diff options
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/m68k/init-first.c')
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/m68k/init-first.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/m68k/init-first.c b/ports/sysdeps/unix/sysv/linux/m68k/init-first.c new file mode 100644 index 0000000000..ec311ec427 --- /dev/null +++ b/ports/sysdeps/unix/sysv/linux/m68k/init-first.c @@ -0,0 +1,73 @@ +/* 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> |