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   /* Detach from process PROC.  Return -1 on failure, and 0 on
  74      success.  */
  75
  76   int (*detach) (process_info *proc);
  77
  78   /* The inferior process has died.  Do what is right.  */
  79
  80   void (*mourn) (struct process_info *proc);
  81
  82   /* Wait for process PID to exit.  */
  83
  84   void (*join) (int pid);
  85
  86   /* Return 1 iff the thread with process ID PID is alive.  */
  87
  88   int (*thread_alive) (ptid_t pid);
  89
  90   /* Resume the inferior process.  */
  91
  92   void (*resume) (struct thread_resume *resume_info, size_t n);
  93
  94   /* Wait for the inferior process or thread to change state.  Store
  95      status through argument pointer STATUS.
  96
  97      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
  98      wait for any thread of process pid to do something.  Return ptid
  99      of child, or -1 in case of error; store status through argument
 100      pointer STATUS.  OPTIONS is a bit set of options defined as
 101      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 102      no child stop to report, return is
 103      null_ptid/TARGET_WAITKIND_IGNORE.  */
 104
 105   ptid_t (*wait) (ptid_t ptid, struct target_waitstatus *status, int options);
 106
 107   /* Fetch registers from the inferior process.
 108
 109      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 110
 111   void (*fetch_registers) (struct regcache *regcache, int regno);
 112
 113   /* Store registers to the inferior process.
 114
 115      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 116
 117   void (*store_registers) (struct regcache *regcache, int regno);
 118
 119   /* Prepare to read or write memory from the inferior process.
 120      Targets use this to do what is necessary to get the state of the
 121      inferior such that it is possible to access memory.
 122
 123      This should generally only be called from client facing routines,
 124      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 125      insertion routine.
 126
 127      Like `read_memory' and `write_memory' below, returns 0 on success
 128      and errno on failure.  */
 129
 130   int (*prepare_to_access_memory) (void);
 131
 132   /* Undo the effects of prepare_to_access_memory.  */
 133
 134   void (*done_accessing_memory) (void);
 135
 136   /* Read memory from the inferior process.  This should generally be
 137      called through read_inferior_memory, which handles breakpoint shadowing.
 138
 139      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 140
 141      Returns 0 on success and errno on failure.  */
 142
 143   int (*read_memory) (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 144
 145   /* Write memory to the inferior process.  This should generally be
 146      called through target_write_memory, which handles breakpoint shadowing.
 147
 148      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 149
 150      Returns 0 on success and errno on failure.  */
 151
 152   int (*write_memory) (CORE_ADDR memaddr, const unsigned char *myaddr,
 153                        int len);
 154
 155   /* Query GDB for the values of any symbols we're interested in.
 156      This function is called whenever we receive a "qSymbols::"
 157      query, which corresponds to every time more symbols (might)
 158      become available.  NULL if we aren't interested in any
 159      symbols.  */
 160
 161   void (*look_up_symbols) (void);
 162
 163   /* Send an interrupt request to the inferior process,
 164      however is appropriate.  */
 165
 166   void (*request_interrupt) (void);
 167
 168   /* Read auxiliary vector data from the inferior process.
 169
 170      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 171
 172   int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
 173                     unsigned int len);
 174
 175   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 176      otherwise.  The type is coded as follows:
 177        '0' - software-breakpoint
 178        '1' - hardware-breakpoint
 179        '2' - write watchpoint
 180        '3' - read watchpoint
 181        '4' - access watchpoint
 182   */
 183   int (*supports_z_point_type) (char z_type);
 184
 185   /* Insert and remove a break or watchpoint.
