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   /* Do additional setup after a new process is created, including
  74      exec-wrapper completion.  */
  75   void (*post_create_inferior) (void);
  76
  77   /* Attach to a running process.
  78
  79      PID is the process ID to attach to, specified by the user
  80      or a higher layer.
  81
  82      Returns -1 if attaching is unsupported, 0 on success, and calls
  83      error() otherwise.  */
  84
  85   int (*attach) (unsigned long pid);
  86
  87   /* Kill process PROC.  Return -1 on failure, and 0 on success.  */
  88
  89   int (*kill) (process_info *proc);
  90
  91   /* Detach from process PROC.  Return -1 on failure, and 0 on
  92      success.  */
  93
  94   int (*detach) (process_info *proc);
  95
  96   /* The inferior process has died.  Do what is right.  */
  97
  98   void (*mourn) (struct process_info *proc);
  99
 100   /* Wait for process PID to exit.  */
 101
 102   void (*join) (int pid);
 103
 104   /* Return 1 iff the thread with process ID PID is alive.  */
 105
 106   int (*thread_alive) (ptid_t pid);
 107
 108   /* Resume the inferior process.  */
 109
 110   void (*resume) (struct thread_resume *resume_info, size_t n);
 111
 112   /* Wait for the inferior process or thread to change state.  Store
 113      status through argument pointer STATUS.
 114
 115      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 116      wait for any thread of process pid to do something.  Return ptid
 117      of child, or -1 in case of error; store status through argument
 118      pointer STATUS.  OPTIONS is a bit set of options defined as
 119      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 120      no child stop to report, return is
 121      null_ptid/TARGET_WAITKIND_IGNORE.  */
 122
 123   ptid_t (*wait) (ptid_t ptid, struct target_waitstatus *status, int options);
 124
 125   /* Fetch registers from the inferior process.
 126
 127      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 128
 129   void (*fetch_registers) (struct regcache *regcache, int regno);
 130
 131   /* Store registers to the inferior process.
 132
 133      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 134
 135   void (*store_registers) (struct regcache *regcache, int regno);
 136
 137   /* Prepare to read or write memory from the inferior process.
 138      Targets use this to do what is necessary to get the state of the
 139      inferior such that it is possible to access memory.
 140
 141      This should generally only be called from client facing routines,
 142      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 143      insertion routine.
 144
 145      Like `read_memory' and `write_memory' below, returns 0 on success
 146      and errno on failure.  */
 147
 148   int (*prepare_to_access_memory) (void);
 149
 150   /* Undo the effects of prepare_to_access_memory.  */
 151
 152   void (*done_accessing_memory) (void);
 153
 154   /* Read memory from the inferior process.  This should generally be
 155      called through read_inferior_memory, which handles breakpoint shadowing.
 156
 157      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 158
 159      Returns 0 on success and errno on failure.  */
 160
 161   int (*read_memory) (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 162
 163   /* Write memory to the inferior process.  This should generally be
 164      called through target_write_memory, which handles breakpoint shadowing.
 165
 166      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 167
 168      Returns 0 on success and errno on failure.  */
 169
 170   int (*write_memory) (CORE_ADDR memaddr, const unsigned char *myaddr,
 171                        int len);
 172
 173   /* Query GDB for the values of any symbols we're interested in.
 174      This function is called whenever we receive a "qSymbols::"
 175      query, which corresponds to every time more symbols (might)
 176      become available.  NULL if we aren't interested in any
 177      symbols.  */
 178
 179   void (*look_up_symbols) (void);
 180
 181   /* Send an interrupt request to the inferior process,
 182      however is appropriate.  */
 183
 184   void (*request_interrupt) (void);
 185
 186   /* Read auxiliary vector data from the inferior process.
 187
 188      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 189
 190   int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
 191                     unsigned int len);
 192
 193   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 194      otherwise.  The type is coded as follows:
 195        '0' - software-breakpoint
 196        '1' - hardware-breakpoint
 197        '2' - write watchpoint
 198        '3' - read watchpoint
 199        '4' - access watchpoint
 200   */
 201   int (*supports_z_point_type) (char z_type);
 202
 203   /* Insert and remove a break or watchpoint.
