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/* Load a shared object at run time.
Copyright (C) 1995-2019 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
<https://www.gnu.org/licenses/>. */
#include <dlfcn.h>
#include <errno.h>
#include <libintl.h>
#include <stddef.h>
#include <unistd.h>
#include <ldsodefs.h>
#if !defined SHARED && IS_IN (libdl)
void *
dlmopen (Lmid_t nsid, const char *file, int mode)
{
return __dlmopen (nsid, file, mode, RETURN_ADDRESS (0));
}
static_link_warning (dlmopen)
#else
struct dlmopen_args
{
/* Namespace ID. */
Lmid_t nsid;
/* The arguments for dlopen_doit. */
const char *file;
int mode;
/* The return value of dlopen_doit. */
void *new;
/* Address of the caller. */
const void *caller;
};
static void
dlmopen_doit (void *a)
{
struct dlmopen_args *args = (struct dlmopen_args *) a;
/* Non-shared code has no support for multiple namespaces. */
if (args->nsid != LM_ID_BASE)
{
# ifdef SHARED
/* If trying to open the link map for the main executable the namespace
must be the main one. */
if (args->file == NULL)
# endif
_dl_signal_error (EINVAL, NULL, NULL, N_("invalid namespace"));
/* It makes no sense to use RTLD_GLOBAL when loading a DSO into
a namespace other than the base namespace. */
if (__glibc_unlikely (args->mode & RTLD_GLOBAL))
_dl_signal_error (EINVAL, NULL, NULL, N_("invalid mode"));
}
args->new = GLRO(dl_open) (args->file ?: "", args->mode | __RTLD_DLOPEN,
args->caller,
args->nsid, __dlfcn_argc, __dlfcn_argv,
__environ);
}
void *
__dlmopen (Lmid_t nsid, const char *file, int mode DL_CALLER_DECL)
{
# ifdef SHARED
if (!rtld_active ())
return _dlfcn_hook->dlmopen (nsid, file, mode, RETURN_ADDRESS (0));
# endif
struct dlmopen_args args;
args.nsid = nsid;
args.file = file;
args.mode = mode;
args.caller = DL_CALLER;
# ifdef SHARED
return _dlerror_run (dlmopen_doit, &args) ? NULL : args.new;
# else
if (_dlerror_run (dlmopen_doit, &args))
return NULL;
__libc_register_dl_open_hook ((struct link_map *) args.new);
__libc_register_dlfcn_hook ((struct link_map *) args.new);
return args.new;
# endif
}
# ifdef SHARED
strong_alias (__dlmopen, dlmopen)
# endif
#endif
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