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