@@ -7,6 +7,7 @@ sysdep_routines += get-cpuid-feature-leaf
sysdep-dl-routines += dl-get-cpu-features
sysdep_headers += sys/platform/x86.h bits/platform/x86.h
+CFLAGS-dl-get-cpu-features.os += $(early-cflags)
CFLAGS-get-cpuid-feature-leaf.o += $(no-stack-protector)
tests += tst-get-cpu-features tst-get-cpu-features-static \
@@ -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,