gdbserver/target.h

   1 /* Target operations for the remote server for GDB.
   2    Copyright (C) 2002-2020 Free Software Foundation, Inc.
   3
   4    Contributed by MontaVista Software.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GDBSERVER_TARGET_H
  22 #define GDBSERVER_TARGET_H
  23
  24 #include <sys/types.h> /* for mode_t */
  25 #include "target/target.h"
  26 #include "target/resume.h"
  27 #include "target/wait.h"
  28 #include "target/waitstatus.h"
  29 #include "mem-break.h"
  30 #include "gdbsupport/btrace-common.h"
  31 #include <vector>
  32
  33 struct emit_ops;
  34 struct buffer;
  35 struct process_info;
  36
  37 /* This structure describes how to resume a particular thread (or all
  38    threads) based on the client's request.  If thread is -1, then this
  39    entry applies to all threads.  These are passed around as an
  40    array.  */
  41
  42 struct thread_resume
  43 {
  44   ptid_t thread;
  45
  46   /* How to "resume".  */
  47   enum resume_kind kind;
  48
  49   /* If non-zero, send this signal when we resume, or to stop the
  50      thread.  If stopping a thread, and this is 0, the target should
  51      stop the thread however it best decides to (e.g., SIGSTOP on
  52      linux; SuspendThread on win32).  This is a host signal value (not
  53      enum gdb_signal).  */
  54   int sig;
  55
  56   /* Range to single step within.  Valid only iff KIND is resume_step.
  57
  58      Single-step once, and then continuing stepping as long as the
  59      thread stops in this range.  (If the range is empty
  60      [STEP_RANGE_START == STEP_RANGE_END], then this is a single-step
  61      request.)  */
  62   CORE_ADDR step_range_start;   /* Inclusive */
  63   CORE_ADDR step_range_end;     /* Exclusive */
  64 };
  65
  66 class process_target;
  67
  68 /* GDBserver doesn't have a concept of strata like GDB, but we call
  69    its target vector "process_stratum" anyway for the benefit of
  70    shared code.  */
  71 struct process_stratum_target
  72 {
  73   /* Returns true if GDB Z breakpoint type TYPE is supported, false
  74      otherwise.  The type is coded as follows:
  75        '0' - software-breakpoint
  76        '1' - hardware-breakpoint
  77        '2' - write watchpoint
  78        '3' - read watchpoint
  79        '4' - access watchpoint
  80   */
  81   int (*supports_z_point_type) (char z_type);
  82
  83   /* Insert and remove a break or watchpoint.
  84      Returns 0 on success, -1 on failure and 1 on unsupported.  */
  85
  86   int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
  87                        int size, struct raw_breakpoint *bp);
  88   int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
  89                        int size, struct raw_breakpoint *bp);
  90
  91   /* Returns 1 if the target stopped because it executed a software
  92      breakpoint instruction, 0 otherwise.  */
  93   int (*stopped_by_sw_breakpoint) (void);
  94
  95   /* Returns true if the target knows whether a trap was caused by a
  96      SW breakpoint triggering.  */
  97   int (*supports_stopped_by_sw_breakpoint) (void);
  98
  99   /* Returns 1 if the target stopped for a hardware breakpoint.  */
 100   int (*stopped_by_hw_breakpoint) (void);
 101
 102   /* Returns true if the target knows whether a trap was caused by a
 103      HW breakpoint triggering.  */
 104   int (*supports_stopped_by_hw_breakpoint) (void);
 105
 106   /* Returns true if the target can do hardware single step.  */
 107   int (*supports_hardware_single_step) (void);
 108
 109   /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise.  */
 110
 111   int (*stopped_by_watchpoint) (void);
 112
 113   /* Returns the address associated with the watchpoint that hit, if any;
 114      returns 0 otherwise.  */
 115
 116   CORE_ADDR (*stopped_data_address) (void);
 117
 118   /* Reports the text, data offsets of the executable.  This is
 119      needed for uclinux where the executable is relocated during load
 120      time.  */
 121
 122   int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
 123
 124   /* Fetch the address associated with a specific thread local storage
 125      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 126      Stores it in *ADDRESS and returns zero on success; otherwise returns
 127      an error code.  A return value of -1 means this system does not
 128      support the operation.  */
 129
 130   int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
 131                           CORE_ADDR load_module, CORE_ADDR *address);
 132
 133   /* Fill BUF with an hostio error packet representing the last hostio
 134      error.  */
 135   void (*hostio_last_error) (char *buf);
 136
 137   /* Read/Write OS data using qXfer packets.  */
 138   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
 139                        unsigned const char *writebuf, CORE_ADDR offset,
 140                        int len);
 141
 142   /* Read/Write extra signal info.  */
 143   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
 144                         unsigned const char *writebuf,
 145                         CORE_ADDR offset, int len);
 146
 147   int (*supports_non_stop) (void);
 148
 149   /* Enables async target events.  Returns the previous enable
 150      state.  */
 151   int (*async) (int enable);
 152
 153   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
 154      success, -1 otherwise.  */
 155   int (*start_non_stop) (int);
 156
 157   /* Returns true if the target supports multi-process debugging.  */
 158   int (*supports_multi_process) (void);
 159
 160   /* Returns true if fork events are supported.  */
 161   int (*supports_fork_events) (void);
 162
 163   /* Returns true if vfork events are supported.  */
 164   int (*supports_vfork_events) (void);
 165
 166   /* Returns true if exec events are supported.  */
 167   int (*supports_exec_events) (void);
 168
 169   /* Allows target to re-initialize connection-specific settings.  */
 170   void (*handle_new_gdb_connection) (void);
 171
 172   /* If not NULL, target-specific routine to process monitor command.
