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   /* Query GDB for the values of any symbols we're interested in.
  74      This function is called whenever we receive a "qSymbols::"
  75      query, which corresponds to every time more symbols (might)
  76      become available.  NULL if we aren't interested in any
  77      symbols.  */
  78
  79   void (*look_up_symbols) (void);
  80
  81   /* Send an interrupt request to the inferior process,
  82      however is appropriate.  */
  83
  84   void (*request_interrupt) (void);
  85
  86   /* Read auxiliary vector data from the inferior process.
  87
  88      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
  89
  90   int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
  91                     unsigned int len);
  92
  93   /* Returns true if GDB Z breakpoint type TYPE is supported, false
  94      otherwise.  The type is coded as follows:
  95        '0' - software-breakpoint
  96        '1' - hardware-breakpoint
  97        '2' - write watchpoint
  98        '3' - read watchpoint
  99        '4' - access watchpoint
 100   */
 101   int (*supports_z_point_type) (char z_type);
 102
 103   /* Insert and remove a break or watchpoint.
 104      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 105
 106   int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 107                        int size, struct raw_breakpoint *bp);
 108   int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 109                        int size, struct raw_breakpoint *bp);
 110
 111   /* Returns 1 if the target stopped because it executed a software
 112      breakpoint instruction, 0 otherwise.  */
 113   int (*stopped_by_sw_breakpoint) (void);
 114
 115   /* Returns true if the target knows whether a trap was caused by a
 116      SW breakpoint triggering.  */
 117   int (*supports_stopped_by_sw_breakpoint) (void);
 118
 119   /* Returns 1 if the target stopped for a hardware breakpoint.  */
 120   int (*stopped_by_hw_breakpoint) (void);
 121
 122   /* Returns true if the target knows whether a trap was caused by a
 123      HW breakpoint triggering.  */
 124   int (*supports_stopped_by_hw_breakpoint) (void);
 125
 126   /* Returns true if the target can do hardware single step.  */
 127   int (*supports_hardware_single_step) (void);
 128
 129   /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise.  */
 130
 131   int (*stopped_by_watchpoint) (void);
 132
 133   /* Returns the address associated with the watchpoint that hit, if any;
 134      returns 0 otherwise.  */
 135
 136   CORE_ADDR (*stopped_data_address) (void);
 137
 138   /* Reports the text, data offsets of the executable.  This is
 139      needed for uclinux where the executable is relocated during load
 140      time.  */
 141
 142   int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
 143
 144   /* Fetch the address associated with a specific thread local storage
 145      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 146      Stores it in *ADDRESS and returns zero on success; otherwise returns
 147      an error code.  A return value of -1 means this system does not
 148      support the operation.  */
 149
 150   int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
 151                           CORE_ADDR load_module, CORE_ADDR *address);
 152
 153   /* Fill BUF with an hostio error packet representing the last hostio
 154      error.  */
 155   void (*hostio_last_error) (char *buf);
 156
 157   /* Read/Write OS data using qXfer packets.  */
 158   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
 159                        unsigned const char *writebuf, CORE_ADDR offset,
 160                        int len);
 161
 162   /* Read/Write extra signal info.  */
 163   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
 164                         unsigned const char *writebuf,
 165                         CORE_ADDR offset, int len);
 166
 167   int (*supports_non_stop) (void);
 168
 169   /* Enables async target events.  Returns the previous enable
 170      state.  */
 171   int (*async) (int enable);
 172
 173   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
 174      success, -1 otherwise.  */
 175   int (*start_non_stop) (int);
 176
 177   /* Returns true if the target supports multi-process debugging.  */
 178   int (*supports_multi_process) (void);
 179
 180   /* Returns true if fork events are supported.  */
 181   int (*supports_fork_events) (void);
 182
 183   /* Returns true if vfork events are supported.  */
 184   int (*supports_vfork_events) (void);
 185
 186   /* Returns true if exec events are supported.  */
 187   int (*supports_exec_events) (void);
 188
 189   /* Allows target to re-initialize connection-specific settings.  */
 190   void (*handle_new_gdb_connection) (void);
 191
 192   /* If not NULL, target-specific routine to process monitor command.
