gdb/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 /* GDBserver doesn't have a concept of strata like GDB, but we call
  67    its target vector "process_stratum" anyway for the benefit of
  68    shared code.  */
  69 struct process_stratum_target
  70 {
  71   /* Start a new process.
  72
  73      PROGRAM is a path to the program to execute.
  74      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
  75      to be passed to the inferior as ``argv'' (along with PROGRAM).
  76
  77      Returns the new PID on success, -1 on failure.  Registers the new
  78      process with the process list.  */
  79   int (*create_inferior) (const char *program,
  80                           const std::vector<char *> &program_args);
  81
  82   /* Do additional setup after a new process is created, including
  83      exec-wrapper completion.  */
  84   void (*post_create_inferior) (void);
  85
  86   /* Attach to a running process.
  87
  88      PID is the process ID to attach to, specified by the user
  89      or a higher layer.
  90
  91      Returns -1 if attaching is unsupported, 0 on success, and calls
  92      error() otherwise.  */
  93
  94   int (*attach) (unsigned long pid);
  95
  96   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
  97
  98   int (*kill) (process_info *proc);
  99
 100   /* Detach from process PROC.  Return -1 on failure, and 0 on
 101      success.  */
 102
 103   int (*detach) (process_info *proc);
 104
 105   /* The inferior process has died.  Do what is right.  */
 106
 107   void (*mourn) (struct process_info *proc);
 108
 109   /* Wait for process PID to exit.  */
 110
 111   void (*join) (int pid);
 112
 113   /* Return 1 iff the thread with process ID PID is alive.  */
 114
 115   int (*thread_alive) (ptid_t pid);
 116
 117   /* Resume the inferior process.  */
 118
 119   void (*resume) (struct thread_resume *resume_info, size_t n);
 120
 121   /* Wait for the inferior process or thread to change state.  Store
 122      status through argument pointer STATUS.
 123
 124      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 125      wait for any thread of process pid to do something.  Return ptid
 126      of child, or -1 in case of error; store status through argument
 127      pointer STATUS.  OPTIONS is a bit set of options defined as
 128      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 129      no child stop to report, return is
 130      null_ptid/TARGET_WAITKIND_IGNORE.  */
 131
 132   ptid_t (*wait) (ptid_t ptid, struct target_waitstatus *status, int options);
 133
 134   /* Fetch registers from the inferior process.
 135
 136      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 137
 138   void (*fetch_registers) (struct regcache *regcache, int regno);
 139
 140   /* Store registers to the inferior process.
 141
 142      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 143
 144   void (*store_registers) (struct regcache *regcache, int regno);
 145
 146   /* Prepare to read or write memory from the inferior process.
 147      Targets use this to do what is necessary to get the state of the
 148      inferior such that it is possible to access memory.
 149
 150      This should generally only be called from client facing routines,
 151      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 152      insertion routine.
 153
 154      Like `read_memory' and `write_memory' below, returns 0 on success
 155      and errno on failure.  */
 156
 157   int (*prepare_to_access_memory) (void);
 158
 159   /* Undo the effects of prepare_to_access_memory.  */
 160
 161   void (*done_accessing_memory) (void);
 162
 163   /* Read memory from the inferior process.  This should generally be
 164      called through read_inferior_memory, which handles breakpoint shadowing.
 165
 166      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 167
 168      Returns 0 on success and errno on failure.  */
 169
 170   int (*read_memory) (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 171
 172   /* Write memory to the inferior process.  This should generally be
 173      called through target_write_memory, which handles breakpoint shadowing.
 174
 175      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 176
 177      Returns 0 on success and errno on failure.  */
 178
 179   int (*write_memory) (CORE_ADDR memaddr, const unsigned char *myaddr,
 180                        int len);
 181
 182   /* Query GDB for the values of any symbols we're interested in.
