/*

 * Copyright 2005-2020 The OpenSSL Project Authors. All Rights Reserved.

 *

 * Licensed under the OpenSSL license (the "License").  You may not use

 * this file except in compliance with the License.  You can obtain a copy

 * in the file LICENSE in the source distribution or at

 * https://www.openssl.org/source/license.html

 */

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <setjmp.h>

#include <signal.h>

#include <sys/time.h>

#include <unistd.h>

#include <openssl/bn.h>

#include "internal/cryptlib.h"

#include "sparc_arch.h"

#if defined(__GNUC__) && defined(__linux)

__attribute__ ((visibility("hidden")))

#endif

unsigned int OPENSSL_sparcv9cap_P[2] = { SPARCV9_TICK_PRIVILEGED, 0 };

int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,

                const BN_ULONG *np, const BN_ULONG *n0, int num)

{

    int bn_mul_mont_vis3(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,

                         const BN_ULONG *np, const BN_ULONG *n0, int num);

    int bn_mul_mont_fpu(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,

                        const BN_ULONG *np, const BN_ULONG *n0, int num);

    int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,

                        const BN_ULONG *np, const BN_ULONG *n0, int num);

    if (!(num & 1) && num >= 6) {

        if ((num & 15) == 0 && num <= 64 &&

            (OPENSSL_sparcv9cap_P[1] & (CFR_MONTMUL | CFR_MONTSQR)) ==

            (CFR_MONTMUL | CFR_MONTSQR)) {

            typedef int (*bn_mul_mont_f) (BN_ULONG *rp, const BN_ULONG *ap,

                                          const BN_ULONG *bp,

                                          const BN_ULONG *np,

                                          const BN_ULONG *n0);

            int bn_mul_mont_t4_8(BN_ULONG *rp, const BN_ULONG *ap,

                                 const BN_ULONG *bp, const BN_ULONG *np,

                                 const BN_ULONG *n0);

            int bn_mul_mont_t4_16(BN_ULONG *rp, const BN_ULONG *ap,

                                  const BN_ULONG *bp, const BN_ULONG *np,

                                  const BN_ULONG *n0);

            int bn_mul_mont_t4_24(BN_ULONG *rp, const BN_ULONG *ap,

                                  const BN_ULONG *bp, const BN_ULONG *np,

                                  const BN_ULONG *n0);

            int bn_mul_mont_t4_32(BN_ULONG *rp, const BN_ULONG *ap,

                                  const BN_ULONG *bp, const BN_ULONG *np,

                                  const BN_ULONG *n0);

            static const bn_mul_mont_f funcs[4] = {

                bn_mul_mont_t4_8, bn_mul_mont_t4_16,

                bn_mul_mont_t4_24, bn_mul_mont_t4_32

            };

            bn_mul_mont_f worker = funcs[num / 16 - 1];

            if ((*worker) (rp, ap, bp, np, n0))

                return 1;

            /* retry once and fall back */

            if ((*worker) (rp, ap, bp, np, n0))

                return 1;

            return bn_mul_mont_vis3(rp, ap, bp, np, n0, num);

        }

        if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3))

            return bn_mul_mont_vis3(rp, ap, bp, np, n0, num);

        else if (num >= 8 &&

                 /*

                  * bn_mul_mont_fpu doesn't use FMADD, we just use the

                  * flag to detect when FPU path is preferable in cases

                  * when current heuristics is unreliable. [it works

                  * out because FMADD-capable processors where FPU

                  * code path is undesirable are also VIS3-capable and

                  * VIS3 code path takes precedence.]

                  */

                 ( (OPENSSL_sparcv9cap_P[0] & SPARCV9_FMADD) ||

                   (OPENSSL_sparcv9cap_P[0] &

                    (SPARCV9_PREFER_FPU | SPARCV9_VIS1)) ==

                   (SPARCV9_PREFER_FPU | SPARCV9_VIS1) ))

            return bn_mul_mont_fpu(rp, ap, bp, np, n0, num);

    }

    return bn_mul_mont_int(rp, ap, bp, np, n0, num);

}

unsigned long _sparcv9_rdtick(void);

void _sparcv9_vis1_probe(void);

unsigned long _sparcv9_vis1_instrument(void);

void _sparcv9_vis2_probe(void);

void _sparcv9_fmadd_probe(void);

unsigned long _sparcv9_rdcfr(void);

void _sparcv9_vis3_probe(void);

void _sparcv9_fjaesx_probe(void);

unsigned long _sparcv9_random(void);

size_t _sparcv9_vis1_instrument_bus(unsigned int *, size_t);

size_t _sparcv9_vis1_instrument_bus2(unsigned int *, size_t, size_t);

uint32_t OPENSSL_rdtsc(void)

