| /* Initialization code run first thing by the ELF startup code. Linux/m68k. |
| Copyright (C) 2010-2014 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 <csu/init-first.c> |
