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crypto/sparcv9cap.c: add SIGILL-free feature detection for Solaris.

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Reviewed-by: Rich Salz <rsalz@openssl.org>
This commit is contained in:
Andy Polyakov 2015-12-01 12:21:08 +01:00
parent 81f3d6323d
commit 2238e0e45d
1 changed files with 47 additions and 0 deletions
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47
crypto/sparcv9cap.c
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@ -115,6 +115,17 @@ static void common_handler(int sig)
siglongjmp(common_jmp, sig);
}
#if defined(__sun) && defined(__SVR4)
# if defined(__GNUC__) && __GNUC__>=2
extern unsigned int getisax(unsigned int vec[], unsigned int sz) __attribute__ ((weak));
# elif defined(__SUNPRO_C)
#pragma weak getisax
extern unsigned int getisax(unsigned int vec[], unsigned int sz);
# else
static unsigned int (*getisax) (unsigned int vec[], unsigned int sz) = NULL;
# endif
#endif
void OPENSSL_cpuid_setup(void)
{
char *e;
@ -133,6 +144,42 @@ void OPENSSL_cpuid_setup(void)
return;
}
#if defined(__sun) && defined(__SVR4)
if (getisax != NULL) {
unsigned int vec[1];
if (getisax (vec,1)) {
if (vec[0]&0x0020) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1;
if (vec[0]&0x0040) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;
if (vec[0]&0x0080) OPENSSL_sparcv9cap_P[0] |= SPARCV9_BLK;
if (vec[0]&0x0100) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD;
if (vec[0]&0x0400) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3;
/* reconstruct %cfr copy */
OPENSSL_sparcv9cap_P[1] = (vec[0]>>17)&0x3ff;
OPENSSL_sparcv9cap_P[1] |= (OPENSSL_sparcv9cap_P[1]&CFR_MONTMUL)<<1;
if (vec[0]&0x20000000) OPENSSL_sparcv9cap_P[1] |= CFR_CRC32C;
/* Some heuristics */
/* all known VIS2-capable CPUs have unprivileged tick counter */
if (OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS2)
OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
OPENSSL_sparcv9cap_P[0] |= SPARCV9_PREFER_FPU;
/* detect UltraSPARC-Tx, see sparccpud.S for details... */
if ((OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS1) &&
_sparcv9_vis1_instrument() >= 12)
OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU);
}
if (sizeof(size_t) == 8)
OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;
return;
}
#endif
/* Initial value, fits UltraSPARC-I&II... */
OPENSSL_sparcv9cap_P[0] = SPARCV9_PREFER_FPU | SPARCV9_TICK_PRIVILEGED;