[deliverable/binutils-gdb.git] / gdb / gdb_bfd.h

/* Definitions for BFD wrappers used by GDB.

   Copyright (C) 2011-2015 Free Software Foundation, Inc.

   This file is part of GDB.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

#ifndef GDB_BFD_H
#define GDB_BFD_H

#include "registry.h"

DECLARE_REGISTRY (bfd);

/* If supplied a path starting with this sequence, gdb_bfd_open will
   open BFDs using target fileio operations.  */

#define TARGET_SYSROOT_PREFIX "target:"

/* Returns nonzero if NAME starts with TARGET_SYSROOT_PREFIX, zero
   otherwise.  */

int is_target_filename (const char *name);

/* Returns nonzero if the filename associated with ABFD starts with
   TARGET_SYSROOT_PREFIX, zero otherwise.  */

int gdb_bfd_has_target_filename (struct bfd *abfd);

/* Open a read-only (FOPEN_RB) BFD given arguments like bfd_fopen.
   If NAME starts with TARGET_SYSROOT_PREFIX then the BFD will be
   opened using target fileio operations if necessary.  Returns NULL
   on error.  On success, returns a new reference to the BFD, which
   must be freed with gdb_bfd_unref.  BFDs returned by this call are
   shared among all callers opening the same file.  If FD is not -1,
   then after this call it is owned by BFD.  If the BFD was not
   accessed using target fileio operations then the filename
   associated with the BFD and accessible with bfd_get_filename will
   not be exactly NAME but rather NAME with TARGET_SYSROOT_PREFIX
   stripped.  */

struct bfd *gdb_bfd_open (const char *name, const char *target, int fd);

/* Increment the reference count of ABFD.  It is fine for ABFD to be
   NULL; in this case the function does nothing.  */

void gdb_bfd_ref (struct bfd *abfd);

/* Decrement the reference count of ABFD.  If this is the last
   reference, ABFD will be freed.  If ABFD is NULL, this function does
   nothing.  */

void gdb_bfd_unref (struct bfd *abfd);

/* Mark the CHILD BFD as being a member of PARENT.  Also, increment
   the reference count of CHILD.  Calling this function ensures that
   as along as CHILD remains alive, PARENT will as well.  Both CHILD
   and PARENT must be non-NULL.  This can be called more than once
   with the same arguments; but it is not allowed to call it for a
   single CHILD with different values for PARENT.  */

void gdb_bfd_mark_parent (bfd *child, bfd *parent);

/* Mark INCLUDEE as being included by INCLUDER.
   This is used to associate the life time of INCLUDEE with INCLUDER.
   For example, with Fission, one file can refer to debug info in another
   file, and internal tables we build for the main file (INCLUDER) may refer
   to data contained in INCLUDEE.  Therefore we want to keep INCLUDEE around
   at least as long as INCLUDER exists.

   Note that this is different than gdb_bfd_mark_parent because in our case
   lifetime tracking is based on the "parent" whereas in gdb_bfd_mark_parent
   lifetime tracking is based on the "child".  Plus in our case INCLUDEE could
   have multiple different "parents".  */

void gdb_bfd_record_inclusion (bfd *includer, bfd *includee);

/* Try to read or map the contents of the section SECT.  If
   successful, the section data is returned and *SIZE is set to the
   size of the section data; this may not be the same as the size
   according to bfd_get_section_size if the section was compressed.
   The returned section data is associated with the BFD and will be
   destroyed when the BFD is destroyed.  There is no other way to free
   it; for temporary uses of section data, see
   bfd_malloc_and_get_section.  SECT may not have relocations.  This
   function will throw on error.  */

const gdb_byte *gdb_bfd_map_section (asection *section, bfd_size_type *size);

/* Compute the CRC for ABFD.  The CRC is used to find and verify
   separate debug files.  When successful, this fills in *CRC_OUT and
   returns 1.  Otherwise, this issues a warning and returns 0.  */

int gdb_bfd_crc (struct bfd *abfd, unsigned long *crc_out);

\f

/* A wrapper for bfd_fopen that initializes the gdb-specific reference
   count.  */

bfd *gdb_bfd_fopen (const char *, const char *, const char *, int);

/* A wrapper for bfd_openr that initializes the gdb-specific reference
   count.  */

bfd *gdb_bfd_openr (const char *, const char *);

/* A wrapper for bfd_openw that initializes the gdb-specific reference
   count.  */

bfd *gdb_bfd_openw (const char *, const char *);

