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