 193      Returns 1 if handled, or 0 to perform default processing.  */
 194   int (*handle_monitor_command) (char *);
 195
 196   /* Returns the core given a thread, or -1 if not known.  */
 197   int (*core_of_thread) (ptid_t);
 198
 199   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 200   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 201                        unsigned char *myaddr, unsigned int len);
 202
 203   /* Target specific qSupported support.  FEATURES is an array of
 204      features with COUNT elements.  */
 205   void (*process_qsupported) (char **features, int count);
 206
 207   /* Return 1 if the target supports tracepoints, 0 (or leave the
 208      callback NULL) otherwise.  */
 209   int (*supports_tracepoints) (void);
 210
 211   /* Read PC from REGCACHE.  */
 212   CORE_ADDR (*read_pc) (struct regcache *regcache);
 213
 214   /* Write PC to REGCACHE.  */
 215   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 216
 217   /* Return true if THREAD is known to be stopped now.  */
 218   int (*thread_stopped) (struct thread_info *thread);
 219
 220   /* Read Thread Information Block address.  */
 221   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 222
 223   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 224      be ignored until an unpause_all call unfreezes threads again.
 225      There can be nested calls to pause_all, so a freeze counter
 226      should be maintained.  */
 227   void (*pause_all) (int freeze);
 228
 229   /* Unpause all threads.  Threads that hadn't been resumed by the
 230      client should be left stopped.  Basically a pause/unpause call
 231      pair should not end up resuming threads that were stopped before
 232      the pause call.  */
 233   void (*unpause_all) (int unfreeze);
 234
 235   /* Stabilize all threads.  That is, force them out of jump pads.  */
 236   void (*stabilize_threads) (void);
 237
 238   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 239      tracepoint internal object as used by the IPA agent.  TPADDR is
 240      the address of tracepoint.  COLLECTOR is address of the function
 241      the jump pad redirects to.  LOCKADDR is the address of the jump
 242      pad lock object.  ORIG_SIZE is the size in bytes of the
 243      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 244      jump pad entry, and on return holds the address past the end of
 245      the created jump pad.  If a trampoline is created by the function,
 246      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 247      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 248      buffer containing a copy of the instruction at TPADDR.
 249      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 250      return the address range where the instruction at TPADDR was relocated
 251      to.  If an error occurs, the ERR may be used to pass on an error
 252      message.  */
 253   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 254                                            CORE_ADDR collector,
 255                                            CORE_ADDR lockaddr,
 256                                            ULONGEST orig_size,
 257                                            CORE_ADDR *jump_entry,
 258                                            CORE_ADDR *trampoline,
 259                                            ULONGEST *trampoline_size,
 260                                            unsigned char *jjump_pad_insn,
 261                                            ULONGEST *jjump_pad_insn_size,
 262                                            CORE_ADDR *adjusted_insn_addr,
 263                                            CORE_ADDR *adjusted_insn_addr_end,
 264                                            char *err);
 265
 266   /* Return the bytecode operations vector for the current inferior.
 267      Returns NULL if bytecode compilation is not supported.  */
 268   struct emit_ops *(*emit_ops) (void);
 269
 270   /* Returns true if the target supports disabling randomization.  */
 271   int (*supports_disable_randomization) (void);
 272
 273   /* Return the minimum length of an instruction that can be safely overwritten
 274      for use as a fast tracepoint.  */
 275   int (*get_min_fast_tracepoint_insn_len) (void);
 276
 277   /* Read solib info on SVR4 platforms.  */
 278   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 279                                unsigned const char *writebuf,
 280                                CORE_ADDR offset, int len);
 281
 282   /* Return true if target supports debugging agent.  */
 283   int (*supports_agent) (void);
 284
 285   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 286      target information struct for reading and for disabling branch trace.  */
 287   struct btrace_target_info *(*enable_btrace)
 288     (ptid_t ptid, const struct btrace_config *conf);
 289
 290   /* Disable branch tracing.
 291      Returns zero on success, non-zero otherwise.  */
 292   int (*disable_btrace) (struct btrace_target_info *tinfo);
 293
 294   /* Read branch trace data into buffer.
 295      Return 0 on success; print an error message into BUFFER and return -1,
 296      otherwise.  */
 297   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 298                       enum btrace_read_type type);
 299
 300   /* Read the branch trace configuration into BUFFER.
 301      Return 0 on success; print an error message into BUFFER and return -1
 302      otherwise.  */
 303   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 304
 305   /* Return true if target supports range stepping.  */
 306   int (*supports_range_stepping) (void);
 307
 308   /* Return the full absolute name of the executable file that was
 309      run to create the process PID.  If the executable file cannot
 310      be determined, NULL is returned.  Otherwise, a pointer to a
 311      character string containing the pathname is returned.  This
 312      string should be copied into a buffer by the client if the string
 313      will not be immediately used, or if it must persist.  */
 314   char *(*pid_to_exec_file) (int pid);
 315
 316   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 317      the filesystem as it appears to process PID.  Systems where all
 318      processes share a common filesystem should set this to NULL.
