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 class process_target;
  67
  68 /* GDBserver doesn't have a concept of strata like GDB, but we call
  69    its target vector "process_stratum" anyway for the benefit of
  70    shared code.  */
  71 struct process_stratum_target
  72 {
  73   /* Returns true if the target supports disabling randomization.  */
  74   int (*supports_disable_randomization) (void);
  75
  76   /* Read solib info on SVR4 platforms.  */
  77   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
  78                                unsigned const char *writebuf,
  79                                CORE_ADDR offset, int len);
  80
  81   /* Return true if target supports debugging agent.  */
  82   int (*supports_agent) (void);
  83
  84   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
  85      target information struct for reading and for disabling branch trace.  */
  86   struct btrace_target_info *(*enable_btrace)
  87     (ptid_t ptid, const struct btrace_config *conf);
  88
  89   /* Disable branch tracing.
  90      Returns zero on success, non-zero otherwise.  */
  91   int (*disable_btrace) (struct btrace_target_info *tinfo);
  92
  93   /* Read branch trace data into buffer.
  94      Return 0 on success; print an error message into BUFFER and return -1,
  95      otherwise.  */
  96   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
  97                       enum btrace_read_type type);
  98
  99   /* Read the branch trace configuration into BUFFER.
 100      Return 0 on success; print an error message into BUFFER and return -1
 101      otherwise.  */
 102   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 103
 104   /* Return true if target supports range stepping.  */
 105   int (*supports_range_stepping) (void);
 106
 107   /* Return the full absolute name of the executable file that was
 108      run to create the process PID.  If the executable file cannot
 109      be determined, NULL is returned.  Otherwise, a pointer to a
 110      character string containing the pathname is returned.  This
 111      string should be copied into a buffer by the client if the string
 112      will not be immediately used, or if it must persist.  */
 113   char *(*pid_to_exec_file) (int pid);
 114
 115   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 116      the filesystem as it appears to process PID.  Systems where all
 117      processes share a common filesystem should set this to NULL.
 118      If NULL, the caller should fall back to open(2).  */
 119   int (*multifs_open) (int pid, const char *filename,
 120                        int flags, mode_t mode);
 121
 122   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 123      in the filesystem as it appears to process PID.  Systems where
 124      all processes share a common filesystem should set this to NULL.
 125      If NULL, the caller should fall back to unlink(2).  */
 126   int (*multifs_unlink) (int pid, const char *filename);
 127
 128   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 129      operating in the filesystem as it appears to process PID.
 130      Systems where all processes share a common filesystem should
 131      set this to NULL.  If NULL, the caller should fall back to
 132      readlink(2).  */
 133   ssize_t (*multifs_readlink) (int pid, const char *filename,
 134                                char *buf, size_t bufsiz);
 135
 136   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 137      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 138      ARM) was present in the PC.  */
 139   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 140
 141   /* Return the software breakpoint from KIND.  KIND can have target
 142      specific meaning like the Z0 kind parameter.
 143      SIZE is set to the software breakpoint's length in memory.  */
 144   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 145
 146   /* Return the thread's name, or NULL if the target is unable to determine it.
 147      The returned value must not be freed by the caller.  */
 148   const char *(*thread_name) (ptid_t thread);
 149
 150   /* Return the breakpoint kind for this target based on the current
 151      processor state (e.g. the current instruction mode on ARM) and the
 152      PC.  The PCPTR is adjusted to the real memory location in case a flag
 153      (e.g., the Thumb bit on ARM) is present in the PC.  */
 154   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 155
 156   /* Returns true if the target can software single step.  */
 157   int (*supports_software_single_step) (void);
 158
 159   /* Return 1 if the target supports catch syscall, 0 (or leave the
 160      callback NULL) otherwise.  */
 161   int (*supports_catch_syscall) (void);
 162
 163   /* Return tdesc index for IPA.  */
 164   int (*get_ipa_tdesc_idx) (void);
 165
 166   /* Thread ID to (numeric) thread handle: Return true on success and
 167      false for failure.  Return pointer to thread handle via HANDLE
 168      and the handle's length via HANDLE_LEN.  */
 169   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 170
 171   /* The object that will gradually replace this struct.  */
 172   process_target *pt;
 173 };
 174
 175 class process_target
 176 {
 177 public:
 178
 179   virtual ~process_target () = default;
 180
 181   /* Start a new process.
