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 the core given a thread, or -1 if not known.  */
  74   int (*core_of_thread) (ptid_t);
  75
  76   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
  77   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
  78                        unsigned char *myaddr, unsigned int len);
  79
  80   /* Target specific qSupported support.  FEATURES is an array of
  81      features with COUNT elements.  */
  82   void (*process_qsupported) (char **features, int count);
  83
  84   /* Return 1 if the target supports tracepoints, 0 (or leave the
  85      callback NULL) otherwise.  */
  86   int (*supports_tracepoints) (void);
  87
  88   /* Read PC from REGCACHE.  */
  89   CORE_ADDR (*read_pc) (struct regcache *regcache);
  90
  91   /* Write PC to REGCACHE.  */
  92   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
  93
  94   /* Return true if THREAD is known to be stopped now.  */
  95   int (*thread_stopped) (struct thread_info *thread);
  96
  97   /* Read Thread Information Block address.  */
  98   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
  99
 100   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 101      be ignored until an unpause_all call unfreezes threads again.
 102      There can be nested calls to pause_all, so a freeze counter
 103      should be maintained.  */
 104   void (*pause_all) (int freeze);
 105
 106   /* Unpause all threads.  Threads that hadn't been resumed by the
 107      client should be left stopped.  Basically a pause/unpause call
 108      pair should not end up resuming threads that were stopped before
 109      the pause call.  */
 110   void (*unpause_all) (int unfreeze);
 111
 112   /* Stabilize all threads.  That is, force them out of jump pads.  */
 113   void (*stabilize_threads) (void);
 114
 115   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 116      tracepoint internal object as used by the IPA agent.  TPADDR is
 117      the address of tracepoint.  COLLECTOR is address of the function
 118      the jump pad redirects to.  LOCKADDR is the address of the jump
 119      pad lock object.  ORIG_SIZE is the size in bytes of the
 120      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 121      jump pad entry, and on return holds the address past the end of
 122      the created jump pad.  If a trampoline is created by the function,
 123      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 124      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 125      buffer containing a copy of the instruction at TPADDR.
 126      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 127      return the address range where the instruction at TPADDR was relocated
 128      to.  If an error occurs, the ERR may be used to pass on an error
 129      message.  */
 130   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 131                                            CORE_ADDR collector,
 132                                            CORE_ADDR lockaddr,
 133                                            ULONGEST orig_size,
 134                                            CORE_ADDR *jump_entry,
 135                                            CORE_ADDR *trampoline,
 136                                            ULONGEST *trampoline_size,
 137                                            unsigned char *jjump_pad_insn,
 138                                            ULONGEST *jjump_pad_insn_size,
 139                                            CORE_ADDR *adjusted_insn_addr,
 140                                            CORE_ADDR *adjusted_insn_addr_end,
 141                                            char *err);
 142
 143   /* Return the bytecode operations vector for the current inferior.
 144      Returns NULL if bytecode compilation is not supported.  */
 145   struct emit_ops *(*emit_ops) (void);
 146
 147   /* Returns true if the target supports disabling randomization.  */
 148   int (*supports_disable_randomization) (void);
 149
 150   /* Return the minimum length of an instruction that can be safely overwritten
 151      for use as a fast tracepoint.  */
 152   int (*get_min_fast_tracepoint_insn_len) (void);
 153
 154   /* Read solib info on SVR4 platforms.  */
 155   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 156                                unsigned const char *writebuf,
 157                                CORE_ADDR offset, int len);
 158
 159   /* Return true if target supports debugging agent.  */
 160   int (*supports_agent) (void);
 161
 162   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 163      target information struct for reading and for disabling branch trace.  */
 164   struct btrace_target_info *(*enable_btrace)
 165     (ptid_t ptid, const struct btrace_config *conf);
 166
 167   /* Disable branch tracing.
 168      Returns zero on success, non-zero otherwise.  */
 169   int (*disable_btrace) (struct btrace_target_info *tinfo);
 170
 171   /* Read branch trace data into buffer.
