gdbserver/target.h

   1 /* Target operations for the remote server for GDB.
   2    Copyright (C) 2002-2023 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>
  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/array-view.h"
  31 #include "gdbsupport/btrace-common.h"
  32 #include <vector>
  33 #include "gdbsupport/byte-vector.h"
  34
  35 struct emit_ops;
  36 struct process_info;
  37
  38 /* This structure describes how to resume a particular thread (or all
  39    threads) based on the client's request.  If thread is -1, then this
  40    entry applies to all threads.  These are passed around as an
  41    array.  */
  42
  43 struct thread_resume
  44 {
  45   ptid_t thread;
  46
  47   /* How to "resume".  */
  48   enum resume_kind kind;
  49
  50   /* If non-zero, send this signal when we resume, or to stop the
  51      thread.  If stopping a thread, and this is 0, the target should
  52      stop the thread however it best decides to (e.g., SIGSTOP on
  53      linux; SuspendThread on win32).  This is a host signal value (not
  54      enum gdb_signal).  */
  55   int sig;
  56
  57   /* Range to single step within.  Valid only iff KIND is resume_step.
  58
  59      Single-step once, and then continuing stepping as long as the
  60      thread stops in this range.  (If the range is empty
  61      [STEP_RANGE_START == STEP_RANGE_END], then this is a single-step
  62      request.)  */
  63   CORE_ADDR step_range_start;   /* Inclusive */
  64   CORE_ADDR step_range_end;     /* Exclusive */
  65 };
  66
  67 /* GDBserver doesn't have a concept of strata like GDB, but we call
  68    its target vector "process_stratum" anyway for the benefit of
  69    shared code.  */
  70
  71 class process_stratum_target
  72 {
  73 public:
  74
  75   virtual ~process_stratum_target () = default;
  76
  77   /* Start a new process.
  78
  79      PROGRAM is a path to the program to execute.
  80      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
  81      to be passed to the inferior as ``argv'' (along with PROGRAM).
  82
  83      Returns the new PID on success, -1 on failure.  Registers the new
  84      process with the process list.  */
  85   virtual int create_inferior (const char *program,
  86                                const std::vector<char *> &program_args) = 0;
  87
  88   /* Do additional setup after a new process is created, including
  89      exec-wrapper completion.  */
  90   virtual void post_create_inferior ();
  91
  92   /* Attach to a running process.
  93
  94      PID is the process ID to attach to, specified by the user
  95      or a higher layer.
  96
  97      Returns -1 if attaching is unsupported, 0 on success, and calls
  98      error() otherwise.  */
  99   virtual int attach (unsigned long pid) = 0;
 100
 101   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 102   virtual int kill (process_info *proc) = 0;
 103
 104   /* Detach from process PROC.  Return -1 on failure, and 0 on
 105      success.  */
 106   virtual int detach (process_info *proc) = 0;
 107
 108   /* The inferior process has died.  Do what is right.  */
 109   virtual void mourn (process_info *proc) = 0;
 110
 111   /* Wait for process PID to exit.  */
 112   virtual void join (int pid) = 0;
 113
 114   /* Return true iff the thread with process ID PID is alive.  */
 115   virtual bool thread_alive (ptid_t pid) = 0;
 116
 117   /* Resume the inferior process.  */
 118   virtual void resume (thread_resume *resume_info, size_t n) = 0;
 119
 120   /* Wait for the inferior process or thread to change state.  Store
 121      status through argument pointer STATUS.
 122
 123      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 124      wait for any thread of process pid to do something.  Return ptid
 125      of child, or -1 in case of error; store status through argument
 126      pointer STATUS.  OPTIONS is a bit set of options defined as
 127      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 128      no child stop to report, return is
 129      null_ptid/TARGET_WAITKIND_IGNORE.  */
 130   virtual ptid_t wait (ptid_t ptid, target_waitstatus *status,
 131                        target_wait_flags options) = 0;
 132
 133   /* Fetch registers from the inferior process.
 134
 135      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 136   virtual void fetch_registers (regcache *regcache, int regno) = 0;
 137
 138   /* Store registers to the inferior process.
