text: /* Very simple "bfd" target, for GDB, the GNU debugger.
  
     Copyright (C) 2003-2015 Free Software Foundation, Inc.
  
     This file is part of GDB.
  
     This program is free software; you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation; either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  
  #include "defs.h"
  #include "target.h"
  #include "bfd-target.h"
  #include "exec.h"
  #include "gdb_bfd.h"
  
  /* The object that is stored in the target_ops->to_data field has this
     type.  */
  struct target_bfd_data
  {
    /* The BFD we're wrapping.  */
    struct bfd *bfd;
  
    /* The section table build from the ALLOC sections in BFD.  Note
       that we can't rely on extracting the BFD from a random section in
       the table, since the table can be legitimately empty.  */
    struct target_section_table table;
  };
  
  static enum target_xfer_status
  target_bfd_xfer_partial (struct target_ops *ops,
  			 enum target_object object,
  			 const char *annex, gdb_byte *readbuf,
  			 const gdb_byte *writebuf,
  			 ULONGEST offset, ULONGEST len,
  			 ULONGEST *xfered_len)
  {
    switch (object)
      {
      case TARGET_OBJECT_MEMORY:
        {
  	struct target_bfd_data *data = ops->to_data;
  	return section_table_xfer_memory_partial (readbuf, writebuf,
  						  offset, len, xfered_len,
  						  data->table.sections,
  						  data->table.sections_end,
  						  NULL);
        }
      default:
        return TARGET_XFER_E_IO;
      }
  }
  
  static struct target_section_table *
  target_bfd_get_section_table (struct target_ops *ops)
  {
    struct target_bfd_data *data = ops->to_data;
    return &data->table;
  }
  
  static void
  target_bfd_xclose (struct target_ops *t)
  {
    struct target_bfd_data *data = t->to_data;
  
    gdb_bfd_unref (data->bfd);
    xfree (data->table.sections);
    xfree (data);
    xfree (t);
  }
  
  struct target_ops *
  target_bfd_reopen (struct bfd *abfd)
  {
    struct target_ops *t;
    struct target_bfd_data *data;
  
    data = XCNEW (struct target_bfd_data);
    data->bfd = abfd;
    gdb_bfd_ref (abfd);
    build_section_table (abfd, &data->table.sections, &data->table.sections_end);
  
    t = XCNEW (struct target_ops);
    t->to_shortname = "bfd";
    t->to_longname = _("BFD backed target");
    t->to_doc = _("You should never see this");
    t->to_get_section_table = target_bfd_get_section_table;
    t->to_xfer_partial = target_bfd_xfer_partial;
    t->to_xclose = target_bfd_xclose;
    t->to_data = data;
    t->to_magic = OPS_MAGIC;
  
    return t;
  }
  