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