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   /* Allows target to re-initialize connection-specific settings.  */
  74   void (*handle_new_gdb_connection) (void);
  75
  76   /* If not NULL, target-specific routine to process monitor command.
  77      Returns 1 if handled, or 0 to perform default processing.  */
  78   int (*handle_monitor_command) (char *);
  79
  80   /* Returns the core given a thread, or -1 if not known.  */
  81   int (*core_of_thread) (ptid_t);
  82
  83   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
  84   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
  85                        unsigned char *myaddr, unsigned int len);
  86
  87   /* Target specific qSupported support.  FEATURES is an array of
  88      features with COUNT elements.  */
  89   void (*process_qsupported) (char **features, int count);
  90
  91   /* Return 1 if the target supports tracepoints, 0 (or leave the
  92      callback NULL) otherwise.  */
  93   int (*supports_tracepoints) (void);
  94
  95   /* Read PC from REGCACHE.  */
  96   CORE_ADDR (*read_pc) (struct regcache *regcache);
  97
  98   /* Write PC to REGCACHE.  */
  99   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 100
 101   /* Return true if THREAD is known to be stopped now.  */
 102   int (*thread_stopped) (struct thread_info *thread);
 103
 104   /* Read Thread Information Block address.  */
 105   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 106
 107   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 108      be ignored until an unpause_all call unfreezes threads again.
 109      There can be nested calls to pause_all, so a freeze counter
 110      should be maintained.  */
 111   void (*pause_all) (int freeze);
 112
 113   /* Unpause all threads.  Threads that hadn't been resumed by the
 114      client should be left stopped.  Basically a pause/unpause call
 115      pair should not end up resuming threads that were stopped before
 116      the pause call.  */
 117   void (*unpause_all) (int unfreeze);
 118
 119   /* Stabilize all threads.  That is, force them out of jump pads.  */
 120   void (*stabilize_threads) (void);
 121
 122   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 123      tracepoint internal object as used by the IPA agent.  TPADDR is
 124      the address of tracepoint.  COLLECTOR is address of the function
 125      the jump pad redirects to.  LOCKADDR is the address of the jump
 126      pad lock object.  ORIG_SIZE is the size in bytes of the
 127      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 128      jump pad entry, and on return holds the address past the end of
 129      the created jump pad.  If a trampoline is created by the function,
 130      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 131      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 132      buffer containing a copy of the instruction at TPADDR.
 133      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 134      return the address range where the instruction at TPADDR was relocated
 135      to.  If an error occurs, the ERR may be used to pass on an error
 136      message.  */
 137   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 138                                            CORE_ADDR collector,
 139                                            CORE_ADDR lockaddr,
 140                                            ULONGEST orig_size,
 141                                            CORE_ADDR *jump_entry,
 142                                            CORE_ADDR *trampoline,
 143                                            ULONGEST *trampoline_size,
 144                                            unsigned char *jjump_pad_insn,
 145                                            ULONGEST *jjump_pad_insn_size,
 146                                            CORE_ADDR *adjusted_insn_addr,
 147                                            CORE_ADDR *adjusted_insn_addr_end,
 148                                            char *err);
 149
 150   /* Return the bytecode operations vector for the current inferior.
 151      Returns NULL if bytecode compilation is not supported.  */
 152   struct emit_ops *(*emit_ops) (void);
 153
 154   /* Returns true if the target supports disabling randomization.  */
 155   int (*supports_disable_randomization) (void);
 156
 157   /* Return the minimum length of an instruction that can be safely overwritten
 158      for use as a fast tracepoint.  */
 159   int (*get_min_fast_tracepoint_insn_len) (void);
 160
 161   /* Read solib info on SVR4 platforms.  */
 162   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 163                                unsigned const char *writebuf,
 164                                CORE_ADDR offset, int len);
 165
 166   /* Return true if target supports debugging agent.  */
 167   int (*supports_agent) (void);
 168
 169   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 170      target information struct for reading and for disabling branch trace.  */
 171   struct btrace_target_info *(*enable_btrace)
 172     (ptid_t ptid, const struct btrace_config *conf);
 173
 174   /* Disable branch tracing.