 182
 183      PROGRAM is a path to the program to execute.
 184      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 185      to be passed to the inferior as ``argv'' (along with PROGRAM).
 186
 187      Returns the new PID on success, -1 on failure.  Registers the new
 188      process with the process list.  */
 189   virtual int create_inferior (const char *program,
 190                                const std::vector<char *> &program_args) = 0;
 191
 192   /* Do additional setup after a new process is created, including
 193      exec-wrapper completion.  */
 194   virtual void post_create_inferior ();
 195
 196   /* Attach to a running process.
 197
 198      PID is the process ID to attach to, specified by the user
 199      or a higher layer.
 200
 201      Returns -1 if attaching is unsupported, 0 on success, and calls
 202      error() otherwise.  */
 203   virtual int attach (unsigned long pid) = 0;
 204
 205   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 206   virtual int kill (process_info *proc) = 0;
 207
 208   /* Detach from process PROC.  Return -1 on failure, and 0 on
 209      success.  */
 210   virtual int detach (process_info *proc) = 0;
 211
 212   /* The inferior process has died.  Do what is right.  */
 213   virtual void mourn (process_info *proc) = 0;
 214
 215   /* Wait for process PID to exit.  */
 216   virtual void join (int pid) = 0;
 217
 218   /* Return true iff the thread with process ID PID is alive.  */
 219   virtual bool thread_alive (ptid_t pid) = 0;
 220
 221   /* Resume the inferior process.  */
 222   virtual void resume (thread_resume *resume_info, size_t n) = 0;
 223
 224   /* Wait for the inferior process or thread to change state.  Store
 225      status through argument pointer STATUS.
 226
 227      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 228      wait for any thread of process pid to do something.  Return ptid
 229      of child, or -1 in case of error; store status through argument
 230      pointer STATUS.  OPTIONS is a bit set of options defined as
 231      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 232      no child stop to report, return is
 233      null_ptid/TARGET_WAITKIND_IGNORE.  */
 234   virtual ptid_t wait (ptid_t ptid, target_waitstatus *status,
 235                        int options) = 0;
 236
 237   /* Fetch registers from the inferior process.
 238
 239      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 240   virtual void fetch_registers (regcache *regcache, int regno) = 0;
 241
 242   /* Store registers to the inferior process.
 243
 244      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 245   virtual void store_registers (regcache *regcache, int regno) = 0;
 246
 247   /* Prepare to read or write memory from the inferior process.
 248      Targets use this to do what is necessary to get the state of the
 249      inferior such that it is possible to access memory.
 250
 251      This should generally only be called from client facing routines,
 252      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 253      insertion routine.
 254
 255      Like `read_memory' and `write_memory' below, returns 0 on success
 256      and errno on failure.  */
 257   virtual int prepare_to_access_memory ();
 258
 259   /* Undo the effects of prepare_to_access_memory.  */
 260   virtual void done_accessing_memory ();
 261
 262   /* Read memory from the inferior process.  This should generally be
 263      called through read_inferior_memory, which handles breakpoint shadowing.
 264
 265      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 266
 267      Returns 0 on success and errno on failure.  */
 268   virtual int read_memory (CORE_ADDR memaddr, unsigned char *myaddr,
 269                            int len) = 0;
 270
 271   /* Write memory to the inferior process.  This should generally be
 272      called through target_write_memory, which handles breakpoint shadowing.
 273
 274      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 275
 276      Returns 0 on success and errno on failure.  */
 277   virtual int write_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 278                             int len) = 0;
 279
 280   /* Query GDB for the values of any symbols we're interested in.
 281      This function is called whenever we receive a "qSymbols::"
 282      query, which corresponds to every time more symbols (might)
 283      become available.  */
 284   virtual void look_up_symbols ();
 285
 286   /* Send an interrupt request to the inferior process,
 287      however is appropriate.  */
 288   virtual void request_interrupt () = 0;
 289
 290   /* Return true if the read_auxv target op is supported.  */
 291   virtual bool supports_read_auxv ();
 292
 293   /* Read auxiliary vector data from the inferior process.