 204      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 205
 206   int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 207                        int size, struct raw_breakpoint *bp);
 208   int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 209                        int size, struct raw_breakpoint *bp);
 210
 211   /* Returns 1 if the target stopped because it executed a software
 212      breakpoint instruction, 0 otherwise.  */
 213   int (*stopped_by_sw_breakpoint) (void);
 214
 215   /* Returns true if the target knows whether a trap was caused by a
 216      SW breakpoint triggering.  */
 217   int (*supports_stopped_by_sw_breakpoint) (void);
 218
 219   /* Returns 1 if the target stopped for a hardware breakpoint.  */
 220   int (*stopped_by_hw_breakpoint) (void);
 221
 222   /* Returns true if the target knows whether a trap was caused by a
 223      HW breakpoint triggering.  */
 224   int (*supports_stopped_by_hw_breakpoint) (void);
 225
 226   /* Returns true if the target can do hardware single step.  */
 227   int (*supports_hardware_single_step) (void);
 228
 229   /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise.  */
 230
 231   int (*stopped_by_watchpoint) (void);
 232
 233   /* Returns the address associated with the watchpoint that hit, if any;
 234      returns 0 otherwise.  */
 235
 236   CORE_ADDR (*stopped_data_address) (void);
 237
 238   /* Reports the text, data offsets of the executable.  This is
 239      needed for uclinux where the executable is relocated during load
 240      time.  */
 241
 242   int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
 243
 244   /* Fetch the address associated with a specific thread local storage
 245      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 246      Stores it in *ADDRESS and returns zero on success; otherwise returns
 247      an error code.  A return value of -1 means this system does not
 248      support the operation.  */
 249
 250   int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
 251                           CORE_ADDR load_module, CORE_ADDR *address);
 252
 253   /* Fill BUF with an hostio error packet representing the last hostio
 254      error.  */
 255   void (*hostio_last_error) (char *buf);
 256
 257   /* Read/Write OS data using qXfer packets.  */
 258   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
 259                        unsigned const char *writebuf, CORE_ADDR offset,
 260                        int len);
 261
 262   /* Read/Write extra signal info.  */
 263   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
 264                         unsigned const char *writebuf,
 265                         CORE_ADDR offset, int len);
 266
 267   int (*supports_non_stop) (void);
 268
 269   /* Enables async target events.  Returns the previous enable
 270      state.  */
 271   int (*async) (int enable);
 272
 273   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
 274      success, -1 otherwise.  */
 275   int (*start_non_stop) (int);
 276
 277   /* Returns true if the target supports multi-process debugging.  */
 278   int (*supports_multi_process) (void);
 279
 280   /* Returns true if fork events are supported.  */
 281   int (*supports_fork_events) (void);
 282
 283   /* Returns true if vfork events are supported.  */
 284   int (*supports_vfork_events) (void);
 285
 286   /* Returns true if exec events are supported.  */
 287   int (*supports_exec_events) (void);
 288
 289   /* Allows target to re-initialize connection-specific settings.  */
 290   void (*handle_new_gdb_connection) (void);
 291
 292   /* If not NULL, target-specific routine to process monitor command.
 293      Returns 1 if handled, or 0 to perform default processing.  */
 294   int (*handle_monitor_command) (char *);
 295
 296   /* Returns the core given a thread, or -1 if not known.  */
 297   int (*core_of_thread) (ptid_t);
 298
 299   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 300   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 301                        unsigned char *myaddr, unsigned int len);
 302
 303   /* Target specific qSupported support.  FEATURES is an array of
 304      features with COUNT elements.  */
 305   void (*process_qsupported) (char **features, int count);
 306
 307   /* Return 1 if the target supports tracepoints, 0 (or leave the
 308      callback NULL) otherwise.  */
 309   int (*supports_tracepoints) (void);
 310
 311   /* Read PC from REGCACHE.  */
 312   CORE_ADDR (*read_pc) (struct regcache *regcache);
 313
 314   /* Write PC to REGCACHE.  */
 315   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 316
 317   /* Return true if THREAD is known to be stopped now.  */
 318   int (*thread_stopped) (struct thread_info *thread);
 319
 320   /* Read Thread Information Block address.  */
 321   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 322
 323   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 324      be ignored until an unpause_all call unfreezes threads again.
