gdb/gdbserver/target.h

   1 /* Target operations for the remote server for GDB.
   2    Copyright (C) 2002-2015 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 TARGET_H
  22 #define 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 "btrace-common.h"
  31
  32 struct emit_ops;
  33 struct buffer;
  34 struct process_info;
  35
  36 /* This structure describes how to resume a particular thread (or all
  37    threads) based on the client's request.  If thread is -1, then this
  38    entry applies to all threads.  These are passed around as an
  39    array.  */
  40
  41 struct thread_resume
  42 {
  43   ptid_t thread;
  44
  45   /* How to "resume".  */
  46   enum resume_kind kind;
  47
  48   /* If non-zero, send this signal when we resume, or to stop the
  49      thread.  If stopping a thread, and this is 0, the target should
  50      stop the thread however it best decides to (e.g., SIGSTOP on
  51      linux; SuspendThread on win32).  This is a host signal value (not
  52      enum gdb_signal).  */
  53   int sig;
  54
  55   /* Range to single step within.  Valid only iff KIND is resume_step.
  56
  57      Single-step once, and then continuing stepping as long as the
  58      thread stops in this range.  (If the range is empty
  59      [STEP_RANGE_START == STEP_RANGE_END], then this is a single-step
  60      request.)  */
  61   CORE_ADDR step_range_start;   /* Inclusive */
  62   CORE_ADDR step_range_end;     /* Exclusive */
  63 };
  64
  65 struct target_ops
  66 {
  67   /* Start a new process.
  68
  69      PROGRAM is a path to the program to execute.
  70      ARGS is a standard NULL-terminated array of arguments,
  71      to be passed to the inferior as ``argv''.
  72
  73      Returns the new PID on success, -1 on failure.  Registers the new
  74      process with the process list.  */
  75
  76   int (*create_inferior) (char *program, char **args);
  77
  78   /* Architecture-specific setup.  */
  79   void (*arch_setup) (void);
  80
  81   /* Attach to a running process.
  82
  83      PID is the process ID to attach to, specified by the user
  84      or a higher layer.
  85
  86      Returns -1 if attaching is unsupported, 0 on success, and calls
  87      error() otherwise.  */
  88
  89   int (*attach) (unsigned long pid);
  90
  91   /* Kill inferior PID.  Return -1 on failure, and 0 on success.  */
  92
  93   int (*kill) (int pid);
  94
  95   /* Detach from inferior PID. Return -1 on failure, and 0 on
  96      success.  */
  97
  98   int (*detach) (int pid);
  99
 100   /* The inferior process has died.  Do what is right.  */
 101
 102   void (*mourn) (struct process_info *proc);
 103
 104   /* Wait for inferior PID to exit.  */
 105   void (*join) (int pid);
 106
 107   /* Return 1 iff the thread with process ID PID is alive.  */
 108
 109   int (*thread_alive) (ptid_t pid);
 110
 111   /* Resume the inferior process.  */
 112
 113   void (*resume) (struct thread_resume *resume_info, size_t n);
 114
 115   /* Wait for the inferior process or thread to change state.  Store
 116      status through argument pointer STATUS.
 117
 118      PTID = -1 to wait for any pid to do something, PTID(pid,0,0) to
 119      wait for any thread of process pid to do something.  Return ptid
 120      of child, or -1 in case of error; store status through argument
 121      pointer STATUS.  OPTIONS is a bit set of options defined as
 122      TARGET_W* above.  If options contains TARGET_WNOHANG and there's
 123      no child stop to report, return is
 124      null_ptid/TARGET_WAITKIND_IGNORE.  */
 125
 126   ptid_t (*wait) (ptid_t ptid, struct target_waitstatus *status, int options);
 127
 128   /* Fetch registers from the inferior process.
 129
 130      If REGNO is -1, fetch all registers; otherwise, fetch at least REGNO.  */
 131
 132   void (*fetch_registers) (struct regcache *regcache, int regno);
 133
 134   /* Store registers to the inferior process.