 186      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 187
 188   int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 189                        int size, struct raw_breakpoint *bp);
 190   int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 191                        int size, struct raw_breakpoint *bp);
 192
 193   /* Returns 1 if the target stopped because it executed a software
 194      breakpoint instruction, 0 otherwise.  */
 195   int (*stopped_by_sw_breakpoint) (void);
 196
 197   /* Returns true if the target knows whether a trap was caused by a
 198      SW breakpoint triggering.  */
 199   int (*supports_stopped_by_sw_breakpoint) (void);
 200
 201   /* Returns 1 if the target stopped for a hardware breakpoint.  */
 202   int (*stopped_by_hw_breakpoint) (void);
 203
 204   /* Returns true if the target knows whether a trap was caused by a
 205      HW breakpoint triggering.  */
 206   int (*supports_stopped_by_hw_breakpoint) (void);
 207
 208   /* Returns true if the target can do hardware single step.  */
 209   int (*supports_hardware_single_step) (void);
 210
 211   /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise.  */
 212
 213   int (*stopped_by_watchpoint) (void);
 214
 215   /* Returns the address associated with the watchpoint that hit, if any;
 216      returns 0 otherwise.  */
 217
 218   CORE_ADDR (*stopped_data_address) (void);
 219
 220   /* Reports the text, data offsets of the executable.  This is
 221      needed for uclinux where the executable is relocated during load
 222      time.  */
 223
 224   int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
 225
 226   /* Fetch the address associated with a specific thread local storage
 227      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 228      Stores it in *ADDRESS and returns zero on success; otherwise returns
 229      an error code.  A return value of -1 means this system does not
 230      support the operation.  */
 231
 232   int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
 233                           CORE_ADDR load_module, CORE_ADDR *address);
 234
 235   /* Fill BUF with an hostio error packet representing the last hostio
 236      error.  */
 237   void (*hostio_last_error) (char *buf);
 238
 239   /* Read/Write OS data using qXfer packets.  */
 240   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
 241                        unsigned const char *writebuf, CORE_ADDR offset,
 242                        int len);
 243
 244   /* Read/Write extra signal info.  */
 245   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
 246                         unsigned const char *writebuf,
 247                         CORE_ADDR offset, int len);
 248
 249   int (*supports_non_stop) (void);
 250
 251   /* Enables async target events.  Returns the previous enable
 252      state.  */
 253   int (*async) (int enable);
 254
 255   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
 256      success, -1 otherwise.  */
 257   int (*start_non_stop) (int);
 258
 259   /* Returns true if the target supports multi-process debugging.  */
 260   int (*supports_multi_process) (void);
 261
 262   /* Returns true if fork events are supported.  */
 263   int (*supports_fork_events) (void);
 264
 265   /* Returns true if vfork events are supported.  */
 266   int (*supports_vfork_events) (void);
 267
 268   /* Returns true if exec events are supported.  */
 269   int (*supports_exec_events) (void);
 270
 271   /* Allows target to re-initialize connection-specific settings.  */
 272   void (*handle_new_gdb_connection) (void);
 273
 274   /* If not NULL, target-specific routine to process monitor command.
 275      Returns 1 if handled, or 0 to perform default processing.  */
 276   int (*handle_monitor_command) (char *);
 277
 278   /* Returns the core given a thread, or -1 if not known.  */
 279   int (*core_of_thread) (ptid_t);
 280
 281   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 282   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 283                        unsigned char *myaddr, unsigned int len);
 284
 285   /* Target specific qSupported support.  FEATURES is an array of
 286      features with COUNT elements.  */
 287   void (*process_qsupported) (char **features, int count);
 288
 289   /* Return 1 if the target supports tracepoints, 0 (or leave the
 290      callback NULL) otherwise.  */
 291   int (*supports_tracepoints) (void);
 292
 293   /* Read PC from REGCACHE.  */
 294   CORE_ADDR (*read_pc) (struct regcache *regcache);
 295
 296   /* Write PC to REGCACHE.  */
 297   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 298
 299   /* Return true if THREAD is known to be stopped now.  */
 300   int (*thread_stopped) (struct thread_info *thread);
 301
 302   /* Read Thread Information Block address.  */
 303   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 304
 305   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 306      be ignored until an unpause_all call unfreezes threads again.
