297 lines
11 KiB
C
297 lines
11 KiB
C
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/*
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* Copyright 2005-2021 The OpenSSL Project Authors. All Rights Reserved.
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*
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* Licensed under the OpenSSL license (the "License"). You may not use
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* this file except in compliance with the License. You can obtain a copy
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* in the file LICENSE in the source distribution or at
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* https://www.openssl.org/source/license.html
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <setjmp.h>
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#include <signal.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <openssl/bn.h>
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#include "internal/cryptlib.h"
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#include "bn/bn_local.h" /* for definition of bn_mul_mont */
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#include "sparc_arch.h"
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#if defined(__GNUC__) && defined(__linux)
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__attribute__ ((visibility("hidden")))
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#endif
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unsigned int OPENSSL_sparcv9cap_P[2] = { SPARCV9_TICK_PRIVILEGED, 0 };
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int bn_mul_mont(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
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const BN_ULONG *np, const BN_ULONG *n0, int num)
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{
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int bn_mul_mont_vis3(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
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const BN_ULONG *np, const BN_ULONG *n0, int num);
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int bn_mul_mont_fpu(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
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const BN_ULONG *np, const BN_ULONG *n0, int num);
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int bn_mul_mont_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
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const BN_ULONG *np, const BN_ULONG *n0, int num);
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if (!(num & 1) && num >= 6) {
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if ((num & 15) == 0 && num <= 64 &&
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(OPENSSL_sparcv9cap_P[1] & (CFR_MONTMUL | CFR_MONTSQR)) ==
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(CFR_MONTMUL | CFR_MONTSQR)) {
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typedef int (*bn_mul_mont_f) (BN_ULONG *rp, const BN_ULONG *ap,
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const BN_ULONG *bp,
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const BN_ULONG *np,
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const BN_ULONG *n0);
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int bn_mul_mont_t4_8(BN_ULONG *rp, const BN_ULONG *ap,
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const BN_ULONG *bp, const BN_ULONG *np,
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const BN_ULONG *n0);
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int bn_mul_mont_t4_16(BN_ULONG *rp, const BN_ULONG *ap,
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const BN_ULONG *bp, const BN_ULONG *np,
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const BN_ULONG *n0);
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int bn_mul_mont_t4_24(BN_ULONG *rp, const BN_ULONG *ap,
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const BN_ULONG *bp, const BN_ULONG *np,
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const BN_ULONG *n0);
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int bn_mul_mont_t4_32(BN_ULONG *rp, const BN_ULONG *ap,
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const BN_ULONG *bp, const BN_ULONG *np,
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const BN_ULONG *n0);
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static const bn_mul_mont_f funcs[4] = {
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bn_mul_mont_t4_8, bn_mul_mont_t4_16,
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bn_mul_mont_t4_24, bn_mul_mont_t4_32
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};
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bn_mul_mont_f worker = funcs[num / 16 - 1];
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if ((*worker) (rp, ap, bp, np, n0))
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return 1;
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/* retry once and fall back */
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if ((*worker) (rp, ap, bp, np, n0))
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return 1;
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return bn_mul_mont_vis3(rp, ap, bp, np, n0, num);
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}
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if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3))
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return bn_mul_mont_vis3(rp, ap, bp, np, n0, num);
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else if (num >= 8 &&
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/*
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* bn_mul_mont_fpu doesn't use FMADD, we just use the
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* flag to detect when FPU path is preferable in cases
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* when current heuristics is unreliable. [it works
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* out because FMADD-capable processors where FPU
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* code path is undesirable are also VIS3-capable and
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* VIS3 code path takes precedence.]
