122 lines
3.0 KiB
C
122 lines
3.0 KiB
C
/* dlinfo -- Get information from the dynamic linker.
|
|
Copyright (C) 2003-2022 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 <link.h>
|
|
#include <ldsodefs.h>
|
|
#include <libintl.h>
|
|
#include <dl-tls.h>
|
|
#include <shlib-compat.h>
|
|
|
|
struct dlinfo_args
|
|
{
|
|
void *handle;
|
|
int request;
|
|
void *arg;
|
|
|
|
/* This is the value that is returned from dlinfo if no error is
|
|
signaled. */
|
|
int result;
|
|
};
|
|
|
|
static void
|
|
dlinfo_doit (void *argsblock)
|
|
{
|
|
struct dlinfo_args *const args = argsblock;
|
|
struct link_map *l = args->handle;
|
|
|
|
switch (args->request)
|
|
{
|
|
case RTLD_DI_CONFIGADDR:
|
|
default:
|
|
args->result = -1;
|
|
_dl_signal_error (0, NULL, NULL, N_("unsupported dlinfo request"));
|
|
break;
|
|
|
|
case RTLD_DI_LMID:
|
|
*(Lmid_t *) args->arg = l->l_ns;
|
|
break;
|
|
|
|
case RTLD_DI_LINKMAP:
|
|
*(struct link_map **) args->arg = l;
|
|
break;
|
|
|
|
case RTLD_DI_SERINFO:
|
|
_dl_rtld_di_serinfo (l, args->arg, false);
|
|
break;
|
|
case RTLD_DI_SERINFOSIZE:
|
|
_dl_rtld_di_serinfo (l, args->arg, true);
|
|
break;
|
|
|
|
case RTLD_DI_ORIGIN:
|
|
strcpy (args->arg, l->l_origin);
|
|
break;
|
|
|
|
case RTLD_DI_TLS_MODID:
|
|
*(size_t *) args->arg = 0;
|
|
*(size_t *) args->arg = l->l_tls_modid;
|
|
break;
|
|
|
|
case RTLD_DI_TLS_DATA:
|
|
{
|
|
void *data = NULL;
|
|
if (l->l_tls_modid != 0)
|
|
data = GLRO(dl_tls_get_addr_soft) (l);
|
|
*(void **) args->arg = data;
|
|
break;
|
|
}
|
|
|
|
case RTLD_DI_PHDR:
|
|
*(const ElfW(Phdr) **) args->arg = l->l_phdr;
|
|
args->result = l->l_phnum;
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int
|
|
dlinfo_implementation (void *handle, int request, void *arg)
|
|
{
|
|
struct dlinfo_args args = { handle, request, arg };
|
|
_dlerror_run (&dlinfo_doit, &args);
|
|
return args.result;
|
|
}
|
|
|
|
#ifdef SHARED
|
|
int
|
|
___dlinfo (void *handle, int request, void *arg)
|
|
{
|
|
if (GLRO (dl_dlfcn_hook) != NULL)
|
|
return GLRO (dl_dlfcn_hook)->dlinfo (handle, request, arg);
|
|
else
|
|
return dlinfo_implementation (handle, request, arg);
|
|
}
|
|
versioned_symbol (libc, ___dlinfo, dlinfo, GLIBC_2_34);
|
|
|
|
# if OTHER_SHLIB_COMPAT (libdl, GLIBC_2_3_3, GLIBC_2_34)
|
|
compat_symbol (libc, ___dlinfo, dlinfo, GLIBC_2_3_3);
|
|
# endif
|
|
#else /* !SHARED */
|
|
/* Also used with _dlfcn_hook. */
|
|
int
|
|
__dlinfo (void *handle, int request, void *arg)
|
|
{
|
|
return dlinfo_implementation (handle, request, arg);
|
|
}
|
|
weak_alias (__dlinfo, dlinfo)
|
|
#endif
|