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commit f267e1c9dd7fb8852cc32d6eafd96bbcfd5cbb2b
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Author: Florian Weimer <fweimer@redhat.com>
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Date: Fri Dec 4 09:13:43 2020 +0100
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x86_64: Add glibc-hwcaps support
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The subdirectories match those in the x86-64 psABI:
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https://gitlab.com/x86-psABIs/x86-64-ABI/-/commit/77566eb03bc6a326811cb7e9a6b9396884b67c7c
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Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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diff --git a/elf/Makefile b/elf/Makefile
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index f67b231c0f8e3aff..7f2fc73877f0a4c8 100644
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--- a/elf/Makefile
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+++ b/elf/Makefile
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@@ -1751,7 +1751,7 @@ $(objpfx)argv0test.out: tst-rtld-argv0.sh $(objpfx)ld.so \
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# glibc-hwcaps mechanism for this architecture). Used to obtain test
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# coverage for some glibc-hwcaps tests for the widest possible range
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# of systems.
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-glibc-hwcaps-first-subdirs-for-tests =
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+glibc-hwcaps-first-subdirs-for-tests = x86-64-v2
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# The test modules are parameterized by preprocessor macros.
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LDFLAGS-libmarkermod1-1.so += -Wl,-soname,libmarkermod1.so
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diff --git a/elf/tst-glibc-hwcaps-cache.script b/elf/tst-glibc-hwcaps-cache.script
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index 6356d152089cdd9a..66d6942402b7233b 100644
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--- a/elf/tst-glibc-hwcaps-cache.script
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+++ b/elf/tst-glibc-hwcaps-cache.script
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@@ -4,3 +4,13 @@
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cp $B/elf/libmarkermod2-1.so $L/libmarkermod2.so
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cp $B/elf/libmarkermod3-1.so $L/libmarkermod3.so
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cp $B/elf/libmarkermod4-1.so $L/libmarkermod4.so
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+
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+mkdirp 0770 $L/glibc-hwcaps/x86-64-v2
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+cp $B/elf/libmarkermod2-2.so $L/glibc-hwcaps/x86-64-v2/libmarkermod2.so
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+mkdirp 0770 $L/glibc-hwcaps/x86-64-v3
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+cp $B/elf/libmarkermod3-2.so $L/glibc-hwcaps/x86-64-v2/libmarkermod3.so
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+cp $B/elf/libmarkermod3-3.so $L/glibc-hwcaps/x86-64-v3/libmarkermod3.so
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+mkdirp 0770 $L/glibc-hwcaps/x86-64-v4
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+cp $B/elf/libmarkermod4-2.so $L/glibc-hwcaps/x86-64-v2/libmarkermod4.so
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+cp $B/elf/libmarkermod4-3.so $L/glibc-hwcaps/x86-64-v3/libmarkermod4.so
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+cp $B/elf/libmarkermod4-4.so $L/glibc-hwcaps/x86-64-v4/libmarkermod4.so
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diff --git a/sysdeps/x86_64/Makefile b/sysdeps/x86_64/Makefile
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index 42b97c5cc73892cc..d1d7cb9d2eeca9c5 100644
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--- a/sysdeps/x86_64/Makefile
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+++ b/sysdeps/x86_64/Makefile
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@@ -144,8 +144,47 @@ CFLAGS-tst-auditmod10b.c += $(AVX512-CFLAGS)
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CFLAGS-tst-avx512-aux.c += $(AVX512-CFLAGS)
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CFLAGS-tst-avx512mod.c += $(AVX512-CFLAGS)
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endif
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+
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+$(objpfx)tst-glibc-hwcaps: $(objpfx)libmarkermod2-1.so \
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+ $(objpfx)libmarkermod3-1.so $(objpfx)libmarkermod4-1.so
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+$(objpfx)tst-glibc-hwcaps.out: \
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+ $(objpfx)libmarkermod2.so \
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+ $(objpfx)glibc-hwcaps/x86-64-v2/libmarkermod2.so \
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+ $(objpfx)libmarkermod3.so \
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+ $(objpfx)glibc-hwcaps/x86-64-v2/libmarkermod3.so \
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+ $(objpfx)glibc-hwcaps/x86-64-v3/libmarkermod3.so \
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+ $(objpfx)libmarkermod4.so \
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+ $(objpfx)glibc-hwcaps/x86-64-v2/libmarkermod4.so \
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+ $(objpfx)glibc-hwcaps/x86-64-v3/libmarkermod4.so \
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+ $(objpfx)glibc-hwcaps/x86-64-v4/libmarkermod4.so \
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+
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+$(objpfx)glibc-hwcaps/x86-64-v2/libmarkermod2.so: $(objpfx)libmarkermod2-2.so
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+ $(make-target-directory)
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+ cp $< $@
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+$(objpfx)glibc-hwcaps/x86-64-v2/libmarkermod3.so: $(objpfx)libmarkermod3-2.so
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+ $(make-target-directory)
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+ cp $< $@
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+$(objpfx)glibc-hwcaps/x86-64-v3/libmarkermod3.so: $(objpfx)libmarkermod3-3.so
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+ $(make-target-directory)
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+ cp $< $@
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+$(objpfx)glibc-hwcaps/x86-64-v2/libmarkermod4.so: $(objpfx)libmarkermod4-2.so
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+ $(make-target-directory)
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+ cp $< $@
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+$(objpfx)glibc-hwcaps/x86-64-v3/libmarkermod4.so: $(objpfx)libmarkermod4-3.so
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+ $(make-target-directory)