 139
 140      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 141   virtual void store_registers (regcache *regcache, int regno) = 0;
 142
 143   /* Read memory from the inferior process.  This should generally be
 144      called through read_inferior_memory, which handles breakpoint shadowing.
 145
 146      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 147
 148      Returns 0 on success and errno on failure.  */
 149   virtual int read_memory (CORE_ADDR memaddr, unsigned char *myaddr,
 150                            int len) = 0;
 151
 152   /* Write memory to the inferior process.  This should generally be
 153      called through target_write_memory, which handles breakpoint shadowing.
 154
 155      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 156
 157      Returns 0 on success and errno on failure.  */
 158   virtual int write_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 159                             int len) = 0;
 160
 161   /* Query GDB for the values of any symbols we're interested in.
 162      This function is called whenever we receive a "qSymbols::"
 163      query, which corresponds to every time more symbols (might)
 164      become available.  */
 165   virtual void look_up_symbols ();
 166
 167   /* Send an interrupt request to the inferior process,
 168      however is appropriate.  */
 169   virtual void request_interrupt () = 0;
 170
 171   /* Return true if the read_auxv target op is supported.  */
 172   virtual bool supports_read_auxv ();
 173
 174   /* Read auxiliary vector data from the process with pid PID.
 175
 176      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 177   virtual int read_auxv (int pid, CORE_ADDR offset, unsigned char *myaddr,
 178                          unsigned int len);
 179
 180   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 181      otherwise.  The type is coded as follows:
 182        '0' - software-breakpoint
 183        '1' - hardware-breakpoint
 184        '2' - write watchpoint
 185        '3' - read watchpoint
 186        '4' - access watchpoint
 187   */
 188   virtual bool supports_z_point_type (char z_type);
 189
 190   /* Insert and remove a break or watchpoint.
 191      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 192   virtual int insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
 193                             int size, raw_breakpoint *bp);
 194
 195   virtual int remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
 196                             int size, raw_breakpoint *bp);
 197
 198   /* Returns true if the target stopped because it executed a software
 199      breakpoint instruction, false otherwise.  */
 200   virtual bool stopped_by_sw_breakpoint ();
 201
 202   /* Returns true if the target knows whether a trap was caused by a
 203      SW breakpoint triggering.  */
 204   virtual bool supports_stopped_by_sw_breakpoint ();
 205
 206   /* Returns true if the target stopped for a hardware breakpoint.  */
 207   virtual bool stopped_by_hw_breakpoint ();
 208
 209   /* Returns true if the target knows whether a trap was caused by a
 210      HW breakpoint triggering.  */
 211   virtual bool supports_stopped_by_hw_breakpoint ();
 212
 213   /* Returns true if the target can do hardware single step.  */
 214   virtual bool supports_hardware_single_step ();
 215
 216   /* Returns true if target was stopped due to a watchpoint hit, false
 217      otherwise.  */
 218   virtual bool stopped_by_watchpoint ();
 219
 220   /* Returns the address associated with the watchpoint that hit, if any;
 221      returns 0 otherwise.  */
 222   virtual CORE_ADDR stopped_data_address ();
 223
 224   /* Return true if the read_offsets target op is supported.  */
 225   virtual bool supports_read_offsets ();
 226
 227   /* Reports the text, data offsets of the executable.  This is
 228      needed for uclinux where the executable is relocated during load
 229      time.  */
 230   virtual int read_offsets (CORE_ADDR *text, CORE_ADDR *data);
 231
 232   /* Return true if the get_tls_address target op is supported.  */
 233   virtual bool supports_get_tls_address ();
 234
 235   /* Fetch the address associated with a specific thread local storage