 172      Return 0 on success; print an error message into BUFFER and return -1,
 173      otherwise.  */
 174   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 175                       enum btrace_read_type type);
 176
 177   /* Read the branch trace configuration into BUFFER.
 178      Return 0 on success; print an error message into BUFFER and return -1
 179      otherwise.  */
 180   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 181
 182   /* Return true if target supports range stepping.  */
 183   int (*supports_range_stepping) (void);
 184
 185   /* Return the full absolute name of the executable file that was
 186      run to create the process PID.  If the executable file cannot
 187      be determined, NULL is returned.  Otherwise, a pointer to a
 188      character string containing the pathname is returned.  This
 189      string should be copied into a buffer by the client if the string
 190      will not be immediately used, or if it must persist.  */
 191   char *(*pid_to_exec_file) (int pid);
 192
 193   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 194      the filesystem as it appears to process PID.  Systems where all
 195      processes share a common filesystem should set this to NULL.
 196      If NULL, the caller should fall back to open(2).  */
 197   int (*multifs_open) (int pid, const char *filename,
 198                        int flags, mode_t mode);
 199
 200   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 201      in the filesystem as it appears to process PID.  Systems where
 202      all processes share a common filesystem should set this to NULL.
 203      If NULL, the caller should fall back to unlink(2).  */
 204   int (*multifs_unlink) (int pid, const char *filename);
 205
 206   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 207      operating in the filesystem as it appears to process PID.
 208      Systems where all processes share a common filesystem should
 209      set this to NULL.  If NULL, the caller should fall back to
 210      readlink(2).  */
 211   ssize_t (*multifs_readlink) (int pid, const char *filename,
 212                                char *buf, size_t bufsiz);
 213
 214   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 215      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 216      ARM) was present in the PC.  */
 217   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 218
 219   /* Return the software breakpoint from KIND.  KIND can have target
 220      specific meaning like the Z0 kind parameter.
 221      SIZE is set to the software breakpoint's length in memory.  */
 222   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 223
 224   /* Return the thread's name, or NULL if the target is unable to determine it.
 225      The returned value must not be freed by the caller.  */
 226   const char *(*thread_name) (ptid_t thread);
 227
 228   /* Return the breakpoint kind for this target based on the current
 229      processor state (e.g. the current instruction mode on ARM) and the
 230      PC.  The PCPTR is adjusted to the real memory location in case a flag
 231      (e.g., the Thumb bit on ARM) is present in the PC.  */
 232   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 233
 234   /* Returns true if the target can software single step.  */
 235   int (*supports_software_single_step) (void);
 236
 237   /* Return 1 if the target supports catch syscall, 0 (or leave the
 238      callback NULL) otherwise.  */
 239   int (*supports_catch_syscall) (void);
 240
 241   /* Return tdesc index for IPA.  */
 242   int (*get_ipa_tdesc_idx) (void);
 243
 244   /* Thread ID to (numeric) thread handle: Return true on success and
 245      false for failure.  Return pointer to thread handle via HANDLE
 246      and the handle's length via HANDLE_LEN.  */
 247   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 248
 249   /* The object that will gradually replace this struct.  */
 250   process_target *pt;
 251 };
 252
 253 class process_target
 254 {
 255 public:
 256
 257   virtual ~process_target () = default;
 258
 259   /* Start a new process.
 260
 261      PROGRAM is a path to the program to execute.
 262      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 263      to be passed to the inferior as ``argv'' (along with PROGRAM).
 264
 265      Returns the new PID on success, -1 on failure.  Registers the new
 266      process with the process list.  */
 267   virtual int create_inferior (const char *program,
 268                                const std::vector<char *> &program_args) = 0;
 269
 270   /* Do additional setup after a new process is created, including
 271      exec-wrapper completion.  */
 272   virtual void post_create_inferior ();
 273
 274   /* Attach to a running process.
 275
 276      PID is the process ID to attach to, specified by the user
 277      or a higher layer.
