[thirdparty/glibc.git] / include / link.h

/* Data structure for communication from the run-time dynamic linker for
   loaded ELF shared objects.
   Copyright (C) 1995-2016 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library 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
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef	_PRIVATE_LINK_H
#define	_PRIVATE_LINK_H	1

#ifdef _LINK_H
# error this should be impossible
#endif

/* Get most of the contents from the public header, but we define a
   different `struct link_map' type for private use.  The la_objopen
   prototype uses the type, so we have to declare it separately.  */
#define link_map	link_map_public
#define la_objopen	la_objopen_wrongproto
#include <elf/link.h>
#undef	link_map
#undef	la_objopen

struct link_map;
extern unsigned int la_objopen (struct link_map *__map, Lmid_t __lmid,
				uintptr_t *__cookie);

#include <stdint.h>
#include <stddef.h>
#include <linkmap.h>
#include <dl-fileid.h>
#include <dl-lookupcfg.h>
#include <tls.h>
#include <libc-lock.h>


/* Some internal data structures of the dynamic linker used in the
   linker map.  We only provide forward declarations.  */
struct libname_list;
struct r_found_version;
struct r_search_path_elem;

/* Forward declaration.  */
struct link_map;

/* Structure to describe a single list of scope elements.  The lookup
   functions get passed an array of pointers to such structures.  */
struct r_scope_elem
{
  /* Array of maps for the scope.  */
  struct link_map **r_list;
  /* Number of entries in the scope.  */
  unsigned int r_nlist;
};


/* Structure to record search path and allocation mechanism.  */
struct r_search_path_struct
  {
    struct r_search_path_elem **dirs;
    int malloced;
  };


/* Structure describing a loaded shared object.  The `l_next' and `l_prev'
   members form a chain of all the shared objects loaded at startup.

   These data structures exist in space used by the run-time dynamic linker;
   modifying them may have disastrous results.

   This data structure might change in future, if necessary.  User-level
   programs must avoid defining objects of this type.  */

struct link_map
  {
    /* These first few members are part of the protocol with the debugger.
       This is the same format used in SVR4.  */

    ElfW(Addr) l_addr;		/* Difference between the address in the ELF
				   file and the addresses in memory.  */
    char *l_name;		/* Absolute file name object was found in.  */
    ElfW(Dyn) *l_ld;		/* Dynamic section of the shared object.  */
    struct link_map *l_next, *l_prev; /* Chain of loaded objects.  */

    /* All following members are internal to the dynamic linker.
       They may change without notice.  */

    /* This is an element which is only ever different from a pointer to
       the very same copy of this type for ld.so when it is used in more
       than one namespace.  */
    struct link_map *l_real;

    /* Number of the namespace this link map belongs to.  */
    Lmid_t l_ns;

    struct libname_list *l_libname;
    /* Indexed pointers to dynamic section.
       [0,DT_NUM) are indexed by the processor-independent tags.
       [DT_NUM,DT_NUM+DT_THISPROCNUM) are indexed by the tag minus DT_LOPROC.
       [DT_NUM+DT_THISPROCNUM,DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM) are
       indexed by DT_VERSIONTAGIDX(tagvalue).
       [DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM,
	DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM) are indexed by
       DT_EXTRATAGIDX(tagvalue).
       [DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM,
	DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM+DT_VALNUM) are
       indexed by DT_VALTAGIDX(tagvalue) and
       [DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM+DT_VALNUM,
	DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM+DT_VALNUM+DT_ADDRNUM)
       are indexed by DT_ADDRTAGIDX(tagvalue), see <elf.h>.  */

    ElfW(Dyn) *l_info[DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM
		      + DT_EXTRANUM + DT_VALNUM + DT_ADDRNUM];
    const ElfW(Phdr) *l_phdr;	/* Pointer to program header table in core.  */
    ElfW(Addr) l_entry;		/* Entry point location.  */
    ElfW(Half) l_phnum;		/* Number of program header entries.  */
    ElfW(Half) l_ldnum;		/* Number of dynamic segment entries.  */

