long sysconf(int name) {
switch (name) {
//
// Things we actually have to calculate...
//
case _SC_ARG_MAX:
// Not a constant since Linux 2.6.23; see fs/exec.c for details.
// At least 32 pages, otherwise a quarter of the stack limit.
return MAX(__sysconf_rlimit(RLIMIT_STACK) / 4, _KERNEL_ARG_MAX);
case _SC_AVPHYS_PAGES: return get_avphys_pages();
case _SC_CHILD_MAX: return __sysconf_rlimit(RLIMIT_NPROC);
case _SC_CLK_TCK: return static_cast<long>(getauxval(AT_CLKTCK));
case _SC_NPROCESSORS_CONF: return get_nprocs_conf();
case _SC_NPROCESSORS_ONLN: return get_nprocs();
case _SC_OPEN_MAX: return __sysconf_rlimit(RLIMIT_NOFILE);
case _SC_PAGESIZE:
case _SC_PAGE_SIZE:
// _SC_PAGESIZE and _SC_PAGE_SIZE are distinct, but return the same value.
return static_cast<long>(getauxval(AT_PAGESZ));
case _SC_PHYS_PAGES: return get_phys_pages();
//
// Constants...
//
case _SC_BC_BASE_MAX: return _POSIX2_BC_BASE_MAX; // Minimum requirement.
case _SC_BC_DIM_MAX: return _POSIX2_BC_DIM_MAX; // Minimum requirement.
case _SC_BC_SCALE_MAX: return _POSIX2_BC_SCALE_MAX; // Minimum requirement.
case _SC_BC_STRING_MAX: return _POSIX2_BC_STRING_MAX; // Minimum requirement.
case _SC_COLL_WEIGHTS_MAX: return _POSIX2_COLL_WEIGHTS_MAX; // Minimum requirement.
case _SC_EXPR_NEST_MAX: return _POSIX2_EXPR_NEST_MAX; // Minimum requirement.
case _SC_LINE_MAX: return _POSIX2_LINE_MAX; // Minimum requirement.
case _SC_NGROUPS_MAX: return NGROUPS_MAX;
case _SC_PASS_MAX: return PASS_MAX;
case _SC_2_C_BIND: return _POSIX2_C_BIND;
case _SC_2_C_DEV: return _POSIX2_C_DEV;
case _SC_2_CHAR_TERM: return _POSIX2_CHAR_TERM;
case _SC_2_FORT_DEV: return -1;
case _SC_2_FORT_RUN: return -1;
case _SC_2_LOCALEDEF: return _POSIX2_LOCALEDEF;
case _SC_2_SW_DEV: return _POSIX2_SW_DEV;
case _SC_2_UPE: return _POSIX2_UPE;
case _SC_2_VERSION: return _POSIX2_VERSION;
case _SC_JOB_CONTROL: return _POSIX_JOB_CONTROL;
case _SC_SAVED_IDS: return _POSIX_SAVED_IDS;
case _SC_VERSION: return _POSIX_VERSION;
case _SC_RE_DUP_MAX: return _POSIX_RE_DUP_MAX; // Minimum requirement.
case _SC_STREAM_MAX: return FOPEN_MAX;
case _SC_TZNAME_MAX: return _POSIX_TZNAME_MAX; // Minimum requirement.
case _SC_XOPEN_CRYPT: return _XOPEN_CRYPT;
case _SC_XOPEN_ENH_I18N: return _XOPEN_ENH_I18N;
case _SC_XOPEN_SHM: return _XOPEN_SHM;
case _SC_XOPEN_VERSION: return _XOPEN_VERSION;
case _SC_XOPEN_REALTIME: return _XOPEN_REALTIME;
case _SC_XOPEN_REALTIME_THREADS: return _XOPEN_REALTIME_THREADS;
case _SC_XOPEN_LEGACY: return _XOPEN_LEGACY;
case _SC_ATEXIT_MAX: return LONG_MAX; // Unlimited.
