gdbserver/target.h

   1 /* Target operations for the remote server for GDB.
   2    Copyright (C) 2002-2020 Free Software Foundation, Inc.
   3
   4    Contributed by MontaVista Software.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GDBSERVER_TARGET_H
  22 #define GDBSERVER_TARGET_H
  23
  24 #include <sys/types.h> /* for mode_t */
  25 #include "target/target.h"
  26 #include "target/resume.h"
  27 #include "target/wait.h"
  28 #include "target/waitstatus.h"
  29 #include "mem-break.h"
  30 #include "gdbsupport/btrace-common.h"
  31 #include <vector>
  32
  33 struct emit_ops;
  34 struct buffer;
  35 struct process_info;
  36
  37 /* This structure describes how to resume a particular thread (or all
  38    threads) based on the client's request.  If thread is -1, then this
  39    entry applies to all threads.  These are passed around as an
  40    array.  */
  41
  42 struct thread_resume
  43 {
  44   ptid_t thread;
  45
  46   /* How to "resume".  */
  47   enum resume_kind kind;
  48
  49   /* If non-zero, send this signal when we resume, or to stop the
  50      thread.  If stopping a thread, and this is 0, the target should
  51      stop the thread however it best decides to (e.g., SIGSTOP on
  52      linux; SuspendThread on win32).  This is a host signal value (not
  53      enum gdb_signal).  */
  54   int sig;
  55
  56   /* Range to single step within.  Valid only iff KIND is resume_step.
  57
  58      Single-step once, and then continuing stepping as long as the
  59      thread stops in this range.  (If the range is empty
  60      [STEP_RANGE_START == STEP_RANGE_END], then this is a single-step
  61      request.)  */
  62   CORE_ADDR step_range_start;   /* Inclusive */
  63   CORE_ADDR step_range_end;     /* Exclusive */
  64 };
  65
  66 class process_target;
  67
  68 /* GDBserver doesn't have a concept of strata like GDB, but we call
  69    its target vector "process_stratum" anyway for the benefit of
  70    shared code.  */
  71 struct process_stratum_target
  72 {
  73   /* Read/Write OS data using qXfer packets.  */
  74   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
  75                        unsigned const char *writebuf, CORE_ADDR offset,
  76                        int len);
  77
  78   /* Read/Write extra signal info.  */
  79   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
  80                         unsigned const char *writebuf,
  81                         CORE_ADDR offset, int len);
  82
  83   int (*supports_non_stop) (void);
  84
  85   /* Enables async target events.  Returns the previous enable
  86      state.  */
  87   int (*async) (int enable);
  88
  89   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
  90      success, -1 otherwise.  */
  91   int (*start_non_stop) (int);
  92
  93   /* Returns true if the target supports multi-process debugging.  */
  94   int (*supports_multi_process) (void);
  95
  96   /* Returns true if fork events are supported.  */
  97   int (*supports_fork_events) (void);
  98
  99   /* Returns true if vfork events are supported.  */
 100   int (*supports_vfork_events) (void);
 101
 102   /* Returns true if exec events are supported.  */
 103   int (*supports_exec_events) (void);
 104
 105   /* Allows target to re-initialize connection-specific settings.  */
 106   void (*handle_new_gdb_connection) (void);
 107
 108   /* If not NULL, target-specific routine to process monitor command.
 109      Returns 1 if handled, or 0 to perform default processing.  */
 110   int (*handle_monitor_command) (char *);
 111
 112   /* Returns the core given a thread, or -1 if not known.  */
 113   int (*core_of_thread) (ptid_t);
 114
 115   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 116   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 117                        unsigned char *myaddr, unsigned int len);
 118
 119   /* Target specific qSupported support.  FEATURES is an array of
 120      features with COUNT elements.  */
 121   void (*process_qsupported) (char **features, int count);
 122
 123   /* Return 1 if the target supports tracepoints, 0 (or leave the
 124      callback NULL) otherwise.  */
 125   int (*supports_tracepoints) (void);
 126
 127   /* Read PC from REGCACHE.  */
 128   CORE_ADDR (*read_pc) (struct regcache *regcache);
 129
 130   /* Write PC to REGCACHE.  */
 131   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 132
 133   /* Return true if THREAD is known to be stopped now.  */
 134   int (*thread_stopped) (struct thread_info *thread);
 135
 136   /* Read Thread Information Block address.  */
 137   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 138
 139   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 140      be ignored until an unpause_all call unfreezes threads again.
