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   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
  74      tracepoint internal object as used by the IPA agent.  TPADDR is
  75      the address of tracepoint.  COLLECTOR is address of the function
  76      the jump pad redirects to.  LOCKADDR is the address of the jump
  77      pad lock object.  ORIG_SIZE is the size in bytes of the
  78      instruction at TPADDR.  JUMP_ENTRY points to the address of the
  79      jump pad entry, and on return holds the address past the end of
  80      the created jump pad.  If a trampoline is created by the function,
  81      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
  82      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
  83      buffer containing a copy of the instruction at TPADDR.
  84      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
  85      return the address range where the instruction at TPADDR was relocated
  86      to.  If an error occurs, the ERR may be used to pass on an error
  87      message.  */
  88   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
  89                                            CORE_ADDR collector,
  90                                            CORE_ADDR lockaddr,
  91                                            ULONGEST orig_size,
  92                                            CORE_ADDR *jump_entry,
  93                                            CORE_ADDR *trampoline,
  94                                            ULONGEST *trampoline_size,
  95                                            unsigned char *jjump_pad_insn,
  96                                            ULONGEST *jjump_pad_insn_size,
  97                                            CORE_ADDR *adjusted_insn_addr,
  98                                            CORE_ADDR *adjusted_insn_addr_end,
  99                                            char *err);
 100
 101   /* Return the bytecode operations vector for the current inferior.
 102      Returns NULL if bytecode compilation is not supported.  */
 103   struct emit_ops *(*emit_ops) (void);
 104
 105   /* Returns true if the target supports disabling randomization.  */
 106   int (*supports_disable_randomization) (void);
 107
 108   /* Return the minimum length of an instruction that can be safely overwritten
 109      for use as a fast tracepoint.  */
 110   int (*get_min_fast_tracepoint_insn_len) (void);
 111
 112   /* Read solib info on SVR4 platforms.  */
 113   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 114                                unsigned const char *writebuf,
 115                                CORE_ADDR offset, int len);
 116
 117   /* Return true if target supports debugging agent.  */
 118   int (*supports_agent) (void);
 119
 120   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 121      target information struct for reading and for disabling branch trace.  */
 122   struct btrace_target_info *(*enable_btrace)
 123     (ptid_t ptid, const struct btrace_config *conf);
 124
 125   /* Disable branch tracing.
 126      Returns zero on success, non-zero otherwise.  */
 127   int (*disable_btrace) (struct btrace_target_info *tinfo);
 128
 129   /* Read branch trace data into buffer.
 130      Return 0 on success; print an error message into BUFFER and return -1,
 131      otherwise.  */
 132   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 133                       enum btrace_read_type type);
 134
 135   /* Read the branch trace configuration into BUFFER.
 136      Return 0 on success; print an error message into BUFFER and return -1
 137      otherwise.  */
 138   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 139
 140   /* Return true if target supports range stepping.  */
 141   int (*supports_range_stepping) (void);
 142
 143   /* Return the full absolute name of the executable file that was
 144      run to create the process PID.  If the executable file cannot
 145      be determined, NULL is returned.  Otherwise, a pointer to a
 146      character string containing the pathname is returned.  This
 147      string should be copied into a buffer by the client if the string
 148      will not be immediately used, or if it must persist.  */
 149   char *(*pid_to_exec_file) (int pid);
 150
 151   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 152      the filesystem as it appears to process PID.  Systems where all
 153      processes share a common filesystem should set this to NULL.
 154      If NULL, the caller should fall back to open(2).  */
 155   int (*multifs_open) (int pid, const char *filename,
 156                        int flags, mode_t mode);
 157
 158   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 159      in the filesystem as it appears to process PID.  Systems where
 160      all processes share a common filesystem should set this to NULL.
 161      If NULL, the caller should fall back to unlink(2).  */
 162   int (*multifs_unlink) (int pid, const char *filename);
 163
 164   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 165      operating in the filesystem as it appears to process PID.
