gdbserver/target.h

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