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crypto/ppccap.c: SIGILL-free processor capabilities detection on MacOS X.

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It seems to be problematic to probe processor capabilities with SIGILL
on MacOS X. The problem should be limited to cases when application code
is debugged, but crashes were reported even during normal execution...

Reviewed-by: Kurt Roeckx <kurt@openssl.org>
Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
Andy Polyakov 2017-04-01 15:28:28 +02:00
parent d83112b7fd
commit 0bd93bbe4a
1 changed files with 26 additions and 0 deletions
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26
crypto/ppccap.c
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@ -22,6 +22,10 @@
# define __power_set(a) (_system_configuration.implementation & (a))
# endif
#endif
#if defined(__APPLE__) && defined(__MACH__)
# include <sys/types.h>
# include <sys/sysctl.h>
#endif
#include <openssl/crypto.h>
#include <openssl/bn.h>
@ -240,6 +244,28 @@ void OPENSSL_cpuid_setup(void)
# endif
#endif
#if defined(__APPLE__) && defined(__MACH__)
OPENSSL_ppccap_P |= PPC_FPU;
{
int val;
size_t len = sizeof(val);
if (sysctlbyname("hw.optional.64bitops", &val, &len, NULL, 0) == 0) {
if (val)
OPENSSL_ppccap_P |= PPC_FPU64;
}
len = sizeof(val);
if (sysctlbyname("hw.optional.altivec", &val, &len, NULL, 0) == 0) {
if (val)
OPENSSL_ppccap_P |= PPC_ALTIVEC;
}
return;
}
#endif
if (getauxval != NULL) {
unsigned long hwcap = getauxval(HWCAP);