gdb/gdbserver/server.h

   1 /* Common definitions for remote server for GDB.
   2    Copyright (C) 1993, 1995, 1997-2000, 2002-2012 Free Software
   3    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_VASPRINTF
  63 extern int vasprintf(char **strp, const char *fmt, va_list ap);
  64 #endif
  65 #if !HAVE_DECL_VSNPRINTF
  66 int vsnprintf(char *str, size_t size, const char *format, va_list ap);
  67 #endif
  68
  69 #ifndef ATTR_NORETURN
  70 #if defined(__GNUC__) && (__GNUC__ > 2 \
  71                           || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7))
  72 #define ATTR_NORETURN __attribute__ ((noreturn))
  73 #else
  74 #define ATTR_NORETURN           /* nothing */
  75 #endif
  76 #endif
  77
  78 #ifndef ATTR_FORMAT
  79 #if defined(__GNUC__) && (__GNUC__ > 2 \
  80                           || (__GNUC__ == 2 && __GNUC_MINOR__ >= 4))
  81 #define ATTR_FORMAT(type, x, y) __attribute__ ((format(type, x, y)))
  82 #else
  83 #define ATTR_FORMAT(type, x, y) /* nothing */
  84 #endif
  85 #endif
  86
  87 #ifndef ATTR_MALLOC
  88 #if defined(__GNUC__) && (__GNUC__ >= 3)
  89 #define ATTR_MALLOC __attribute__ ((__malloc__))
  90 #else
  91 #define ATTR_MALLOC             /* nothing */
  92 #endif
  93 #endif
  94
  95 /* Define underscore macro, if not available, to be able to use it inside
  96    code shared with gdb in common directory.  */
  97 #ifndef _
  98 #define _(String) (String)
  99 #endif
 100
 101 #ifdef IN_PROCESS_AGENT
 102 #  define PROG "ipa"
 103 #else
 104 #  define PROG "gdbserver"
 105 #endif
 106
 107 /* A type used for binary buffers.  */
 108 typedef unsigned char gdb_byte;
 109
 110 #include "ptid.h"
 111 #include "buffer.h"
 112 #include "xml-utils.h"
 113 #include "gdb_locale.h"
 114
 115 /* FIXME: This should probably be autoconf'd for.  It's an integer type at
 116    least the size of a (void *).  */
 117 typedef long long CORE_ADDR;
 118
 119 typedef long long LONGEST;
 120 typedef unsigned long long ULONGEST;
 121
 122 /* Generic information for tracking a list of ``inferiors'' - threads,
 123    processes, etc.  */
 124 struct inferior_list
 125 {
 126   struct inferior_list_entry *head;
 127   struct inferior_list_entry *tail;
 128 };
 129 struct inferior_list_entry
 130 {
 131   ptid_t id;
 132   struct inferior_list_entry *next;
 133 };
 134
 135 struct thread_info;
 136 struct process_info;
 137 struct regcache;
 138
 139 #include "regcache.h"
 140 #include "gdb/signals.h"
 141 #include "gdb_signals.h"
 142 #include "target.h"
 143 #include "mem-break.h"
 144 #include "gdbthread.h"
 145
 146 struct dll_info
 147 {
 148   struct inferior_list_entry entry;
 149   char *name;
 150   CORE_ADDR base_addr;
 151 };
 152
 153 struct sym_cache;
 154 struct breakpoint;
 155 struct raw_breakpoint;
 156 struct fast_tracepoint_jump;
 157 struct process_info_private;
 158
 159 struct process_info
 160 {
 161   struct inferior_list_entry head;
 162
 163   /* Nonzero if this child process was attached rather than
 164      spawned.  */
 165   int attached;
 166
 167   /* True if GDB asked us to detach from this process, but we remained
 168      attached anyway.  */
 169   int gdb_detached;
 170
 171   /* The symbol cache.  */
 172   struct sym_cache *symbol_cache;
 173
 174   /* The list of memory breakpoints.  */
 175   struct breakpoint *breakpoints;
 176
 177   /* The list of raw memory breakpoints.  */
 178   struct raw_breakpoint *raw_breakpoints;
 179
 180   /* The list of installed fast tracepoints.  */
 181   struct fast_tracepoint_jump *fast_tracepoint_jumps;
 182
 183   /* Private target data.  */
 184   struct process_info_private *private;