 236      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 237      Stores it in *ADDRESS and returns zero on success; otherwise returns
 238      an error code.  A return value of -1 means this system does not
 239      support the operation.  */
 240   virtual int get_tls_address (thread_info *thread, CORE_ADDR offset,
 241                                CORE_ADDR load_module, CORE_ADDR *address);
 242
 243   /* Return true if the qxfer_osdata target op is supported.  */
 244   virtual bool supports_qxfer_osdata ();
 245
 246   /* Read/Write OS data using qXfer packets.  */
 247   virtual int qxfer_osdata (const char *annex, unsigned char *readbuf,
 248                             unsigned const char *writebuf,
 249                             CORE_ADDR offset, int len);
 250
 251   /* Return true if the qxfer_siginfo target op is supported.  */
 252   virtual bool supports_qxfer_siginfo ();
 253
 254   /* Read/Write extra signal info.  */
 255   virtual int qxfer_siginfo (const char *annex, unsigned char *readbuf,
 256                              unsigned const char *writebuf,
 257                              CORE_ADDR offset, int len);
 258
 259   /* Return true if non-stop mode is supported.  */
 260   virtual bool supports_non_stop ();
 261
 262   /* Enables async target events.  Returns the previous enable
 263      state.  */
 264   virtual bool async (bool enable);
 265
 266   /* Switch to non-stop (ENABLE == true) or all-stop (ENABLE == false)
 267      mode.  Return 0 on success, -1 otherwise.  */
 268   virtual int start_non_stop (bool enable);
 269
 270   /* Returns true if the target supports multi-process debugging.  */
 271   virtual bool supports_multi_process ();
 272
 273   /* Returns true if fork events are supported.  */
 274   virtual bool supports_fork_events ();
 275
 276   /* Returns true if vfork events are supported.  */
 277   virtual bool supports_vfork_events ();
 278
 279   /* Returns the set of supported thread options.  */
 280   virtual gdb_thread_options supported_thread_options ();
 281
 282   /* Returns true if exec events are supported.  */
 283   virtual bool supports_exec_events ();
 284
 285   /* Allows target to re-initialize connection-specific settings.  */
 286   virtual void handle_new_gdb_connection ();
 287
 288   /* The target-specific routine to process monitor command.
 289      Returns 1 if handled, or 0 to perform default processing.  */
 290   virtual int handle_monitor_command (char *mon);
 291
 292   /* Returns the core given a thread, or -1 if not known.  */
 293   virtual int core_of_thread (ptid_t ptid);
 294
 295   /* Returns true if the read_loadmap target op is supported.  */
 296   virtual bool supports_read_loadmap ();
 297
 298   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 299   virtual int read_loadmap (const char *annex, CORE_ADDR offset,
 300                             unsigned char *myaddr, unsigned int len);
 301
 302   /* Target specific qSupported support.  FEATURES is an array of
 303      features unsupported by the core of GDBserver.  */
 304   virtual void process_qsupported
 305     (gdb::array_view<const char * const> features);
 306
 307   /* Return true if the target supports tracepoints, false otherwise.  */
 308   virtual bool supports_tracepoints ();
 309
 310   /* Read PC from REGCACHE.  */
 311   virtual CORE_ADDR read_pc (regcache *regcache);
 312
 313   /* Write PC to REGCACHE.  */
 314   virtual void write_pc (regcache *regcache, CORE_ADDR pc);
 315
 316   /* Return true if the thread_stopped op is supported.  */
 317   virtual bool supports_thread_stopped ();
 318
 319   /* Return true if THREAD is known to be stopped now.  */
 320   virtual bool thread_stopped (thread_info *thread);
 321
 322   /* Return true if any thread is known to be resumed.  */
 323   virtual bool any_resumed ();
 324
 325   /* Return true if the get_tib_address op is supported.  */
 326   virtual bool supports_get_tib_address ();
 327
 328   /* Read Thread Information Block address.  */
 329   virtual int get_tib_address (ptid_t ptid, CORE_ADDR *address);
 330
 331   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 332      be ignored until an unpause_all call unfreezes threads again.
