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   /* Insert and remove a break or watchpoint.
  74      Returns 0 on success, -1 on failure and 1 on unsupported.  */
  75
  76   int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
  77                        int size, struct raw_breakpoint *bp);
  78   int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
  79                        int size, struct raw_breakpoint *bp);
  80
  81   /* Returns 1 if the target stopped because it executed a software
  82      breakpoint instruction, 0 otherwise.  */
  83   int (*stopped_by_sw_breakpoint) (void);
  84
  85   /* Returns true if the target knows whether a trap was caused by a
  86      SW breakpoint triggering.  */
  87   int (*supports_stopped_by_sw_breakpoint) (void);
  88
  89   /* Returns 1 if the target stopped for a hardware breakpoint.  */
  90   int (*stopped_by_hw_breakpoint) (void);
  91
  92   /* Returns true if the target knows whether a trap was caused by a
  93      HW breakpoint triggering.  */
  94   int (*supports_stopped_by_hw_breakpoint) (void);
  95
  96   /* Returns true if the target can do hardware single step.  */
  97   int (*supports_hardware_single_step) (void);
  98
  99   /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise.  */
 100
 101   int (*stopped_by_watchpoint) (void);
 102
 103   /* Returns the address associated with the watchpoint that hit, if any;
 104      returns 0 otherwise.  */
 105
 106   CORE_ADDR (*stopped_data_address) (void);
 107
 108   /* Reports the text, data offsets of the executable.  This is
 109      needed for uclinux where the executable is relocated during load
 110      time.  */
 111
 112   int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
 113
 114   /* Fetch the address associated with a specific thread local storage
 115      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 116      Stores it in *ADDRESS and returns zero on success; otherwise returns
 117      an error code.  A return value of -1 means this system does not
 118      support the operation.  */
 119
 120   int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
 121                           CORE_ADDR load_module, CORE_ADDR *address);
 122
 123   /* Fill BUF with an hostio error packet representing the last hostio
 124      error.  */
 125   void (*hostio_last_error) (char *buf);
 126
 127   /* Read/Write OS data using qXfer packets.  */
 128   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
 129                        unsigned const char *writebuf, CORE_ADDR offset,
 130                        int len);
 131
 132   /* Read/Write extra signal info.  */
 133   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
 134                         unsigned const char *writebuf,
 135                         CORE_ADDR offset, int len);
 136
 137   int (*supports_non_stop) (void);
 138
 139   /* Enables async target events.  Returns the previous enable
 140      state.  */
 141   int (*async) (int enable);
 142
 143   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
 144      success, -1 otherwise.  */
 145   int (*start_non_stop) (int);
 146
 147   /* Returns true if the target supports multi-process debugging.  */
 148   int (*supports_multi_process) (void);
 149
 150   /* Returns true if fork events are supported.  */
 151   int (*supports_fork_events) (void);
 152
 153   /* Returns true if vfork events are supported.  */
 154   int (*supports_vfork_events) (void);
 155
 156   /* Returns true if exec events are supported.  */
 157   int (*supports_exec_events) (void);
 158
 159   /* Allows target to re-initialize connection-specific settings.  */
 160   void (*handle_new_gdb_connection) (void);
 161
 162   /* If not NULL, target-specific routine to process monitor command.
 163      Returns 1 if handled, or 0 to perform default processing.  */
 164   int (*handle_monitor_command) (char *);
 165
 166   /* Returns the core given a thread, or -1 if not known.  */
 167   int (*core_of_thread) (ptid_t);
 168
 169   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 170   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 171                        unsigned char *myaddr, unsigned int len);
 172
 173   /* Target specific qSupported support.  FEATURES is an array of
 174      features with COUNT elements.  */
 175   void (*process_qsupported) (char **features, int count);
 176
 177   /* Return 1 if the target supports tracepoints, 0 (or leave the
 178      callback NULL) otherwise.  */
 179   int (*supports_tracepoints) (void);
 180
 181   /* Read PC from REGCACHE.  */
 182   CORE_ADDR (*read_pc) (struct regcache *regcache);
 183
 184   /* Write PC to REGCACHE.  */
 185   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 186
 187   /* Return true if THREAD is known to be stopped now.  */
 188   int (*thread_stopped) (struct thread_info *thread);
 189
 190   /* Read Thread Information Block address.  */
 191   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 192
 193   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 194      be ignored until an unpause_all call unfreezes threads again.
 195      There can be nested calls to pause_all, so a freeze counter
 196      should be maintained.  */
 197   void (*pause_all) (int freeze);
 198
 199   /* Unpause all threads.  Threads that hadn't been resumed by the
 200      client should be left stopped.  Basically a pause/unpause call
 201      pair should not end up resuming threads that were stopped before
 202      the pause call.  */
 203   void (*unpause_all) (int unfreeze);
 204
 205   /* Stabilize all threads.  That is, force them out of jump pads.  */
 206   void (*stabilize_threads) (void);
 207
 208   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 209      tracepoint internal object as used by the IPA agent.  TPADDR is
 210      the address of tracepoint.  COLLECTOR is address of the function
 211      the jump pad redirects to.  LOCKADDR is the address of the jump
 212      pad lock object.  ORIG_SIZE is the size in bytes of the
 213      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 214      jump pad entry, and on return holds the address past the end of
 215      the created jump pad.  If a trampoline is created by the function,
 216      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 217      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 218      buffer containing a copy of the instruction at TPADDR.