 141      There can be nested calls to pause_all, so a freeze counter
 142      should be maintained.  */
 143   void (*pause_all) (int freeze);
 144
 145   /* Unpause all threads.  Threads that hadn't been resumed by the
 146      client should be left stopped.  Basically a pause/unpause call
 147      pair should not end up resuming threads that were stopped before
 148      the pause call.  */
 149   void (*unpause_all) (int unfreeze);
 150
 151   /* Stabilize all threads.  That is, force them out of jump pads.  */
 152   void (*stabilize_threads) (void);
 153
 154   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 155      tracepoint internal object as used by the IPA agent.  TPADDR is
 156      the address of tracepoint.  COLLECTOR is address of the function
 157      the jump pad redirects to.  LOCKADDR is the address of the jump
 158      pad lock object.  ORIG_SIZE is the size in bytes of the
 159      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 160      jump pad entry, and on return holds the address past the end of
 161      the created jump pad.  If a trampoline is created by the function,
 162      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 163      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 164      buffer containing a copy of the instruction at TPADDR.
 165      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 166      return the address range where the instruction at TPADDR was relocated
 167      to.  If an error occurs, the ERR may be used to pass on an error
 168      message.  */
 169   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 170                                            CORE_ADDR collector,
 171                                            CORE_ADDR lockaddr,
 172                                            ULONGEST orig_size,
 173                                            CORE_ADDR *jump_entry,
 174                                            CORE_ADDR *trampoline,
 175                                            ULONGEST *trampoline_size,
 176                                            unsigned char *jjump_pad_insn,
 177                                            ULONGEST *jjump_pad_insn_size,
 178                                            CORE_ADDR *adjusted_insn_addr,
 179                                            CORE_ADDR *adjusted_insn_addr_end,
 180                                            char *err);
 181
 182   /* Return the bytecode operations vector for the current inferior.
 183      Returns NULL if bytecode compilation is not supported.  */
 184   struct emit_ops *(*emit_ops) (void);
 185
 186   /* Returns true if the target supports disabling randomization.  */
 187   int (*supports_disable_randomization) (void);
 188
 189   /* Return the minimum length of an instruction that can be safely overwritten
 190      for use as a fast tracepoint.  */
 191   int (*get_min_fast_tracepoint_insn_len) (void);
 192
 193   /* Read solib info on SVR4 platforms.  */
 194   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 195                                unsigned const char *writebuf,
 196                                CORE_ADDR offset, int len);
 197
 198   /* Return true if target supports debugging agent.  */
 199   int (*supports_agent) (void);
 200
 201   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 202      target information struct for reading and for disabling branch trace.  */
 203   struct btrace_target_info *(*enable_btrace)
 204     (ptid_t ptid, const struct btrace_config *conf);
 205
 206   /* Disable branch tracing.
 207      Returns zero on success, non-zero otherwise.  */
 208   int (*disable_btrace) (struct btrace_target_info *tinfo);
 209
 210   /* Read branch trace data into buffer.
 211      Return 0 on success; print an error message into BUFFER and return -1,
 212      otherwise.  */
 213   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 214                       enum btrace_read_type type);
 215
 216   /* Read the branch trace configuration into BUFFER.
 217      Return 0 on success; print an error message into BUFFER and return -1
 218      otherwise.  */
 219   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 220
 221   /* Return true if target supports range stepping.  */
 222   int (*supports_range_stepping) (void);
 223
 224   /* Return the full absolute name of the executable file that was
 225      run to create the process PID.  If the executable file cannot
 226      be determined, NULL is returned.  Otherwise, a pointer to a
 227      character string containing the pathname is returned.  This
 228      string should be copied into a buffer by the client if the string
 229      will not be immediately used, or if it must persist.  */
 230   char *(*pid_to_exec_file) (int pid);
 231
 232   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 233      the filesystem as it appears to process PID.  Systems where all
 234      processes share a common filesystem should set this to NULL.
 235      If NULL, the caller should fall back to open(2).  */
 236   int (*multifs_open) (int pid, const char *filename,
 237                        int flags, mode_t mode);
 238
 239   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 240      in the filesystem as it appears to process PID.  Systems where
 241      all processes share a common filesystem should set this to NULL.
 242      If NULL, the caller should fall back to unlink(2).  */
 243   int (*multifs_unlink) (int pid, const char *filename);
 244
 245   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 246      operating in the filesystem as it appears to process PID.
