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