 333      There can be nested calls to pause_all, so a freeze counter
 334      should be maintained.  */
 335   virtual void pause_all (bool freeze);
 336
 337   /* Unpause all threads.  Threads that hadn't been resumed by the
 338      client should be left stopped.  Basically a pause/unpause call
 339      pair should not end up resuming threads that were stopped before
 340      the pause call.  */
 341   virtual void unpause_all (bool unfreeze);
 342
 343   /* Stabilize all threads.  That is, force them out of jump pads.  */
 344   virtual void stabilize_threads ();
 345
 346   /* Return true if the install_fast_tracepoint_jump_pad op is
 347      supported.  */
 348   virtual bool supports_fast_tracepoints ();
 349
 350   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 351      tracepoint internal object as used by the IPA agent.  TPADDR is
 352      the address of tracepoint.  COLLECTOR is address of the function
 353      the jump pad redirects to.  LOCKADDR is the address of the jump
 354      pad lock object.  ORIG_SIZE is the size in bytes of the
 355      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 356      jump pad entry, and on return holds the address past the end of
 357      the created jump pad.  If a trampoline is created by the function,
 358      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 359      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 360      buffer containing a copy of the instruction at TPADDR.
 361      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 362      return the address range where the instruction at TPADDR was relocated
 363      to.  If an error occurs, the ERR may be used to pass on an error
 364      message.  */
 365   virtual int install_fast_tracepoint_jump_pad
 366     (CORE_ADDR tpoint, CORE_ADDR tpaddr, CORE_ADDR collector,
 367      CORE_ADDR lockaddr, ULONGEST orig_size, CORE_ADDR *jump_entry,
 368      CORE_ADDR *trampoline, ULONGEST *trampoline_size,
 369      unsigned char *jjump_pad_insn, ULONGEST *jjump_pad_insn_size,
 370      CORE_ADDR *adjusted_insn_addr, CORE_ADDR *adjusted_insn_addr_end,
 371      char *err);
 372
 373   /* Return the minimum length of an instruction that can be safely
 374      overwritten for use as a fast tracepoint.  */
 375   virtual int get_min_fast_tracepoint_insn_len ();
 376
 377   /* Return the bytecode operations vector for the current inferior.
 378      Returns nullptr if bytecode compilation is not supported.  */
 379   virtual struct emit_ops *emit_ops ();
 380
 381   /* Returns true if the target supports disabling randomization.  */
 382   virtual bool supports_disable_randomization ();
 383
 384   /* Return true if the qxfer_libraries_svr4 op is supported.  */
 385   virtual bool supports_qxfer_libraries_svr4 ();
 386
 387   /* Read solib info on SVR4 platforms.  */
 388   virtual int qxfer_libraries_svr4 (const char *annex,
 389                                     unsigned char *readbuf,
 390                                     unsigned const char *writebuf,
 391                                     CORE_ADDR offset, int len);
 392
 393   /* Return true if target supports debugging agent.  */
 394   virtual bool supports_agent ();
 395
 396   /* Return true if target supports btrace.  */
 397   virtual bool supports_btrace ();
 398
 399   /* Enable branch tracing for TP based on CONF and allocate a branch trace
 400      target information struct for reading and for disabling branch trace.  */
 401   virtual btrace_target_info *enable_btrace (thread_info *tp,
 402                                              const btrace_config *conf);
 403
 404   /* Disable branch tracing.
 405      Returns zero on success, non-zero otherwise.  */
 406   virtual int disable_btrace (btrace_target_info *tinfo);
 407
 408   /* Read branch trace data into buffer.
 409      Return 0 on success; print an error message into BUFFER and return -1,
 410      otherwise.  */
 411   virtual int read_btrace (btrace_target_info *tinfo, std::string *buf,
 412                            enum btrace_read_type type);
 413
 414   /* Read the branch trace configuration into BUFFER.
