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