gdb/bfd-target.c - gdb

Data types defined

Functions defined

Source code

  1. /* Very simple "bfd" target, for GDB, the GNU debugger.

  3.    Copyright (C) 2003-2015 Free Software Foundation, Inc.

  5.    This file is part of GDB.

  7.    This program is free software; you can redistribute it and/or modify
  8.    it under the terms of the GNU General Public License as published by
  9.    the Free Software Foundation; either version 3 of the License, or
  10.    (at your option) any later version.

  12.    This program is distributed in the hope that it will be useful,
  13.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15.    GNU General Public License for more details.

  17.    You should have received a copy of the GNU General Public License
  18.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  20. #include "defs.h"
  21. #include "target.h"
  22. #include "bfd-target.h"
  23. #include "exec.h"
  24. #include "gdb_bfd.h"

  26. /* The object that is stored in the target_ops->to_data field has this
  27.    type.  */
  28. ‌struct target_bfd_data
  29. {
  30.   /* The BFD we're wrapping.  */
  31.   struct bfd *bfd;

  33.   /* The section table build from the ALLOC sections in BFD.  Note
  34.      that we can't rely on extracting the BFD from a random section in
  35.      the table, since the table can be legitimately empty.  */
  36.   struct target_section_table table;
  37. };

  39. static enum target_xfer_status
  40. ‌target_bfd_xfer_partial (struct target_ops *ops,
  41.                          enum target_object object,
  42.                          const char *annex, gdb_byte *readbuf,
  43.                          const gdb_byte *writebuf,
  44.                          ULONGEST offset, ULONGEST len,
  45.                          ULONGEST *xfered_len)
  46. {
  47.   switch (object)
  48.     {
  49.     case TARGET_OBJECT_MEMORY:
  50.       {
  51.         struct target_bfd_data *data = ops->to_data;
  52.         return section_table_xfer_memory_partial (readbuf, writebuf,
  53.                                                   offset, len, xfered_len,
  54.                                                   data->table.sections,
  55.                                                   data->table.sections_end,
  56.                                                   NULL);
  57.       }
  58.     default:
  59.       return TARGET_XFER_E_IO;
  60.     }
  61. }

  63. static struct target_section_table *
  64. ‌target_bfd_get_section_table (struct target_ops *ops)
  65. {
  66.   struct target_bfd_data *data = ops->to_data;
  67.   return &data->table;
  68. }

  70. static void
  71. ‌target_bfd_xclose (struct target_ops *t)
  72. {
  73.   struct target_bfd_data *data = t->to_data;

  75.   gdb_bfd_unref (data->bfd);
  76.   xfree (data->table.sections);
  77.   xfree (data);
  78.   xfree (t);
  79. }

  81. struct target_ops *
  82. ‌target_bfd_reopen (struct bfd *abfd)
  83. {
  84.   struct target_ops *t;
  85.   struct target_bfd_data *data;

  87.   data = XCNEW (struct target_bfd_data);
  88.   data->bfd = abfd;
  89.   gdb_bfd_ref (abfd);
  90.   build_section_table (abfd, &data->table.sections, &data->table.sections_end);

  92.   t = XCNEW (struct target_ops);
  93.   t->to_shortname = "bfd";
  94.   t->to_longname = _("BFD backed target");
  95.   t->to_doc = _("You should never see this");
  96.   t->to_get_section_table = target_bfd_get_section_table;
  97.   t->to_xfer_partial = target_bfd_xfer_partial;
  98.   t->to_xclose = target_bfd_xclose;
  99.   t->to_data = data;
  100.   t->to_magic = OPS_MAGIC;

  102.   return t;
  103. }