gdb/gdbserver/target.h

   1 /* Target operations for the remote server for GDB.
   2    Copyright (C) 2002-2020 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 GDBSERVER_TARGET_H
  22 #define GDBSERVER_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 "gdbsupport/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 process PROC.  Return -1 on failure, and 0 on success.  */
  94
  95   int (*kill) (process_info *proc);
  96
  97   /* Detach from process PROC.  Return -1 on failure, and 0 on
  98      success.  */
  99
 100   int (*detach) (process_info *proc);
 101
 102   /* The inferior process has died.  Do what is right.  */
 103
 104   void (*mourn) (struct process_info *proc);
 105
 106   /* Wait for process PID to exit.  */
 107
 108   void (*join) (int pid);
 109
 110   /* Return 1 iff the thread with process ID PID is alive.  */
 111
 112   int (*thread_alive) (ptid_t pid);
 113
 114   /* Resume the inferior process.  */
 115
 116   void (*resume) (struct thread_resume *resume_info, size_t n);
 117
 118   /* Wait for the inferior process or thread to change state.  Store
 119      status through argument pointer STATUS.
 120
 121      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 122      wait for any thread of process pid to do something.  Return ptid
 123      of child, or -1 in case of error; store status through argument
 124      pointer STATUS.  OPTIONS is a bit set of options defined as
 125      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 126      no child stop to report, return is
 127      null_ptid/TARGET_WAITKIND_IGNORE.  */
 128
 129   ptid_t (*wait) (ptid_t ptid, struct target_waitstatus *status, int options);
 130
 131   /* Fetch registers from the inferior process.
 132
 133      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 134
 135   void (*fetch_registers) (struct regcache *regcache, int regno);
 136
 137   /* Store registers to the inferior process.
 138
 139      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 140
 141   void (*store_registers) (struct regcache *regcache, int regno);
 142
 143   /* Prepare to read or write memory from the inferior process.
 144      Targets use this to do what is necessary to get the state of the
 145      inferior such that it is possible to access memory.
 146
 147      This should generally only be called from client facing routines,
 148      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 149      insertion routine.
 150
 151      Like `read_memory' and `write_memory' below, returns 0 on success
 152      and errno on failure.  */
 153
 154   int (*prepare_to_access_memory) (void);
 155
 156   /* Undo the effects of prepare_to_access_memory.  */
 157
 158   void (*done_accessing_memory) (void);
 159
 160   /* Read memory from the inferior process.  This should generally be
 161      called through read_inferior_memory, which handles breakpoint shadowing.
 162
 163      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 164
 165      Returns 0 on success and errno on failure.  */
 166
 167   int (*read_memory) (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 168
 169   /* Write memory to the inferior process.  This should generally be
 170      called through target_write_memory, which handles breakpoint shadowing.
 171
 172      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 173
 174      Returns 0 on success and errno on failure.  */
 175
 176   int (*write_memory) (CORE_ADDR memaddr, const unsigned char *myaddr,
 177                        int len);
 178
 179   /* Query GDB for the values of any symbols we're interested in.
 180      This function is called whenever we receive a "qSymbols::"
 181      query, which corresponds to every time more symbols (might)
 182      become available.  NULL if we aren't interested in any
 183      symbols.  */
 184
 185   void (*look_up_symbols) (void);
 186
 187   /* Send an interrupt request to the inferior process,
 188      however is appropriate.  */
 189
 190   void (*request_interrupt) (void);
 191
 192   /* Read auxiliary vector data from the inferior process.
 193
 194      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 195
 196   int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
 197                     unsigned int len);
 198
 199   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 200      otherwise.  The type is coded as follows:
 201        '0' - software-breakpoint
 202        '1' - hardware-breakpoint
 203        '2' - write watchpoint
 204        '3' - read watchpoint
 205        '4' - access watchpoint
 206   */
 207   int (*supports_z_point_type) (char z_type);
 208
 209   /* Insert and remove a break or watchpoint.