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*/
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( (OPENSSL_sparcv9cap_P[0] & SPARCV9_FMADD) ||
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(OPENSSL_sparcv9cap_P[0] &
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(SPARCV9_PREFER_FPU | SPARCV9_VIS1)) ==
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(SPARCV9_PREFER_FPU | SPARCV9_VIS1) ))
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return bn_mul_mont_fpu(rp, ap, bp, np, n0, num);
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}
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return bn_mul_mont_int(rp, ap, bp, np, n0, num);
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}
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unsigned long _sparcv9_rdtick(void);
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void _sparcv9_vis1_probe(void);
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unsigned long _sparcv9_vis1_instrument(void);
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void _sparcv9_vis2_probe(void);
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void _sparcv9_fmadd_probe(void);
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unsigned long _sparcv9_rdcfr(void);
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void _sparcv9_vis3_probe(void);
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void _sparcv9_fjaesx_probe(void);
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unsigned long _sparcv9_random(void);
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size_t _sparcv9_vis1_instrument_bus(unsigned int *, size_t);
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size_t _sparcv9_vis1_instrument_bus2(unsigned int *, size_t, size_t);
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uint32_t OPENSSL_rdtsc(void)
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{
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if (OPENSSL_sparcv9cap_P[0] & SPARCV9_TICK_PRIVILEGED)
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#if defined(__sun) && defined(__SVR4)
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return gethrtime();
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#else
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return 0;
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#endif
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else
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return _sparcv9_rdtick();
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}
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size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
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{
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if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) ==
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SPARCV9_BLK)
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return _sparcv9_vis1_instrument_bus(out, cnt);
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else
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return 0;
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}
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size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
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{
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if ((OPENSSL_sparcv9cap_P[0] & (SPARCV9_TICK_PRIVILEGED | SPARCV9_BLK)) ==
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SPARCV9_BLK)
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return _sparcv9_vis1_instrument_bus2(out, cnt, max);
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else
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return 0;
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}
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static sigjmp_buf common_jmp;
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static void common_handler(int sig)
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{
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siglongjmp(common_jmp, sig);
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}
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#if defined(__sun) && defined(__SVR4)
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# if defined(__GNUC__) && __GNUC__>=2
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extern unsigned int getisax(unsigned int vec[], unsigned int sz) __attribute__ ((weak));
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# elif defined(__SUNPRO_C)
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#pragma weak getisax
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extern unsigned int getisax(unsigned int vec[], unsigned int sz);
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# else
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static unsigned int (*getisax) (unsigned int vec[], unsigned int sz) = NULL;
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# endif
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#endif
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void OPENSSL_cpuid_setup(void)
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{
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char *e;
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struct sigaction common_act, ill_oact, bus_oact;
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sigset_t all_masked, oset;
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static int trigger = 0;
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if (trigger)
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return;
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trigger = 1;
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if ((e = getenv("OPENSSL_sparcv9cap"))) {
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OPENSSL_sparcv9cap_P[0] = strtoul(e, NULL, 0);
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if ((e = strchr(e, ':')))
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OPENSSL_sparcv9cap_P[1] = strtoul(e + 1, NULL, 0);
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return;
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}
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#if defined(__sun) && defined(__SVR4)
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if (getisax != NULL) {
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unsigned int vec[2] = { 0, 0 };
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if (getisax (vec,2)) {
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if (vec[0]&0x00020) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1;
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if (vec[0]&0x00040) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;
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if (vec[0]&0x00080) OPENSSL_sparcv9cap_P[0] |= SPARCV9_BLK;
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if (vec[0]&0x00100) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD;
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if (vec[0]&0x00400) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3;
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if (vec[0]&0x01000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJHPCACE;
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if (vec[0]&0x02000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJDESX;
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if (vec[0]&0x08000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_IMA;
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if (vec[0]&0x10000) OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX;
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if (vec[1]&0x00008) OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS4;
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/* reconstruct %cfr copy */
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OPENSSL_sparcv9cap_P[1] = (vec[0]>>17)&0x3ff;
