From 425ce2edb9d11cc1ff650fac16dfbc450241896a Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Fri, 13 Mar 2009 23:53:18 +0000 Subject: * config.h.in (USE_MULTIARCH): Define. * configure.in: Handle --enable-multi-arch. * elf/dl-runtime.c (_dl_fixup): Handle STT_GNU_IFUNC. (_dl_fixup_profile): Likewise. * elf/do-lookup.c (dl_lookup_x): Likewise. * sysdeps/x86_64/dl-machine.h: Handle STT_GNU_IFUNC. * elf/elf.h (STT_GNU_IFUNC): Define. * include/libc-symbols.h (libc_ifunc): Define. * sysdeps/x86_64/cacheinfo.c: If USE_MULTIARCH is defined, use the framework in init-arch.h to get CPUID values. * sysdeps/x86_64/multiarch/Makefile: New file. * sysdeps/x86_64/multiarch/init-arch.c: New file. * sysdeps/x86_64/multiarch/init-arch.h: New file. * sysdeps/x86_64/multiarch/sched_cpucount.c: New file. * config.make.in (experimental-malloc): Define. * configure.in: Handle --enable-experimental-malloc. * malloc/Makefile: Handle experimental-malloc flag. * malloc/malloc.c: Implement PER_THREAD and ATOMIC_FASTBINS features. * malloc/arena.c: Likewise. * malloc/hooks.c: Likewise. * malloc/malloc.h: Define M_ARENA_TEST and M_ARENA_MAX. --- sysdeps/x86_64/multiarch/init-arch.c | 65 ++++++++++++++++++++++++++++++++++++ 1 file changed, 65 insertions(+) create mode 100644 sysdeps/x86_64/multiarch/init-arch.c (limited to 'sysdeps/x86_64/multiarch/init-arch.c') diff --git a/sysdeps/x86_64/multiarch/init-arch.c b/sysdeps/x86_64/multiarch/init-arch.c new file mode 100644 index 0000000..eb4365f --- /dev/null +++ b/sysdeps/x86_64/multiarch/init-arch.c @@ -0,0 +1,65 @@ +/* Initialize CPU feature data. + This file is part of the GNU C Library. + Copyright (C) 2008 Free Software Foundation, Inc. + Contributed by Ulrich Drepper . + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include "init-arch.h" + + +struct cpu_features __cpu_features attribute_hidden; + + +void +__init_cpu_features (void) +{ + unsigned int ebx; + unsigned int ecx; + unsigned int edx; + + asm volatile ("cpuid" + : "=a" (__cpu_features.max_cpuid), "=b" (ebx), "=c" (ecx), + "=d" (edx) + : "0" (0)); + + /* This spells out "GenuineIntel". */ + if (ebx == 0x756e6547 && ecx == 0x6c65746e && edx == 0x49656e69) + { + __cpu_features.kind = arch_kind_intel; + + asm volatile ("cpuid" + : "=a" (__cpu_features.cpuid[INTEL_CPUID_INDEX_1].eax), + "=b" (__cpu_features.cpuid[INTEL_CPUID_INDEX_1].ebx), + "=c" (__cpu_features.cpuid[INTEL_CPUID_INDEX_1].ecx), + "=d" (__cpu_features.cpuid[INTEL_CPUID_INDEX_1].edx) + : "0" (1)); + } + /* This spells out "AuthenticAMD". */ + else if (ebx == 0x68747541 && ecx == 0x444d4163 && edx == 0x69746e65) + { + __cpu_features.kind = arch_kind_amd; + + asm volatile ("cpuid" + : "=a" (__cpu_features.cpuid[AMD_CPUID_INDEX_1].eax), + "=b" (__cpu_features.cpuid[AMD_CPUID_INDEX_1].ebx), + "=c" (__cpu_features.cpuid[AMD_CPUID_INDEX_1].ecx), + "=d" (__cpu_features.cpuid[AMD_CPUID_INDEX_1].edx) + : "0" (1)); + } + else + __cpu_features.kind = arch_kind_other; +} -- cgit v1.1