case _SC_IOV_MAX: return IOV_MAX;
case _SC_XOPEN_UNIX: return _XOPEN_UNIX;
case _SC_AIO_LISTIO_MAX: return _POSIX_AIO_LISTIO_MAX; // Minimum requirement.
case _SC_AIO_MAX: return _POSIX_AIO_MAX; // Minimum requirement.
case _SC_AIO_PRIO_DELTA_MAX:return 0; // Minimum requirement.
case _SC_DELAYTIMER_MAX: return INT_MAX;
case _SC_MQ_OPEN_MAX: return _POSIX_MQ_OPEN_MAX; // Minimum requirement.
case _SC_MQ_PRIO_MAX: return _POSIX_MQ_PRIO_MAX; // Minimum requirement.
case _SC_RTSIG_MAX: return RTSIG_MAX;
case _SC_SEM_NSEMS_MAX: return _POSIX_SEM_NSEMS_MAX; // Minimum requirement.
case _SC_SEM_VALUE_MAX: return SEM_VALUE_MAX;
case _SC_SIGQUEUE_MAX: return _POSIX_SIGQUEUE_MAX; // Minimum requirement.
case _SC_TIMER_MAX: return _POSIX_TIMER_MAX; // Minimum requirement.
case _SC_ASYNCHRONOUS_IO: return _POSIX_ASYNCHRONOUS_IO;
case _SC_FSYNC: return _POSIX_FSYNC;
case _SC_MAPPED_FILES: return _POSIX_MAPPED_FILES;
case _SC_MEMLOCK: return _POSIX_MEMLOCK;
case _SC_MEMLOCK_RANGE: return _POSIX_MEMLOCK_RANGE;
case _SC_MEMORY_PROTECTION: return _POSIX_MEMORY_PROTECTION;
case _SC_MESSAGE_PASSING: return _POSIX_MESSAGE_PASSING;
case _SC_PRIORITIZED_IO: return _POSIX_PRIORITIZED_IO;
case _SC_PRIORITY_SCHEDULING: return _POSIX_PRIORITY_SCHEDULING;
case _SC_REALTIME_SIGNALS: return _POSIX_REALTIME_SIGNALS;
case _SC_SEMAPHORES: return _POSIX_SEMAPHORES;
case _SC_SHARED_MEMORY_OBJECTS: return _POSIX_SHARED_MEMORY_OBJECTS;
case _SC_SYNCHRONIZED_IO: return _POSIX_SYNCHRONIZED_IO;
case _SC_TIMERS: return _POSIX_TIMERS;
case _SC_GETGR_R_SIZE_MAX: return 1024;
case _SC_GETPW_R_SIZE_MAX: return 1024;
case _SC_LOGIN_NAME_MAX: return 256; // Seems default on linux.
case _SC_THREAD_DESTRUCTOR_ITERATIONS: return PTHREAD_DESTRUCTOR_ITERATIONS;
case _SC_THREAD_KEYS_MAX: return PTHREAD_KEYS_MAX;
case _SC_THREAD_STACK_MIN: return PTHREAD_STACK_MIN;
case _SC_THREAD_THREADS_MAX: return -1; // No specific limit.
case _SC_TTY_NAME_MAX: return 32; // Seems default on linux.
case _SC_THREADS: return _POSIX_THREADS;
case _SC_THREAD_ATTR_STACKADDR: return _POSIX_THREAD_ATTR_STACKADDR;
case _SC_THREAD_ATTR_STACKSIZE: return _POSIX_THREAD_ATTR_STACKSIZE;
case _SC_THREAD_PRIORITY_SCHEDULING: return _POSIX_THREAD_PRIORITY_SCHEDULING;
case _SC_THREAD_PRIO_INHERIT: return _POSIX_THREAD_PRIO_INHERIT;
case _SC_THREAD_PRIO_PROTECT: return _POSIX_THREAD_PRIO_PROTECT;
case _SC_THREAD_SAFE_FUNCTIONS: return _POSIX_THREAD_SAFE_FUNCTIONS;
case _SC_MONOTONIC_CLOCK: return _POSIX_VERSION;
case _SC_2_PBS: return -1; // Obsolescent in POSIX.1-2008.