 166      Systems where all processes share a common filesystem should
 167      set this to NULL.  If NULL, the caller should fall back to
 168      readlink(2).  */
 169   ssize_t (*multifs_readlink) (int pid, const char *filename,
 170                                char *buf, size_t bufsiz);
 171
 172   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 173      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 174      ARM) was present in the PC.  */
 175   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 176
 177   /* Return the software breakpoint from KIND.  KIND can have target
 178      specific meaning like the Z0 kind parameter.
 179      SIZE is set to the software breakpoint's length in memory.  */
 180   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 181
 182   /* Return the thread's name, or NULL if the target is unable to determine it.
 183      The returned value must not be freed by the caller.  */
 184   const char *(*thread_name) (ptid_t thread);
 185
 186   /* Return the breakpoint kind for this target based on the current
 187      processor state (e.g. the current instruction mode on ARM) and the
 188      PC.  The PCPTR is adjusted to the real memory location in case a flag
 189      (e.g., the Thumb bit on ARM) is present in the PC.  */
 190   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 191
 192   /* Returns true if the target can software single step.  */
 193   int (*supports_software_single_step) (void);
 194
 195   /* Return 1 if the target supports catch syscall, 0 (or leave the
 196      callback NULL) otherwise.  */
 197   int (*supports_catch_syscall) (void);
 198
 199   /* Return tdesc index for IPA.  */
 200   int (*get_ipa_tdesc_idx) (void);
 201
 202   /* Thread ID to (numeric) thread handle: Return true on success and
 203      false for failure.  Return pointer to thread handle via HANDLE
 204      and the handle's length via HANDLE_LEN.  */
 205   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 206
 207   /* The object that will gradually replace this struct.  */
 208   process_target *pt;
 209 };
 210
 211 class process_target
 212 {
 213 public:
 214
 215   virtual ~process_target () = default;
 216
 217   /* Start a new process.
 218
 219      PROGRAM is a path to the program to execute.
 220      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 221      to be passed to the inferior as ``argv'' (along with PROGRAM).
 222
 223      Returns the new PID on success, -1 on failure.  Registers the new
 224      process with the process list.  */
 225   virtual int create_inferior (const char *program,
 226                                const std::vector<char *> &program_args) = 0;
 227
 228   /* Do additional setup after a new process is created, including
 229      exec-wrapper completion.  */
 230   virtual void post_create_inferior ();
 231
 232   /* Attach to a running process.
 233
 234      PID is the process ID to attach to, specified by the user
 235      or a higher layer.
 236
 237      Returns -1 if attaching is unsupported, 0 on success, and calls
 238      error() otherwise.  */
 239   virtual int attach (unsigned long pid) = 0;
 240
 241   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 242   virtual int kill (process_info *proc) = 0;
 243
 244   /* Detach from process PROC.  Return -1 on failure, and 0 on
 245      success.  */
 246   virtual int detach (process_info *proc) = 0;
 247
 248   /* The inferior process has died.  Do what is right.  */
 249   virtual void mourn (process_info *proc) = 0;
 250
 251   /* Wait for process PID to exit.  */
 252   virtual void join (int pid) = 0;
 253
 254   /* Return true iff the thread with process ID PID is alive.  */
 255   virtual bool thread_alive (ptid_t pid) = 0;
 256
 257   /* Resume the inferior process.  */
 258   virtual void resume (thread_resume *resume_info, size_t n) = 0;
 259
 260   /* Wait for the inferior process or thread to change state.  Store
 261      status through argument pointer STATUS.
 262
 263      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 264      wait for any thread of process pid to do something.  Return ptid
 265      of child, or -1 in case of error; store status through argument
 266      pointer STATUS.  OPTIONS is a bit set of options defined as
 267      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 268      no child stop to report, return is
 269      null_ptid/TARGET_WAITKIND_IGNORE.  */
 270   virtual ptid_t wait (ptid_t ptid, target_waitstatus *status,
 271                        int options) = 0;
 272
 273   /* Fetch registers from the inferior process.
 274
 275      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 276   virtual void fetch_registers (regcache *regcache, int regno) = 0;
 277
 278   /* Store registers to the inferior process.
 279
 280      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 281   virtual void store_registers (regcache *regcache, int regno) = 0;
 282
 283   /* Prepare to read or write memory from the inferior process.
