct buffer;
  35 struct process_info;
  36
  37 /* This structure describes how to resume a particular thread (or all
  38    threads) based on the client's request.  If thread is -1, then this
  39    entry applies to all threads.  These are passed around as an
  40    array.  */
  41
  42 struct thread_resume
  43 {
  44   ptid_t thread;
  45
  46   /* How to "resume".  */
  47   enum resume_kind kind;
  48
  49   /* If non-zero, send this signal when we resume, or to stop the
  50      thread.  If stopping a thread, and this is 0, the target should
  51      stop the thread however it best decides to (e.g., SIGSTOP on
  52      linux; SuspendThread on win32).  This is a host signal value (not
  53      enum gdb_signal).  */
  54   int sig;
  55
  56   /* Range to single step within.  Valid only iff KIND is resume_step.
  57
  58      Single-step once, and then continuing stepping as long as the
  59      thread stops in this range.  (If the range is empty
  60      [STEP_RANGE_START == STEP_RANGE_END], then this is a single-step
  61      request.)  */
  62   CORE_ADDR step_range_start;   /* Inclusive */
  63   CORE_ADDR step_range_end;     /* Exclusive */
  64 };
  65
  66 struct target_ops
  67 {
  68   /* Start a new process.
  69
  70      PROGRAM is a path to the program to execute.
  71      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
  72      to be passed to the inferior as ``argv'' (along with PROGRAM).
  73
  74      Returns the new PID on success, -1 on failure.  Registers the new
  75      process with the process list.  */
  76   int (*create_inferior) (const char *program,
  77                           const std::vector<char *> &program_args);
  78
  79   /* Do additional setup after a new process is created, including
  80      exec-wrapper completion.  */
  81   void (*post_create_inferior) (void);
  82
  83   /* Attach to a running process.
  84
  85      PID is the process ID to attach to, specified by the user
  86      or a higher layer.
  87
  88      Returns -1 if attaching is unsupported, 0 on success, and calls
  89      error() otherwise.  */
  90
  91   int (*attach) (unsigned long pid);
  92
  93   /* Kill inferior PID.  Return -1 on failure, and 0 on success.  */
  94
  95   int (*kill) (int pid);
  96
  97   /* Detach from inferior PID. Return -1 on failure, and 0 on
  98      success.  */
  99
 100   int (*detach) (int pid);
 101
 102   /* The inferior process has died.  Do what is right.  */
 103
 104   void (*mourn) (struct process_info *proc);
 105
 106   /* Wait for inferior PID to exit.  */
 107   void (*join) (int pid);
 108
 109   /* Return 1 iff the thread with process ID PID is alive.  */
 110
 111   int (*thread_alive) (ptid_t pid);
 112
 113   /* Resume the inferior process.  */
 114
 115   void (*resume) (struct thread_resume *resume_info, size_t n);
 116
 117   /* Wait for the inferior process or thread to change state.  Store
 118      status through argument pointer STATUS.
 119
 120      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 121      wait for any thread of process pid to do something.  Return ptid
 122      of child, or -1 in case of error; store status through argument
 123      pointer STATUS.  OPTIONS is a bit set of options defined as
 124      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 125      no child stop to report, return is
 126      null_ptid/TARGET_WAITKIND_IGNORE.  */
 127
 128   ptid_t (*wait) (ptid_t ptid, struct target_waitstatus *status, int options);
 129
 130   /* Fetch registers from the inferior process.
 131
 132      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 133
 134   void (*fetch_registers) (struct regcache *regcache, int regno);
 135
 136   /* Store registers to the inferior process.
 137
 138      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 139
 140   void (*store_registers) (struct regcache *regcache, int regno);
 141
 142   /* Prepare to read or write memory from the inferior process.
 143      Targets use this to do what is necessary to get the state of the
 144      inferior such that it is possible to access memory.
 145
 146      This should generally only be called from client facing routines,
 147      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 148      insertion routine.
 149
 150      Like `read_memory' and `write_memory' below, returns 0 on success
 151      and errno on failure.  */
 152
 153   int (*prepare_to_access_memory) (void);
 154
 155   /* Undo the effects of prepare_to_access_memory.  */
 156
 157   void (*done_accessing_memory) (void);
 158
 159   /* Read memory from the inferior process.  This should generally be
 160      called through read_inferior_memory, which handles breakpoint shadowing.
