gdb/gdbserver/server.h

   1 /* Common definitions for remote server for GDB.
   2    Copyright (C) 1993-2013 Free Software Foundation, Inc.
   3
   4    This file is part of GDB.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 #ifndef SERVER_H
  20 #define SERVER_H
  21
  22 #include "config.h"
  23 #include "build-gnulib-gdbserver/config.h"
  24
  25 #ifdef __MINGW32CE__
  26 #include "wincecompat.h"
  27 #endif
  28
  29 #include "libiberty.h"
  30 #include "ansidecl.h"
  31
  32 #include <stdarg.h>
  33 #include <stdio.h>
  34 #include <stdlib.h>
  35 #ifdef HAVE_ERRNO_H
  36 #include <errno.h>
  37 #endif
  38 #include <setjmp.h>
  39
  40 #ifdef HAVE_STRING_H
  41 #include <string.h>
  42 #endif
  43
  44 #ifdef HAVE_ALLOCA_H
  45 #include <alloca.h>
  46 #endif
  47 /* On some systems such as MinGW, alloca is declared in malloc.h
  48    (there is no alloca.h).  */
  49 #if HAVE_MALLOC_H
  50 #include <malloc.h>
  51 #endif
  52
  53 #if !HAVE_DECL_STRERROR
  54 #ifndef strerror
  55 extern char *strerror (int);    /* X3.159-1989  4.11.6.2 */
  56 #endif
  57 #endif
  58
  59 #if !HAVE_DECL_PERROR
  60 #ifndef perror
  61 extern void perror (const char *);
  62 #endif
  63 #endif
  64
  65 #if !HAVE_DECL_VASPRINTF
  66 extern int vasprintf(char **strp, const char *fmt, va_list ap);
  67 #endif
  68 #if !HAVE_DECL_VSNPRINTF
  69 int vsnprintf(char *str, size_t size, const char *format, va_list ap);
  70 #endif
  71
  72 /* Define underscore macro, if not available, to be able to use it inside
  73    code shared with gdb in common directory.  */
  74 #ifndef _
  75 #define _(String) (String)
  76 #endif
  77
  78 #ifdef IN_PROCESS_AGENT
  79 #  define PROG "ipa"
  80 #else
  81 #  define PROG "gdbserver"
  82 #endif
  83
  84 /* A type used for binary buffers.  */
  85 typedef unsigned char gdb_byte;
  86
  87 #include "ptid.h"
  88 #include "buffer.h"
  89 #include "xml-utils.h"
  90 #include "gdb_locale.h"
  91
  92 /* FIXME: This should probably be autoconf'd for.  It's an integer type at
  93    least the size of a (void *).  */
  94 typedef long long CORE_ADDR;
  95
  96 typedef long long LONGEST;
  97 typedef unsigned long long ULONGEST;
  98
  99 /* Generic information for tracking a list of ``inferiors'' - threads,
 100    processes, etc.  */
 101 struct inferior_list
 102 {
 103   struct inferior_list_entry *head;
 104   struct inferior_list_entry *tail;
 105 };
 106 struct inferior_list_entry
 107 {
 108   ptid_t id;
 109   struct inferior_list_entry *next;
 110 };
 111
 112 struct thread_info;
 113 struct process_info;
 114 struct regcache;
 115
 116 #include "regcache.h"
 117 #include "gdb/signals.h"
 118 #include "gdb_signals.h"
 119 #include "target.h"
 120 #include "mem-break.h"
 121 #include "gdbthread.h"
 122
 123 struct dll_info
 124 {
 125   struct inferior_list_entry entry;
 126   char *name;
 127   CORE_ADDR base_addr;
 128 };
 129
 130 struct sym_cache;
 131 struct breakpoint;
 132 struct raw_breakpoint;
 133 struct fast_tracepoint_jump;
 134 struct process_info_private;
 135
 136 struct process_info
 137 {
 138   struct inferior_list_entry head;
 139
 140   /* Nonzero if this child process was attached rather than
 141      spawned.  */
 142   int attached;
 143
 144   /* True if GDB asked us to detach from this process, but we remained
 145      attached anyway.  */
 146   int gdb_detached;
 147
 148   /* The symbol cache.  */
 149   struct sym_cache *symbol_cache;
 150
 151   /* The list of memory breakpoints.  */
 152   struct breakpoint *breakpoints;
 153
 154   /* The list of raw memory breakpoints.  */
 155   struct raw_breakpoint *raw_breakpoints;
 156
 157   /* The list of installed fast tracepoints.  */
