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   /* Return 1 iff the thread with process ID PID is alive.  */
  74
  75   int (*thread_alive) (ptid_t pid);
  76
  77   /* Resume the inferior process.  */
  78
  79   void (*resume) (struct thread_resume *resume_info, size_t n);
  80
  81   /* Wait for the inferior process or thread to change state.  Store
  82      status through argument pointer STATUS.
  83
  84      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
  85      wait for any thread of process pid to do something.  Return ptid
  86      of child, or -1 in case of error; store status through argument
  87      pointer STATUS.  OPTIONS is a bit set of options defined as
  88      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
  89      no child stop to report, return is
  90      null_ptid/TARGET_WAITKIND_IGNORE.  */
  91
  92   ptid_t (*wait) (ptid_t ptid, struct target_waitstatus *status, int options);
  93
  94   /* Fetch registers from the inferior process.
  95
  96      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
  97
  98   void (*fetch_registers) (struct regcache *regcache, int regno);
  99
 100   /* Store registers to the inferior process.
 101
 102      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 103
 104   void (*store_registers) (struct regcache *regcache, int regno);
 105
 106   /* Prepare to read or write memory from the inferior process.
 107      Targets use this to do what is necessary to get the state of the
 108      inferior such that it is possible to access memory.
 109
 110      This should generally only be called from client facing routines,
 111      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 112      insertion routine.
 113
 114      Like `read_memory' and `write_memory' below, returns 0 on success
 115      and errno on failure.  */
 116
 117   int (*prepare_to_access_memory) (void);
 118
 119   /* Undo the effects of prepare_to_access_memory.  */
 120
 121   void (*done_accessing_memory) (void);
 122
 123   /* Read memory from the inferior process.  This should generally be
 124      called through read_inferior_memory, which handles breakpoint shadowing.
 125
 126      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 127
 128      Returns 0 on success and errno on failure.  */
 129
 130   int (*read_memory) (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 131
 132   /* Write memory to the inferior process.  This should generally be
 133      called through target_write_memory, which handles breakpoint shadowing.
 134
 135      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 136
 137      Returns 0 on success and errno on failure.  */
 138
 139   int (*write_memory) (CORE_ADDR memaddr, const unsigned char *myaddr,
 140                        int len);
 141
 142   /* Query GDB for the values of any symbols we're interested in.
 143      This function is called whenever we receive a "qSymbols::"
 144      query, which corresponds to every time more symbols (might)
 145      become available.  NULL if we aren't interested in any
 146      symbols.  */
 147
 148   void (*look_up_symbols) (void);
 149
 150   /* Send an interrupt request to the inferior process,
 151      however is appropriate.  */
 152
 153   void (*request_interrupt) (void);
 154
 155   /* Read auxiliary vector data from the inferior process.
 156
 157      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 158
 159   int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
 160                     unsigned int len);
 161
 162   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 163      otherwise.  The type is coded as follows:
 164        '0' - software-breakpoint
 165        '1' - hardware-breakpoint
 166        '2' - write watchpoint
 167        '3' - read watchpoint
 168        '4' - access watchpoint
 169   */
 170   int (*supports_z_point_type) (char z_type);
 171
 172   /* Insert and remove a break or watchpoint.
