1 /* Definitions for BFD wrappers used by GDB.
3 Copyright (C) 2011-2020 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/>. */
24 #include "gdbsupport/byte-vector.h"
25 #include "gdbsupport/gdb_ref_ptr.h"
27 DECLARE_REGISTRY (bfd
);
29 /* If supplied a path starting with this sequence, gdb_bfd_open will
30 open BFDs using target fileio operations. */
32 #define TARGET_SYSROOT_PREFIX "target:"
34 /* Returns nonzero if NAME starts with TARGET_SYSROOT_PREFIX, zero
37 int is_target_filename (const char *name
);
39 /* Returns nonzero if the filename associated with ABFD starts with
40 TARGET_SYSROOT_PREFIX, zero otherwise. */
42 int gdb_bfd_has_target_filename (struct bfd
*abfd
);
44 /* Increment the reference count of ABFD. It is fine for ABFD to be
45 NULL; in this case the function does nothing. */
47 void gdb_bfd_ref (struct bfd
*abfd
);
49 /* Decrement the reference count of ABFD. If this is the last
50 reference, ABFD will be freed. If ABFD is NULL, this function does
53 void gdb_bfd_unref (struct bfd
*abfd
);
55 /* A policy class for gdb::ref_ptr for BFD reference counting. */
56 struct gdb_bfd_ref_policy
58 static void incref (struct bfd
*abfd
)
63 static void decref (struct bfd
*abfd
)
69 /* A gdb::ref_ptr that has been specialized for BFD objects. */
70 typedef gdb::ref_ptr
<struct bfd
, gdb_bfd_ref_policy
> gdb_bfd_ref_ptr
;
72 /* Open a read-only (FOPEN_RB) BFD given arguments like bfd_fopen.
73 If NAME starts with TARGET_SYSROOT_PREFIX then the BFD will be
74 opened using target fileio operations if necessary. Returns NULL
75 on error. On success, returns a new reference to the BFD. BFDs
76 returned by this call are shared among all callers opening the same
77 file. If FD is not -1, then after this call it is owned by BFD.
78 If the BFD was not accessed using target fileio operations then the
79 filename associated with the BFD and accessible with
80 bfd_get_filename will not be exactly NAME but rather NAME with
81 TARGET_SYSROOT_PREFIX stripped. */
83 gdb_bfd_ref_ptr
gdb_bfd_open (const char *name
, const char *target
, int fd
);
85 /* Mark the CHILD BFD as being a member of PARENT. Also, increment
86 the reference count of CHILD. Calling this function ensures that
87 as along as CHILD remains alive, PARENT will as well. Both CHILD
88 and PARENT must be non-NULL. This can be called more than once
89 with the same arguments; but it is not allowed to call it for a
90 single CHILD with different values for PARENT. */
92 void gdb_bfd_mark_parent (bfd
*child
, bfd
*parent
);
94 /* Mark INCLUDEE as being included by INCLUDER.
95 This is used to associate the life time of INCLUDEE with INCLUDER.
96 For example, with Fission, one file can refer to debug info in another
97 file, and internal tables we build for the main file (INCLUDER) may refer
98 to data contained in INCLUDEE. Therefore we want to keep INCLUDEE around
99 at least as long as INCLUDER exists.
101 Note that this is different than gdb_bfd_mark_parent because in our case
102 lifetime tracking is based on the "parent" whereas in gdb_bfd_mark_parent
103 lifetime tracking is based on the "child". Plus in our case INCLUDEE could
104 have multiple different "parents". */
106 void gdb_bfd_record_inclusion (bfd
*includer
, bfd
*includee
);
108 /* Try to read or map the contents of the section SECT. If successful, the
109 section data is returned and *SIZE is set to the size of the section data;
110 this may not be the same as the size according to bfd_section_size if the
111 section was compressed. The returned section data is associated with the BFD
112 and will be destroyed when the BFD is destroyed. There is no other way to
113 free it; for temporary uses of section data, see bfd_malloc_and_get_section.
114 SECT may not have relocations. If there is an error reading the section,
115 this issues a warning, sets *SIZE to 0, and returns NULL. */
117 const gdb_byte
*gdb_bfd_map_section (asection
*section
, bfd_size_type
*size
);
119 /* Compute the CRC for ABFD. The CRC is used to find and verify
120 separate debug files. When successful, this fills in *CRC_OUT and
121 returns 1. Otherwise, this issues a warning and returns 0. */
123 int gdb_bfd_crc (struct bfd
*abfd
, unsigned long *crc_out
);
127 /* A wrapper for bfd_fopen that initializes the gdb-specific reference
130 gdb_bfd_ref_ptr
gdb_bfd_fopen (const char *, const char *, const char *, int);
132 /* A wrapper for bfd_openr that initializes the gdb-specific reference
135 gdb_bfd_ref_ptr
gdb_bfd_openr (const char *, const char *);
137 /* A wrapper for bfd_openw that initializes the gdb-specific reference
140 gdb_bfd_ref_ptr
gdb_bfd_openw (const char *, const char *);
142 /* A wrapper for bfd_openr_iovec that initializes the gdb-specific
145 gdb_bfd_ref_ptr
gdb_bfd_openr_iovec (const char *filename
, const char *target
,
146 void *(*open_func
) (struct bfd
*nbfd
,
149 file_ptr (*pread_func
) (struct bfd
*nbfd
,
154 int (*close_func
) (struct bfd
*nbfd
,
156 int (*stat_func
) (struct bfd
*abfd
,
160 /* A wrapper for bfd_openr_next_archived_file that initializes the
161 gdb-specific reference count. */
163 gdb_bfd_ref_ptr
gdb_bfd_openr_next_archived_file (bfd
*archive
, bfd
*previous
);
168 /* Return the index of the BFD section SECTION. Ordinarily this is
169 just the section's index, but for some special sections, like
170 bfd_com_section_ptr, it will be a synthesized value. */
172 int gdb_bfd_section_index (bfd
*abfd
, asection
*section
);
175 /* Like bfd_count_sections, but include any possible global sections,
176 like bfd_com_section_ptr. */
178 int gdb_bfd_count_sections (bfd
*abfd
);
180 /* Return true if any section requires relocations, false
183 int gdb_bfd_requires_relocations (bfd
*abfd
);
185 /* Alternative to bfd_get_full_section_contents that returns the section
186 contents in *CONTENTS, instead of an allocated buffer.
188 Return true on success, false otherwise. */
190 bool gdb_bfd_get_full_section_contents (bfd
*abfd
, asection
*section
,
191 gdb::byte_vector
*contents
);
193 #endif /* GDB_BFD_H */
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