 294
 295      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 296   virtual int read_auxv (CORE_ADDR offset, unsigned char *myaddr,
 297                          unsigned int len);
 298
 299   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 300      otherwise.  The type is coded as follows:
 301        '0' - software-breakpoint
 302        '1' - hardware-breakpoint
 303        '2' - write watchpoint
 304        '3' - read watchpoint
 305        '4' - access watchpoint
 306   */
 307   virtual bool supports_z_point_type (char z_type);
 308
 309   /* Insert and remove a break or watchpoint.
 310      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 311   virtual int insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
 312                             int size, raw_breakpoint *bp);
 313
 314   virtual int remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
 315                             int size, raw_breakpoint *bp);
 316
 317   /* Returns true if the target stopped because it executed a software
 318      breakpoint instruction, false otherwise.  */
 319   virtual bool stopped_by_sw_breakpoint ();
 320
 321   /* Returns true if the target knows whether a trap was caused by a
 322      SW breakpoint triggering.  */
 323   virtual bool supports_stopped_by_sw_breakpoint ();
 324
 325   /* Returns true if the target stopped for a hardware breakpoint.  */
 326   virtual bool stopped_by_hw_breakpoint ();
 327
 328   /* Returns true if the target knows whether a trap was caused by a
 329      HW breakpoint triggering.  */
 330   virtual bool supports_stopped_by_hw_breakpoint ();
 331
 332   /* Returns true if the target can do hardware single step.  */
 333   virtual bool supports_hardware_single_step ();
 334
 335   /* Returns true if target was stopped due to a watchpoint hit, false
 336      otherwise.  */
 337   virtual bool stopped_by_watchpoint ();
 338
 339   /* Returns the address associated with the watchpoint that hit, if any;
 340      returns 0 otherwise.  */
 341   virtual CORE_ADDR stopped_data_address ();
 342
 343   /* Return true if the read_offsets target op is supported.  */
 344   virtual bool supports_read_offsets ();
 345
 346   /* Reports the text, data offsets of the executable.  This is
 347      needed for uclinux where the executable is relocated during load
 348      time.  */
 349   virtual int read_offsets (CORE_ADDR *text, CORE_ADDR *data);
 350
 351   /* Return true if the get_tls_address target op is supported.  */
 352   virtual bool supports_get_tls_address ();
 353
 354   /* Fetch the address associated with a specific thread local storage
 355      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 356      Stores it in *ADDRESS and returns zero on success; otherwise returns
 357      an error code.  A return value of -1 means this system does not
 358      support the operation.  */
 359   virtual int get_tls_address (thread_info *thread, CORE_ADDR offset,
 360                                CORE_ADDR load_module, CORE_ADDR *address);
 361
 362   /* Fill BUF with an hostio error packet representing the last hostio
 363      error.  */
 364   virtual void hostio_last_error (char *buf);
 365
 366   /* Return true if the qxfer_osdata target op is supported.  */
 367   virtual bool supports_qxfer_osdata ();
 368
 369   /* Read/Write OS data using qXfer packets.  */
 370   virtual int qxfer_osdata (const char *annex, unsigned char *readbuf,
 371                             unsigned const char *writebuf,
 372                             CORE_ADDR offset, int len);
 373
 374   /* Return true if the qxfer_siginfo target op is supported.  */
 375   virtual bool supports_qxfer_siginfo ();
 376
 377   /* Read/Write extra signal info.  */
 378   virtual int qxfer_siginfo (const char *annex, unsigned char *readbuf,
 379                              unsigned const char *writebuf,
 380                              CORE_ADDR offset, int len);
 381
 382   /* Return true if non-stop mode is supported.  */
 383   virtual bool supports_non_stop ();
 384
 385   /* Enables async target events.  Returns the previous enable
 386      state.  */
 387   virtual bool async (bool enable);
 388
 389   /* Switch to non-stop (ENABLE == true) or all-stop (ENABLE == false)
 390      mode.  Return 0 on success, -1 otherwise.  */
 391   virtual int start_non_stop (bool enable);
 392
 393   /* Returns true if the target supports multi-process debugging.  */
 394   virtual bool supports_multi_process ();
 395
 396   /* Returns true if fork events are supported.  */
 397   virtual bool supports_fork_events ();
 398
 399   /* Returns true if vfork events are supported.  */
 400   virtual bool supports_vfork_events ();
 401
 402   /* Returns true if exec events are supported.  */
 403   virtual bool supports_exec_events ();
 404
 405   /* Allows target to re-initialize connection-specific settings.  */
 406   virtual void handle_new_gdb_connection ();
 407
 408   /* The target-specific routine to process monitor command.
