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 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 #if !HAVE_DECL_STRERROR
  42 #ifndef strerror
  43 extern char *strerror (int);    /* X3.159-1989  4.11.6.2 */
  44 #endif
  45 #endif
  46
  47 #if !HAVE_DECL_PERROR
  48 #ifndef perror
  49 extern void perror (const char *);
  50 #endif
  51 #endif
  52
  53 #if !HAVE_DECL_MEMMEM
  54 extern void *memmem (const void *, size_t , const void *, size_t);
  55 #endif
  56
  57 #ifndef ATTR_NORETURN
  58 #if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
  59 #define ATTR_NORETURN __attribute__ ((noreturn))
  60 #else
  61 #define ATTR_NORETURN           /* nothing */
  62 #endif
  63 #endif
  64
  65 #ifndef ATTR_FORMAT
  66 #if defined(__GNUC__) && (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 4))
  67 #define ATTR_FORMAT(type, x, y) __attribute__ ((format(type, x, y)))
  68 #else
  69 #define ATTR_FORMAT(type, x, y) /* nothing */
  70 #endif
  71 #endif
  72
  73 #ifndef ATTR_MALLOC
  74 #if defined(__GNUC__) && (__GNUC__ >= 3)
  75 #define ATTR_MALLOC __attribute__ ((__malloc__))
  76 #else
  77 #define ATTR_MALLOC             /* nothing */
  78 #endif
  79 #endif
  80
  81 /* A type used for binary buffers.  */
  82 typedef unsigned char gdb_byte;
  83
  84 /* FIXME: This should probably be autoconf'd for.  It's an integer type at
  85    least the size of a (void *).  */
  86 typedef long long CORE_ADDR;
  87
  88 typedef unsigned long long ULONGEST;
  89
  90 /* The ptid struct is a collection of the various "ids" necessary
  91    for identifying the inferior.  This consists of the process id
  92    (pid), thread id (tid), and other fields necessary for uniquely
  93    identifying the inferior process/thread being debugged.  When
  94    manipulating ptids, the constructors, accessors, and predicate
  95    declared in server.h should be used.  These are as follows:
  96
  97       ptid_build        - Make a new ptid from a pid, lwp, and tid.
  98       pid_to_ptid       - Make a new ptid from just a pid.
  99       ptid_get_pid      - Fetch the pid component of a ptid.
 100       ptid_get_lwp      - Fetch the lwp component of a ptid.
 101       ptid_get_tid      - Fetch the tid component of a ptid.
 102       ptid_equal        - Test to see if two ptids are equal.
 103
 104    Please do NOT access the struct ptid members directly (except, of
 105    course, in the implementation of the above ptid manipulation
 106    functions).  */
 107
 108 struct ptid
 109   {
 110     /* Process id */
 111     int pid;
 112
 113     /* Lightweight process id */
 114     long lwp;
 115
 116     /* Thread id */
 117     long tid;
 118   };
 119
 120 typedef struct ptid ptid_t;
 121
 122 /* The -1 ptid, often used to indicate either an error condition or a
 123    "don't care" condition, i.e, "run all threads".  */
 124 extern ptid_t minus_one_ptid;
 125
 126 /* The null or zero ptid, often used to indicate no process.  */
 127 extern ptid_t null_ptid;
 128
 129 /* Attempt to find and return an existing ptid with the given PID,
 130    LWP, and TID components.  If none exists, create a new one and
 131    return that.  */
 132 ptid_t ptid_build (int pid, long lwp, long tid);
 133
 134 /* Create a ptid from just a pid.  */
 135 ptid_t pid_to_ptid (int pid);
 136
 137 /* Fetch the pid (process id) component from a ptid.  */
 138 int ptid_get_pid (ptid_t ptid);
 139
 140 /* Fetch the lwp (lightweight process) component from a ptid.  */
 141 long ptid_get_lwp (ptid_t ptid);
 142
 143 /* Fetch the tid (thread id) component from a ptid.  */
 144 long ptid_get_tid (ptid_t ptid);
 145
 146 /* Compare two ptids to see if they are equal.  */
 147 extern int ptid_equal (ptid_t p1, ptid_t p2);
 148
 149 /* Return true if this ptid represents a process id.  */
 150 extern int ptid_is_pid (ptid_t ptid);
 151
 152 /* Generic information for tracking a list of ``inferiors'' - threads,
 153    processes, etc.  */
 154 struct inferior_list
 155 {
 156   struct inferior_list_entry *head;
 157   struct inferior_list_entry *tail;
 158 };
 159 struct inferior_list_entry
 160 {
 161   ptid_t id;
 162   struct inferior_list_entry *next;
 163 };
 164
 165 struct thread_info;
 166 struct process_info;
 167 struct regcache;
 168
 169 #include "regcache.h"
 170 #include "gdb/signals.h"
 171 #include "gdb_signals.h"
 172 #include "target.h"
 173 #include "mem-break.h"
 174
 175 struct thread_info
 176 {
 177   struct inferior_list_entry entry;
 178   void *target_data;
 179   void *regcache_data;
 180
 181   /* The last wait status reported for this thread.  */
 182   struct target_waitstatus last_status;
 183 };
 184
 185 struct dll_info
