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