 183      This function is called whenever we receive a "qSymbols::"
 184      query, which corresponds to every time more symbols (might)
 185      become available.  NULL if we aren't interested in any
 186      symbols.  */
 187
 188   void (*look_up_symbols) (void);
 189
 190   /* Send an interrupt request to the inferior process,
 191      however is appropriate.  */
 192
 193   void (*request_interrupt) (void);
 194
 195   /* Read auxiliary vector data from the inferior process.
 196
 197      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 198
 199   int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
 200                     unsigned int len);
 201
 202   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 203      otherwise.  The type is coded as follows:
 204        '0' - software-breakpoint
 205        '1' - hardware-breakpoint
 206        '2' - write watchpoint
 207        '3' - read watchpoint
 208        '4' - access watchpoint
 209   */
 210   int (*supports_z_point_type) (char z_type);
 211
 212   /* Insert and remove a break or watchpoint.
 213      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 214
 215   int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 216                        int size, struct raw_breakpoint *bp);
 217   int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 218                        int size, struct raw_breakpoint *bp);
 219
 220   /* Returns 1 if the target stopped because it executed a software
 221      breakpoint instruction, 0 otherwise.  */
 222   int (*stopped_by_sw_breakpoint) (void);
 223
 224   /* Returns true if the target knows whether a trap was caused by a
 225      SW breakpoint triggering.  */
 226   int (*supports_stopped_by_sw_breakpoint) (void);
 227
 228   /* Returns 1 if the target stopped for a hardware breakpoint.  */
 229   int (*stopped_by_hw_breakpoint) (void);
 230
 231   /* Returns true if the target knows whether a trap was caused by a
 232      HW breakpoint triggering.  */
 233   int (*supports_stopped_by_hw_breakpoint) (void);
 234
 235   /* Returns true if the target can do hardware single step.  */
 236   int (*supports_hardware_single_step) (void);
 237
 238   /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise.  */
 239
 240   int (*stopped_by_watchpoint) (void);
 241
 242   /* Returns the address associated with the watchpoint that hit, if any;
 243      returns 0 otherwise.  */
 244
 245   CORE_ADDR (*stopped_data_address) (void);
 246
 247   /* Reports the text, data offsets of the executable.  This is
 248      needed for uclinux where the executable is relocated during load
 249      time.  */
 250
 251   int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
 252
 253   /* Fetch the address associated with a specific thread local storage
 254      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 255      Stores it in *ADDRESS and returns zero on success; otherwise returns
 256      an error code.  A return value of -1 means this system does not
 257      support the operation.  */
 258
 259   int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
 260                           CORE_ADDR load_module, CORE_ADDR *address);
 261
 262   /* Fill BUF with an hostio error packet representing the last hostio
 263      error.  */
 264   void (*hostio_last_error) (char *buf);
 265
 266   /* Read/Write OS data using qXfer packets.  */
 267   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
 268                        unsigned const char *writebuf, CORE_ADDR offset,
 269                        int len);
 270
 271   /* Read/Write extra signal info.  */
 272   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
 273                         unsigned const char *writebuf,
 274                         CORE_ADDR offset, int len);
 275
 276   int (*supports_non_stop) (void);
 277
 278   /* Enables async target events.  Returns the previous enable
 279      state.  */
 280   int (*async) (int enable);
 281
 282   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
 283      success, -1 otherwise.  */
 284   int (*start_non_stop) (int);
 285
 286   /* Returns true if the target supports multi-process debugging.  */
 287   int (*supports_multi_process) (void);
 288
 289   /* Returns true if fork events are supported.  */
 290   int (*supports_fork_events) (void);
 291
 292   /* Returns true if vfork events are supported.  */
 293   int (*supports_vfork_events) (void);
 294
 295   /* Returns true if exec events are supported.  */
 296   int (*supports_exec_events) (void);
 297
 298   /* Allows target to re-initialize connection-specific settings.  */
 299   void (*handle_new_gdb_connection) (void);
 300
 301   /* If not NULL, target-specific routine to process monitor command.