/* A wrapper for bfd_openr_iovec that initializes the gdb-specific
   reference count.  */

bfd *gdb_bfd_openr_iovec (const char *filename, const char *target,
			  void *(*open_func) (struct bfd *nbfd,
					      void *open_closure),
			  void *open_closure,
			  file_ptr (*pread_func) (struct bfd *nbfd,
						  void *stream,
						  void *buf,
						  file_ptr nbytes,
						  file_ptr offset),
			  int (*close_func) (struct bfd *nbfd,
					     void *stream),
			  int (*stat_func) (struct bfd *abfd,
					    void *stream,
					    struct stat *sb));

/* A wrapper for bfd_openr_next_archived_file that initializes the
   gdb-specific reference count.  */

bfd *gdb_bfd_openr_next_archived_file (bfd *archive, bfd *previous);

/* A wrapper for bfd_fdopenr that initializes the gdb-specific
   reference count.  */

bfd *gdb_bfd_fdopenr (const char *filename, const char *target, int fd);

\f

/* Return the index of the BFD section SECTION.  Ordinarily this is
   just the section's index, but for some special sections, like
   bfd_com_section_ptr, it will be a synthesized value.  */

int gdb_bfd_section_index (bfd *abfd, asection *section);


/* Like bfd_count_sections, but include any possible global sections,
   like bfd_com_section_ptr.  */

int gdb_bfd_count_sections (bfd *abfd);

/* Return true if any section requires relocations, false
   otherwise.  */

int gdb_bfd_requires_relocations (bfd *abfd);

