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| author | Florian Weimer <fweimer@redhat.com> | 2022-01-14 20:16:05 +0100 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2022-01-14 20:17:49 +0100 |
| commit | 990c953bce06d77360d2e933faa9a008e2c55405 (patch) | |
| tree | dfa4be45e055b431817a8812af168c1561334bf6 /sysdeps/x86/dl-get-cpu-features.c | |
| parent | 550116486692efc394d03befee19f7e9c17d5044 (diff) | |
| download | glibc-990c953bce06d77360d2e933faa9a008e2c55405.tar.gz glibc-990c953bce06d77360d2e933faa9a008e2c55405.tar.xz glibc-990c953bce06d77360d2e933faa9a008e2c55405.zip | |
x86: Add x86-64-vN check to early startup
This ISA level covers the glibc build itself. <dl-hwcap-check.h> cannot be used because this check (by design) happens before DL_PLATFORM_INIT and the x86 CPU flags initialization. Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'sysdeps/x86/dl-get-cpu-features.c')
| -rw-r--r-- | sysdeps/x86/dl-get-cpu-features.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/sysdeps/x86/dl-get-cpu-features.c b/sysdeps/x86/dl-get-cpu-features.c index 6339c9df4e..4ec0e5d2af 100644 --- a/sysdeps/x86/dl-get-cpu-features.c +++ b/sysdeps/x86/dl-get-cpu-features.c @@ -20,6 +20,7 @@ #ifdef SHARED # include <cpu-features.c> +# include <gcc-macros.h> /* NB: Normally, DL_PLATFORM_INIT calls init_cpu_features to initialize CPU features in dynamic executable. But when loading ld.so inside of @@ -36,7 +37,35 @@ _dl_x86_init_cpu_features (void) { struct cpu_features *cpu_features = __get_cpu_features (); if (cpu_features->basic.kind == arch_kind_unknown) - init_cpu_features (cpu_features); + { + init_cpu_features (cpu_features); + +# if IS_IN (rtld) + /* See isa-level.c. */ +# if defined GCCMACRO__GCC_HAVE_SYNC_COMPARE_AND_SWAP_16 \ + && defined HAVE_X86_LAHF_SAHF && defined GCCMACRO__POPCNT__ \ + && defined GCCMACRO__SSE3__ && defined GCCMACRO__SSSE3__ \ + && defined GCCMACRO__SSE4_1__ && defined GCCMACRO__SSE4_2__ + if (!(cpu_features->isa_1 & GNU_PROPERTY_X86_ISA_1_V2)) + _dl_fatal_printf ("\ +Fatal glibc error: CPU does not support x86-64-v%d\n", 2); +# if defined GCCMACRO__AVX__ && defined GCCMACRO__AVX2__ \ + && defined GCCMACRO__F16C__ && defined GCCMACRO__FMA__ \ + && defined GCCMACRO__LZCNT__ && defined HAVE_X86_MOVBE + if (!(cpu_features->isa_1 & GNU_PROPERTY_X86_ISA_1_V3)) + _dl_fatal_printf ("\ +Fatal glibc error: CPU does not support x86-64-v%d\n", 3); +# if defined GCCMACRO__AVX512F__ && defined GCCMACRO__AVX512BW__ \ + && defined GCCMACRO__AVX512CD__ && defined GCCMACRO__AVX512DQ__ \ + && defined GCCMACRO__AVX512VL__ + if (!(cpu_features->isa_1 & GNU_PROPERTY_X86_ISA_1_V4)) + _dl_fatal_printf ("\ +Fatal glibc error: CPU does not support x86-64-v%d\n", 4); +# endif /* ISA level 4 */ +# endif /* ISA level 3 */ +# endif /* ISA level 2 */ +# endif /* IS_IN (rtld) */ + } } __ifunc (__x86_cpu_features, __x86_cpu_features, NULL, void, |