 173      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 174
 175   int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 176                        int size, struct raw_breakpoint *bp);
 177   int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 178                        int size, struct raw_breakpoint *bp);
 179
 180   /* Returns 1 if the target stopped because it executed a software
 181      breakpoint instruction, 0 otherwise.  */
 182   int (*stopped_by_sw_breakpoint) (void);
 183
 184   /* Returns true if the target knows whether a trap was caused by a
 185      SW breakpoint triggering.  */
 186   int (*supports_stopped_by_sw_breakpoint) (void);
 187
 188   /* Returns 1 if the target stopped for a hardware breakpoint.  */
 189   int (*stopped_by_hw_breakpoint) (void);
 190
 191   /* Returns true if the target knows whether a trap was caused by a
 192      HW breakpoint triggering.  */
 193   int (*supports_stopped_by_hw_breakpoint) (void);
 194
 195   /* Returns true if the target can do hardware single step.  */
 196   int (*supports_hardware_single_step) (void);
 197
 198   /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise.  */
 199
 200   int (*stopped_by_watchpoint) (void);
 201
 202   /* Returns the address associated with the watchpoint that hit, if any;
 203      returns 0 otherwise.  */
 204
 205   CORE_ADDR (*stopped_data_address) (void);
 206
 207   /* Reports the text, data offsets of the executable.  This is
 208      needed for uclinux where the executable is relocated during load
 209      time.  */
 210
 211   int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
 212
 213   /* Fetch the address associated with a specific thread local storage
 214      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 215      Stores it in *ADDRESS and returns zero on success; otherwise returns
 216      an error code.  A return value of -1 means this system does not
 217      support the operation.  */
 218
 219   int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
 220                           CORE_ADDR load_module, CORE_ADDR *address);
 221
 222   /* Fill BUF with an hostio error packet representing the last hostio
 223      error.  */
 224   void (*hostio_last_error) (char *buf);
 225
 226   /* Read/Write OS data using qXfer packets.  */
 227   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
 228                        unsigned const char *writebuf, CORE_ADDR offset,
 229                        int len);
 230
 231   /* Read/Write extra signal info.  */
 232   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
 233                         unsigned const char *writebuf,
 234                         CORE_ADDR offset, int len);
 235
 236   int (*supports_non_stop) (void);
 237
 238   /* Enables async target events.  Returns the previous enable
 239      state.  */
 240   int (*async) (int enable);
 241
 242   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
 243      success, -1 otherwise.  */
 244   int (*start_non_stop) (int);
 245
 246   /* Returns true if the target supports multi-process debugging.  */
 247   int (*supports_multi_process) (void);
 248
 249   /* Returns true if fork events are supported.  */
 250   int (*supports_fork_events) (void);
 251
 252   /* Returns true if vfork events are supported.  */
 253   int (*supports_vfork_events) (void);
 254
 255   /* Returns true if exec events are supported.  */
 256   int (*supports_exec_events) (void);
 257
 258   /* Allows target to re-initialize connection-specific settings.  */
 259   void (*handle_new_gdb_connection) (void);
 260
 261   /* If not NULL, target-specific routine to process monitor command.
 262      Returns 1 if handled, or 0 to perform default processing.  */
 263   int (*handle_monitor_command) (char *);
 264
 265   /* Returns the core given a thread, or -1 if not known.  */
 266   int (*core_of_thread) (ptid_t);
 267
 268   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 269   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 270                        unsigned char *myaddr, unsigned int len);
 271
 272   /* Target specific qSupported support.  FEATURES is an array of
 273      features with COUNT elements.  */
 274   void (*process_qsupported) (char **features, int count);
 275
 276   /* Return 1 if the target supports tracepoints, 0 (or leave the
 277      callback NULL) otherwise.  */
 278   int (*supports_tracepoints) (void);
 279
 280   /* Read PC from REGCACHE.  */
 281   CORE_ADDR (*read_pc) (struct regcache *regcache);
 282
 283   /* Write PC to REGCACHE.  */
 284   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 285
 286   /* Return true if THREAD is known to be stopped now.  */
 287   int (*thread_stopped) (struct thread_info *thread);
 288
 289   /* Read Thread Information Block address.  */
 290   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 291
 292   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 293      be ignored until an unpause_all call unfreezes threads again.
 294      There can be nested calls to pause_all, so a freeze counter
 295      should be maintained.  */
 296   void (*pause_all) (int freeze);
 297
 298   /* Unpause all threads.  Threads that hadn't been resumed by the
 299      client should be left stopped.  Basically a pause/unpause call
 300      pair should not end up resuming threads that were stopped before
 301      the pause call.  */
 302   void (*unpause_all) (int unfreeze);
 303
 304   /* Stabilize all threads.  That is, force them out of jump pads.  */
 305   void (*stabilize_threads) (void);
 306
 307   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 308      tracepoint internal object as used by the IPA agent.  TPADDR is
 309      the address of tracepoint.  COLLECTOR is address of the function
 310      the jump pad redirects to.  LOCKADDR is the address of the jump
 311      pad lock object.  ORIG_SIZE is the size in bytes of the
 312      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 313      jump pad entry, and on return holds the address past the end of
 314      the created jump pad.  If a trampoline is created by the function,
 315      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 316      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 317      buffer containing a copy of the instruction at TPADDR.
