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Diffstat (limited to 'newlib/libc/sys/linux/include/link.h')
| -rw-r--r-- | newlib/libc/sys/linux/include/link.h | 269 |
1 files changed, 0 insertions, 269 deletions
diff --git a/newlib/libc/sys/linux/include/link.h b/newlib/libc/sys/linux/include/link.h deleted file mode 100644 index 424fb2952..000000000 --- a/newlib/libc/sys/linux/include/link.h +++ /dev/null @@ -1,269 +0,0 @@ -/* Data structure for communication from the run-time dynamic linker for - loaded ELF shared objects. - Copyright (C) 1995-1999, 2000, 2001 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, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#ifndef _LINK_H -#define _LINK_H 1 - -#include <features.h> -#include <elf.h> -#include <dlfcn.h> -#include <sys/types.h> - -#define DT_THISPROCNUM 0 -/* We use this macro to refer to ELF types independent of the native wordsize. - `ElfW(TYPE)' is used in place of `Elf32_TYPE' or `Elf64_TYPE'. */ -#define ElfW(type) _ElfW (Elf, __ELF_NATIVE_CLASS, type) -#define _ElfW(e,w,t) _ElfW_1 (e, w, _##t) -#define _ElfW_1(e,w,t) e##w##t - -#include <sys/elfclass.h> /* Defines __ELF_NATIVE_CLASS. */ -#include <sys/link.h> -#include <dl-lookupcfg.h> - -/* Rendezvous structure used by the run-time dynamic linker to communicate - details of shared object loading to the debugger. If the executable's - dynamic section has a DT_DEBUG element, the run-time linker sets that - element's value to the address where this structure can be found. */ - -struct r_debug - { - int r_version; /* Version number for this protocol. */ - - struct link_map *r_map; /* Head of the chain of loaded objects. */ - - /* This is the address of a function internal to the run-time linker, - that will always be called when the linker begins to map in a - library or unmap it, and again when the mapping change is complete. - The debugger can set a breakpoint at this address if it wants to - notice shared object mapping changes. */ - ElfW(Addr) r_brk; - enum - { - /* This state value describes the mapping change taking place when - the `r_brk' address is called. */ - RT_CONSISTENT, /* Mapping change is complete. */ - RT_ADD, /* Beginning to add a new object. */ - RT_DELETE /* Beginning to remove an object mapping. */ - } r_state; - - ElfW(Addr) r_ldbase; /* Base address the linker is loaded at. */ - }; - -/* This is the instance of that structure used by the dynamic linker. */ -extern struct r_debug _r_debug; - -/* This symbol refers to the "dynamic structure" in the `.dynamic' section - of whatever module refers to `_DYNAMIC'. So, to find its own - `struct r_debug', a program could do: - for (dyn = _DYNAMIC; dyn->d_tag != DT_NULL; ++dyn) - if (dyn->d_tag == DT_DEBUG) - r_debug = (struct r_debug *) dyn->d_un.d_ptr; - */ -extern ElfW(Dyn) _DYNAMIC[]; - - -/* 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; /* Base address shared object is loaded at. */ - 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. */ - - 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_EXTRANUM) are indexed - by DT_EXTRATAGIDX(tagvalue) and - [DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM, - DT_NUM+DT_THISPROCNUM+DT_VERSIONTAGNUM+DT_EXTRANUM) - are indexed by DT_EXTRATAGIDX(tagvalue) (see <elf.h>). */ - - ElfW(Dyn) *l_info[DT_NUM + DT_THISPROCNUM + DT_VERSIONTAGNUM - + DT_EXTRANUM]; - 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; - - /* Symbol hash table. */ - Elf_Symndx l_nbuckets; - const Elf_Symndx *l_buckets, *l_chain; - - unsigned int l_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. */ - - /* Array with version names. */ - unsigned int l_nversions; - struct r_found_version *l_versions; - - /* Collected information about own RPATH directories. */ - struct r_search_path_struct l_rpath_dirs; - - /* Collected results of relocation while profiling. */ - ElfW(Addr) *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; - - /* 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 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. */ - dev_t l_dev; - ino64_t l_ino; - - /* 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. */ - unsigned int l_reldepsmax; - unsigned int l_reldepsact; - struct link_map **l_reldeps; - - /* Various flag words. */ - ElfW(Word) l_feature_1; - ElfW(Word) l_flags_1; - - /* Temporarily used in `dl_close'. */ - unsigned int l_idx; - - struct link_map_machine l_mach; - - struct - { - const ElfW(Sym) *sym; - int type_class; -#ifdef DL_LOOKUP_RETURNS_MAP - struct link_map *value; -#else - ElfW(Addr) value; -#endif - const ElfW(Sym) *ret; - } l_lookup_cache; - }; - -struct dl_phdr_info - { - ElfW(Addr) dlpi_addr; - const char *dlpi_name; - const ElfW(Phdr) *dlpi_phdr; - ElfW(Half) dlpi_phnum; - }; - -extern int dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info, - size_t size, void *data), - void *data); -extern int __dl_iterate_phdr (int (*callback) (struct dl_phdr_info *info, - size_t size, void *data), - void *data); - -#endif /* link.h */ |