 173      Returns 1 if handled, or 0 to perform default processing.  */
 174   int (*handle_monitor_command) (char *);
 175
 176   /* Returns the core given a thread, or -1 if not known.  */
 177   int (*core_of_thread) (ptid_t);
 178
 179   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 180   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 181                        unsigned char *myaddr, unsigned int len);
 182
 183   /* Target specific qSupported support.  FEATURES is an array of
 184      features with COUNT elements.  */
 185   void (*process_qsupported) (char **features, int count);
 186
 187   /* Return 1 if the target supports tracepoints, 0 (or leave the
 188      callback NULL) otherwise.  */
 189   int (*supports_tracepoints) (void);
 190
 191   /* Read PC from REGCACHE.  */
 192   CORE_ADDR (*read_pc) (struct regcache *regcache);
 193
 194   /* Write PC to REGCACHE.  */
 195   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 196
 197   /* Return true if THREAD is known to be stopped now.  */
 198   int (*thread_stopped) (struct thread_info *thread);
 199
 200   /* Read Thread Information Block address.  */
 201   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 202
 203   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 204      be ignored until an unpause_all call unfreezes threads again.
 205      There can be nested calls to pause_all, so a freeze counter
 206      should be maintained.  */
 207   void (*pause_all) (int freeze);
 208
 209   /* Unpause all threads.  Threads that hadn't been resumed by the
 210      client should be left stopped.  Basically a pause/unpause call
 211      pair should not end up resuming threads that were stopped before
 212      the pause call.  */
 213   void (*unpause_all) (int unfreeze);
 214
 215   /* Stabilize all threads.  That is, force them out of jump pads.  */
 216   void (*stabilize_threads) (void);
 217
 218   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 219      tracepoint internal object as used by the IPA agent.  TPADDR is
 220      the address of tracepoint.  COLLECTOR is address of the function
 221      the jump pad redirects to.  LOCKADDR is the address of the jump
 222      pad lock object.  ORIG_SIZE is the size in bytes of the
 223      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 224      jump pad entry, and on return holds the address past the end of
 225      the created jump pad.  If a trampoline is created by the function,
 226      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 227      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 228      buffer containing a copy of the instruction at TPADDR.
 229      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 230      return the address range where the instruction at TPADDR was relocated
 231      to.  If an error occurs, the ERR may be used to pass on an error
 232      message.  */
 233   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 234                                            CORE_ADDR collector,
 235                                            CORE_ADDR lockaddr,
 236                                            ULONGEST orig_size,
 237                                            CORE_ADDR *jump_entry,
 238                                            CORE_ADDR *trampoline,
 239                                            ULONGEST *trampoline_size,
 240                                            unsigned char *jjump_pad_insn,
 241                                            ULONGEST *jjump_pad_insn_size,
 242                                            CORE_ADDR *adjusted_insn_addr,
 243                                            CORE_ADDR *adjusted_insn_addr_end,
 244                                            char *err);
 245
 246   /* Return the bytecode operations vector for the current inferior.