 409      Returns 1 if handled, or 0 to perform default processing.  */
 410   virtual int handle_monitor_command (char *mon);
 411
 412   /* Returns the core given a thread, or -1 if not known.  */
 413   virtual int core_of_thread (ptid_t ptid);
 414
 415   /* Returns true if the read_loadmap target op is supported.  */
 416   virtual bool supports_read_loadmap ();
 417
 418   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 419   virtual int read_loadmap (const char *annex, CORE_ADDR offset,
 420                             unsigned char *myaddr, unsigned int len);
 421
 422   /* Target specific qSupported support.  FEATURES is an array of
 423      features with COUNT elements.  */
 424   virtual void process_qsupported (char **features, int count);
 425
 426   /* Return true if the target supports tracepoints, false otherwise.  */
 427   virtual bool supports_tracepoints ();
 428
 429   /* Read PC from REGCACHE.  */
 430   virtual CORE_ADDR read_pc (regcache *regcache);
 431
 432   /* Write PC to REGCACHE.  */
 433   virtual void write_pc (regcache *regcache, CORE_ADDR pc);
 434
 435   /* Return true if the thread_stopped op is supported.  */
 436   virtual bool supports_thread_stopped ();
 437
 438   /* Return true if THREAD is known to be stopped now.  */
 439   virtual bool thread_stopped (thread_info *thread);
 440
 441   /* Return true if the get_tib_address op is supported.  */
 442   virtual bool supports_get_tib_address ();
 443
 444   /* Read Thread Information Block address.  */
 445   virtual int get_tib_address (ptid_t ptid, CORE_ADDR *address);
 446
 447   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 448      be ignored until an unpause_all call unfreezes threads again.
 449      There can be nested calls to pause_all, so a freeze counter
 450      should be maintained.  */
 451   virtual void pause_all (bool freeze);
 452
 453   /* Unpause all threads.  Threads that hadn't been resumed by the
 454      client should be left stopped.  Basically a pause/unpause call
 455      pair should not end up resuming threads that were stopped before
 456      the pause call.  */
 457   virtual void unpause_all (bool unfreeze);
 458
 459   /* Stabilize all threads.  That is, force them out of jump pads.  */
 460   virtual void stabilize_threads ();
 461
 462   /* Return true if the install_fast_tracepoint_jump_pad op is
 463      supported.  */
 464   virtual bool supports_fast_tracepoints ();
 465
 466   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 467      tracepoint internal object as used by the IPA agent.  TPADDR is
 468      the address of tracepoint.  COLLECTOR is address of the function
 469      the jump pad redirects to.  LOCKADDR is the address of the jump
 470      pad lock object.  ORIG_SIZE is the size in bytes of the
 471      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 472      jump pad entry, and on return holds the address past the end of
 473      the created jump pad.  If a trampoline is created by the function,
 474      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 475      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 476      buffer containing a copy of the instruction at TPADDR.
 477      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 478      return the address range where the instruction at TPADDR was relocated
 479      to.  If an error occurs, the ERR may be used to pass on an error
 480      message.  */
 481   virtual int install_fast_tracepoint_jump_pad
 482     (CORE_ADDR tpoint, CORE_ADDR tpaddr, CORE_ADDR collector,
 483      CORE_ADDR lockaddr, ULONGEST orig_size, CORE_ADDR *jump_entry,
 484      CORE_ADDR *trampoline, ULONGEST *trampoline_size,
 485      unsigned char *jjump_pad_insn, ULONGEST *jjump_pad_insn_size,
 486      CORE_ADDR *adjusted_insn_addr, CORE_ADDR *adjusted_insn_addr_end,
 487      char *err);
 488
 489   /* Return the minimum length of an instruction that can be safely
 490      overwritten for use as a fast tracepoint.  */
 491   virtual int get_min_fast_tracepoint_insn_len ();
 492
 493   /* Return the bytecode operations vector for the current inferior.
