gdb/gdbserver/server.h

   1 /* Common definitions for remote server for GDB.
   2    Copyright (C) 1993, 1995, 1997, 1998, 1999, 2000, 2002, 2003, 2004, 2005,
   3    2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef SERVER_H
  21 #define SERVER_H
  22
  23 #include "config.h"
  24
  25 #ifdef __MINGW32CE__
  26 #include "wincecompat.h"
  27 #endif
  28
  29 #include <stdarg.h>
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #ifdef HAVE_ERRNO_H
  33 #include <errno.h>
  34 #endif
  35 #include <setjmp.h>
  36
  37 #ifdef HAVE_STRING_H
  38 #include <string.h>
  39 #endif
  40
  41 #ifdef HAVE_ALLOCA_H
  42 #include <alloca.h>
  43 #endif
  44 /* On some systems such as MinGW, alloca is declared in malloc.h
  45    (there is no alloca.h).  */
  46 #if HAVE_MALLOC_H
  47 #include <malloc.h>
  48 #endif
  49
  50 #if !HAVE_DECL_STRERROR
  51 #ifndef strerror
  52 extern char *strerror (int);    /* X3.159-1989  4.11.6.2 */
  53 #endif
  54 #endif
  55
  56 #if !HAVE_DECL_PERROR
  57 #ifndef perror
  58 extern void perror (const char *);
  59 #endif
  60 #endif
  61
  62 #if !HAVE_DECL_MEMMEM
  63 extern void *memmem (const void *, size_t , const void *, size_t);
  64 #endif
  65
  66 #if !HAVE_DECL_VASPRINTF
  67 extern int vasprintf(char **strp, const char *fmt, va_list ap);
  68 #endif
  69 #if !HAVE_DECL_VSNPRINTF
  70 int vsnprintf(char *str, size_t size, const char *format, va_list ap);
  71 #endif
  72
  73 #ifndef ATTR_NORETURN
  74 #if defined(__GNUC__) && (__GNUC__ > 2 \
  75                           || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
  76 #define ATTR_NORETURN __attribute__ ((noreturn))
  77 #else
  78 #define ATTR_NORETURN           /* nothing */
  79 #endif
  80 #endif
  81
  82 #ifndef ATTR_FORMAT
  83 #if defined(__GNUC__) && (__GNUC__ > 2 \
  84                           || (__GNUC__ == 2 && __GNUC_MINOR__ >= 4))
  85 #define ATTR_FORMAT(type, x, y) __attribute__ ((format(type, x, y)))
  86 #else
  87 #define ATTR_FORMAT(type, x, y) /* nothing */
  88 #endif
  89 #endif
  90
  91 #ifndef ATTR_MALLOC
  92 #if defined(__GNUC__) && (__GNUC__ >= 3)
  93 #define ATTR_MALLOC __attribute__ ((__malloc__))
  94 #else
  95 #define ATTR_MALLOC             /* nothing */
  96 #endif
  97 #endif
  98
  99 /* Define underscore macro, if not available, to be able to use it inside
 100    code shared with gdb in common directory.  */
 101 #ifndef _
 102 #define _(String) (String)
 103 #endif
 104
 105 /* A type used for binary buffers.  */
 106 typedef unsigned char gdb_byte;
 107
 108 #include "ptid.h"
 109 #include "buffer.h"
 110 #include "xml-utils.h"
 111 #include "gdb_locale.h"
 112
 113 /* FIXME: This should probably be autoconf'd for.  It's an integer type at
 114    least the size of a (void *).  */
 115 typedef long long CORE_ADDR;
 116
 117 typedef long long LONGEST;
 118 typedef unsigned long long ULONGEST;
 119
 120 /* Generic information for tracking a list of ``inferiors'' - threads,
 121    processes, etc.  */
 122 struct inferior_list
 123 {
 124   struct inferior_list_entry *head;
 125   struct inferior_list_entry *tail;
 126 };
 127 struct inferior_list_entry
 128 {
 129   ptid_t id;
 130   struct inferior_list_entry *next;
 131 };
 132
 133 struct thread_info;
 134 struct process_info;
 135 struct regcache;
 136
 137 #include "regcache.h"
 138 #include "gdb/signals.h"
 139 #include "gdb_signals.h"
 140 #include "target.h"
 141 #include "mem-break.h"
 142
 143 struct thread_info
 144 {
 145   struct inferior_list_entry entry;
 146   void *target_data;
 147   void *regcache_data;
 148
 149   /* The last resume GDB requested on this thread.  */
 150   enum resume_kind last_resume_kind;
 151
 152   /* The last wait status reported for this thread.  */
 153   struct target_waitstatus last_status;
 154
 155   /* Given `while-stepping', a thread may be collecting data for more
 156      than one tracepoint simultaneously.  E.g.:
 157
 158     ff0001  INSN1 <-- TP1, while-stepping 10 collect $regs
 159     ff0002  INSN2
 160     ff0003  INSN3 <-- TP2, collect $regs
 161     ff0004  INSN4 <-- TP3, while-stepping 10 collect $regs
 162     ff0005  INSN5
 163
 164    Notice that when instruction INSN5 is reached, the while-stepping
 165    actions of both TP1 and TP3 are still being collected, and that TP2
 166    had been collected meanwhile.  The whole range of ff0001-ff0005
 167    should be single-stepped, due to at least TP1's while-stepping
 168    action covering the whole range.