 307      There can be nested calls to pause_all, so a freeze counter
 308      should be maintained.  */
 309   void (*pause_all) (int freeze);
 310
 311   /* Unpause all threads.  Threads that hadn't been resumed by the
 312      client should be left stopped.  Basically a pause/unpause call
 313      pair should not end up resuming threads that were stopped before
 314      the pause call.  */
 315   void (*unpause_all) (int unfreeze);
 316
 317   /* Stabilize all threads.  That is, force them out of jump pads.  */
 318   void (*stabilize_threads) (void);
 319
 320   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 321      tracepoint internal object as used by the IPA agent.  TPADDR is
 322      the address of tracepoint.  COLLECTOR is address of the function
 323      the jump pad redirects to.  LOCKADDR is the address of the jump
 324      pad lock object.  ORIG_SIZE is the size in bytes of the
 325      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 326      jump pad entry, and on return holds the address past the end of
 327      the created jump pad.  If a trampoline is created by the function,
 328      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 329      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 330      buffer containing a copy of the instruction at TPADDR.
 331      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 332      return the address range where the instruction at TPADDR was relocated
 333      to.  If an error occurs, the ERR may be used to pass on an error
 334      message.  */
 335   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 336                                            CORE_ADDR collector,
 337                                            CORE_ADDR lockaddr,
 338                                            ULONGEST orig_size,
 339                                            CORE_ADDR *jump_entry,
 340                                            CORE_ADDR *trampoline,
 341                                            ULONGEST *trampoline_size,
 342                                            unsigned char *jjump_pad_insn,
 343                                            ULONGEST *jjump_pad_insn_size,
 344                                            CORE_ADDR *adjusted_insn_addr,
 345                                            CORE_ADDR *adjusted_insn_addr_end,
 346                                            char *err);
 347
 348   /* Return the bytecode operations vector for the current inferior.
 349      Returns NULL if bytecode compilation is not supported.  */
 350   struct emit_ops *(*emit_ops) (void);
 351
 352   /* Returns true if the target supports disabling randomization.  */
 353   int (*supports_disable_randomization) (void);
 354
 355   /* Return the minimum length of an instruction that can be safely overwritten
 356      for use as a fast tracepoint.  */
 357   int (*get_min_fast_tracepoint_insn_len) (void);
 358
 359   /* Read solib info on SVR4 platforms.  */
 360   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 361                                unsigned const char *writebuf,
 362                                CORE_ADDR offset, int len);
 363
 364   /* Return true if target supports debugging agent.  */
 365   int (*supports_agent) (void);
 366
 367   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 368      target information struct for reading and for disabling branch trace.  */
 369   struct btrace_target_info *(*enable_btrace)
 370     (ptid_t ptid, const struct btrace_config *conf);
 371
 372   /* Disable branch tracing.
 373      Returns zero on success, non-zero otherwise.  */
 374   int (*disable_btrace) (struct btrace_target_info *tinfo);
 375
 376   /* Read branch trace data into buffer.
 377      Return 0 on success; print an error message into BUFFER and return -1,
 378      otherwise.  */
 379   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 380                       enum btrace_read_type type);
 381
 382   /* Read the branch trace configuration into BUFFER.
 383      Return 0 on success; print an error message into BUFFER and return -1
 384      otherwise.  */
 385   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 386
 387   /* Return true if target supports range stepping.  */
 388   int (*supports_range_stepping) (void);
 389
 390   /* Return the full absolute name of the executable file that was
 391      run to create the process PID.  If the executable file cannot
 392      be determined, NULL is returned.  Otherwise, a pointer to a
 393      character string containing the pathname is returned.  This
 394      string should be copied into a buffer by the client if the string
 395      will not be immediately used, or if it must persist.  */
 396   char *(*pid_to_exec_file) (int pid);
 397
 398   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 399      the filesystem as it appears to process PID.  Systems where all
 400      processes share a common filesystem should set this to NULL.
 401      If NULL, the caller should fall back to open(2).  */
 402   int (*multifs_open) (int pid, const char *filename,
 403                        int flags, mode_t mode);
 404
 405   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 406      in the filesystem as it appears to process PID.  Systems where
 407      all processes share a common filesystem should set this to NULL.