 161
 162      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 163
 164      Returns 0 on success and errno on failure.  */
 165
 166   int (*read_memory) (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 167
 168   /* Write memory to the inferior process.  This should generally be
 169      called through write_inferior_memory, which handles breakpoint shadowing.
 170
 171      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 172
 173      Returns 0 on success and errno on failure.  */
 174
 175   int (*write_memory) (CORE_ADDR memaddr, const unsigned char *myaddr,
 176                        int len);
 177
 178   /* Query GDB for the values of any symbols we're interested in.
 179      This function is called whenever we receive a "qSymbols::"
 180      query, which corresponds to every time more symbols (might)
 181      become available.  NULL if we aren't interested in any
 182      symbols.  */
 183
 184   void (*look_up_symbols) (void);
 185
 186   /* Send an interrupt request to the inferior process,
 187      however is appropriate.  */
 188
 189   void (*request_interrupt) (void);
 190
 191   /* Read auxiliary vector data from the inferior process.
 192
 193      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 194
 195   int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
 196                     unsigned int len);
 197
 198   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 199      otherwise.  The type is coded as follows:
 200        '0' - software-breakpoint
 201        '1' - hardware-breakpoint
 202        '2' - write watchpoint
 203        '3' - read watchpoint
 204        '4' - access watchpoint
 205   */
 206   int (*supports_z_point_type) (char z_type);
 207
 208   /* Insert and remove a break or watchpoint.
 209      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 210
 211   int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 212                        int size, struct raw_breakpoint *bp);
 213   int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 214                        int size, struct raw_breakpoint *bp);
 215
 216   /* Returns 1 if the target stopped because it executed a software
 217      breakpoint instruction, 0 otherwise.  */
 218   int (*stopped_by_sw_breakpoint) (void);
 219
 220   /* Returns true if the target knows whether a trap was caused by a
 221      SW breakpoint triggering.  */
 222   int (*supports_stopped_by_sw_breakpoint) (void);
 223
 224   /* Returns 1 if the target stopped for a hardware breakpoint.  */
 225   int (*stopped_by_hw_breakpoint) (void);
 226
 227   /* Returns true if the target knows whether a trap was caused by a
 228      HW breakpoint triggering.  */
 229   int (*supports_stopped_by_hw_breakpoint) (void);
 230
 231   /* Returns true if the target can do hardware single step.  */
 232   int (*supports_hardware_single_step) (void);
 233
 234   /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise.  */
 235
 236   int (*stopped_by_watchpoint) (void);
 237
 238   /* Returns the address associated with the watchpoint that hit, if any;
 239      returns 0 otherwise.  */
 240
 241   CORE_ADDR (*stopped_data_address) (void);
 242
 243   /* Reports the text, data offsets of the executable.  This is
 244      needed for uclinux where the executable is relocated during load
 245      time.  */
 246
 247   int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
 248
 249   /* Fetch the address associated with a specific thread local storage
 250      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 251      Stores it in *ADDRESS and returns zero on success; otherwise returns
 252      an error code.  A return value of -1 means this system does not
 253      support the operation.  */
 254
 255   int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
 256                           CORE_ADDR load_module, CORE_ADDR *address);
 257
 258    /* Read/Write from/to spufs using qXfer packets.  */
 259   int (*qxfer_spu) (const char *annex, unsigned char *readbuf,
 260                     unsigned const char *writebuf, CORE_ADDR offset, int len);
 261
 262   /* Fill BUF with an hostio error packet representing the last hostio
 263      error.  */
 264   void (*hostio_last_error) (char *buf);
 265
 266   /* Read/Write OS data using qXfer packets.  */
 267   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
 268                        unsigned const char *writebuf, CORE_ADDR offset,
 269                        int len);
 270
 271   /* Read/Write extra signal info.  */
 272   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
 273                         unsigned const char *writebuf,
 274                         CORE_ADDR offset, int len);
 275
 276   int (*supports_non_stop) (void);
 277
 278   /* Enables async target events.  Returns the previous enable
 279      state.  */
 280   int (*async) (int enable);
 281
 282   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
 283      success, -1 otherwise.  */
 284   int (*start_non_stop) (int);
 285
 286   /* Returns true if the target supports multi-process debugging.  */
 287   int (*supports_multi_process) (void);
 288
 289   /* Returns true if fork events are supported.  */
 290   int (*supports_fork_events) (void);
 291
 292   /* Returns true if vfork events are supported.  */
 293   int (*supports_vfork_events) (void);
 294
 295   /* Returns true if exec events are supported.  */
 296   int (*supports_exec_events) (void);
 297
 298   /* Allows target to re-initialize connection-specific settings.  */
 299   void (*handle_new_gdb_connection) (void);
 300
 301   /* If not NULL, target-specific routine to process monitor command.