 247      Returns NULL if bytecode compilation is not supported.  */
 248   struct emit_ops *(*emit_ops) (void);
 249
 250   /* Returns true if the target supports disabling randomization.  */
 251   int (*supports_disable_randomization) (void);
 252
 253   /* Return the minimum length of an instruction that can be safely overwritten
 254      for use as a fast tracepoint.  */
 255   int (*get_min_fast_tracepoint_insn_len) (void);
 256
 257   /* Read solib info on SVR4 platforms.  */
 258   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 259                                unsigned const char *writebuf,
 260                                CORE_ADDR offset, int len);
 261
 262   /* Return true if target supports debugging agent.  */
 263   int (*supports_agent) (void);
 264
 265   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 266      target information struct for reading and for disabling branch trace.  */
 267   struct btrace_target_info *(*enable_btrace)
 268     (ptid_t ptid, const struct btrace_config *conf);
 269
 270   /* Disable branch tracing.
 271      Returns zero on success, non-zero otherwise.  */
 272   int (*disable_btrace) (struct btrace_target_info *tinfo);
 273
 274   /* Read branch trace data into buffer.
 275      Return 0 on success; print an error message into BUFFER and return -1,
 276      otherwise.  */
 277   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 278                       enum btrace_read_type type);
 279
 280   /* Read the branch trace configuration into BUFFER.
 281      Return 0 on success; print an error message into BUFFER and return -1
 282      otherwise.  */
 283   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 284
 285   /* Return true if target supports range stepping.  */
 286   int (*supports_range_stepping) (void);
 287
 288   /* Return the full absolute name of the executable file that was
 289      run to create the process PID.  If the executable file cannot
 290      be determined, NULL is returned.  Otherwise, a pointer to a
 291      character string containing the pathname is returned.  This
 292      string should be copied into a buffer by the client if the string
 293      will not be immediately used, or if it must persist.  */
 294   char *(*pid_to_exec_file) (int pid);
 295
 296   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 297      the filesystem as it appears to process PID.  Systems where all
 298      processes share a common filesystem should set this to NULL.
 299      If NULL, the caller should fall back to open(2).  */
 300   int (*multifs_open) (int pid, const char *filename,
 301                        int flags, mode_t mode);
 302
 303   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 304      in the filesystem as it appears to process PID.  Systems where
 305      all processes share a common filesystem should set this to NULL.
 306      If NULL, the caller should fall back to unlink(2).  */
 307   int (*multifs_unlink) (int pid, const char *filename);
 308
 309   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 310      operating in the filesystem as it appears to process PID.
 311      Systems where all processes share a common filesystem should
 312      set this to NULL.  If NULL, the caller should fall back to
 313      readlink(2).  */
 314   ssize_t (*multifs_readlink) (int pid, const char *filename,
 315                                char *buf, size_t bufsiz);
 316
 317   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 318      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 319      ARM) was present in the PC.  */
 320   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 321
 322   /* Return the software breakpoint from KIND.  KIND can have target
 323      specific meaning like the Z0 kind parameter.
 324      SIZE is set to the software breakpoint's length in memory.  */
 325   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 326
 327   /* Return the thread's name, or NULL if the target is unable to determine it.
 328      The returned value must not be freed by the caller.  */
 329   const char *(*thread_name) (ptid_t thread);
 330
 331   /* Return the breakpoint kind for this target based on the current
 332      processor state (e.g. the current instruction mode on ARM) and the
 333      PC.  The PCPTR is adjusted to the real memory location in case a flag
 334      (e.g., the Thumb bit on ARM) is present in the PC.  */
 335   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 336
 337   /* Returns true if the target can software single step.  */
 338   int (*supports_software_single_step) (void);
 339
 340   /* Return 1 if the target supports catch syscall, 0 (or leave the
 341      callback NULL) otherwise.  */
 342   int (*supports_catch_syscall) (void);
 343
 344   /* Return tdesc index for IPA.  */
 345   int (*get_ipa_tdesc_idx) (void);
 346
 347   /* Thread ID to (numeric) thread handle: Return true on success and
 348      false for failure.  Return pointer to thread handle via HANDLE
 349      and the handle's length via HANDLE_LEN.  */
 350   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 351
 352   /* The object that will gradually replace this struct.  */
 353   process_target *pt;
 354 };
 355
 356 class process_target
 357 {
 358 public:
 359
 360   virtual ~process_target () = default;
 361
 362   /* Start a new process.
 363
 364      PROGRAM is a path to the program to execute.
 365      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 366      to be passed to the inferior as ``argv'' (along with PROGRAM).
