gdb/gdbserver/target.c

   1 /* Target operations for the remote server for GDB.
   2    Copyright (C) 2002, 2004, 2005, 2007, 2008, 2009, 2010, 2011
   3    Free Software Foundation, Inc.
   4
   5    Contributed by MontaVista Software.
   6
   7    This file is part of GDB.
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 3 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  21
  22 #include "server.h"
  23
  24 struct target_ops *the_target;
  25
  26 void
  27 set_desired_inferior (int use_general)
  28 {
  29   struct thread_info *found;
  30
  31   if (use_general == 1)
  32     found = find_thread_ptid (general_thread);
  33   else
  34     found = find_thread_ptid (cont_thread);
  35
  36   if (found == NULL)
  37     current_inferior = (struct thread_info *) all_threads.head;
  38   else
  39     current_inferior = found;
  40 }
  41
  42 int
  43 read_inferior_memory (CORE_ADDR memaddr, unsigned char *myaddr, int len)
  44 {
  45   int res;
  46   res = (*the_target->read_memory) (memaddr, myaddr, len);
  47   check_mem_read (memaddr, myaddr, len);
  48   return res;
  49 }
  50
  51 int
  52 write_inferior_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
  53                        int len)
  54 {
  55   /* Lacking cleanups, there is some potential for a memory leak if the
  56      write fails and we go through error().  Make sure that no more than
  57      one buffer is ever pending by making BUFFER static.  */
  58   static unsigned char *buffer = 0;
  59   int res;
  60
  61   if (buffer != NULL)
  62     free (buffer);
  63
  64   buffer = xmalloc (len);
  65   memcpy (buffer, myaddr, len);
  66   check_mem_write (memaddr, buffer, len);
  67   res = (*the_target->write_memory) (memaddr, buffer, len);
  68   free (buffer);
  69   buffer = NULL;
  70
  71   return res;
  72 }
  73
  74 ptid_t
  75 mywait (ptid_t ptid, struct target_waitstatus *ourstatus, int options,
  76         int connected_wait)
  77 {
  78   ptid_t ret;
  79
  80   if (connected_wait)
  81     server_waiting = 1;
  82
  83   ret = (*the_target->wait) (ptid, ourstatus, options);
  84
  85   if (ourstatus->kind == TARGET_WAITKIND_EXITED)
  86     fprintf (stderr,
  87              "\nChild exited with status %d\n", ourstatus->value.integer);
  88   else if (ourstatus->kind == TARGET_WAITKIND_SIGNALLED)
  89     fprintf (stderr, "\nChild terminated with signal = 0x%x (%s)\n",
  90              target_signal_to_host (ourstatus->value.sig),
  91              target_signal_to_name (ourstatus->value.sig));
  92
  93   if (connected_wait)
  94     server_waiting = 0;
  95
  96   return ret;
  97 }
  98
  99 int
 100 start_non_stop (int nonstop)
 101 {
 102   if (the_target->start_non_stop == NULL)
 103     {
 104       if (nonstop)
 105         return -1;
 106       else
 107         return 0;
 108     }
 109
 110   return (*the_target->start_non_stop) (nonstop);
 111 }
 112
 113 void
 114 set_target_ops (struct target_ops *target)
 115 {
 116   the_target = (struct target_ops *) xmalloc (sizeof (*the_target));
 117   memcpy (the_target, target, sizeof (*the_target));
 118 }
 119
 120 /* Convert pid to printable format.  */
 121
 122 const char *
 123 target_pid_to_str (ptid_t ptid)
 124 {
 125   static char buf[80];
 126
 127   if (ptid_equal (ptid, minus_one_ptid))
 128     xsnprintf (buf, sizeof (buf), "<all threads>");
 129   else if (ptid_equal (ptid, null_ptid))
 130     xsnprintf (buf, sizeof (buf), "<null thread>");
 131   else if (ptid_get_tid (ptid) != 0)
 132     xsnprintf (buf, sizeof (buf), "Thread %d.0x%lx",
 133                ptid_get_pid (ptid), ptid_get_tid (ptid));
 134   else if (ptid_get_lwp (ptid) != 0)
 135     xsnprintf (buf, sizeof (buf), "LWP %d.%ld",
 136                ptid_get_pid (ptid), ptid_get_lwp (ptid));
 137   else
 138     xsnprintf (buf, sizeof (buf), "Process %d",
 139                ptid_get_pid (ptid));
 140
 141   return buf;
 142 }
 143
 144 /* Return a pretty printed form of target_waitstatus.  */
 145
 146 const char *
 147 target_waitstatus_to_string (const struct target_waitstatus *ws)
 148 {
 149   static char buf[200];
 150   const char *kind_str = "status->kind = ";
 151
 152   switch (ws->kind)
 153     {
 154     case TARGET_WAITKIND_EXITED:
 155       sprintf (buf, "%sexited, status = %d",
 156                kind_str, ws->value.integer);
 157       break;
 158     case TARGET_WAITKIND_STOPPED:
 159       sprintf (buf, "%sstopped, signal = %s",
 160                kind_str, target_signal_to_name (ws->value.sig));
 161       break;
 162     case TARGET_WAITKIND_SIGNALLED:
 163       sprintf (buf, "%ssignalled, signal = %s",
 164                kind_str, target_signal_to_name (ws->value.sig));
 165       break;
 166     case TARGET_WAITKIND_LOADED:
 167       sprintf (buf, "%sloaded", kind_str);
 168       break;
 169     case TARGET_WAITKIND_EXECD:
 170       sprintf (buf, "%sexecd", kind_str);
 171       break;
 172     case TARGET_WAITKIND_SPURIOUS:
 173       sprintf (buf, "%sspurious", kind_str);
 174       break;
 175     case TARGET_WAITKIND_IGNORE:
 176       sprintf (buf, "%signore", kind_str);
 177       break;
 178     default:
 179       sprintf (buf, "%sunknown???", kind_str);
 180       break;
 181     }
 182
 183   return buf;
 184 }