 284      Targets use this to do what is necessary to get the state of the
 285      inferior such that it is possible to access memory.
 286
 287      This should generally only be called from client facing routines,
 288      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 289      insertion routine.
 290
 291      Like `read_memory' and `write_memory' below, returns 0 on success
 292      and errno on failure.  */
 293   virtual int prepare_to_access_memory ();
 294
 295   /* Undo the effects of prepare_to_access_memory.  */
 296   virtual void done_accessing_memory ();
 297
 298   /* Read memory from the inferior process.  This should generally be
 299      called through read_inferior_memory, which handles breakpoint shadowing.
 300
 301      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 302
 303      Returns 0 on success and errno on failure.  */
 304   virtual int read_memory (CORE_ADDR memaddr, unsigned char *myaddr,
 305                            int len) = 0;
 306
 307   /* Write memory to the inferior process.  This should generally be
 308      called through target_write_memory, which handles breakpoint shadowing.
 309
 310      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 311
 312      Returns 0 on success and errno on failure.  */
 313   virtual int write_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 314                             int len) = 0;
 315
 316   /* Query GDB for the values of any symbols we're interested in.
 317      This function is called whenever we receive a "qSymbols::"
 318      query, which corresponds to every time more symbols (might)
 319      become available.  */
 320   virtual void look_up_symbols ();
 321
 322   /* Send an interrupt request to the inferior process,
 323      however is appropriate.  */
 324   virtual void request_interrupt () = 0;
 325
 326   /* Return true if the read_auxv target op is supported.  */
 327   virtual bool supports_read_auxv ();
 328
 329   /* Read auxiliary vector data from the inferior process.
 330
 331      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 332   virtual int read_auxv (CORE_ADDR offset, unsigned char *myaddr,
 333                          unsigned int len);
 334
 335   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 336      otherwise.  The type is coded as follows:
 337        '0' - software-breakpoint
 338        '1' - hardware-breakpoint
 339        '2' - write watchpoint
 340        '3' - read watchpoint
 341        '4' - access watchpoint
 342   */
 343   virtual bool supports_z_point_type (char z_type);
 344
 345   /* Insert and remove a break or watchpoint.
 346      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 347   virtual int insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
 348                             int size, raw_breakpoint *bp);
 349
 350   virtual int remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
 351                             int size, raw_breakpoint *bp);
 352
 353   /* Returns true if the target stopped because it executed a software
 354      breakpoint instruction, false otherwise.  */
 355   virtual bool stopped_by_sw_breakpoint ();
 356
 357   /* Returns true if the target knows whether a trap was caused by a
 358      SW breakpoint triggering.  */
 359   virtual bool supports_stopped_by_sw_breakpoint ();
 360
 361   /* Returns true if the target stopped for a hardware breakpoint.  */
 362   virtual bool stopped_by_hw_breakpoint ();
 363
 364   /* Returns true if the target knows whether a trap was caused by a
 365      HW breakpoint triggering.  */
 366   virtual bool supports_stopped_by_hw_breakpoint ();
 367
 368   /* Returns true if the target can do hardware single step.  */
 369   virtual bool supports_hardware_single_step ();
 370
 371   /* Returns true if target was stopped due to a watchpoint hit, false
 372      otherwise.  */
 373   virtual bool stopped_by_watchpoint ();
 374
 375   /* Returns the address associated with the watchpoint that hit, if any;
 376      returns 0 otherwise.  */
 377   virtual CORE_ADDR stopped_data_address ();
 378
 379   /* Return true if the read_offsets target op is supported.  */
 380   virtual bool supports_read_offsets ();
 381
 382   /* Reports the text, data offsets of the executable.  This is
 383      needed for uclinux where the executable is relocated during load
 384      time.  */
