mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-28 23:34:53 +03:00
85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/* Variable initialization. M68K version.
|
|
Copyright (C) 2013-2014 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 <ldsodefs.h>
|
|
|
|
#ifdef SHARED
|
|
|
|
void
|
|
_dl_var_init (void *array[])
|
|
{
|
|
/* It has to match "variables" below. */
|
|
enum
|
|
{
|
|
DL_PAGESIZE = 0,
|
|
};
|
|
|
|
GLRO(dl_pagesize) = *(size_t *) array[DL_PAGESIZE];
|
|
}
|
|
|
|
#else
|
|
|
|
static void *variables[] =
|
|
{
|
|
&GLRO(dl_pagesize)
|
|
};
|
|
|
|
static void
|
|
_dl_unprotect_relro (struct link_map *l)
|
|
{
|
|
ElfW(Addr) start = ((l->l_addr + l->l_relro_addr)
|
|
& ~(GLRO(dl_pagesize) - 1));
|
|
ElfW(Addr) end = ((l->l_addr + l->l_relro_addr + l->l_relro_size)
|
|
& ~(GLRO(dl_pagesize) - 1));
|
|
|
|
if (start != end)
|
|
__mprotect ((void *) start, end - start, PROT_READ | PROT_WRITE);
|
|
}
|
|
|
|
void
|
|
_dl_static_init (struct link_map *l)
|
|
{
|
|
struct link_map *rtld_map = l;
|
|
struct r_scope_elem **scope;
|
|
const ElfW(Sym) *ref = NULL;
|
|
lookup_t loadbase;
|
|
void (*f) (void *[]);
|
|
size_t i;
|
|
|
|
loadbase = _dl_lookup_symbol_x ("_dl_var_init", l, &ref, l->l_local_scope,
|
|
NULL, 0, 1, NULL);
|
|
|
|
for (scope = l->l_local_scope; *scope != NULL; scope++)
|
|
for (i = 0; i < (*scope)->r_nlist; i++)
|
|
if ((*scope)->r_list[i] == loadbase)
|
|
{
|
|
rtld_map = (*scope)->r_list[i];
|
|
break;
|
|
}
|
|
|
|
if (ref != NULL)
|
|
{
|
|
f = (void (*) (void *[])) DL_SYMBOL_ADDRESS (loadbase, ref);
|
|
_dl_unprotect_relro (rtld_map);
|
|
f (variables);
|
|
_dl_protect_relro (rtld_map);
|
|
}
|
|
}
|
|
|
|
#endif
|