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