 302      Returns 1 if handled, or 0 to perform default processing.  */
 303   int (*handle_monitor_command) (char *);
 304
 305   /* Returns the core given a thread, or -1 if not known.  */
 306   int (*core_of_thread) (ptid_t);
 307
 308   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 309   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 310                        unsigned char *myaddr, unsigned int len);
 311
 312   /* Target specific qSupported support.  FEATURES is an array of
 313      features with COUNT elements.  */
 314   void (*process_qsupported) (char **features, int count);
 315
 316   /* Return 1 if the target supports tracepoints, 0 (or leave the
 317      callback NULL) otherwise.  */
 318   int (*supports_tracepoints) (void);
 319
 320   /* Read PC from REGCACHE.  */
 321   CORE_ADDR (*read_pc) (struct regcache *regcache);
 322
 323   /* Write PC to REGCACHE.  */
 324   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 325
 326   /* Return true if THREAD is known to be stopped now.  */
 327   int (*thread_stopped) (struct thread_info *thread);
 328
 329   /* Read Thread Information Block address.  */
 330   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 331
 332   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 333      be ignored until an unpause_all call unfreezes threads again.
 334      There can be nested calls to pause_all, so a freeze counter
 335      should be maintained.  */
 336   void (*pause_all) (int freeze);
 337
 338   /* Unpause all threads.  Threads that hadn't been resumed by the
 339      client should be left stopped.  Basically a pause/unpause call
 340      pair should not end up resuming threads that were stopped before
 341      the pause call.  */
 342   void (*unpause_all) (int unfreeze);
 343
 344   /* Stabilize all threads.  That is, force them out of jump pads.  */
 345   void (*stabilize_threads) (void);
 346
 347   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 348      tracepoint internal object as used by the IPA agent.  TPADDR is
 349      the address of tracepoint.  COLLECTOR is address of the function
 350      the jump pad redirects to.  LOCKADDR is the address of the jump
 351      pad lock object.  ORIG_SIZE is the size in bytes of the
 352      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 353      jump pad entry, and on return holds the address past the end of
 354      the created jump pad.  If a trampoline is created by the function,
 355      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 356      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 357      buffer containing a copy of the instruction at TPADDR.
 358      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 359      return the address range where the instruction at TPADDR was relocated
 360      to.  If an error occurs, the ERR may be used to pass on an error
 361      message.  */
 362   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 363                                            CORE_ADDR collector,
 364                                            CORE_ADDR lockaddr,
 365                                            ULONGEST orig_size,
 366                                            CORE_ADDR *jump_entry,
 367                                            CORE_ADDR *trampoline,
 368                                            ULONGEST *trampoline_size,
 369                                            unsigned char *jjump_pad_insn,
 370                                            ULONGEST *jjump_pad_insn_size,
 371                                            CORE_ADDR *adjusted_insn_addr,
 372                                            CORE_ADDR *adjusted_insn_addr_end,
 373                                            char *err);
 374
 375   /* Return the bytecode operations vector for the current inferior.
 376      Returns NULL if bytecode compilation is not supported.  */
 377   struct emit_ops *(*emit_ops) (void);
 378
 379   /* Returns true if the target supports disabling randomization.  */
 380   int (*supports_disable_randomization) (void);
 381
 382   /* Return the minimum length of an instruction that can be safely overwritten
 383      for use as a fast tracepoint.  */
 384   int (*get_min_fast_tracepoint_insn_len) (void);
 385
 386   /* Read solib info on SVR4 platforms.  */
 387   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 388                                unsigned const char *writebuf,
 389                                CORE_ADDR offset, int len);
 390
 391   /* Return true if target supports debugging agent.  */
 392   int (*supports_agent) (void);
 393
 394   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 395      target information struct for reading and for disabling branch trace.  */
 396   struct btrace_target_info *(*enable_btrace)
 397     (ptid_t ptid, const struct btrace_config *conf);
 398
 399   /* Disable branch tracing.
 400      Returns zero on success, non-zero otherwise.  */
 401   int (*disable_btrace) (struct btrace_target_info *tinfo);
 402
 403   /* Read branch trace data into buffer.