 158   struct fast_tracepoint_jump *fast_tracepoint_jumps;
 159
 160   /* Private target data.  */
 161   struct process_info_private *private;
 162 };
 163
 164 /* Return a pointer to the process that corresponds to the current
 165    thread (current_inferior).  It is an error to call this if there is
 166    no current thread selected.  */
 167
 168 struct process_info *current_process (void);
 169 struct process_info *get_thread_process (struct thread_info *);
 170
 171 /* Target-specific functions */
 172
 173 void initialize_low ();
 174
 175 /* From inferiors.c.  */
 176
 177 extern struct inferior_list all_processes;
 178 extern struct inferior_list all_dlls;
 179 extern int dlls_changed;
 180 extern void clear_dlls (void);
 181
 182 void add_inferior_to_list (struct inferior_list *list,
 183                            struct inferior_list_entry *new_inferior);
 184 void for_each_inferior (struct inferior_list *list,
 185                         void (*action) (struct inferior_list_entry *));
 186
 187 extern struct thread_info *current_inferior;
 188 void remove_inferior (struct inferior_list *list,
 189                       struct inferior_list_entry *entry);
 190
 191 struct process_info *add_process (int pid, int attached);
 192 void remove_process (struct process_info *process);
 193 struct process_info *find_process_pid (int pid);
 194 int have_started_inferiors_p (void);
 195 int have_attached_inferiors_p (void);
 196
 197 ptid_t thread_id_to_gdb_id (ptid_t);
 198 ptid_t thread_to_gdb_id (struct thread_info *);
 199 ptid_t gdb_id_to_thread_id (ptid_t);
 200
 201 void clear_inferiors (void);
 202 struct inferior_list_entry *find_inferior
 203      (struct inferior_list *,
 204       int (*func) (struct inferior_list_entry *,
 205                    void *),
 206       void *arg);
 207 struct inferior_list_entry *find_inferior_id (struct inferior_list *list,
 208                                               ptid_t id);
 209 void *inferior_target_data (struct thread_info *);
 210 void set_inferior_target_data (struct thread_info *, void *);
 211 void *inferior_regcache_data (struct thread_info *);
 212 void set_inferior_regcache_data (struct thread_info *, void *);
 213
 214 void loaded_dll (const char *name, CORE_ADDR base_addr);
 215 void unloaded_dll (const char *name, CORE_ADDR base_addr);
 216
 217 /* Public variables in server.c */
 218
 219 extern ptid_t cont_thread;
 220 extern ptid_t general_thread;
 221
 222 extern int server_waiting;
 223 extern int debug_threads;
 224 extern int debug_hw_points;
 225 extern int pass_signals[];
 226 extern int program_signals[];
 227 extern int program_signals_p;
 228
 229 extern jmp_buf toplevel;
 230
 231 extern int disable_packet_vCont;
 232 extern int disable_packet_Tthread;
 233 extern int disable_packet_qC;
 234 extern int disable_packet_qfThreadInfo;
 235
 236 extern int run_once;
 237 extern int multi_process;
 238 extern int non_stop;
 239
 240 extern int disable_randomization;
 241
 242 #if USE_WIN32API
 243 #include <winsock2.h>
 244 typedef SOCKET gdb_fildes_t;
 245 #else
 246 typedef int gdb_fildes_t;
 247 #endif
 248
 249 /* Functions from event-loop.c.  */
 250 typedef void *gdb_client_data;
 251 typedef int (handler_func) (int, gdb_client_data);
 252 typedef int (callback_handler_func) (gdb_client_data);
 253
 254 extern void delete_file_handler (gdb_fildes_t fd);
 255 extern void add_file_handler (gdb_fildes_t fd, handler_func *proc,
 256                               gdb_client_data client_data);
 257 extern int append_callback_event (callback_handler_func *proc,
 258                                    gdb_client_data client_data);
 259 extern void delete_callback_event (int id);
 260
