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openssl/crypto/sparcv9cap.c

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/*
* 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 "bn/bn_local.h" /* for definition of bn_mul_mont */
#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
}
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