2020-07-04 13:35:49 +00:00
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/* Initialize CPU feature data via IFUNC relocation.
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2024-01-01 18:12:26 +00:00
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Copyright (C) 2015-2024 Free Software Foundation, Inc.
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2015-08-13 10:37:47 +00:00
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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Prefer https to http for gnu.org and fsf.org URLs
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
2019-09-07 05:40:42 +00:00
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<https://www.gnu.org/licenses/>. */
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2015-08-13 10:37:47 +00:00
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#include <ldsodefs.h>
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2020-07-04 13:35:49 +00:00
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#ifdef SHARED
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# include <cpu-features.c>
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2022-01-14 19:16:05 +00:00
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# include <gcc-macros.h>
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2020-07-04 13:35:49 +00:00
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/* NB: Normally, DL_PLATFORM_INIT calls init_cpu_features to initialize
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CPU features in dynamic executable. But when loading ld.so inside of
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static executable, DL_PLATFORM_INIT isn't called and IFUNC relocation
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is used to call init_cpu_features. In static executable, it is called
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once by IFUNC relocation. In dynamic executable, it is called twice
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by DL_PLATFORM_INIT and by IFUNC relocation. */
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extern void __x86_cpu_features (void) attribute_hidden;
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2021-01-25 13:29:45 +00:00
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void (*const __x86_cpu_features_p) (void) attribute_hidden
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2020-07-04 13:35:49 +00:00
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= __x86_cpu_features;
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void
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_dl_x86_init_cpu_features (void)
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{
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struct cpu_features *cpu_features = __get_cpu_features ();
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if (cpu_features->basic.kind == arch_kind_unknown)
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2022-01-14 19:16:05 +00:00
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{
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init_cpu_features (cpu_features);
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# if IS_IN (rtld)
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/* See isa-level.c. */
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# if defined GCCMACRO__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 \
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&& defined HAVE_X86_LAHF_SAHF && defined GCCMACRO__POPCNT__ \
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&& defined GCCMACRO__SSE3__ && defined GCCMACRO__SSSE3__ \
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&& defined GCCMACRO__SSE4_1__ && defined GCCMACRO__SSE4_2__
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if (!(cpu_features->isa_1 & GNU_PROPERTY_X86_ISA_1_V2))
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_dl_fatal_printf ("\
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Fatal glibc error: CPU does not support x86-64-v%d\n", 2);
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# if defined GCCMACRO__AVX__ && defined GCCMACRO__AVX2__ \
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&& defined GCCMACRO__F16C__ && defined GCCMACRO__FMA__ \
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&& defined GCCMACRO__LZCNT__ && defined HAVE_X86_MOVBE
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if (!(cpu_features->isa_1 & GNU_PROPERTY_X86_ISA_1_V3))
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_dl_fatal_printf ("\
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Fatal glibc error: CPU does not support x86-64-v%d\n", 3);
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# if defined GCCMACRO__AVX512F__ && defined GCCMACRO__AVX512BW__ \
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&& defined GCCMACRO__AVX512CD__ && defined GCCMACRO__AVX512DQ__ \
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&& defined GCCMACRO__AVX512VL__
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if (!(cpu_features->isa_1 & GNU_PROPERTY_X86_ISA_1_V4))
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_dl_fatal_printf ("\
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Fatal glibc error: CPU does not support x86-64-v%d\n", 4);
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# endif /* ISA level 4 */
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# endif /* ISA level 3 */
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# endif /* ISA level 2 */
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# endif /* IS_IN (rtld) */
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}
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2020-07-04 13:35:49 +00:00
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}
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__ifunc (__x86_cpu_features, __x86_cpu_features, NULL, void,
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_dl_x86_init_cpu_features);
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#endif
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2020-12-25 15:30:46 +00:00
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#undef _dl_x86_get_cpu_features
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2015-08-13 10:37:47 +00:00
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const struct cpu_features *
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2020-12-25 15:30:46 +00:00
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_dl_x86_get_cpu_features (void)
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2015-08-13 10:37:47 +00:00
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{
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return &GLRO(dl_x86_cpu_features);
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}
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