 185 };
 186
 187 /* Return a pointer to the process that corresponds to the current
 188    thread (current_inferior).  It is an error to call this if there is
 189    no current thread selected.  */
 190
 191 struct process_info *current_process (void);
 192 struct process_info *get_thread_process (struct thread_info *);
 193
 194 /* Target-specific functions */
 195
 196 void initialize_low ();
 197
 198 /* From inferiors.c.  */
 199
 200 extern struct inferior_list all_processes;
 201 extern struct inferior_list all_dlls;
 202 extern int dlls_changed;
 203 extern void clear_dlls (void);
 204
 205 void add_inferior_to_list (struct inferior_list *list,
 206                            struct inferior_list_entry *new_inferior);
 207 void for_each_inferior (struct inferior_list *list,
 208                         void (*action) (struct inferior_list_entry *));
 209
 210 extern struct thread_info *current_inferior;
 211 void remove_inferior (struct inferior_list *list,
 212                       struct inferior_list_entry *entry);
 213
 214 struct process_info *add_process (int pid, int attached);
 215 void remove_process (struct process_info *process);
 216 struct process_info *find_process_pid (int pid);
 217 int have_started_inferiors_p (void);
 218 int have_attached_inferiors_p (void);
 219
 220 ptid_t thread_id_to_gdb_id (ptid_t);
 221 ptid_t thread_to_gdb_id (struct thread_info *);
 222 ptid_t gdb_id_to_thread_id (ptid_t);
 223
 224 void clear_inferiors (void);
 225 struct inferior_list_entry *find_inferior
 226      (struct inferior_list *,
 227       int (*func) (struct inferior_list_entry *,
 228                    void *),
 229       void *arg);
 230 struct inferior_list_entry *find_inferior_id (struct inferior_list *list,
 231                                               ptid_t id);
 232 void *inferior_target_data (struct thread_info *);
 233 void set_inferior_target_data (struct thread_info *, void *);
 234 void *inferior_regcache_data (struct thread_info *);
 235 void set_inferior_regcache_data (struct thread_info *, void *);
 236
 237 void loaded_dll (const char *name, CORE_ADDR base_addr);
 238 void unloaded_dll (const char *name, CORE_ADDR base_addr);
 239
 240 /* Public variables in server.c */
 241
 242 extern ptid_t cont_thread;
 243 extern ptid_t general_thread;
 244
 245 extern int server_waiting;
 246 extern int debug_threads;
 247 extern int debug_hw_points;
 248 extern int pass_signals[];
 249 extern int program_signals[];
 250 extern int program_signals_p;
 251
 252 extern jmp_buf toplevel;
 253
 254 extern int disable_packet_vCont;
 255 extern int disable_packet_Tthread;
 256 extern int disable_packet_qC;
 257 extern int disable_packet_qfThreadInfo;
 258
 259 extern int run_once;
 260 extern int multi_process;
 261 extern int non_stop;
 262
 263 extern int disable_randomization;
 264
 265 #if USE_WIN32API
 266 #include <winsock2.h>
 267 typedef SOCKET gdb_fildes_t;
 268 #else
 269 typedef int gdb_fildes_t;
 270 #endif
 271
 272 /* Functions from event-loop.c.  */
 273 typedef void *gdb_client_data;
 274 typedef int (handler_func) (int, gdb_client_data);
 275 typedef int (callback_handler_func) (gdb_client_data);
 276
 277 extern void delete_file_handler (gdb_fildes_t fd);
 278 extern void add_file_handler (gdb_fildes_t fd, handler_func *proc,
 279                               gdb_client_data client_data);
 280 extern int append_callback_event (callback_handler_func *proc,
 281                                    gdb_client_data client_data);
 282 extern void delete_callback_event (int id);
 283
 284 extern void start_event_loop (void);
 285
 286 /* Functions from server.c.  */
