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