case _SC_2_PBS_ACCOUNTING: return -1; // Obsolescent in POSIX.1-2008.
case _SC_2_PBS_CHECKPOINT: return -1; // Obsolescent in POSIX.1-2008.
case _SC_2_PBS_LOCATE: return -1; // Obsolescent in POSIX.1-2008.
case _SC_2_PBS_MESSAGE: return -1; // Obsolescent in POSIX.1-2008.
case _SC_2_PBS_TRACK: return -1; // Obsolescent in POSIX.1-2008.
case _SC_ADVISORY_INFO: return _POSIX_ADVISORY_INFO;
case _SC_BARRIERS: return _POSIX_BARRIERS;
case _SC_CLOCK_SELECTION: return _POSIX_CLOCK_SELECTION;
case _SC_CPUTIME: return _POSIX_VERSION;
case _SC_HOST_NAME_MAX: return _POSIX_HOST_NAME_MAX; // Minimum requirement.
case _SC_IPV6: return _POSIX_IPV6;
case _SC_RAW_SOCKETS: return _POSIX_RAW_SOCKETS;
case _SC_READER_WRITER_LOCKS: return _POSIX_READER_WRITER_LOCKS;
case _SC_REGEXP: return _POSIX_REGEXP;
case _SC_SHELL: return _POSIX_SHELL;
case _SC_SPAWN: return _POSIX_SPAWN;
case _SC_SPIN_LOCKS: return _POSIX_SPIN_LOCKS;
case _SC_SPORADIC_SERVER: return _POSIX_SPORADIC_SERVER;
case _SC_SS_REPL_MAX: return -1;
case _SC_SYMLOOP_MAX: return _POSIX_SYMLOOP_MAX; // Minimum requirement.
case _SC_THREAD_CPUTIME: return _POSIX_VERSION;
case _SC_THREAD_PROCESS_SHARED: return _POSIX_THREAD_PROCESS_SHARED;
case _SC_THREAD_ROBUST_PRIO_INHERIT: return _POSIX_THREAD_ROBUST_PRIO_INHERIT;
case _SC_THREAD_ROBUST_PRIO_PROTECT: return _POSIX_THREAD_ROBUST_PRIO_PROTECT;
case _SC_THREAD_SPORADIC_SERVER: return _POSIX_THREAD_SPORADIC_SERVER;
case _SC_TIMEOUTS: return _POSIX_TIMEOUTS;
case _SC_TRACE: return -1; // Obsolescent in POSIX.1-2008.
case _SC_TRACE_EVENT_FILTER: return -1; // Obsolescent in POSIX.1-2008.
case _SC_TRACE_EVENT_NAME_MAX: return -1;
case _SC_TRACE_INHERIT: return -1; // Obsolescent in POSIX.1-2008.
case _SC_TRACE_LOG: return -1; // Obsolescent in POSIX.1-2008.
case _SC_TRACE_NAME_MAX: return -1;
case _SC_TRACE_SYS_MAX: return -1;
case _SC_TRACE_USER_EVENT_MAX: return -1;
case _SC_TYPED_MEMORY_OBJECTS: return _POSIX_TYPED_MEMORY_OBJECTS;
case _SC_V7_ILP32_OFF32: return _POSIX_V7_ILP32_OFF32;
case _SC_V7_ILP32_OFFBIG: return _POSIX_V7_ILP32_OFFBIG;
case _SC_V7_LP64_OFF64: return _POSIX_V7_LP64_OFF64;
case _SC_V7_LPBIG_OFFBIG: return _POSIX_V7_LPBIG_OFFBIG;
case _SC_XOPEN_STREAMS: return -1; // Obsolescent in POSIX.1-2008.
case _SC_XOPEN_UUCP: return -1;
// We do not have actual implementations for cache queries.