 278
 279      Returns -1 if attaching is unsupported, 0 on success, and calls
 280      error() otherwise.  */
 281   virtual int attach (unsigned long pid) = 0;
 282
 283   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 284   virtual int kill (process_info *proc) = 0;
 285
 286   /* Detach from process PROC.  Return -1 on failure, and 0 on
 287      success.  */
 288   virtual int detach (process_info *proc) = 0;
 289
 290   /* The inferior process has died.  Do what is right.  */
 291   virtual void mourn (process_info *proc) = 0;
 292
 293   /* Wait for process PID to exit.  */
 294   virtual void join (int pid) = 0;
 295
 296   /* Return true iff the thread with process ID PID is alive.  */
 297   virtual bool thread_alive (ptid_t pid) = 0;
 298
 299   /* Resume the inferior process.  */
 300   virtual void resume (thread_resume *resume_info, size_t n) = 0;
 301
 302   /* Wait for the inferior process or thread to change state.  Store
 303      status through argument pointer STATUS.
 304
 305      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 306      wait for any thread of process pid to do something.  Return ptid
 307      of child, or -1 in case of error; store status through argument
 308      pointer STATUS.  OPTIONS is a bit set of options defined as
 309      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 310      no child stop to report, return is
 311      null_ptid/TARGET_WAITKIND_IGNORE.  */
 312   virtual ptid_t wait (ptid_t ptid, target_waitstatus *status,
 313                        int options) = 0;
 314
 315   /* Fetch registers from the inferior process.
 316
 317      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 318   virtual void fetch_registers (regcache *regcache, int regno) = 0;
 319
 320   /* Store registers to the inferior process.
 321
 322      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 323   virtual void store_registers (regcache *regcache, int regno) = 0;
 324
 325   /* Prepare to read or write memory from the inferior process.
 326      Targets use this to do what is necessary to get the state of the
 327      inferior such that it is possible to access memory.
 328
 329      This should generally only be called from client facing routines,
 330      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 331      insertion routine.
 332
 333      Like `read_memory' and `write_memory' below, returns 0 on success
 334      and errno on failure.  */
 335   virtual int prepare_to_access_memory ();
 336
 337   /* Undo the effects of prepare_to_access_memory.  */
 338   virtual void done_accessing_memory ();
 339
 340   /* Read memory from the inferior process.  This should generally be
 341      called through read_inferior_memory, which handles breakpoint shadowing.
 342
 343      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 344
 345      Returns 0 on success and errno on failure.  */
 346   virtual int read_memory (CORE_ADDR memaddr, unsigned char *myaddr,
 347                            int len) = 0;
 348
 349   /* Write memory to the inferior process.  This should generally be
 350      called through target_write_memory, which handles breakpoint shadowing.
 351
 352      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 353
 354      Returns 0 on success and errno on failure.  */
 355   virtual int write_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 356                             int len) = 0;
 357
 358   /* Query GDB for the values of any symbols we're interested in.
 359      This function is called whenever we receive a "qSymbols::"
 360      query, which corresponds to every time more symbols (might)
 361      become available.  */
 362   virtual void look_up_symbols ();
 363
 364   /* Send an interrupt request to the inferior process,
 365      however is appropriate.  */
 366   virtual void request_interrupt () = 0;
 367
 368   /* Return true if the read_auxv target op is supported.  */
 369   virtual bool supports_read_auxv ();
 370
 371   /* Read auxiliary vector data from the inferior process.
 372
 373      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 374   virtual int read_auxv (CORE_ADDR offset, unsigned char *myaddr,
 375                          unsigned int len);
 376
 377   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 378      otherwise.  The type is coded as follows:
 379        '0' - software-breakpoint
 380        '1' - hardware-breakpoint
 381        '2' - write watchpoint
 382        '3' - read watchpoint
 383        '4' - access watchpoint
 384   */
 385   virtual bool supports_z_point_type (char z_type);
 386
 387   /* Insert and remove a break or watchpoint.