 385   virtual int read_offsets (CORE_ADDR *text, CORE_ADDR *data);
 386
 387   /* Return true if the get_tls_address target op is supported.  */
 388   virtual bool supports_get_tls_address ();
 389
 390   /* Fetch the address associated with a specific thread local storage
 391      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 392      Stores it in *ADDRESS and returns zero on success; otherwise returns
 393      an error code.  A return value of -1 means this system does not
 394      support the operation.  */
 395   virtual int get_tls_address (thread_info *thread, CORE_ADDR offset,
 396                                CORE_ADDR load_module, CORE_ADDR *address);
 397
 398   /* Fill BUF with an hostio error packet representing the last hostio
 399      error.  */
 400   virtual void hostio_last_error (char *buf);
 401
 402   /* Return true if the qxfer_osdata target op is supported.  */
 403   virtual bool supports_qxfer_osdata ();
 404
 405   /* Read/Write OS data using qXfer packets.  */
 406   virtual int qxfer_osdata (const char *annex, unsigned char *readbuf,
 407                             unsigned const char *writebuf,
 408                             CORE_ADDR offset, int len);
 409
 410   /* Return true if the qxfer_siginfo target op is supported.  */
 411   virtual bool supports_qxfer_siginfo ();
 412
 413   /* Read/Write extra signal info.  */
 414   virtual int qxfer_siginfo (const char *annex, unsigned char *readbuf,
 415                              unsigned const char *writebuf,
 416                              CORE_ADDR offset, int len);
 417
 418   /* Return true if non-stop mode is supported.  */
 419   virtual bool supports_non_stop ();
 420
 421   /* Enables async target events.  Returns the previous enable
 422      state.  */
 423   virtual bool async (bool enable);
 424
 425   /* Switch to non-stop (ENABLE == true) or all-stop (ENABLE == false)
 426      mode.  Return 0 on success, -1 otherwise.  */
 427   virtual int start_non_stop (bool enable);
 428
 429   /* Returns true if the target supports multi-process debugging.  */
 430   virtual bool supports_multi_process ();
 431
 432   /* Returns true if fork events are supported.  */
 433   virtual bool supports_fork_events ();
 434
 435   /* Returns true if vfork events are supported.  */
 436   virtual bool supports_vfork_events ();
 437
 438   /* Returns true if exec events are supported.  */
 439   virtual bool supports_exec_events ();
 440
 441   /* Allows target to re-initialize connection-specific settings.  */
 442   virtual void handle_new_gdb_connection ();
 443
 444   /* The target-specific routine to process monitor command.
 445      Returns 1 if handled, or 0 to perform default processing.  */
 446   virtual int handle_monitor_command (char *mon);
 447
 448   /* Returns the core given a thread, or -1 if not known.  */
 449   virtual int core_of_thread (ptid_t ptid);
 450
 451   /* Returns true if the read_loadmap target op is supported.  */
 452   virtual bool supports_read_loadmap ();
 453
 454   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 455   virtual int read_loadmap (const char *annex, CORE_ADDR offset,
 456                             unsigned char *myaddr, unsigned int len);
 457
 458   /* Target specific qSupported support.  FEATURES is an array of
 459      features with COUNT elements.  */
 460   virtual void process_qsupported (char **features, int count);
 461
 462   /* Return true if the target supports tracepoints, false otherwise.  */
 463   virtual bool supports_tracepoints ();
 464
 465   /* Read PC from REGCACHE.  */
 466   virtual CORE_ADDR read_pc (regcache *regcache);
 467
 468   /* Write PC to REGCACHE.  */
 469   virtual void write_pc (regcache *regcache, CORE_ADDR pc);
 470
 471   /* Return true if the thread_stopped op is supported.  */
 472   virtual bool supports_thread_stopped ();
 473
 474   /* Return true if THREAD is known to be stopped now.  */
 475   virtual bool thread_stopped (thread_info *thread);
 476
 477   /* Return true if the get_tib_address op is supported.  */
 478   virtual bool supports_get_tib_address ();
 479
 480   /* Read Thread Information Block address.  */
 481   virtual int get_tib_address (ptid_t ptid, CORE_ADDR *address);
 482
 483   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 484      be ignored until an unpause_all call unfreezes threads again.