 261 extern void start_event_loop (void);
 262
 263 /* Functions from server.c.  */
 264 extern int handle_serial_event (int err, gdb_client_data client_data);
 265 extern int handle_target_event (int err, gdb_client_data client_data);
 266
 267 /* Functions from hostio.c.  */
 268 extern int handle_vFile (char *, int, int *);
 269
 270 /* Functions from hostio-errno.c.  */
 271 extern void hostio_last_error_from_errno (char *own_buf);
 272
 273 /* From remote-utils.c */
 274
 275 extern int remote_debug;
 276 extern int noack_mode;
 277 extern int transport_is_reliable;
 278
 279 int gdb_connected (void);
 280
 281 #define STDIO_CONNECTION_NAME "stdio"
 282 int remote_connection_is_stdio (void);
 283
 284 ptid_t read_ptid (char *buf, char **obuf);
 285 char *write_ptid (char *buf, ptid_t ptid);
 286
 287 int putpkt (char *buf);
 288 int putpkt_binary (char *buf, int len);
 289 int putpkt_notif (char *buf);
 290 int getpkt (char *buf);
 291 void remote_prepare (char *name);
 292 void remote_open (char *name);
 293 void remote_close (void);
 294 void write_ok (char *buf);
 295 void write_enn (char *buf);
 296 void initialize_async_io (void);
 297 void enable_async_io (void);
 298 void disable_async_io (void);
 299 void check_remote_input_interrupt_request (void);
 300 void convert_ascii_to_int (const char *from, unsigned char *to, int n);
 301 void convert_int_to_ascii (const unsigned char *from, char *to, int n);
 302 void new_thread_notify (int id);
 303 void dead_thread_notify (int id);
 304 void prepare_resume_reply (char *buf, ptid_t ptid,
 305                            struct target_waitstatus *status);
 306
 307 const char *decode_address_to_semicolon (CORE_ADDR *addrp, const char *start);
 308 void decode_address (CORE_ADDR *addrp, const char *start, int len);
 309 void decode_m_packet (char *from, CORE_ADDR * mem_addr_ptr,
 310                       unsigned int *len_ptr);
 311 void decode_M_packet (char *from, CORE_ADDR * mem_addr_ptr,
 312                       unsigned int *len_ptr, unsigned char **to_p);
 313 int decode_X_packet (char *from, int packet_len, CORE_ADDR * mem_addr_ptr,
 314                      unsigned int *len_ptr, unsigned char **to_p);
 315 int decode_xfer_write (char *buf, int packet_len,
 316                        CORE_ADDR *offset, unsigned int *len,
 317                        unsigned char *data);
 318 int decode_search_memory_packet (const char *buf, int packet_len,
 319                                  CORE_ADDR *start_addrp,
 320                                  CORE_ADDR *search_space_lenp,
 321                                  gdb_byte *pattern,
 322                                  unsigned int *pattern_lenp);
 323
 324 int unhexify (char *bin, const char *hex, int count);
 325 int hexify (char *hex, const char *bin, int count);
 326 int remote_escape_output (const gdb_byte *buffer, int len,
 327                           gdb_byte *out_buf, int *out_len,
 328                           int out_maxlen);
 329 char *unpack_varlen_hex (char *buff,  ULONGEST *result);
 330
 331 void clear_symbol_cache (struct sym_cache **symcache_p);
 332 int look_up_one_symbol (const char *name, CORE_ADDR *addrp, int may_ask_gdb);
 333
 334 int relocate_instruction (CORE_ADDR *to, CORE_ADDR oldloc);
 335
 336 void monitor_output (const char *msg);
 337
 338 /* Functions from utils.c */
 339 #include "common-utils.h"
 340
 341 void perror_with_name (const char *string);
 342 void error (const char *string,...) ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (1, 2);
 343 void fatal (const char *string,...) ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF (1, 2);
 344 void warning (const char *string,...) ATTRIBUTE_PRINTF (1, 2);