    /* Array of DT_NEEDED dependencies and their dependencies, in
       dependency order for symbol lookup (with and without
       duplicates).  There is no entry before the dependencies have
       been loaded.  */
    struct r_scope_elem l_searchlist;

    /* We need a special searchlist to process objects marked with
       DT_SYMBOLIC.  */
    struct r_scope_elem l_symbolic_searchlist;

    /* Dependent object that first caused this object to be loaded.  */
    struct link_map *l_loader;

    /* Array with version names.  */
    struct r_found_version *l_versions;
    unsigned int l_nversions;

    /* Symbol hash table.  */
    Elf_Symndx l_nbuckets;
    Elf32_Word l_gnu_bitmask_idxbits;
    Elf32_Word l_gnu_shift;
    const ElfW(Addr) *l_gnu_bitmask;
    union
    {
      const Elf32_Word *l_gnu_buckets;
      const Elf_Symndx *l_chain;
    };
    union
    {
      const Elf32_Word *l_gnu_chain_zero;
      const Elf_Symndx *l_buckets;
    };

    unsigned int l_direct_opencount; /* Reference count for dlopen/dlclose.  */
    enum			/* Where this object came from.  */
      {
	lt_executable,		/* The main executable program.  */
	lt_library,		/* Library needed by main executable.  */
	lt_loaded		/* Extra run-time loaded shared object.  */
      } l_type:2;
    unsigned int l_relocated:1;	/* Nonzero if object's relocations done.  */
    unsigned int l_init_called:1; /* Nonzero if DT_INIT function called.  */
    unsigned int l_global:1;	/* Nonzero if object in _dl_global_scope.  */
    unsigned int l_reserved:2;	/* Reserved for internal use.  */
    unsigned int l_phdr_allocated:1; /* Nonzero if the data structure pointed
					to by `l_phdr' is allocated.  */
    unsigned int l_soname_added:1; /* Nonzero if the SONAME is for sure in
				      the l_libname list.  */
    unsigned int l_faked:1;	/* Nonzero if this is a faked descriptor
				   without associated file.  */
    unsigned int l_need_tls_init:1; /* Nonzero if GL(dl_init_static_tls)
				       should be called on this link map
				       when relocation finishes.  */
    unsigned int l_auditing:1;	/* Nonzero if the DSO is used in auditing.  */
    unsigned int l_audit_any_plt:1; /* Nonzero if at least one audit module
				       is interested in the PLT interception.*/
    unsigned int l_removed:1;	/* Nozero if the object cannot be used anymore
				   since it is removed.  */
    unsigned int l_contiguous:1; /* Nonzero if inter-segment holes are
				    mprotected or if no holes are present at
				    all.  */
    unsigned int l_symbolic_in_local_scope:1; /* Nonzero if l_local_scope
						 during LD_TRACE_PRELINKING=1
						 contains any DT_SYMBOLIC
						 libraries.  */
    unsigned int l_free_initfini:1; /* Nonzero if l_initfini can be
				       freed, ie. not allocated with
				       the dummy malloc in ld.so.  */

    /* Collected information about own RPATH directories.  */
    struct r_search_path_struct l_rpath_dirs;

    /* Collected results of relocation while profiling.  */
    struct reloc_result
    {
      DL_FIXUP_VALUE_TYPE addr;
      struct link_map *bound;
      unsigned int boundndx;
      uint32_t enterexit;
      unsigned int flags;
    } *l_reloc_result;

    /* Pointer to the version information if available.  */
    ElfW(Versym) *l_versyms;

    /* String specifying the path where this object was found.  */
    const char *l_origin;

    /* Start and finish of memory map for this object.  l_map_start
       need not be the same as l_addr.  */
    ElfW(Addr) l_map_start, l_map_end;
    /* End of the executable part of the mapping.  */
    ElfW(Addr) l_text_end;

    /* Default array for 'l_scope'.  */
    struct r_scope_elem *l_scope_mem[4];
    /* Size of array allocated for 'l_scope'.  */
    size_t l_scope_max;
    /* This is an array defining the lookup scope for this link map.
       There are initially at most three different scope lists.  */
    struct r_scope_elem **l_scope;

