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