 169
 170    On the other hand, the same tracepoint with a while-stepping action
 171    may be hit by more than one thread simultaneously, hence we can't
 172    keep the current step count in the tracepoint itself.
 173
 174    This is the head of the list of the states of `while-stepping'
 175    tracepoint actions this thread is now collecting; NULL if empty.
 176    Each item in the list holds the current step of the while-stepping
 177    action.  */
 178   struct wstep_state *while_stepping;
 179 };
 180
 181 struct dll_info
 182 {
 183   struct inferior_list_entry entry;
 184   char *name;
 185   CORE_ADDR base_addr;
 186 };
 187
 188 struct sym_cache;
 189 struct breakpoint;
 190 struct raw_breakpoint;
 191 struct fast_tracepoint_jump;
 192 struct process_info_private;
 193
 194 struct process_info
 195 {
 196   struct inferior_list_entry head;
 197
 198   /* Nonzero if this child process was attached rather than
 199      spawned.  */
 200   int attached;
 201
 202   /* True if GDB asked us to detach from this process, but we remained
 203      attached anyway.  */
 204   int gdb_detached;
 205
 206   /* The symbol cache.  */
 207   struct sym_cache *symbol_cache;
 208
 209   /* The list of memory breakpoints.  */
 210   struct breakpoint *breakpoints;
 211
 212   /* The list of raw memory breakpoints.  */
 213   struct raw_breakpoint *raw_breakpoints;
 214
 215   /* The list of installed fast tracepoints.  */
 216   struct fast_tracepoint_jump *fast_tracepoint_jumps;
 217
 218   /* Private target data.  */
 219   struct process_info_private *private;
 220 };
 221
 222 /* Return a pointer to the process that corresponds to the current
 223    thread (current_inferior).  It is an error to call this if there is
 224    no current thread selected.  */
 225
 226 struct process_info *current_process (void);
 227 struct process_info *get_thread_process (struct thread_info *);
 228
 229 /* Target-specific functions */
 230
 231 void initialize_low ();
 232
 233 /* From inferiors.c.  */
 234
 235 extern struct inferior_list all_processes;
 236 extern struct inferior_list all_threads;
 237 extern struct inferior_list all_dlls;
 238 extern int dlls_changed;
 239
 240 void add_inferior_to_list (struct inferior_list *list,
 241                            struct inferior_list_entry *new_inferior);
 242 void for_each_inferior (struct inferior_list *list,
 243                         void (*action) (struct inferior_list_entry *));
 244
 245 extern struct thread_info *current_inferior;
 246 void remove_inferior (struct inferior_list *list,
 247                       struct inferior_list_entry *entry);
 248 void remove_thread (struct thread_info *thread);
 249 void add_thread (ptid_t ptid, void *target_data);
 250
 251 struct process_info *add_process (int pid, int attached);
 252 void remove_process (struct process_info *process);
 253 struct process_info *find_process_pid (int pid);
 254 int have_started_inferiors_p (void);
 255 int have_attached_inferiors_p (void);
 256
 257 struct thread_info *find_thread_ptid (ptid_t ptid);
 258
 259 ptid_t thread_id_to_gdb_id (ptid_t);
 260 ptid_t thread_to_gdb_id (struct thread_info *);
 261 ptid_t gdb_id_to_thread_id (ptid_t);
 262 struct thread_info *gdb_id_to_thread (unsigned int);
 263 void clear_inferiors (void);
 264 struct inferior_list_entry *find_inferior
 265      (struct inferior_list *,
 266       int (*func) (struct inferior_list_entry *,
 267                    void *),
 268       void *arg);
 269 struct inferior_list_entry *find_inferior_id (struct inferior_list *list,
 270                                               ptid_t id);
 271 void *inferior_target_data (struct thread_info *);