 302      Returns 1 if handled, or 0 to perform default processing.  */
 303   int (*handle_monitor_command) (char *);
 304
 305   /* Returns the core given a thread, or -1 if not known.  */
 306   int (*core_of_thread) (ptid_t);
 307
 308   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 309   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 310                        unsigned char *myaddr, unsigned int len);
 311
 312   /* Target specific qSupported support.  FEATURES is an array of
 313      features with COUNT elements.  */
 314   void (*process_qsupported) (char **features, int count);
 315
 316   /* Return 1 if the target supports tracepoints, 0 (or leave the
 317      callback NULL) otherwise.  */
 318   int (*supports_tracepoints) (void);
 319
 320   /* Read PC from REGCACHE.  */
 321   CORE_ADDR (*read_pc) (struct regcache *regcache);
 322
 323   /* Write PC to REGCACHE.  */
 324   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 325
 326   /* Return true if THREAD is known to be stopped now.  */
 327   int (*thread_stopped) (struct thread_info *thread);
 328
 329   /* Read Thread Information Block address.  */
 330   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 331
 332   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 333      be ignored until an unpause_all call unfreezes threads again.
 334      There can be nested calls to pause_all, so a freeze counter
 335      should be maintained.  */
 336   void (*pause_all) (int freeze);
 337
 338   /* Unpause all threads.  Threads that hadn't been resumed by the
 339      client should be left stopped.  Basically a pause/unpause call
 340      pair should not end up resuming threads that were stopped before
 341      the pause call.  */
 342   void (*unpause_all) (int unfreeze);
 343
 344   /* Stabilize all threads.  That is, force them out of jump pads.  */
 345   void (*stabilize_threads) (void);
 346
 347   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 348      tracepoint internal object as used by the IPA agent.  TPADDR is
 349      the address of tracepoint.  COLLECTOR is address of the function
 350      the jump pad redirects to.  LOCKADDR is the address of the jump
 351      pad lock object.  ORIG_SIZE is the size in bytes of the
 352      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 353      jump pad entry, and on return holds the address past the end of
 354      the created jump pad.  If a trampoline is created by the function,
 355      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 356      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 357      buffer containing a copy of the instruction at TPADDR.
 358      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 359      return the address range where the instruction at TPADDR was relocated
 360      to.  If an error occurs, the ERR may be used to pass on an error
 361      message.  */
 362   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 363                                            CORE_ADDR collector,
 364                                            CORE_ADDR lockaddr,
 365                                            ULONGEST orig_size,
 366                                            CORE_ADDR *jump_entry,
 367                                            CORE_ADDR *trampoline,
 368                                            ULONGEST *trampoline_size,
 369                                            unsigned char *jjump_pad_insn,
 370                                            ULONGEST *jjump_pad_insn_size,
 371                                            CORE_ADDR *adjusted_insn_addr,
 372                                            CORE_ADDR *adjusted_insn_addr_end,
 373                                            char *err);
 374
 375   /* Return the bytecode operations vector for the current inferior.