 367
 368      Returns the new PID on success, -1 on failure.  Registers the new
 369      process with the process list.  */
 370   virtual int create_inferior (const char *program,
 371                                const std::vector<char *> &program_args) = 0;
 372
 373   /* Do additional setup after a new process is created, including
 374      exec-wrapper completion.  */
 375   virtual void post_create_inferior ();
 376
 377   /* Attach to a running process.
 378
 379      PID is the process ID to attach to, specified by the user
 380      or a higher layer.
 381
 382      Returns -1 if attaching is unsupported, 0 on success, and calls
 383      error() otherwise.  */
 384   virtual int attach (unsigned long pid) = 0;
 385
 386   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 387   virtual int kill (process_info *proc) = 0;
 388
 389   /* Detach from process PROC.  Return -1 on failure, and 0 on
 390      success.  */
 391   virtual int detach (process_info *proc) = 0;
 392
 393   /* The inferior process has died.  Do what is right.  */
 394   virtual void mourn (process_info *proc) = 0;
 395
 396   /* Wait for process PID to exit.  */
 397   virtual void join (int pid) = 0;
 398
 399   /* Return true iff the thread with process ID PID is alive.  */
 400   virtual bool thread_alive (ptid_t pid) = 0;
 401
 402   /* Resume the inferior process.  */
 403   virtual void resume (thread_resume *resume_info, size_t n) = 0;
 404
 405   /* Wait for the inferior process or thread to change state.  Store
 406      status through argument pointer STATUS.
 407
 408      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 409      wait for any thread of process pid to do something.  Return ptid
 410      of child, or -1 in case of error; store status through argument
 411      pointer STATUS.  OPTIONS is a bit set of options defined as
 412      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 413      no child stop to report, return is
 414      null_ptid/TARGET_WAITKIND_IGNORE.  */
 415   virtual ptid_t wait (ptid_t ptid, target_waitstatus *status,
 416                        int options) = 0;
 417
 418   /* Fetch registers from the inferior process.
 419
 420      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 421   virtual void fetch_registers (regcache *regcache, int regno) = 0;
 422
 423   /* Store registers to the inferior process.
 424
 425      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 426   virtual void store_registers (regcache *regcache, int regno) = 0;
 427
 428   /* Prepare to read or write memory from the inferior process.
 429      Targets use this to do what is necessary to get the state of the
 430      inferior such that it is possible to access memory.
 431
 432      This should generally only be called from client facing routines,
 433      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 434      insertion routine.
 435
 436      Like `read_memory' and `write_memory' below, returns 0 on success
 437      and errno on failure.  */
 438   virtual int prepare_to_access_memory ();
 439
 440   /* Undo the effects of prepare_to_access_memory.  */
 441   virtual void done_accessing_memory ();
 442
 443   /* Read memory from the inferior process.  This should generally be
 444      called through read_inferior_memory, which handles breakpoint shadowing.
 445
 446      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 447
 448      Returns 0 on success and errno on failure.  */
 449   virtual int read_memory (CORE_ADDR memaddr, unsigned char *myaddr,
 450                            int len) = 0;
 451
 452   /* Write memory to the inferior process.  This should generally be
 453      called through target_write_memory, which handles breakpoint shadowing.
 454
 455      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 456
 457      Returns 0 on success and errno on failure.  */
 458   virtual int write_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 459                             int len) = 0;
 460
 461   /* Query GDB for the values of any symbols we're interested in.
 462      This function is called whenever we receive a "qSymbols::"
 463      query, which corresponds to every time more symbols (might)
 464      become available.  */
 465   virtual void look_up_symbols ();
 466
 467   /* Send an interrupt request to the inferior process,
 468      however is appropriate.  */
 469   virtual void request_interrupt () = 0;
 470
 471   /* Return true if the read_auxv target op is supported.  */
 472   virtual bool supports_read_auxv ();
 473
 474   /* Read auxiliary vector data from the inferior process.