 404      Return 0 on success; print an error message into BUFFER and return -1,
 405      otherwise.  */
 406   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 407                       enum btrace_read_type type);
 408
 409   /* Read the branch trace configuration into BUFFER.
 410      Return 0 on success; print an error message into BUFFER and return -1
 411      otherwise.  */
 412   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 413
 414   /* Return true if target supports range stepping.  */
 415   int (*supports_range_stepping) (void);
 416
 417   /* Return the full absolute name of the executable file that was
 418      run to create the process PID.  If the executable file cannot
 419      be determined, NULL is returned.  Otherwise, a pointer to a
 420      character string containing the pathname is returned.  This
 421      string should be copied into a buffer by the client if the string
 422      will not be immediately used, or if it must persist.  */
 423   char *(*pid_to_exec_file) (int pid);
 424
 425   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 426      the filesystem as it appears to process PID.  Systems where all
 427      processes share a common filesystem should set this to NULL.
 428      If NULL, the caller should fall back to open(2).  */
 429   int (*multifs_open) (int pid, const char *filename,
 430                        int flags, mode_t mode);
 431
 432   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 433      in the filesystem as it appears to process PID.  Systems where
 434      all processes share a common filesystem should set this to NULL.
 435      If NULL, the caller should fall back to unlink(2).  */
 436   int (*multifs_unlink) (int pid, const char *filename);
 437
 438   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 439      operating in the filesystem as it appears to process PID.
 440      Systems where all processes share a common filesystem should
 441      set this to NULL.  If NULL, the caller should fall back to
 442      readlink(2).  */
 443   ssize_t (*multifs_readlink) (int pid, const char *filename,
 444                                char *buf, size_t bufsiz);
 445
 446   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 447      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 448      ARM) was present in the PC.  */
 449   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 450
 451   /* Return the software breakpoint from KIND.  KIND can have target
 452      specific meaning like the Z0 kind parameter.
 453      SIZE is set to the software breakpoint's length in memory.  */
 454   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 455
 456   /* Return the thread's name, or NULL if the target is unable to determine it.
 457      The returned value must not be freed by the caller.  */
 458   const char *(*thread_name) (ptid_t thread);
 459
 460   /* Return the breakpoint kind for this target based on the current
 461      processor state (e.g. the current instruction mode on ARM) and the
 462      PC.  The PCPTR is adjusted to the real memory location in case a flag
 463      (e.g., the Thumb bit on ARM) is present in the PC.  */
 464   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 465
 466   /* Returns true if the target can software single step.  */
 467   int (*supports_software_single_step) (void);
 468
 469   /* Return 1 if the target supports catch syscall, 0 (or leave the
 470      callback NULL) otherwise.  */
 471   int (*supports_catch_syscall) (void);
 472
 473   /* Return tdesc index for IPA.  */
 474   int (*get_ipa_tdesc_idx) (void);
 475
 476   /* Thread ID to (numeric) thread handle: Return true on success and
 477      false for failure.  Return pointer to thread handle via HANDLE
 478      and the handle's length via HANDLE_LEN.  */
 479   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 480 };
 481
 482 extern process_stratum_target *the_target;
 483
 484 void set_target_ops (process_stratum_target *);
 485
 486 #define create_inferior(program, program_args)  \
 487   (*the_target->create_inferior) (program, program_args)
 488
 489 #define target_post_create_inferior()                    \
 490   do                                                     \
 491     {                                                    \
 492       if (the_target->post_create_inferior != NULL)      \
 493         (*the_target->post_create_inferior) ();          \
 494     } while (0)
 495
 496 #define myattach(pid) \
 497   (*the_target->attach) (pid)
 498
 499 int kill_inferior (process_info *proc);
 500
