185 lines
6.6 KiB
C
185 lines
6.6 KiB
C
/* Definitions for BFD wrappers used by GDB.
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Copyright (C) 2011-2020 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef GDB_BFD_H
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#define GDB_BFD_H
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#include "registry.h"
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#include "gdbsupport/gdb_ref_ptr.h"
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DECLARE_REGISTRY (bfd);
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/* If supplied a path starting with this sequence, gdb_bfd_open will
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open BFDs using target fileio operations. */
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#define TARGET_SYSROOT_PREFIX "target:"
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/* Returns nonzero if NAME starts with TARGET_SYSROOT_PREFIX, zero
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otherwise. */
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int is_target_filename (const char *name);
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/* Returns nonzero if the filename associated with ABFD starts with
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TARGET_SYSROOT_PREFIX, zero otherwise. */
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int gdb_bfd_has_target_filename (struct bfd *abfd);
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/* Increment the reference count of ABFD. It is fine for ABFD to be
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NULL; in this case the function does nothing. */
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void gdb_bfd_ref (struct bfd *abfd);
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/* Decrement the reference count of ABFD. If this is the last
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reference, ABFD will be freed. If ABFD is NULL, this function does
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nothing. */
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void gdb_bfd_unref (struct bfd *abfd);
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/* A policy class for gdb::ref_ptr for BFD reference counting. */
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struct gdb_bfd_ref_policy
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{
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static void incref (struct bfd *abfd)
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{
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gdb_bfd_ref (abfd);
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}
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static void decref (struct bfd *abfd)
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{
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gdb_bfd_unref (abfd);
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}
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};
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/* A gdb::ref_ptr that has been specialized for BFD objects. */
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typedef gdb::ref_ptr<struct bfd, gdb_bfd_ref_policy> gdb_bfd_ref_ptr;
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/* Open a read-only (FOPEN_RB) BFD given arguments like bfd_fopen.
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If NAME starts with TARGET_SYSROOT_PREFIX then the BFD will be
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opened using target fileio operations if necessary. Returns NULL
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on error. On success, returns a new reference to the BFD. BFDs
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returned by this call are shared among all callers opening the same
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file. If FD is not -1, then after this call it is owned by BFD.
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If the BFD was not accessed using target fileio operations then the
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filename associated with the BFD and accessible with
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bfd_get_filename will not be exactly NAME but rather NAME with
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TARGET_SYSROOT_PREFIX stripped. */
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gdb_bfd_ref_ptr gdb_bfd_open (const char *name, const char *target, int fd);
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/* Mark the CHILD BFD as being a member of PARENT. Also, increment
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the reference count of CHILD. Calling this function ensures that
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as along as CHILD remains alive, PARENT will as well. Both CHILD
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and PARENT must be non-NULL. This can be called more than once
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with the same arguments; but it is not allowed to call it for a
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single CHILD with different values for PARENT. */
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void gdb_bfd_mark_parent (bfd *child, bfd *parent);
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/* Mark INCLUDEE as being included by INCLUDER.
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This is used to associate the life time of INCLUDEE with INCLUDER.
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For example, with Fission, one file can refer to debug info in another
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file, and internal tables we build for the main file (INCLUDER) may refer
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to data contained in INCLUDEE. Therefore we want to keep INCLUDEE around
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at least as long as INCLUDER exists.
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Note that this is different than gdb_bfd_mark_parent because in our case
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lifetime tracking is based on the "parent" whereas in gdb_bfd_mark_parent
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lifetime tracking is based on the "child". Plus in our case INCLUDEE could
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have multiple different "parents". */
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void gdb_bfd_record_inclusion (bfd *includer, bfd *includee);
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/* Try to read or map the contents of the section SECT. If successful, the
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section data is returned and *SIZE is set to the size of the section data;
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this may not be the same as the size according to bfd_section_size if the
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section was compressed. The returned section data is associated with the BFD
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and will be destroyed when the BFD is destroyed. There is no other way to
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free it; for temporary uses of section data, see bfd_malloc_and_get_section.
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SECT may not have relocations. If there is an error reading the section,
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this issues a warning, sets *SIZE to 0, and returns NULL. */
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const gdb_byte *gdb_bfd_map_section (asection *section, bfd_size_type *size);
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/* Compute the CRC for ABFD. The CRC is used to find and verify
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separate debug files. When successful, this fills in *CRC_OUT and
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returns 1. Otherwise, this issues a warning and returns 0. */
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int gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out);
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/* A wrapper for bfd_fopen that initializes the gdb-specific reference
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count. */
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gdb_bfd_ref_ptr gdb_bfd_fopen (const char *, const char *, const char *, int);
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/* A wrapper for bfd_openr that initializes the gdb-specific reference
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count. */
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gdb_bfd_ref_ptr gdb_bfd_openr (const char *, const char *);
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/* A wrapper for bfd_openw that initializes the gdb-specific reference
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count. */
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gdb_bfd_ref_ptr gdb_bfd_openw (const char *, const char *);
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/* A wrapper for bfd_openr_iovec that initializes the gdb-specific
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reference count. */
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gdb_bfd_ref_ptr gdb_bfd_openr_iovec (const char *filename, const char *target,
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void *(*open_func) (struct bfd *nbfd,
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void *open_closure),
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void *open_closure,
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file_ptr (*pread_func) (struct bfd *nbfd,
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void *stream,
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void *buf,
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file_ptr nbytes,
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file_ptr offset),
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int (*close_func) (struct bfd *nbfd,
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void *stream),
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int (*stat_func) (struct bfd *abfd,
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void *stream,
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struct stat *sb));
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/* A wrapper for bfd_openr_next_archived_file that initializes the
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gdb-specific reference count. */
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gdb_bfd_ref_ptr gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous);
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/* Return the index of the BFD section SECTION. Ordinarily this is
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just the section's index, but for some special sections, like
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bfd_com_section_ptr, it will be a synthesized value. */
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int gdb_bfd_section_index (bfd *abfd, asection *section);
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/* Like bfd_count_sections, but include any possible global sections,
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like bfd_com_section_ptr. */
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int gdb_bfd_count_sections (bfd *abfd);
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/* Return true if any section requires relocations, false
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otherwise. */
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int gdb_bfd_requires_relocations (bfd *abfd);
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#endif /* GDB_BFD_H */
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