 475
 476      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 477   virtual int read_auxv (CORE_ADDR offset, unsigned char *myaddr,
 478                          unsigned int len);
 479 };
 480
 481 extern process_stratum_target *the_target;
 482
 483 void set_target_ops (process_stratum_target *);
 484
 485 #define target_create_inferior(program, program_args)   \
 486   the_target->pt->create_inferior (program, program_args)
 487
 488 #define target_post_create_inferior()                    \
 489   the_target->pt->post_create_inferior ()
 490
 491 #define myattach(pid) \
 492   the_target->pt->attach (pid)
 493
 494 int kill_inferior (process_info *proc);
 495
 496 #define target_supports_fork_events() \
 497   (the_target->supports_fork_events ? \
 498    (*the_target->supports_fork_events) () : 0)
 499
 500 #define target_supports_vfork_events() \
 501   (the_target->supports_vfork_events ? \
 502    (*the_target->supports_vfork_events) () : 0)
 503
 504 #define target_supports_exec_events() \
 505   (the_target->supports_exec_events ? \
 506    (*the_target->supports_exec_events) () : 0)
 507
 508 #define target_handle_new_gdb_connection()               \
 509   do                                                     \
 510     {                                                    \
 511       if (the_target->handle_new_gdb_connection != NULL) \
 512         (*the_target->handle_new_gdb_connection) ();     \
 513     } while (0)
 514
 515 #define detach_inferior(proc) \
 516   the_target->pt->detach (proc)
 517
 518 #define mythread_alive(pid) \
 519   the_target->pt->thread_alive (pid)
 520
 521 #define fetch_inferior_registers(regcache, regno)       \
 522   the_target->pt->fetch_registers (regcache, regno)
 523
 524 #define store_inferior_registers(regcache, regno) \
 525   the_target->pt->store_registers (regcache, regno)
 526
 527 #define join_inferior(pid) \
 528   the_target->pt->join (pid)
 529
 530 #define target_supports_non_stop() \
 531   (the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
 532
 533 #define target_async(enable) \
 534   (the_target->async ? (*the_target->async) (enable) : 0)
 535
 536 #define target_process_qsupported(features, count)      \
 537   do                                                    \
 538     {                                                   \
 539       if (the_target->process_qsupported)               \
 540         the_target->process_qsupported (features, count); \
 541     } while (0)
 542
 543 #define target_supports_catch_syscall()                 \
 544   (the_target->supports_catch_syscall ?                 \
 545    (*the_target->supports_catch_syscall) () : 0)
 546
 547 #define target_get_ipa_tdesc_idx()                      \
 548   (the_target->get_ipa_tdesc_idx                        \
 549    ? (*the_target->get_ipa_tdesc_idx) () : 0)
 550
 551 #define target_supports_tracepoints()                   \
 552   (the_target->supports_tracepoints                     \
 553    ? (*the_target->supports_tracepoints) () : 0)
 554
 555 #define target_supports_fast_tracepoints()              \
 556   (the_target->install_fast_tracepoint_jump_pad != NULL)
 557
 558 #define target_get_min_fast_tracepoint_insn_len()       \
 559   (the_target->get_min_fast_tracepoint_insn_len         \
 560    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 561
 562 #define thread_stopped(thread) \
 563   (*the_target->thread_stopped) (thread)
 564
 565 #define pause_all(freeze)                       \
 566   do                                            \
 567     {                                           \
 568       if (the_target->pause_all)                \
 569         (*the_target->pause_all) (freeze);      \
 570     } while (0)
 571
 572 #define unpause_all(unfreeze)                   \
 573   do                                            \
 574     {                                           \
 575       if (the_target->unpause_all)              \
 576         (*the_target->unpause_all) (unfreeze);  \
 577     } while (0)
 578
 579 #define stabilize_threads()                     \
 580   do                                            \
 581     {                                           \
 582       if (the_target->stabilize_threads)        \
 583         (*the_target->stabilize_threads) ();    \
 584     } while (0)
 585
 586 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 587                                          collector, lockaddr,           \
 588                                          orig_size,                     \
 589                                          jump_entry,                    \
 590                                          trampoline, trampoline_size,   \
 591                                          jjump_pad_insn,                \
 592                                          jjump_pad_insn_size,           \
 593                                          adjusted_insn_addr,            \
 594                                          adjusted_insn_addr_end,        \
 595                                          err)                           \
 596   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 597                                                    collector,lockaddr,  \
