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