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