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Detect ARM features with elf_aux_info on FreeBSD >= 12.0

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by @devnexen, thanks!

Fixes #1012
This commit is contained in:
Frank Denis 2020-12-04 15:34:27 +01:00
parent 761c1b34cd
commit 45bca21a95
2 changed files with 29 additions and 1 deletions
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2
configure.ac
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@ -864,7 +864,7 @@ if (&getentropy != NULL) {
])
AC_CHECK_FUNCS([posix_memalign getpid nanosleep])
AC_CHECK_FUNCS([memset_s explicit_bzero explicit_memset])
AC_CHECK_FUNCS([getauxval])
AC_CHECK_FUNCS([getauxva elf_aux_info])
AC_SUBST([LIBTOOL_EXTRA_FLAGS])

28
src/libsodium/sodium/runtime.c
View File

@ -72,10 +72,24 @@ _sodium_runtime_arm_cpu_features(CPUFeatures * const cpu_features)
#elif defined(__aarch64__) && defined(AT_HWCAP)
# ifdef HAVE_GETAUXVAL
cpu_features->has_neon = (getauxval(AT_HWCAP) & (1L << 1)) != 0;
# elif defined(HAVE_ELF_AUX_INFO)
{
unsigned long buf;
if (elf_aux_info(AT_HWCAP, (void *) &buf, (int) sizeof buf) == 0) {
cpu_features->has_neon = (buf & (1L << 1)) != 0;
}
}
# endif
#elif defined(__arm__) && defined(AT_HWCAP)
# ifdef HAVE_GETAUXVAL
cpu_features->has_neon = (getauxval(AT_HWCAP) & (1L << 12)) != 0;
# elif defined(HAVE_ELF_AUX_INFO)
{
unsigned long buf;
if (elf_aux_info(AT_HWCAP, (void *) &buf, (int) sizeof buf) == 0) {
cpu_features->has_neon = (buf & (1L << 12)) != 0;
}
}
# endif
#endif
@ -107,10 +121,24 @@ _sodium_runtime_arm_cpu_features(CPUFeatures * const cpu_features)
#elif defined(__aarch64__) && defined(AT_HWCAP)
# ifdef HAVE_GETAUXVAL
cpu_features->has_armcrypto = (getauxval(AT_HWCAP) & (1L << 3)) != 0;
# elif defined(HAVE_ELF_AUX_INFO)
{
unsigned long buf;
if (elf_aux_info(AT_HWCAP, (void *) &buf, (int) sizeof buf) == 0) {
cpu_features->has_armcrypto = (buf & (1L << 3)) != 0;
}
}
# endif
#elif defined(__arm__) && defined(AT_HWCAP2)
# ifdef HAVE_GETAUXVAL
cpu_features->has_armcrypto = (getauxval(AT_HWCAP2) & (1L << 0)) != 0;
# elif defined(HAVE_ELF_AUX_INFO)
{
unsigned long buf;
if (elf_aux_info(AT_HWCAP2, (void *) &buf, (int) sizeof buf) == 0) {
cpu_features->has_armcrypto = (buf & (1L << 0)) != 0;
}
}
# endif
#endif