 388      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 389   virtual int insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
 390                             int size, raw_breakpoint *bp);
 391
 392   virtual int remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
 393                             int size, raw_breakpoint *bp);
 394
 395   /* Returns true if the target stopped because it executed a software
 396      breakpoint instruction, false otherwise.  */
 397   virtual bool stopped_by_sw_breakpoint ();
 398
 399   /* Returns true if the target knows whether a trap was caused by a
 400      SW breakpoint triggering.  */
 401   virtual bool supports_stopped_by_sw_breakpoint ();
 402
 403   /* Returns true if the target stopped for a hardware breakpoint.  */
 404   virtual bool stopped_by_hw_breakpoint ();
 405
 406   /* Returns true if the target knows whether a trap was caused by a
 407      HW breakpoint triggering.  */
 408   virtual bool supports_stopped_by_hw_breakpoint ();
 409
 410   /* Returns true if the target can do hardware single step.  */
 411   virtual bool supports_hardware_single_step ();
 412
 413   /* Returns true if target was stopped due to a watchpoint hit, false
 414      otherwise.  */
 415   virtual bool stopped_by_watchpoint ();
 416
 417   /* Returns the address associated with the watchpoint that hit, if any;
 418      returns 0 otherwise.  */
 419   virtual CORE_ADDR stopped_data_address ();
 420
 421   /* Return true if the read_offsets target op is supported.  */
 422   virtual bool supports_read_offsets ();
 423
 424   /* Reports the text, data offsets of the executable.  This is
 425      needed for uclinux where the executable is relocated during load
 426      time.  */
 427   virtual int read_offsets (CORE_ADDR *text, CORE_ADDR *data);
 428
 429   /* Return true if the get_tls_address target op is supported.  */
 430   virtual bool supports_get_tls_address ();
 431
 432   /* Fetch the address associated with a specific thread local storage
 433      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 434      Stores it in *ADDRESS and returns zero on success; otherwise returns
 435      an error code.  A return value of -1 means this system does not
 436      support the operation.  */
 437   virtual int get_tls_address (thread_info *thread, CORE_ADDR offset,
 438                                CORE_ADDR load_module, CORE_ADDR *address);
 439
 440   /* Fill BUF with an hostio error packet representing the last hostio
 441      error.  */
 442   virtual void hostio_last_error (char *buf);
 443
 444   /* Return true if the qxfer_osdata target op is supported.  */
 445   virtual bool supports_qxfer_osdata ();
 446
 447   /* Read/Write OS data using qXfer packets.  */
 448   virtual int qxfer_osdata (const char *annex, unsigned char *readbuf,
 449                             unsigned const char *writebuf,
 450                             CORE_ADDR offset, int len);
 451
 452   /* Return true if the qxfer_siginfo target op is supported.  */
 453   virtual bool supports_qxfer_siginfo ();
 454
 455   /* Read/Write extra signal info.  */
 456   virtual int qxfer_siginfo (const char *annex, unsigned char *readbuf,
 457                              unsigned const char *writebuf,
 458                              CORE_ADDR offset, int len);
 459
 460   /* Return true if non-stop mode is supported.  */
 461   virtual bool supports_non_stop ();
 462
 463   /* Enables async target events.  Returns the previous enable
 464      state.  */
 465   virtual bool async (bool enable);
 466
 467   /* Switch to non-stop (ENABLE == true) or all-stop (ENABLE == false)
 468      mode.  Return 0 on success, -1 otherwise.  */
 469   virtual int start_non_stop (bool enable);
 470
 471   /* Returns true if the target supports multi-process debugging.  */
 472   virtual bool supports_multi_process ();
 473
 474   /* Returns true if fork events are supported.  */
 475   virtual bool supports_fork_events ();
 476
 477   /* Returns true if vfork events are supported.  */
 478   virtual bool supports_vfork_events ();
 479
 480   /* Returns true if exec events are supported.  */
 481   virtual bool supports_exec_events ();
 482
 483   /* Allows target to re-initialize connection-specific settings.  */
 484   virtual void handle_new_gdb_connection ();
 485
 486   /* The target-specific routine to process monitor command.