 318      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 319      return the address range where the instruction at TPADDR was relocated
 320      to.  If an error occurs, the ERR may be used to pass on an error
 321      message.  */
 322   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 323                                            CORE_ADDR collector,
 324                                            CORE_ADDR lockaddr,
 325                                            ULONGEST orig_size,
 326                                            CORE_ADDR *jump_entry,
 327                                            CORE_ADDR *trampoline,
 328                                            ULONGEST *trampoline_size,
 329                                            unsigned char *jjump_pad_insn,
 330                                            ULONGEST *jjump_pad_insn_size,
 331                                            CORE_ADDR *adjusted_insn_addr,
 332                                            CORE_ADDR *adjusted_insn_addr_end,
 333                                            char *err);
 334
 335   /* Return the bytecode operations vector for the current inferior.
 336      Returns NULL if bytecode compilation is not supported.  */
 337   struct emit_ops *(*emit_ops) (void);
 338
 339   /* Returns true if the target supports disabling randomization.  */
 340   int (*supports_disable_randomization) (void);
 341
 342   /* Return the minimum length of an instruction that can be safely overwritten
 343      for use as a fast tracepoint.  */
 344   int (*get_min_fast_tracepoint_insn_len) (void);
 345
 346   /* Read solib info on SVR4 platforms.  */
 347   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 348                                unsigned const char *writebuf,
 349                                CORE_ADDR offset, int len);
 350
 351   /* Return true if target supports debugging agent.  */
 352   int (*supports_agent) (void);
 353
 354   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 355      target information struct for reading and for disabling branch trace.  */
 356   struct btrace_target_info *(*enable_btrace)
 357     (ptid_t ptid, const struct btrace_config *conf);
 358
 359   /* Disable branch tracing.
 360      Returns zero on success, non-zero otherwise.  */
 361   int (*disable_btrace) (struct btrace_target_info *tinfo);
 362
 363   /* Read branch trace data into buffer.
 364      Return 0 on success; print an error message into BUFFER and return -1,
 365      otherwise.  */
 366   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 367                       enum btrace_read_type type);
 368
 369   /* Read the branch trace configuration into BUFFER.
 370      Return 0 on success; print an error message into BUFFER and return -1
 371      otherwise.  */
 372   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 373
 374   /* Return true if target supports range stepping.  */
 375   int (*supports_range_stepping) (void);
 376
 377   /* Return the full absolute name of the executable file that was
 378      run to create the process PID.  If the executable file cannot
 379      be determined, NULL is returned.  Otherwise, a pointer to a
 380      character string containing the pathname is returned.  This
 381      string should be copied into a buffer by the client if the string
 382      will not be immediately used, or if it must persist.  */
 383   char *(*pid_to_exec_file) (int pid);
 384
 385   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 386      the filesystem as it appears to process PID.  Systems where all
 387      processes share a common filesystem should set this to NULL.
 388      If NULL, the caller should fall back to open(2).  */
 389   int (*multifs_open) (int pid, const char *filename,
 390                        int flags, mode_t mode);
 391
 392   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 393      in the filesystem as it appears to process PID.  Systems where
 394      all processes share a common filesystem should set this to NULL.
 395      If NULL, the caller should fall back to unlink(2).  */
 396   int (*multifs_unlink) (int pid, const char *filename);
 397
 398   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 399      operating in the filesystem as it appears to process PID.