 175      Returns zero on success, non-zero otherwise.  */
 176   int (*disable_btrace) (struct btrace_target_info *tinfo);
 177
 178   /* Read branch trace data into buffer.
 179      Return 0 on success; print an error message into BUFFER and return -1,
 180      otherwise.  */
 181   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 182                       enum btrace_read_type type);
 183
 184   /* Read the branch trace configuration into BUFFER.
 185      Return 0 on success; print an error message into BUFFER and return -1
 186      otherwise.  */
 187   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 188
 189   /* Return true if target supports range stepping.  */
 190   int (*supports_range_stepping) (void);
 191
 192   /* Return the full absolute name of the executable file that was
 193      run to create the process PID.  If the executable file cannot
 194      be determined, NULL is returned.  Otherwise, a pointer to a
 195      character string containing the pathname is returned.  This
 196      string should be copied into a buffer by the client if the string
 197      will not be immediately used, or if it must persist.  */
 198   char *(*pid_to_exec_file) (int pid);
 199
 200   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 201      the filesystem as it appears to process PID.  Systems where all
 202      processes share a common filesystem should set this to NULL.
 203      If NULL, the caller should fall back to open(2).  */
 204   int (*multifs_open) (int pid, const char *filename,
 205                        int flags, mode_t mode);
 206
 207   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 208      in the filesystem as it appears to process PID.  Systems where
 209      all processes share a common filesystem should set this to NULL.
 210      If NULL, the caller should fall back to unlink(2).  */
 211   int (*multifs_unlink) (int pid, const char *filename);
 212
 213   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 214      operating in the filesystem as it appears to process PID.
 215      Systems where all processes share a common filesystem should
 216      set this to NULL.  If NULL, the caller should fall back to
 217      readlink(2).  */
 218   ssize_t (*multifs_readlink) (int pid, const char *filename,
 219                                char *buf, size_t bufsiz);
 220
 221   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 222      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 223      ARM) was present in the PC.  */
 224   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 225
 226   /* Return the software breakpoint from KIND.  KIND can have target
 227      specific meaning like the Z0 kind parameter.
 228      SIZE is set to the software breakpoint's length in memory.  */
 229   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 230
 231   /* Return the thread's name, or NULL if the target is unable to determine it.
 232      The returned value must not be freed by the caller.  */
 233   const char *(*thread_name) (ptid_t thread);
 234
 235   /* Return the breakpoint kind for this target based on the current
 236      processor state (e.g. the current instruction mode on ARM) and the
 237      PC.  The PCPTR is adjusted to the real memory location in case a flag
 238      (e.g., the Thumb bit on ARM) is present in the PC.  */
 239   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 240
 241   /* Returns true if the target can software single step.  */
 242   int (*supports_software_single_step) (void);
 243
 244   /* Return 1 if the target supports catch syscall, 0 (or leave the
 245      callback NULL) otherwise.  */
 246   int (*supports_catch_syscall) (void);
 247
 248   /* Return tdesc index for IPA.  */
 249   int (*get_ipa_tdesc_idx) (void);
 250
 251   /* Thread ID to (numeric) thread handle: Return true on success and
 252      false for failure.  Return pointer to thread handle via HANDLE
 253      and the handle's length via HANDLE_LEN.  */
 254   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 255
 256   /* The object that will gradually replace this struct.  */
 257   process_target *pt;
 258 };
 259
 260 class process_target
 261 {
 262 public:
 263
 264   virtual ~process_target () = default;
 265
 266   /* Start a new process.
 267
 268      PROGRAM is a path to the program to execute.
 269      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 270      to be passed to the inferior as ``argv'' (along with PROGRAM).
