gdbserver/target.h

   1 /* Target operations for the remote server for GDB.
   2    Copyright (C) 2002-2020 Free Software Foundation, Inc.
   3
   4    Contributed by MontaVista Software.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GDBSERVER_TARGET_H
  22 #define GDBSERVER_TARGET_H
  23
  24 #include <sys/types.h> /* for mode_t */
  25 #include "target/target.h"
  26 #include "target/resume.h"
  27 #include "target/wait.h"
  28 #include "target/waitstatus.h"
  29 #include "mem-break.h"
  30 #include "gdbsupport/btrace-common.h"
  31 #include <vector>
  32
  33 struct emit_ops;
  34 struct buffer;
  35 struct process_info;
  36
  37 /* This structure describes how to resume a particular thread (or all
  38    threads) based on the client's request.  If thread is -1, then this
  39    entry applies to all threads.  These are passed around as an
  40    array.  */
  41
  42 struct thread_resume
  43 {
  44   ptid_t thread;
  45
  46   /* How to "resume".  */
  47   enum resume_kind kind;
  48
  49   /* If non-zero, send this signal when we resume, or to stop the
  50      thread.  If stopping a thread, and this is 0, the target should
  51      stop the thread however it best decides to (e.g., SIGSTOP on
  52      linux; SuspendThread on win32).  This is a host signal value (not
  53      enum gdb_signal).  */
  54   int sig;
  55
  56   /* Range to single step within.  Valid only iff KIND is resume_step.
  57
  58      Single-step once, and then continuing stepping as long as the
  59      thread stops in this range.  (If the range is empty
  60      [STEP_RANGE_START == STEP_RANGE_END], then this is a single-step
  61      request.)  */
  62   CORE_ADDR step_range_start;   /* Inclusive */
  63   CORE_ADDR step_range_end;     /* Exclusive */
  64 };
  65
  66 class process_target;
  67
  68 /* GDBserver doesn't have a concept of strata like GDB, but we call
  69    its target vector "process_stratum" anyway for the benefit of
  70    shared code.  */
  71 struct process_stratum_target
  72 {
  73   /* Read solib info on SVR4 platforms.  */
  74   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
  75                                unsigned const char *writebuf,
  76                                CORE_ADDR offset, int len);
  77
  78   /* Return true if target supports debugging agent.  */
  79   int (*supports_agent) (void);
  80
  81   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
  82      target information struct for reading and for disabling branch trace.  */
  83   struct btrace_target_info *(*enable_btrace)
  84     (ptid_t ptid, const struct btrace_config *conf);
  85
  86   /* Disable branch tracing.
  87      Returns zero on success, non-zero otherwise.  */
  88   int (*disable_btrace) (struct btrace_target_info *tinfo);
  89
  90   /* Read branch trace data into buffer.
  91      Return 0 on success; print an error message into BUFFER and return -1,
  92      otherwise.  */
  93   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
  94                       enum btrace_read_type type);
  95
  96   /* Read the branch trace configuration into BUFFER.
  97      Return 0 on success; print an error message into BUFFER and return -1
  98      otherwise.  */
  99   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 100
 101   /* Return true if target supports range stepping.  */
 102   int (*supports_range_stepping) (void);
 103
 104   /* Return the full absolute name of the executable file that was
 105      run to create the process PID.  If the executable file cannot
 106      be determined, NULL is returned.  Otherwise, a pointer to a
 107      character string containing the pathname is returned.  This
 108      string should be copied into a buffer by the client if the string
 109      will not be immediately used, or if it must persist.  */
 110   char *(*pid_to_exec_file) (int pid);
 111
 112   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 113      the filesystem as it appears to process PID.  Systems where all
 114      processes share a common filesystem should set this to NULL.
 115      If NULL, the caller should fall back to open(2).  */
 116   int (*multifs_open) (int pid, const char *filename,
 117                        int flags, mode_t mode);
 118
 119   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 120      in the filesystem as it appears to process PID.  Systems where
 121      all processes share a common filesystem should set this to NULL.
 122      If NULL, the caller should fall back to unlink(2).  */
 123   int (*multifs_unlink) (int pid, const char *filename);
 124
 125   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 126      operating in the filesystem as it appears to process PID.
 127      Systems where all processes share a common filesystem should
 128      set this to NULL.  If NULL, the caller should fall back to
 129      readlink(2).  */
 130   ssize_t (*multifs_readlink) (int pid, const char *filename,
 131                                char *buf, size_t bufsiz);
 132
 133   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 134      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 135      ARM) was present in the PC.  */
 136   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 137
 138   /* Return the software breakpoint from KIND.  KIND can have target
 139      specific meaning like the Z0 kind parameter.
