text: /*
   * Copyright 2009-2019 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 <unistd.h>
  #if defined(__linux) || defined(_AIX)
  # include <sys/utsname.h>
  #endif
  #if defined(_AIX53)     /* defined even on post-5.3 */
  # include <sys/systemcfg.h>
  # if !defined(__power_set)
  #  define __power_set(a) (_system_configuration.implementation & (a))
  # endif
  #endif
  #if defined(__APPLE__) && defined(__MACH__)
  # include <sys/types.h>
  # include <sys/sysctl.h>
  #endif
  #include <openssl/crypto.h>
  #include <openssl/bn.h>
  #include <internal/cryptlib.h>
  #include <internal/chacha.h>
  #include "bn/bn_lcl.h"
  
  #include "ppc_arch.h"
  
  unsigned int OPENSSL_ppccap_P = 0;
  
  static sigset_t all_masked;
  
  #ifdef OPENSSL_BN_ASM_MONT
  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_int(BN_ULONG *rp, const BN_ULONG *ap, const BN_ULONG *bp,
                          const BN_ULONG *np, const BN_ULONG *n0, int num);
      int bn_mul4x_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 < 4)
          return 0;
  
      if ((num & 3) == 0)
          return bn_mul4x_mont_int(rp, ap, bp, np, n0, num);
  
      /*
       * There used to be [optional] call to bn_mul_mont_fpu64 here,
       * but above subroutine is faster on contemporary processors.
       * Formulation means that there might be old processors where
       * FPU code path would be faster, POWER6 perhaps, but there was
       * no opportunity to figure it out...
       */
  
      return bn_mul_mont_int(rp, ap, bp, np, n0, num);
  }
  #endif
  
  void sha256_block_p8(void *ctx, const void *inp, size_t len);
  void sha256_block_ppc(void *ctx, const void *inp, size_t len);
  void sha256_block_data_order(void *ctx, const void *inp, size_t len);
  void sha256_block_data_order(void *ctx, const void *inp, size_t len)
  {
      OPENSSL_ppccap_P & PPC_CRYPTO207 ? sha256_block_p8(ctx, inp, len) :
          sha256_block_ppc(ctx, inp, len);
  }
  
  void sha512_block_p8(void *ctx, const void *inp, size_t len);
  void sha512_block_ppc(void *ctx, const void *inp, size_t len);
  void sha512_block_data_order(void *ctx, const void *inp, size_t len);
  void sha512_block_data_order(void *ctx, const void *inp, size_t len)
  {
      OPENSSL_ppccap_P & PPC_CRYPTO207 ? sha512_block_p8(ctx, inp, len) :
          sha512_block_ppc(ctx, inp, len);
  }
  
  #ifndef OPENSSL_NO_CHACHA
  void ChaCha20_ctr32_int(unsigned char *out, const unsigned char *inp,
                          size_t len, const unsigned int key[8],
                          const unsigned int counter[4]);
  void ChaCha20_ctr32_vmx(unsigned char *out, const unsigned char *inp,
                          size_t len, const unsigned int key[8],
                          const unsigned int counter[4]);
  void ChaCha20_ctr32_vsx(unsigned char *out, const unsigned char *inp,
                          size_t len, const unsigned int key[8],
                          const unsigned int counter[4]);
  void ChaCha20_ctr32(unsigned char *out, const unsigned char *inp,
                      size_t len, const unsigned int key[8],
                      const unsigned int counter[4])
  {
      OPENSSL_ppccap_P & PPC_CRYPTO207
          ? ChaCha20_ctr32_vsx(out, inp, len, key, counter)
          : OPENSSL_ppccap_P & PPC_ALTIVEC
              ? ChaCha20_ctr32_vmx(out, inp, len, key, counter)
              : ChaCha20_ctr32_int(out, inp, len, key, counter);
  }
  #endif
  