 376      Returns NULL if bytecode compilation is not supported.  */
 377   struct emit_ops *(*emit_ops) (void);
 378
 379   /* Returns true if the target supports disabling randomization.  */
 380   int (*supports_disable_randomization) (void);
 381
 382   /* Return the minimum length of an instruction that can be safely overwritten
 383      for use as a fast tracepoint.  */
 384   int (*get_min_fast_tracepoint_insn_len) (void);
 385
 386   /* Read solib info on SVR4 platforms.  */
 387   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 388                                unsigned const char *writebuf,
 389                                CORE_ADDR offset, int len);
 390
 391   /* Return true if target supports debugging agent.  */
 392   int (*supports_agent) (void);
 393
 394   /* Check whether the target supports branch tracing.  */
 395   int (*supports_btrace) (struct target_ops *, enum btrace_format);
 396
 397   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 398      target information struct for reading and for disabling branch trace.  */
 399   struct btrace_target_info *(*enable_btrace)
 400     (ptid_t ptid, const struct btrace_config *conf);
 401
 402   /* Disable branch tracing.
 403      Returns zero on success, non-zero otherwise.  */
 404   int (*disable_btrace) (struct btrace_target_info *tinfo);
 405
 406   /* Read branch trace data into buffer.
 407      Return 0 on success; print an error message into BUFFER and return -1,
 408      otherwise.  */
 409   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 410                       enum btrace_read_type type);
 411
 412   /* Read the branch trace configuration into BUFFER.
 413      Return 0 on success; print an error message into BUFFER and return -1
 414      otherwise.  */
 415   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 416
 417   /* Return true if target supports range stepping.  */
 418   int (*supports_range_stepping) (void);
 419
 420   /* Return the full absolute name of the executable file that was
 421      run to create the process PID.  If the executable file cannot
 422      be determined, NULL is returned.  Otherwise, a pointer to a
 423      character string containing the pathname is returned.  This
 424      string should be copied into a buffer by the client if the string
 425      will not be immediately used, or if it must persist.  */
 426   char *(*pid_to_exec_file) (int pid);
 427
 428   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 429      the filesystem as it appears to process PID.  Systems where all
 430      processes share a common filesystem should set this to NULL.
 431      If NULL, the caller should fall back to open(2).  */
 432   int (*multifs_open) (int pid, const char *filename,
 433                        int flags, mode_t mode);
 434
 435   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 436      in the filesystem as it appears to process PID.  Systems where
 437      all processes share a common filesystem should set this to NULL.
 438      If NULL, the caller should fall back to unlink(2).  */
 439   int (*multifs_unlink) (int pid, const char *filename);
 440
 441   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 442      operating in the filesystem as it appears to process PID.
 443      Systems where all processes share a common filesystem should
 444      set this to NULL.  If NULL, the caller should fall back to
 445      readlink(2).  */
 446   ssize_t (*multifs_readlink) (int pid, const char *filename,
 447                                char *buf, size_t bufsiz);
 448
 449   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 450      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 451      ARM) was present in the PC.  */
 452   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 453
 454   /* Return the software breakpoint from KIND.  KIND can have target
 455      specific meaning like the Z0 kind parameter.
 456      SIZE is set to the software breakpoint's length in memory.  */
 457   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 458
 459   /* Return the thread's name, or NULL if the target is unable to determine it.