 135
 136      If REGNO is -1, store all registers; otherwise, store at least REGNO.  */
 137
 138   void (*store_registers) (struct regcache *regcache, int regno);
 139
 140   /* Prepare to read or write memory from the inferior process.
 141      Targets use this to do what is necessary to get the state of the
 142      inferior such that it is possible to access memory.
 143
 144      This should generally only be called from client facing routines,
 145      such as gdb_read_memory/gdb_write_memory, or the GDB breakpoint
 146      insertion routine.
 147
 148      Like `read_memory' and `write_memory' below, returns 0 on success
 149      and errno on failure.  */
 150
 151   int (*prepare_to_access_memory) (void);
 152
 153   /* Undo the effects of prepare_to_access_memory.  */
 154
 155   void (*done_accessing_memory) (void);
 156
 157   /* Read memory from the inferior process.  This should generally be
 158      called through read_inferior_memory, which handles breakpoint shadowing.
 159
 160      Read LEN bytes at MEMADDR into a buffer at MYADDR.
 161
 162      Returns 0 on success and errno on failure.  */
 163
 164   int (*read_memory) (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 165
 166   /* Write memory to the inferior process.  This should generally be
 167      called through write_inferior_memory, which handles breakpoint shadowing.
 168
 169      Write LEN bytes from the buffer at MYADDR to MEMADDR.
 170
 171      Returns 0 on success and errno on failure.  */
 172
 173   int (*write_memory) (CORE_ADDR memaddr, const unsigned char *myaddr,
 174                        int len);
 175
 176   /* Query GDB for the values of any symbols we're interested in.
 177      This function is called whenever we receive a "qSymbols::"
 178      query, which corresponds to every time more symbols (might)
 179      become available.  NULL if we aren't interested in any
 180      symbols.  */
 181
 182   void (*look_up_symbols) (void);
 183
 184   /* Send an interrupt request to the inferior process,
 185      however is appropriate.  */
 186
 187   void (*request_interrupt) (void);
 188
 189   /* Read auxiliary vector data from the inferior process.
 190
 191      Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 192
 193   int (*read_auxv) (CORE_ADDR offset, unsigned char *myaddr,
 194                     unsigned int len);
 195
 196   /* Returns true if GDB Z breakpoint type TYPE is supported, false
 197      otherwise.  The type is coded as follows:
 198        '0' - software-breakpoint
 199        '1' - hardware-breakpoint
 200        '2' - write watchpoint
 201        '3' - read watchpoint
 202        '4' - access watchpoint
 203   */
 204   int (*supports_z_point_type) (char z_type);
 205
 206   /* Insert and remove a break or watchpoint.
 207      Returns 0 on success, -1 on failure and 1 on unsupported.  */
 208
 209   int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 210                        int size, struct raw_breakpoint *bp);
 211   int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
 212                        int size, struct raw_breakpoint *bp);
 213
 214   /* Returns 1 if the target stopped because it executed a software
 215      breakpoint instruction, 0 otherwise.  */
 216   int (*stopped_by_sw_breakpoint) (void);
 217
 218   /* Returns true if the target knows whether a trap was caused by a
 219      SW breakpoint triggering.  */
 220   int (*supports_stopped_by_sw_breakpoint) (void);
 221
 222   /* Returns 1 if the target stopped for a hardware breakpoint.  */
 223   int (*stopped_by_hw_breakpoint) (void);
 224
 225   /* Returns true if the target knows whether a trap was caused by a
 226      HW breakpoint triggering.  */
 227   int (*supports_stopped_by_hw_breakpoint) (void);
 228
 229   /* Returns true if the target can do hardware single step.  */
 230   int (*supports_hardware_single_step) (void);
 231
 232   /* Returns 1 if target was stopped due to a watchpoint hit, 0 otherwise.  */
 233
 234   int (*stopped_by_watchpoint) (void);
 235
 236   /* Returns the address associated with the watchpoint that hit, if any;
 237      returns 0 otherwise.  */
 238
 239   CORE_ADDR (*stopped_data_address) (void);
 240
 241   /* Reports the text, data offsets of the executable.  This is
 242      needed for uclinux where the executable is relocated during load
 243      time.  */
 244
 245   int (*read_offsets) (CORE_ADDR *text, CORE_ADDR *data);
 246
 247   /* Fetch the address associated with a specific thread local storage
 248      area, determined by the specified THREAD, OFFSET, and LOAD_MODULE.