 247      Systems where all processes share a common filesystem should
 248      set this to NULL.  If NULL, the caller should fall back to
 249      readlink(2).  */
 250   ssize_t (*multifs_readlink) (int pid, const char *filename,
 251                                char *buf, size_t bufsiz);
 252
 253   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 254      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 255      ARM) was present in the PC.  */
 256   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 257
 258   /* Return the software breakpoint from KIND.  KIND can have target
 259      specific meaning like the Z0 kind parameter.
 260      SIZE is set to the software breakpoint's length in memory.  */
 261   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 262
 263   /* Return the thread's name, or NULL if the target is unable to determine it.
 264      The returned value must not be freed by the caller.  */
 265   const char *(*thread_name) (ptid_t thread);
 266
 267   /* Return the breakpoint kind for this target based on the current
 268      processor state (e.g. the current instruction mode on ARM) and the
 269      PC.  The PCPTR is adjusted to the real memory location in case a flag
 270      (e.g., the Thumb bit on ARM) is present in the PC.  */
 271   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 272
 273   /* Returns true if the target can software single step.  */
 274   int (*supports_software_single_step) (void);
 275
 276   /* Return 1 if the target supports catch syscall, 0 (or leave the
 277      callback NULL) otherwise.  */
 278   int (*supports_catch_syscall) (void);
 279
 280   /* Return tdesc index for IPA.  */
 281   int (*get_ipa_tdesc_idx) (void);
 282
 283   /* Thread ID to (numeric) thread handle: Return true on success and
 284      false for failure.  Return pointer to thread handle via HANDLE
 285      and the handle's length via HANDLE_LEN.  */
 286   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 287
 288   /* The object that will gradually replace this struct.  */
 289   process_target *pt;
 290 };
 291
 292 class process_target
 293 {
 294 public:
 295
 296   virtual ~process_target () = default;
 297
 298   /* Start a new process.
 299
 300      PROGRAM is a path to the program to execute.
 301      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 302      to be passed to the inferior as ``argv'' (along with PROGRAM).
 303
 304      Returns the new PID on success, -1 on failure.  Registers the new
 305      process with the process list.  */
 306   virtual int create_inferior (const char *program,
 307                                const std::vector<char *> &program_args) = 0;
 308
 309   /* Do additional setup after a new process is created, including
 310      exec-wrapper completion.  */
 311   virtual void post_create_inferior ();
 312
 313   /* Attach to a running process.
 314
 315      PID is the process ID to attach to, specified by the user
 316      or a higher layer.
 317
 318      Returns -1 if attaching is unsupported, 0 on success, and calls
 319      error() otherwise.  */
 320   virtual int attach (unsigned long pid) = 0;
 321
 322   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 323   virtual int kill (process_info *proc) = 0;
 324
 325   /* Detach from process PROC.  Return -1 on failure, and 0 on
 326      success.  */
 327   virtual int detach (process_info *proc) = 0;
 328
 329   /* The inferior process has died.  Do what is right.  */
 330   virtual void mourn (process_info *proc) = 0;
 331
 332   /* Wait for process PID to exit.  */
 333   virtual void join (int pid) = 0;
 334
 335   /* Return true iff the thread with process ID PID is alive.  */
 336   virtual bool thread_alive (ptid_t pid) = 0;
 337
 338   /* Resume the inferior process.  */
 339   virtual void resume (thread_resume *resume_info, size_t n) = 0;
 340
 341   /* Wait for the inferior process or thread to change state.  Store
 342      status through argument pointer STATUS.
 343
 344      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 345      wait for any thread of process pid to do something.  Return ptid
 346      of child, or -1 in case of error; store status through argument
 347      pointer STATUS.  OPTIONS is a bit set of options defined as
 348      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 349      no child stop to report, return is
 350      null_ptid/TARGET_WAITKIND_IGNORE.  */
 351   virtual ptid_t wait (ptid_t ptid, target_waitstatus *status,
 352                        int options) = 0;
 353
 354   /* Fetch registers from the inferior process.
 355
 356      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 357   virtual void fetch_registers (regcache *regcache, int regno) = 0;
 358
 359   /* Store registers to the inferior process.
 360
 361      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 362   virtual void store_registers (regcache *regcache, int regno) = 0;
 363
 364   /* Prepare to read or write memory from the inferior process.
 365      Targets use this to do what is necessary to get the state of the
 366      inferior such that it is possible to access memory.
