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