 287 extern int handle_serial_event (int err, gdb_client_data client_data);
 288 extern int handle_target_event (int err, gdb_client_data client_data);
 289
 290 extern void push_event (ptid_t ptid, struct target_waitstatus *status);
 291
 292 /* Functions from hostio.c.  */
 293 extern int handle_vFile (char *, int, int *);
 294
 295 /* Functions from hostio-errno.c.  */
 296 extern void hostio_last_error_from_errno (char *own_buf);
 297
 298 /* From remote-utils.c */
 299
 300 extern int remote_debug;
 301 extern int noack_mode;
 302 extern int transport_is_reliable;
 303
 304 int gdb_connected (void);
 305
 306 #define STDIO_CONNECTION_NAME "stdio"
 307 int remote_connection_is_stdio (void);
 308
 309 ptid_t read_ptid (char *buf, char **obuf);
 310 char *write_ptid (char *buf, ptid_t ptid);
 311
 312 int putpkt (char *buf);
 313 int putpkt_binary (char *buf, int len);
 314 int putpkt_notif (char *buf);
 315 int getpkt (char *buf);
 316 void remote_prepare (char *name);
 317 void remote_open (char *name);
 318 void remote_close (void);
 319 void write_ok (char *buf);
 320 void write_enn (char *buf);
 321 void initialize_async_io (void);
 322 void enable_async_io (void);
 323 void disable_async_io (void);
 324 void check_remote_input_interrupt_request (void);
 325 void convert_ascii_to_int (const char *from, unsigned char *to, int n);
 326 void convert_int_to_ascii (const unsigned char *from, char *to, int n);
 327 void new_thread_notify (int id);
 328 void dead_thread_notify (int id);
 329 void prepare_resume_reply (char *buf, ptid_t ptid,
 330                            struct target_waitstatus *status);
 331
 332 const char *decode_address_to_semicolon (CORE_ADDR *addrp, const char *start);
 333 void decode_address (CORE_ADDR *addrp, const char *start, int len);
 334 void decode_m_packet (char *from, CORE_ADDR * mem_addr_ptr,
 335                       unsigned int *len_ptr);
 336 void decode_M_packet (char *from, CORE_ADDR * mem_addr_ptr,
 337                       unsigned int *len_ptr, unsigned char **to_p);
 338 int decode_X_packet (char *from, int packet_len, CORE_ADDR * mem_addr_ptr,
 339                      unsigned int *len_ptr, unsigned char **to_p);
 340 int decode_xfer_write (char *buf, int packet_len,
 341                        CORE_ADDR *offset, unsigned int *len,
 342                        unsigned char *data);
 343 int decode_search_memory_packet (const char *buf, int packet_len,
 344                                  CORE_ADDR *start_addrp,
 345                                  CORE_ADDR *search_space_lenp,
 346                                  gdb_byte *pattern,
 347                                  unsigned int *pattern_lenp);
 348
 349 int unhexify (char *bin, const char *hex, int count);
 350 int hexify (char *hex, const char *bin, int count);
 351 int remote_escape_output (const gdb_byte *buffer, int len,
 352                           gdb_byte *out_buf, int *out_len,
 353                           int out_maxlen);
 354 char *unpack_varlen_hex (char *buff,  ULONGEST *result);
 355
 356 void clear_symbol_cache (struct sym_cache **symcache_p);
 357 int look_up_one_symbol (const char *name, CORE_ADDR *addrp, int may_ask_gdb);
 358
 359 int relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc);
 360
 361 void monitor_output (const char *msg);
 362
 363 /* Functions from utils.c */
 364 #include "common-utils.h"
 365
 366 void *xmalloc (size_t) ATTR_MALLOC;
 367 void *xrealloc (void *, size_t);
 368 void *xcalloc (size_t, size_t) ATTR_MALLOC;
 369 char *xstrdup (const char *) ATTR_MALLOC;
 370 int xsnprintf (char *str, size_t size, const char *format, ...)
