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/tmp/gdb-8.1/gdb/bfd-target.c
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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 /* 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 }
target_ops::to_longname
const char * to_longname
Definition: target.h:416
xfree
void xfree(void *)
target_section_table::sections_end
struct target_section * sections_end
Definition: target.h:2335
target_ops::to_xclose
void(* to_xclose)(struct target_ops *targ)
Definition: target.h:430
build_section_table
int build_section_table(struct bfd *some_bfd, struct target_section **start, struct target_section **end)
Definition: exec.c:509
_
#define _(String)
Definition: gdb_locale.h:35
gdb_bfd.h
target_bfd_data::table
struct target_section_table table
Definition: bfd-target.c:36
defs.h
section_table_xfer_memory_partial
enum target_xfer_status section_table_xfer_memory_partial(gdb_byte *readbuf, const gdb_byte *writebuf, ULONGEST offset, ULONGEST len, ULONGEST *xfered_len, struct target_section *sections, struct target_section *sections_end, const char *section_name)
Definition: exec.c:776
target_bfd_data::bfd
struct bfd * bfd
Definition: bfd-target.c:31
gdb_bfd_ref
void gdb_bfd_ref(struct bfd *abfd)
Definition: gdb_bfd.c:523
OPS_MAGIC
#define OPS_MAGIC
Definition: target.h:1270
target_ops::to_data
void * to_data
Definition: target.h:421
gdb_bfd_unref
void gdb_bfd_unref(struct bfd *abfd)
Definition: gdb_bfd.c:561
target_ops
Definition: target.h:412
target_bfd_get_section_table
static struct target_section_table * target_bfd_get_section_table(struct target_ops *ops)
Definition: bfd-target.c:64
TARGET_OBJECT_MEMORY
Definition: target.h:139
target_bfd_reopen
struct target_ops * target_bfd_reopen(struct bfd *abfd)
Definition: bfd-target.c:82
target_ops::to_get_section_table
struct target_section_table *(* to_get_section_table)(struct target_ops *) TARGET_DEFAULT_RETURN(NULL)
Definition: target.h:654
target_section_table::sections
struct target_section * sections
Definition: target.h:2334
target_xfer_status
target_xfer_status
Definition: target.h:206
target_bfd_xclose
static void target_bfd_xclose(struct target_ops *t)
Definition: bfd-target.c:71
target_ops::to_doc
const char * to_doc
Definition: target.h:417
target_ops::to_xfer_partial
enum target_xfer_status(* to_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) TARGET_DEFAULT_RETURN(TARGET_XFER_E_IO)
Definition: target.h:739
target_section_table
Definition: target.h:2332
target_object
target_object
Definition: target.h:132
target_bfd_xfer_partial
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)
Definition: bfd-target.c:40
target_bfd_data
Definition: bfd-target.c:28
gdb_byte
bfd_byte gdb_byte
Definition: common-types.h:38
XCNEW
#define XCNEW(T)
Definition: poison.h:121
exec.h
offset
int offset
Definition: agent.c:65
target.h
target_ops::to_shortname
const char * to_shortname
Definition: target.h:415
ULONGEST
unsigned long long ULONGEST
Definition: common-types.h:53
target_ops::to_magic
int to_magic
Definition: target.h:1261
bfd-target.h
TARGET_XFER_E_IO
Definition: target.h:220