 485      There can be nested calls to pause_all, so a freeze counter
 486      should be maintained.  */
 487   virtual void pause_all (bool freeze);
 488
 489   /* Unpause all threads.  Threads that hadn't been resumed by the
 490      client should be left stopped.  Basically a pause/unpause call
 491      pair should not end up resuming threads that were stopped before
 492      the pause call.  */
 493   virtual void unpause_all (bool unfreeze);
 494
 495   /* Stabilize all threads.  That is, force them out of jump pads.  */
 496   virtual void stabilize_threads ();
 497 };
 498
 499 extern process_stratum_target *the_target;
 500
 501 void set_target_ops (process_stratum_target *);
 502
 503 #define target_create_inferior(program, program_args)   \
 504   the_target->pt->create_inferior (program, program_args)
 505
 506 #define target_post_create_inferior()                    \
 507   the_target->pt->post_create_inferior ()
 508
 509 #define myattach(pid) \
 510   the_target->pt->attach (pid)
 511
 512 int kill_inferior (process_info *proc);
 513
 514 #define target_supports_fork_events() \
 515   the_target->pt->supports_fork_events ()
 516
 517 #define target_supports_vfork_events() \
 518   the_target->pt->supports_vfork_events ()
 519
 520 #define target_supports_exec_events() \
 521   the_target->pt->supports_exec_events ()
 522
 523 #define target_handle_new_gdb_connection()               \
 524   the_target->pt->handle_new_gdb_connection ()
 525
 526 #define detach_inferior(proc) \
 527   the_target->pt->detach (proc)
 528
 529 #define mythread_alive(pid) \
 530   the_target->pt->thread_alive (pid)
 531
 532 #define fetch_inferior_registers(regcache, regno)       \
 533   the_target->pt->fetch_registers (regcache, regno)
 534
 535 #define store_inferior_registers(regcache, regno) \
 536   the_target->pt->store_registers (regcache, regno)
 537
 538 #define join_inferior(pid) \
 539   the_target->pt->join (pid)
 540
 541 #define target_supports_non_stop() \
 542   the_target->pt->supports_non_stop ()
 543
 544 #define target_async(enable) \
 545   the_target->pt->async (enable)
 546
 547 #define target_process_qsupported(features, count)      \
 548   the_target->pt->process_qsupported (features, count)
 549
 550 #define target_supports_catch_syscall()                 \
 551   (the_target->supports_catch_syscall ?                 \
 552    (*the_target->supports_catch_syscall) () : 0)
 553
 554 #define target_get_ipa_tdesc_idx()                      \
 555   (the_target->get_ipa_tdesc_idx                        \
 556    ? (*the_target->get_ipa_tdesc_idx) () : 0)
 557
 558 #define target_supports_tracepoints()                   \
 559   the_target->pt->supports_tracepoints ()
 560
 561 #define target_supports_fast_tracepoints()              \
 562   (the_target->install_fast_tracepoint_jump_pad != NULL)
 563
 564 #define target_get_min_fast_tracepoint_insn_len()       \
 565   (the_target->get_min_fast_tracepoint_insn_len         \
 566    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 567
 568 #define target_thread_stopped(thread) \
 569   the_target->pt->thread_stopped (thread)
 570
 571 #define target_pause_all(freeze)                \
 572   the_target->pt->pause_all (freeze)
 573
 574 #define target_unpause_all(unfreeze)            \
 575   the_target->pt->unpause_all (unfreeze)
 576
 577 #define target_stabilize_threads()              \
 578   the_target->pt->stabilize_threads ()
 579
 580 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 581                                          collector, lockaddr,           \
 582                                          orig_size,                     \
 583                                          jump_entry,                    \
 584                                          trampoline, trampoline_size,   \
 585                                          jjump_pad_insn,                \
 586                                          jjump_pad_insn_size,           \
 587                                          adjusted_insn_addr,            \
 588                                          adjusted_insn_addr_end,        \
 589                                          err)                           \
 590   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 591                                                    collector,lockaddr,  \
 592                                                    orig_size, jump_entry, \
 593                                                    trampoline,          \