 140      SIZE is set to the software breakpoint's length in memory.  */
 141   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 142
 143   /* Return the thread's name, or NULL if the target is unable to determine it.
 144      The returned value must not be freed by the caller.  */
 145   const char *(*thread_name) (ptid_t thread);
 146
 147   /* Return the breakpoint kind for this target based on the current
 148      processor state (e.g. the current instruction mode on ARM) and the
 149      PC.  The PCPTR is adjusted to the real memory location in case a flag
 150      (e.g., the Thumb bit on ARM) is present in the PC.  */
 151   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 152
 153   /* Returns true if the target can software single step.  */
 154   int (*supports_software_single_step) (void);
 155
 156   /* Return 1 if the target supports catch syscall, 0 (or leave the
 157      callback NULL) otherwise.  */
 158   int (*supports_catch_syscall) (void);
 159
 160   /* Return tdesc index for IPA.  */
 161   int (*get_ipa_tdesc_idx) (void);
 162
 163   /* Thread ID to (numeric) thread handle: Return true on success and
 164      false for failure.  Return pointer to thread handle via HANDLE
 165      and the handle's length via HANDLE_LEN.  */
 166   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 167
 168   /* The object that will gradually replace this struct.  */
 169   process_target *pt;
 170 };
 171
 172 class process_target
 173 {
 174 public:
 175
 176   virtual ~process_target () = default;
 177
 178   /* Start a new process.
 179
 180      PROGRAM is a path to the program to execute.
 181      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 182      to be passed to the inferior as ``argv'' (along with PROGRAM).
 183
 184      Returns the new PID on success, -1 on failure.  Registers the new
 185      process with the process list.  */
 186   virtual int create_inferior (const char *program,
 187                                const std::vector<char *> &program_args) = 0;
 188
 189   /* Do additional setup after a new process is created, including
 190      exec-wrapper completion.  */
 191   virtual void post_create_inferior ();
 192
 193   /* Attach to a running process.
 194
 195      PID is the process ID to attach to, specified by the user
 196      or a higher layer.
 197
 198      Returns -1 if attaching is unsupported, 0 on success, and calls
 199      error() otherwise.  */
 200   virtual int attach (unsigned long pid) = 0;
 201
 202   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 203   virtual int kill (process_info *proc) = 0;
 204
 205   /* Detach from process PROC.  Return -1 on failure, and 0 on
 206      success.  */
 207   virtual int detach (process_info *proc) = 0;
 208
 209   /* The inferior process has died.  Do what is right.  */
 210   virtual void mourn (process_info *proc) = 0;
 211
 212   /* Wait for process PID to exit.  */
 213   virtual void join (int pid) = 0;
 214
 215   /* Return true iff the thread with process ID PID is alive.  */
 216   virtual bool thread_alive (ptid_t pid) = 0;
 217
 218   /* Resume the inferior process.  */
 219   virtual void resume (thread_resume *resume_info, size_t n) = 0;
 220
 221   /* Wait for the inferior process or thread to change state.  Store
 222      status through argument pointer STATUS.
 223
 224      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 225      wait for any thread of process pid to do something.  Return ptid
 226      of child, or -1 in case of error; store status through argument
 227      pointer STATUS.  OPTIONS is a bit set of options defined as
 228      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 229      no child stop to report, return is
 230      null_ptid/TARGET_WAITKIND_IGNORE.  */
 231   virtual ptid_t wait (ptid_t ptid, target_waitstatus *status,
 232                        int options) = 0;
 233
 234   /* Fetch registers from the inferior process.
 235
 236      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 237   virtual void fetch_registers (regcache *regcache, int regno) = 0;
 238
 239   /* Store registers to the inferior process.
 240
 241      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 242   virtual void store_registers (regcache *regcache, int regno) = 0;
 243
 244   /* Prepare to read or write memory from the inferior process.
 245      Targets use this to do what is necessary to get the state of the
 246      inferior such that it is possible to access memory.
 247
 248      This should generally only be called from client facing routines,
 249      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 250      insertion routine.
 251
 252      Like `read_memory' and `write_memory' below, returns 0 on success
 253      and errno on failure.  */
 254   virtual int prepare_to_access_memory ();
 255
 256   /* Undo the effects of prepare_to_access_memory.  */
 257   virtual void done_accessing_memory ();
 258
 259   /* Read memory from the inferior process.  This should generally be
 260      called through read_inferior_memory, which handles breakpoint shadowing.