 210      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 211
 212   int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 213                        int size, struct raw_breakpoint *bp);
 214   int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 215                        int size, struct raw_breakpoint *bp);
 216
 217   /* Returns 1 if the target stopped because it executed a software
 218      breakpoint instruction, 0 otherwise.  */
 219   int (*stopped_by_sw_breakpoint) (void);
 220
 221   /* Returns true if the target knows whether a trap was caused by a
 222      SW breakpoint triggering.  */
 223   int (*supports_stopped_by_sw_breakpoint) (void);
 224
 225   /* Returns 1 if the target stopped for a hardware breakpoint.  */
 226   int (*stopped_by_hw_breakpoint) (void);
 227
 228   /* Returns true if the target knows whether a trap was caused by a
 229      HW breakpoint triggering.  */
 230   int (*supports_stopped_by_hw_breakpoint) (void);
 231
 232   /* Returns true if the target can do hardware single step.  */
 233   int (*supports_hardware_single_step) (void);
 234
 235   /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise.  */
 236
 237   int (*stopped_by_watchpoint) (void);
 238
 239   /* Returns the address associated with the watchpoint that hit, if any;
 240      returns 0 otherwise.  */
 241
 242   CORE_ADDR (*stopped_data_address) (void);
 243
 244   /* Reports the text, data offsets of the executable.  This is
 245      needed for uclinux where the executable is relocated during load
 246      time.  */
 247
 248   int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
 249
 250   /* Fetch the address associated with a specific thread local storage
 251      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 252      Stores it in *ADDRESS and returns zero on success; otherwise returns
 253      an error code.  A return value of -1 means this system does not
 254      support the operation.  */
 255
 256   int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
 257                           CORE_ADDR load_module, CORE_ADDR *address);
 258
 259   /* Fill BUF with an hostio error packet representing the last hostio
 260      error.  */
 261   void (*hostio_last_error) (char *buf);
 262
 263   /* Read/Write OS data using qXfer packets.  */
 264   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
 265                        unsigned const char *writebuf, CORE_ADDR offset,
 266                        int len);
 267
 268   /* Read/Write extra signal info.  */
 269   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
 270                         unsigned const char *writebuf,
 271                         CORE_ADDR offset, int len);
 272
 273   int (*supports_non_stop) (void);
 274
 275   /* Enables async target events.  Returns the previous enable
 276      state.  */
 277   int (*async) (int enable);
 278
 279   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
 280      success, -1 otherwise.  */
 281   int (*start_non_stop) (int);
 282
 283   /* Returns true if the target supports multi-process debugging.  */
 284   int (*supports_multi_process) (void);
 285
 286   /* Returns true if fork events are supported.  */
 287   int (*supports_fork_events) (void);
 288
 289   /* Returns true if vfork events are supported.  */
 290   int (*supports_vfork_events) (void);
 291
 292   /* Returns true if exec events are supported.  */
 293   int (*supports_exec_events) (void);
 294
 295   /* Allows target to re-initialize connection-specific settings.  */
 296   void (*handle_new_gdb_connection) (void);
 297
 298   /* If not NULL, target-specific routine to process monitor command.
 299      Returns 1 if handled, or 0 to perform default processing.  */
 300   int (*handle_monitor_command) (char *);
 301
 302   /* Returns the core given a thread, or -1 if not known.  */
 303   int (*core_of_thread) (ptid_t);
 304
 305   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 306   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 307                        unsigned char *myaddr, unsigned int len);
 308
 309   /* Target specific qSupported support.  FEATURES is an array of
 310      features with COUNT elements.  */
 311   void (*process_qsupported) (char **features, int count);
 312
 313   /* Return 1 if the target supports tracepoints, 0 (or leave the
 314      callback NULL) otherwise.  */
 315   int (*supports_tracepoints) (void);
 316
 317   /* Read PC from REGCACHE.  */
 318   CORE_ADDR (*read_pc) (struct regcache *regcache);
 319
 320   /* Write PC to REGCACHE.  */
 321   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 322
 323   /* Return true if THREAD is known to be stopped now.  */
 324   int (*thread_stopped) (struct thread_info *thread);
 325
 326   /* Read Thread Information Block address.  */
 327   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 328
 329   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 330      be ignored until an unpause_all call unfreezes threads again.