 594                                                    trampoline_size,     \
 595                                                    jjump_pad_insn,      \
 596                                                    jjump_pad_insn_size, \
 597                                                    adjusted_insn_addr,  \
 598                                                    adjusted_insn_addr_end, \
 599                                                    err)
 600
 601 #define target_emit_ops() \
 602   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 603
 604 #define target_supports_disable_randomization() \
 605   (the_target->supports_disable_randomization ? \
 606    (*the_target->supports_disable_randomization) () : 0)
 607
 608 #define target_supports_agent() \
 609   (the_target->supports_agent ? \
 610    (*the_target->supports_agent) () : 0)
 611
 612 static inline struct btrace_target_info *
 613 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 614 {
 615   if (the_target->enable_btrace == nullptr)
 616     error (_("Target does not support branch tracing."));
 617
 618   return (*the_target->enable_btrace) (ptid, conf);
 619 }
 620
 621 static inline int
 622 target_disable_btrace (struct btrace_target_info *tinfo)
 623 {
 624   if (the_target->disable_btrace == nullptr)
 625     error (_("Target does not support branch tracing."));
 626
 627   return (*the_target->disable_btrace) (tinfo);
 628 }
 629
 630 static inline int
 631 target_read_btrace (struct btrace_target_info *tinfo,
 632                     struct buffer *buffer,
 633                     enum btrace_read_type type)
 634 {
 635   if (the_target->read_btrace == nullptr)
 636     error (_("Target does not support branch tracing."));
 637
 638   return (*the_target->read_btrace) (tinfo, buffer, type);
 639 }
 640
 641 static inline int
 642 target_read_btrace_conf (struct btrace_target_info *tinfo,
 643                          struct buffer *buffer)
 644 {
 645   if (the_target->read_btrace_conf == nullptr)
 646     error (_("Target does not support branch tracing."));
 647
 648   return (*the_target->read_btrace_conf) (tinfo, buffer);
 649 }
 650
 651 #define target_supports_range_stepping() \
 652   (the_target->supports_range_stepping ? \
 653    (*the_target->supports_range_stepping) () : 0)
 654
 655 #define target_supports_stopped_by_sw_breakpoint() \
 656   the_target->pt->supports_stopped_by_sw_breakpoint ()
 657
 658 #define target_stopped_by_sw_breakpoint() \
 659   the_target->pt->stopped_by_sw_breakpoint ()
 660
 661 #define target_supports_stopped_by_hw_breakpoint() \
 662   the_target->pt->supports_stopped_by_hw_breakpoint ()
 663
 664 #define target_supports_hardware_single_step() \
 665   the_target->pt->supports_hardware_single_step ()
 666
 667 #define target_stopped_by_hw_breakpoint() \
 668   the_target->pt->stopped_by_hw_breakpoint ()
 669
 670 #define target_breakpoint_kind_from_pc(pcptr) \
 671   (the_target->breakpoint_kind_from_pc \
 672    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 673    : default_breakpoint_kind_from_pc (pcptr))
 674
 675 #define target_breakpoint_kind_from_current_state(pcptr) \
 676   (the_target->breakpoint_kind_from_current_state \
 677    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 678    : target_breakpoint_kind_from_pc (pcptr))
 679
 680 #define target_supports_software_single_step() \
 681   (the_target->supports_software_single_step ? \
 682    (*the_target->supports_software_single_step) () : 0)
 683
 684 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 685                int connected_wait);
 686
 687 /* Prepare to read or write memory from the inferior process.  See the
 688    corresponding process_stratum_target methods for more details.  */
 689
 690 int prepare_to_access_memory (void);
 691 void done_accessing_memory (void);
 692
 693 #define target_core_of_thread(ptid)             \
 694   the_target->pt->core_of_thread (ptid)
 695
 696 #define target_thread_name(ptid)                                \
 697   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 698    : NULL)
 699
 700 #define target_thread_handle(ptid, handle, handle_len) \
 701    (the_target->thread_handle ? (*the_target->thread_handle) \
 702                                   (ptid, handle, handle_len) \
 703    : false)
 704
 705 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 706
 707 int set_desired_thread ();
 708
 709 const char *target_pid_to_str (ptid_t);
 710
 711 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 712
 713 #endif /* GDBSERVER_TARGET_H */