 249      Stores it in *ADDRESS and returns zero on success; otherwise returns
 250      an error code.  A return value of -1 means this system does not
 251      support the operation.  */
 252
 253   int (*get_tls_address) (struct thread_info *thread, CORE_ADDR offset,
 254                           CORE_ADDR load_module, CORE_ADDR *address);
 255
 256    /* Read/Write from/to spufs using qXfer packets.  */
 257   int (*qxfer_spu) (const char *annex, unsigned char *readbuf,
 258                     unsigned const char *writebuf, CORE_ADDR offset, int len);
 259
 260   /* Fill BUF with an hostio error packet representing the last hostio
 261      error.  */
 262   void (*hostio_last_error) (char *buf);
 263
 264   /* Read/Write OS data using qXfer packets.  */
 265   int (*qxfer_osdata) (const char *annex, unsigned char *readbuf,
 266                        unsigned const char *writebuf, CORE_ADDR offset,
 267                        int len);
 268
 269   /* Read/Write extra signal info.  */
 270   int (*qxfer_siginfo) (const char *annex, unsigned char *readbuf,
 271                         unsigned const char *writebuf,
 272                         CORE_ADDR offset, int len);
 273
 274   int (*supports_non_stop) (void);
 275
 276   /* Enables async target events.  Returns the previous enable
 277      state.  */
 278   int (*async) (int enable);
 279
 280   /* Switch to non-stop (1) or all-stop (0) mode.  Return 0 on
 281      success, -1 otherwise.  */
 282   int (*start_non_stop) (int);
 283
 284   /* Returns true if the target supports multi-process debugging.  */
 285   int (*supports_multi_process) (void);
 286
 287   /* Returns true if fork events are supported.  */
 288   int (*supports_fork_events) (void);
 289
 290   /* Returns true if vfork events are supported.  */
 291   int (*supports_vfork_events) (void);
 292
 293   /* Returns true if exec events are supported.  */
 294   int (*supports_exec_events) (void);
 295
 296   /* Allows target to re-initialize connection-specific settings.  */
 297   void (*handle_new_gdb_connection) (void);
 298
 299   /* If not NULL, target-specific routine to process monitor command.
 300      Returns 1 if handled, or 0 to perform default processing.  */
 301   int (*handle_monitor_command) (char *);
 302
 303   /* Returns the core given a thread, or -1 if not known.  */
 304   int (*core_of_thread) (ptid_t);
 305
 306   /* Read loadmaps.  Read LEN bytes at OFFSET into a buffer at MYADDR.  */
 307   int (*read_loadmap) (const char *annex, CORE_ADDR offset,
 308                        unsigned char *myaddr, unsigned int len);
 309
 310   /* Target specific qSupported support.  FEATURES is an array of
 311      features with COUNT elements.  */
 312   void (*process_qsupported) (char **features, int count);
 313
 314   /* Return 1 if the target supports tracepoints, 0 (or leave the
 315      callback NULL) otherwise.  */
 316   int (*supports_tracepoints) (void);
 317
 318   /* Read PC from REGCACHE.  */
 319   CORE_ADDR (*read_pc) (struct regcache *regcache);
 320
 321   /* Write PC to REGCACHE.  */
 322   void (*write_pc) (struct regcache *regcache, CORE_ADDR pc);
 323
 324   /* Return true if THREAD is known to be stopped now.  */
 325   int (*thread_stopped) (struct thread_info *thread);
 326
 327   /* Read Thread Information Block address.  */
 328   int (*get_tib_address) (ptid_t ptid, CORE_ADDR *address);
 329
 330   /* Pause all threads.  If FREEZE, arrange for any resume attempt to
 331      be ignored until an unpause_all call unfreezes threads again.
