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/* Copyright (C) 2010 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
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/>. */
/* Note: linking in vDSO to a static binary requires changes to
the main GLIBC proper. Not yet implemented. */
#ifdef SHARED
#include <dl-vdso.h>
#include <bits/m68k-vdso.h>
static inline void
_libc_vdso_platform_setup (void)
{
void *p;
PREPARE_VERSION (linux26, "LINUX_2.6", 61765110);
/* It may happen that rtld didn't initialize the vDSO, so fallback
to the syscall implementations if _dl_vdso_vsym returns NULL.
This may happen when a static executable dlopen's a dynamic library.
This really is nothing more than a workaround for rtld/csu
deficiency. Ideally, init code would setup the vDSO for static
binaries too. */
p = _dl_vdso_vsym ("__kernel_read_tp", &linux26);
if (p != NULL)
{
__vdso_read_tp = p;
__rtld___vdso_read_tp = p;
}
else
assert (__vdso_read_tp == (void *) __vdso_read_tp_stub);
p = _dl_vdso_vsym ("__kernel_atomic_cmpxchg_32", &linux26);
if (p != NULL)
{
__vdso_atomic_cmpxchg_32 = p;
__rtld___vdso_atomic_cmpxchg_32 = p;
}
else
assert (__vdso_atomic_cmpxchg_32
== (void *) __vdso_atomic_cmpxchg_32_stub);
p = _dl_vdso_vsym ("__kernel_atomic_barrier", &linux26);
if (p != NULL)
{
__vdso_atomic_barrier = p;
__rtld___vdso_atomic_barrier = p;
}
else
assert (__vdso_atomic_barrier == (void *) __vdso_atomic_barrier_stub);
}
#define VDSO_SETUP _libc_vdso_platform_setup
#endif /* SHARED */
#include <sysdeps/unix/sysv/linux/init-first.c>
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