 186 {
 187   struct inferior_list_entry entry;
 188   char *name;
 189   CORE_ADDR base_addr;
 190 };
 191
 192 struct sym_cache;
 193 struct breakpoint;
 194 struct raw_breakpoint;
 195 struct process_info_private;
 196
 197 struct process_info
 198 {
 199   struct inferior_list_entry head;
 200
 201   int attached;
 202
 203   /* The symbol cache.  */
 204   struct sym_cache *symbol_cache;
 205
 206   /* If this flag has been set, assume symbol cache misses are
 207      failures.  */
 208   int all_symbols_looked_up;
 209
 210   /* The list of memory breakpoints.  */
 211   struct breakpoint *breakpoints;
 212
 213   /* The list of raw memory breakpoints.  */
 214   struct raw_breakpoint *raw_breakpoints;
 215
 216   /* Private target data.  */
 217   struct process_info_private *private;
 218 };
 219
 220 /* Return a pointer to the process that corresponds to the current
 221    thread (current_inferior).  It is an error to call this if there is
 222    no current thread selected.  */
 223
 224 struct process_info *current_process (void);
 225 struct process_info *get_thread_process (struct thread_info *);
 226
 227 /* Target-specific functions */
 228
 229 void initialize_low ();
 230
 231 /* From inferiors.c.  */
 232
 233 extern struct inferior_list all_processes;
 234 extern struct inferior_list all_threads;
 235 extern struct inferior_list all_dlls;
 236 extern int dlls_changed;
 237
 238 void initialize_inferiors (void);
 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 extern ptid_t step_thread;
 286
 287 extern int server_waiting;
 288 extern int debug_threads;
 289 extern int debug_hw_points;
 290 extern int pass_signals[];
 291
 292 extern jmp_buf toplevel;
 293
 294 extern int disable_packet_vCont;
 295 extern int disable_packet_Tthread;
 296 extern int disable_packet_qC;
 297 extern int disable_packet_qfThreadInfo;
 298
 299 extern int multi_process;
 300 extern int non_stop;
 301
 302 /* Functions from event-loop.c.  */
 303 typedef void *gdb_client_data;
 304 typedef void (handler_func) (int, gdb_client_data);
 305
 306 extern void delete_file_handler (int fd);
 307 extern void add_file_handler (int fd, handler_func *proc,
 308                               gdb_client_data client_data);
 309
 310 extern void start_event_loop (void);
 311
 312 /* Functions from server.c.  */
 313 extern void handle_serial_event (int err, gdb_client_data client_data);
 314 extern void handle_target_event (int err, gdb_client_data client_data);
 315
 316 extern void push_event (ptid_t ptid, struct target_waitstatus *status);
 317
 318 /* Functions from hostio.c.  */
 319 extern int handle_vFile (char *, int, int *);
 320
 321 /* Functions from hostio-errno.c.  */
 322 extern void hostio_last_error_from_errno (char *own_buf);
 323
 324 /* From remote-utils.c */
 325
 326 extern int remote_debug;
 327 extern int all_symbols_looked_up;
 328 extern int noack_mode;
 329 extern int transport_is_reliable;
 330
 331 ptid_t read_ptid (char *buf, char **obuf);
 332 char *write_ptid (char *buf, ptid_t ptid);
 333
 334 int putpkt (char *buf);
 335 int putpkt_binary (char *buf, int len);
 336 int putpkt_notif (char *buf);
 337 int getpkt (char *buf);
 338 void remote_open (char *name);
 339 void remote_close (void);
 340 void write_ok (char *buf);
 341 void write_enn (char *buf);
 342 void initialize_async_io (void);
 343 void enable_async_io (void);
 344 void disable_async_io (void);
 345 void check_remote_input_interrupt_request (void);
 346 void convert_ascii_to_int (char *from, unsigned char *to, int n);
 347 void convert_int_to_ascii (unsigned char *from, char *to, int n);
 348 void new_thread_notify (int id);
 349 void dead_thread_notify (int id);
 350 void prepare_resume_reply (char *buf, ptid_t ptid,
 351                            struct target_waitstatus *status);
 352
 353 const char *decode_address_to_semicolon (CORE_ADDR *addrp, const char *start);
 354 void decode_address (CORE_ADDR *addrp, const char *start, int len);
 355 void decode_m_packet (char *from, CORE_ADDR * mem_addr_ptr,
 356                       unsigned int *len_ptr);
 357 void decode_M_packet (char *from, CORE_ADDR * mem_addr_ptr,
 358                       unsigned int *len_ptr, unsigned char *to);
 359 int decode_X_packet (char *from, int packet_len, CORE_ADDR * mem_addr_ptr,
 360                      unsigned int *len_ptr, unsigned char *to);
 361 int decode_xfer_write (char *buf, int packet_len, char **annex,
 362                        CORE_ADDR *offset, unsigned int *len,
 363                        unsigned char *data);
 364 int decode_search_memory_packet (const char *buf, int packet_len,
 365                                  CORE_ADDR *start_addrp,