 332      There can be nested calls to pause_all, so a freeze counter
 333      should be maintained.  */
 334   void (*pause_all) (int freeze);
 335
 336   /* Unpause all threads.  Threads that hadn't been resumed by the
 337      client should be left stopped.  Basically a pause/unpause call
 338      pair should not end up resuming threads that were stopped before
 339      the pause call.  */
 340   void (*unpause_all) (int unfreeze);
 341
 342   /* Stabilize all threads.  That is, force them out of jump pads.  */
 343   void (*stabilize_threads) (void);
 344
 345   /* Install a fast tracepoint jump pad.  TPOINT is the address of the
 346      tracepoint internal object as used by the IPA agent.  TPADDR is
 347      the address of tracepoint.  COLLECTOR is address of the function
 348      the jump pad redirects to.  LOCKADDR is the address of the jump
 349      pad lock object.  ORIG_SIZE is the size in bytes of the
 350      instruction at TPADDR.  JUMP_ENTRY points to the address of the
 351      jump pad entry, and on return holds the address past the end of
 352      the created jump pad.  If a trampoline is created by the function,
 353      then TRAMPOLINE and TRAMPOLINE_SIZE return the address and size of
 354      the trampoline, else they remain unchanged.  JJUMP_PAD_INSN is a
 355      buffer containing a copy of the instruction at TPADDR.
 356      ADJUST_INSN_ADDR and ADJUST_INSN_ADDR_END are output parameters that
 357      return the address range where the instruction at TPADDR was relocated
 358      to.  If an error occurs, the ERR may be used to pass on an error
 359      message.  */
 360   int (*install_fast_tracepoint_jump_pad) (CORE_ADDR tpoint, CORE_ADDR tpaddr,
 361                                            CORE_ADDR collector,
 362                                            CORE_ADDR lockaddr,
 363                                            ULONGEST orig_size,
 364                                            CORE_ADDR *jump_entry,
 365                                            CORE_ADDR *trampoline,
 366                                            ULONGEST *trampoline_size,
 367                                            unsigned char *jjump_pad_insn,
 368                                            ULONGEST *jjump_pad_insn_size,
 369                                            CORE_ADDR *adjusted_insn_addr,
 370                                            CORE_ADDR *adjusted_insn_addr_end,
 371                                            char *err);
 372
 373   /* Return the bytecode operations vector for the current inferior.
 374      Returns NULL if bytecode compilation is not supported.  */
 375   struct emit_ops *(*emit_ops) (void);
 376
 377   /* Returns true if the target supports disabling randomization.  */
 378   int (*supports_disable_randomization) (void);
 379
 380   /* Return the minimum length of an instruction that can be safely overwritten
 381      for use as a fast tracepoint.  */
 382   int (*get_min_fast_tracepoint_insn_len) (void);
 383
 384   /* Read solib info on SVR4 platforms.  */
 385   int (*qxfer_libraries_svr4) (const char *annex, unsigned char *readbuf,
 386                                unsigned const char *writebuf,
 387                                CORE_ADDR offset, int len);
 388
 389   /* Return true if target supports debugging agent.  */
 390   int (*supports_agent) (void);
 391
 392   /* Check whether the target supports branch tracing.  */
 393   int (*supports_btrace) (struct target_ops *, enum btrace_format);
 394
 395   /* Enable branch tracing for PTID based on CONF and allocate a branch trace
 396      target information struct for reading and for disabling branch trace.  */
 397   struct btrace_target_info *(*enable_btrace)
 398     (ptid_t ptid, const struct btrace_config *conf);
 399
 400   /* Disable branch tracing.