  #ifndef OPENSSL_NO_POLY1305
  void poly1305_init_int(void *ctx, const unsigned char key[16]);
  void poly1305_blocks(void *ctx, const unsigned char *inp, size_t len,
                           unsigned int padbit);
  void poly1305_emit(void *ctx, unsigned char mac[16],
                         const unsigned int nonce[4]);
  void poly1305_init_fpu(void *ctx, const unsigned char key[16]);
  void poly1305_blocks_fpu(void *ctx, const unsigned char *inp, size_t len,
                           unsigned int padbit);
  void poly1305_emit_fpu(void *ctx, unsigned char mac[16],
                         const unsigned int nonce[4]);
  int poly1305_init(void *ctx, const unsigned char key[16], void *func[2]);
  int poly1305_init(void *ctx, const unsigned char key[16], void *func[2])
  {
      if (sizeof(size_t) == 4 && (OPENSSL_ppccap_P & PPC_FPU)) {
          poly1305_init_fpu(ctx, key);
          func[0] = (void*)(uintptr_t)poly1305_blocks_fpu;
          func[1] = (void*)(uintptr_t)poly1305_emit_fpu;
      } else {
          poly1305_init_int(ctx, key);
          func[0] = (void*)(uintptr_t)poly1305_blocks;
          func[1] = (void*)(uintptr_t)poly1305_emit;
      }
      return 1;
  }
  #endif
  
  #ifdef ECP_NISTZ256_ASM
  void ecp_nistz256_mul_mont(unsigned long res[4], const unsigned long a[4],
                             const unsigned long b[4]);
  
  void ecp_nistz256_to_mont(unsigned long res[4], const unsigned long in[4]);
  void ecp_nistz256_to_mont(unsigned long res[4], const unsigned long in[4])
  {
      static const unsigned long RR[] = { 0x0000000000000003U,
                                          0xfffffffbffffffffU,
                                          0xfffffffffffffffeU,
                                          0x00000004fffffffdU };
  
      ecp_nistz256_mul_mont(res, in, RR);
  }
  
  void ecp_nistz256_from_mont(unsigned long res[4], const unsigned long in[4]);
  void ecp_nistz256_from_mont(unsigned long res[4], const unsigned long in[4])
  {
      static const unsigned long one[] = { 1, 0, 0, 0 };
  
      ecp_nistz256_mul_mont(res, in, one);
  }
  #endif
  
  static sigjmp_buf ill_jmp;
  static void ill_handler(int sig)
  {
      siglongjmp(ill_jmp, sig);
  }
  
  void OPENSSL_fpu_probe(void);
  void OPENSSL_ppc64_probe(void);
  void OPENSSL_altivec_probe(void);
  void OPENSSL_crypto207_probe(void);
  void OPENSSL_madd300_probe(void);
  
  long OPENSSL_rdtsc_mftb(void);
  long OPENSSL_rdtsc_mfspr268(void);
  
  uint32_t OPENSSL_rdtsc(void)
  {
      if (OPENSSL_ppccap_P & PPC_MFTB)
          return OPENSSL_rdtsc_mftb();
      else if (OPENSSL_ppccap_P & PPC_MFSPR268)
          return OPENSSL_rdtsc_mfspr268();
      else
          return 0;
  }
  
  size_t OPENSSL_instrument_bus_mftb(unsigned int *, size_t);
  size_t OPENSSL_instrument_bus_mfspr268(unsigned int *, size_t);
  
  size_t OPENSSL_instrument_bus(unsigned int *out, size_t cnt)
  {
      if (OPENSSL_ppccap_P & PPC_MFTB)
          return OPENSSL_instrument_bus_mftb(out, cnt);
      else if (OPENSSL_ppccap_P & PPC_MFSPR268)
          return OPENSSL_instrument_bus_mfspr268(out, cnt);
      else
          return 0;
  }
  
  size_t OPENSSL_instrument_bus2_mftb(unsigned int *, size_t, size_t);
  size_t OPENSSL_instrument_bus2_mfspr268(unsigned int *, size_t, size_t);
  
  size_t OPENSSL_instrument_bus2(unsigned int *out, size_t cnt, size_t max)
  {
      if (OPENSSL_ppccap_P & PPC_MFTB)
          return OPENSSL_instrument_bus2_mftb(out, cnt, max);
      else if (OPENSSL_ppccap_P & PPC_MFSPR268)
          return OPENSSL_instrument_bus2_mfspr268(out, cnt, max);
      else
          return 0;
  }
  
