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