 331      There can be nested calls to pause_all, so a freeze counter
 332      should be maintained.  */
 333   void (*pause_all) (int freeze);
 334
 335   /* Unpause all threads.  Threads that hadn't been resumed by the
 336      client should be left stopped.  Basically a pause/unpause call
 337      pair should not end up resuming threads that were stopped before
 338      the pause call.  */
 339   void (*unpause_all) (int unfreeze);
 340
 341   /* Stabilize all threads.  That is, force them out of jump pads.  */
 342   void (*stabilize_threads) (void);
 343
 344   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 345      tracepoint internal object as used by the IPA agent.  TPADDR is
 346      the address of tracepoint.  COLLECTOR is address of the function
 347      the jump pad redirects to.  LOCKADDR is the address of the jump
 348      pad lock object.  ORIG_SIZE is the size in bytes of the
 349      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 350      jump pad entry, and on return holds the address past the end of
 351      the created jump pad.  If a trampoline is created by the function,
 352      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 353      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 354      buffer containing a copy of the instruction at TPADDR.
 355      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 356      return the address range where the instruction at TPADDR was relocated
 357      to.  If an error occurs, the ERR may be used to pass on an error
 358      message.  */
 359   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 360                                            CORE_ADDR collector,
 361                                            CORE_ADDR lockaddr,
 362                                            ULONGEST orig_size,
 363                                            CORE_ADDR *jump_entry,
 364                                            CORE_ADDR *trampoline,
 365                                            ULONGEST *trampoline_size,
 366                                            unsigned char *jjump_pad_insn,
 367                                            ULONGEST *jjump_pad_insn_size,
 368                                            CORE_ADDR *adjusted_insn_addr,
 369                                            CORE_ADDR *adjusted_insn_addr_end,
 370                                            char *err);
 371
 372   /* Return the bytecode operations vector for the current inferior.
 373      Returns NULL if bytecode compilation is not supported.  */
 374   struct emit_ops *(*emit_ops) (void);
 375
 376   /* Returns true if the target supports disabling randomization.  */
 377   int (*supports_disable_randomization) (void);
 378
 379   /* Return the minimum length of an instruction that can be safely overwritten
 380      for use as a fast tracepoint.  */
 381   int (*get_min_fast_tracepoint_insn_len) (void);
 382
 383   /* Read solib info on SVR4 platforms.  */
 384   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 385                                unsigned const char *writebuf,
 386                                CORE_ADDR offset, int len);
 387
 388   /* Return true if target supports debugging agent.  */
 389   int (*supports_agent) (void);
 390
 391   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 392      target information struct for reading and for disabling branch trace.  */
 393   struct btrace_target_info *(*enable_btrace)
 394     (ptid_t ptid, const struct btrace_config *conf);
 395
 396   /* Disable branch tracing.
 397      Returns zero on success, non-zero otherwise.  */
 398   int (*disable_btrace) (struct btrace_target_info *tinfo);
 399
 400   /* Read branch trace data into buffer.
 401      Return 0 on success; print an error message into BUFFER and return -1,
 402      otherwise.  */
 403   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 404                       enum btrace_read_type type);
 405
 406   /* Read the branch trace configuration into BUFFER.
