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