 319      If NULL, the caller should fall back to open(2).  */
 320   int (*multifs_open) (int pid, const char *filename,
 321                        int flags, mode_t mode);
 322
 323   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 324      in the filesystem as it appears to process PID.  Systems where
 325      all processes share a common filesystem should set this to NULL.
 326      If NULL, the caller should fall back to unlink(2).  */
 327   int (*multifs_unlink) (int pid, const char *filename);
 328
 329   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 330      operating in the filesystem as it appears to process PID.
 331      Systems where all processes share a common filesystem should
 332      set this to NULL.  If NULL, the caller should fall back to
 333      readlink(2).  */
 334   ssize_t (*multifs_readlink) (int pid, const char *filename,
 335                                char *buf, size_t bufsiz);
 336
 337   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 338      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 339      ARM) was present in the PC.  */
 340   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 341
 342   /* Return the software breakpoint from KIND.  KIND can have target
 343      specific meaning like the Z0 kind parameter.
 344      SIZE is set to the software breakpoint's length in memory.  */
 345   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 346
 347   /* Return the thread's name, or NULL if the target is unable to determine it.
 348      The returned value must not be freed by the caller.  */
 349   const char *(*thread_name) (ptid_t thread);
 350
 351   /* Return the breakpoint kind for this target based on the current
 352      processor state (e.g. the current instruction mode on ARM) and the
 353      PC.  The PCPTR is adjusted to the real memory location in case a flag
 354      (e.g., the Thumb bit on ARM) is present in the PC.  */
 355   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 356
 357   /* Returns true if the target can software single step.  */
 358   int (*supports_software_single_step) (void);
 359
 360   /* Return 1 if the target supports catch syscall, 0 (or leave the
 361      callback NULL) otherwise.  */
 362   int (*supports_catch_syscall) (void);
 363
 364   /* Return tdesc index for IPA.  */
 365   int (*get_ipa_tdesc_idx) (void);
 366
 367   /* Thread ID to (numeric) thread handle: Return true on success and
 368      false for failure.  Return pointer to thread handle via HANDLE
 369      and the handle's length via HANDLE_LEN.  */
 370   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 371
 372   /* The object that will gradually replace this struct.  */
 373   process_target *pt;
 374 };
 375
 376 class process_target
 377 {
 378 public:
 379
 380   virtual ~process_target () = default;
 381
 382   /* Start a new process.
 383
 384      PROGRAM is a path to the program to execute.
 385      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 386      to be passed to the inferior as ``argv'' (along with PROGRAM).
 387
 388      Returns the new PID on success, -1 on failure.  Registers the new
 389      process with the process list.  */
 390   virtual int create_inferior (const char *program,
 391                                const std::vector<char *> &program_args) = 0;
 392
 393   /* Do additional setup after a new process is created, including
 394      exec-wrapper completion.  */
 395   virtual void post_create_inferior ();
 396
 397   /* Attach to a running process.
 398
 399      PID is the process ID to attach to, specified by the user
 400      or a higher layer.
 401
 402      Returns -1 if attaching is unsupported, 0 on success, and calls
 403      error() otherwise.  */
 404   virtual int attach (unsigned long pid) = 0;
 405
 406   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 407   virtual int kill (process_info *proc) = 0;
 408
 409   /* Detach from process PROC.  Return -1 on failure, and 0 on
 410      success.  */
 411   virtual int detach (process_info *proc) = 0;
 412
 413   /* The inferior process has died.  Do what is right.  */
 414   virtual void mourn (process_info *proc) = 0;
 415
 416   /* Wait for process PID to exit.  */
 417   virtual void join (int pid) = 0;
 418
 419   /* Return true iff the thread with process ID PID is alive.  */
 420   virtual bool thread_alive (ptid_t pid) = 0;
 421
 422   /* Resume the inferior process.  */
 423   virtual void resume (thread_resume *resume_info, size_t n) = 0;
 424
 425   /* Wait for the inferior process or thread to change state.  Store
 426      status through argument pointer STATUS.
