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

/* Data structure for communication from the run-time dynamic linker for
   loaded ELF shared objects.
   Copyright (C) 1995-2017 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

# ifndef _ISOMAC
/* 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
# endif

#include <elf/link.h>

# ifndef _ISOMAC

#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 /* !_ISOMAC */
#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.
bfff8b1b	3	Copyright (C) 1995-2017 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
47755784	27	# ifndef _ISOMAC
d78efd9f RM	28	/* Get most of the contents from the public header, but we define a
	29	different `struct link_map' type for private use. The la_objopen
	30	prototype uses the type, so we have to declare it separately. */
47755784 ZW	31	# define link_map link_map_public
	32	# define la_objopen la_objopen_wrongproto
	33	# endif
	34
d78efd9f	35	#include <elf/link.h>
47755784 ZW	36
	37	# ifndef _ISOMAC
	38
d78efd9f RM	39	#undef link_map
	40	#undef la_objopen
	41
	42	struct link_map;
	43	extern unsigned int la_objopen (struct link_map *__map, Lmid_t __lmid,
	44	uintptr_t *__cookie);
7e6d3809	45
e054f494	46	#include <stdint.h>
d78efd9f	47	#include <stddef.h>
522e02ab	48	#include <linkmap.h>
c01ae97e	49	#include <dl-fileid.h>
a334319f	50	#include <dl-lookupcfg.h>
b52bbc1b	51	#include <tls.h>
ec999b8e	52	#include <libc-lock.h>
7e6d3809	53
7e6d3809 UD	54
	55	/* Some internal data structures of the dynamic linker used in the
	56	linker map. We only provide forward declarations. */
	57	struct libname_list;
	58	struct r_found_version;
	59	struct r_search_path_elem;
	60
	61	/* Forward declaration. */
	62	struct link_map;
	63
	64	/* Structure to describe a single list of scope elements. The lookup
	65	functions get passed an array of pointers to such structures. */
	66	struct r_scope_elem
	67	{
	68	/* Array of maps for the scope. */
	69	struct link_map **r_list;
	70	/* Number of entries in the scope. */
	71	unsigned int r_nlist;
7e6d3809 UD	72	};
	73
	74
f55727ca UD	75	/* Structure to record search path and allocation mechanism. */
	76	struct r_search_path_struct
	77	{
	78	struct r_search_path_elem **dirs;
	79	int malloced;
	80	};
	81
	82
7e6d3809 UD	83	/* Structure describing a loaded shared object. The `l_next' and `l_prev'
	84	members form a chain of all the shared objects loaded at startup.
	85
	86	These data structures exist in space used by the run-time dynamic linker;
	87	modifying them may have disastrous results.
	88
	89	This data structure might change in future, if necessary. User-level
	90	programs must avoid defining objects of this type. */
	91
	92	struct link_map
	93	{
	94	/* These first few members are part of the protocol with the debugger.
	95	This is the same format used in SVR4. */
	96
542f9466 JK	97	ElfW(Addr) l_addr; /* Difference between the address in the ELF
542f9466 JK	98	file and the addresses in memory. */
7e6d3809 UD	99	char l_name; / Absolute file name object was found in. */
	100	ElfW(Dyn) l_ld; / Dynamic section of the shared object. */
	101	struct link_map l_next, l_prev; /* Chain of loaded objects. */
	102
	103	/* All following members are internal to the dynamic linker.
	104	They may change without notice. */
	105
c0f62c56 UD	106	/* This is an element which is only ever different from a pointer to
	107	the very same copy of this type for ld.so when it is used in more
	108	than one namespace. */
	109	struct link_map *l_real;
	110
	111	/* Number of the namespace this link map belongs to. */
	112	Lmid_t l_ns;
	113
7e6d3809 UD	114	struct libname_list *l_libname;
	115	/* Indexed pointers to dynamic section.
	116	[0,DT_NUM) are indexed by the processor-independent tags.