 371   ATTR_FORMAT (printf, 3, 4);;
 372 void freeargv (char **argv);
 373 void perror_with_name (const char *string);
 374 void error (const char *string,...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 375 void fatal (const char *string,...) ATTR_NORETURN ATTR_FORMAT (printf, 1, 2);
 376 void warning (const char *string,...) ATTR_FORMAT (printf, 1, 2);
 377 char *paddress (CORE_ADDR addr);
 378 char *pulongest (ULONGEST u);
 379 char *plongest (LONGEST l);
 380 char *phex_nz (ULONGEST l, int sizeof_l);
 381 char *pfildes (gdb_fildes_t fd);
 382
 383 #include "gdb_assert.h"
 384
 385 /* Maximum number of bytes to read/write at once.  The value here
 386    is chosen to fill up a packet (the headers account for the 32).  */
 387 #define MAXBUFBYTES(N) (((N)-32)/2)
 388
 389 /* Buffer sizes for transferring memory, registers, etc.   Set to a constant
 390    value to accomodate multiple register formats.  This value must be at least
 391    as large as the largest register set supported by gdbserver.  */
 392 #define PBUFSIZ 16384
 393
 394 /* Functions from tracepoint.c */
 395
 396 /* Size for a small buffer to report problems from the in-process
 397    agent back to GDBserver.  */
 398 #define IPA_BUFSIZ 100
 399
 400 void initialize_tracepoint (void);
 401
 402 extern int tracing;
 403 extern int disconnected_tracing;
 404
 405 void tracepoint_look_up_symbols (void);
 406
 407 void stop_tracing (void);
 408
 409 int handle_tracepoint_general_set (char *own_buf);
 410 int handle_tracepoint_query (char *own_buf);
 411
 412 int tracepoint_finished_step (struct thread_info *tinfo, CORE_ADDR stop_pc);
 413 int tracepoint_was_hit (struct thread_info *tinfo, CORE_ADDR stop_pc);
 414
 415 void release_while_stepping_state_list (struct thread_info *tinfo);
 416
 417 extern int current_traceframe;
 418
 419 int in_readonly_region (CORE_ADDR addr, ULONGEST length);
 420 int traceframe_read_mem (int tfnum, CORE_ADDR addr,
 421                          unsigned char *buf, ULONGEST length,
 422                          ULONGEST *nbytes);
 423 int fetch_traceframe_registers (int tfnum,
 424                                 struct regcache *regcache,
 425                                 int regnum);
 426
 427 int traceframe_read_sdata (int tfnum, ULONGEST offset,
 428                            unsigned char *buf, ULONGEST length,
 429                            ULONGEST *nbytes);
 430
 431 int traceframe_read_info (int tfnum, struct buffer *buffer);
 432
 433 /* If a thread is determined to be collecting a fast tracepoint, this
 434    structure holds the collect status.  */
 435
 436 struct fast_tpoint_collect_status
 437 {
 438   /* The tracepoint that is presently being collected.  */
 439   int tpoint_num;
 440   CORE_ADDR tpoint_addr;
 441
 442   /* The address range in the jump pad of where the original
 443      instruction the tracepoint jump was inserted was relocated
 444      to.  */
 445   CORE_ADDR adjusted_insn_addr;
 446   CORE_ADDR adjusted_insn_addr_end;
 447 };
 448
 449 int fast_tracepoint_collecting (CORE_ADDR thread_area,
 450                                 CORE_ADDR stop_pc,
 451                                 struct fast_tpoint_collect_status *status);
 452 void force_unlock_trace_buffer (void);
 453
 454 int handle_tracepoint_bkpts (struct thread_info *tinfo, CORE_ADDR stop_pc);
 455
 456 #ifdef IN_PROCESS_AGENT
 457 void initialize_low_tracepoint (void);
 458 void supply_fast_tracepoint_registers (struct regcache *regcache,
 459                                        const unsigned char *regs);
 460 void supply_static_tracepoint_registers (struct regcache *regcache,
 461                                          const unsigned char *regs,
 462                                          CORE_ADDR pc);
 463 void set_trampoline_buffer_space (CORE_ADDR begin, CORE_ADDR end,