 325      There can be nested calls to pause_all, so a freeze counter
 326      should be maintained.  */
 327   void (*pause_all) (int freeze);
 328
 329   /* Unpause all threads.  Threads that hadn't been resumed by the
 330      client should be left stopped.  Basically a pause/unpause call
 331      pair should not end up resuming threads that were stopped before
 332      the pause call.  */
 333   void (*unpause_all) (int unfreeze);
 334
 335   /* Stabilize all threads.  That is, force them out of jump pads.  */
 336   void (*stabilize_threads) (void);
 337
 338   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 339      tracepoint internal object as used by the IPA agent.  TPADDR is
 340      the address of tracepoint.  COLLECTOR is address of the function
 341      the jump pad redirects to.  LOCKADDR is the address of the jump
 342      pad lock object.  ORIG_SIZE is the size in bytes of the
 343      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 344      jump pad entry, and on return holds the address past the end of
 345      the created jump pad.  If a trampoline is created by the function,
 346      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 347      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 348      buffer containing a copy of the instruction at TPADDR.
 349      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 350      return the address range where the instruction at TPADDR was relocated
 351      to.  If an error occurs, the ERR may be used to pass on an error
 352      message.  */
 353   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 354                                            CORE_ADDR collector,
 355                                            CORE_ADDR lockaddr,
 356                                            ULONGEST orig_size,
 357                                            CORE_ADDR *jump_entry,
 358                                            CORE_ADDR *trampoline,
 359                                            ULONGEST *trampoline_size,
 360                                            unsigned char *jjump_pad_insn,
 361                                            ULONGEST *jjump_pad_insn_size,
 362                                            CORE_ADDR *adjusted_insn_addr,
 363                                            CORE_ADDR *adjusted_insn_addr_end,
 364                                            char *err);
 365
 366   /* Return the bytecode operations vector for the current inferior.
 367      Returns NULL if bytecode compilation is not supported.  */
 368   struct emit_ops *(*emit_ops) (void);
 369
 370   /* Returns true if the target supports disabling randomization.  */
 371   int (*supports_disable_randomization) (void);
 372
 373   /* Return the minimum length of an instruction that can be safely overwritten
 374      for use as a fast tracepoint.  */
 375   int (*get_min_fast_tracepoint_insn_len) (void);
 376
 377   /* Read solib info on SVR4 platforms.  */
 378   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 379                                unsigned const char *writebuf,
 380                                CORE_ADDR offset, int len);
 381
 382   /* Return true if target supports debugging agent.  */
 383   int (*supports_agent) (void);
 384
 385   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 386      target information struct for reading and for disabling branch trace.  */
 387   struct btrace_target_info *(*enable_btrace)
 388     (ptid_t ptid, const struct btrace_config *conf);
 389
 390   /* Disable branch tracing.
 391      Returns zero on success, non-zero otherwise.  */
 392   int (*disable_btrace) (struct btrace_target_info *tinfo);
 393
 394   /* Read branch trace data into buffer.
 395      Return 0 on success; print an error message into BUFFER and return -1,
 396      otherwise.  */
 397   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 398                       enum btrace_read_type type);
 399
 400   /* Read the branch trace configuration into BUFFER.
 401      Return 0 on success; print an error message into BUFFER and return -1
 402      otherwise.  */
 403   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 404
 405   /* Return true if target supports range stepping.  */
 406   int (*supports_range_stepping) (void);
 407
 408   /* Return the full absolute name of the executable file that was
 409      run to create the process PID.  If the executable file cannot
 410      be determined, NULL is returned.  Otherwise, a pointer to a
 411      character string containing the pathname is returned.  This
 412      string should be copied into a buffer by the client if the string
 413      will not be immediately used, or if it must persist.  */
 414   char *(*pid_to_exec_file) (int pid);
 415
 416   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 417      the filesystem as it appears to process PID.  Systems where all
 418      processes share a common filesystem should set this to NULL.
