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