 401      Returns zero on success, non-zero otherwise.  */
 402   int (*disable_btrace) (struct btrace_target_info *tinfo);
 403
 404   /* Read branch trace data into buffer.
 405      Return 0 on success; print an error message into BUFFER and return -1,
 406      otherwise.  */
 407   int (*read_btrace) (struct btrace_target_info *, struct buffer *,
 408                       enum btrace_read_type type);
 409
 410   /* Read the branch trace configuration into BUFFER.
 411      Return 0 on success; print an error message into BUFFER and return -1
 412      otherwise.  */
 413   int (*read_btrace_conf) (const struct btrace_target_info *, struct buffer *);
 414
 415   /* Return true if target supports range stepping.  */
 416   int (*supports_range_stepping) (void);
 417
 418   /* Return the full absolute name of the executable file that was
 419      run to create the process PID.  If the executable file cannot
 420      be determined, NULL is returned.  Otherwise, a pointer to a
 421      character string containing the pathname is returned.  This
 422      string should be copied into a buffer by the client if the string
 423      will not be immediately used, or if it must persist.  */
 424   char *(*pid_to_exec_file) (int pid);
 425
 426   /* Multiple-filesystem-aware open.  Like open(2), but operating in
 427      the filesystem as it appears to process PID.  Systems where all
 428      processes share a common filesystem should set this to NULL.
 429      If NULL, the caller should fall back to open(2).  */
 430   int (*multifs_open) (int pid, const char *filename,
 431                        int flags, mode_t mode);
 432
 433   /* Multiple-filesystem-aware unlink.  Like unlink(2), but operates
 434      in the filesystem as it appears to process PID.  Systems where
 435      all processes share a common filesystem should set this to NULL.
 436      If NULL, the caller should fall back to unlink(2).  */
 437   int (*multifs_unlink) (int pid, const char *filename);
 438
 439   /* Multiple-filesystem-aware readlink.  Like readlink(2), but
 440      operating in the filesystem as it appears to process PID.
 441      Systems where all processes share a common filesystem should
 442      set this to NULL.  If NULL, the caller should fall back to
 443      readlink(2).  */
 444   ssize_t (*multifs_readlink) (int pid, const char *filename,
 445                                char *buf, size_t bufsiz);
 446
 447   /* Return the breakpoint kind for this target based on PC.  The PCPTR is
 448      adjusted to the real memory location in case a flag (e.g., the Thumb bit on
 449      ARM) was present in the PC.  */
 450   int (*breakpoint_kind_from_pc) (CORE_ADDR *pcptr);
 451
 452   /* Return the software breakpoint from KIND.  KIND can have target
 453      specific meaning like the Z0 kind parameter.
