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