 415      Return 0 on success; print an error message into BUFFER and return -1
 416      otherwise.  */
 417   virtual int read_btrace_conf (const btrace_target_info *tinfo,
 418                                 std::string *buf);
 419
 420   /* Return true if target supports range stepping.  */
 421   virtual bool supports_range_stepping ();
 422
 423   /* Return true if the pid_to_exec_file op is supported.  */
 424   virtual bool supports_pid_to_exec_file ();
 425
 426   /* Return the full absolute name of the executable file that was
 427      run to create the process PID.  If the executable file cannot
 428      be determined, NULL is returned.  Otherwise, a pointer to a
 429      character string containing the pathname is returned.  This
 430      string should be copied into a buffer by the client if the string
 431      will not be immediately used, or if it must persist.  */
 432   virtual const char *pid_to_exec_file (int pid);
 433
 434   /* Return true if any of the multifs ops is supported.  */
 435   virtual bool supports_multifs ();
 436
 437   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 438      the filesystem as it appears to process PID.  Systems where all
 439      processes share a common filesystem should not override this.
 440      The default behavior is to use open(2).  */
 441   virtual int multifs_open (int pid, const char *filename,
 442                             int flags, mode_t mode);
 443
 444   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 445      in the filesystem as it appears to process PID.  Systems where
 446      all processes share a common filesystem should not override this.
 447      The default behavior is to use unlink(2).  */
 448   virtual int multifs_unlink (int pid, const char *filename);
 449
 450   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 451      operating in the filesystem as it appears to process PID.
 452      Systems where all processes share a common filesystem should
 453      not override this.  The default behavior is to use readlink(2).  */
 454   virtual ssize_t multifs_readlink (int pid, const char *filename,
 455                                     char *buf, size_t bufsiz);
 456
 457   /* Return the breakpoint kind for this target based on PC.  The
 458      PCPTR is adjusted to the real memory location in case a flag
 459      (e.g., the Thumb bit on ARM) was present in the PC.  */
 460   virtual int breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 461
 462   /* Return the software breakpoint from KIND.  KIND can have target
 463      specific meaning like the Z0 kind parameter.
 464      SIZE is set to the software breakpoint's length in memory.  */
 465   virtual const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) = 0;
 466
 467   /* Return the breakpoint kind for this target based on the current
 468      processor state (e.g. the current instruction mode on ARM) and the
 469      PC.  The PCPTR is adjusted to the real memory location in case a
 470      flag (e.g., the Thumb bit on ARM) is present in the  PC.  */
 471   virtual int breakpoint_kind_from_current_state (CORE_ADDR *pcptr);
 472
 473   /* Return the thread's name, or NULL if the target is unable to
 474      determine it.  The returned value must not be freed by the
 475      caller.  */
 476   virtual const char *thread_name (ptid_t thread);
 477
 478   /* Thread ID to (numeric) thread handle: Return true on success and
 479      false for failure.  Return pointer to thread handle via HANDLE
 480      and the handle's length via HANDLE_LEN.  */
 481   virtual bool thread_handle (ptid_t ptid, gdb_byte **handle,
 482                               int *handle_len);
 483
 484   /* If THREAD is a fork/vfork/clone child that was not reported to
 485      GDB, return its parent else nullptr.  */
 486   virtual thread_info *thread_pending_parent (thread_info *thread);
 487
 488   /* If THREAD is the parent of a fork/vfork/clone child that was not
 489      reported to GDB, return this child and fill in KIND with the
 490      matching waitkind, otherwise nullptr.  */
 491   virtual thread_info *thread_pending_child (thread_info *thread,
 492                                              target_waitkind *kind);
 493
 494   /* Returns true if the target can software single step.  */
 495   virtual bool supports_software_single_step ();
 496
 497   /* Return true if the target supports catch syscall.  */
 498   virtual bool supports_catch_syscall ();
 499
 500   /* Return tdesc index for IPA.  */
 501   virtual int get_ipa_tdesc_idx ();
 502
 503   /* Returns true if the target supports memory tagging facilities.  */
 504   virtual bool supports_memory_tagging ();
 505
 506   /* Return the allocated memory tags of type TYPE associated with
 507      [ADDRESS, ADDRESS + LEN) in TAGS.
 508
 509      Returns true if successful and false otherwise.  */
 510   virtual bool fetch_memtags (CORE_ADDR address, size_t len,
 511                               gdb::byte_vector &tags, int type);
 512
 513   /* Write the allocation tags of type TYPE contained in TAGS to the
 514      memory range [ADDRESS, ADDRESS + LEN).
