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