    /* A similar array, this time only with the local scope.  This is
       used occasionally.  */
    struct r_scope_elem *l_local_scope[2];

    /* This information is kept to check for sure whether a shared
       object is the same as one already loaded.  */
    struct r_file_id l_file_id;

    /* Collected information about own RUNPATH directories.  */
    struct r_search_path_struct l_runpath_dirs;

    /* List of object in order of the init and fini calls.  */
    struct link_map **l_initfini;

    /* List of the dependencies introduced through symbol binding.  */
    struct link_map_reldeps
      {
	unsigned int act;
	struct link_map *list[];
      } *l_reldeps;
    unsigned int l_reldepsmax;

    /* Nonzero if the DSO is used.  */
    unsigned int l_used;

    /* Various flag words.  */
    ElfW(Word) l_feature_1;
    ElfW(Word) l_flags_1;
    ElfW(Word) l_flags;

    /* Temporarily used in `dl_close'.  */
    int l_idx;

    struct link_map_machine l_mach;

    struct
    {
      const ElfW(Sym) *sym;
      int type_class;
      struct link_map *value;
      const ElfW(Sym) *ret;
    } l_lookup_cache;

    /* Thread-local storage related info.  */

    /* Start of the initialization image.  */
    void *l_tls_initimage;
    /* Size of the initialization image.  */
    size_t l_tls_initimage_size;
    /* Size of the TLS block.  */
    size_t l_tls_blocksize;
    /* Alignment requirement of the TLS block.  */
    size_t l_tls_align;
    /* Offset of first byte module alignment.  */
    size_t l_tls_firstbyte_offset;
#ifndef NO_TLS_OFFSET
# define NO_TLS_OFFSET	0
#endif
#ifndef FORCED_DYNAMIC_TLS_OFFSET
# if NO_TLS_OFFSET == 0
#  define FORCED_DYNAMIC_TLS_OFFSET -1
# elif NO_TLS_OFFSET == -1
#  define FORCED_DYNAMIC_TLS_OFFSET -2
# else
#  error "FORCED_DYNAMIC_TLS_OFFSET is not defined"
# endif
#endif
    /* For objects present at startup time: offset in the static TLS block.  */
    ptrdiff_t l_tls_offset;
    /* Index of the module in the dtv array.  */
    size_t l_tls_modid;

    /* Number of thread_local objects constructed by this DSO.  This is
       atomically accessed and modified and is not always protected by the load
       lock.  See also: CONCURRENCY NOTES in cxa_thread_atexit_impl.c.  */
    size_t l_tls_dtor_count;

    /* Information used to change permission after the relocations are
       done.  */
    ElfW(Addr) l_relro_addr;
    size_t l_relro_size;

    unsigned long long int l_serial;

    /* Audit information.  This array apparent must be the last in the
       structure.  Never add something after it.  */
    struct auditstate
    {
      uintptr_t cookie;
      unsigned int bindflags;
    } l_audit[0];
  };


#if __ELF_NATIVE_CLASS == 32
# define symbind symbind32
#elif __ELF_NATIVE_CLASS == 64
# define symbind symbind64
#else
# error "__ELF_NATIVE_CLASS must be defined"
#endif

extern int __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info,
					       size_t size, void *data),
			      void *data);

/* We use this macro to refer to ELF macros independent of the native
   wordsize.  `ELFW(R_TYPE)' is used in place of `ELF32_R_TYPE' or
   `ELF64_R_TYPE'.  */
#define ELFW(type)	_ElfW (ELF, __ELF_NATIVE_CLASS, type)

