[thirdparty/openssl.git] / crypto / sparcv9cap.c

/*
 * Copyright 2005-2021 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (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 "crypto/sparc_arch.h"

#if defined(__GNUC__) && defined(__linux)
__attribute__ ((visibility("hidden")))
#endif
unsigned int OPENSSL_sparcv9cap_P[2] = { SPARCV9_TICK_PRIVILEGED, 0 };

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
}
Commit	Line	Data
b1322259	1	/*
38fc02a7	2	* Copyright 2005-2021 The OpenSSL Project Authors. All Rights Reserved.
b1322259	3	*
0e9725bc	4	* Licensed under the Apache License 2.0 (the "License"). You may not use
b1322259 RS	5	* this file except in compliance with the License. You can obtain a copy
	6	* in the file LICENSE in the source distribution or at
	7	* https://www.openssl.org/source/license.html
	8	*/
	9
c06b0f3d AP	10	#include <stdio.h>
	11	#include <stdlib.h>
	12	#include <string.h>
c32fcca6 AP	13	#include <setjmp.h>
c32fcca6 AP	14	#include <signal.h>
c06b0f3d	15	#include <sys/time.h>
68c06bf6	16	#include <unistd.h>
c06b0f3d	17	#include <openssl/bn.h>
d807db26	18	#include "internal/cryptlib.h"
52f7e44e	19	#include "crypto/sparc_arch.h"
c32fcca6	20
1fda639a	21	#if defined(__GNUC__) && defined(__linux)
0f113f3e	22	__attribute__ ((visibility("hidden")))
1fda639a	23	#endif
0f113f3e MC	24	unsigned int OPENSSL_sparcv9cap_P[2] = { SPARCV9_TICK_PRIVILEGED, 0 };
0f113f3e MC	25
0f113f3e MC	26	unsigned long _sparcv9_rdtick(void);
	27	void _sparcv9_vis1_probe(void);
	28	unsigned long _sparcv9_vis1_instrument(void);
	29	void _sparcv9_vis2_probe(void);
	30	void _sparcv9_fmadd_probe(void);
	31	unsigned long _sparcv9_rdcfr(void);
	32	void _sparcv9_vis3_probe(void);
d40a13af	33	void _sparcv9_fjaesx_probe(void);
0f113f3e MC	34	unsigned long _sparcv9_random(void);
	35	size_t _sparcv9_vis1_instrument_bus(unsigned int *, size_t);
	36	size_t _sparcv9_vis1_instrument_bus2(unsigned int *, size_t, size_t);
c32fcca6	37
d807db26	38	uint32_t OPENSSL_rdtsc(void)
0f113f3e MC	39	{
0f113f3e MC	40	if (OPENSSL_sparcv9cap_P[0] & SPARCV9_TICK_PRIVILEGED)
c06b0f3d	41	#if defined(__sun) && defined(__SVR4)
0f113f3e	42	return gethrtime();
c06b0f3d	43	#else
0f113f3e	44	return 0;
c06b0f3d	45	#endif
0f113f3e MC	46	else
	47	return _sparcv9_rdtick();
	48	}
	49
	50	size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
	51	{
	52	if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED \| SPARCV9_BLK)) ==
	53	SPARCV9_BLK)
	54	return _sparcv9_vis1_instrument_bus(out, cnt);
	55	else
	56	return 0;
	57	}
	58
	59	size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
	60	{
	61	if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED \| SPARCV9_BLK)) ==
	62	SPARCV9_BLK)
	63	return _sparcv9_vis1_instrument_bus2(out, cnt, max);
	64	else
	65	return 0;
	66	}
5fabb88a	67
c32fcca6	68	static sigjmp_buf common_jmp;
0f113f3e MC	69	static void common_handler(int sig)
	70	{
	71	siglongjmp(common_jmp, sig);
	72	}
c32fcca6	73
2238e0e4 AP	74	#if defined(__sun) && defined(__SVR4)
	75	# if defined(__GNUC__) && __GNUC__>=2
	76	extern unsigned int getisax(unsigned int vec[], unsigned int sz) __attribute__ ((weak));
	77	# elif defined(__SUNPRO_C)
	78	#pragma weak getisax
	79	extern unsigned int getisax(unsigned int vec[], unsigned int sz);
	80	# else
	81	static unsigned int (*getisax) (unsigned int vec[], unsigned int sz) = NULL;
	82	# endif
	83	#endif
	84
5d7324e4	85	void OPENSSL_cpuid_setup(void)
0f113f3e MC	86	{
	87	char *e;
	88	struct sigaction common_act, ill_oact, bus_oact;
	89	sigset_t all_masked, oset;
	90	static int trigger = 0;
	91
	92	if (trigger)
	93	return;
	94	trigger = 1;
	95
	96	if ((e = getenv("OPENSSL_sparcv9cap"))) {
	97	OPENSSL_sparcv9cap_P[0] = strtoul(e, NULL, 0);
	98	if ((e = strchr(e, ':')))
	99	OPENSSL_sparcv9cap_P[1] = strtoul(e + 1, NULL, 0);
	100	return;
	101	}
	102
2238e0e4 AP	103	#if defined(__sun) && defined(__SVR4)
2238e0e4 AP	104	if (getisax != NULL) {
a5a95f8d	105	unsigned int vec[2] = { 0, 0 };
2238e0e4	106
a5a95f8d	107	if (getisax (vec,2)) {
299ccadc AP	108	if (vec[0]&0x00020) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS1;
	109	if (vec[0]&0x00040) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS2;
	110	if (vec[0]&0x00080) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_BLK;
	111	if (vec[0]&0x00100) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FMADD;
	112	if (vec[0]&0x00400) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS3;