 407      Return 0 on success; print an error message into BUFFER and return -1
 408      otherwise.  */
 409   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 410
 411   /* Return true if target supports range stepping.  */
 412   int (*supports_range_stepping) (void);
 413
 414   /* Return the full absolute name of the executable file that was
 415      run to create the process PID.  If the executable file cannot
 416      be determined, NULL is returned.  Otherwise, a pointer to a
 417      character string containing the pathname is returned.  This
 418      string should be copied into a buffer by the client if the string
 419      will not be immediately used, or if it must persist.  */
 420   char *(*pid_to_exec_file) (int pid);
 421
 422   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 423      the filesystem as it appears to process PID.  Systems where all
 424      processes share a common filesystem should set this to NULL.
 425      If NULL, the caller should fall back to open(2).  */
 426   int (*multifs_open) (int pid, const char *filename,
 427                        int flags, mode_t mode);
 428
 429   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 430      in the filesystem as it appears to process PID.  Systems where
 431      all processes share a common filesystem should set this to NULL.
 432      If NULL, the caller should fall back to unlink(2).  */
 433   int (*multifs_unlink) (int pid, const char *filename);
 434
 435   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 436      operating in the filesystem as it appears to process PID.
 437      Systems where all processes share a common filesystem should
 438      set this to NULL.  If NULL, the caller should fall back to
 439      readlink(2).  */
 440   ssize_t (*multifs_readlink) (int pid, const char *filename,
 441                                char *buf, size_t bufsiz);
 442
 443   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 444      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 445      ARM) was present in the PC.  */
 446   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 447
 448   /* Return the software breakpoint from KIND.  KIND can have target
 449      specific meaning like the Z0 kind parameter.
 450      SIZE is set to the software breakpoint's length in memory.  */
 451   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 452
 453   /* Return the thread's name, or NULL if the target is unable to determine it.
 454      The returned value must not be freed by the caller.  */
 455   const char *(*thread_name) (ptid_t thread);
 456
 457   /* Return the breakpoint kind for this target based on the current
 458      processor state (e.g. the current instruction mode on ARM) and the
 459      PC.  The PCPTR is adjusted to the real memory location in case a flag
 460      (e.g., the Thumb bit on ARM) is present in the PC.  */
 461   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 462
 463   /* Returns true if the target can software single step.  */
 464   int (*supports_software_single_step) (void);
 465
 466   /* Return 1 if the target supports catch syscall, 0 (or leave the
 467      callback NULL) otherwise.  */
 468   int (*supports_catch_syscall) (void);
 469
 470   /* Return tdesc index for IPA.  */
 471   int (*get_ipa_tdesc_idx) (void);
 472
 473   /* Thread ID to (numeric) thread handle: Return true on success and
 474      false for failure.  Return pointer to thread handle via HANDLE
 475      and the handle's length via HANDLE_LEN.  */
 476   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 477 };
 478
 479 extern struct target_ops *the_target;
 480
 481 void set_target_ops (struct target_ops *);
 482
 483 #define create_inferior(program, program_args)  \
 484   (*the_target->create_inferior) (program, program_args)
 485
 486 #define target_post_create_inferior()                    \
 487   do                                                     \
 488     {                                                    \
 489       if (the_target->post_create_inferior != NULL)      \
 490         (*the_target->post_create_inferior) ();          \
 491     } while (0)
 492
 493 #define myattach(pid) \
 494   (*the_target->attach) (pid)
 495
 496 int kill_inferior (process_info *proc);
 497
 498 #define target_supports_fork_events() \
 499   (the_target->supports_fork_events ? \
 500    (*the_target->supports_fork_events) () : 0)
 501
 502 #define target_supports_vfork_events() \
 503   (the_target->supports_vfork_events ? \
 504    (*the_target->supports_vfork_events) () : 0)
