Commit 2238e0e4 authored by Andy Polyakov's avatar Andy Polyakov
Browse files

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



Reviewed-by: default avatarRich Salz <rsalz@openssl.org>
parent 81f3d632

crypto/sparcv9cap.c

+47 −0
Original line number Diff line number Diff line
@@ -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;