gdbserver/target.h

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