| 1 | /* Very simple "bfd" target, for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2003-2021 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 | /* A target that wraps a BFD. */ |
| 27 | |
| 28 | static const target_info target_bfd_target_info = { |
| 29 | "bfd", |
| 30 | N_("BFD backed target"), |
| 31 | N_("You should never see this") |
| 32 | }; |
| 33 | |
| 34 | class target_bfd : public target_ops |
| 35 | { |
| 36 | public: |
| 37 | explicit target_bfd (const gdb_bfd_ref_ptr &bfd); |
| 38 | |
| 39 | const target_info &info () const override |
| 40 | { return target_bfd_target_info; } |
| 41 | |
| 42 | strata stratum () const override { return file_stratum; } |
| 43 | |
| 44 | void close () override; |
| 45 | |
| 46 | target_xfer_status |
| 47 | xfer_partial (target_object object, |
| 48 | const char *annex, gdb_byte *readbuf, |
| 49 | const gdb_byte *writebuf, |
| 50 | ULONGEST offset, ULONGEST len, |
| 51 | ULONGEST *xfered_len) override; |
| 52 | |
| 53 | const target_section_table *get_section_table () override; |
| 54 | |
| 55 | private: |
| 56 | /* The BFD we're wrapping. */ |
| 57 | gdb_bfd_ref_ptr m_bfd; |
| 58 | |
| 59 | /* The section table build from the ALLOC sections in BFD. Note |
| 60 | that we can't rely on extracting the BFD from a random section in |
| 61 | the table, since the table can be legitimately empty. */ |
| 62 | target_section_table m_table; |
| 63 | }; |
| 64 | |
| 65 | target_xfer_status |
| 66 | target_bfd::xfer_partial (target_object object, |
| 67 | const char *annex, gdb_byte *readbuf, |
| 68 | const gdb_byte *writebuf, |
| 69 | ULONGEST offset, ULONGEST len, |
| 70 | ULONGEST *xfered_len) |
| 71 | { |
| 72 | switch (object) |
| 73 | { |
| 74 | case TARGET_OBJECT_MEMORY: |
| 75 | { |
| 76 | return section_table_xfer_memory_partial (readbuf, writebuf, |
| 77 | offset, len, xfered_len, |
| 78 | m_table); |
| 79 | } |
| 80 | default: |
| 81 | return TARGET_XFER_E_IO; |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | const target_section_table * |
| 86 | target_bfd::get_section_table () |
| 87 | { |
| 88 | return &m_table; |
| 89 | } |
| 90 | |
| 91 | target_bfd::target_bfd (const gdb_bfd_ref_ptr &abfd) |
| 92 | : m_bfd (abfd), |
| 93 | m_table (build_section_table (abfd.get ())) |
| 94 | { |
| 95 | } |
| 96 | |
| 97 | target_ops * |
| 98 | target_bfd_reopen (const gdb_bfd_ref_ptr &abfd) |
| 99 | { |
| 100 | return new target_bfd (abfd); |
| 101 | } |
| 102 | |
| 103 | void |
| 104 | target_bfd::close () |
| 105 | { |
| 106 | delete this; |
| 107 | } |