 219      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 220      return the address range where the instruction at TPADDR was relocated
 221      to.  If an error occurs, the ERR may be used to pass on an error
 222      message.  */
 223   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 224                                            CORE_ADDR collector,
 225                                            CORE_ADDR lockaddr,
 226                                            ULONGEST orig_size,
 227                                            CORE_ADDR *jump_entry,
 228                                            CORE_ADDR *trampoline,
 229                                            ULONGEST *trampoline_size,
 230                                            unsigned char *jjump_pad_insn,
 231                                            ULONGEST *jjump_pad_insn_size,
 232                                            CORE_ADDR *adjusted_insn_addr,
 233                                            CORE_ADDR *adjusted_insn_addr_end,
 234                                            char *err);
 235
 236   /* Return the bytecode operations vector for the current inferior.
 237      Returns NULL if bytecode compilation is not supported.  */
 238   struct emit_ops *(*emit_ops) (void);
 239
 240   /* Returns true if the target supports disabling randomization.  */
 241   int (*supports_disable_randomization) (void);
 242
 243   /* Return the minimum length of an instruction that can be safely overwritten
 244      for use as a fast tracepoint.  */
 245   int (*get_min_fast_tracepoint_insn_len) (void);
 246
 247   /* Read solib info on SVR4 platforms.  */
 248   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 249                                unsigned const char *writebuf,
 250                                CORE_ADDR offset, int len);
 251
 252   /* Return true if target supports debugging agent.  */
 253   int (*supports_agent) (void);
 254
 255   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 256      target information struct for reading and for disabling branch trace.  */
 257   struct btrace_target_info *(*enable_btrace)
 258     (ptid_t ptid, const struct btrace_config *conf);
 259
 260   /* Disable branch tracing.
 261      Returns zero on success, non-zero otherwise.  */
 262   int (*disable_btrace) (struct btrace_target_info *tinfo);
 263
 264   /* Read branch trace data into buffer.
 265      Return 0 on success; print an error message into BUFFER and return -1,
 266      otherwise.  */
 267   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 268                       enum btrace_read_type type);
 269
 270   /* Read the branch trace configuration into BUFFER.
 271      Return 0 on success; print an error message into BUFFER and return -1
 272      otherwise.  */
 273   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 274
 275   /* Return true if target supports range stepping.  */
 276   int (*supports_range_stepping) (void);
 277
 278   /* Return the full absolute name of the executable file that was
 279      run to create the process PID.  If the executable file cannot
 280      be determined, NULL is returned.  Otherwise, a pointer to a
 281      character string containing the pathname is returned.  This
 282      string should be copied into a buffer by the client if the string
 283      will not be immediately used, or if it must persist.  */
 284   char *(*pid_to_exec_file) (int pid);
 285
 286   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 287      the filesystem as it appears to process PID.  Systems where all
 288      processes share a common filesystem should set this to NULL.
 289      If NULL, the caller should fall back to open(2).  */
 290   int (*multifs_open) (int pid, const char *filename,
 291                        int flags, mode_t mode);
 292
 293   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 294      in the filesystem as it appears to process PID.  Systems where
 295      all processes share a common filesystem should set this to NULL.
 296      If NULL, the caller should fall back to unlink(2).  */
 297   int (*multifs_unlink) (int pid, const char *filename);
 298
 299   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 300      operating in the filesystem as it appears to process PID.
 301      Systems where all processes share a common filesystem should
 302      set this to NULL.  If NULL, the caller should fall back to
 303      readlink(2).  */
 304   ssize_t (*multifs_readlink) (int pid, const char *filename,
 305                                char *buf, size_t bufsiz);
 306
 307   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 308      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 309      ARM) was present in the PC.  */
 310   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 311
 312   /* Return the software breakpoint from KIND.  KIND can have target
 313      specific meaning like the Z0 kind parameter.
 314      SIZE is set to the software breakpoint's length in memory.  */
 315   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 316
 317   /* Return the thread's name, or NULL if the target is unable to determine it.
 318      The returned value must not be freed by the caller.  */
 319   const char *(*thread_name) (ptid_t thread);
 320
 321   /* Return the breakpoint kind for this target based on the current
 322      processor state (e.g. the current instruction mode on ARM) and the
 323      PC.  The PCPTR is adjusted to the real memory location in case a flag
 324      (e.g., the Thumb bit on ARM) is present in the PC.  */
 325   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 326
 327   /* Returns true if the target can software single step.  */
 328   int (*supports_software_single_step) (void);
 329
 330   /* Return 1 if the target supports catch syscall, 0 (or leave the
 331      callback NULL) otherwise.  */
 332   int (*supports_catch_syscall) (void);
 333
 334   /* Return tdesc index for IPA.  */
 335   int (*get_ipa_tdesc_idx) (void);
 336
 337   /* Thread ID to (numeric) thread handle: Return true on success and
 338      false for failure.  Return pointer to thread handle via HANDLE
 339      and the handle's length via HANDLE_LEN.  */
 340   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 341
 342   /* The object that will gradually replace this struct.  */
 343   process_target *pt;
 344 };
 345
 346 class process_target
 347 {
 348 public:
 349
 350   virtual ~process_target () = default;
 351
 352   /* Start a new process.