 261
 262      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 263
 264      Returns 0 on success and errno on failure.  */
 265   virtual int read_memory (CORE_ADDR memaddr, unsigned char *myaddr,
 266                            int len) = 0;
 267
 268   /* Write memory to the inferior process.  This should generally be
 269      called through target_write_memory, which handles breakpoint shadowing.
 270
 271      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 272
 273      Returns 0 on success and errno on failure.  */
 274   virtual int write_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 275                             int len) = 0;
 276
 277   /* Query GDB for the values of any symbols we're interested in.
 278      This function is called whenever we receive a "qSymbols::"
 279      query, which corresponds to every time more symbols (might)
 280      become available.  */
 281   virtual void look_up_symbols ();
 282
 283   /* Send an interrupt request to the inferior process,
 284      however is appropriate.  */
 285   virtual void request_interrupt () = 0;
 286
 287   /* Return true if the read_auxv target op is supported.  */
 288   virtual bool supports_read_auxv ();
 289
 290   /* Read auxiliary vector data from the inferior process.
 291
 292      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 293   virtual int read_auxv (CORE_ADDR offset, unsigned char *myaddr,
 294                          unsigned int len);
 295
 296   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 297      otherwise.  The type is coded as follows:
 298        '0' - software-breakpoint
 299        '1' - hardware-breakpoint
 300        '2' - write watchpoint
 301        '3' - read watchpoint
 302        '4' - access watchpoint
 303   */
 304   virtual bool supports_z_point_type (char z_type);
 305
 306   /* Insert and remove a break or watchpoint.
 307      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 308   virtual int insert_point (enum raw_bkpt_type type, CORE_ADDR addr,
 309                             int size, raw_breakpoint *bp);
 310
 311   virtual int remove_point (enum raw_bkpt_type type, CORE_ADDR addr,
 312                             int size, raw_breakpoint *bp);
 313
 314   /* Returns true if the target stopped because it executed a software
 315      breakpoint instruction, false otherwise.  */
 316   virtual bool stopped_by_sw_breakpoint ();
 317
 318   /* Returns true if the target knows whether a trap was caused by a
 319      SW breakpoint triggering.  */
 320   virtual bool supports_stopped_by_sw_breakpoint ();
 321
 322   /* Returns true if the target stopped for a hardware breakpoint.  */
 323   virtual bool stopped_by_hw_breakpoint ();
 324
 325   /* Returns true if the target knows whether a trap was caused by a
 326      HW breakpoint triggering.  */
 327   virtual bool supports_stopped_by_hw_breakpoint ();
 328
 329   /* Returns true if the target can do hardware single step.  */
 330   virtual bool supports_hardware_single_step ();
 331
 332   /* Returns true if target was stopped due to a watchpoint hit, false
 333      otherwise.  */
 334   virtual bool stopped_by_watchpoint ();
 335
 336   /* Returns the address associated with the watchpoint that hit, if any;
 337      returns 0 otherwise.  */
 338   virtual CORE_ADDR stopped_data_address ();
 339
 340   /* Return true if the read_offsets target op is supported.  */
 341   virtual bool supports_read_offsets ();
 342
 343   /* Reports the text, data offsets of the executable.  This is
 344      needed for uclinux where the executable is relocated during load
 345      time.  */
 346   virtual int read_offsets (CORE_ADDR *text, CORE_ADDR *data);
 347
 348   /* Return true if the get_tls_address target op is supported.  */
 349   virtual bool supports_get_tls_address ();
 350
 351   /* Fetch the address associated with a specific thread local storage
 352      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 353      Stores it in *ADDRESS and returns zero on success; otherwise returns
 354      an error code.  A return value of -1 means this system does not
 355      support the operation.  */
 356   virtual int get_tls_address (thread_info *thread, CORE_ADDR offset,
 357                                CORE_ADDR load_module, CORE_ADDR *address);
 358
 359   /* Fill BUF with an hostio error packet representing the last hostio
 360      error.  */
 361   virtual void hostio_last_error (char *buf);
 362
 363   /* Return true if the qxfer_osdata target op is supported.  */
 364   virtual bool supports_qxfer_osdata ();
 365
 366   /* Read/Write OS data using qXfer packets.  */
 367   virtual int qxfer_osdata (const char *annex, unsigned char *readbuf,
 368                             unsigned const char *writebuf,
 369                             CORE_ADDR offset, int len);
 370
 371   /* Return true if the qxfer_siginfo target op is supported.  */
 372   virtual bool supports_qxfer_siginfo ();
 373
 374   /* Read/Write extra signal info.  */
 375   virtual int qxfer_siginfo (const char *annex, unsigned char *readbuf,
 376                              unsigned const char *writebuf,
 377                              CORE_ADDR offset, int len);
 378
 379   /* Return true if non-stop mode is supported.  */
 380   virtual bool supports_non_stop ();
 381
 382   /* Enables async target events.  Returns the previous enable
 383      state.  */
 384   virtual bool async (bool enable);
 385
 386   /* Switch to non-stop (ENABLE == true) or all-stop (ENABLE == false)
 387      mode.  Return 0 on success, -1 otherwise.  */
 388   virtual int start_non_stop (bool enable);
 389
 390   /* Returns true if the target supports multi-process debugging.  */
 391   virtual bool supports_multi_process ();
 392
 393   /* Returns true if fork events are supported.  */
 394   virtual bool supports_fork_events ();
 395
 396   /* Returns true if vfork events are supported.  */
 397   virtual bool supports_vfork_events ();
 398
 399   /* Returns true if exec events are supported.  */
 400   virtual bool supports_exec_events ();
 401
 402   /* Allows target to re-initialize connection-specific settings.  */
 403   virtual void handle_new_gdb_connection ();
 404
 405   /* The target-specific routine to process monitor command.