 345 char *paddress (CORE_ADDR addr);
 346 char *pulongest (ULONGEST u);
 347 char *plongest (LONGEST l);
 348 char *phex_nz (ULONGEST l, int sizeof_l);
 349 char *pfildes (gdb_fildes_t fd);
 350
 351 #include "gdb_assert.h"
 352
 353 /* Maximum number of bytes to read/write at once.  The value here
 354    is chosen to fill up a packet (the headers account for the 32).  */
 355 #define MAXBUFBYTES(N) (((N)-32)/2)
 356
 357 /* Buffer sizes for transferring memory, registers, etc.   Set to a constant
 358    value to accomodate multiple register formats.  This value must be at least
 359    as large as the largest register set supported by gdbserver.  */
 360 #define PBUFSIZ 16384
 361
 362 /* Functions from tracepoint.c */
 363
 364 /* Size for a small buffer to report problems from the in-process
 365    agent back to GDBserver.  */
 366 #define IPA_BUFSIZ 100
 367
 368 void initialize_tracepoint (void);
 369
 370 extern int tracing;
 371 extern int disconnected_tracing;
 372
 373 void tracepoint_look_up_symbols (void);
 374
 375 void stop_tracing (void);
 376
 377 int handle_tracepoint_general_set (char *own_buf);
 378 int handle_tracepoint_query (char *own_buf);
 379
 380 int tracepoint_finished_step (struct thread_info *tinfo, CORE_ADDR stop_pc);
 381 int tracepoint_was_hit (struct thread_info *tinfo, CORE_ADDR stop_pc);
 382
 383 void release_while_stepping_state_list (struct thread_info *tinfo);
 384
 385 extern int current_traceframe;
 386
 387 int in_readonly_region (CORE_ADDR addr, ULONGEST length);
 388 int traceframe_read_mem (int tfnum, CORE_ADDR addr,
 389                          unsigned char *buf, ULONGEST length,
 390                          ULONGEST *nbytes);
 391 int fetch_traceframe_registers (int tfnum,
 392                                 struct regcache *regcache,
 393                                 int regnum);
 394
 395 int traceframe_read_sdata (int tfnum, ULONGEST offset,
 396                            unsigned char *buf, ULONGEST length,
 397                            ULONGEST *nbytes);
 398
 399 int traceframe_read_info (int tfnum, struct buffer *buffer);
 400
 401 /* If a thread is determined to be collecting a fast tracepoint, this
 402    structure holds the collect status.  */
 403
 404 struct fast_tpoint_collect_status
 405 {
 406   /* The tracepoint that is presently being collected.  */
 407   int tpoint_num;
 408   CORE_ADDR tpoint_addr;
 409
 410   /* The address range in the jump pad of where the original
 411      instruction the tracepoint jump was inserted was relocated
 412      to.  */
 413   CORE_ADDR adjusted_insn_addr;
 414   CORE_ADDR adjusted_insn_addr_end;
 415 };
 416
 417 int fast_tracepoint_collecting (CORE_ADDR thread_area,
 418                                 CORE_ADDR stop_pc,
 419                                 struct fast_tpoint_collect_status *status);
 420 void force_unlock_trace_buffer (void);
 421
 422 int handle_tracepoint_bkpts (struct thread_info *tinfo, CORE_ADDR stop_pc);
 423
 424 #ifdef IN_PROCESS_AGENT
 425 void initialize_low_tracepoint (void);
 426 void supply_fast_tracepoint_registers (struct regcache *regcache,
 427                                        const unsigned char *regs);
 428 void supply_static_tracepoint_registers (struct regcache *regcache,
 429                                          const unsigned char *regs,
 430                                          CORE_ADDR pc);
 431 void set_trampoline_buffer_space (CORE_ADDR begin, CORE_ADDR end,
 432                                   char *errmsg);
 433 #else
 434 void stop_tracing (void);
 435
 436 int claim_trampoline_space (ULONGEST used, CORE_ADDR *trampoline);
 437 int have_fast_tracepoint_trampoline_buffer (char *msgbuf);