 505
 506 #define target_supports_exec_events() \
 507   (the_target->supports_exec_events ? \
 508    (*the_target->supports_exec_events) () : 0)
 509
 510 #define target_handle_new_gdb_connection()               \
 511   do                                                     \
 512     {                                                    \
 513       if (the_target->handle_new_gdb_connection != NULL) \
 514         (*the_target->handle_new_gdb_connection) ();     \
 515     } while (0)
 516
 517 #define detach_inferior(proc) \
 518   (*the_target->detach) (proc)
 519
 520 #define mythread_alive(pid) \
 521   (*the_target->thread_alive) (pid)
 522
 523 #define fetch_inferior_registers(regcache, regno)       \
 524   (*the_target->fetch_registers) (regcache, regno)
 525
 526 #define store_inferior_registers(regcache, regno) \
 527   (*the_target->store_registers) (regcache, regno)
 528
 529 #define join_inferior(pid) \
 530   (*the_target->join) (pid)
 531
 532 #define target_supports_non_stop() \
 533   (the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
 534
 535 #define target_async(enable) \
 536   (the_target->async ? (*the_target->async) (enable) : 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_catch_syscall()                 \
 546   (the_target->supports_catch_syscall ?                 \
 547    (*the_target->supports_catch_syscall) () : 0)
 548
 549 #define target_get_ipa_tdesc_idx()                      \
 550   (the_target->get_ipa_tdesc_idx                        \
 551    ? (*the_target->get_ipa_tdesc_idx) () : 0)
 552
 553 #define target_supports_tracepoints()                   \
 554   (the_target->supports_tracepoints                     \
 555    ? (*the_target->supports_tracepoints) () : 0)
 556
 557 #define target_supports_fast_tracepoints()              \
 558   (the_target->install_fast_tracepoint_jump_pad != NULL)
 559
 560 #define target_get_min_fast_tracepoint_insn_len()       \
 561   (the_target->get_min_fast_tracepoint_insn_len         \
 562    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 563
 564 #define thread_stopped(thread) \
 565   (*the_target->thread_stopped) (thread)
 566
 567 #define pause_all(freeze)                       \
 568   do                                            \
 569     {                                           \
 570       if (the_target->pause_all)                \
 571         (*the_target->pause_all) (freeze);      \
 572     } while (0)
 573
 574 #define unpause_all(unfreeze)                   \
 575   do                                            \
 576     {                                           \
 577       if (the_target->unpause_all)              \
 578         (*the_target->unpause_all) (unfreeze);  \
 579     } while (0)
 580
 581 #define stabilize_threads()                     \
 582   do                                            \
 583     {                                           \
 584       if (the_target->stabilize_threads)        \
 585         (*the_target->stabilize_threads) ();    \
 586     } while (0)
 587
 588 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 589                                          collector, lockaddr,           \
 590                                          orig_size,                     \
 591                                          jump_entry,                    \
 592                                          trampoline, trampoline_size,   \
 593                                          jjump_pad_insn,                \
 594                                          jjump_pad_insn_size,           \
 595                                          adjusted_insn_addr,            \
 596                                          adjusted_insn_addr_end,        \
 597                                          err)                           \
 598   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 599                                                    collector,lockaddr,  \
 600                                                    orig_size, jump_entry, \
 601                                                    trampoline,          \
 602                                                    trampoline_size,     \
 603                                                    jjump_pad_insn,      \
 604                                                    jjump_pad_insn_size, \
 605                                                    adjusted_insn_addr,  \
 606                                                    adjusted_insn_addr_end, \
 607                                                    err)
 608