 454      SIZE is set to the software breakpoint's length in memory.  */
 455   const gdb_byte *(*sw_breakpoint_from_kind) (int kind, int *size);
 456 };
 457
 458 extern struct target_ops *the_target;
 459
 460 void set_target_ops (struct target_ops *);
 461
 462 #define create_inferior(program, args) \
 463   (*the_target->create_inferior) (program, args)
 464
 465 #define target_arch_setup()                      \
 466   do                                             \
 467     {                                            \
 468       if (the_target->arch_setup != NULL)        \
 469         (*the_target->arch_setup) ();            \
 470     } while (0)
 471
 472 #define myattach(pid) \
 473   (*the_target->attach) (pid)
 474
 475 int kill_inferior (int);
 476
 477 #define target_supports_fork_events() \
 478   (the_target->supports_fork_events ? \
 479    (*the_target->supports_fork_events) () : 0)
 480
 481 #define target_supports_vfork_events() \
 482   (the_target->supports_vfork_events ? \
 483    (*the_target->supports_vfork_events) () : 0)
 484
 485 #define target_supports_exec_events() \
 486   (the_target->supports_exec_events ? \
 487    (*the_target->supports_exec_events) () : 0)
 488
 489 #define target_handle_new_gdb_connection()               \
 490   do                                                     \
 491     {                                                    \
 492       if (the_target->handle_new_gdb_connection != NULL) \
 493         (*the_target->handle_new_gdb_connection) ();     \
 494     } while (0)
 495
 496 #define detach_inferior(pid) \
 497   (*the_target->detach) (pid)
 498
 499 #define mourn_inferior(PROC) \
 500   (*the_target->mourn) (PROC)
 501
 502 #define mythread_alive(pid) \
 503   (*the_target->thread_alive) (pid)
 504
 505 #define fetch_inferior_registers(regcache, regno)       \
 506   (*the_target->fetch_registers) (regcache, regno)
 507
 508 #define store_inferior_registers(regcache, regno) \
 509   (*the_target->store_registers) (regcache, regno)
 510
 511 #define join_inferior(pid) \
 512   (*the_target->join) (pid)
 513
 514 #define target_supports_non_stop() \
 515   (the_target->supports_non_stop ? (*the_target->supports_non_stop ) () : 0)
 516
 517 #define target_async(enable) \
 518   (the_target->async ? (*the_target->async) (enable) : 0)
 519
 520 #define target_supports_multi_process() \
 521   (the_target->supports_multi_process ? \
 522    (*the_target->supports_multi_process) () : 0)
 523
 524 #define target_process_qsupported(features, count)      \
 525   do                                                    \
 526     {                                                   \
 527       if (the_target->process_qsupported)               \
 528         the_target->process_qsupported (features, count); \
 529     } while (0)
 530
 531 #define target_supports_tracepoints()                   \
 532   (the_target->supports_tracepoints                     \
 533    ? (*the_target->supports_tracepoints) () : 0)
 534
 535 #define target_supports_fast_tracepoints()              \
 536   (the_target->install_fast_tracepoint_jump_pad != NULL)
 537
 538 #define target_get_min_fast_tracepoint_insn_len()       \
 539   (the_target->get_min_fast_tracepoint_insn_len         \
 540    ? (*the_target->get_min_fast_tracepoint_insn_len) () : 0)
 541
 542 #define thread_stopped(thread) \
 543   (*the_target->thread_stopped) (thread)
 544
 545 #define pause_all(freeze)                       \
 546   do                                            \
 547     {                                           \
 548       if (the_target->pause_all)                \
 549         (*the_target->pause_all) (freeze);      \
 550     } while (0)
 551
 552 #define unpause_all(unfreeze)                   \
 553   do                                            \
 554     {                                           \
 555       if (the_target->unpause_all)              \
 556         (*the_target->unpause_all) (unfreeze);  \
 557     } while (0)
 558
 559 #define stabilize_threads()                     \
 560   do                                            \
 561     {                                           \
 562       if (the_target->stabilize_threads)        \
 563         (*the_target->stabilize_threads) ();    \
 564     } while (0)
 565
 566 #define install_fast_tracepoint_jump_pad(tpoint, tpaddr,                \
 567                                          collector, lockaddr,           \
 568                                          orig_size,                     \
 569                                          jump_entry,                    \
 570                                          trampoline, trampoline_size,   \
