1 /* Initialization code run first thing by the ELF startup code. Linux/m68k.
2 Copyright (C) 2010-2013 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library. If not, see
18 <http://www.gnu.org/licenses/>. */
20 /* Note: linking in vDSO to a static binary requires changes to
21 the main GLIBC proper. Not yet implemented. */
25 #include <bits/m68k-vdso.h>
28 _libc_vdso_platform_setup (void)
32 PREPARE_VERSION (linux26
, "LINUX_2.6", 61765110);
34 /* It may happen that rtld didn't initialize the vDSO, so fallback
35 to the syscall implementations if _dl_vdso_vsym returns NULL.
36 This may happen when a static executable dlopen's a dynamic library.
37 This really is nothing more than a workaround for rtld/csu
38 deficiency. Ideally, init code would setup the vDSO for static
41 p
= _dl_vdso_vsym ("__kernel_read_tp", &linux26
);
45 __rtld___vdso_read_tp
= p
;
48 assert (__vdso_read_tp
== (void *) __vdso_read_tp_stub
);
50 p
= _dl_vdso_vsym ("__kernel_atomic_cmpxchg_32", &linux26
);
53 __vdso_atomic_cmpxchg_32
= p
;
54 __rtld___vdso_atomic_cmpxchg_32
= p
;
57 assert (__vdso_atomic_cmpxchg_32
58 == (void *) __vdso_atomic_cmpxchg_32_stub
);
60 p
= _dl_vdso_vsym ("__kernel_atomic_barrier", &linux26
);
63 __vdso_atomic_barrier
= p
;
64 __rtld___vdso_atomic_barrier
= p
;
67 assert (__vdso_atomic_barrier
== (void *) __vdso_atomic_barrier_stub
);
70 #define VDSO_SETUP _libc_vdso_platform_setup
74 #include <csu/init-first.c>