 487      Returns 1 if handled, or 0 to perform default processing.  */
 488   virtual int handle_monitor_command (char *mon);
 489 };
 490
 491 extern process_stratum_target *the_target;
 492
 493 void set_target_ops (process_stratum_target *);
 494
 495 #define target_create_inferior(program, program_args)   \
 496   the_target->pt->create_inferior (program, program_args)
 497
 498 #define target_post_create_inferior()                    \
 499   the_target->pt->post_create_inferior ()
 500
 501 #define myattach(pid) \
 502   the_target->pt->attach (pid)
 503
 504 int kill_inferior (process_info *proc);
 505
 506 #define target_supports_fork_events() \
 507   the_target->pt->supports_fork_events ()
 508
 509 #define target_supports_vfork_events() \
 510   the_target->pt->supports_vfork_events ()
 511
 512 #define target_supports_exec_events() \
 513   the_target->pt->supports_exec_events ()
 514
 515 #define target_handle_new_gdb_connection()               \
 516   the_target->pt->handle_new_gdb_connection ()
 517
 518 #define detach_inferior(proc) \
 519   the_target->pt->detach (proc)
 520
 521 #define mythread_alive(pid) \
 522   the_target->pt->thread_alive (pid)
 523
 524 #define fetch_inferior_registers(regcache, regno)       \
 525   the_target->pt->fetch_registers (regcache, regno)
 526
 527 #define store_inferior_registers(regcache, regno) \
 528   the_target->pt->store_registers (regcache, regno)
 529
 530 #define join_inferior(pid) \
 531   the_target->pt->join (pid)
 532
 533 #define target_supports_non_stop() \
 534   the_target->pt->supports_non_stop ()
 535
 536 #define target_async(enable) \
 537   the_target->pt->async (enable)
 538
 539 #define target_process_qsupported(features, count)      \
 540   do                                                    \
 541     {                                                   \
 542       if (the_target->process_qsupported)               \
 543         the_target->process_qsupported (features, count); \
 544     } while (0)
 545
 546 #define target_supports_catch_syscall()                 \
 547   (the_target->supports_catch_syscall ?                 \
 548    (*the_target->supports_catch_syscall) () : 0)
 549
 550 #define target_get_ipa_tdesc_idx()                      \
 551   (the_target->get_ipa_tdesc_idx                        \
 552    ? (*the_target->get_ipa_tdesc_idx) () : 0)
 553
 554 #define target_supports_tracepoints()                   \
 555   (the_target->supports_tracepoints                     \
 556    ? (*the_target->supports_tracepoints) () : 0)
 557
 558 #define target_supports_fast_tracepoints()              \
 559   (the_target->install_fast_tracepoint_jump_pad != NULL)
 560
 561 #define target_get_min_fast_tracepoint_insn_len()       \
 562   (the_target->get_min_fast_tracepoint_insn_len         \
 563    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 564
 565 #define thread_stopped(thread) \
 566   (*the_target->thread_stopped) (thread)
 567
 568 #define pause_all(freeze)                       \
 569   do                                            \
 570     {                                           \
 571       if (the_target->pause_all)                \
 572         (*the_target->pause_all) (freeze);      \
 573     } while (0)
 574
 575 #define unpause_all(unfreeze)                   \
 576   do                                            \
 577     {                                           \
 578       if (the_target->unpause_all)              \
 579         (*the_target->unpause_all) (unfreeze);  \
 580     } while (0)
 581
 582 #define stabilize_threads()                     \
 583   do                                            \
 584     {                                           \
 585       if (the_target->stabilize_threads)        \
 586         (*the_target->stabilize_threads) ();    \
 587     } while (0)
 588
 589 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 590                                          collector, lockaddr,           \
 591                                          orig_size,                     \
 592                                          jump_entry,                    \
 593                                          trampoline, trampoline_size,   \
 594                                          jjump_pad_insn,                \
 595                                          jjump_pad_insn_size,           \
 596                                          adjusted_insn_addr,            \
 597                                          adjusted_insn_addr_end,        \
 598                                          err)                           \
 599   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 600                                                    collector,lockaddr,  \