#endif /* include/link.h */
Commit	Line	Data
7e6d3809 UD	1	/* Data structure for communication from the run-time dynamic linker for
7e6d3809 UD	2	loaded ELF shared objects.
f7a9f785	3	Copyright (C) 1995-2016 Free Software Foundation, Inc.
7e6d3809 UD	4	This file is part of the GNU C Library.
	5
	6	The GNU C Library is free software; you can redistribute it and/or
41bdb6e2 AJ	7	modify it under the terms of the GNU Lesser General Public
	8	License as published by the Free Software Foundation; either
	9	version 2.1 of the License, or (at your option) any later version.
7e6d3809 UD	10
	11	The GNU C Library is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
41bdb6e2	14	Lesser General Public License for more details.
7e6d3809	15
41bdb6e2	16	You should have received a copy of the GNU Lesser General Public
59ba27a6 PE	17	License along with the GNU C Library; if not, see
59ba27a6 PE	18	<http://www.gnu.org/licenses/>. */
7e6d3809	19
d78efd9f RM	20	#ifndef _PRIVATE_LINK_H
d78efd9f RM	21	#define _PRIVATE_LINK_H 1
7e6d3809	22
d78efd9f RM	23	#ifdef _LINK_H
	24	# error this should be impossible
	25	#endif
	26
	27	/* Get most of the contents from the public header, but we define a
	28	different `struct link_map' type for private use. The la_objopen
	29	prototype uses the type, so we have to declare it separately. */
	30	#define link_map link_map_public
	31	#define la_objopen la_objopen_wrongproto
	32	#include <elf/link.h>
	33	#undef link_map
	34	#undef la_objopen
	35
	36	struct link_map;
	37	extern unsigned int la_objopen (struct link_map *__map, Lmid_t __lmid,
	38	uintptr_t *__cookie);
7e6d3809	39
e054f494	40	#include <stdint.h>
d78efd9f	41	#include <stddef.h>
522e02ab	42	#include <linkmap.h>
c01ae97e	43	#include <dl-fileid.h>
a334319f	44	#include <dl-lookupcfg.h>
b52bbc1b	45	#include <tls.h>
ec999b8e	46	#include <libc-lock.h>
7e6d3809	47
7e6d3809 UD	48
	49	/* Some internal data structures of the dynamic linker used in the
	50	linker map. We only provide forward declarations. */
	51	struct libname_list;
	52	struct r_found_version;
	53	struct r_search_path_elem;
	54
	55	/* Forward declaration. */
	56	struct link_map;
	57
	58	/* Structure to describe a single list of scope elements. The lookup
	59	functions get passed an array of pointers to such structures. */
	60	struct r_scope_elem
	61	{
	62	/* Array of maps for the scope. */
	63	struct link_map **r_list;
	64	/* Number of entries in the scope. */
	65	unsigned int r_nlist;
7e6d3809 UD	66	};
	67
	68
f55727ca UD	69	/* Structure to record search path and allocation mechanism. */
	70	struct r_search_path_struct
	71	{
	72	struct r_search_path_elem **dirs;
	73	int malloced;
	74	};
	75
	76
7e6d3809 UD	77	/* Structure describing a loaded shared object. The `l_next' and `l_prev'
	78	members form a chain of all the shared objects loaded at startup.
	79
	80	These data structures exist in space used by the run-time dynamic linker;
	81	modifying them may have disastrous results.
	82
	83	This data structure might change in future, if necessary. User-level
	84	programs must avoid defining objects of this type. */
	85
	86	struct link_map
	87	{
	88	/* These first few members are part of the protocol with the debugger.
	89	This is the same format used in SVR4. */
	90
542f9466 JK	91	ElfW(Addr) l_addr; /* Difference between the address in the ELF
542f9466 JK	92	file and the addresses in memory. */
7e6d3809 UD	93	char l_name; / Absolute file name object was found in. */