 408      If NULL, the caller should fall back to unlink(2).  */
 409   int (*multifs_unlink) (int pid, const char *filename);
 410
 411   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 412      operating in the filesystem as it appears to process PID.
 413      Systems where all processes share a common filesystem should
 414      set this to NULL.  If NULL, the caller should fall back to
 415      readlink(2).  */
 416   ssize_t (*multifs_readlink) (int pid, const char *filename,
 417                                char *buf, size_t bufsiz);
 418
 419   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 420      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 421      ARM) was present in the PC.  */
 422   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 423
 424   /* Return the software breakpoint from KIND.  KIND can have target
 425      specific meaning like the Z0 kind parameter.
 426      SIZE is set to the software breakpoint's length in memory.  */
 427   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 428
 429   /* Return the thread's name, or NULL if the target is unable to determine it.
 430      The returned value must not be freed by the caller.  */
 431   const char *(*thread_name) (ptid_t thread);
 432
 433   /* Return the breakpoint kind for this target based on the current
 434      processor state (e.g. the current instruction mode on ARM) and the
 435      PC.  The PCPTR is adjusted to the real memory location in case a flag
 436      (e.g., the Thumb bit on ARM) is present in the PC.  */
 437   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 438
 439   /* Returns true if the target can software single step.  */
 440   int (*supports_software_single_step) (void);
 441
 442   /* Return 1 if the target supports catch syscall, 0 (or leave the
 443      callback NULL) otherwise.  */
 444   int (*supports_catch_syscall) (void);
 445
 446   /* Return tdesc index for IPA.  */
 447   int (*get_ipa_tdesc_idx) (void);
 448
 449   /* Thread ID to (numeric) thread handle: Return true on success and
 450      false for failure.  Return pointer to thread handle via HANDLE
 451      and the handle's length via HANDLE_LEN.  */
 452   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 453
 454   /* The object that will gradually replace this struct.  */
 455   process_target *pt;
 456 };
 457
 458 class process_target
 459 {
 460 public:
 461
 462   virtual ~process_target () = default;
 463
 464   /* Start a new process.
 465
 466      PROGRAM is a path to the program to execute.
 467      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 468      to be passed to the inferior as ``argv'' (along with PROGRAM).
 469
 470      Returns the new PID on success, -1 on failure.  Registers the new
 471      process with the process list.  */
 472   virtual int create_inferior (const char *program,
 473                                const std::vector<char *> &program_args) = 0;
 474
 475   /* Do additional setup after a new process is created, including
 476      exec-wrapper completion.  */
 477   virtual void post_create_inferior ();
 478
 479   /* Attach to a running process.
 480
 481      PID is the process ID to attach to, specified by the user
 482      or a higher layer.
 483
 484      Returns -1 if attaching is unsupported, 0 on success, and calls
 485      error() otherwise.  */
 486   virtual int attach (unsigned long pid) = 0;
 487
 488   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 489   virtual int kill (process_info *proc) = 0;
 490 };
 491
 492 extern process_stratum_target *the_target;
 493
 494 void set_target_ops (process_stratum_target *);
 495
 496 #define target_create_inferior(program, program_args)   \
 497   the_target->pt->create_inferior (program, program_args)
 498
 499 #define target_post_create_inferior()                    \
 500   the_target->pt->post_create_inferior ()
 501
 502 #define myattach(pid) \
 503   the_target->pt->attach (pid)
 504
 505 int kill_inferior (process_info *proc);
 506
 507 #define target_supports_fork_events() \
 508   (the_target->supports_fork_events ? \
 509    (*the_target->supports_fork_events) () : 0)
 510
 511 #define target_supports_vfork_events() \
 512   (the_target->supports_vfork_events ? \
 513    (*the_target->supports_vfork_events) () : 0)
 514
 515 #define target_supports_exec_events() \
 516   (the_target->supports_exec_events ? \
 517    (*the_target->supports_exec_events) () : 0)
 518
 519 #define target_handle_new_gdb_connection()               \
 520   do                                                     \
