text: /*
   * Copyright 2005-2020 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
  }
  