 367
 368      This should generally only be called from client facing routines,
 369      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 370      insertion routine.
 371
 372      Like `read_memory' and `write_memory' below, returns 0 on success
 373      and errno on failure.  */
 374   virtual int prepare_to_access_memory ();
 375
 376   /* Undo the effects of prepare_to_access_memory.  */
 377   virtual void done_accessing_memory ();
 378
 379   /* Read memory from the inferior process.  This should generally be
 380      called through read_inferior_memory, which handles breakpoint shadowing.
 381
 382      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 383
 384      Returns 0 on success and errno on failure.  */
 385   virtual int read_memory (CORE_ADDR memaddr, unsigned char *myaddr,
 386                            int len) = 0;
 387
 388   /* Write memory to the inferior process.  This should generally be
 389      called through target_write_memory, which handles breakpoint shadowing.
 390
 391      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 392
 393      Returns 0 on success and errno on failure.  */
 394   virtual int write_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 395                             int len) = 0;
 396
 397   /* Query GDB for the values of any symbols we're interested in.
 398      This function is called whenever we receive a "qSymbols::"
 399      query, which corresponds to every time more symbols (might)
 400      become available.  */
 401   virtual void look_up_symbols ();
 402
 403   /* Send an interrupt request to the inferior process,
 404      however is appropriate.  */
 405   virtual void request_interrupt () = 0;
 406
 407   /* Return true if the read_auxv target op is supported.  */
 408   virtual bool supports_read_auxv ();
 409
 410   /* Read auxiliary vector data from the inferior process.
 411
 412      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 413   virtual int read_auxv (CORE_ADDR offset, unsigned char *myaddr,
 414                          unsigned int len);
 415
 416   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 417      otherwise.  The type is coded as follows:
 418        '0' - software-breakpoint
 419        '1' - hardware-breakpoint
 420        '2' - write watchpoint
 421        '3' - read watchpoint
 422        '4' - access watchpoint
 423   */
 424   virtual bool supports_z_point_type (char z_type);
 425
 426   /* Insert and remove a break or watchpoint.
 427      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 428   virtual int insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
 429                             int size, raw_breakpoint *bp);
 430
 431   virtual int remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
 432                             int size, raw_breakpoint *bp);
 433
 434   /* Returns true if the target stopped because it executed a software
 435      breakpoint instruction, false otherwise.  */
 436   virtual bool stopped_by_sw_breakpoint ();
 437
 438   /* Returns true if the target knows whether a trap was caused by a
 439      SW breakpoint triggering.  */
 440   virtual bool supports_stopped_by_sw_breakpoint ();
 441
 442   /* Returns true if the target stopped for a hardware breakpoint.  */
 443   virtual bool stopped_by_hw_breakpoint ();
 444
 445   /* Returns true if the target knows whether a trap was caused by a
 446      HW breakpoint triggering.  */
 447   virtual bool supports_stopped_by_hw_breakpoint ();
 448
 449   /* Returns true if the target can do hardware single step.  */
 450   virtual bool supports_hardware_single_step ();
 451
 452   /* Returns true if target was stopped due to a watchpoint hit, false
 453      otherwise.  */
 454   virtual bool stopped_by_watchpoint ();
 455
 456   /* Returns the address associated with the watchpoint that hit, if any;
 457      returns 0 otherwise.  */
 458   virtual CORE_ADDR stopped_data_address ();
 459
 460   /* Return true if the read_offsets target op is supported.  */
 461   virtual bool supports_read_offsets ();
 462
 463   /* Reports the text, data offsets of the executable.  This is
 464      needed for uclinux where the executable is relocated during load
 465      time.  */
 466   virtual int read_offsets (CORE_ADDR *text, CORE_ADDR *data);
 467
 468   /* Return true if the get_tls_address target op is supported.  */
 469   virtual bool supports_get_tls_address ();
 470
 471   /* Fetch the address associated with a specific thread local storage
 472      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 473      Stores it in *ADDRESS and returns zero on success; otherwise returns
 474      an error code.  A return value of -1 means this system does not
 475      support the operation.  */
 476   virtual int get_tls_address (thread_info *thread, CORE_ADDR offset,
 477                                CORE_ADDR load_module, CORE_ADDR *address);
 478
 479   /* Fill BUF with an hostio error packet representing the last hostio
 480      error.  */
 481   virtual void hostio_last_error (char *buf);
 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 */