	94	ElfW(Dyn) l_ld; / Dynamic section of the shared object. */
	95	struct link_map l_next, l_prev; /* Chain of loaded objects. */
	96
	97	/* All following members are internal to the dynamic linker.
	98	They may change without notice. */
	99
c0f62c56 UD	100	/* This is an element which is only ever different from a pointer to
	101	the very same copy of this type for ld.so when it is used in more
	102	than one namespace. */
	103	struct link_map *l_real;
	104
	105	/* Number of the namespace this link map belongs to. */
	106	Lmid_t l_ns;
	107
7e6d3809 UD	108	struct libname_list *l_libname;
	109	/* Indexed pointers to dynamic section.
	110	[0,DT_NUM) are indexed by the processor-independent tags.
	111	[DT_NUM,DT_NUM+DT_THISPROCNUM) are indexed by the tag minus DT_LOPROC.
32e6df36 UD	112	[DT_NUM+DT_THISPROCNUM,DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM) are
32e6df36 UD	113	indexed by DT_VERSIONTAGIDX(tagvalue).
7e6d3809	114	[DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM,
32e6df36 UD	115	DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM) are indexed by
	116	DT_EXTRATAGIDX(tagvalue).
	117	[DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM,
	118	DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM+DT_VALNUM) are
	119	indexed by DT_VALTAGIDX(tagvalue) and
	120	[DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM+DT_VALNUM,
	121	DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM+DT_VALNUM+DT_ADDRNUM)
	122	are indexed by DT_ADDRTAGIDX(tagvalue), see <elf.h>. */
7e6d3809 UD	123
7e6d3809 UD	124	ElfW(Dyn) *l_info[DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM
11bf311e	125	+ DT_EXTRANUM + DT_VALNUM + DT_ADDRNUM];
7e6d3809 UD	126	const ElfW(Phdr) l_phdr; / Pointer to program header table in core. */
	127	ElfW(Addr) l_entry; /* Entry point location. */
	128	ElfW(Half) l_phnum; /* Number of program header entries. */
871b9158	129	ElfW(Half) l_ldnum; /* Number of dynamic segment entries. */
7e6d3809 UD	130
	131	/* Array of DT_NEEDED dependencies and their dependencies, in
	132	dependency order for symbol lookup (with and without
	133	duplicates). There is no entry before the dependencies have
	134	been loaded. */
	135	struct r_scope_elem l_searchlist;
	136
	137	/* We need a special searchlist to process objects marked with
	138	DT_SYMBOLIC. */
	139	struct r_scope_elem l_symbolic_searchlist;
	140
	141	/* Dependent object that first caused this object to be loaded. */
	142	struct link_map *l_loader;
	143
341c566f UD	144	/* Array with version names. */
	145	struct r_found_version *l_versions;
	146	unsigned int l_nversions;
	147
7e6d3809 UD	148	/* Symbol hash table. */
7e6d3809 UD	149	Elf_Symndx l_nbuckets;
871b9158 UD	150	Elf32_Word l_gnu_bitmask_idxbits;
	151	Elf32_Word l_gnu_shift;
	152	const ElfW(Addr) *l_gnu_bitmask;
	153	union
	154	{
	155	const Elf32_Word *l_gnu_buckets;
	156	const Elf_Symndx *l_chain;
	157	};
	158	union
	159	{
	160	const Elf32_Word *l_gnu_chain_zero;
	161	const Elf_Symndx *l_buckets;
	162	};
7e6d3809	163
c0f62c56	164	unsigned int l_direct_opencount; /* Reference count for dlopen/dlclose. */
7e6d3809 UD	165	enum /* Where this object came from. */
	166	{
	167	lt_executable, /* The main executable program. */
	168	lt_library, /* Library needed by main executable. */
	169	lt_loaded /* Extra run-time loaded shared object. */
	170	} l_type:2;