	117	[DT_NUM,DT_NUM+DT_THISPROCNUM) are indexed by the tag minus DT_LOPROC.
32e6df36 UD	118	[DT_NUM+DT_THISPROCNUM,DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM) are
32e6df36 UD	119	indexed by DT_VERSIONTAGIDX(tagvalue).
7e6d3809	120	[DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM,
32e6df36 UD	121	DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM) are indexed by
	122	DT_EXTRATAGIDX(tagvalue).
	123	[DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM,
	124	DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM+DT_VALNUM) are
	125	indexed by DT_VALTAGIDX(tagvalue) and
	126	[DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM+DT_VALNUM,
	127	DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM+DT_VALNUM+DT_ADDRNUM)
	128	are indexed by DT_ADDRTAGIDX(tagvalue), see <elf.h>. */
7e6d3809 UD	129
7e6d3809 UD	130	ElfW(Dyn) *l_info[DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM
11bf311e	131	+ DT_EXTRANUM + DT_VALNUM + DT_ADDRNUM];
7e6d3809 UD	132	const ElfW(Phdr) l_phdr; / Pointer to program header table in core. */
	133	ElfW(Addr) l_entry; /* Entry point location. */
	134	ElfW(Half) l_phnum; /* Number of program header entries. */
871b9158	135	ElfW(Half) l_ldnum; /* Number of dynamic segment entries. */
7e6d3809 UD	136
	137	/* Array of DT_NEEDED dependencies and their dependencies, in
	138	dependency order for symbol lookup (with and without
	139	duplicates). There is no entry before the dependencies have
	140	been loaded. */
	141	struct r_scope_elem l_searchlist;
	142
	143	/* We need a special searchlist to process objects marked with
	144	DT_SYMBOLIC. */
	145	struct r_scope_elem l_symbolic_searchlist;
	146
	147	/* Dependent object that first caused this object to be loaded. */
	148	struct link_map *l_loader;
	149
341c566f UD	150	/* Array with version names. */
	151	struct r_found_version *l_versions;
	152	unsigned int l_nversions;
	153
7e6d3809 UD	154	/* Symbol hash table. */
7e6d3809 UD	155	Elf_Symndx l_nbuckets;
871b9158 UD	156	Elf32_Word l_gnu_bitmask_idxbits;
	157	Elf32_Word l_gnu_shift;
	158	const ElfW(Addr) *l_gnu_bitmask;
	159	union
	160	{
	161	const Elf32_Word *l_gnu_buckets;
	162	const Elf_Symndx *l_chain;
	163	};
	164	union
	165	{
	166	const Elf32_Word *l_gnu_chain_zero;
	167	const Elf_Symndx *l_buckets;
	168	};
7e6d3809	169
c0f62c56	170	unsigned int l_direct_opencount; /* Reference count for dlopen/dlclose. */
7e6d3809 UD	171	enum /* Where this object came from. */
	172	{
	173	lt_executable, /* The main executable program. */
	174	lt_library, /* Library needed by main executable. */
	175	lt_loaded /* Extra run-time loaded shared object. */
	176	} l_type:2;
	177	unsigned int l_relocated:1; /* Nonzero if object's relocations done. */
	178	unsigned int l_init_called:1; /* Nonzero if DT_INIT function called. */
	179	unsigned int l_global:1; /* Nonzero if object in _dl_global_scope. */
	180	unsigned int l_reserved:2; /* Reserved for internal use. */
	181	unsigned int l_phdr_allocated:1; /* Nonzero if the data structure pointed
	182	to by `l_phdr' is allocated. */
c91bc73e UD	183	unsigned int l_soname_added:1; /* Nonzero if the SONAME is for sure in
c91bc73e UD	184	the l_libname list. */