 515
 516      Returns true if successful and false otherwise.  */
 517   virtual bool store_memtags (CORE_ADDR address, size_t len,
 518                               const gdb::byte_vector &tags, int type);
 519 };
 520
 521 extern process_stratum_target *the_target;
 522
 523 void set_target_ops (process_stratum_target *);
 524
 525 #define target_create_inferior(program, program_args)   \
 526   the_target->create_inferior (program, program_args)
 527
 528 #define target_post_create_inferior()                    \
 529   the_target->post_create_inferior ()
 530
 531 #define myattach(pid) \
 532   the_target->attach (pid)
 533
 534 int kill_inferior (process_info *proc);
 535
 536 #define target_supports_fork_events() \
 537   the_target->supports_fork_events ()
 538
 539 #define target_supports_vfork_events() \
 540   the_target->supports_vfork_events ()
 541
 542 #define target_supported_thread_options(options) \
 543   the_target->supported_thread_options (options)
 544
 545 #define target_supports_exec_events() \
 546   the_target->supports_exec_events ()
 547
 548 #define target_supports_memory_tagging() \
 549   the_target->supports_memory_tagging ()
 550
 551 #define target_handle_new_gdb_connection()               \
 552   the_target->handle_new_gdb_connection ()
 553
 554 #define detach_inferior(proc) \
 555   the_target->detach (proc)
 556
 557 #define mythread_alive(pid) \
 558   the_target->thread_alive (pid)
 559
 560 #define fetch_inferior_registers(regcache, regno)       \
 561   the_target->fetch_registers (regcache, regno)
 562
 563 #define store_inferior_registers(regcache, regno) \
 564   the_target->store_registers (regcache, regno)
 565
 566 #define join_inferior(pid) \
 567   the_target->join (pid)
 568
 569 #define target_supports_non_stop() \
 570   the_target->supports_non_stop ()
 571
 572 #define target_async(enable) \
 573   the_target->async (enable)
 574
 575 #define target_process_qsupported(features) \
 576   the_target->process_qsupported (features)
 577
 578 #define target_supports_catch_syscall()                 \
 579   the_target->supports_catch_syscall ()
 580
 581 #define target_get_ipa_tdesc_idx()                      \
 582   the_target->get_ipa_tdesc_idx ()
 583
 584 #define target_supports_tracepoints()                   \
 585   the_target->supports_tracepoints ()
 586
 587 #define target_supports_fast_tracepoints()              \
 588   the_target->supports_fast_tracepoints ()
 589
 590 #define target_get_min_fast_tracepoint_insn_len()       \
 591   the_target->get_min_fast_tracepoint_insn_len ()
 592
 593 #define target_thread_stopped(thread) \
 594   the_target->thread_stopped (thread)
 595
 596 #define target_pause_all(freeze)                \
 597   the_target->pause_all (freeze)
 598
 599 #define target_unpause_all(unfreeze)            \
 600   the_target->unpause_all (unfreeze)
 601
 602 #define target_stabilize_threads()              \
 603   the_target->stabilize_threads ()
 604
 605 #define target_install_fast_tracepoint_jump_pad(tpoint, tpaddr,         \
 606                                                 collector, lockaddr,    \
 607                                                 orig_size,              \
 608                                                 jump_entry,             \
 609                                                 trampoline, trampoline_size, \
 610                                                 jjump_pad_insn,         \
 611                                                 jjump_pad_insn_size,    \
 612                                                 adjusted_insn_addr,     \
 613                                                 adjusted_insn_addr_end, \
 614                                                 err)                    \
 615   the_target->install_fast_tracepoint_jump_pad (tpoint, tpaddr, \
 616                                                 collector,lockaddr,     \
 617                                                 orig_size, jump_entry,  \
 618                                                 trampoline,             \
 619                                                 trampoline_size,        \
 620                                                 jjump_pad_insn,         \
