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