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* elf/dl-close.c: New file. * elf/link.h: Declare _dl_close. * elf/Makefile (routines): Add dl-close. * elf/dlclose.c (dlclose): Use _dl_close. * elf/Makefile ($(objpfx)librtld.so): Remove libelf from deps. * elf/dl-runtime.c (_dl_global_scope): New variable. (_dl_object_relocation_scope): New function. (fixup): Use it. * elf/rtld.c (dl_main): Use it. * elf/dl-open.c (_dl_open): Use it. If (MODE & RTLD_GLOBAL), set the l_global bit and append the new map to _dl_global_scope. * elf/link.h: Declare _dl_global_scope, _dl_global_scope_alloc, and _dl_object_relocation_scope. * elf/link.h (struct link_map): Add l_loader member. Remove _dl_map_object_from_fd decl. * elf/dl-load.c (_dl_map_object): Pass LOADER to ... (_dl_map_object_from_fd): Take new arg LOADER and set l_loader member. (_dl_map_object): Try DT_RPATH from all loaders up the chain. * elf/dl-object.c (_dl_loaded): Variable removed. (_dl_default_scope): New variable replaces it. * elf/link.h (_dl_loaded): Remove variable decl; instead define as macro for _dl_default_scope[2]. (_dl_default_scope): Declare it. * sysdeps/i386/dl-machine.h (RTLD_START): Use _dl_default_scope[2] instead of _dl_loaded. * sysdeps/m68k/dl-machine.h (RTLD_START): Likewise. * elf/rtld.c (dl_main): Use _dl_default_scope for symbol lookups. * elf/dl-reloc.c (_dl_relocate_object): Remove check for _dl_rtld_map. * elf/rtld.c (dl_main): Pass 0 for LAZY flag when re-relocating self. * elf/link.h (struct link_map.l_type): Remove lt_interpreter. (struct link_map): Add new flag member l_global. * elf/dl-reloc.c (_dl_relocate_object): Check for _dl_rtld_map directly instead of looking for lt_interpreter. * sysdeps/i386/dl-machine.h (elf_machine_rel): Likewise. * elf/rtld.c (_dl_start): Don't bother setting BOOTSTRAP_MAP.l_type. (dl_main): Set _dl_rtld_map.l_type to lt_library. * elf/dl-deps.c (_dl_map_object_deps): Propagate MAP->l_type to dependencies loaded, downgrading lt_executable -> lt_library. * elf/dl-load.c (_dl_map_object_from_fd): Take new arg TYPE and set l_type from that, translating lt_library->lt_executable based on the file's ELF type. (_dl_map_object): Likewise. * elf/link.h: Update prototypes. * elf/dl-open.c: Pass type lt_loaded. * elf/rtld.c: Pass type lt_library. * elf/dl-load.c (_dl_map_object_from_fd): Handle null return from _dl_new_object. (_dl_map_object_from_fd: lose): Unchain and free L if it's not null. Free REALNAME, and just use NAME in error message. * elf/dl-object.c (_dl_new_object): If malloc fails, return null instead of calling _dl_signal_error. * elf/dl-load.c (_dl_map_object_from_fd): Close FD before signalling error for _dl_zerofd setup failure. * elf/dl-object.c (_dl_startup_loaded): Variable removed. * elf/link.h: Remove its decl. * elf/dl-reloc.c (_dl_relocate_object): Take new SCOPE arg and pass it through to _dl_lookup_symbol. * elf/link.h (_dl_relocate_object): Update comment and prototype. * elf/rtld.c (dl_main): Pass scope vector to _dl_relocate_object. * elf/dl-lookup.c (_dl_lookup_symbol): Arg SYMBOL_SCOPE is now a null-terminated vector of pointers, no longer a vector of exactly two. * elf/link.h (_dl_lookup_symbol): Update comment and prototype. * elf/dl-runtime.c (fixup): Set up scope for symbol lookup properly as done in _dl_relocate_object. * elf/dlopen.c: Pass "" to _dl_open when FILE is null.
102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
/* Load the dependencies of a mapped object.
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Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library 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 GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <link.h>
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#include <errno.h>
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#include <dlfcn.h>
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#include <stdlib.h>
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void
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_dl_map_object_deps (struct link_map *map)
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{
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struct list
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{
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struct link_map *map;
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struct list *next;
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};
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struct list head, *tailp, *scanp;
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unsigned int nlist;
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/* Start the search list with one element: MAP itself. */
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head.map = map;
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head.next = NULL;
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nlist = 1;
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/* Process each element of the search list, loading each of its immediate
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dependencies and appending them to the list as we step through it.
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This produces a flat, ordered list that represents a breadth-first
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search of the dependency tree. */
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for (scanp = tailp = &head; scanp; scanp = scanp->next)
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{
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struct link_map *l = scanp->map;
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/* We use `l_reserved' as a mark bit to detect objects we have
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already put in the search list and avoid adding duplicate elements
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later in the list. */
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l->l_reserved = 1;
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if (l->l_info[DT_NEEDED])
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{
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const char *strtab
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= ((void *) l->l_addr + l->l_info[DT_STRTAB]->d_un.d_ptr);
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const ElfW(Dyn) *d;
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for (d = l->l_ld; d->d_tag != DT_NULL; ++d)
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if (d->d_tag == DT_NEEDED)
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{
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/* Map in the needed object. */
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struct link_map *dep
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= _dl_map_object (l, strtab + d->d_un.d_val,
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l->l_type == lt_executable ? lt_library :
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l->l_type);
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if (dep->l_reserved)
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/* This object is already in the search list we are
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building. Don't add a duplicate pointer. Release the
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reference just added by _dl_map_object. */
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--dep->l_opencount;
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else
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{
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/* Append DEP to the search list. */
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tailp->next = alloca (sizeof *tailp);
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tailp = tailp->next;
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tailp->map = dep;
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tailp->next = NULL;
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++nlist;
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}
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}
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}
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}
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/* Store the search list we built in the object. It will be used for
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searches in the scope of this object. */
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map->l_searchlist = malloc (nlist * sizeof (struct link_map *));
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map->l_nsearchlist = nlist;
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nlist = 0;
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for (scanp = &head; scanp; scanp = scanp->next)
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{
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map->l_searchlist[nlist++] = scanp->map;
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/* Now clear all the mark bits we set in the objects on the search list
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to avoid duplicates, so the next call starts fresh. */
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scanp->map->l_reserved = 0;
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}
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}
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