gdb/gdbserver/target.c

   1 /* Target operations for the remote server for GDB.
   2    Copyright 2002, 2004
   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 2 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, write to the Free Software
  21    Foundation, Inc., 59 Temple Place - Suite 330,
  22    Boston, MA 02111-1307, USA.  */
  23
  24 #include "server.h"
  25
  26 struct target_ops *the_target;
  27
  28 void
  29 set_desired_inferior (int use_general)
  30 {
  31   struct thread_info *found;
  32
  33   if (use_general == 1)
  34     {
  35       found = (struct thread_info *) find_inferior_id (&all_threads,
  36                                                        general_thread);
  37     }
  38   else
  39     {
  40       found = NULL;
  41
  42       /* If we are continuing any (all) thread(s), use step_thread
  43          to decide which thread to step and/or send the specified
  44          signal to.  */
  45       if (step_thread > 0 && (cont_thread == 0 || cont_thread == -1))
  46         found = (struct thread_info *) find_inferior_id (&all_threads,
  47                                                          step_thread);
  48
  49       if (found == NULL)
  50         found = (struct thread_info *) find_inferior_id (&all_threads,
  51                                                          cont_thread);
  52     }
  53
  54   if (found == NULL)
  55     current_inferior = (struct thread_info *) all_threads.head;
  56   else
  57     current_inferior = found;
  58 }
  59
  60 int
  61 read_inferior_memory (CORE_ADDR memaddr, char *myaddr, int len)
  62 {
  63   int res;
  64   res = (*the_target->read_memory) (memaddr, myaddr, len);
  65   check_mem_read (memaddr, myaddr, len);
  66   return res;
  67 }
  68
  69 int
  70 write_inferior_memory (CORE_ADDR memaddr, const char *myaddr, int len)
  71 {
  72   /* Lacking cleanups, there is some potential for a memory leak if the
  73      write fails and we go through error().  Make sure that no more than
  74      one buffer is ever pending by making BUFFER static.  */
  75   static char *buffer = 0;
  76   int res;
  77
  78   if (buffer != NULL)
  79     free (buffer);
  80
  81   buffer = malloc (len);
  82   memcpy (buffer, myaddr, len);
  83   check_mem_write (memaddr, buffer, len);
  84   res = (*the_target->write_memory) (memaddr, buffer, len);
  85   free (buffer);
  86   buffer = NULL;
  87
  88   return res;
  89 }
  90
  91 unsigned char
  92 mywait (char *statusp, int connected_wait)
  93 {
  94   unsigned char ret;
  95
  96   if (connected_wait)
  97     server_waiting = 1;
  98
  99   ret = (*the_target->wait) (statusp);
 100
 101   if (connected_wait)
 102     server_waiting = 0;
 103
 104   return ret;
 105 }
 106
 107 void
 108 set_target_ops (struct target_ops *target)
 109 {
 110   the_target = (struct target_ops *) malloc (sizeof (*the_target));
 111   memcpy (the_target, target, sizeof (*the_target));
 112 }