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+ cp $< $@
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+$(objpfx)glibc-hwcaps/x86-64-v4/libmarkermod4.so: $(objpfx)libmarkermod4-4.so
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+ $(make-target-directory)
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+ cp $< $@
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+
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+ifeq (no,$(build-hardcoded-path-in-tests))
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+# This is an ld.so.cache test, and RPATH/RUNPATH in the executable
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+# interferes with its test objectives.
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+tests-container += tst-glibc-hwcaps-cache
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endif
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+endif # $(subdir) == elf
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+
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ifeq ($(subdir),csu)
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gen-as-const-headers += tlsdesc.sym rtld-offsets.sym
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endif
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diff --git a/sysdeps/x86_64/dl-hwcaps-subdirs.c b/sysdeps/x86_64/dl-hwcaps-subdirs.c
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new file mode 100644
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index 0000000000000000..8810a822efe36962
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--- /dev/null
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+++ b/sysdeps/x86_64/dl-hwcaps-subdirs.c
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@@ -0,0 +1,66 @@
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+/* Architecture-specific glibc-hwcaps subdirectories. x86 version.
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+ Copyright (C) 2020 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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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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+
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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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+
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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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+ <https://www.gnu.org/licenses/>. */
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+
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+#include <dl-hwcaps.h>
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+#include <cpu-features.h>
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+
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+const char _dl_hwcaps_subdirs[] = "x86-64-v4:x86-64-v3:x86-64-v2";
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+enum { subdirs_count = 3 }; /* Number of components in _dl_hwcaps_subdirs. */
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+
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+uint32_t
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+_dl_hwcaps_subdirs_active (void)
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+{
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+ int active = 0;
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+
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+ /* Test in reverse preference order. */
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+
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+ /* x86-64-v2. */
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+ if (!(CPU_FEATURE_USABLE (CMPXCHG16B)
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+ && CPU_FEATURE_USABLE (LAHF64_SAHF64)
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+ && CPU_FEATURE_USABLE (POPCNT)
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+ && CPU_FEATURE_USABLE (SSE3)
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+ && CPU_FEATURE_USABLE (SSE4_1)
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+ && CPU_FEATURE_USABLE (SSE4_2)
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+ && CPU_FEATURE_USABLE (SSSE3)))
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+ return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
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+ ++active;
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+
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+ /* x86-64-v3. */
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+ if (!(CPU_FEATURE_USABLE (AVX)
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+ && CPU_FEATURE_USABLE (AVX2)
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+ && CPU_FEATURE_USABLE (BMI1)
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+ && CPU_FEATURE_USABLE (BMI2)
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+ && CPU_FEATURE_USABLE (F16C)
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+ && CPU_FEATURE_USABLE (FMA)
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+ && CPU_FEATURE_USABLE (LZCNT)
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+ && CPU_FEATURE_USABLE (MOVBE)
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+ && CPU_FEATURE_USABLE (OSXSAVE)))
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+ return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
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+ ++active;
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+
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+ /* x86-64-v4. */
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+ if (!(CPU_FEATURE_USABLE (AVX512F)
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+ && CPU_FEATURE_USABLE (AVX512BW)
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+ && CPU_FEATURE_USABLE (AVX512CD)
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+ && CPU_FEATURE_USABLE (AVX512DQ)
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+ && CPU_FEATURE_USABLE (AVX512VL)))
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+ return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
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+ ++active;
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+
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+ return _dl_hwcaps_subdirs_build_bitmask (subdirs_count, active);
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+}
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diff --git a/sysdeps/x86_64/tst-glibc-hwcaps.c b/sysdeps/x86_64/tst-glibc-hwcaps.c
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new file mode 100644
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index 0000000000000000..3075a8286dc30768
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--- /dev/null
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+++ b/sysdeps/x86_64/tst-glibc-hwcaps.c
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@@ -0,0 +1,76 @@
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+/* glibc-hwcaps subdirectory test. x86_64 version.