 571                                          jjump_pad_insn,                \
 572                                          jjump_pad_insn_size,           \
 573                                          adjusted_insn_addr,            \
 574                                          adjusted_insn_addr_end,        \
 575                                          err)                           \
 576   (*the_target->install_fast_tracepoint_jump_pad) (tpoint, tpaddr,      \
 577                                                    collector,lockaddr,  \
 578                                                    orig_size, jump_entry, \
 579                                                    trampoline,          \
 580                                                    trampoline_size,     \
 581                                                    jjump_pad_insn,      \
 582                                                    jjump_pad_insn_size, \
 583                                                    adjusted_insn_addr,  \
 584                                                    adjusted_insn_addr_end, \
 585                                                    err)
 586
 587 #define target_emit_ops() \
 588   (the_target->emit_ops ? (*the_target->emit_ops) () : NULL)
 589
 590 #define target_supports_disable_randomization() \
 591   (the_target->supports_disable_randomization ? \
 592    (*the_target->supports_disable_randomization) () : 0)
 593
 594 #define target_supports_agent() \
 595   (the_target->supports_agent ? \
 596    (*the_target->supports_agent) () : 0)
 597
 598 #define target_supports_btrace(format)                  \
 599   (the_target->supports_btrace                          \
 600    ? (*the_target->supports_btrace) (the_target, format) : 0)
 601
 602 #define target_enable_btrace(ptid, conf) \
 603   (*the_target->enable_btrace) (ptid, conf)
 604
 605 #define target_disable_btrace(tinfo) \
 606   (*the_target->disable_btrace) (tinfo)
 607
 608 #define target_read_btrace(tinfo, buffer, type) \
 609   (*the_target->read_btrace) (tinfo, buffer, type)
 610
 611 #define target_read_btrace_conf(tinfo, buffer)  \
 612   (*the_target->read_btrace_conf) (tinfo, buffer)
 613
 614 #define target_supports_range_stepping() \
 615   (the_target->supports_range_stepping ? \
 616    (*the_target->supports_range_stepping) () : 0)
 617
 618 #define target_supports_stopped_by_sw_breakpoint() \
 619   (the_target->supports_stopped_by_sw_breakpoint ? \
 620    (*the_target->supports_stopped_by_sw_breakpoint) () : 0)
 621
 622 #define target_stopped_by_sw_breakpoint() \
 623   (the_target->stopped_by_sw_breakpoint ? \
 624    (*the_target->stopped_by_sw_breakpoint) () : 0)
 625
 626 #define target_supports_stopped_by_hw_breakpoint() \
 627   (the_target->supports_stopped_by_hw_breakpoint ? \
 628    (*the_target->supports_stopped_by_hw_breakpoint) () : 0)
 629
 630 #define target_supports_hardware_single_step() \
 631   (the_target->supports_hardware_single_step ? \
 632    (*the_target->supports_hardware_single_step) () : 0)
 633
 634 #define target_stopped_by_hw_breakpoint() \
 635   (the_target->stopped_by_hw_breakpoint ? \
 636    (*the_target->stopped_by_hw_breakpoint) () : 0)
 637
 638 #define target_breakpoint_kind_from_pc(pcptr) \
 639   (the_target->breakpoint_kind_from_pc \
 640    ? (*the_target->breakpoint_kind_from_pc) (pcptr) \
 641    : default_breakpoint_kind_from_pc (pcptr))
 642
 643 /* Start non-stop mode, returns 0 on success, -1 on failure.   */
 644
 645 int start_non_stop (int nonstop);
 646
 647 ptid_t mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
 648                int connected_wait);
 649
 650 #define prepare_to_access_memory()              \
 651   (the_target->prepare_to_access_memory         \
 652    ? (*the_target->prepare_to_access_memory) () \
 653    : 0)
 654
 655 #define done_accessing_memory()                         \
 656   do                                                    \
 657     {                                                   \
 658       if (the_target->done_accessing_memory)            \
 659         (*the_target->done_accessing_memory) ();        \
 660     } while (0)
 661
 662 #define target_core_of_thread(ptid)             \
 663   (the_target->core_of_thread ? (*the_target->core_of_thread) (ptid) \
 664    : -1)
 665
 666 int read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len);
 667
 668 int write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
 669                            int len);
 670
 671 int set_desired_thread (int id);
 672
 673 const char *target_pid_to_str (ptid_t);
 674
 675 int target_can_do_hardware_single_step (void);
 676
 677 int default_breakpoint_kind_from_pc (CORE_ADDR *pcptr);
 678
 679 #endif /* TARGET_H */