mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-14 09:01:07 +00:00
9b42a0b3a3
Replace with IS_IN (libdl). No changes to generated code on x86_64. * dlfcn/dladdr.c: Use IS_IN. * dlfcn/dladdr1.c: Likewise. * dlfcn/dlclose.c: Likewise. * dlfcn/dlerror.c: Likewise. * dlfcn/dlinfo.c: Likewise. * dlfcn/dlmopen.c: Likewise. * dlfcn/dlopen.c: Likewise. * dlfcn/dlsym.c: Likewise. * dlfcn/dlvsym.c: Likewise.
80 lines
1.9 KiB
C
80 lines
1.9 KiB
C
/* Look up a symbol in a shared object loaded by `dlopen'.
|
|
Copyright (C) 1995-2014 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
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#include <dlfcn.h>
|
|
#include <stddef.h>
|
|
|
|
#include <ldsodefs.h>
|
|
|
|
#if !defined SHARED && IS_IN (libdl)
|
|
|
|
void *
|
|
dlsym (void *handle, const char *name)
|
|
{
|
|
return __dlsym (handle, name, RETURN_ADDRESS (0));
|
|
}
|
|
|
|
#else
|
|
|
|
struct dlsym_args
|
|
{
|
|
/* The arguments to dlsym_doit. */
|
|
void *handle;
|
|
const char *name;
|
|
void *who;
|
|
|
|
/* The return value of dlsym_doit. */
|
|
void *sym;
|
|
};
|
|
|
|
static void
|
|
dlsym_doit (void *a)
|
|
{
|
|
struct dlsym_args *args = (struct dlsym_args *) a;
|
|
|
|
args->sym = _dl_sym (args->handle, args->name, args->who);
|
|
}
|
|
|
|
|
|
void *
|
|
__dlsym (void *handle, const char *name DL_CALLER_DECL)
|
|
{
|
|
# ifdef SHARED
|
|
if (__glibc_unlikely (_dlfcn_hook != NULL))
|
|
return _dlfcn_hook->dlsym (handle, name, DL_CALLER);
|
|
# endif
|
|
|
|
struct dlsym_args args;
|
|
args.who = DL_CALLER;
|
|
args.handle = handle;
|
|
args.name = name;
|
|
|
|
/* Protect against concurrent loads and unloads. */
|
|
__rtld_lock_lock_recursive (GL(dl_load_lock));
|
|
|
|
void *result = (_dlerror_run (dlsym_doit, &args) ? NULL : args.sym);
|
|
|
|
__rtld_lock_unlock_recursive (GL(dl_load_lock));
|
|
|
|
return result;
|
|
}
|
|
# ifdef SHARED
|
|
strong_alias (__dlsym, dlsym)
|
|
# endif
|
|
#endif
|