 400      Systems where all processes share a common filesystem should
 401      set this to NULL.  If NULL, the caller should fall back to
 402      readlink(2).  */
 403   ssize_t (*multifs_readlink) (int pid, const char *filename,
 404                                char *buf, size_t bufsiz);
 405
 406   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 407      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 408      ARM) was present in the PC.  */
 409   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 410
 411   /* Return the software breakpoint from KIND.  KIND can have target
 412      specific meaning like the Z0 kind parameter.
 413      SIZE is set to the software breakpoint's length in memory.  */
 414   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 415
 416   /* Return the thread's name, or NULL if the target is unable to determine it.
 417      The returned value must not be freed by the caller.  */
 418   const char *(*thread_name) (ptid_t thread);
 419
 420   /* Return the breakpoint kind for this target based on the current
 421      processor state (e.g. the current instruction mode on ARM) and the
 422      PC.  The PCPTR is adjusted to the real memory location in case a flag
 423      (e.g., the Thumb bit on ARM) is present in the PC.  */
 424   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 425
 426   /* Returns true if the target can software single step.  */
 427   int (*supports_software_single_step) (void);
 428
 429   /* Return 1 if the target supports catch syscall, 0 (or leave the
 430      callback NULL) otherwise.  */
 431   int (*supports_catch_syscall) (void);
 432
 433   /* Return tdesc index for IPA.  */
 434   int (*get_ipa_tdesc_idx) (void);
 435
 436   /* Thread ID to (numeric) thread handle: Return true on success and
 437      false for failure.  Return pointer to thread handle via HANDLE
 438      and the handle's length via HANDLE_LEN.  */
 439   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 440
 441   /* The object that will gradually replace this struct.  */
 442   process_target *pt;
 443 };
 444
 445 class process_target
 446 {
 447 public:
 448
 449   virtual ~process_target () = default;
 450
 451   /* Start a new process.
 452
 453      PROGRAM is a path to the program to execute.
 454      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 455      to be passed to the inferior as ``argv'' (along with PROGRAM).
 456
 457      Returns the new PID on success, -1 on failure.  Registers the new
 458      process with the process list.  */
 459   virtual int create_inferior (const char *program,
 460                                const std::vector<char *> &program_args) = 0;
 461
 462   /* Do additional setup after a new process is created, including
 463      exec-wrapper completion.  */
 464   virtual void post_create_inferior ();
 465
 466   /* Attach to a running process.
 467
 468      PID is the process ID to attach to, specified by the user
 469      or a higher layer.
 470
 471      Returns -1 if attaching is unsupported, 0 on success, and calls
 472      error() otherwise.  */
 473   virtual int attach (unsigned long pid) = 0;
 474
 475   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 476   virtual int kill (process_info *proc) = 0;
 477
 478   /* Detach from process PROC.  Return -1 on failure, and 0 on
 479      success.  */
 480   virtual int detach (process_info *proc) = 0;
 481
 482   /* The inferior process has died.  Do what is right.  */
 483   virtual void mourn (process_info *proc) = 0;
 484
 485   /* Wait for process PID to exit.  */
 486   virtual void join (int pid) = 0;
 487 };
 488
 489 extern process_stratum_target *the_target;
 490
 491 void set_target_ops (process_stratum_target *);
 492
 493 #define target_create_inferior(program, program_args)   \
 494   the_target->pt->create_inferior (program, program_args)
 495
 496 #define target_post_create_inferior()                    \
 497   the_target->pt->post_create_inferior ()
 498
 499 #define myattach(pid) \
 500   the_target->pt->attach (pid)
 501
 502 int kill_inferior (process_info *proc);
 503
 504 #define target_supports_fork_events() \
 505   (the_target->supports_fork_events ? \
 506    (*the_target->supports_fork_events) () : 0)
 507
 508 #define target_supports_vfork_events() \
 509   (the_target->supports_vfork_events ? \
 510    (*the_target->supports_vfork_events) () : 0)
 511
 512 #define target_supports_exec_events() \
 513   (the_target->supports_exec_events ? \
 514    (*the_target->supports_exec_events) () : 0)
 515
 516 #define target_handle_new_gdb_connection()               \