{

    if (OPENSSL_sparcv9cap_P[0] & SPARCV9_TICK_PRIVILEGED)

#if defined(__sun) && defined(__SVR4)

        return gethrtime();

#else

        return 0;

#endif

    else

        return _sparcv9_rdtick();

}

size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)

{

    if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) ==

        SPARCV9_BLK)

        return _sparcv9_vis1_instrument_bus(out, cnt);

    else

        return 0;

}

size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)

{

    if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) ==

        SPARCV9_BLK)

        return _sparcv9_vis1_instrument_bus2(out, cnt, max);

    else

        return 0;

}

static sigjmp_buf common_jmp;

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;

    struct sigaction common_act, ill_oact, bus_oact;

    sigset_t all_masked, oset;

    static int trigger = 0;

    if (trigger)

        return;

    trigger = 1;

    if ((e = getenv("OPENSSL_sparcv9cap"))) {

        OPENSSL_sparcv9cap_P[0] = strtoul(e, NULL, 0);

        if ((e = strchr(e, ':')))

            OPENSSL_sparcv9cap_P[1] = strtoul(e + 1, NULL, 0);

        return;

    }

#if defined(__sun) && defined(__SVR4)

    if (getisax != NULL) {

        unsigned int vec[2] = { 0, 0 };

        if (getisax (vec,2)) {

            if (vec[0]&0x00020) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1;

            if (vec[0]&0x00040) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;

            if (vec[0]&0x00080) OPENSSL_sparcv9cap_P[0] |= SPARCV9_BLK;

            if (vec[0]&0x00100) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD;

            if (vec[0]&0x00400) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3;

            if (vec[0]&0x01000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJHPCACE;

            if (vec[0]&0x02000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJDESX;

            if (vec[0]&0x08000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_IMA;

            if (vec[0]&0x10000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX;

            if (vec[1]&0x00008) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS4;

            /* 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;

            if (vec[1]&0x00000020) OPENSSL_sparcv9cap_P[1] |= CFR_XMPMUL;

            if (vec[1]&0x00000040)

                OPENSSL_sparcv9cap_P[1] |= CFR_XMONTMUL|CFR_XMONTSQR;

            /* 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;

    sigfillset(&all_masked);

    sigdelset(&all_masked, SIGILL);

    sigdelset(&all_masked, SIGTRAP);

# ifdef SIGEMT

    sigdelset(&all_masked, SIGEMT);

# endif

    sigdelset(&all_masked, SIGFPE);

    sigdelset(&all_masked, SIGBUS);

    sigdelset(&all_masked, SIGSEGV);

    sigprocmask(SIG_SETMASK, &all_masked, &oset);

    memset(&common_act, 0, sizeof(common_act));

    common_act.sa_handler = common_handler;

    common_act.sa_mask = all_masked;

    sigaction(SIGILL, &common_act, &ill_oact);

    sigaction(SIGBUS, &common_act, &bus_oact); /* T1 fails 16-bit ldda [on

                                                * Linux] */

    if (sigsetjmp(common_jmp, 1) == 0) {

        _sparcv9_rdtick();

        OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;

    }

    if (sigsetjmp(common_jmp, 1) == 0) {

        _sparcv9_vis1_probe();

        OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1 | SPARCV9_BLK;

        /* detect UltraSPARC-Tx, see sparccpud.S for details... */

        if (_sparcv9_vis1_instrument() >= 12)

            OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU);

        else {

            _sparcv9_vis2_probe();

            OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;

        }

    }

    if (sigsetjmp(common_jmp, 1) == 0) {

        _sparcv9_fmadd_probe();

        OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD;

    }

    /*

     * VIS3 flag is tested independently from VIS1, unlike VIS2 that is,

     * because VIS3 defines even integer instructions.

     */

    if (sigsetjmp(common_jmp, 1) == 0) {

        _sparcv9_vis3_probe();

        OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3;

    }

    if (sigsetjmp(common_jmp, 1) == 0) {

        _sparcv9_fjaesx_probe();

        OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX;

    }

    /*

     * In wait for better solution _sparcv9_rdcfr is masked by

     * VIS3 flag, because it goes to uninterruptible endless

     * loop on UltraSPARC II running Solaris. Things might be

     * different on Linux...

     */

    if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3) &&

        sigsetjmp(common_jmp, 1) == 0) {

        OPENSSL_sparcv9cap_P[1] = (unsigned int)_sparcv9_rdcfr();

    }

    sigaction(SIGBUS, &bus_oact, NULL);

    sigaction(SIGILL, &ill_oact, NULL);

    sigprocmask(SIG_SETMASK, &oset, NULL);

    if (sizeof(size_t) == 8)

        OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;

# ifdef __linux

    else {

        int ret = syscall(340);

        if (ret >= 0 && ret & 1)

            OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;

    }

# endif

}