 272 void set_inferior_target_data (struct thread_info *, void *);
 273 void *inferior_regcache_data (struct thread_info *);
 274 void set_inferior_regcache_data (struct thread_info *, void *);
 275 void add_pid_to_list (struct inferior_list *list, unsigned long pid);
 276 int pull_pid_from_list (struct inferior_list *list, unsigned long pid);
 277
 278 void loaded_dll (const char *name, CORE_ADDR base_addr);
 279 void unloaded_dll (const char *name, CORE_ADDR base_addr);
 280
 281 /* Public variables in server.c */
 282
 283 extern ptid_t cont_thread;
 284 extern ptid_t general_thread;
 285
 286 extern int server_waiting;
 287 extern int debug_threads;
 288 extern int debug_hw_points;
 289 extern int pass_signals[];
 290
 291 extern jmp_buf toplevel;
 292
 293 extern int disable_packet_vCont;
 294 extern int disable_packet_Tthread;
 295 extern int disable_packet_qC;
 296 extern int disable_packet_qfThreadInfo;
 297
 298 extern int run_once;
 299 extern int multi_process;
 300 extern int non_stop;
 301
 302 #if USE_WIN32API
 303 #include <winsock2.h>
 304 typedef SOCKET gdb_fildes_t;
 305 #else
 306 typedef int gdb_fildes_t;
 307 #endif
 308
 309 /* Functions from event-loop.c.  */
 310 typedef void *gdb_client_data;
 311 typedef int (handler_func) (int, gdb_client_data);
 312 typedef int (callback_handler_func) (gdb_client_data);
 313
 314 extern void delete_file_handler (gdb_fildes_t fd);
 315 extern void add_file_handler (gdb_fildes_t fd, handler_func *proc,
 316                               gdb_client_data client_data);
 317 extern int append_callback_event (callback_handler_func *proc,
 318                                    gdb_client_data client_data);
 319 extern void delete_callback_event (int id);
 320
 321 extern void start_event_loop (void);
 322
 323 /* Functions from server.c.  */
 324 extern int handle_serial_event (int err, gdb_client_data client_data);
 325 extern int handle_target_event (int err, gdb_client_data client_data);
 326
 327 extern void push_event (ptid_t ptid, struct target_waitstatus *status);
 328
 329 /* Functions from hostio.c.  */
 330 extern int handle_vFile (char *, int, int *);
 331
 332 /* Functions from hostio-errno.c.  */
 333 extern void hostio_last_error_from_errno (char *own_buf);
 334
 335 /* From remote-utils.c */
 336
 337 extern int remote_debug;
 338 extern int noack_mode;
 339 extern int transport_is_reliable;
 340
 341 int gdb_connected (void);
 342
 343 ptid_t read_ptid (char *buf, char **obuf);
 344 char *write_ptid (char *buf, ptid_t ptid);
 345
 346 int putpkt (char *buf);
 347 int putpkt_binary (char *buf, int len);
 348 int putpkt_notif (char *buf);
 349 int getpkt (char *buf);
 350 void remote_prepare (char *name);
 351 void remote_open (char *name);
 352 void remote_close (void);
 353 void write_ok (char *buf);
 354 void write_enn (char *buf);
 355 void initialize_async_io (void);
 356 void enable_async_io (void);
 357 void disable_async_io (void);
 358 void check_remote_input_interrupt_request (void);
 359 void convert_ascii_to_int (const char *from, unsigned char *to, int n);
 360 void convert_int_to_ascii (const unsigned char *from, char *to, int n);
 361 void new_thread_notify (int id);
 362 void dead_thread_notify (int id);
 363 void prepare_resume_reply (char *buf, ptid_t ptid,
 364                            struct target_waitstatus *status);
 365
 366 const char *decode_address_to_semicolon (CORE_ADDR *addrp, const char *start);
 367 void decode_address (CORE_ADDR *addrp, const char *start, int len);
 368 void decode_m_packet (char *from, CORE_ADDR * mem_addr_ptr,
 369                       unsigned int *len_ptr);
 370 void decode_M_packet (char *from, CORE_ADDR * mem_addr_ptr,