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OPENSSL_sparcv9cap_P[1] |= (OPENSSL_sparcv9cap_P[1]&CFR_MONTMUL)<<1;
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if (vec[0]&0x20000000) OPENSSL_sparcv9cap_P[1] |= CFR_CRC32C;
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if (vec[1]&0x00000020) OPENSSL_sparcv9cap_P[1] |= CFR_XMPMUL;
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if (vec[1]&0x00000040)
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OPENSSL_sparcv9cap_P[1] |= CFR_XMONTMUL|CFR_XMONTSQR;
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/* Some heuristics */
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/* all known VIS2-capable CPUs have unprivileged tick counter */
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if (OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS2)
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OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
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OPENSSL_sparcv9cap_P[0] |= SPARCV9_PREFER_FPU;
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/* detect UltraSPARC-Tx, see sparccpud.S for details... */
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if ((OPENSSL_sparcv9cap_P[0]&SPARCV9_VIS1) &&
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_sparcv9_vis1_instrument() >= 12)
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OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU);
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}
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if (sizeof(size_t) == 8)
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OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;
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return;
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}
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#endif
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/* Initial value, fits UltraSPARC-I&II... */
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OPENSSL_sparcv9cap_P[0] = SPARCV9_PREFER_FPU | SPARCV9_TICK_PRIVILEGED;
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sigfillset(&all_masked);
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sigdelset(&all_masked, SIGILL);
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sigdelset(&all_masked, SIGTRAP);
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# ifdef SIGEMT
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sigdelset(&all_masked, SIGEMT);
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# endif
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sigdelset(&all_masked, SIGFPE);
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sigdelset(&all_masked, SIGBUS);
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sigdelset(&all_masked, SIGSEGV);
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sigprocmask(SIG_SETMASK, &all_masked, &oset);
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memset(&common_act, 0, sizeof(common_act));
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common_act.sa_handler = common_handler;
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common_act.sa_mask = all_masked;
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sigaction(SIGILL, &common_act, &ill_oact);
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sigaction(SIGBUS, &common_act, &bus_oact); /* T1 fails 16-bit ldda [on
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* Linux] */
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if (sigsetjmp(common_jmp, 1) == 0) {
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_sparcv9_rdtick();
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OPENSSL_sparcv9cap_P[0] &= ~SPARCV9_TICK_PRIVILEGED;
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}
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if (sigsetjmp(common_jmp, 1) == 0) {
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_sparcv9_vis1_probe();
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OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS1 | SPARCV9_BLK;
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/* detect UltraSPARC-Tx, see sparccpud.S for details... */
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if (_sparcv9_vis1_instrument() >= 12)
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OPENSSL_sparcv9cap_P[0] &= ~(SPARCV9_VIS1 | SPARCV9_PREFER_FPU);
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else {
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_sparcv9_vis2_probe();
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OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS2;
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}
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}
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if (sigsetjmp(common_jmp, 1) == 0) {
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_sparcv9_fmadd_probe();
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OPENSSL_sparcv9cap_P[0] |= SPARCV9_FMADD;
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}
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/*
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* VIS3 flag is tested independently from VIS1, unlike VIS2 that is,
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* because VIS3 defines even integer instructions.
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*/
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if (sigsetjmp(common_jmp, 1) == 0) {
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_sparcv9_vis3_probe();
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OPENSSL_sparcv9cap_P[0] |= SPARCV9_VIS3;
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}
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if (sigsetjmp(common_jmp, 1) == 0) {
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_sparcv9_fjaesx_probe();
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OPENSSL_sparcv9cap_P[0] |= SPARCV9_FJAESX;
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}
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/*
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* In wait for better solution _sparcv9_rdcfr is masked by
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* VIS3 flag, because it goes to uninterruptible endless
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* loop on UltraSPARC II running Solaris. Things might be
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* different on Linux...
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*/
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if ((OPENSSL_sparcv9cap_P[0] & SPARCV9_VIS3) &&
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sigsetjmp(common_jmp, 1) == 0) {
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OPENSSL_sparcv9cap_P[1] = (unsigned int)_sparcv9_rdcfr();
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}
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sigaction(SIGBUS, &bus_oact, NULL);
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sigaction(SIGILL, &ill_oact, NULL);
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sigprocmask(SIG_SETMASK, &oset, NULL);
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if (sizeof(size_t) == 8)
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OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;
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# ifdef __linux
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else {
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int ret = syscall(340);
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if (ret >= 0 && ret & 1)
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OPENSSL_sparcv9cap_P[0] |= SPARCV9_64BIT_STACK;
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}
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# endif
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}
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