 494      Returns nullptr if bytecode compilation is not supported.  */
 495   virtual struct emit_ops *emit_ops ();
 496 };
 497
 498 extern process_stratum_target *the_target;
 499
 500 void set_target_ops (process_stratum_target *);
 501
 502 #define target_create_inferior(program, program_args)   \
 503   the_target->pt->create_inferior (program, program_args)
 504
 505 #define target_post_create_inferior()                    \
 506   the_target->pt->post_create_inferior ()
 507
 508 #define myattach(pid) \
 509   the_target->pt->attach (pid)
 510
 511 int kill_inferior (process_info *proc);
 512
 513 #define target_supports_fork_events() \
 514   the_target->pt->supports_fork_events ()
 515
 516 #define target_supports_vfork_events() \
 517   the_target->pt->supports_vfork_events ()
 518
 519 #define target_supports_exec_events() \
 520   the_target->pt->supports_exec_events ()
 521
 522 #define target_handle_new_gdb_connection()               \
 523   the_target->pt->handle_new_gdb_connection ()
 524
 525 #define detach_inferior(proc) \
 526   the_target->pt->detach (proc)
 527
 528 #define mythread_alive(pid) \
 529   the_target->pt->thread_alive (pid)
 530
 531 #define fetch_inferior_registers(regcache, regno)       \
 532   the_target->pt->fetch_registers (regcache, regno)
 533
 534 #define store_inferior_registers(regcache, regno) \
 535   the_target->pt->store_registers (regcache, regno)
 536
 537 #define join_inferior(pid) \
 538   the_target->pt->join (pid)
 539
 540 #define target_supports_non_stop() \
 541   the_target->pt->supports_non_stop ()
 542
 543 #define target_async(enable) \
 544   the_target->pt->async (enable)
 545
 546 #define target_process_qsupported(features, count)      \
 547   the_target->pt->process_qsupported (features, count)
 548
 549 #define target_supports_catch_syscall()                 \
 550   (the_target->supports_catch_syscall ?                 \
 551    (*the_target->supports_catch_syscall) () : 0)
 552
 553 #define target_get_ipa_tdesc_idx()                      \
 554   (the_target->get_ipa_tdesc_idx                        \
 555    ? (*the_target->get_ipa_tdesc_idx) () : 0)
 556
 557 #define target_supports_tracepoints()                   \
 558   the_target->pt->supports_tracepoints ()
 559
 560 #define target_supports_fast_tracepoints()              \
 561   the_target->pt->supports_fast_tracepoints ()
 562
 563 #define target_get_min_fast_tracepoint_insn_len()       \
 564   the_target->pt->get_min_fast_tracepoint_insn_len ()
 565
 566 #define target_thread_stopped(thread) \
 567   the_target->pt->thread_stopped (thread)
 568
 569 #define target_pause_all(freeze)                \
 570   the_target->pt->pause_all (freeze)
 571
 572 #define target_unpause_all(unfreeze)            \
 573   the_target->pt->unpause_all (unfreeze)
 574
 575 #define target_stabilize_threads()              \
 576   the_target->pt->stabilize_threads ()
 577
 578 #define target_install_fast_tracepoint_jump_pad(tpoint, tpaddr,         \
 579                                                 collector, lockaddr,    \
 580                                                 orig_size,              \
 581                                                 jump_entry,             \
 582                                                 trampoline, trampoline_size, \
 583                                                 jjump_pad_insn,         \
 584                                                 jjump_pad_insn_size,    \
 585                                                 adjusted_insn_addr,     \
 586                                                 adjusted_insn_addr_end, \
 587                                                 err)                    \
 588   the_target->pt->install_fast_tracepoint_jump_pad (tpoint, tpaddr,     \
 589                                                     collector,lockaddr, \
 590                                                     orig_size, jump_entry, \
 591                                                     trampoline,         \
 592                                                     trampoline_size,    \
 593                                                     jjump_pad_insn,     \
 594                                                     jjump_pad_insn_size, \