	113	if (vec[0]&0x01000) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FJHPCACE;
	114	if (vec[0]&0x02000) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FJDESX;
	115	if (vec[0]&0x08000) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_IMA;
4400f6c6	116	if (vec[0]&0x10000) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FJAESX;
299ccadc	117	if (vec[1]&0x00008) OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS4;
2238e0e4 AP	118
	119	/* reconstruct %cfr copy */
	120	OPENSSL_sparcv9cap_P[1] = (vec[0]>>17)&0x3ff;
	121	OPENSSL_sparcv9cap_P[1] \|= (OPENSSL_sparcv9cap_P[1]&CFR_MONTMUL)<<1;
	122	if (vec[0]&0x20000000) OPENSSL_sparcv9cap_P[1] \|= CFR_CRC32C;
299ccadc AP	123	if (vec[1]&0x00000020) OPENSSL_sparcv9cap_P[1] \|= CFR_XMPMUL;
	124	if (vec[1]&0x00000040)
	125	OPENSSL_sparcv9cap_P[1] \|= CFR_XMONTMUL\|CFR_XMONTSQR;
2238e0e4 AP	126
	127	/* Some heuristics */
	128	/* all known VIS2-capable CPUs have unprivileged tick counter */
	129	if (OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS2)
	130	OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
	131
	132	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_PREFER_FPU;
	133
	134	/* detect UltraSPARC-Tx, see sparccpud.S for details... */
	135	if ((OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS1) &&
	136	_sparcv9_vis1_instrument() >= 12)
	137	OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 \| SPARCV9_PREFER_FPU);
	138	}
	139
	140	if (sizeof(size_t) == 8)
	141	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_64BIT_STACK;
	142
	143	return;
	144	}
	145	#endif
	146
0f113f3e MC	147	/* Initial value, fits UltraSPARC-I&II... */
	148	OPENSSL_sparcv9cap_P[0] = SPARCV9_PREFER_FPU \| SPARCV9_TICK_PRIVILEGED;
	149
	150	sigfillset(&all_masked);
	151	sigdelset(&all_masked, SIGILL);
	152	sigdelset(&all_masked, SIGTRAP);
	153	# ifdef SIGEMT
	154	sigdelset(&all_masked, SIGEMT);
	155	# endif
	156	sigdelset(&all_masked, SIGFPE);
	157	sigdelset(&all_masked, SIGBUS);
	158	sigdelset(&all_masked, SIGSEGV);
	159	sigprocmask(SIG_SETMASK, &all_masked, &oset);
	160
	161	memset(&common_act, 0, sizeof(common_act));
	162	common_act.sa_handler = common_handler;
	163	common_act.sa_mask = all_masked;
	164
	165	sigaction(SIGILL, &common_act, &ill_oact);
	166	sigaction(SIGBUS, &common_act, &bus_oact); /* T1 fails 16-bit ldda [on
	167	* Linux] */
	168
	169	if (sigsetjmp(common_jmp, 1) == 0) {
	170	_sparcv9_rdtick();
	171	OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
	172	}
	173
	174	if (sigsetjmp(common_jmp, 1) == 0) {
	175	_sparcv9_vis1_probe();
	176	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS1 \| SPARCV9_BLK;
	177	/* detect UltraSPARC-Tx, see sparccpud.S for details... */
	178	if (_sparcv9_vis1_instrument() >= 12)
	179	OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 \| SPARCV9_PREFER_FPU);
	180	else {
	181	_sparcv9_vis2_probe();
	182	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS2;
	183	}
	184	}
	185
	186	if (sigsetjmp(common_jmp, 1) == 0) {
	187	_sparcv9_fmadd_probe();
	188	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FMADD;
	189	}
	190
	191	/*
	192	* VIS3 flag is tested independently from VIS1, unlike VIS2 that is,
	193	* because VIS3 defines even integer instructions.
	194	*/
	195	if (sigsetjmp(common_jmp, 1) == 0) {
	196	_sparcv9_vis3_probe();
	197	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_VIS3;
	198	}
0f113f3e	199
4400f6c6 AP	200	if (sigsetjmp(common_jmp, 1) == 0) {
	201	_sparcv9_fjaesx_probe();
	202	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_FJAESX;
	203	}
	204
0f113f3e MC	205	/*
0f113f3e MC	206	* In wait for better solution _sparcv9_rdcfr is masked by
7fa8bcfe	207	* VIS3 flag, because it goes to uninterruptible endless
0f113f3e MC	208	* loop on UltraSPARC II running Solaris. Things might be
	209	* different on Linux...
	210	*/
	211	if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3) &&
	212	sigsetjmp(common_jmp, 1) == 0) {
	213	OPENSSL_sparcv9cap_P[1] = (unsigned int)_sparcv9_rdcfr();
	214	}
	215
	216	sigaction(SIGBUS, &bus_oact, NULL);
	217	sigaction(SIGILL, &ill_oact, NULL);
	218
	219	sigprocmask(SIG_SETMASK, &oset, NULL);
	220
	221	if (sizeof(size_t) == 8)
	222	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_64BIT_STACK;
	223	# ifdef __linux
	224	else {
	225	int ret = syscall(340);
	226
	227	if (ret >= 0 && ret & 1)
	228	OPENSSL_sparcv9cap_P[0] \|= SPARCV9_64BIT_STACK;
	229	}
	230	# endif
	231	}