#endif /* GDB_BFD_H */
Commit	Line	Data
cbb099e8 TT	1	/* Definitions for BFD wrappers used by GDB.
cbb099e8 TT	2
32d0add0	3	Copyright (C) 2011-2015 Free Software Foundation, Inc.
cbb099e8 TT	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	#ifndef GDB_BFD_H
	21	#define GDB_BFD_H
	22
e992eda4 TT	23	#include "registry.h"
	24
	25	DECLARE_REGISTRY (bfd);
	26
f08e97fe GB	27	/* If supplied a path starting with this sequence, gdb_bfd_open will
	28	open BFDs using target fileio operations. */
	29
	30	#define TARGET_SYSROOT_PREFIX "target:"
	31
	32	/* Returns nonzero if NAME starts with TARGET_SYSROOT_PREFIX, zero
	33	otherwise. */
	34
	35	int is_target_filename (const char *name);
	36
	37	/* Returns nonzero if the filename associated with ABFD starts with
	38	TARGET_SYSROOT_PREFIX, zero otherwise. */
	39
	40	int gdb_bfd_has_target_filename (struct bfd *abfd);
	41
6ec53d05	42	/* Open a read-only (FOPEN_RB) BFD given arguments like bfd_fopen.
f08e97fe GB	43	If NAME starts with TARGET_SYSROOT_PREFIX then the BFD will be
	44	opened using target fileio operations if necessary. Returns NULL
	45	on error. On success, returns a new reference to the BFD, which
	46	must be freed with gdb_bfd_unref. BFDs returned by this call are
	47	shared among all callers opening the same file. If FD is not -1,
	48	then after this call it is owned by BFD. If the BFD was not
	49	accessed using target fileio operations then the filename
	50	associated with the BFD and accessible with bfd_get_filename will
	51	not be exactly NAME but rather NAME with TARGET_SYSROOT_PREFIX
	52	stripped. */
6ec53d05 TT	53
	54	struct bfd gdb_bfd_open (const char name, const char *target, int fd);
	55
520b0001 TT	56	/* Increment the reference count of ABFD. It is fine for ABFD to be
520b0001 TT	57	NULL; in this case the function does nothing. */
cbb099e8	58
520b0001	59	void gdb_bfd_ref (struct bfd *abfd);
cbb099e8	60
520b0001 TT	61	/* Decrement the reference count of ABFD. If this is the last
	62	reference, ABFD will be freed. If ABFD is NULL, this function does
	63	nothing. */
cbb099e8 TT	64
	65	void gdb_bfd_unref (struct bfd *abfd);
	66
0cd61f44 TT	67	/* Mark the CHILD BFD as being a member of PARENT. Also, increment
	68	the reference count of CHILD. Calling this function ensures that
	69	as along as CHILD remains alive, PARENT will as well. Both CHILD
	70	and PARENT must be non-NULL. This can be called more than once
	71	with the same arguments; but it is not allowed to call it for a
	72	single CHILD with different values for PARENT. */
	73
	74	void gdb_bfd_mark_parent (bfd child, bfd parent);
	75
13aaf454 DE	76	/* Mark INCLUDEE as being included by INCLUDER.
	77	This is used to associate the life time of INCLUDEE with INCLUDER.
	78	For example, with Fission, one file can refer to debug info in another
	79	file, and internal tables we build for the main file (INCLUDER) may refer
	80	to data contained in INCLUDEE. Therefore we want to keep INCLUDEE around
	81	at least as long as INCLUDER exists.
	82
	83	Note that this is different than gdb_bfd_mark_parent because in our case
	84	lifetime tracking is based on the "parent" whereas in gdb_bfd_mark_parent
	85	lifetime tracking is based on the "child". Plus in our case INCLUDEE could
	86	have multiple different "parents". */
	87
	88	void gdb_bfd_record_inclusion (bfd includer, bfd includee);
	89
4bf44c1c TT	90	/* Try to read or map the contents of the section SECT. If
	91	successful, the section data is returned and *SIZE is set to the
	92	size of the section data; this may not be the same as the size
	93	according to bfd_get_section_size if the section was compressed.
	94	The returned section data is associated with the BFD and will be
	95	destroyed when the BFD is destroyed. There is no other way to free
	96	it; for temporary uses of section data, see
	97	bfd_malloc_and_get_section. SECT may not have relocations. This
	98	function will throw on error. */
	99
	100	const gdb_byte gdb_bfd_map_section (asection section, bfd_size_type *size);
	101
dccee2de TT	102	/* Compute the CRC for ABFD. The CRC is used to find and verify
	103	separate debug files. When successful, this fills in *CRC_OUT and
	104	returns 1. Otherwise, this issues a warning and returns 0. */
	105
	106	int gdb_bfd_crc (struct bfd abfd, unsigned long crc_out);
	107
64c31149 TT	108	\f
	109
	110	/* A wrapper for bfd_fopen that initializes the gdb-specific reference
adcf2eed	111	count. */
64c31149 TT	112
	113	bfd gdb_bfd_fopen (const char , const char , const char , int);
	114
	115	/* A wrapper for bfd_openr that initializes the gdb-specific reference
adcf2eed	116	count. */
64c31149 TT	117
	118	bfd gdb_bfd_openr (const char , const char *);
	119
	120	/* A wrapper for bfd_openw that initializes the gdb-specific reference
adcf2eed	121	count. */
64c31149 TT	122
	123	bfd gdb_bfd_openw (const char , const char *);
	124
	125	/* A wrapper for bfd_openr_iovec that initializes the gdb-specific
adcf2eed	126	reference count. */
64c31149 TT	127
	128	bfd gdb_bfd_openr_iovec (const char filename, const char *target,
	129	void (open_func) (struct bfd *nbfd,
	130	void *open_closure),
	131	void *open_closure,
	132	file_ptr (pread_func) (struct bfd nbfd,
	133	void *stream,
	134	void *buf,
	135	file_ptr nbytes,
	136	file_ptr offset),
	137	int (close_func) (struct bfd nbfd,
	138	void *stream),
	139	int (stat_func) (struct bfd abfd,
	140	void *stream,
	141	struct stat *sb));
	142
	143	/* A wrapper for bfd_openr_next_archived_file that initializes the
adcf2eed	144	gdb-specific reference count. */
64c31149 TT	145
	146	bfd gdb_bfd_openr_next_archived_file (bfd archive, bfd *previous);
	147
	148	/* A wrapper for bfd_fdopenr that initializes the gdb-specific
adcf2eed	149	reference count. */
64c31149 TT	150
	151	bfd gdb_bfd_fdopenr (const char filename, const char *target, int fd);
	152
65cf3563 TT	153	\f
	154
	155	/* Return the index of the BFD section SECTION. Ordinarily this is
	156	just the section's index, but for some special sections, like
	157	bfd_com_section_ptr, it will be a synthesized value. */
	158
	159	int gdb_bfd_section_index (bfd abfd, asection section);
	160
	161
	162	/* Like bfd_count_sections, but include any possible global sections,
	163	like bfd_com_section_ptr. */
	164
	165	int gdb_bfd_count_sections (bfd *abfd);
	166
1da77581 TT	167	/* Return true if any section requires relocations, false
	168	otherwise. */
	169
	170	int gdb_bfd_requires_relocations (bfd *abfd);
	171
cbb099e8	172	#endif /* GDB_BFD_H */