 501 #define target_supports_fork_events() \
 502   (the_target->supports_fork_events ? \
 503    (*the_target->supports_fork_events) () : 0)
 504
 505 #define target_supports_vfork_events() \
 506   (the_target->supports_vfork_events ? \
 507    (*the_target->supports_vfork_events) () : 0)
 508
 509 #define target_supports_exec_events() \
 510   (the_target->supports_exec_events ? \
 511    (*the_target->supports_exec_events) () : 0)
 512
 513 #define target_handle_new_gdb_connection()               \
 514   do                                                     \
 515     {                                                    \
 516       if (the_target->handle_new_gdb_connection != NULL) \
 517         (*the_target->handle_new_gdb_connection) ();     \
 518     } while (0)
 519
 520 #define detach_inferior(proc) \
 521   (*the_target->detach) (proc)
 522
 523 #define mythread_alive(pid) \
 524   (*the_target->thread_alive) (pid)
 525
 526 #define fetch_inferior_registers(regcache, regno)       \
 527   (*the_target->fetch_registers) (regcache, regno)
 528
 529 #define store_inferior_registers(regcache, regno) \
 530   (*the_target->store_registers) (regcache, regno)
 531
 532 #define join_inferior(pid) \
 533   (*the_target->join) (pid)
 534
 535 #define target_supports_non_stop() \
 536   (the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
 537
 538 #define target_async(enable) \
 539   (the_target->async ? (*the_target->async) (enable) : 0)
 540
 541 #define target_process_qsupported(features, count)      \
 542   do                                                    \
 543     {                                                   \
 544       if (the_target->process_qsupported)               \
 545         the_target->process_qsupported (features, count); \
 546     } while (0)
 547
 548 #define target_supports_catch_syscall()                 \
 549   (the_target->supports_catch_syscall ?                 \
 550    (*the_target->supports_catch_syscall) () : 0)
 551
 552 #define target_get_ipa_tdesc_idx()                      \
 553   (the_target->get_ipa_tdesc_idx                        \
 554    ? (*the_target->get_ipa_tdesc_idx) () : 0)
 555
 556 #define target_supports_tracepoints()                   \
 557   (the_target->supports_tracepoints                     \
 558    ? (*the_target->supports_tracepoints) () : 0)
 559
 560 #define target_supports_fast_tracepoints()              \
 561   (the_target->install_fast_tracepoint_jump_pad != NULL)
 562
 563 #define target_get_min_fast_tracepoint_insn_len()       \
 564   (the_target->get_min_fast_tracepoint_insn_len         \
 565    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 566
 567 #define thread_stopped(thread) \
 568   (*the_target->thread_stopped) (thread)
 569
 570 #define pause_all(freeze)                       \
 571   do                                            \
 572     {                                           \
 573       if (the_target->pause_all)                \
 574         (*the_target->pause_all) (freeze);      \
 575     } while (0)
 576
 577 #define unpause_all(unfreeze)                   \
 578   do                                            \
 579     {                                           \
 580       if (the_target->unpause_all)              \
 581         (*the_target->unpause_all) (unfreeze);  \
 582     } while (0)
 583
 584 #define stabilize_threads()                     \
 585   do                                            \
 586     {                                           \
 587       if (the_target->stabilize_threads)        \
 588         (*the_target->stabilize_threads) ();    \
 589     } while (0)
 590
 591 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 592                                          collector, lockaddr,           \
 593                                          orig_size,                     \
 594                                          jump_entry,                    \
 595                                          trampoline, trampoline_size,   \
 596                                          jjump_pad_insn,                \
 597                                          jjump_pad_insn_size,           \
 598                                          adjusted_insn_addr,            \
 599                                          adjusted_insn_addr_end,        \
 600                                          err)                           \
 601   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 602                                                    collector,lockaddr,  \
 603                                                    orig_size, jump_entry, \