 271
 272      Returns the new PID on success, -1 on failure.  Registers the new
 273      process with the process list.  */
 274   virtual int create_inferior (const char *program,
 275                                const std::vector<char *> &program_args) = 0;
 276
 277   /* Do additional setup after a new process is created, including
 278      exec-wrapper completion.  */
 279   virtual void post_create_inferior ();
 280
 281   /* Attach to a running process.
 282
 283      PID is the process ID to attach to, specified by the user
 284      or a higher layer.
 285
 286      Returns -1 if attaching is unsupported, 0 on success, and calls
 287      error() otherwise.  */
 288   virtual int attach (unsigned long pid) = 0;
 289
 290   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 291   virtual int kill (process_info *proc) = 0;
 292
 293   /* Detach from process PROC.  Return -1 on failure, and 0 on
 294      success.  */
 295   virtual int detach (process_info *proc) = 0;
 296
 297   /* The inferior process has died.  Do what is right.  */
 298   virtual void mourn (process_info *proc) = 0;
 299
 300   /* Wait for process PID to exit.  */
 301   virtual void join (int pid) = 0;
 302
 303   /* Return true iff the thread with process ID PID is alive.  */
 304   virtual bool thread_alive (ptid_t pid) = 0;
 305
 306   /* Resume the inferior process.  */
 307   virtual void resume (thread_resume *resume_info, size_t n) = 0;
 308
 309   /* Wait for the inferior process or thread to change state.  Store
 310      status through argument pointer STATUS.
 311
 312      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 313      wait for any thread of process pid to do something.  Return ptid
 314      of child, or -1 in case of error; store status through argument
 315      pointer STATUS.  OPTIONS is a bit set of options defined as
 316      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 317      no child stop to report, return is
 318      null_ptid/TARGET_WAITKIND_IGNORE.  */
 319   virtual ptid_t wait (ptid_t ptid, target_waitstatus *status,
 320                        int options) = 0;
 321
 322   /* Fetch registers from the inferior process.
 323
 324      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 325   virtual void fetch_registers (regcache *regcache, int regno) = 0;
 326
 327   /* Store registers to the inferior process.
 328
 329      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 330   virtual void store_registers (regcache *regcache, int regno) = 0;
 331
 332   /* Prepare to read or write memory from the inferior process.
 333      Targets use this to do what is necessary to get the state of the
 334      inferior such that it is possible to access memory.
 335
 336      This should generally only be called from client facing routines,
 337      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 338      insertion routine.
 339
 340      Like `read_memory' and `write_memory' below, returns 0 on success
 341      and errno on failure.  */
 342   virtual int prepare_to_access_memory ();
 343
 344   /* Undo the effects of prepare_to_access_memory.  */
 345   virtual void done_accessing_memory ();
 346
 347   /* Read memory from the inferior process.  This should generally be
 348      called through read_inferior_memory, which handles breakpoint shadowing.
 349
 350      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 351
 352      Returns 0 on success and errno on failure.  */
 353   virtual int read_memory (CORE_ADDR memaddr, unsigned char *myaddr,
 354                            int len) = 0;
 355
 356   /* Write memory to the inferior process.  This should generally be
 357      called through target_write_memory, which handles breakpoint shadowing.
 358
 359      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 360
 361      Returns 0 on success and errno on failure.  */
 362   virtual int write_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 363                             int len) = 0;
 364
 365   /* Query GDB for the values of any symbols we're interested in.
 366      This function is called whenever we receive a "qSymbols::"
 367      query, which corresponds to every time more symbols (might)
 368      become available.  */
 369   virtual void look_up_symbols ();
 370
 371   /* Send an interrupt request to the inferior process,
 372      however is appropriate.  */
 373   virtual void request_interrupt () = 0;
 374
 375   /* Return true if the read_auxv target op is supported.  */
 376   virtual bool supports_read_auxv ();
 377
 378   /* Read auxiliary vector data from the inferior process.