 517   do                                                     \
 518     {                                                    \
 519       if (the_target->handle_new_gdb_connection != NULL) \
 520         (*the_target->handle_new_gdb_connection) ();     \
 521     } while (0)
 522
 523 #define detach_inferior(proc) \
 524   the_target->pt->detach (proc)
 525
 526 #define mythread_alive(pid) \
 527   (*the_target->thread_alive) (pid)
 528
 529 #define fetch_inferior_registers(regcache, regno)       \
 530   (*the_target->fetch_registers) (regcache, regno)
 531
 532 #define store_inferior_registers(regcache, regno) \
 533   (*the_target->store_registers) (regcache, regno)
 534
 535 #define join_inferior(pid) \
 536   the_target->pt->join (pid)
 537
 538 #define target_supports_non_stop() \
 539   (the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
 540
 541 #define target_async(enable) \
 542   (the_target->async ? (*the_target->async) (enable) : 0)
 543
 544 #define target_process_qsupported(features, count)      \
 545   do                                                    \
 546     {                                                   \
 547       if (the_target->process_qsupported)               \
 548         the_target->process_qsupported (features, count); \
 549     } while (0)
 550
 551 #define target_supports_catch_syscall()                 \
 552   (the_target->supports_catch_syscall ?                 \
 553    (*the_target->supports_catch_syscall) () : 0)
 554
 555 #define target_get_ipa_tdesc_idx()                      \
 556   (the_target->get_ipa_tdesc_idx                        \
 557    ? (*the_target->get_ipa_tdesc_idx) () : 0)
 558
 559 #define target_supports_tracepoints()                   \
 560   (the_target->supports_tracepoints                     \
 561    ? (*the_target->supports_tracepoints) () : 0)
 562
 563 #define target_supports_fast_tracepoints()              \
 564   (the_target->install_fast_tracepoint_jump_pad != NULL)
 565
 566 #define target_get_min_fast_tracepoint_insn_len()       \
 567   (the_target->get_min_fast_tracepoint_insn_len         \
 568    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 569
 570 #define thread_stopped(thread) \
 571   (*the_target->thread_stopped) (thread)
 572
 573 #define pause_all(freeze)                       \
 574   do                                            \
 575     {                                           \
 576       if (the_target->pause_all)                \
 577         (*the_target->pause_all) (freeze);      \
 578     } while (0)
 579
 580 #define unpause_all(unfreeze)                   \
 581   do                                            \
 582     {                                           \
 583       if (the_target->unpause_all)              \
 584         (*the_target->unpause_all) (unfreeze);  \
 585     } while (0)
 586
 587 #define stabilize_threads()                     \
 588   do                                            \
 589     {                                           \
 590       if (the_target->stabilize_threads)        \
 591         (*the_target->stabilize_threads) ();    \
 592     } while (0)
 593
 594 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 595                                          collector, lockaddr,           \
 596                                          orig_size,                     \
 597                                          jump_entry,                    \
 598                                          trampoline, trampoline_size,   \
 599                                          jjump_pad_insn,                \
 600                                          jjump_pad_insn_size,           \
 601                                          adjusted_insn_addr,            \
 602                                          adjusted_insn_addr_end,        \
 603                                          err)                           \
 604   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 605                                                    collector,lockaddr,  \
 606                                                    orig_size, jump_entry, \
 607                                                    trampoline,          \
 608                                                    trampoline_size,     \
 609                                                    jjump_pad_insn,      \
 610                                                    jjump_pad_insn_size, \
 611                                                    adjusted_insn_addr,  \
 612                                                    adjusted_insn_addr_end, \
