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x86-64: Don't use SSE resolvers for ISA level 3 or above

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When glibc is built with ISA level 3 or above enabled, SSE resolvers
aren't available and glibc fails to build:

ld: .../elf/librtld.os: in function `init_cpu_features':
.../elf/../sysdeps/x86/cpu-features.c:1200:(.text+0x1445f): undefined reference to `_dl_runtime_resolve_fxsave'
ld: .../elf/librtld.os: relocation R_X86_64_PC32 against undefined hidden symbol `_dl_runtime_resolve_fxsave' can not be used when making a shared object
/usr/local/bin/ld: final link failed: bad value

For ISA level 3 or above, don't use _dl_runtime_resolve_fxsave nor
_dl_tlsdesc_dynamic_fxsave.

This fixes BZ #31429.
Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
This commit is contained in:
H.J. Lu
2024-02-28 09:51:14 -08:00
parent 0aac205a81
commit befe2d3c4d
2 changed files with 20 additions and 12 deletions
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17
sysdeps/x86/cpu-features.c
View File

@ -18,6 +18,7 @@
#include <dl-hwcap.h>
#include <libc-pointer-arith.h>
#include <isa-level.h>
#include <get-isa-level.h>
#include <cacheinfo.h>
#include <dl-cacheinfo.h>
@ -1144,7 +1145,9 @@ no_cpuid:
TUNABLE_CALLBACK (set_x86_shstk));
#endif
#if MINIMUM_X86_ISA_LEVEL < AVX_X86_ISA_LEVEL
if (GLRO(dl_x86_cpu_features).xsave_state_size != 0)
#endif
{
if (CPU_FEATURE_USABLE_P (cpu_features, XSAVEC))
{
@ -1165,22 +1168,24 @@ no_cpuid:
#endif
}
}
#if MINIMUM_X86_ISA_LEVEL < AVX_X86_ISA_LEVEL
else
{
#ifdef __x86_64__
# ifdef __x86_64__
GLRO(dl_x86_64_runtime_resolve) = _dl_runtime_resolve_fxsave;
# ifdef SHARED
# ifdef SHARED
GLRO(dl_x86_tlsdesc_dynamic) = _dl_tlsdesc_dynamic_fxsave;
# endif
#else
# ifdef SHARED
# endif
# else
# ifdef SHARED
if (CPU_FEATURE_USABLE_P (cpu_features, FXSR))
GLRO(dl_x86_tlsdesc_dynamic) = _dl_tlsdesc_dynamic_fxsave;
else
GLRO(dl_x86_tlsdesc_dynamic) = _dl_tlsdesc_dynamic_fnsave;
# endif
# endif
#endif
}
#endif
#ifdef SHARED
# ifdef __x86_64__