| 1 | /* Very simple "bfd" target, for GDB, the GNU debugger. |
| 2 | |
| 3 | Copyright (C) 2003-2018 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 (struct bfd *bfd); |
| 38 | ~target_bfd () override; |
| 39 | |
| 40 | const target_info &info () const override |
| 41 | { return target_bfd_target_info; } |
| 42 | |
| 43 | strata stratum () const override { return file_stratum; } |
| 44 | |
| 45 | void close () override; |
| 46 | |
| 47 | target_xfer_status |
| 48 | xfer_partial (target_object object, |
| 49 | const char *annex, gdb_byte *readbuf, |
| 50 | const gdb_byte *writebuf, |
| 51 | ULONGEST offset, ULONGEST len, |
| 52 | ULONGEST *xfered_len) override; |
| 53 | |
| 54 | target_section_table *get_section_table () override; |
| 55 | |
| 56 | private: |
| 57 | /* The BFD we're wrapping. */ |
| 58 | gdb_bfd_ref_ptr m_bfd; |
| 59 | |
| 60 | /* The section table build from the ALLOC sections in BFD. Note |
| 61 | that we can't rely on extracting the BFD from a random section in |
| 62 | the table, since the table can be legitimately empty. */ |
| 63 | struct target_section_table m_table; |
| 64 | }; |
| 65 | |
| 66 | target_xfer_status |
| 67 | target_bfd::xfer_partial (target_object object, |
| 68 | const char *annex, gdb_byte *readbuf, |
| 69 | const gdb_byte *writebuf, |
| 70 | ULONGEST offset, ULONGEST len, |
| 71 | ULONGEST *xfered_len) |
| 72 | { |
| 73 | switch (object) |
| 74 | { |
| 75 | case TARGET_OBJECT_MEMORY: |
| 76 | { |
| 77 | return section_table_xfer_memory_partial (readbuf, writebuf, |
| 78 | offset, len, xfered_len, |
| 79 | m_table.sections, |
| 80 | m_table.sections_end, |
| 81 | NULL); |
| 82 | } |
| 83 | default: |
| 84 | return TARGET_XFER_E_IO; |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | target_section_table * |
| 89 | target_bfd::get_section_table () |
| 90 | { |
| 91 | return &m_table; |
| 92 | } |
| 93 | |
| 94 | target_bfd::target_bfd (struct bfd *abfd) |
| 95 | : m_bfd (gdb_bfd_ref_ptr::new_reference (abfd)) |
| 96 | { |
| 97 | m_table.sections = NULL; |
| 98 | m_table.sections_end = NULL; |
| 99 | build_section_table (abfd, &m_table.sections, &m_table.sections_end); |
| 100 | } |
| 101 | |
| 102 | target_bfd::~target_bfd () |
| 103 | { |
| 104 | xfree (m_table.sections); |
| 105 | } |
| 106 | |
| 107 | target_ops * |
| 108 | target_bfd_reopen (struct bfd *abfd) |
| 109 | { |
| 110 | return new target_bfd (abfd); |
| 111 | } |
| 112 | |
| 113 | void |
| 114 | target_bfd::close () |
| 115 | { |
| 116 | delete this; |
| 117 | } |