 371                       unsigned int *len_ptr, unsigned char **to_p);
 372 int decode_X_packet (char *from, int packet_len, CORE_ADDR * mem_addr_ptr,
 373                      unsigned int *len_ptr, unsigned char **to_p);
 374 int decode_xfer_write (char *buf, int packet_len,
 375                        CORE_ADDR *offset, unsigned int *len,
 376                        unsigned char *data);
 377 int decode_search_memory_packet (const char *buf, int packet_len,
 378                                  CORE_ADDR *start_addrp,
 379                                  CORE_ADDR *search_space_lenp,
 380                                  gdb_byte *pattern,
 381                                  unsigned int *pattern_lenp);
 382
 383 int unhexify (char *bin, const char *hex, int count);
 384 int hexify (char *hex, const char *bin, int count);
 385 int remote_escape_output (const gdb_byte *buffer, int len,
 386                           gdb_byte *out_buf, int *out_len,
 387                           int out_maxlen);
 388 char *unpack_varlen_hex (char *buff,  ULONGEST *result);
 389
 390 void clear_symbol_cache (struct sym_cache **symcache_p);
 391 int look_up_one_symbol (const char *name, CORE_ADDR *addrp, int may_ask_gdb);
 392
 393 int relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc);
 394
 395 void monitor_output (const char *msg);
 396
 397 /* Functions from utils.c */
 398 #include "common-utils.h"
 399
 400 void *xmalloc (size_t) ATTR_MALLOC;
 401 void *xrealloc (void *, size_t);
 402 void *xcalloc (size_t, size_t) ATTR_MALLOC;
 403 char *xstrdup (const char *) ATTR_MALLOC;
 404 int xsnprintf (char *str, size_t size, const char *format, ...)
 405   ATTR_FORMAT (printf, 3, 4);;
 406 void freeargv (char **argv);
 407 void perror_with_name (const char *string);
 408 void error (const char *string,...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 409 void fatal (const char *string,...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 410 void warning (const char *string,...) ATTR_FORMAT (printf, 1, 2);
 411 char *paddress (CORE_ADDR addr);
 412 char *pulongest (ULONGEST u);
 413 char *plongest (LONGEST l);
 414 char *phex_nz (ULONGEST l, int sizeof_l);
 415 char *pfildes (gdb_fildes_t fd);
 416
 417 #include "gdb_assert.h"
 418
 419 /* Maximum number of bytes to read/write at once.  The value here
 420    is chosen to fill up a packet (the headers account for the 32).  */
 421 #define MAXBUFBYTES(N) (((N)-32)/2)
 422
 423 /* Buffer sizes for transferring memory, registers, etc.   Set to a constant
 424    value to accomodate multiple register formats.  This value must be at least
 425    as large as the largest register set supported by gdbserver.  */
 426 #define PBUFSIZ 16384
 427
 428 /* Functions from tracepoint.c */
 429
 430 int in_process_agent_loaded (void);
 431
 432 void initialize_tracepoint (void);
 433
 434 extern int tracing;
 435 extern int disconnected_tracing;
 436
 437 void tracepoint_look_up_symbols (void);
 438
 439 void stop_tracing (void);
 440
 441 int handle_tracepoint_general_set (char *own_buf);
 442 int handle_tracepoint_query (char *own_buf);
 443
 444 int tracepoint_finished_step (struct thread_info *tinfo, CORE_ADDR stop_pc);
 445 int tracepoint_was_hit (struct thread_info *tinfo, CORE_ADDR stop_pc);
 446
 447 void release_while_stepping_state_list (struct thread_info *tinfo);
 448
 449 extern int current_traceframe;
 450
 451 int in_readonly_region (CORE_ADDR addr, ULONGEST length);
 452 int traceframe_read_mem (int tfnum, CORE_ADDR addr,
 453                          unsigned char *buf, ULONGEST length,
 454                          ULONGEST *nbytes);
 455 int fetch_traceframe_registers (int tfnum,
 456                                 struct regcache *regcache,