 379
 380      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 381   virtual int read_auxv (CORE_ADDR offset, unsigned char *myaddr,
 382                          unsigned int len);
 383
 384   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 385      otherwise.  The type is coded as follows:
 386        '0' - software-breakpoint
 387        '1' - hardware-breakpoint
 388        '2' - write watchpoint
 389        '3' - read watchpoint
 390        '4' - access watchpoint
 391   */
 392   virtual bool supports_z_point_type (char z_type);
 393
 394   /* Insert and remove a break or watchpoint.
 395      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 396   virtual int insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
 397                             int size, raw_breakpoint *bp);
 398
 399   virtual int remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
 400                             int size, raw_breakpoint *bp);
 401
 402   /* Returns true if the target stopped because it executed a software
 403      breakpoint instruction, false otherwise.  */
 404   virtual bool stopped_by_sw_breakpoint ();
 405
 406   /* Returns true if the target knows whether a trap was caused by a
 407      SW breakpoint triggering.  */
 408   virtual bool supports_stopped_by_sw_breakpoint ();
 409
 410   /* Returns true if the target stopped for a hardware breakpoint.  */
 411   virtual bool stopped_by_hw_breakpoint ();
 412
 413   /* Returns true if the target knows whether a trap was caused by a
 414      HW breakpoint triggering.  */
 415   virtual bool supports_stopped_by_hw_breakpoint ();
 416
 417   /* Returns true if the target can do hardware single step.  */
 418   virtual bool supports_hardware_single_step ();
 419
 420   /* Returns true if target was stopped due to a watchpoint hit, false
 421      otherwise.  */
 422   virtual bool stopped_by_watchpoint ();
 423
 424   /* Returns the address associated with the watchpoint that hit, if any;
 425      returns 0 otherwise.  */
 426   virtual CORE_ADDR stopped_data_address ();
 427
 428   /* Return true if the read_offsets target op is supported.  */
 429   virtual bool supports_read_offsets ();
 430
 431   /* Reports the text, data offsets of the executable.  This is
 432      needed for uclinux where the executable is relocated during load
 433      time.  */
 434   virtual int read_offsets (CORE_ADDR *text, CORE_ADDR *data);
 435
 436   /* Return true if the get_tls_address target op is supported.  */
 437   virtual bool supports_get_tls_address ();
 438
 439   /* Fetch the address associated with a specific thread local storage
 440      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 441      Stores it in *ADDRESS and returns zero on success; otherwise returns
 442      an error code.  A return value of -1 means this system does not
 443      support the operation.  */
 444   virtual int get_tls_address (thread_info *thread, CORE_ADDR offset,
 445                                CORE_ADDR load_module, CORE_ADDR *address);
 446
 447   /* Fill BUF with an hostio error packet representing the last hostio
 448      error.  */
 449   virtual void hostio_last_error (char *buf);
 450
 451   /* Return true if the qxfer_osdata target op is supported.  */
 452   virtual bool supports_qxfer_osdata ();
 453
 454   /* Read/Write OS data using qXfer packets.  */
 455   virtual int qxfer_osdata (const char *annex, unsigned char *readbuf,
 456                             unsigned const char *writebuf,
 457                             CORE_ADDR offset, int len);
 458
 459   /* Return true if the qxfer_siginfo target op is supported.  */
 460   virtual bool supports_qxfer_siginfo ();
 461
 462   /* Read/Write extra signal info.  */
 463   virtual int qxfer_siginfo (const char *annex, unsigned char *readbuf,
 464                              unsigned const char *writebuf,
 465                              CORE_ADDR offset, int len);
 466
 467   /* Return true if non-stop mode is supported.  */
 468   virtual bool supports_non_stop ();
 469
 470   /* Enables async target events.  Returns the previous enable
 471      state.  */
 472   virtual bool async (bool enable);
 473
 474   /* Switch to non-stop (ENABLE == true) or all-stop (ENABLE == false)
 475      mode.  Return 0 on success, -1 otherwise.  */
 476   virtual int start_non_stop (bool enable);
 477
 478   /* Returns true if the target supports multi-process debugging.  */