 427
 428      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 429      wait for any thread of process pid to do something.  Return ptid
 430      of child, or -1 in case of error; store status through argument
 431      pointer STATUS.  OPTIONS is a bit set of options defined as
 432      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 433      no child stop to report, return is
 434      null_ptid/TARGET_WAITKIND_IGNORE.  */
 435   virtual ptid_t wait (ptid_t ptid, target_waitstatus *status,
 436                        int options) = 0;
 437
 438   /* Fetch registers from the inferior process.
 439
 440      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 441   virtual void fetch_registers (regcache *regcache, int regno) = 0;
 442
 443   /* Store registers to the inferior process.
 444
 445      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 446   virtual void store_registers (regcache *regcache, int regno) = 0;
 447
 448   /* Prepare to read or write memory from the inferior process.
 449      Targets use this to do what is necessary to get the state of the
 450      inferior such that it is possible to access memory.
 451
 452      This should generally only be called from client facing routines,
 453      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 454      insertion routine.
 455
 456      Like `read_memory' and `write_memory' below, returns 0 on success
 457      and errno on failure.  */
 458   virtual int prepare_to_access_memory ();
 459
 460   /* Undo the effects of prepare_to_access_memory.  */
 461   virtual void done_accessing_memory ();
 462
 463   /* Read memory from the inferior process.  This should generally be
 464      called through read_inferior_memory, which handles breakpoint shadowing.
 465
 466      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 467
 468      Returns 0 on success and errno on failure.  */
 469   virtual int read_memory (CORE_ADDR memaddr, unsigned char *myaddr,
 470                            int len) = 0;
 471
 472   /* Write memory to the inferior process.  This should generally be
 473      called through target_write_memory, which handles breakpoint shadowing.
 474
 475      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 476
 477      Returns 0 on success and errno on failure.  */
 478   virtual int write_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 479                             int len) = 0;
 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->supports_stopped_by_sw_breakpoint ? \
 664    (*the_target->supports_stopped_by_sw_breakpoint) () : 0)
 665
 666 #define target_stopped_by_sw_breakpoint() \
 667   (the_target->stopped_by_sw_breakpoint ? \
 668    (*the_target->stopped_by_sw_breakpoint) () : 0)
 669
 670 #define target_supports_stopped_by_hw_breakpoint() \
 671   (the_target->supports_stopped_by_hw_breakpoint ? \
 672    (*the_target->supports_stopped_by_hw_breakpoint) () : 0)
 673
 674 #define target_supports_hardware_single_step() \
 675   (the_target->supports_hardware_single_step ? \
 676    (*the_target->supports_hardware_single_step) () : 0)
 677
 678 #define target_stopped_by_hw_breakpoint() \
 679   (the_target->stopped_by_hw_breakpoint ? \
 680    (*the_target->stopped_by_hw_breakpoint) () : 0)
 681
 682 #define target_breakpoint_kind_from_pc(pcptr) \
 683   (the_target->breakpoint_kind_from_pc \
 684    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 685    : default_breakpoint_kind_from_pc (pcptr))
 686
 687 #define target_breakpoint_kind_from_current_state(pcptr) \
 688   (the_target->breakpoint_kind_from_current_state \
 689    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 690    : target_breakpoint_kind_from_pc (pcptr))
 691
 692 #define target_supports_software_single_step() \
 693   (the_target->supports_software_single_step ? \
 694    (*the_target->supports_software_single_step) () : 0)
 695
 696 /* Start non-stop mode, returns 0 on success, -1 on failure.   */
 697
 698 int start_non_stop (int nonstop);
 699
 700 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 701                int connected_wait);
 702
 703 /* Prepare to read or write memory from the inferior process.  See the
 704    corresponding process_stratum_target methods for more details.  */
 705
 706 int prepare_to_access_memory (void);
 707 void done_accessing_memory (void);
 708
 709 #define target_core_of_thread(ptid)             \
 710   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 711    : -1)
 712
 713 #define target_thread_name(ptid)                                \
 714   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 715    : NULL)
 716
 717 #define target_thread_handle(ptid, handle, handle_len) \
 718    (the_target->thread_handle ? (*the_target->thread_handle) \
 719                                   (ptid, handle, handle_len) \
 720    : false)
 721
 722 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 723
 724 int set_desired_thread ();
 725
 726 const char *target_pid_to_str (ptid_t);
 727
 728 int target_can_do_hardware_single_step (void);
 729
 730 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 731
 732 #endif /* GDBSERVER_TARGET_H */