 613                                                    err)
 614
 615 #define target_emit_ops() \
 616   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 617
 618 #define target_supports_disable_randomization() \
 619   (the_target->supports_disable_randomization ? \
 620    (*the_target->supports_disable_randomization) () : 0)
 621
 622 #define target_supports_agent() \
 623   (the_target->supports_agent ? \
 624    (*the_target->supports_agent) () : 0)
 625
 626 static inline struct btrace_target_info *
 627 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 628 {
 629   if (the_target->enable_btrace == nullptr)
 630     error (_("Target does not support branch tracing."));
 631
 632   return (*the_target->enable_btrace) (ptid, conf);
 633 }
 634
 635 static inline int
 636 target_disable_btrace (struct btrace_target_info *tinfo)
 637 {
 638   if (the_target->disable_btrace == nullptr)
 639     error (_("Target does not support branch tracing."));
 640
 641   return (*the_target->disable_btrace) (tinfo);
 642 }
 643
 644 static inline int
 645 target_read_btrace (struct btrace_target_info *tinfo,
 646                     struct buffer *buffer,
 647                     enum btrace_read_type type)
 648 {
 649   if (the_target->read_btrace == nullptr)
 650     error (_("Target does not support branch tracing."));
 651
 652   return (*the_target->read_btrace) (tinfo, buffer, type);
 653 }
 654
 655 static inline int
 656 target_read_btrace_conf (struct btrace_target_info *tinfo,
 657                          struct buffer *buffer)
 658 {
 659   if (the_target->read_btrace_conf == nullptr)
 660     error (_("Target does not support branch tracing."));
 661
 662   return (*the_target->read_btrace_conf) (tinfo, buffer);
 663 }
 664
 665 #define target_supports_range_stepping() \
 666   (the_target->supports_range_stepping ? \
 667    (*the_target->supports_range_stepping) () : 0)
 668
 669 #define target_supports_stopped_by_sw_breakpoint() \
 670   (the_target->supports_stopped_by_sw_breakpoint ? \
 671    (*the_target->supports_stopped_by_sw_breakpoint) () : 0)
 672
 673 #define target_stopped_by_sw_breakpoint() \
 674   (the_target->stopped_by_sw_breakpoint ? \
 675    (*the_target->stopped_by_sw_breakpoint) () : 0)
 676
 677 #define target_supports_stopped_by_hw_breakpoint() \
 678   (the_target->supports_stopped_by_hw_breakpoint ? \
 679    (*the_target->supports_stopped_by_hw_breakpoint) () : 0)
 680
 681 #define target_supports_hardware_single_step() \
 682   (the_target->supports_hardware_single_step ? \
 683    (*the_target->supports_hardware_single_step) () : 0)
 684
 685 #define target_stopped_by_hw_breakpoint() \
 686   (the_target->stopped_by_hw_breakpoint ? \
 687    (*the_target->stopped_by_hw_breakpoint) () : 0)
 688
 689 #define target_breakpoint_kind_from_pc(pcptr) \
 690   (the_target->breakpoint_kind_from_pc \
 691    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 692    : default_breakpoint_kind_from_pc (pcptr))
 693
 694 #define target_breakpoint_kind_from_current_state(pcptr) \
 695   (the_target->breakpoint_kind_from_current_state \
 696    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 697    : target_breakpoint_kind_from_pc (pcptr))
 698
 699 #define target_supports_software_single_step() \
 700   (the_target->supports_software_single_step ? \
 701    (*the_target->supports_software_single_step) () : 0)
 702
 703 /* Start non-stop mode, returns 0 on success, -1 on failure.   */
 704
 705 int start_non_stop (int nonstop);
 706
 707 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 708                int connected_wait);
 709
 710 /* Prepare to read or write memory from the inferior process.  See the
 711    corresponding process_stratum_target methods for more details.  */
 712
 713 int prepare_to_access_memory (void);
 714 void done_accessing_memory (void);
 715
 716 #define target_core_of_thread(ptid)             \
 717   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 718    : -1)
 719
 720 #define target_thread_name(ptid)                                \
 721   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 722    : NULL)
 723
 724 #define target_thread_handle(ptid, handle, handle_len) \
 725    (the_target->thread_handle ? (*the_target->thread_handle) \
 726                                   (ptid, handle, handle_len) \
 727    : false)
 728
 729 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 730
 731 int set_desired_thread ();
 732
 733 const char *target_pid_to_str (ptid_t);
 734
 735 int target_can_do_hardware_single_step (void);
 736
 737 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 738
 739 #endif /* GDBSERVER_TARGET_H */