	171	unsigned int l_relocated:1; /* Nonzero if object's relocations done. */
	172	unsigned int l_init_called:1; /* Nonzero if DT_INIT function called. */
	173	unsigned int l_global:1; /* Nonzero if object in _dl_global_scope. */
	174	unsigned int l_reserved:2; /* Reserved for internal use. */
	175	unsigned int l_phdr_allocated:1; /* Nonzero if the data structure pointed
	176	to by `l_phdr' is allocated. */
c91bc73e UD	177	unsigned int l_soname_added:1; /* Nonzero if the SONAME is for sure in
c91bc73e UD	178	the l_libname list. */
a881e0a0 UD	179	unsigned int l_faked:1; /* Nonzero if this is a faked descriptor
a881e0a0 UD	180	without associated file. */
adc12574 UD	181	unsigned int l_need_tls_init:1; /* Nonzero if GL(dl_init_static_tls)
	182	should be called on this link map
	183	when relocation finishes. */
9dcafc55 UD	184	unsigned int l_auditing:1; /* Nonzero if the DSO is used in auditing. */
	185	unsigned int l_audit_any_plt:1; /* Nonzero if at least one audit module
	186	is interested in the PLT interception.*/
20fe49b9 UD	187	unsigned int l_removed:1; /* Nozero if the object cannot be used anymore
20fe49b9 UD	188	since it is removed. */
9be09e06 UD	189	unsigned int l_contiguous:1; /* Nonzero if inter-segment holes are
	190	mprotected or if no holes are present at
	191	all. */
4ad43b62 UD	192	unsigned int l_symbolic_in_local_scope:1; /* Nonzero if l_local_scope
	193	during LD_TRACE_PRELINKING=1
	194	contains any DT_SYMBOLIC
	195	libraries. */
0479b305 AS	196	unsigned int l_free_initfini:1; /* Nonzero if l_initfini can be
	197	freed, ie. not allocated with
	198	the dummy malloc in ld.so. */
9dcafc55	199
7e6d3809	200	/* Collected information about own RPATH directories. */
f55727ca	201	struct r_search_path_struct l_rpath_dirs;
7e6d3809 UD	202
7e6d3809 UD	203	/* Collected results of relocation while profiling. */
9dcafc55 UD	204	struct reloc_result
9dcafc55 UD	205	{
6aa10807	206	DL_FIXUP_VALUE_TYPE addr;
9dcafc55 UD	207	struct link_map *bound;
	208	unsigned int boundndx;
	209	uint32_t enterexit;
	210	unsigned int flags;
	211	} *l_reloc_result;
7e6d3809 UD	212
	213	/* Pointer to the version information if available. */
	214	ElfW(Versym) *l_versyms;
	215
	216	/* String specifying the path where this object was found. */
	217	const char *l_origin;
	218
	219	/* Start and finish of memory map for this object. l_map_start
	220	need not be the same as l_addr. */
	221	ElfW(Addr) l_map_start, l_map_end;
eec8b6ca UD	222	/* End of the executable part of the mapping. */
eec8b6ca UD	223	ElfW(Addr) l_text_end;
7e6d3809	224
b98e518f	225	/* Default array for 'l_scope'. */
c0a777e8	226	struct r_scope_elem *l_scope_mem[4];
b98e518f UD	227	/* Size of array allocated for 'l_scope'. */
b98e518f UD	228	size_t l_scope_max;
7e6d3809	229	/* This is an array defining the lookup scope for this link map.
c69136ae	230	There are initially at most three different scope lists. */
c0a777e8	231	struct r_scope_elem **l_scope;
7e6d3809 UD	232
	233	/* A similar array, this time only with the local scope. This is
	234	used occasionally. */
	235	struct r_scope_elem *l_local_scope[2];
	236
	237	/* This information is kept to check for sure whether a shared
	238	object is the same as one already loaded. */
c01ae97e	239	struct r_file_id l_file_id;
7e6d3809 UD	240
7e6d3809 UD	241	/* Collected information about own RUNPATH directories. */
f55727ca	242	struct r_search_path_struct l_runpath_dirs;
7e6d3809 UD	243