  #if defined(__GLIBC__) && defined(__GLIBC_PREREQ)
  # if __GLIBC_PREREQ(2, 16)
  #  include <sys/auxv.h>
  #  define OSSL_IMPLEMENT_GETAUXVAL
  # endif
  #endif
  
  /* I wish <sys/auxv.h> was universally available */
  #define HWCAP                   16      /* AT_HWCAP */
  #define HWCAP_PPC64             (1U << 30)
  #define HWCAP_ALTIVEC           (1U << 28)
  #define HWCAP_FPU               (1U << 27)
  #define HWCAP_POWER6_EXT        (1U << 9)
  #define HWCAP_VSX               (1U << 7)
  
  #define HWCAP2                  26      /* AT_HWCAP2 */
  #define HWCAP_VEC_CRYPTO        (1U << 25)
  #define HWCAP_ARCH_3_00         (1U << 23)
  
  # if defined(__GNUC__) && __GNUC__>=2
  __attribute__ ((constructor))
  # endif
  void OPENSSL_cpuid_setup(void)
  {
  #if 1 /* FIX_NO_SIGACTION BY EUNBIN */
  	return;
  #endif
  
      char *e;
      struct sigaction ill_oact, ill_act;
      sigset_t oset;
      static int trigger = 0;
  
      if (trigger)
          return;
      trigger = 1;
  
      if ((e = getenv("OPENSSL_ppccap"))) {
          OPENSSL_ppccap_P = strtoul(e, NULL, 0);
          return;
      }
  
      OPENSSL_ppccap_P = 0;
  
  #if defined(_AIX)
      OPENSSL_ppccap_P |= PPC_FPU;
  
      if (sizeof(size_t) == 4) {
          struct utsname uts;
  # if defined(_SC_AIX_KERNEL_BITMODE)
          if (sysconf(_SC_AIX_KERNEL_BITMODE) != 64)
              return;
  # endif
          if (uname(&uts) != 0 || atoi(uts.version) < 6)
              return;
      }
  
  # if defined(__power_set)
      /*
       * Value used in __power_set is a single-bit 1<<n one denoting
       * specific processor class. Incidentally 0xffffffff<<n can be
       * used to denote specific processor and its successors.
       */
      if (sizeof(size_t) == 4) {
          /* In 32-bit case PPC_FPU64 is always fastest [if option] */
          if (__power_set(0xffffffffU<<13))       /* POWER5 and later */
              OPENSSL_ppccap_P |= PPC_FPU64;
      } else {
          /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */
          if (__power_set(0x1U<<14))              /* POWER6 */
              OPENSSL_ppccap_P |= PPC_FPU64;
      }
  
      if (__power_set(0xffffffffU<<14))           /* POWER6 and later */
          OPENSSL_ppccap_P |= PPC_ALTIVEC;
  
      if (__power_set(0xffffffffU<<16))           /* POWER8 and later */
          OPENSSL_ppccap_P |= PPC_CRYPTO207;
  
      if (__power_set(0xffffffffU<<17))           /* POWER9 and later */
          OPENSSL_ppccap_P |= PPC_MADD300;
  
      return;
  # endif
  #endif
  
  #if defined(__APPLE__) && defined(__MACH__)
      OPENSSL_ppccap_P |= PPC_FPU;
  