 479   virtual bool supports_multi_process ();
 480
 481   /* Returns true if fork events are supported.  */
 482   virtual bool supports_fork_events ();
 483
 484   /* Returns true if vfork events are supported.  */
 485   virtual bool supports_vfork_events ();
 486
 487   /* Returns true if exec events are supported.  */
 488   virtual bool supports_exec_events ();
 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   do                                                     \
 517     {                                                    \
 518       if (the_target->handle_new_gdb_connection != NULL) \
 519         (*the_target->handle_new_gdb_connection) ();     \
 520     } while (0)
 521
 522 #define detach_inferior(proc) \
 523   the_target->pt->detach (proc)
 524
 525 #define mythread_alive(pid) \
 526   the_target->pt->thread_alive (pid)
 527
 528 #define fetch_inferior_registers(regcache, regno)       \
 529   the_target->pt->fetch_registers (regcache, regno)
 530
 531 #define store_inferior_registers(regcache, regno) \
 532   the_target->pt->store_registers (regcache, regno)
 533
 534 #define join_inferior(pid) \
 535   the_target->pt->join (pid)
 536
 537 #define target_supports_non_stop() \
 538   the_target->pt->supports_non_stop ()
 539
 540 #define target_async(enable) \
 541   the_target->pt->async (enable)
 542
 543 #define target_process_qsupported(features, count)      \
 544   do                                                    \
 545     {                                                   \
 546       if (the_target->process_qsupported)               \
 547         the_target->process_qsupported (features, count); \
 548     } while (0)
 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->supports_tracepoints                     \
 560    ? (*the_target->supports_tracepoints) () : 0)
 561
 562 #define target_supports_fast_tracepoints()              \
 563   (the_target->install_fast_tracepoint_jump_pad != NULL)
 564
 565 #define target_get_min_fast_tracepoint_insn_len()       \
 566   (the_target->get_min_fast_tracepoint_insn_len         \
 567    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 568
 569 #define thread_stopped(thread) \
 570   (*the_target->thread_stopped) (thread)
 571
 572 #define pause_all(freeze)                       \
 573   do                                            \
 574     {                                           \
 575       if (the_target->pause_all)                \
 576         (*the_target->pause_all) (freeze);      \
 577     } while (0)
 578
 579 #define unpause_all(unfreeze)                   \
 580   do                                            \
 581     {                                           \
 582       if (the_target->unpause_all)              \
 583         (*the_target->unpause_all) (unfreeze);  \
 584     } while (0)
 585
 586 #define stabilize_threads()                     \
 587   do                                            \
 588     {                                           \
 589       if (the_target->stabilize_threads)        \
 590         (*the_target->stabilize_threads) ();    \
 591     } while (0)
 592
 593 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 594                                          collector, lockaddr,           \
 595                                          orig_size,                     \
 596                                          jump_entry,                    \
 597                                          trampoline, trampoline_size,   \
 598                                          jjump_pad_insn,                \
 599                                          jjump_pad_insn_size,           \
 600                                          adjusted_insn_addr,            \
 601                                          adjusted_insn_addr_end,        \
 602                                          err)                           \
 603   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 604                                                    collector,lockaddr,  \
 605                                                    orig_size, jump_entry, \
 606                                                    trampoline,          \
 607                                                    trampoline_size,     \
 608                                                    jjump_pad_insn,      \