 521     {                                                    \
 522       if (the_target->handle_new_gdb_connection != NULL) \
 523         (*the_target->handle_new_gdb_connection) ();     \
 524     } while (0)
 525
 526 #define detach_inferior(proc) \
 527   (*the_target->detach) (proc)
 528
 529 #define mythread_alive(pid) \
 530   (*the_target->thread_alive) (pid)
 531
 532 #define fetch_inferior_registers(regcache, regno)       \
 533   (*the_target->fetch_registers) (regcache, regno)
 534
 535 #define store_inferior_registers(regcache, regno) \
 536   (*the_target->store_registers) (regcache, regno)
 537
 538 #define join_inferior(pid) \
 539   (*the_target->join) (pid)
 540
 541 #define target_supports_non_stop() \
 542   (the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
 543
 544 #define target_async(enable) \
 545   (the_target->async ? (*the_target->async) (enable) : 0)
 546
 547 #define target_process_qsupported(features, count)      \
 548   do                                                    \
 549     {                                                   \
 550       if (the_target->process_qsupported)               \
 551         the_target->process_qsupported (features, count); \
 552     } while (0)
 553
 554 #define target_supports_catch_syscall()                 \
 555   (the_target->supports_catch_syscall ?                 \
 556    (*the_target->supports_catch_syscall) () : 0)
 557
 558 #define target_get_ipa_tdesc_idx()                      \
 559   (the_target->get_ipa_tdesc_idx                        \
 560    ? (*the_target->get_ipa_tdesc_idx) () : 0)
 561
 562 #define target_supports_tracepoints()                   \
 563   (the_target->supports_tracepoints                     \
 564    ? (*the_target->supports_tracepoints) () : 0)
 565
 566 #define target_supports_fast_tracepoints()              \
 567   (the_target->install_fast_tracepoint_jump_pad != NULL)
 568
 569 #define target_get_min_fast_tracepoint_insn_len()       \
 570   (the_target->get_min_fast_tracepoint_insn_len         \
 571    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 572
 573 #define thread_stopped(thread) \
 574   (*the_target->thread_stopped) (thread)
 575
 576 #define pause_all(freeze)                       \
 577   do                                            \
 578     {                                           \
 579       if (the_target->pause_all)                \
 580         (*the_target->pause_all) (freeze);      \
 581     } while (0)
 582
 583 #define unpause_all(unfreeze)                   \
 584   do                                            \
 585     {                                           \
 586       if (the_target->unpause_all)              \
 587         (*the_target->unpause_all) (unfreeze);  \
 588     } while (0)
 589
 590 #define stabilize_threads()                     \
 591   do                                            \
 592     {                                           \
 593       if (the_target->stabilize_threads)        \
 594         (*the_target->stabilize_threads) ();    \
 595     } while (0)
 596
 597 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 598                                          collector, lockaddr,           \
 599                                          orig_size,                     \
 600                                          jump_entry,                    \
 601                                          trampoline, trampoline_size,   \
 602                                          jjump_pad_insn,                \
 603                                          jjump_pad_insn_size,           \
 604                                          adjusted_insn_addr,            \
 605                                          adjusted_insn_addr_end,        \
 606                                          err)                           \
 607   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 608                                                    collector,lockaddr,  \
 609                                                    orig_size, jump_entry, \
 610                                                    trampoline,          \
 611                                                    trampoline_size,     \
 612                                                    jjump_pad_insn,      \
 613                                                    jjump_pad_insn_size, \
 614                                                    adjusted_insn_addr,  \
 615                                                    adjusted_insn_addr_end, \
 616                                                    err)