 460      The returned value must not be freed by the caller.  */
 461   const char *(*thread_name) (ptid_t thread);
 462
 463   /* Return the breakpoint kind for this target based on the current
 464      processor state (e.g. the current instruction mode on ARM) and the
 465      PC.  The PCPTR is adjusted to the real memory location in case a flag
 466      (e.g., the Thumb bit on ARM) is present in the PC.  */
 467   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 468
 469   /* Returns true if the target can software single step.  */
 470   int (*supports_software_single_step) (void);
 471
 472   /* Return 1 if the target supports catch syscall, 0 (or leave the
 473      callback NULL) otherwise.  */
 474   int (*supports_catch_syscall) (void);
 475
 476   /* Return tdesc index for IPA.  */
 477   int (*get_ipa_tdesc_idx) (void);
 478 };
 479
 480 extern struct target_ops *the_target;
 481
 482 void set_target_ops (struct target_ops *);
 483
 484 #define create_inferior(program, program_args)  \
 485   (*the_target->create_inferior) (program, program_args)
 486
 487 #define target_post_create_inferior()                    \
 488   do                                                     \
 489     {                                                    \
 490       if (the_target->post_create_inferior != NULL)      \
 491         (*the_target->post_create_inferior) ();          \
 492     } while (0)
 493
 494 #define myattach(pid) \
 495   (*the_target->attach) (pid)
 496
 497 int kill_inferior (int);
 498
 499 #define target_supports_fork_events() \
 500   (the_target->supports_fork_events ? \
 501    (*the_target->supports_fork_events) () : 0)
 502
 503 #define target_supports_vfork_events() \
 504   (the_target->supports_vfork_events ? \
 505    (*the_target->supports_vfork_events) () : 0)
 506
 507 #define target_supports_exec_events() \
 508   (the_target->supports_exec_events ? \
 509    (*the_target->supports_exec_events) () : 0)
 510
 511 #define target_handle_new_gdb_connection()               \
 512   do                                                     \
 513     {                                                    \
 514       if (the_target->handle_new_gdb_connection != NULL) \
 515         (*the_target->handle_new_gdb_connection) ();     \
 516     } while (0)
 517
 518 #define detach_inferior(pid) \
 519   (*the_target->detach) (pid)
 520
 521 #define mythread_alive(pid) \
 522   (*the_target->thread_alive) (pid)
 523
 524 #define fetch_inferior_registers(regcache, regno)       \
 525   (*the_target->fetch_registers) (regcache, regno)
 526
 527 #define store_inferior_registers(regcache, regno) \
 528   (*the_target->store_registers) (regcache, regno)
 529
 530 #define join_inferior(pid) \
 531   (*the_target->join) (pid)
 532
 533 #define target_supports_non_stop() \
 534   (the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
 535
 536 #define target_async(enable) \
 537   (the_target->async ? (*the_target->async) (enable) : 0)
 538
 539 #define target_process_qsupported(features, count)      \
 540   do                                                    \
 541     {                                                   \
 542       if (the_target->process_qsupported)               \
 543         the_target->process_qsupported (features, count); \
 544     } while (0)
 545
 546 #define target_supports_catch_syscall()                 \
 547   (the_target->supports_catch_syscall ?                 \
 548    (*the_target->supports_catch_syscall) () : 0)
 549
 550 #define target_get_ipa_tdesc_idx()                      \
 551   (the_target->get_ipa_tdesc_idx                        \
 552    ? (*the_target->get_ipa_tdesc_idx) () : 0)
 553
 554 #define target_supports_tracepoints()                   \
 555   (the_target->supports_tracepoints                     \
 556    ? (*the_target->supports_tracepoints) () : 0)
 557
 558 #define target_supports_fast_tracepoints()              \
 559   (the_target->install_fast_tracepoint_jump_pad != NULL)
 560
 561 #define target_get_min_fast_tracepoint_insn_len()       \
 562   (the_target->get_min_fast_tracepoint_insn_len         \
 563    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 564
 565 #define thread_stopped(thread) \
 566   (*the_target->thread_stopped) (thread)
 567
 568 #define pause_all(freeze)                       \
 569   do                                            \
 570     {                                           \
 571       if (the_target->pause_all)                \
 572         (*the_target->pause_all) (freeze);      \
 573     } while (0)
 574
 575 #define unpause_all(unfreeze)                   \
 576   do                                            \
 577     {                                           \
 578       if (the_target->unpause_all)              \
 579         (*the_target->unpause_all) (unfreeze);  \
 580     } while (0)
 581
 582 #define stabilize_threads()                     \
 583   do                                            \
 584     {                                           \
 585       if (the_target->stabilize_threads)        \
 586         (*the_target->stabilize_threads) ();    \
 587     } while (0)
 588