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+ Copyright (C) 2020 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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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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+
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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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+
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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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+ <https://www.gnu.org/licenses/>. */
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+
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+#include <stdio.h>
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+#include <support/check.h>
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+#include <sys/param.h>
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+#include <sys/platform/x86.h>
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+
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+extern int marker2 (void);
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+extern int marker3 (void);
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+extern int marker4 (void);
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+
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+/* Return the x86-64-vN level, 1 for the baseline. */
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+static int
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+compute_level (void)
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+{
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+ const struct cpu_features *cpu_features
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+ = __x86_get_cpu_features (COMMON_CPUID_INDEX_MAX);
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+
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+ if (!(CPU_FEATURE_USABLE_P (cpu_features, CMPXCHG16B)
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+ && CPU_FEATURE_USABLE_P (cpu_features, LAHF64_SAHF64)
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+ && CPU_FEATURE_USABLE_P (cpu_features, POPCNT)
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+ && CPU_FEATURE_USABLE_P (cpu_features, MMX)
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+ && CPU_FEATURE_USABLE_P (cpu_features, SSE)
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+ && CPU_FEATURE_USABLE_P (cpu_features, SSE2)
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+ && CPU_FEATURE_USABLE_P (cpu_features, SSE3)
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+ && CPU_FEATURE_USABLE_P (cpu_features, SSSE3)
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+ && CPU_FEATURE_USABLE_P (cpu_features, SSE4_1)
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+ && CPU_FEATURE_USABLE_P (cpu_features, SSE4_2)))
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+ return 1;
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+ if (!(CPU_FEATURE_USABLE_P (cpu_features, AVX)
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+ && CPU_FEATURE_USABLE_P (cpu_features, AVX2)
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+ && CPU_FEATURE_USABLE_P (cpu_features, BMI1)
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+ && CPU_FEATURE_USABLE_P (cpu_features, BMI2)
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+ && CPU_FEATURE_USABLE_P (cpu_features, F16C)
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+ && CPU_FEATURE_USABLE_P (cpu_features, FMA)
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+ && CPU_FEATURE_USABLE_P (cpu_features, LZCNT)
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+ && CPU_FEATURE_USABLE_P (cpu_features, MOVBE)
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+ && CPU_FEATURE_USABLE_P (cpu_features, OSXSAVE)))
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+ return 2;
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+ if (!(CPU_FEATURE_USABLE_P (cpu_features, AVX512F)
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+ && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW)
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+ && CPU_FEATURE_USABLE_P (cpu_features, AVX512CD)
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+ && CPU_FEATURE_USABLE_P (cpu_features, AVX512DQ)
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+ && CPU_FEATURE_USABLE_P (cpu_features, AVX512VL)))
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+ return 3;
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+ return 4;
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+}
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+
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+static int
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+do_test (void)
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+{
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+ int level = compute_level ();
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+ printf ("info: detected x86-64 micro-architecture level: %d\n", level);
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+ TEST_COMPARE (marker2 (), MIN (level, 2));
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+ TEST_COMPARE (marker3 (), MIN (level, 3));
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+ TEST_COMPARE (marker4 (), MIN (level, 4));
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+ return 0;
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+}
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+
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+#include <support/test-driver.c>
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