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