| /* |
| * Copyright 2009-2021 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 <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 "internal/cryptlib.h" |
| #include "crypto/ppc_arch.h" |
| |
| unsigned int OPENSSL_ppccap_P = 0; |
| |
| static sigset_t all_masked; |
| |
| 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); |
| void OPENSSL_brd31_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 |
| # elif defined(__ANDROID_API__) |
| /* see https://developer.android.google.cn/ndk/guides/cpu-features */ |
| # if __ANDROID_API__ >= 18 |
| # include <sys/auxv.h> |
| # define OSSL_IMPLEMENT_GETAUXVAL |
| # endif |
| # endif |
| #endif |
| |
| #if defined(__FreeBSD__) |
| # include <sys/param.h> |
| # if __FreeBSD_version >= 1200000 |
| # include <sys/auxv.h> |
| # define OSSL_IMPLEMENT_GETAUXVAL |
| |
| static unsigned long getauxval(unsigned long key) |
| { |
| unsigned long val = 0ul; |
| |
| if (elf_aux_info((int)key, &val, sizeof(val)) != 0) |
| return 0ul; |
| |
| return val; |
| } |
| # endif |
| #endif |
| |
| /* I wish <sys/auxv.h> was universally available */ |
| #ifndef AT_HWCAP |
| # define AT_HWCAP 16 /* AT_HWCAP */ |
| #endif |
| #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) |
| |
| #ifndef AT_HWCAP2 |
| # define AT_HWCAP2 26 /* AT_HWCAP2 */ |
| #endif |
| #define HWCAP_VEC_CRYPTO (1U << 25) |
| #define HWCAP_ARCH_3_00 (1U << 23) |
| #define HWCAP_ARCH_3_1 (1U << 18) |
| |
| # if defined(__GNUC__) && __GNUC__>=2 |
| __attribute__ ((constructor)) |
| # endif |
| void OPENSSL_cpuid_setup(void) |
| { |
| 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; |
| |
| if (__power_set(0xffffffffU<<18)) /* POWER10 and later */ |
| OPENSSL_ppccap_P |= PPC_BRD31; |
| |
| 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(AT_HWCAP); |
| unsigned long hwcap2 = getauxval(AT_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; |
| } |
| |
| if (hwcap2 & HWCAP_ARCH_3_1) { |
| OPENSSL_ppccap_P |= PPC_BRD31; |
| } |
| } |
| #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); |
| } |