 604                                                    trampoline,          \
 605                                                    trampoline_size,     \
 606                                                    jjump_pad_insn,      \
 607                                                    jjump_pad_insn_size, \
 608                                                    adjusted_insn_addr,  \
 609                                                    adjusted_insn_addr_end, \
 610                                                    err)
 611
 612 #define target_emit_ops() \
 613   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 614
 615 #define target_supports_disable_randomization() \
 616   (the_target->supports_disable_randomization ? \
 617    (*the_target->supports_disable_randomization) () : 0)
 618
 619 #define target_supports_agent() \
 620   (the_target->supports_agent ? \
 621    (*the_target->supports_agent) () : 0)
 622
 623 static inline struct btrace_target_info *
 624 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 625 {
 626   if (the_target->enable_btrace == nullptr)
 627     error (_("Target does not support branch tracing."));
 628
 629   return (*the_target->enable_btrace) (ptid, conf);
 630 }
 631
 632 static inline int
 633 target_disable_btrace (struct btrace_target_info *tinfo)
 634 {
 635   if (the_target->disable_btrace == nullptr)
 636     error (_("Target does not support branch tracing."));
 637
 638   return (*the_target->disable_btrace) (tinfo);
 639 }
 640
 641 static inline int
 642 target_read_btrace (struct btrace_target_info *tinfo,
 643                     struct buffer *buffer,
 644                     enum btrace_read_type type)
 645 {
 646   if (the_target->read_btrace == nullptr)
 647     error (_("Target does not support branch tracing."));
 648
 649   return (*the_target->read_btrace) (tinfo, buffer, type);
 650 }
 651
 652 static inline int
 653 target_read_btrace_conf (struct btrace_target_info *tinfo,
 654                          struct buffer *buffer)
 655 {
 656   if (the_target->read_btrace_conf == nullptr)
 657     error (_("Target does not support branch tracing."));
 658
 659   return (*the_target->read_btrace_conf) (tinfo, buffer);
 660 }
 661
 662 #define target_supports_range_stepping() \
 663   (the_target->supports_range_stepping ? \
 664    (*the_target->supports_range_stepping) () : 0)
 665
 666 #define target_supports_stopped_by_sw_breakpoint() \
 667   (the_target->supports_stopped_by_sw_breakpoint ? \
 668    (*the_target->supports_stopped_by_sw_breakpoint) () : 0)
 669
 670 #define target_stopped_by_sw_breakpoint() \
 671   (the_target->stopped_by_sw_breakpoint ? \
 672    (*the_target->stopped_by_sw_breakpoint) () : 0)
 673
 674 #define target_supports_stopped_by_hw_breakpoint() \
 675   (the_target->supports_stopped_by_hw_breakpoint ? \
 676    (*the_target->supports_stopped_by_hw_breakpoint) () : 0)
 677
 678 #define target_supports_hardware_single_step() \
 679   (the_target->supports_hardware_single_step ? \
 680    (*the_target->supports_hardware_single_step) () : 0)
 681
 682 #define target_stopped_by_hw_breakpoint() \
 683   (the_target->stopped_by_hw_breakpoint ? \
 684    (*the_target->stopped_by_hw_breakpoint) () : 0)
 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 /* Start non-stop mode, returns 0 on success, -1 on failure.   */
 701
 702 int start_non_stop (int nonstop);
 703
 704 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 705                int connected_wait);
 706
 707 /* Prepare to read or write memory from the inferior process.  See the
 708    corresponding process_stratum_target methods for more details.  */
 709
 710 int prepare_to_access_memory (void);
 711 void done_accessing_memory (void);
 712
 713 #define target_core_of_thread(ptid)             \
 714   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 715    : -1)
 716
 717 #define target_thread_name(ptid)                                \
 718   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 719    : NULL)
 720
 721 #define target_thread_handle(ptid, handle, handle_len) \
 722    (the_target->thread_handle ? (*the_target->thread_handle) \
 723                                   (ptid, handle, handle_len) \
 724    : false)
 725
 726 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 727
 728 int set_desired_thread ();
 729
 730 const char *target_pid_to_str (ptid_t);
 731
 732 int target_can_do_hardware_single_step (void);
 733
 734 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 735
 736 #endif /* GDBSERVER_TARGET_H */