 419      If NULL, the caller should fall back to open(2).  */
 420   int (*multifs_open) (int pid, const char *filename,
 421                        int flags, mode_t mode);
 422
 423   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 424      in the filesystem as it appears to process PID.  Systems where
 425      all processes share a common filesystem should set this to NULL.
 426      If NULL, the caller should fall back to unlink(2).  */
 427   int (*multifs_unlink) (int pid, const char *filename);
 428
 429   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 430      operating in the filesystem as it appears to process PID.
 431      Systems where all processes share a common filesystem should
 432      set this to NULL.  If NULL, the caller should fall back to
 433      readlink(2).  */
 434   ssize_t (*multifs_readlink) (int pid, const char *filename,
 435                                char *buf, size_t bufsiz);
 436
 437   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 438      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 439      ARM) was present in the PC.  */
 440   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 441
 442   /* Return the software breakpoint from KIND.  KIND can have target
 443      specific meaning like the Z0 kind parameter.
 444      SIZE is set to the software breakpoint's length in memory.  */
 445   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 446
 447   /* Return the thread's name, or NULL if the target is unable to determine it.
 448      The returned value must not be freed by the caller.  */
 449   const char *(*thread_name) (ptid_t thread);
 450
 451   /* Return the breakpoint kind for this target based on the current
 452      processor state (e.g. the current instruction mode on ARM) and the
 453      PC.  The PCPTR is adjusted to the real memory location in case a flag
 454      (e.g., the Thumb bit on ARM) is present in the PC.  */
 455   int (*breakpoint_kind_from_current_state) (CORE_ADDR *pcptr);
 456
 457   /* Returns true if the target can software single step.  */
 458   int (*supports_software_single_step) (void);
 459
 460   /* Return 1 if the target supports catch syscall, 0 (or leave the
 461      callback NULL) otherwise.  */
 462   int (*supports_catch_syscall) (void);
 463
 464   /* Return tdesc index for IPA.  */
 465   int (*get_ipa_tdesc_idx) (void);
 466
 467   /* Thread ID to (numeric) thread handle: Return true on success and
 468      false for failure.  Return pointer to thread handle via HANDLE
 469      and the handle's length via HANDLE_LEN.  */
 470   bool (*thread_handle) (ptid_t ptid, gdb_byte **handle, int *handle_len);
 471
 472   /* The object that will gradually replace this struct.  */
 473   process_target *pt;
 474 };
 475
 476 class process_target
 477 {
 478 public:
 479
 480   virtual ~process_target () = default;
 481
 482   /* Start a new process.
 483
 484      PROGRAM is a path to the program to execute.
 485      PROGRAM_ARGS is a standard NULL-terminated array of arguments,
 486      to be passed to the inferior as ``argv'' (along with PROGRAM).
 487
 488      Returns the new PID on success, -1 on failure.  Registers the new
 489      process with the process list.  */
 490   virtual int create_inferior (const char *program,
 491                                const std::vector<char *> &program_args) = 0;
 492 };
 493
 494 extern process_stratum_target *the_target;
 495
 496 void set_target_ops (process_stratum_target *);
 497
 498 #define target_create_inferior(program, program_args)   \
 499   the_target->pt->create_inferior (program, program_args)
 500
 501 #define target_post_create_inferior()                    \
 502   do                                                     \
 503     {                                                    \
 504       if (the_target->post_create_inferior != NULL)      \
 505         (*the_target->post_create_inferior) ();          \
 506     } while (0)
 507
 508 #define myattach(pid) \
 509   (*the_target->attach) (pid)
 510
 511 int kill_inferior (process_info *proc);
 512
 513 #define target_supports_fork_events() \
 514   (the_target->supports_fork_events ? \
 515    (*the_target->supports_fork_events) () : 0)
 516
 517 #define target_supports_vfork_events() \
 518   (the_target->supports_vfork_events ? \
 519    (*the_target->supports_vfork_events) () : 0)
 520
 521 #define target_supports_exec_events() \
 522   (the_target->supports_exec_events ? \
 523    (*the_target->supports_exec_events) () : 0)
 524
 525 #define target_handle_new_gdb_connection()               \
 526   do                                                     \
