1 /* Very simple "bfd" target, for GDB, the GNU debugger. 2 3 Copyright (C) 2003-2016 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 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. 11 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. 16 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/>. */ 19 20 #include "defs.h" 21 #include "target.h" 22 #include "bfd-target.h" 23 #include "exec.h" 24 #include "gdb_bfd.h" 25 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; 32 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 }; 38 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 = (struct target_bfd_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 } 62 63 static struct target_section_table * 64 target_bfd_get_section_table (struct target_ops *ops) 65 { 66 struct target_bfd_data *data = (struct target_bfd_data *) ops->to_data; 67 return &data->table; 68 } 69 70 static void 71 target_bfd_xclose (struct target_ops *t) 72 { 73 struct target_bfd_data *data = (struct target_bfd_data *) t->to_data; 74 75 gdb_bfd_unref (data->bfd); 76 xfree (data->table.sections); 77 xfree (data); 78 xfree (t); 79 } 80 81 struct target_ops * 82 target_bfd_reopen (struct bfd *abfd) 83 { 84 struct target_ops *t; 85 struct target_bfd_data *data; 86 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); 91 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; 101 102 return t; 103 } 104