 595                                                     adjusted_insn_addr, \
 596                                                     adjusted_insn_addr_end, \
 597                                                     err)
 598
 599 #define target_emit_ops() \
 600   the_target->pt->emit_ops ()
 601
 602 #define target_supports_disable_randomization() \
 603   (the_target->supports_disable_randomization ? \
 604    (*the_target->supports_disable_randomization) () : 0)
 605
 606 #define target_supports_agent() \
 607   (the_target->supports_agent ? \
 608    (*the_target->supports_agent) () : 0)
 609
 610 static inline struct btrace_target_info *
 611 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 612 {
 613   if (the_target->enable_btrace == nullptr)
 614     error (_("Target does not support branch tracing."));
 615
 616   return (*the_target->enable_btrace) (ptid, conf);
 617 }
 618
 619 static inline int
 620 target_disable_btrace (struct btrace_target_info *tinfo)
 621 {
 622   if (the_target->disable_btrace == nullptr)
 623     error (_("Target does not support branch tracing."));
 624
 625   return (*the_target->disable_btrace) (tinfo);
 626 }
 627
 628 static inline int
 629 target_read_btrace (struct btrace_target_info *tinfo,
 630                     struct buffer *buffer,
 631                     enum btrace_read_type type)
 632 {
 633   if (the_target->read_btrace == nullptr)
 634     error (_("Target does not support branch tracing."));
 635
 636   return (*the_target->read_btrace) (tinfo, buffer, type);
 637 }
 638
 639 static inline int
 640 target_read_btrace_conf (struct btrace_target_info *tinfo,
 641                          struct buffer *buffer)
 642 {
 643   if (the_target->read_btrace_conf == nullptr)
 644     error (_("Target does not support branch tracing."));
 645
 646   return (*the_target->read_btrace_conf) (tinfo, buffer);
 647 }
 648
 649 #define target_supports_range_stepping() \
 650   (the_target->supports_range_stepping ? \
 651    (*the_target->supports_range_stepping) () : 0)
 652
 653 #define target_supports_stopped_by_sw_breakpoint() \
 654   the_target->pt->supports_stopped_by_sw_breakpoint ()
 655
 656 #define target_stopped_by_sw_breakpoint() \
 657   the_target->pt->stopped_by_sw_breakpoint ()
 658
 659 #define target_supports_stopped_by_hw_breakpoint() \
 660   the_target->pt->supports_stopped_by_hw_breakpoint ()
 661
 662 #define target_supports_hardware_single_step() \
 663   the_target->pt->supports_hardware_single_step ()
 664
 665 #define target_stopped_by_hw_breakpoint() \
 666   the_target->pt->stopped_by_hw_breakpoint ()
 667
 668 #define target_breakpoint_kind_from_pc(pcptr) \
 669   (the_target->breakpoint_kind_from_pc \
 670    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 671    : default_breakpoint_kind_from_pc (pcptr))
 672
 673 #define target_breakpoint_kind_from_current_state(pcptr) \
 674   (the_target->breakpoint_kind_from_current_state \
 675    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 676    : target_breakpoint_kind_from_pc (pcptr))
 677
 678 #define target_supports_software_single_step() \
 679   (the_target->supports_software_single_step ? \
 680    (*the_target->supports_software_single_step) () : 0)
 681
 682 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 683                int connected_wait);
 684
 685 /* Prepare to read or write memory from the inferior process.  See the
 686    corresponding process_stratum_target methods for more details.  */
 687
 688 int prepare_to_access_memory (void);
 689 void done_accessing_memory (void);
 690
 691 #define target_core_of_thread(ptid)             \
 692   the_target->pt->core_of_thread (ptid)
 693
 694 #define target_thread_name(ptid)                                \
 695   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 696    : NULL)
 697
 698 #define target_thread_handle(ptid, handle, handle_len) \
 699    (the_target->thread_handle ? (*the_target->thread_handle) \
 700                                   (ptid, handle, handle_len) \
 701    : false)
 702
 703 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 704
 705 int set_desired_thread ();
 706
 707 const char *target_pid_to_str (ptid_t);
 708
 709 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 710
 711 #endif /* GDBSERVER_TARGET_H */