 464                                   char *errmsg);
 465 #else
 466 void stop_tracing (void);
 467
 468 int claim_trampoline_space (ULONGEST used, CORE_ADDR *trampoline);
 469 int have_fast_tracepoint_trampoline_buffer (char *msgbuf);
 470 void gdb_agent_about_to_close (int pid);
 471 #endif
 472
 473 struct traceframe;
 474
 475 /* Do memory copies for bytecodes.  */
 476 /* Do the recording of memory blocks for actions and bytecodes.  */
 477
 478 int agent_mem_read (struct traceframe *tframe,
 479                     unsigned char *to, CORE_ADDR from,
 480                     ULONGEST len);
 481
 482 LONGEST agent_get_trace_state_variable_value (int num);
 483 void agent_set_trace_state_variable_value (int num, LONGEST val);
 484
 485 /* Record the value of a trace state variable.  */
 486
 487 int agent_tsv_read (struct traceframe *tframe, int n);
 488 int agent_mem_read_string (struct traceframe *tframe,
 489                            unsigned char *to,
 490                            CORE_ADDR from,
 491                            ULONGEST len);
 492
 493 /* Bytecode compilation function vector.  */
 494
 495 struct emit_ops
 496 {
 497   void (*emit_prologue) (void);
 498   void (*emit_epilogue) (void);
 499   void (*emit_add) (void);
 500   void (*emit_sub) (void);
 501   void (*emit_mul) (void);
 502   void (*emit_lsh) (void);
 503   void (*emit_rsh_signed) (void);
 504   void (*emit_rsh_unsigned) (void);
 505   void (*emit_ext) (int arg);
 506   void (*emit_log_not) (void);
 507   void (*emit_bit_and) (void);
 508   void (*emit_bit_or) (void);
 509   void (*emit_bit_xor) (void);
 510   void (*emit_bit_not) (void);
 511   void (*emit_equal) (void);
 512   void (*emit_less_signed) (void);
 513   void (*emit_less_unsigned) (void);
 514   void (*emit_ref) (int size);
 515   void (*emit_if_goto) (int *offset_p, int *size_p);
 516   void (*emit_goto) (int *offset_p, int *size_p);
 517   void (*write_goto_address) (CORE_ADDR from, CORE_ADDR to, int size);
 518   void (*emit_const) (LONGEST num);
 519   void (*emit_call) (CORE_ADDR fn);
 520   void (*emit_reg) (int reg);
 521   void (*emit_pop) (void);
 522   void (*emit_stack_flush) (void);
 523   void (*emit_zero_ext) (int arg);
 524   void (*emit_swap) (void);
 525   void (*emit_stack_adjust) (int n);
 526
 527   /* Emit code for a generic function that takes one fixed integer
 528      argument and returns a 64-bit int (for instance, tsv getter).  */
 529   void (*emit_int_call_1) (CORE_ADDR fn, int arg1);
 530
 531   /* Emit code for a generic function that takes one fixed integer
 532      argument and a 64-bit int from the top of the stack, and returns
 533      nothing (for instance, tsv setter).  */
 534   void (*emit_void_call_2) (CORE_ADDR fn, int arg1);
 535
 536   /* Emit code specialized for common combinations of compare followed
 537      by a goto.  */
 538   void (*emit_eq_goto) (int *offset_p, int *size_p);
 539   void (*emit_ne_goto) (int *offset_p, int *size_p);
 540   void (*emit_lt_goto) (int *offset_p, int *size_p);
 541   void (*emit_le_goto) (int *offset_p, int *size_p);
 542   void (*emit_gt_goto) (int *offset_p, int *size_p);
 543   void (*emit_ge_goto) (int *offset_p, int *size_p);
 544 };
 545
 546 /* Returns the address of the get_raw_reg function in the IPA.  */
 547 CORE_ADDR get_raw_reg_func_addr (void);
 548 /* Returns the address of the get_trace_state_variable_value
 549    function in the IPA.  */
 550 CORE_ADDR get_get_tsv_func_addr (void);
 551 /* Returns the address of the set_trace_state_variable_value
 552    function in the IPA.  */
 553 CORE_ADDR get_set_tsv_func_addr (void);
 554
 555 CORE_ADDR current_insn_ptr;
 556 int emit_error;
 557
 558 /* Version information, from version.c.  */
 559 extern const char version[];
 560 extern const char host_name[];
 561
 562 #endif /* SERVER_H */