 527     {                                                    \
 528       if (the_target->handle_new_gdb_connection != NULL) \
 529         (*the_target->handle_new_gdb_connection) ();     \
 530     } while (0)
 531
 532 #define detach_inferior(proc) \
 533   (*the_target->detach) (proc)
 534
 535 #define mythread_alive(pid) \
 536   (*the_target->thread_alive) (pid)
 537
 538 #define fetch_inferior_registers(regcache, regno)       \
 539   (*the_target->fetch_registers) (regcache, regno)
 540
 541 #define store_inferior_registers(regcache, regno) \
 542   (*the_target->store_registers) (regcache, regno)
 543
 544 #define join_inferior(pid) \
 545   (*the_target->join) (pid)
 546
 547 #define target_supports_non_stop() \
 548   (the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
 549
 550 #define target_async(enable) \
 551   (the_target->async ? (*the_target->async) (enable) : 0)
 552
 553 #define target_process_qsupported(features, count)      \
 554   do                                                    \
 555     {                                                   \
 556       if (the_target->process_qsupported)               \
 557         the_target->process_qsupported (features, count); \
 558     } while (0)
 559
 560 #define target_supports_catch_syscall()                 \
 561   (the_target->supports_catch_syscall ?                 \
 562    (*the_target->supports_catch_syscall) () : 0)
 563
 564 #define target_get_ipa_tdesc_idx()                      \
 565   (the_target->get_ipa_tdesc_idx                        \
 566    ? (*the_target->get_ipa_tdesc_idx) () : 0)
 567
 568 #define target_supports_tracepoints()                   \
 569   (the_target->supports_tracepoints                     \
 570    ? (*the_target->supports_tracepoints) () : 0)
 571
 572 #define target_supports_fast_tracepoints()              \
 573   (the_target->install_fast_tracepoint_jump_pad != NULL)
 574
 575 #define target_get_min_fast_tracepoint_insn_len()       \
 576   (the_target->get_min_fast_tracepoint_insn_len         \
 577    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 578
 579 #define thread_stopped(thread) \
 580   (*the_target->thread_stopped) (thread)
 581
 582 #define pause_all(freeze)                       \
 583   do                                            \
 584     {                                           \
 585       if (the_target->pause_all)                \
 586         (*the_target->pause_all) (freeze);      \
 587     } while (0)
 588
 589 #define unpause_all(unfreeze)                   \
 590   do                                            \
 591     {                                           \
 592       if (the_target->unpause_all)              \
 593         (*the_target->unpause_all) (unfreeze);  \
 594     } while (0)
 595
 596 #define stabilize_threads()                     \
 597   do                                            \
 598     {                                           \
 599       if (the_target->stabilize_threads)        \
 600         (*the_target->stabilize_threads) ();    \
 601     } while (0)
 602
 603 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 604                                          collector, lockaddr,           \
 605                                          orig_size,                     \
 606                                          jump_entry,                    \
 607                                          trampoline, trampoline_size,   \
 608                                          jjump_pad_insn,                \
 609                                          jjump_pad_insn_size,           \
 610                                          adjusted_insn_addr,            \
 611                                          adjusted_insn_addr_end,        \
 612                                          err)                           \
 613   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 614                                                    collector,lockaddr,  \
 615                                                    orig_size, jump_entry, \
 616                                                    trampoline,          \
 617                                                    trampoline_size,     \
 618                                                    jjump_pad_insn,      \
 619                                                    jjump_pad_insn_size, \
 620                                                    adjusted_insn_addr,  \
 621                                                    adjusted_insn_addr_end, \
 622                                                    err)