a881e0a0 UD	185	unsigned int l_faked:1; /* Nonzero if this is a faked descriptor
a881e0a0 UD	186	without associated file. */
adc12574 UD	187	unsigned int l_need_tls_init:1; /* Nonzero if GL(dl_init_static_tls)
	188	should be called on this link map
	189	when relocation finishes. */
9dcafc55 UD	190	unsigned int l_auditing:1; /* Nonzero if the DSO is used in auditing. */
	191	unsigned int l_audit_any_plt:1; /* Nonzero if at least one audit module
	192	is interested in the PLT interception.*/
20fe49b9 UD	193	unsigned int l_removed:1; /* Nozero if the object cannot be used anymore
20fe49b9 UD	194	since it is removed. */
9be09e06 UD	195	unsigned int l_contiguous:1; /* Nonzero if inter-segment holes are
	196	mprotected or if no holes are present at
	197	all. */
4ad43b62 UD	198	unsigned int l_symbolic_in_local_scope:1; /* Nonzero if l_local_scope
	199	during LD_TRACE_PRELINKING=1
	200	contains any DT_SYMBOLIC
	201	libraries. */
0479b305 AS	202	unsigned int l_free_initfini:1; /* Nonzero if l_initfini can be
	203	freed, ie. not allocated with
	204	the dummy malloc in ld.so. */
9dcafc55	205
7e6d3809	206	/* Collected information about own RPATH directories. */
f55727ca	207	struct r_search_path_struct l_rpath_dirs;
7e6d3809 UD	208
7e6d3809 UD	209	/* Collected results of relocation while profiling. */
9dcafc55 UD	210	struct reloc_result
9dcafc55 UD	211	{
6aa10807	212	DL_FIXUP_VALUE_TYPE addr;
9dcafc55 UD	213	struct link_map *bound;
	214	unsigned int boundndx;
	215	uint32_t enterexit;
	216	unsigned int flags;
	217	} *l_reloc_result;
7e6d3809 UD	218
	219	/* Pointer to the version information if available. */
	220	ElfW(Versym) *l_versyms;
	221
	222	/* String specifying the path where this object was found. */
	223	const char *l_origin;
	224
	225	/* Start and finish of memory map for this object. l_map_start
	226	need not be the same as l_addr. */
	227	ElfW(Addr) l_map_start, l_map_end;
eec8b6ca UD	228	/* End of the executable part of the mapping. */
eec8b6ca UD	229	ElfW(Addr) l_text_end;
7e6d3809	230
b98e518f	231	/* Default array for 'l_scope'. */
c0a777e8	232	struct r_scope_elem *l_scope_mem[4];
b98e518f UD	233	/* Size of array allocated for 'l_scope'. */
b98e518f UD	234	size_t l_scope_max;
7e6d3809	235	/* This is an array defining the lookup scope for this link map.
c69136ae	236	There are initially at most three different scope lists. */
c0a777e8	237	struct r_scope_elem **l_scope;
7e6d3809 UD	238
	239	/* A similar array, this time only with the local scope. This is
	240	used occasionally. */
	241	struct r_scope_elem *l_local_scope[2];
	242
	243	/* This information is kept to check for sure whether a shared
	244	object is the same as one already loaded. */
c01ae97e	245	struct r_file_id l_file_id;
7e6d3809 UD	246
7e6d3809 UD	247	/* Collected information about own RUNPATH directories. */
f55727ca	248	struct r_search_path_struct l_runpath_dirs;
7e6d3809 UD	249
	250	/* List of object in order of the init and fini calls. */
	251	struct link_map **l_initfini;
	252
	253	/* List of the dependencies introduced through symbol binding. */
385b4cf4 UD	254	struct link_map_reldeps
	255	{
	256	unsigned int act;
	257	struct link_map *list[];
	258	} *l_reldeps;