 621                                                 jjump_pad_insn_size,    \
 622                                                 adjusted_insn_addr,     \
 623                                                 adjusted_insn_addr_end, \
 624                                                 err)
 625
 626 #define target_emit_ops() \
 627   the_target->emit_ops ()
 628
 629 #define target_supports_disable_randomization() \
 630   the_target->supports_disable_randomization ()
 631
 632 #define target_supports_agent() \
 633   the_target->supports_agent ()
 634
 635 static inline struct btrace_target_info *
 636 target_enable_btrace (thread_info *tp, const struct btrace_config *conf)
 637 {
 638   return the_target->enable_btrace (tp, conf);
 639 }
 640
 641 static inline int
 642 target_disable_btrace (struct btrace_target_info *tinfo)
 643 {
 644   return the_target->disable_btrace (tinfo);
 645 }
 646
 647 static inline int
 648 target_read_btrace (struct btrace_target_info *tinfo,
 649                     std::string *buffer,
 650                     enum btrace_read_type type)
 651 {
 652   return the_target->read_btrace (tinfo, buffer, type);
 653 }
 654
 655 static inline int
 656 target_read_btrace_conf (struct btrace_target_info *tinfo,
 657                          std::string *buffer)
 658 {
 659   return the_target->read_btrace_conf (tinfo, buffer);
 660 }
 661
 662 #define target_supports_range_stepping() \
 663   the_target->supports_range_stepping ()
 664
 665 #define target_supports_stopped_by_sw_breakpoint() \
 666   the_target->supports_stopped_by_sw_breakpoint ()
 667
 668 #define target_stopped_by_sw_breakpoint() \
 669   the_target->stopped_by_sw_breakpoint ()
 670
 671 #define target_supports_stopped_by_hw_breakpoint() \
 672   the_target->supports_stopped_by_hw_breakpoint ()
 673
 674 #define target_supports_hardware_single_step() \
 675   the_target->supports_hardware_single_step ()
 676
 677 #define target_stopped_by_hw_breakpoint() \
 678   the_target->stopped_by_hw_breakpoint ()
 679
 680 #define target_breakpoint_kind_from_pc(pcptr) \
 681   the_target->breakpoint_kind_from_pc (pcptr)
 682
 683 #define target_breakpoint_kind_from_current_state(pcptr) \
 684   the_target->breakpoint_kind_from_current_state (pcptr)
 685
 686 #define target_supports_software_single_step() \
 687   the_target->supports_software_single_step ()
 688
 689 #define target_any_resumed() \
 690   the_target->any_resumed ()
 691
 692 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus,
 693                target_wait_flags options, int connected_wait);
 694
 695 #define target_core_of_thread(ptid)             \
 696   the_target->core_of_thread (ptid)
 697
 698 #define target_thread_name(ptid)                                \
 699   the_target->thread_name (ptid)
 700
 701 #define target_thread_handle(ptid, handle, handle_len) \
 702   the_target->thread_handle (ptid, handle, handle_len)
 703
 704 static inline thread_info *
 705 target_thread_pending_parent (thread_info *thread)
 706 {
 707   return the_target->thread_pending_parent (thread);
 708 }
 709
 710 static inline thread_info *
 711 target_thread_pending_child (thread_info *thread, target_waitkind *kind)
 712 {
 713   return the_target->thread_pending_child (thread, kind);
 714 }
 715
 716 /* Read LEN bytes from MEMADDR in the buffer MYADDR.  Return 0 if the read
 717    is successful, otherwise, return a non-zero error code.  */
 718
 719 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 720
 721 /* Set GDBserver's current thread to the thread the client requested
 722    via Hg.  Also switches the current process to the requested
 723    process.  If the requested thread is not found in the thread list,
 724    then the current thread is set to NULL.  Likewise, if the requested
 725    process is not found in the process list, then the current process
 726    is set to NULL.  Returns true if the requested thread was found,
 727    false otherwise.  */
 728
 729 bool set_desired_thread ();
 730
 731 /* Set GDBserver's current process to the process the client requested
 732    via Hg.  The current thread is set to NULL.  */
 733
 734 bool set_desired_process ();
 735
 736 std::string target_pid_to_str (ptid_t);
 737
 738 #endif /* GDBSERVER_TARGET_H */