	244	/* List of object in order of the init and fini calls. */
	245	struct link_map **l_initfini;
	246
	247	/* List of the dependencies introduced through symbol binding. */
385b4cf4 UD	248	struct link_map_reldeps
	249	{
	250	unsigned int act;
	251	struct link_map *list[];
	252	} *l_reldeps;
2af63968 UD	253	unsigned int l_reldepsmax;
	254
	255	/* Nonzero if the DSO is used. */
	256	unsigned int l_used;
bf8b3e74 UD	257
	258	/* Various flag words. */
	259	ElfW(Word) l_feature_1;
	260	ElfW(Word) l_flags_1;
ec70c011	261	ElfW(Word) l_flags;
69c33254 UD	262
69c33254 UD	263	/* Temporarily used in `dl_close'. */
20fe49b9	264	int l_idx;
370f00c3 UD	265
370f00c3 UD	266	struct link_map_machine l_mach;
680254fe UD	267
	268	struct
	269	{
	270	const ElfW(Sym) *sym;
cf5a372e	271	int type_class;
680254fe	272	struct link_map *value;
680254fe UD	273	const ElfW(Sym) *ret;
680254fe UD	274	} l_lookup_cache;
5d6feea8 UD	275
	276	/* Thread-local storage related info. */
	277
5d6feea8 UD	278	/* Start of the initialization image. */
	279	void *l_tls_initimage;
	280	/* Size of the initialization image. */
	281	size_t l_tls_initimage_size;
	282	/* Size of the TLS block. */
	283	size_t l_tls_blocksize;
877e0d8e	284	/* Alignment requirement of the TLS block. */
3fb55878	285	size_t l_tls_align;
99fe3b0e UD	286	/* Offset of first byte module alignment. */
99fe3b0e UD	287	size_t l_tls_firstbyte_offset;
11bf311e UD	288	#ifndef NO_TLS_OFFSET
11bf311e UD	289	# define NO_TLS_OFFSET 0
4c533566 UD	290	#endif
	291	#ifndef FORCED_DYNAMIC_TLS_OFFSET
	292	# if NO_TLS_OFFSET == 0
67cbf9a2	293	# define FORCED_DYNAMIC_TLS_OFFSET -1
4c533566 UD	294	# elif NO_TLS_OFFSET == -1
	295	# define FORCED_DYNAMIC_TLS_OFFSET -2
	296	# else
	297	# error "FORCED_DYNAMIC_TLS_OFFSET is not defined"
	298	# endif
11bf311e	299	#endif
5d6feea8 UD	300	/* For objects present at startup time: offset in the static TLS block. */
	301	ptrdiff_t l_tls_offset;
	302	/* Index of the module in the dtv array. */
	303	size_t l_tls_modid;
ed20b3d9	304
90b37cac SP	305	/* Number of thread_local objects constructed by this DSO. This is
	306	atomically accessed and modified and is not always protected by the load
	307	lock. See also: CONCURRENCY NOTES in cxa_thread_atexit_impl.c. */
ba384f6e SP	308	size_t l_tls_dtor_count;
ba384f6e SP	309
ed20b3d9 UD	310	/* Information used to change permission after the relocations are
	311	done. */
	312	ElfW(Addr) l_relro_addr;
	313	size_t l_relro_size;
9dcafc55	314
b90395e6 UD	315	unsigned long long int l_serial;
b90395e6 UD	316
9dcafc55 UD	317	/* Audit information. This array apparent must be the last in the
	318	structure. Never add something after it. */
	319	struct auditstate
	320	{
	321	uintptr_t cookie;
	322	unsigned int bindflags;
	323	} l_audit[0];
	324	};
	325
9dcafc55 UD	326
	327	#if __ELF_NATIVE_CLASS == 32
	328	# define symbind symbind32
9dcafc55 UD	329	#elif __ELF_NATIVE_CLASS == 64
	330	# define symbind symbind64
	331	#else
	332	# error "__ELF_NATIVE_CLASS must be defined"
	333	#endif
	334
48ab1c2f UD	335	extern int __dl_iterate_phdr (int (callback) (struct dl_phdr_info info,
	336	size_t size, void *data),
	337	void *data);
	338
81b035fe L	339	/* We use this macro to refer to ELF macros independent of the native
	340	wordsize. `ELFW(R_TYPE)' is used in place of `ELF32_R_TYPE' or
	341	`ELF64_R_TYPE'. */
	342	#define ELFW(type) _ElfW (ELF, __ELF_NATIVE_CLASS, type)
	343
d78efd9f	344	#endif /* include/link.h */