 406      Returns 1 if handled, or 0 to perform default processing.  */
 407   virtual int handle_monitor_command (char *mon);
 408
 409   /* Returns the core given a thread, or -1 if not known.  */
 410   virtual int core_of_thread (ptid_t ptid);
 411
 412   /* Returns true if the read_loadmap target op is supported.  */
 413   virtual bool supports_read_loadmap ();
 414
 415   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 416   virtual int read_loadmap (const char *annex, CORE_ADDR offset,
 417                             unsigned char *myaddr, unsigned int len);
 418
 419   /* Target specific qSupported support.  FEATURES is an array of
 420      features with COUNT elements.  */
 421   virtual void process_qsupported (char **features, int count);
 422
 423   /* Return true if the target supports tracepoints, false otherwise.  */
 424   virtual bool supports_tracepoints ();
 425
 426   /* Read PC from REGCACHE.  */
 427   virtual CORE_ADDR read_pc (regcache *regcache);
 428
 429   /* Write PC to REGCACHE.  */
 430   virtual void write_pc (regcache *regcache, CORE_ADDR pc);
 431
 432   /* Return true if the thread_stopped op is supported.  */
 433   virtual bool supports_thread_stopped ();
 434
 435   /* Return true if THREAD is known to be stopped now.  */
 436   virtual bool thread_stopped (thread_info *thread);
 437
 438   /* Return true if the get_tib_address op is supported.  */
 439   virtual bool supports_get_tib_address ();
 440
 441   /* Read Thread Information Block address.  */
 442   virtual int get_tib_address (ptid_t ptid, CORE_ADDR *address);
 443
 444   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 445      be ignored until an unpause_all call unfreezes threads again.
 446      There can be nested calls to pause_all, so a freeze counter
 447      should be maintained.  */
 448   virtual void pause_all (bool freeze);
 449
 450   /* Unpause all threads.  Threads that hadn't been resumed by the
 451      client should be left stopped.  Basically a pause/unpause call
 452      pair should not end up resuming threads that were stopped before
 453      the pause call.  */
 454   virtual void unpause_all (bool unfreeze);
 455
 456   /* Stabilize all threads.  That is, force them out of jump pads.  */
 457   virtual void stabilize_threads ();
 458
 459   /* Return true if the install_fast_tracepoint_jump_pad op is
 460      supported.  */
 461   virtual bool supports_fast_tracepoints ();
 462
 463   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 464      tracepoint internal object as used by the IPA agent.  TPADDR is
 465      the address of tracepoint.  COLLECTOR is address of the function
 466      the jump pad redirects to.  LOCKADDR is the address of the jump
 467      pad lock object.  ORIG_SIZE is the size in bytes of the
 468      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 469      jump pad entry, and on return holds the address past the end of
 470      the created jump pad.  If a trampoline is created by the function,
 471      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 472      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 473      buffer containing a copy of the instruction at TPADDR.
 474      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 475      return the address range where the instruction at TPADDR was relocated
 476      to.  If an error occurs, the ERR may be used to pass on an error
 477      message.  */
 478   virtual int install_fast_tracepoint_jump_pad
 479     (CORE_ADDR tpoint, CORE_ADDR tpaddr, CORE_ADDR collector,
 480      CORE_ADDR lockaddr, ULONGEST orig_size, CORE_ADDR *jump_entry,
 481      CORE_ADDR *trampoline, ULONGEST *trampoline_size,
 482      unsigned char *jjump_pad_insn, ULONGEST *jjump_pad_insn_size,
 483      CORE_ADDR *adjusted_insn_addr, CORE_ADDR *adjusted_insn_addr_end,
 484      char *err);
 485
 486   /* Return the minimum length of an instruction that can be safely
 487      overwritten for use as a fast tracepoint.  */
 488   virtual int get_min_fast_tracepoint_insn_len ();
 489
 490   /* Return the bytecode operations vector for the current inferior.