 438 void gdb_agent_about_to_close (int pid);
 439 #endif
 440
 441 struct traceframe;
 442 struct eval_agent_expr_context;
 443
 444 /* Do memory copies for bytecodes.  */
 445 /* Do the recording of memory blocks for actions and bytecodes.  */
 446
 447 int agent_mem_read (struct eval_agent_expr_context *ctx,
 448                     unsigned char *to, CORE_ADDR from,
 449                     ULONGEST len);
 450
 451 LONGEST agent_get_trace_state_variable_value (int num);
 452 void agent_set_trace_state_variable_value (int num, LONGEST val);
 453
 454 /* Record the value of a trace state variable.  */
 455
 456 int agent_tsv_read (struct eval_agent_expr_context *ctx, int n);
 457 int agent_mem_read_string (struct eval_agent_expr_context *ctx,
 458                            unsigned char *to,
 459                            CORE_ADDR from,
 460                            ULONGEST len);
 461
 462 /* Bytecode compilation function vector.  */
 463
 464 struct emit_ops
 465 {
 466   void (*emit_prologue) (void);
 467   void (*emit_epilogue) (void);
 468   void (*emit_add) (void);
 469   void (*emit_sub) (void);
 470   void (*emit_mul) (void);
 471   void (*emit_lsh) (void);
 472   void (*emit_rsh_signed) (void);
 473   void (*emit_rsh_unsigned) (void);
 474   void (*emit_ext) (int arg);
 475   void (*emit_log_not) (void);
 476   void (*emit_bit_and) (void);
 477   void (*emit_bit_or) (void);
 478   void (*emit_bit_xor) (void);
 479   void (*emit_bit_not) (void);
 480   void (*emit_equal) (void);
 481   void (*emit_less_signed) (void);
 482   void (*emit_less_unsigned) (void);
 483   void (*emit_ref) (int size);
 484   void (*emit_if_goto) (int *offset_p, int *size_p);
 485   void (*emit_goto) (int *offset_p, int *size_p);
 486   void (*write_goto_address) (CORE_ADDR from, CORE_ADDR to, int size);
 487   void (*emit_const) (LONGEST num);
 488   void (*emit_call) (CORE_ADDR fn);
 489   void (*emit_reg) (int reg);
 490   void (*emit_pop) (void);
 491   void (*emit_stack_flush) (void);
 492   void (*emit_zero_ext) (int arg);
 493   void (*emit_swap) (void);
 494   void (*emit_stack_adjust) (int n);
 495
 496   /* Emit code for a generic function that takes one fixed integer
 497      argument and returns a 64-bit int (for instance, tsv getter).  */
 498   void (*emit_int_call_1) (CORE_ADDR fn, int arg1);
 499
 500   /* Emit code for a generic function that takes one fixed integer
 501      argument and a 64-bit int from the top of the stack, and returns
 502      nothing (for instance, tsv setter).  */
 503   void (*emit_void_call_2) (CORE_ADDR fn, int arg1);
 504
 505   /* Emit code specialized for common combinations of compare followed
 506      by a goto.  */
 507   void (*emit_eq_goto) (int *offset_p, int *size_p);
 508   void (*emit_ne_goto) (int *offset_p, int *size_p);
 509   void (*emit_lt_goto) (int *offset_p, int *size_p);
 510   void (*emit_le_goto) (int *offset_p, int *size_p);
 511   void (*emit_gt_goto) (int *offset_p, int *size_p);
 512   void (*emit_ge_goto) (int *offset_p, int *size_p);
 513 };
 514
 515 /* Returns the address of the get_raw_reg function in the IPA.  */
 516 CORE_ADDR get_raw_reg_func_addr (void);
 517 /* Returns the address of the get_trace_state_variable_value
 518    function in the IPA.  */
 519 CORE_ADDR get_get_tsv_func_addr (void);
 520 /* Returns the address of the set_trace_state_variable_value
 521    function in the IPA.  */
 522 CORE_ADDR get_set_tsv_func_addr (void);
 523
 524 extern CORE_ADDR current_insn_ptr;
 525 extern int emit_error;
 526
 527 /* Version information, from version.c.  */
 528 extern const char version[];
 529 extern const char host_name[];
 530
 531 #endif /* SERVER_H */