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