 601                                                    orig_size, jump_entry, \
 602                                                    trampoline,          \
 603                                                    trampoline_size,     \
 604                                                    jjump_pad_insn,      \
 605                                                    jjump_pad_insn_size, \
 606                                                    adjusted_insn_addr,  \
 607                                                    adjusted_insn_addr_end, \
 608                                                    err)
 609
 610 #define target_emit_ops() \
 611   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 612
 613 #define target_supports_disable_randomization() \
 614   (the_target->supports_disable_randomization ? \
 615    (*the_target->supports_disable_randomization) () : 0)
 616
 617 #define target_supports_agent() \
 618   (the_target->supports_agent ? \
 619    (*the_target->supports_agent) () : 0)
 620
 621 static inline struct btrace_target_info *
 622 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 623 {
 624   if (the_target->enable_btrace == nullptr)
 625     error (_("Target does not support branch tracing."));
 626
 627   return (*the_target->enable_btrace) (ptid, conf);
 628 }
 629
 630 static inline int
 631 target_disable_btrace (struct btrace_target_info *tinfo)
 632 {
 633   if (the_target->disable_btrace == nullptr)
 634     error (_("Target does not support branch tracing."));
 635
 636   return (*the_target->disable_btrace) (tinfo);
 637 }
 638
 639 static inline int
 640 target_read_btrace (struct btrace_target_info *tinfo,
 641                     struct buffer *buffer,
 642                     enum btrace_read_type type)
 643 {
 644   if (the_target->read_btrace == nullptr)
 645     error (_("Target does not support branch tracing."));
 646
 647   return (*the_target->read_btrace) (tinfo, buffer, type);
 648 }
 649
 650 static inline int
 651 target_read_btrace_conf (struct btrace_target_info *tinfo,
 652                          struct buffer *buffer)
 653 {
 654   if (the_target->read_btrace_conf == nullptr)
 655     error (_("Target does not support branch tracing."));
 656
 657   return (*the_target->read_btrace_conf) (tinfo, buffer);
 658 }
 659
 660 #define target_supports_range_stepping() \
 661   (the_target->supports_range_stepping ? \
 662    (*the_target->supports_range_stepping) () : 0)
 663
 664 #define target_supports_stopped_by_sw_breakpoint() \
 665   the_target->pt->supports_stopped_by_sw_breakpoint ()
 666
 667 #define target_stopped_by_sw_breakpoint() \
 668   the_target->pt->stopped_by_sw_breakpoint ()
 669
 670 #define target_supports_stopped_by_hw_breakpoint() \
 671   the_target->pt->supports_stopped_by_hw_breakpoint ()
 672
 673 #define target_supports_hardware_single_step() \
 674   the_target->pt->supports_hardware_single_step ()
 675
 676 #define target_stopped_by_hw_breakpoint() \
 677   the_target->pt->stopped_by_hw_breakpoint ()
 678
 679 #define target_breakpoint_kind_from_pc(pcptr) \
 680   (the_target->breakpoint_kind_from_pc \
 681    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 682    : default_breakpoint_kind_from_pc (pcptr))
 683
 684 #define target_breakpoint_kind_from_current_state(pcptr) \
 685   (the_target->breakpoint_kind_from_current_state \
 686    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 687    : target_breakpoint_kind_from_pc (pcptr))
 688
 689 #define target_supports_software_single_step() \
 690   (the_target->supports_software_single_step ? \
 691    (*the_target->supports_software_single_step) () : 0)
 692
 693 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 694                int connected_wait);
 695
 696 /* Prepare to read or write memory from the inferior process.  See the
 697    corresponding process_stratum_target methods for more details.  */
 698
 699 int prepare_to_access_memory (void);
 700 void done_accessing_memory (void);
 701
 702 #define target_core_of_thread(ptid)             \
 703   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 704    : -1)
 705
 706 #define target_thread_name(ptid)                                \
 707   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 708    : NULL)
 709
 710 #define target_thread_handle(ptid, handle, handle_len) \
 711    (the_target->thread_handle ? (*the_target->thread_handle) \
 712                                   (ptid, handle, handle_len) \
 713    : false)
 714
 715 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 716
 717 int set_desired_thread ();
 718
 719 const char *target_pid_to_str (ptid_t);
 720
 721 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 722
 723 #endif /* GDBSERVER_TARGET_H */