147 lines
4.7 KiB
C
147 lines
4.7 KiB
C
/* Support for dynamic linking code in static libc.
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Copyright (C) 1996,97,98,99,2000 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 not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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/* This file defines some things that for the dynamic linker are defined in
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rtld.c and dl-sysdep.c in ways appropriate to bootstrap dynamic linking. */
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#include <errno.h>
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#include <libintl.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <ldsodefs.h>
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#include <dl-machine.h>
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#include <bits/libc-lock.h>
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extern char *__progname;
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char **_dl_argv = &__progname; /* This is checked for some error messages. */
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/* Name of the architecture. */
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const char *_dl_platform;
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size_t _dl_platformlen;
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int _dl_debug_libs;
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int _dl_debug_impcalls;
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int _dl_debug_bindings;
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int _dl_debug_symbols;
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int _dl_debug_versions;
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int _dl_debug_reloc;
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int _dl_debug_files;
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int _dl_lazy;
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int _dl_dynamic_weak;
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/* If nonzero print warnings about problematic situations. */
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int _dl_verbose;
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/* Structure to store information about search paths. */
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struct r_search_path *_dl_search_paths;
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/* We never do profiling. */
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const char *_dl_profile;
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/* Names of shared object for which the RUNPATHs and RPATHs should be
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ignored. */
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const char *_dl_inhibit_rpath;
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/* The map for the object we will profile. */
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struct link_map *_dl_profile_map;
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/* This is the address of the last stack address ever used. */
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void *__libc_stack_end;
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/* Path where the binary is found. */
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const char *_dl_origin_path;
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/* Nonzero if runtime lookup should not update the .got/.plt. */
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int _dl_bind_not;
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/* Initially empty list of loaded objects. */
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struct link_map *_dl_loaded;
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/* Fake scope. In dynamically linked binaries this is the scope of the
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main application but here we don't have something like this. So
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create a fake scope containing nothing. */
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struct r_scope_elem _dl_initial_searchlist;
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/* Variable which can be used in lookup to process the global scope. */
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struct r_scope_elem *_dl_global_scope[2] = { &_dl_initial_searchlist, NULL };
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/* This is a global pointer to this structure which is public. It is
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used by dlopen/dlclose to add and remove objects from what is regarded
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to be the global scope. */
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struct r_scope_elem *_dl_main_searchlist = &_dl_initial_searchlist;
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/* Nonzero during startup. */
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int _dl_starting_up = 1;
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/* During the program run we must not modify the global data of
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loaded shared object simultanously in two threads. Therefore we
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protect `_dl_open' and `_dl_close' in dl-close.c.
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This must be a recursive lock since the initializer function of
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the loaded object might as well require a call to this function.
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At this time it is not anymore a problem to modify the tables. */
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__libc_lock_define_initialized_recursive (, _dl_load_lock)
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static void non_dynamic_init (void) __attribute__ ((unused));
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static void
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non_dynamic_init (void)
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{
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_dl_verbose = *(getenv ("LD_WARN") ?: "") == '\0' ? 0 : 1;
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_dl_pagesize = __getpagesize ();
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/* Initialize the data structures for the search paths for shared
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objects. */
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_dl_init_paths (getenv ("LD_LIBRARY_PATH"));
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_dl_lazy = *(getenv ("LD_BIND_NOW") ?: "") == '\0';
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_dl_bind_not = *(getenv ("LD_BIND_NOT") ?: "") != '\0';
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_dl_dynamic_weak = *(getenv ("LD_DYNAMIC_WEAK") ?: "") == '\0';
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#ifdef DL_PLATFORM_INIT
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DL_PLATFORM_INIT;
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#endif
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/* Now determine the length of the platform string. */
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if (_dl_platform != NULL)
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_dl_platformlen = strlen (_dl_platform);
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}
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text_set_element (__libc_subinit, non_dynamic_init);
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const struct r_strlenpair *
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internal_function
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_dl_important_hwcaps (const char *platform, size_t platform_len, size_t *sz,
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size_t *max_capstrlen)
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{
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struct r_strlenpair *result;
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/* XXX We don't try to find the capabilities in this case. */
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result = (struct r_strlenpair *) malloc (sizeof (*result));
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if (result == NULL)
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_dl_signal_error (ENOMEM, NULL, N_("cannot create capability list"));
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result[0].str = (char *) result; /* Does not really matter. */
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result[0].len = 0;
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*sz = 1;
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return result;
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}
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