gdbserver/server.h

   1 /* Common definitions for remote server for GDB.
   2    Copyright (C) 1993-2020 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 GDBSERVER_SERVER_H
  20 #define GDBSERVER_SERVER_H
  21
  22 #include "gdbsupport/common-defs.h"
  23
  24 #undef PACKAGE
  25 #undef PACKAGE_NAME
  26 #undef PACKAGE_VERSION
  27 #undef PACKAGE_STRING
  28 #undef PACKAGE_TARNAME
  29
  30 #include <config.h>
  31
  32 gdb_static_assert (sizeof (CORE_ADDR) >= sizeof (void *));
  33
  34 #include "gdbsupport/version.h"
  35
  36 #if !HAVE_DECL_PERROR
  37 #ifndef perror
  38 extern void perror (const char *);
  39 #endif
  40 #endif
  41
  42 #if !HAVE_DECL_VASPRINTF
  43 extern int vasprintf(char **strp, const char *fmt, va_list ap);
  44 #endif
  45 #if !HAVE_DECL_VSNPRINTF
  46 int vsnprintf(char *str, size_t size, const char *format, va_list ap);
  47 #endif
  48
  49 #ifdef IN_PROCESS_AGENT
  50 #  define PROG "ipa"
  51 #else
  52 #  define PROG "gdbserver"
  53 #endif
  54
  55 #include "gdbsupport/buffer.h"
  56 #include "gdbsupport/xml-utils.h"
  57 #include "regcache.h"
  58 #include "gdbsupport/gdb_signals.h"
  59 #include "target.h"
  60 #include "mem-break.h"
  61 #include "gdbsupport/environ.h"
  62
  63 /* Target-specific functions */
  64
  65 void initialize_low ();
  66
  67 /* Public variables in server.c */
  68
  69 extern bool server_waiting;
  70
  71 extern bool disable_packet_vCont;
  72 extern bool disable_packet_Tthread;
  73 extern bool disable_packet_qC;
  74 extern bool disable_packet_qfThreadInfo;
  75 extern bool disable_packet_T;
  76
  77 extern bool run_once;
  78 extern bool non_stop;
  79
  80 #include "gdbsupport/event-loop.h"
  81
  82 /* Functions from server.c.  */
  83 extern void handle_v_requests (char *own_buf, int packet_len,
  84                                int *new_packet_len);
  85 extern void handle_serial_event (int err, gdb_client_data client_data);
  86 extern void handle_target_event (int err, gdb_client_data client_data);
  87
  88 /* Get rid of the currently pending stop replies that match PTID.  */
  89 extern void discard_queued_stop_replies (ptid_t ptid);
  90
  91 /* Returns true if there's a pending stop reply that matches PTID in
  92    the vStopped notifications queue.  */
  93 extern int in_queued_stop_replies (ptid_t ptid);
  94
  95 #include "remote-utils.h"
  96
  97 #include "utils.h"
  98 #include "debug.h"
  99 #include "gdbsupport/gdb_vecs.h"
 100
 101 /* Maximum number of bytes to read/write at once.  The value here
 102    is chosen to fill up a packet (the headers account for the 32).  */
 103 #define MAXBUFBYTES(N) (((N)-32)/2)
 104
 105 /* Buffer sizes for transferring memory, registers, etc.   Set to a constant
 106    value to accomodate multiple register formats.  This value must be at least
 107    as large as the largest register set supported by gdbserver.  */
 108 #define PBUFSIZ 18432
 109
 110 /* Definition for an unknown syscall, used basically in error-cases.  */
 111 #define UNKNOWN_SYSCALL (-1)
 112
 113 /* Definition for any syscall, used for unfiltered syscall reporting.  */
 114 #define ANY_SYSCALL (-2)
 115
 116 /* After fork_inferior has been called, we need to adjust a few
 117    signals and call startup_inferior to start the inferior and consume
 118    its first events.  This is done here.  PID is the pid of the new
 119    inferior and PROGRAM is its name.  */
 120 extern void post_fork_inferior (int pid, const char *program);
 121
 122 /* Get the gdb_environ being used in the current session.  */
 123 extern gdb_environ *get_environ ();
 124
 125 extern unsigned long signal_pid;
 126
 127
 128 /* Description of the client remote protocol state for the currently
 129    connected client.  */
 130
 131 struct client_state
 132 {
 133   client_state ():
 134     own_buf ((char *) xmalloc (PBUFSIZ + 1))
 135   {}
 136
 137   /* The thread set with an `Hc' packet.  `Hc' is deprecated in favor of
 138      `vCont'.  Note the multi-process extensions made `vCont' a
 139      requirement, so `Hc pPID.TID' is pretty much undefined.  So
 140      CONT_THREAD can be null_ptid for no `Hc' thread, minus_one_ptid for
 141      resuming all threads of the process (again, `Hc' isn't used for
 142      multi-process), or a specific thread ptid_t.  */
 143   ptid_t cont_thread;
 144
 145   /* The thread set with an `Hg' packet.  */
 146   ptid_t general_thread;
 147
 148   int multi_process = 0;
 149   int report_fork_events = 0;
 150   int report_vfork_events = 0;
 151   int report_exec_events = 0;
 152   int report_thread_events = 0;
 153
 154   /* True if the "swbreak+" feature is active.  In that case, GDB wants
 155      us to report whether a trap is explained by a software breakpoint
 156      and for the server to handle PC adjustment if necessary on this
 157      target.  Only enabled if the target supports it.  */
 158   int swbreak_feature = 0;
 159   /* True if the "hwbreak+" feature is active.  In that case, GDB wants
 160      us to report whether a trap is explained by a hardware breakpoint.
 161      Only enabled if the target supports it.  */
 162   int hwbreak_feature = 0;
 163
 164   /* True if the "vContSupported" feature is active.  In that case, GDB
 165      wants us to report whether single step is supported in the reply to
 166      "vCont?" packet.  */
 167   int vCont_supported = 0;
 168
 169   /* Whether we should attempt to disable the operating system's address
 170      space randomization feature before starting an inferior.  */
 171   int disable_randomization = 1;
 172
 173   int pass_signals[GDB_SIGNAL_LAST];
 174   int program_signals[GDB_SIGNAL_LAST];
 175   int program_signals_p = 0;
 176
 177   /* Last status reported to GDB.  */
 178   struct target_waitstatus last_status;
 179   ptid_t last_ptid;
 180
 181   char *own_buf;
 182
 183   /* If true, then GDB has requested noack mode.  */
 184   int noack_mode = 0;
 185   /* If true, then we tell GDB to use noack mode by default.  */
 186   int transport_is_reliable = 0;
 187
 188   /* The traceframe to be used as the source of data to send back to
 189      GDB.  A value of -1 means to get data from the live program.  */
 190
 191   int current_traceframe = -1;
 192
 193 };
 194
 195 client_state &get_client_state ();
 196
 197 #include "gdbthread.h"
 198 #include "inferiors.h"
 199
 200 #endif /* GDBSERVER_SERVER_H */