projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 93c65d43 | 1 | /* Initialization code run first thing by the ELF startup code. Linux/m68k. |
| d4697bc9 | 2 | Copyright (C) 2010-2014 Free Software Foundation, Inc. |
| 40111cb9 MK |
3 | This file is part of the GNU C Library. |
| 4 | Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010. | |
| 5 | ||
| 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. | |
| 10 | ||
| 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. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public | |
| ab84e3ff PE |
17 | License along with the GNU C Library. If not, see |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 40111cb9 MK |
19 | |
| 20 | /* Note: linking in vDSO to a static binary requires changes to | |
| 21 | the main GLIBC proper. Not yet implemented. */ | |
| 22 | #ifdef SHARED | |
| 23 | ||
| 24 | #include <dl-vdso.h> | |
| 25 | #include <bits/m68k-vdso.h> | |
| 26 | ||
| 27 | static inline void | |
| 28 | _libc_vdso_platform_setup (void) | |
| 29 | { | |
| 30 | void *p; | |
| 31 | ||
| 32 | PREPARE_VERSION (linux26, "LINUX_2.6", 61765110); | |
| 33 | ||
| 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 | |
| 39 | binaries too. */ | |
| 40 | ||
| 41 | p = _dl_vdso_vsym ("__kernel_read_tp", &linux26); | |
| 42 | if (p != NULL) | |
| 43 | { | |
| 44 | __vdso_read_tp = p; | |
| 45 | __rtld___vdso_read_tp = p; | |
| 46 | } | |
| 47 | else | |
| 48 | assert (__vdso_read_tp == (void *) __vdso_read_tp_stub); | |
| 49 | ||
| 50 | p = _dl_vdso_vsym ("__kernel_atomic_cmpxchg_32", &linux26); | |
| 51 | if (p != NULL) | |
| 52 | { | |
| 53 | __vdso_atomic_cmpxchg_32 = p; | |
| 54 | __rtld___vdso_atomic_cmpxchg_32 = p; | |
| 55 | } | |
| 56 | else | |
| 57 | assert (__vdso_atomic_cmpxchg_32 | |
| 58 | == (void *) __vdso_atomic_cmpxchg_32_stub); | |
| 59 | ||
| 60 | p = _dl_vdso_vsym ("__kernel_atomic_barrier", &linux26); | |
| 61 | if (p != NULL) | |
| 62 | { | |
| 63 | __vdso_atomic_barrier = p; | |
| 64 | __rtld___vdso_atomic_barrier = p; | |
| 65 | } | |
| 66 | else | |
| 67 | assert (__vdso_atomic_barrier == (void *) __vdso_atomic_barrier_stub); | |
| 68 | } | |
| 69 | ||
| 70 | #define VDSO_SETUP _libc_vdso_platform_setup | |
| 71 | ||
| 72 | #endif /* SHARED */ | |
| 73 | ||
| 93c65d43 | 74 | #include <csu/init-first.c> |