gdb/gdbserver/target.c

   1 /* Target operations for the remote server for GDB.
   2    Copyright (C) 2002-2013 Free Software Foundation, Inc.
   3
   4    Contributed by MontaVista Software.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #include "server.h"
  22
  23 struct target_ops *the_target;
  24
  25 void
  26 set_desired_inferior (int use_general)
  27 {
  28   struct thread_info *found;
  29
  30   if (use_general == 1)
  31     found = find_thread_ptid (general_thread);
  32   else
  33     found = find_thread_ptid (cont_thread);
  34
  35   if (found == NULL)
  36     current_inferior = (struct thread_info *) all_threads.head;
  37   else
  38     current_inferior = found;
  39 }
  40
  41 int
  42 read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
  43 {
  44   int res;
  45   res = (*the_target->read_memory) (memaddr, myaddr, len);
  46   check_mem_read (memaddr, myaddr, len);
  47   return res;
  48 }
  49
  50 int
  51 write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
  52                        int len)
  53 {
  54   /* Lacking cleanups, there is some potential for a memory leak if the
  55      write fails and we go through error().  Make sure that no more than
  56      one buffer is ever pending by making BUFFER static.  */
  57   static unsigned char *buffer = 0;
  58   int res;
  59
  60   if (buffer != NULL)
  61     free (buffer);
  62
  63   buffer = xmalloc (len);
  64   memcpy (buffer, myaddr, len);
  65   check_mem_write (memaddr, buffer, myaddr, len);
  66   res = (*the_target->write_memory) (memaddr, buffer, len);
  67   free (buffer);
  68   buffer = NULL;
  69
  70   return res;
  71 }
  72
  73 ptid_t
  74 mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
  75         int connected_wait)
  76 {
  77   ptid_t ret;
  78
  79   if (connected_wait)
  80     server_waiting = 1;
  81
  82   ret = (*the_target->wait) (ptid, ourstatus, options);
  83
  84   if (ourstatus->kind == TARGET_WAITKIND_EXITED)
  85     fprintf (stderr,
  86              "\nChild exited with status %d\n", ourstatus->value.integer);
  87   else if (ourstatus->kind == TARGET_WAITKIND_SIGNALLED)
  88     fprintf (stderr, "\nChild terminated with signal = 0x%x (%s)\n",
  89              gdb_signal_to_host (ourstatus->value.sig),
  90              gdb_signal_to_name (ourstatus->value.sig));
  91
  92   if (connected_wait)
  93     server_waiting = 0;
  94
  95   return ret;
  96 }
  97
  98 int
  99 start_non_stop (int nonstop)
 100 {
 101   if (the_target->start_non_stop == NULL)
 102     {
 103       if (nonstop)
 104         return -1;
 105       else
 106         return 0;
 107     }
 108
 109   return (*the_target->start_non_stop) (nonstop);
 110 }
 111
 112 void
 113 set_target_ops (struct target_ops *target)
 114 {
 115   the_target = (struct target_ops *) xmalloc (sizeof (*the_target));
 116   memcpy (the_target, target, sizeof (*the_target));
 117 }
 118
 119 /* Convert pid to printable format.  */
 120
 121 const char *
 122 target_pid_to_str (ptid_t ptid)
 123 {
 124   static char buf[80];
 125
 126   if (ptid_equal (ptid, minus_one_ptid))
 127     xsnprintf (buf, sizeof (buf), "<all threads>");
 128   else if (ptid_equal (ptid, null_ptid))
 129     xsnprintf (buf, sizeof (buf), "<null thread>");
 130   else if (ptid_get_tid (ptid) != 0)
 131     xsnprintf (buf, sizeof (buf), "Thread %d.0x%lx",
 132                ptid_get_pid (ptid), ptid_get_tid (ptid));
 133   else if (ptid_get_lwp (ptid) != 0)
 134     xsnprintf (buf, sizeof (buf), "LWP %d.%ld",
 135                ptid_get_pid (ptid), ptid_get_lwp (ptid));
 136   else
 137     xsnprintf (buf, sizeof (buf), "Process %d",
 138                ptid_get_pid (ptid));
 139
 140   return buf;
 141 }
 142
 143 /* Return a pretty printed form of target_waitstatus.  */
 144
 145 const char *
 146 target_waitstatus_to_string (const struct target_waitstatus *ws)
 147 {
 148   static char buf[200];
 149   const char *kind_str = "status->kind = ";
 150
 151   switch (ws->kind)
 152     {
 153     case TARGET_WAITKIND_EXITED:
 154       sprintf (buf, "%sexited, status = %d",
 155                kind_str, ws->value.integer);
 156       break;
 157     case TARGET_WAITKIND_STOPPED:
 158       sprintf (buf, "%sstopped, signal = %s",
 159                kind_str, gdb_signal_to_name (ws->value.sig));
 160       break;
 161     case TARGET_WAITKIND_SIGNALLED:
 162       sprintf (buf, "%ssignalled, signal = %s",
 163                kind_str, gdb_signal_to_name (ws->value.sig));
 164       break;
 165     case TARGET_WAITKIND_LOADED:
 166       sprintf (buf, "%sloaded", kind_str);
 167       break;
 168     case TARGET_WAITKIND_EXECD:
 169       sprintf (buf, "%sexecd", kind_str);
 170       break;
 171     case TARGET_WAITKIND_SPURIOUS:
 172       sprintf (buf, "%sspurious", kind_str);
 173       break;
 174     case TARGET_WAITKIND_IGNORE:
 175       sprintf (buf, "%signore", kind_str);
 176       break;
 177     default:
 178       sprintf (buf, "%sunknown???", kind_str);
 179       break;
 180     }
 181
 182   return buf;
 183 }
 184
 185 int
 186 kill_inferior (int pid)
 187 {
 188   gdb_agent_about_to_close (pid);
 189
 190   return (*the_target->kill) (pid);
 191 }