 366                                  CORE_ADDR *search_space_lenp,
 367                                  gdb_byte *pattern, unsigned int *pattern_lenp);
 368
 369 int unhexify (char *bin, const char *hex, int count);
 370 int hexify (char *hex, const char *bin, int count);
 371 int remote_escape_output (const gdb_byte *buffer, int len,
 372                           gdb_byte *out_buf, int *out_len,
 373                           int out_maxlen);
 374
 375 void clear_symbol_cache (struct sym_cache **symcache_p);
 376 int look_up_one_symbol (const char *name, CORE_ADDR *addrp);
 377
 378 void monitor_output (const char *msg);
 379
 380 char *xml_escape_text (const char *text);
 381
 382 /* Simple growing buffer.  */
 383
 384 struct buffer
 385 {
 386   char *buffer;
 387   size_t buffer_size; /* allocated size */
 388   size_t used_size; /* actually used size */
 389 };
 390
 391 /* Append DATA of size SIZE to the end of BUFFER.  Grows the buffer to
 392    accommodate the new data.  */
 393 void buffer_grow (struct buffer *buffer, const char *data, size_t size);
 394
 395 /* Release any memory held by BUFFER.  */
 396 void buffer_free (struct buffer *buffer);
 397
 398 /* Initialize BUFFER.  BUFFER holds no memory afterwards.  */
 399 void buffer_init (struct buffer *buffer);
 400
 401 /* Return a pointer into BUFFER data, effectivelly transfering
 402    ownership of the buffer memory to the caller.  Calling buffer_free
 403    afterwards has no effect on the returned data.  */
 404 char* buffer_finish (struct buffer *buffer);
 405
 406 /* Simple printf to BUFFER function.  Current implemented formatters:
 407    %s - grow an xml escaped text in OBSTACK.  */
 408 void buffer_xml_printf (struct buffer *buffer, const char *format, ...)
 409   ATTR_FORMAT (printf, 2, 3);;
 410
 411 #define buffer_grow_str(BUFFER,STRING)         \
 412   buffer_grow (BUFFER, STRING, strlen (STRING))
 413 #define buffer_grow_str0(BUFFER,STRING)                        \
 414   buffer_grow (BUFFER, STRING, strlen (STRING) + 1)
 415
 416 /* Functions from utils.c */
 417
 418 void *xmalloc (size_t) ATTR_MALLOC;
 419 void *xcalloc (size_t, size_t) ATTR_MALLOC;
 420 char *xstrdup (const char *) ATTR_MALLOC;
 421 void freeargv (char **argv);
 422 void perror_with_name (const char *string);
 423 void error (const char *string,...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 424 void fatal (const char *string,...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 425 void internal_error (const char *file, int line, const char *, ...)
 426      ATTR_NORETURN ATTR_FORMAT (printf, 3, 4);
 427 void warning (const char *string,...) ATTR_FORMAT (printf, 1, 2);
 428 char *paddress (CORE_ADDR addr);
 429
 430 #define gdb_assert(expr)                                                      \
 431   ((void) ((expr) ? 0 :                                                       \
 432            (gdb_assert_fail (#expr, __FILE__, __LINE__, ASSERT_FUNCTION), 0)))
 433
 434 /* Version 2.4 and later of GCC define a magical variable `__PRETTY_FUNCTION__'
 435    which contains the name of the function currently being defined.
 436    This is broken in G++ before version 2.6.
 437    C9x has a similar variable called __func__, but prefer the GCC one since
 438    it demangles C++ function names.  */
 439 #if (GCC_VERSION >= 2004)
 440 #define ASSERT_FUNCTION         __PRETTY_FUNCTION__
 441 #else
 442 #if defined __STDC_VERSION__ && __STDC_VERSION__ >= 199901L
 443 #define ASSERT_FUNCTION         __func__
 444 #endif
 445 #endif
 446
 447 /* This prints an "Assertion failed" message, and exits.  */
 448 #if defined (ASSERT_FUNCTION)
 449 #define gdb_assert_fail(assertion, file, line, function)                \
 450   internal_error (file, line, "%s: Assertion `%s' failed.",             \
 451                   function, assertion)
 452 #else
 453 #define gdb_assert_fail(assertion, file, line, function)                \
 454   internal_error (file, line, "Assertion `%s' failed.",                 \
 455                   assertion)
 456 #endif
 457
 458 /* Maximum number of bytes to read/write at once.  The value here
 459    is chosen to fill up a packet (the headers account for the 32).  */
 460 #define MAXBUFBYTES(N) (((N)-32)/2)
 461
 462 /* Buffer sizes for transferring memory, registers, etc.   Set to a constant
 463    value to accomodate multiple register formats.  This value must be at least
 464    as large as the largest register set supported by gdbserver.  */
 465 #define PBUFSIZ 16384
 466
 467 /* Version information, from version.c.  */
 468 extern const char version[];
 469 extern const char host_name[];
 470
 471 #endif /* SERVER_H */