1 /* Definitions for BFD wrappers used by GDB.
3 Copyright (C) 2011-2018 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 "common/gdb_ref_ptr.h"
26 DECLARE_REGISTRY (bfd
);
28 /* If supplied a path starting with this sequence, gdb_bfd_open will
29 open BFDs using target fileio operations. */
31 #define TARGET_SYSROOT_PREFIX "target:"
33 /* Returns nonzero if NAME starts with TARGET_SYSROOT_PREFIX, zero
36 int is_target_filename (const char *name
);
38 /* Returns nonzero if the filename associated with ABFD starts with
39 TARGET_SYSROOT_PREFIX, zero otherwise. */
41 int gdb_bfd_has_target_filename (struct bfd
*abfd
);
43 /* Increment the reference count of ABFD. It is fine for ABFD to be
44 NULL; in this case the function does nothing. */
46 void gdb_bfd_ref (struct bfd
*abfd
);
48 /* Decrement the reference count of ABFD. If this is the last
49 reference, ABFD will be freed. If ABFD is NULL, this function does
52 void gdb_bfd_unref (struct bfd
*abfd
);
54 /* A policy class for gdb::ref_ptr for BFD reference counting. */
55 struct gdb_bfd_ref_policy
57 static void incref (struct bfd
*abfd
)
62 static void decref (struct bfd
*abfd
)
68 /* A gdb::ref_ptr that has been specialized for BFD objects. */
69 typedef gdb::ref_ptr
<struct bfd
, gdb_bfd_ref_policy
> gdb_bfd_ref_ptr
;
71 /* A helper function that calls gdb_bfd_ref and returns a
74 static inline gdb_bfd_ref_ptr
75 new_bfd_ref (struct bfd
*abfd
)
78 return gdb_bfd_ref_ptr (abfd
);
81 /* Open a read-only (FOPEN_RB) BFD given arguments like bfd_fopen.
82 If NAME starts with TARGET_SYSROOT_PREFIX then the BFD will be
83 opened using target fileio operations if necessary. Returns NULL
84 on error. On success, returns a new reference to the BFD, which
85 must be freed with gdb_bfd_unref. BFDs returned by this call are
86 shared among all callers opening the same file. If FD is not -1,
87 then after this call it is owned by BFD. If the BFD was not
88 accessed using target fileio operations then the filename
89 associated with the BFD and accessible with bfd_get_filename will
90 not be exactly NAME but rather NAME with TARGET_SYSROOT_PREFIX
93 gdb_bfd_ref_ptr
gdb_bfd_open (const char *name
, const char *target
, int fd
);
95 /* Mark the CHILD BFD as being a member of PARENT. Also, increment
96 the reference count of CHILD. Calling this function ensures that
97 as along as CHILD remains alive, PARENT will as well. Both CHILD
98 and PARENT must be non-NULL. This can be called more than once
99 with the same arguments; but it is not allowed to call it for a
100 single CHILD with different values for PARENT. */
102 void gdb_bfd_mark_parent (bfd
*child
, bfd
*parent
);
104 /* Mark INCLUDEE as being included by INCLUDER.
105 This is used to associate the life time of INCLUDEE with INCLUDER.
106 For example, with Fission, one file can refer to debug info in another
107 file, and internal tables we build for the main file (INCLUDER) may refer
108 to data contained in INCLUDEE. Therefore we want to keep INCLUDEE around
109 at least as long as INCLUDER exists.
111 Note that this is different than gdb_bfd_mark_parent because in our case
112 lifetime tracking is based on the "parent" whereas in gdb_bfd_mark_parent
113 lifetime tracking is based on the "child". Plus in our case INCLUDEE could
114 have multiple different "parents". */
116 void gdb_bfd_record_inclusion (bfd
*includer
, bfd
*includee
);
118 /* Try to read or map the contents of the section SECT. If successful, the
119 section data is returned and *SIZE is set to the size of the section data;
120 this may not be the same as the size according to bfd_get_section_size if the
121 section was compressed. The returned section data is associated with the BFD
122 and will be destroyed when the BFD is destroyed. There is no other way to
123 free it; for temporary uses of section data, see bfd_malloc_and_get_section.
124 SECT may not have relocations. If there is an error reading the section,
125 this issues a warning, sets *SIZE to 0, and returns NULL. */
127 const gdb_byte
*gdb_bfd_map_section (asection
*section
, bfd_size_type
*size
);
129 /* Compute the CRC for ABFD. The CRC is used to find and verify
130 separate debug files. When successful, this fills in *CRC_OUT and
131 returns 1. Otherwise, this issues a warning and returns 0. */
133 int gdb_bfd_crc (struct bfd
*abfd
, unsigned long *crc_out
);
137 /* A wrapper for bfd_fopen that initializes the gdb-specific reference
140 gdb_bfd_ref_ptr
gdb_bfd_fopen (const char *, const char *, const char *, int);
142 /* A wrapper for bfd_openr that initializes the gdb-specific reference
145 gdb_bfd_ref_ptr
gdb_bfd_openr (const char *, const char *);
147 /* A wrapper for bfd_openw that initializes the gdb-specific reference
150 gdb_bfd_ref_ptr
gdb_bfd_openw (const char *, const char *);
152 /* A wrapper for bfd_openr_iovec that initializes the gdb-specific
155 gdb_bfd_ref_ptr
gdb_bfd_openr_iovec (const char *filename
, const char *target
,
156 void *(*open_func
) (struct bfd
*nbfd
,
159 file_ptr (*pread_func
) (struct bfd
*nbfd
,
164 int (*close_func
) (struct bfd
*nbfd
,
166 int (*stat_func
) (struct bfd
*abfd
,
170 /* A wrapper for bfd_openr_next_archived_file that initializes the
171 gdb-specific reference count. */
173 gdb_bfd_ref_ptr
gdb_bfd_openr_next_archived_file (bfd
*archive
, bfd
*previous
);
175 /* A wrapper for bfd_fdopenr that initializes the gdb-specific
178 gdb_bfd_ref_ptr
gdb_bfd_fdopenr (const char *filename
, const char *target
,
183 /* Return the index of the BFD section SECTION. Ordinarily this is
184 just the section's index, but for some special sections, like
185 bfd_com_section_ptr, it will be a synthesized value. */
187 int gdb_bfd_section_index (bfd
*abfd
, asection
*section
);
190 /* Like bfd_count_sections, but include any possible global sections,
191 like bfd_com_section_ptr. */
193 int gdb_bfd_count_sections (bfd
*abfd
);
195 /* Return true if any section requires relocations, false
198 int gdb_bfd_requires_relocations (bfd
*abfd
);
200 #endif /* GDB_BFD_H */
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