 353
 354      PROGRAM is a path to the program to execute.
 355      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 356      to be passed to the inferior as ``argv'' (along with PROGRAM).
 357
 358      Returns the new PID on success, -1 on failure.  Registers the new
 359      process with the process list.  */
 360   virtual int create_inferior (const char *program,
 361                                const std::vector<char *> &program_args) = 0;
 362
 363   /* Do additional setup after a new process is created, including
 364      exec-wrapper completion.  */
 365   virtual void post_create_inferior ();
 366
 367   /* Attach to a running process.
 368
 369      PID is the process ID to attach to, specified by the user
 370      or a higher layer.
 371
 372      Returns -1 if attaching is unsupported, 0 on success, and calls
 373      error() otherwise.  */
 374   virtual int attach (unsigned long pid) = 0;
 375
 376   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
 377   virtual int kill (process_info *proc) = 0;
 378
 379   /* Detach from process PROC.  Return -1 on failure, and 0 on
 380      success.  */
 381   virtual int detach (process_info *proc) = 0;
 382
 383   /* The inferior process has died.  Do what is right.  */
 384   virtual void mourn (process_info *proc) = 0;
 385
 386   /* Wait for process PID to exit.  */
 387   virtual void join (int pid) = 0;
 388
 389   /* Return true iff the thread with process ID PID is alive.  */
 390   virtual bool thread_alive (ptid_t pid) = 0;
 391
 392   /* Resume the inferior process.  */
 393   virtual void resume (thread_resume *resume_info, size_t n) = 0;
 394
 395   /* Wait for the inferior process or thread to change state.  Store
 396      status through argument pointer STATUS.
 397
 398      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 399      wait for any thread of process pid to do something.  Return ptid
 400      of child, or -1 in case of error; store status through argument
 401      pointer STATUS.  OPTIONS is a bit set of options defined as
 402      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 403      no child stop to report, return is
 404      null_ptid/TARGET_WAITKIND_IGNORE.  */
 405   virtual ptid_t wait (ptid_t ptid, target_waitstatus *status,
 406                        int options) = 0;
 407
 408   /* Fetch registers from the inferior process.
 409
 410      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 411   virtual void fetch_registers (regcache *regcache, int regno) = 0;
 412
 413   /* Store registers to the inferior process.
 414
 415      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 416   virtual void store_registers (regcache *regcache, int regno) = 0;
 417
 418   /* Prepare to read or write memory from the inferior process.
 419      Targets use this to do what is necessary to get the state of the
 420      inferior such that it is possible to access memory.
 421
 422      This should generally only be called from client facing routines,
 423      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 424      insertion routine.
 425
 426      Like `read_memory' and `write_memory' below, returns 0 on success
 427      and errno on failure.  */
 428   virtual int prepare_to_access_memory ();
 429
 430   /* Undo the effects of prepare_to_access_memory.  */
 431   virtual void done_accessing_memory ();
 432
 433   /* Read memory from the inferior process.  This should generally be
 434      called through read_inferior_memory, which handles breakpoint shadowing.
 435
 436      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 437
 438      Returns 0 on success and errno on failure.  */
 439   virtual int read_memory (CORE_ADDR memaddr, unsigned char *myaddr,
 440                            int len) = 0;
 441
 442   /* Write memory to the inferior process.  This should generally be
 443      called through target_write_memory, which handles breakpoint shadowing.
 444
 445      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 446
 447      Returns 0 on success and errno on failure.  */
 448   virtual int write_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 449                             int len) = 0;
 450
 451   /* Query GDB for the values of any symbols we're interested in.
 452      This function is called whenever we receive a "qSymbols::"
 453      query, which corresponds to every time more symbols (might)
 454      become available.  */
 455   virtual void look_up_symbols ();
 456
 457   /* Send an interrupt request to the inferior process,
 458      however is appropriate.  */
 459   virtual void request_interrupt () = 0;
 460
 461   /* Return true if the read_auxv target op is supported.  */
 462   virtual bool supports_read_auxv ();
 463
 464   /* Read auxiliary vector data from the inferior process.
 465
 466      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 467   virtual int read_auxv (CORE_ADDR offset, unsigned char *myaddr,
 468                          unsigned int len);
 469
 470   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 471      otherwise.  The type is coded as follows:
 472        '0' - software-breakpoint
 473        '1' - hardware-breakpoint
 474        '2' - write watchpoint
 475        '3' - read watchpoint
 476        '4' - access watchpoint
 477   */
 478   virtual bool supports_z_point_type (char z_type);
 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 */