 609 #define target_emit_ops() \
 610   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 611
 612 #define target_supports_disable_randomization() \
 613   (the_target->supports_disable_randomization ? \
 614    (*the_target->supports_disable_randomization) () : 0)
 615
 616 #define target_supports_agent() \
 617   (the_target->supports_agent ? \
 618    (*the_target->supports_agent) () : 0)
 619
 620 static inline struct btrace_target_info *
 621 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 622 {
 623   if (the_target->enable_btrace == nullptr)
 624     error (_("Target does not support branch tracing."));
 625
 626   return (*the_target->enable_btrace) (ptid, conf);
 627 }
 628
 629 static inline int
 630 target_disable_btrace (struct btrace_target_info *tinfo)
 631 {
 632   if (the_target->disable_btrace == nullptr)
 633     error (_("Target does not support branch tracing."));
 634
 635   return (*the_target->disable_btrace) (tinfo);
 636 }
 637
 638 static inline int
 639 target_read_btrace (struct btrace_target_info *tinfo,
 640                     struct buffer *buffer,
 641                     enum btrace_read_type type)
 642 {
 643   if (the_target->read_btrace == nullptr)
 644     error (_("Target does not support branch tracing."));
 645
 646   return (*the_target->read_btrace) (tinfo, buffer, type);
 647 }
 648
 649 static inline int
 650 target_read_btrace_conf (struct btrace_target_info *tinfo,
 651                          struct buffer *buffer)
 652 {
 653   if (the_target->read_btrace_conf == nullptr)
 654     error (_("Target does not support branch tracing."));
 655
 656   return (*the_target->read_btrace_conf) (tinfo, buffer);
 657 }
 658
 659 #define target_supports_range_stepping() \
 660   (the_target->supports_range_stepping ? \
 661    (*the_target->supports_range_stepping) () : 0)
 662
 663 #define target_supports_stopped_by_sw_breakpoint() \
 664   (the_target->supports_stopped_by_sw_breakpoint ? \
 665    (*the_target->supports_stopped_by_sw_breakpoint) () : 0)
 666
 667 #define target_stopped_by_sw_breakpoint() \
 668   (the_target->stopped_by_sw_breakpoint ? \
 669    (*the_target->stopped_by_sw_breakpoint) () : 0)
 670
 671 #define target_supports_stopped_by_hw_breakpoint() \
 672   (the_target->supports_stopped_by_hw_breakpoint ? \
 673    (*the_target->supports_stopped_by_hw_breakpoint) () : 0)
 674
 675 #define target_supports_hardware_single_step() \
 676   (the_target->supports_hardware_single_step ? \
 677    (*the_target->supports_hardware_single_step) () : 0)
 678
 679 #define target_stopped_by_hw_breakpoint() \
 680   (the_target->stopped_by_hw_breakpoint ? \
 681    (*the_target->stopped_by_hw_breakpoint) () : 0)
 682
 683 #define target_breakpoint_kind_from_pc(pcptr) \
 684   (the_target->breakpoint_kind_from_pc \
 685    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 686    : default_breakpoint_kind_from_pc (pcptr))
 687
 688 #define target_breakpoint_kind_from_current_state(pcptr) \
 689   (the_target->breakpoint_kind_from_current_state \
 690    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 691    : target_breakpoint_kind_from_pc (pcptr))
 692
 693 #define target_supports_software_single_step() \
 694   (the_target->supports_software_single_step ? \
 695    (*the_target->supports_software_single_step) () : 0)
 696
 697 /* Start non-stop mode, returns 0 on success, -1 on failure.   */
 698
 699 int start_non_stop (int nonstop);
 700
 701 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 702                int connected_wait);
 703
 704 /* Prepare to read or write memory from the inferior process.  See the
 705    corresponding target_ops methods for more details.  */
 706
 707 int prepare_to_access_memory (void);
 708 void done_accessing_memory (void);
 709
 710 #define target_core_of_thread(ptid)             \
 711   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 712    : -1)
 713
 714 #define target_thread_name(ptid)                                \
 715   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 716    : NULL)
 717
 718 #define target_thread_handle(ptid, handle, handle_len) \
 719    (the_target->thread_handle ? (*the_target->thread_handle) \
 720                                   (ptid, handle, handle_len) \
 721    : false)
 722
 723 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 724
 725 int set_desired_thread ();
 726
 727 const char *target_pid_to_str (ptid_t);
 728
 729 int target_can_do_hardware_single_step (void);
 730
 731 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 732
 733 #endif /* GDBSERVER_TARGET_H */