 589 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 590                                          collector, lockaddr,           \
 591                                          orig_size,                     \
 592                                          jump_entry,                    \
 593                                          trampoline, trampoline_size,   \
 594                                          jjump_pad_insn,                \
 595                                          jjump_pad_insn_size,           \
 596                                          adjusted_insn_addr,            \
 597                                          adjusted_insn_addr_end,        \
 598                                          err)                           \
 599   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 600                                                    collector,lockaddr,  \
 601                                                    orig_size, jump_entry, \
 602                                                    trampoline,          \
 603                                                    trampoline_size,     \
 604                                                    jjump_pad_insn,      \
 605                                                    jjump_pad_insn_size, \
 606                                                    adjusted_insn_addr,  \
 607                                                    adjusted_insn_addr_end, \
 608                                                    err)
 609
 610 #define target_emit_ops() \
 611   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 612
 613 #define target_supports_disable_randomization() \
 614   (the_target->supports_disable_randomization ? \
 615    (*the_target->supports_disable_randomization) () : 0)
 616
 617 #define target_supports_agent() \
 618   (the_target->supports_agent ? \
 619    (*the_target->supports_agent) () : 0)
 620
 621 #define target_supports_btrace(format)                  \
 622   (the_target->supports_btrace                          \
 623    ? (*the_target->supports_btrace) (the_target, format) : 0)
 624
 625 #define target_enable_btrace(ptid, conf) \
 626   (*the_target->enable_btrace) (ptid, conf)
 627
 628 #define target_disable_btrace(tinfo) \
 629   (*the_target->disable_btrace) (tinfo)
 630
 631 #define target_read_btrace(tinfo, buffer, type) \
 632   (*the_target->read_btrace) (tinfo, buffer, type)
 633
 634 #define target_read_btrace_conf(tinfo, buffer)  \
 635   (*the_target->read_btrace_conf) (tinfo, buffer)
 636
 637 #define target_supports_range_stepping() \
 638   (the_target->supports_range_stepping ? \
 639    (*the_target->supports_range_stepping) () : 0)
 640
 641 #define target_supports_stopped_by_sw_breakpoint() \
 642   (the_target->supports_stopped_by_sw_breakpoint ? \
 643    (*the_target->supports_stopped_by_sw_breakpoint) () : 0)
 644
 645 #define target_stopped_by_sw_breakpoint() \
 646   (the_target->stopped_by_sw_breakpoint ? \
 647    (*the_target->stopped_by_sw_breakpoint) () : 0)
 648
 649 #define target_supports_stopped_by_hw_breakpoint() \
 650   (the_target->supports_stopped_by_hw_breakpoint ? \
 651    (*the_target->supports_stopped_by_hw_breakpoint) () : 0)
 652
 653 #define target_supports_hardware_single_step() \
 654   (the_target->supports_hardware_single_step ? \
 655    (*the_target->supports_hardware_single_step) () : 0)
 656
 657 #define target_stopped_by_hw_breakpoint() \
 658   (the_target->stopped_by_hw_breakpoint ? \
 659    (*the_target->stopped_by_hw_breakpoint) () : 0)
 660
 661 #define target_breakpoint_kind_from_pc(pcptr) \
 662   (the_target->breakpoint_kind_from_pc \
 663    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 664    : default_breakpoint_kind_from_pc (pcptr))
 665
 666 #define target_breakpoint_kind_from_current_state(pcptr) \
 667   (the_target->breakpoint_kind_from_current_state \
 668    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 669    : target_breakpoint_kind_from_pc (pcptr))
 670
 671 #define target_supports_software_single_step() \
 672   (the_target->supports_software_single_step ? \
 673    (*the_target->supports_software_single_step) () : 0)
 674
 675 /* Start non-stop mode, returns 0 on success, -1 on failure.   */
 676
 677 int start_non_stop (int nonstop);
 678
 679 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 680                int connected_wait);
 681
 682 /* Prepare to read or write memory from the inferior process.  See the
 683    corresponding target_ops methods for more details.  */
 684
 685 int prepare_to_access_memory (void);
 686 void done_accessing_memory (void);
 687
 688 #define target_core_of_thread(ptid)             \
 689   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 690    : -1)
 691
 692 #define target_thread_name(ptid)                                \
 693   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 694    : NULL)
 695
 696 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 697
 698 int write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 699                            int len);
 700
 701 int set_desired_thread ();
 702
 703 const char *target_pid_to_str (ptid_t);
 704
 705 int target_can_do_hardware_single_step (void);
 706
 707 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 708
 709 #endif /* TARGET_H */