 623
 624 #define target_emit_ops() \
 625   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 626
 627 #define target_supports_disable_randomization() \
 628   (the_target->supports_disable_randomization ? \
 629    (*the_target->supports_disable_randomization) () : 0)
 630
 631 #define target_supports_agent() \
 632   (the_target->supports_agent ? \
 633    (*the_target->supports_agent) () : 0)
 634
 635 static inline struct btrace_target_info *
 636 target_enable_btrace (ptid_t ptid, const struct btrace_config *conf)
 637 {
 638   if (the_target->enable_btrace == nullptr)
 639     error (_("Target does not support branch tracing."));
 640
 641   return (*the_target->enable_btrace) (ptid, conf);
 642 }
 643
 644 static inline int
 645 target_disable_btrace (struct btrace_target_info *tinfo)
 646 {
 647   if (the_target->disable_btrace == nullptr)
 648     error (_("Target does not support branch tracing."));
 649
 650   return (*the_target->disable_btrace) (tinfo);
 651 }
 652
 653 static inline int
 654 target_read_btrace (struct btrace_target_info *tinfo,
 655                     struct buffer *buffer,
 656                     enum btrace_read_type type)
 657 {
 658   if (the_target->read_btrace == nullptr)
 659     error (_("Target does not support branch tracing."));
 660
 661   return (*the_target->read_btrace) (tinfo, buffer, type);
 662 }
 663
 664 static inline int
 665 target_read_btrace_conf (struct btrace_target_info *tinfo,
 666                          struct buffer *buffer)
 667 {
 668   if (the_target->read_btrace_conf == nullptr)
 669     error (_("Target does not support branch tracing."));
 670
 671   return (*the_target->read_btrace_conf) (tinfo, buffer);
 672 }
 673
 674 #define target_supports_range_stepping() \
 675   (the_target->supports_range_stepping ? \
 676    (*the_target->supports_range_stepping) () : 0)
 677
 678 #define target_supports_stopped_by_sw_breakpoint() \
 679   (the_target->supports_stopped_by_sw_breakpoint ? \
 680    (*the_target->supports_stopped_by_sw_breakpoint) () : 0)
 681
 682 #define target_stopped_by_sw_breakpoint() \
 683   (the_target->stopped_by_sw_breakpoint ? \
 684    (*the_target->stopped_by_sw_breakpoint) () : 0)
 685
 686 #define target_supports_stopped_by_hw_breakpoint() \
 687   (the_target->supports_stopped_by_hw_breakpoint ? \
 688    (*the_target->supports_stopped_by_hw_breakpoint) () : 0)
 689
 690 #define target_supports_hardware_single_step() \
 691   (the_target->supports_hardware_single_step ? \
 692    (*the_target->supports_hardware_single_step) () : 0)
 693
 694 #define target_stopped_by_hw_breakpoint() \
 695   (the_target->stopped_by_hw_breakpoint ? \
 696    (*the_target->stopped_by_hw_breakpoint) () : 0)
 697
 698 #define target_breakpoint_kind_from_pc(pcptr) \
 699   (the_target->breakpoint_kind_from_pc \
 700    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 701    : default_breakpoint_kind_from_pc (pcptr))
 702
 703 #define target_breakpoint_kind_from_current_state(pcptr) \
 704   (the_target->breakpoint_kind_from_current_state \
 705    ? (*the_target->breakpoint_kind_from_current_state) (pcptr) \
 706    : target_breakpoint_kind_from_pc (pcptr))
 707
 708 #define target_supports_software_single_step() \
 709   (the_target->supports_software_single_step ? \
 710    (*the_target->supports_software_single_step) () : 0)
 711
 712 /* Start non-stop mode, returns 0 on success, -1 on failure.   */
 713
 714 int start_non_stop (int nonstop);
 715
 716 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 717                int connected_wait);
 718
 719 /* Prepare to read or write memory from the inferior process.  See the
 720    corresponding process_stratum_target methods for more details.  */
 721
 722 int prepare_to_access_memory (void);
 723 void done_accessing_memory (void);
 724
 725 #define target_core_of_thread(ptid)             \
 726   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 727    : -1)
 728
 729 #define target_thread_name(ptid)                                \
 730   (the_target->thread_name ? (*the_target->thread_name) (ptid)  \
 731    : NULL)
 732
 733 #define target_thread_handle(ptid, handle, handle_len) \
 734    (the_target->thread_handle ? (*the_target->thread_handle) \
 735                                   (ptid, handle, handle_len) \
 736    : false)
 737
 738 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 739
 740 int set_desired_thread ();
 741
 742 const char *target_pid_to_str (ptid_t);
 743
 744 int target_can_do_hardware_single_step (void);
 745
 746 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 747
 748 #endif /* GDBSERVER_TARGET_H */