 491      Returns nullptr if bytecode compilation is not supported.  */
 492   virtual struct emit_ops *emit_ops ();
 493
 494   /* Returns true if the target supports disabling randomization.  */
 495   virtual bool supports_disable_randomization ();
 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->pt->emit_ops ()
 601
 602 #define target_supports_disable_randomization() \
 603   the_target->pt->supports_disable_randomization ()
 604
 605 #define target_supports_agent() \
 606   (the_target->supports_agent ? \
 607    (*the_target->supports_agent) () : 0)
 608
 609 static inline struct btrace_target_info *
 610 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 611 {
 612   if (the_target->enable_btrace == nullptr)
 613     error (_("Target does not support branch tracing."));
 614
 615   return (*the_target->enable_btrace) (ptid, conf);
 616 }
 617
 618 static inline int
 619 target_disable_btrace (struct btrace_target_info *tinfo)
 620 {
 621   if (the_target->disable_btrace == nullptr)
 622     error (_("Target does not support branch tracing."));
 623
 624   return (*the_target->disable_btrace) (tinfo);
 625 }
 626
 627 static inline int
 628 target_read_btrace (struct btrace_target_info *tinfo,
 629                     struct buffer *buffer,
 630                     enum btrace_read_type type)
 631 {
 632   if (the_target->read_btrace == nullptr)
 633     error (_("Target does not support branch tracing."));
 634
 635   return (*the_target->read_btrace) (tinfo, buffer, type);
 636 }
 637
 638 static inline int
 639 target_read_btrace_conf (struct btrace_target_info *tinfo,
 640                          struct buffer *buffer)
 641 {
 642   if (the_target->read_btrace_conf == nullptr)
 643     error (_("Target does not support branch tracing."));
 644
 645   return (*the_target->read_btrace_conf) (tinfo, buffer);
 646 }
 647
 648 #define target_supports_range_stepping() \
 649   (the_target->supports_range_stepping ? \
 650    (*the_target->supports_range_stepping) () : 0)
 651
 652 #define target_supports_stopped_by_sw_breakpoint() \
 653   the_target->pt->supports_stopped_by_sw_breakpoint ()
 654
 655 #define target_stopped_by_sw_breakpoint() \
 656   the_target->pt->stopped_by_sw_breakpoint ()
 657
 658 #define target_supports_stopped_by_hw_breakpoint() \
 659   the_target->pt->supports_stopped_by_hw_breakpoint ()
 660
 661 #define target_supports_hardware_single_step() \
 662   the_target->pt->supports_hardware_single_step ()
 663
 664 #define target_stopped_by_hw_breakpoint() \
 665   the_target->pt->stopped_by_hw_breakpoint ()
 666
 667 #define target_breakpoint_kind_from_pc(pcptr) \
 668   (the_target->breakpoint_kind_from_pc \
 669    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 670    : default_breakpoint_kind_from_pc (pcptr))
 671
 672 #define target_breakpoint_kind_from_current_state(pcptr) \
 673   (the_target->breakpoint_kind_from_current_state \
 674    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 675    : target_breakpoint_kind_from_pc (pcptr))
 676
 677 #define target_supports_software_single_step() \
 678   (the_target->supports_software_single_step ? \
 679    (*the_target->supports_software_single_step) () : 0)
 680
 681 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 682                int connected_wait);
 683
 684 /* Prepare to read or write memory from the inferior process.  See the
 685    corresponding process_stratum_target methods for more details.  */
 686
 687 int prepare_to_access_memory (void);
 688 void done_accessing_memory (void);
 689
 690 #define target_core_of_thread(ptid)             \
 691   the_target->pt->core_of_thread (ptid)
 692
 693 #define target_thread_name(ptid)                                \
 694   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 695    : NULL)
 696
 697 #define target_thread_handle(ptid, handle, handle_len) \
 698    (the_target->thread_handle ? (*the_target->thread_handle) \
 699                                   (ptid, handle, handle_len) \
 700    : false)
 701
 702 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 703
 704 int set_desired_thread ();
 705
 706 const char *target_pid_to_str (ptid_t);
 707
 708 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 709
 710 #endif /* GDBSERVER_TARGET_H */