2af63968 UD	259	unsigned int l_reldepsmax;
	260
	261	/* Nonzero if the DSO is used. */
	262	unsigned int l_used;
bf8b3e74 UD	263
	264	/* Various flag words. */
	265	ElfW(Word) l_feature_1;
	266	ElfW(Word) l_flags_1;
ec70c011	267	ElfW(Word) l_flags;
69c33254 UD	268
69c33254 UD	269	/* Temporarily used in `dl_close'. */
20fe49b9	270	int l_idx;
370f00c3 UD	271
370f00c3 UD	272	struct link_map_machine l_mach;
680254fe UD	273
	274	struct
	275	{
	276	const ElfW(Sym) *sym;
cf5a372e	277	int type_class;
680254fe	278	struct link_map *value;
680254fe UD	279	const ElfW(Sym) *ret;
680254fe UD	280	} l_lookup_cache;
5d6feea8 UD	281
	282	/* Thread-local storage related info. */
	283
5d6feea8 UD	284	/* Start of the initialization image. */
	285	void *l_tls_initimage;
	286	/* Size of the initialization image. */
	287	size_t l_tls_initimage_size;
	288	/* Size of the TLS block. */
	289	size_t l_tls_blocksize;
877e0d8e	290	/* Alignment requirement of the TLS block. */
3fb55878	291	size_t l_tls_align;
99fe3b0e UD	292	/* Offset of first byte module alignment. */
99fe3b0e UD	293	size_t l_tls_firstbyte_offset;
11bf311e UD	294	#ifndef NO_TLS_OFFSET
11bf311e UD	295	# define NO_TLS_OFFSET 0
4c533566 UD	296	#endif
	297	#ifndef FORCED_DYNAMIC_TLS_OFFSET
	298	# if NO_TLS_OFFSET == 0
67cbf9a2	299	# define FORCED_DYNAMIC_TLS_OFFSET -1
4c533566 UD	300	# elif NO_TLS_OFFSET == -1
	301	# define FORCED_DYNAMIC_TLS_OFFSET -2
	302	# else
	303	# error "FORCED_DYNAMIC_TLS_OFFSET is not defined"
	304	# endif
11bf311e	305	#endif
5d6feea8 UD	306	/* For objects present at startup time: offset in the static TLS block. */
	307	ptrdiff_t l_tls_offset;
	308	/* Index of the module in the dtv array. */
	309	size_t l_tls_modid;
ed20b3d9	310
90b37cac SP	311	/* Number of thread_local objects constructed by this DSO. This is
	312	atomically accessed and modified and is not always protected by the load
	313	lock. See also: CONCURRENCY NOTES in cxa_thread_atexit_impl.c. */
ba384f6e SP	314	size_t l_tls_dtor_count;
ba384f6e SP	315
ed20b3d9 UD	316	/* Information used to change permission after the relocations are
	317	done. */
	318	ElfW(Addr) l_relro_addr;
	319	size_t l_relro_size;
9dcafc55	320
b90395e6 UD	321	unsigned long long int l_serial;
b90395e6 UD	322
9dcafc55 UD	323	/* Audit information. This array apparent must be the last in the
	324	structure. Never add something after it. */
	325	struct auditstate
	326	{
	327	uintptr_t cookie;
	328	unsigned int bindflags;
	329	} l_audit[0];
	330	};
	331
9dcafc55 UD	332
	333	#if __ELF_NATIVE_CLASS == 32
	334	# define symbind symbind32
9dcafc55 UD	335	#elif __ELF_NATIVE_CLASS == 64
	336	# define symbind symbind64
	337	#else
	338	# error "__ELF_NATIVE_CLASS must be defined"
	339	#endif
	340
48ab1c2f UD	341	extern int __dl_iterate_phdr (int (callback) (struct dl_phdr_info info,
	342	size_t size, void *data),
	343	void *data);
	344
81b035fe L	345	/* We use this macro to refer to ELF macros independent of the native
	346	wordsize. `ELFW(R_TYPE)' is used in place of `ELF32_R_TYPE' or
	347	`ELF64_R_TYPE'. */
	348	#define ELFW(type) _ElfW (ELF, __ELF_NATIVE_CLASS, type)
	349
47755784	350	# endif /* !_ISOMAC */
d78efd9f	351	#endif /* include/link.h */