 598                                                    orig_size, jump_entry, \
 599                                                    trampoline,          \
 600                                                    trampoline_size,     \
 601                                                    jjump_pad_insn,      \
 602                                                    jjump_pad_insn_size, \
 603                                                    adjusted_insn_addr,  \
 604                                                    adjusted_insn_addr_end, \
 605                                                    err)
 606
 607 #define target_emit_ops() \
 608   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 609
 610 #define target_supports_disable_randomization() \
 611   (the_target->supports_disable_randomization ? \
 612    (*the_target->supports_disable_randomization) () : 0)
 613
 614 #define target_supports_agent() \
 615   (the_target->supports_agent ? \
 616    (*the_target->supports_agent) () : 0)
 617
 618 static inline struct btrace_target_info *
 619 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 620 {
 621   if (the_target->enable_btrace == nullptr)
 622     error (_("Target does not support branch tracing."));
 623
 624   return (*the_target->enable_btrace) (ptid, conf);
 625 }
 626
 627 static inline int
 628 target_disable_btrace (struct btrace_target_info *tinfo)
 629 {
 630   if (the_target->disable_btrace == nullptr)
 631     error (_("Target does not support branch tracing."));
 632
 633   return (*the_target->disable_btrace) (tinfo);
 634 }
 635
 636 static inline int
 637 target_read_btrace (struct btrace_target_info *tinfo,
 638                     struct buffer *buffer,
 639                     enum btrace_read_type type)
 640 {
 641   if (the_target->read_btrace == nullptr)
 642     error (_("Target does not support branch tracing."));
 643
 644   return (*the_target->read_btrace) (tinfo, buffer, type);
 645 }
 646
 647 static inline int
 648 target_read_btrace_conf (struct btrace_target_info *tinfo,
 649                          struct buffer *buffer)
 650 {
 651   if (the_target->read_btrace_conf == nullptr)
 652     error (_("Target does not support branch tracing."));
 653
 654   return (*the_target->read_btrace_conf) (tinfo, buffer);
 655 }
 656
 657 #define target_supports_range_stepping() \
 658   (the_target->supports_range_stepping ? \
 659    (*the_target->supports_range_stepping) () : 0)
 660
 661 #define target_supports_stopped_by_sw_breakpoint() \
 662   (the_target->supports_stopped_by_sw_breakpoint ? \
 663    (*the_target->supports_stopped_by_sw_breakpoint) () : 0)
 664
 665 #define target_stopped_by_sw_breakpoint() \
 666   (the_target->stopped_by_sw_breakpoint ? \
 667    (*the_target->stopped_by_sw_breakpoint) () : 0)
 668
 669 #define target_supports_stopped_by_hw_breakpoint() \
 670   (the_target->supports_stopped_by_hw_breakpoint ? \
 671    (*the_target->supports_stopped_by_hw_breakpoint) () : 0)
 672
 673 #define target_supports_hardware_single_step() \
 674   (the_target->supports_hardware_single_step ? \
 675    (*the_target->supports_hardware_single_step) () : 0)
 676
 677 #define target_stopped_by_hw_breakpoint() \
 678   (the_target->stopped_by_hw_breakpoint ? \
 679    (*the_target->stopped_by_hw_breakpoint) () : 0)
 680
 681 #define target_breakpoint_kind_from_pc(pcptr) \
 682   (the_target->breakpoint_kind_from_pc \
 683    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 684    : default_breakpoint_kind_from_pc (pcptr))
 685
 686 #define target_breakpoint_kind_from_current_state(pcptr) \
 687   (the_target->breakpoint_kind_from_current_state \
 688    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 689    : target_breakpoint_kind_from_pc (pcptr))
 690
 691 #define target_supports_software_single_step() \
 692   (the_target->supports_software_single_step ? \
 693    (*the_target->supports_software_single_step) () : 0)
 694
 695 /* Start non-stop mode, returns 0 on success, -1 on failure.   */
 696
 697 int start_non_stop (int nonstop);
 698
 699 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 700                int connected_wait);
 701
 702 /* Prepare to read or write memory from the inferior process.  See the
 703    corresponding process_stratum_target methods for more details.  */
 704
 705 int prepare_to_access_memory (void);
 706 void done_accessing_memory (void);
 707
 708 #define target_core_of_thread(ptid)             \
 709   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 710    : -1)
 711
 712 #define target_thread_name(ptid)                                \
 713   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 714    : NULL)
 715
 716 #define target_thread_handle(ptid, handle, handle_len) \
 717    (the_target->thread_handle ? (*the_target->thread_handle) \
 718                                   (ptid, handle, handle_len) \
 719    : false)
 720
 721 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 722
 723 int set_desired_thread ();
 724
 725 const char *target_pid_to_str (ptid_t);
 726
 727 int target_can_do_hardware_single_step (void);
 728
 729 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 730
 731 #endif /* GDBSERVER_TARGET_H */