 617
 618 #define target_emit_ops() \
 619   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 620
 621 #define target_supports_disable_randomization() \
 622   (the_target->supports_disable_randomization ? \
 623    (*the_target->supports_disable_randomization) () : 0)
 624
 625 #define target_supports_agent() \
 626   (the_target->supports_agent ? \
 627    (*the_target->supports_agent) () : 0)
 628
 629 static inline struct btrace_target_info *
 630 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 631 {
 632   if (the_target->enable_btrace == nullptr)
 633     error (_("Target does not support branch tracing."));
 634
 635   return (*the_target->enable_btrace) (ptid, conf);
 636 }
 637
 638 static inline int
 639 target_disable_btrace (struct btrace_target_info *tinfo)
 640 {
 641   if (the_target->disable_btrace == nullptr)
 642     error (_("Target does not support branch tracing."));
 643
 644   return (*the_target->disable_btrace) (tinfo);
 645 }
 646
 647 static inline int
 648 target_read_btrace (struct btrace_target_info *tinfo,
 649                     struct buffer *buffer,
 650                     enum btrace_read_type type)
 651 {
 652   if (the_target->read_btrace == nullptr)
 653     error (_("Target does not support branch tracing."));
 654
 655   return (*the_target->read_btrace) (tinfo, buffer, type);
 656 }
 657
 658 static inline int
 659 target_read_btrace_conf (struct btrace_target_info *tinfo,
 660                          struct buffer *buffer)
 661 {
 662   if (the_target->read_btrace_conf == nullptr)
 663     error (_("Target does not support branch tracing."));
 664
 665   return (*the_target->read_btrace_conf) (tinfo, buffer);
 666 }
 667
 668 #define target_supports_range_stepping() \
 669   (the_target->supports_range_stepping ? \
 670    (*the_target->supports_range_stepping) () : 0)
 671
 672 #define target_supports_stopped_by_sw_breakpoint() \
 673   (the_target->supports_stopped_by_sw_breakpoint ? \
 674    (*the_target->supports_stopped_by_sw_breakpoint) () : 0)
 675
 676 #define target_stopped_by_sw_breakpoint() \
 677   (the_target->stopped_by_sw_breakpoint ? \
 678    (*the_target->stopped_by_sw_breakpoint) () : 0)
 679
 680 #define target_supports_stopped_by_hw_breakpoint() \
 681   (the_target->supports_stopped_by_hw_breakpoint ? \
 682    (*the_target->supports_stopped_by_hw_breakpoint) () : 0)
 683
 684 #define target_supports_hardware_single_step() \
 685   (the_target->supports_hardware_single_step ? \
 686    (*the_target->supports_hardware_single_step) () : 0)
 687
 688 #define target_stopped_by_hw_breakpoint() \
 689   (the_target->stopped_by_hw_breakpoint ? \
 690    (*the_target->stopped_by_hw_breakpoint) () : 0)
 691
 692 #define target_breakpoint_kind_from_pc(pcptr) \
 693   (the_target->breakpoint_kind_from_pc \
 694    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 695    : default_breakpoint_kind_from_pc (pcptr))
 696
 697 #define target_breakpoint_kind_from_current_state(pcptr) \
 698   (the_target->breakpoint_kind_from_current_state \
 699    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 700    : target_breakpoint_kind_from_pc (pcptr))
 701
 702 #define target_supports_software_single_step() \
 703   (the_target->supports_software_single_step ? \
 704    (*the_target->supports_software_single_step) () : 0)
 705
 706 /* Start non-stop mode, returns 0 on success, -1 on failure.   */
 707
 708 int start_non_stop (int nonstop);
 709
 710 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 711                int connected_wait);
 712
 713 /* Prepare to read or write memory from the inferior process.  See the
 714    corresponding process_stratum_target methods for more details.  */
 715
 716 int prepare_to_access_memory (void);
 717 void done_accessing_memory (void);
 718
 719 #define target_core_of_thread(ptid)             \
 720   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 721    : -1)
 722
 723 #define target_thread_name(ptid)                                \
 724   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 725    : NULL)
 726
 727 #define target_thread_handle(ptid, handle, handle_len) \
 728    (the_target->thread_handle ? (*the_target->thread_handle) \
 729                                   (ptid, handle, handle_len) \
 730    : false)
 731
 732 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 733
 734 int set_desired_thread ();
 735
 736 const char *target_pid_to_str (ptid_t);
 737
 738 int target_can_do_hardware_single_step (void);
 739
 740 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 741
 742 #endif /* GDBSERVER_TARGET_H */