gdb/gdb_bfd.h

   1 /* Definitions for BFD wrappers used by GDB.
   2
   3    Copyright (C) 2011, 2012
   4    Free Software Foundation, Inc.
   5
   6    This file is part of GDB.
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef GDB_BFD_H
  22 #define GDB_BFD_H
  23
  24 #include "registry.h"
  25
  26 DECLARE_REGISTRY (bfd);
  27
  28 /* Make a copy ABFD's filename using bfd_alloc, and reassign it to the
  29    BFD.  This ensures that the BFD's filename has the same lifetime as
  30    the BFD itself.  */
  31
  32 void gdb_bfd_stash_filename (struct bfd *abfd);
  33
  34 /* Open a read-only (FOPEN_RB) BFD given arguments like bfd_fopen.
  35    Returns NULL on error.  On success, returns a new reference to the
  36    BFD, which must be freed with gdb_bfd_unref.  BFDs returned by this
  37    call are shared among all callers opening the same file.  If FD is
  38    not -1, then after this call it is owned by BFD.  */
  39
  40 struct bfd *gdb_bfd_open (const char *name, const char *target, int fd);
  41
  42 /* Increment the reference count of ABFD.  It is fine for ABFD to be
  43    NULL; in this case the function does nothing.  */
  44
  45 void gdb_bfd_ref (struct bfd *abfd);
  46
  47 /* Decrement the reference count of ABFD.  If this is the last
  48    reference, ABFD will be freed.  If ABFD is NULL, this function does
  49    nothing.  */
  50
  51 void gdb_bfd_unref (struct bfd *abfd);
  52
  53 /* Mark the CHILD BFD as being a member of PARENT.  Also, increment
  54    the reference count of CHILD.  Calling this function ensures that
  55    as along as CHILD remains alive, PARENT will as well.  Both CHILD
  56    and PARENT must be non-NULL.  This can be called more than once
  57    with the same arguments; but it is not allowed to call it for a
  58    single CHILD with different values for PARENT.  */
  59
  60 void gdb_bfd_mark_parent (bfd *child, bfd *parent);
  61
  62 /* Try to read or map the contents of the section SECT.  If
  63    successful, the section data is returned and *SIZE is set to the
  64    size of the section data; this may not be the same as the size
  65    according to bfd_get_section_size if the section was compressed.
  66    The returned section data is associated with the BFD and will be
  67    destroyed when the BFD is destroyed.  There is no other way to free
  68    it; for temporary uses of section data, see
  69    bfd_malloc_and_get_section.  SECT may not have relocations.  This
  70    function will throw on error.  */
  71
  72 const gdb_byte *gdb_bfd_map_section (asection *section, bfd_size_type *size);
  73
  74 \f
  75
  76 /* A wrapper for bfd_fopen that initializes the gdb-specific reference
  77    count and calls gdb_bfd_stash_filename.  */
  78
  79 bfd *gdb_bfd_fopen (const char *, const char *, const char *, int);
  80
  81 /* A wrapper for bfd_openr that initializes the gdb-specific reference
  82    count and calls gdb_bfd_stash_filename.  */
  83
  84 bfd *gdb_bfd_openr (const char *, const char *);
  85
  86 /* A wrapper for bfd_openw that initializes the gdb-specific reference
  87    count and calls gdb_bfd_stash_filename.  */
  88
  89 bfd *gdb_bfd_openw (const char *, const char *);
  90
  91 /* A wrapper for bfd_openr_iovec that initializes the gdb-specific
  92    reference count and calls gdb_bfd_stash_filename.  */
  93
  94 bfd *gdb_bfd_openr_iovec (const char *filename, const char *target,
  95                           void *(*open_func) (struct bfd *nbfd,
  96                                               void *open_closure),
  97                           void *open_closure,
  98                           file_ptr (*pread_func) (struct bfd *nbfd,
  99                                                   void *stream,
 100                                                   void *buf,
 101                                                   file_ptr nbytes,
 102                                                   file_ptr offset),
 103                           int (*close_func) (struct bfd *nbfd,
 104                                              void *stream),
 105                           int (*stat_func) (struct bfd *abfd,
 106                                             void *stream,
 107                                             struct stat *sb));
 108
 109 /* A wrapper for bfd_openr_next_archived_file that initializes the
 110    gdb-specific reference count and calls gdb_bfd_stash_filename.  */
 111
 112 bfd *gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous);
 113
 114 /* A wrapper for bfd_fdopenr that initializes the gdb-specific
 115    reference count and calls gdb_bfd_stash_filename.  */
 116
 117 bfd *gdb_bfd_fdopenr (const char *filename, const char *target, int fd);
 118
 119 #endif /* GDB_BFD_H */