 609                                                    jjump_pad_insn_size, \
 610                                                    adjusted_insn_addr,  \
 611                                                    adjusted_insn_addr_end, \
 612                                                    err)
 613
 614 #define target_emit_ops() \
 615   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 616
 617 #define target_supports_disable_randomization() \
 618   (the_target->supports_disable_randomization ? \
 619    (*the_target->supports_disable_randomization) () : 0)
 620
 621 #define target_supports_agent() \
 622   (the_target->supports_agent ? \
 623    (*the_target->supports_agent) () : 0)
 624
 625 static inline struct btrace_target_info *
 626 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 627 {
 628   if (the_target->enable_btrace == nullptr)
 629     error (_("Target does not support branch tracing."));
 630
 631   return (*the_target->enable_btrace) (ptid, conf);
 632 }
 633
 634 static inline int
 635 target_disable_btrace (struct btrace_target_info *tinfo)
 636 {
 637   if (the_target->disable_btrace == nullptr)
 638     error (_("Target does not support branch tracing."));
 639
 640   return (*the_target->disable_btrace) (tinfo);
 641 }
 642
 643 static inline int
 644 target_read_btrace (struct btrace_target_info *tinfo,
 645                     struct buffer *buffer,
 646                     enum btrace_read_type type)
 647 {
 648   if (the_target->read_btrace == nullptr)
 649     error (_("Target does not support branch tracing."));
 650
 651   return (*the_target->read_btrace) (tinfo, buffer, type);
 652 }
 653
 654 static inline int
 655 target_read_btrace_conf (struct btrace_target_info *tinfo,
 656                          struct buffer *buffer)
 657 {
 658   if (the_target->read_btrace_conf == nullptr)
 659     error (_("Target does not support branch tracing."));
 660
 661   return (*the_target->read_btrace_conf) (tinfo, buffer);
 662 }
 663
 664 #define target_supports_range_stepping() \
 665   (the_target->supports_range_stepping ? \
 666    (*the_target->supports_range_stepping) () : 0)
 667
 668 #define target_supports_stopped_by_sw_breakpoint() \
 669   the_target->pt->supports_stopped_by_sw_breakpoint ()
 670
 671 #define target_stopped_by_sw_breakpoint() \
 672   the_target->pt->stopped_by_sw_breakpoint ()
 673
 674 #define target_supports_stopped_by_hw_breakpoint() \
 675   the_target->pt->supports_stopped_by_hw_breakpoint ()
 676
 677 #define target_supports_hardware_single_step() \
 678   the_target->pt->supports_hardware_single_step ()
 679
 680 #define target_stopped_by_hw_breakpoint() \
 681   the_target->pt->stopped_by_hw_breakpoint ()
 682
 683 #define target_breakpoint_kind_from_pc(pcptr) \
 684   (the_target->breakpoint_kind_from_pc \
 685    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 686    : default_breakpoint_kind_from_pc (pcptr))
 687
 688 #define target_breakpoint_kind_from_current_state(pcptr) \
 689   (the_target->breakpoint_kind_from_current_state \
 690    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 691    : target_breakpoint_kind_from_pc (pcptr))
 692
 693 #define target_supports_software_single_step() \
 694   (the_target->supports_software_single_step ? \
 695    (*the_target->supports_software_single_step) () : 0)
 696
 697 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 698                int connected_wait);
 699
 700 /* Prepare to read or write memory from the inferior process.  See the
 701    corresponding process_stratum_target methods for more details.  */
 702
 703 int prepare_to_access_memory (void);
 704 void done_accessing_memory (void);
 705
 706 #define target_core_of_thread(ptid)             \
 707   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 708    : -1)
 709
 710 #define target_thread_name(ptid)                                \
 711   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 712    : NULL)
 713
 714 #define target_thread_handle(ptid, handle, handle_len) \
 715    (the_target->thread_handle ? (*the_target->thread_handle) \
 716                                   (ptid, handle, handle_len) \
 717    : false)
 718
 719 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 720
 721 int set_desired_thread ();
 722
 723 const char *target_pid_to_str (ptid_t);
 724
 725 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 726
 727 #endif /* GDBSERVER_TARGET_H */