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