      {
          int val;
          size_t len = sizeof(val);
  
          if (sysctlbyname("hw.optional.64bitops", &val, &len, NULL, 0) == 0) {
              if (val)
                  OPENSSL_ppccap_P |= PPC_FPU64;
          }
  
          len = sizeof(val);
          if (sysctlbyname("hw.optional.altivec", &val, &len, NULL, 0) == 0) {
              if (val)
                  OPENSSL_ppccap_P |= PPC_ALTIVEC;
          }
  
          return;
      }
  #endif
  
  #ifdef OSSL_IMPLEMENT_GETAUXVAL
      {
          unsigned long hwcap = getauxval(HWCAP);
          unsigned long hwcap2 = getauxval(HWCAP2);
  
          if (hwcap & HWCAP_FPU) {
              OPENSSL_ppccap_P |= PPC_FPU;
  
              if (sizeof(size_t) == 4) {
                  /* In 32-bit case PPC_FPU64 is always fastest [if option] */
                  if (hwcap & HWCAP_PPC64)
                      OPENSSL_ppccap_P |= PPC_FPU64;
              } else {
                  /* In 64-bit case PPC_FPU64 is fastest only on POWER6 */
                  if (hwcap & HWCAP_POWER6_EXT)
                      OPENSSL_ppccap_P |= PPC_FPU64;
              }
          }
  
          if (hwcap & HWCAP_ALTIVEC) {
              OPENSSL_ppccap_P |= PPC_ALTIVEC;
  
              if ((hwcap & HWCAP_VSX) && (hwcap2 & HWCAP_VEC_CRYPTO))
                  OPENSSL_ppccap_P |= PPC_CRYPTO207;
          }
  
          if (hwcap2 & HWCAP_ARCH_3_00) {
              OPENSSL_ppccap_P |= PPC_MADD300;
          }
      }
  #endif
  
      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);
  
      memset(&ill_act, 0, sizeof(ill_act));
      ill_act.sa_handler = ill_handler;
      ill_act.sa_mask = all_masked;
  
      sigprocmask(SIG_SETMASK, &ill_act.sa_mask, &oset);
      sigaction(SIGILL, &ill_act, &ill_oact);
  
  #ifndef OSSL_IMPLEMENT_GETAUXVAL
      if (sigsetjmp(ill_jmp,1) == 0) {
          OPENSSL_fpu_probe();
          OPENSSL_ppccap_P |= PPC_FPU;
  
          if (sizeof(size_t) == 4) {
  # ifdef __linux
              struct utsname uts;
              if (uname(&uts) == 0 && strcmp(uts.machine, "ppc64") == 0)
  # endif
                  if (sigsetjmp(ill_jmp, 1) == 0) {
                      OPENSSL_ppc64_probe();
                      OPENSSL_ppccap_P |= PPC_FPU64;
                  }
          } else {
              /*
               * Wanted code detecting POWER6 CPU and setting PPC_FPU64
               */
          }
      }
  
      if (sigsetjmp(ill_jmp, 1) == 0) {
          OPENSSL_altivec_probe();
          OPENSSL_ppccap_P |= PPC_ALTIVEC;
          if (sigsetjmp(ill_jmp, 1) == 0) {
              OPENSSL_crypto207_probe();
              OPENSSL_ppccap_P |= PPC_CRYPTO207;
          }
      }
  
      if (sigsetjmp(ill_jmp, 1) == 0) {
          OPENSSL_madd300_probe();
          OPENSSL_ppccap_P |= PPC_MADD300;
      }
  #endif
  
      if (sigsetjmp(ill_jmp, 1) == 0) {
          OPENSSL_rdtsc_mftb();
          OPENSSL_ppccap_P |= PPC_MFTB;
      } else if (sigsetjmp(ill_jmp, 1) == 0) {
          OPENSSL_rdtsc_mfspr268();
          OPENSSL_ppccap_P |= PPC_MFSPR268;
      }
  
      sigaction(SIGILL, &ill_oact, NULL);
      sigprocmask(SIG_SETMASK, &oset, NULL);
  }
  