 457                                 int regnum);
 458
 459 int traceframe_read_sdata (int tfnum, ULONGEST offset,
 460                            unsigned char *buf, ULONGEST length,
 461                            ULONGEST *nbytes);
 462
 463 int traceframe_read_info (int tfnum, struct buffer *buffer);
 464
 465 /* If a thread is determined to be collecting a fast tracepoint, this
 466    structure holds the collect status.  */
 467
 468 struct fast_tpoint_collect_status
 469 {
 470   /* The tracepoint that is presently being collected.  */
 471   int tpoint_num;
 472   CORE_ADDR tpoint_addr;
 473
 474   /* The address range in the jump pad of where the original
 475      instruction the tracepoint jump was inserted was relocated
 476      to.  */
 477   CORE_ADDR adjusted_insn_addr;
 478   CORE_ADDR adjusted_insn_addr_end;
 479 };
 480
 481 int fast_tracepoint_collecting (CORE_ADDR thread_area,
 482                                 CORE_ADDR stop_pc,
 483                                 struct fast_tpoint_collect_status *status);
 484 void force_unlock_trace_buffer (void);
 485
 486 int handle_tracepoint_bkpts (struct thread_info *tinfo, CORE_ADDR stop_pc);
 487
 488 #ifdef IN_PROCESS_AGENT
 489 void initialize_low_tracepoint (void);
 490 void supply_fast_tracepoint_registers (struct regcache *regcache,
 491                                        const unsigned char *regs);
 492 void supply_static_tracepoint_registers (struct regcache *regcache,
 493                                          const unsigned char *regs,
 494                                          CORE_ADDR pc);
 495 #else
 496 void stop_tracing (void);
 497 #endif
 498
 499 /* Bytecode compilation function vector.  */
 500
 501 struct emit_ops
 502 {
 503   void (*emit_prologue) (void);
 504   void (*emit_epilogue) (void);
 505   void (*emit_add) (void);
 506   void (*emit_sub) (void);
 507   void (*emit_mul) (void);
 508   void (*emit_lsh) (void);
 509   void (*emit_rsh_signed) (void);
 510   void (*emit_rsh_unsigned) (void);
 511   void (*emit_ext) (int arg);
 512   void (*emit_log_not) (void);
 513   void (*emit_bit_and) (void);
 514   void (*emit_bit_or) (void);
 515   void (*emit_bit_xor) (void);
 516   void (*emit_bit_not) (void);
 517   void (*emit_equal) (void);
 518   void (*emit_less_signed) (void);
 519   void (*emit_less_unsigned) (void);
 520   void (*emit_ref) (int size);
 521   void (*emit_if_goto) (int *offset_p, int *size_p);
 522   void (*emit_goto) (int *offset_p, int *size_p);
 523   void (*write_goto_address) (CORE_ADDR from, CORE_ADDR to, int size);
 524   void (*emit_const) (LONGEST num);
 525   void (*emit_call) (CORE_ADDR fn);
 526   void (*emit_reg) (int reg);
 527   void (*emit_pop) (void);
 528   void (*emit_stack_flush) (void);
 529   void (*emit_zero_ext) (int arg);
 530   void (*emit_swap) (void);
 531   void (*emit_stack_adjust) (int n);
 532
 533   /* Emit code for a generic function that takes one fixed integer
 534      argument and returns a 64-bit int (for instance, tsv getter).  */
 535   void (*emit_int_call_1) (CORE_ADDR fn, int arg1);
 536
 537   /* Emit code for a generic function that takes one fixed integer
 538      argument and a 64-bit int from the top of the stack, and returns
 539      nothing (for instance, tsv setter).  */
 540   void (*emit_void_call_2) (CORE_ADDR fn, int arg1);
 541 };
 542
 543 /* Returns the address of the get_raw_reg function in the IPA.  */
 544 CORE_ADDR get_raw_reg_func_addr (void);
 545
 546 CORE_ADDR current_insn_ptr;
 547 int emit_error;
 548
 549 /* Version information, from version.c.  */
 550 extern const char version[];
 551 extern const char host_name[];
 552
 553 #endif /* SERVER_H */