| /* This file is part of the GNU C Library. |
| Copyright (C) 2013-2018 Free Software Foundation, Inc. |
| |
| 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/>. */ |
| |
| #include <ldsodefs.h> |
| |
| /* The code checks if _rtld_global_ro was realocated before trying to access |
| the dl_hwcap field. The assembly is to make the compiler not optimize the |
| test (&_rtld_global_ro != NULL), which is always true in ISO C (but not |
| in that case since _rtld_global_ro might not been realocated yet). */ |
| #if defined(SHARED) && !IS_IN (rtld) |
| # define __GLRO(value) \ |
| ({ volatile void **__p = (volatile void**)(&_rtld_global_ro); \ |
| unsigned long int __ret; \ |
| asm ("# x in %0" : "+r" (__p)); \ |
| __ret = (__p) ? GLRO(value) : 0; \ |
| __ret; }) |
| #else |
| # define __GLRO(value) GLRO(value) |
| #endif |
| |
| /* dl_hwcap contains only the latest supported ISA, the macro checks which is |
| and fills the previous ones. */ |
| #define INIT_ARCH() \ |
| unsigned long int hwcap = __GLRO(dl_hwcap); \ |
| unsigned long int __attribute__((unused)) hwcap2 = __GLRO(dl_hwcap2); \ |
| bool __attribute__((unused)) use_cached_memopt = \ |
| GLRO(dl_powerpc_cpu_features).use_cached_memopt; \ |
| if (hwcap & PPC_FEATURE_ARCH_2_06) \ |
| hwcap |= PPC_FEATURE_ARCH_2_05 | \ |
| PPC_FEATURE_POWER5_PLUS | \ |
| PPC_FEATURE_POWER5 | \ |
| PPC_FEATURE_POWER4; \ |
| else if (hwcap & PPC_FEATURE_ARCH_2_05) \ |
| hwcap |= PPC_FEATURE_POWER5_PLUS | \ |
| PPC_FEATURE_POWER5 | \ |
| PPC_FEATURE_POWER4; \ |
| else if (hwcap & PPC_FEATURE_POWER5_PLUS) \ |
| hwcap |= PPC_FEATURE_POWER5 | \ |
| PPC_FEATURE_POWER4; \ |
| else if (hwcap & PPC_FEATURE_POWER5) \ |
| hwcap |= PPC_FEATURE_POWER4; |