// It's valid to return 0 as the result is unknown.
case _SC_LEVEL1_ICACHE_SIZE: return 0;
case _SC_LEVEL1_ICACHE_ASSOC: return 0;
case _SC_LEVEL1_ICACHE_LINESIZE: return 0;
case _SC_LEVEL1_DCACHE_SIZE: return 0;
case _SC_LEVEL1_DCACHE_ASSOC: return 0;
case _SC_LEVEL1_DCACHE_LINESIZE: return 0;
case _SC_LEVEL2_CACHE_SIZE: return 0;
case _SC_LEVEL2_CACHE_ASSOC: return 0;
case _SC_LEVEL2_CACHE_LINESIZE: return 0;
case _SC_LEVEL3_CACHE_SIZE: return 0;
case _SC_LEVEL3_CACHE_ASSOC: return 0;
case _SC_LEVEL3_CACHE_LINESIZE: return 0;
case _SC_LEVEL4_CACHE_SIZE: return 0;
case _SC_LEVEL4_CACHE_ASSOC: return 0;
case _SC_LEVEL4_CACHE_LINESIZE: return 0;
default:
// Posix says EINVAL is the only error that shall be returned,
// but glibc uses ENOSYS.
errno = ENOSYS;
return -1;
}
}
int main (int argc, char* argv[])
{
char parent_process_path_buf[128];
sprintf(parent_process_path_buf, "/proc/%d/cmdline", getppid());
std::ifstream parent_cmdline;
parent_cmdline.open(parent_process_path_buf);
std::string parent_cmdline_str;
std::getline(parent_cmdline, parent_cmdline_str);
parent_cmdline.close();
std::cout <<(char *)getauxval(AT_EXECFN) << " pid " << getpid() << " Parent PID is " << getppid() << " " <<parent_cmdline_str << " " <<currentDateTime() << std::endl;
usleep(1000000* (rand()%10+1));
std::cout <<get_process_name(getpid()) << " pid " << getpid() << " Parent PID is " << getppid() << " " <<parent_cmdline_str << " " <<currentDateTime() << std::endl;
std::cout << "Resource size is " << (size_t)&_binary_main_cpp_size<<std::endl;
std::string src(&_binary_main_cpp_start,(size_t)( &_binary_main_cpp_end-&_binary_main_cpp_start));
ACE_Argv_Type_Converter to_tchar (argc, argv);
ACE_Get_Opt get_opt (argc,
to_tchar.get_TCHAR_argv (),
ACE_TEXT ("msad:"), 1, 0);
//ACE_Get_Opt get_opt (argc,argv, ACE_TEXT ("P"), 1, 0);
for (int c; (c = get_opt ()) != -1; )
switch (c)
{
case 's': // print source code
std::cout <<src << std::endl;
break;
case 'm': // print free memory information
{
std::cout << "Parent process is " << get_process_name(getppid()) << std::endl;
std::string ss=runcmd("free -m");
std::cout << ss <<std::endl;
}
break;
case 'a': // test ACE_Argv_Type_Converter
{
ACE_ARGV_T<char> argslist;
argslist.add("abc def ghi");
argslist.add("4th");
argslist.add("5th");
int newargc=argslist.argc();
ACE_Argv_Type_Converter cmdline(newargc, argslist.argv());
char** newargs=cmdline.get_ASCII_argv();
std::cout << "arg count " << argslist.argc()<<std::endl;
for(int i=0; i<newargc;i++)
std::cout<< "argv["<<i<<"] " << newargs[i]<<std::endl;
}
break;
case 'd': // compare performance of itoa and sprintf
{
int cnt = ACE_OS::atoi(get_opt.opt_arg ());
uint64_t perf1start= getCurrentMillis();
char buf[16];
for(int i=0; i<cnt; i++)
itoa(i, buf, 10);
uint64_t perf2start= getCurrentMillis();
for(int i=0; i<cnt; i++)
sprintf(buf, "%d", i);
uint64_t perf2stop= getCurrentMillis();
std::cout << "convert "<<cnt<<" int to string by itoa in "
<< (perf2start-perf1start) << " milliseconds, sprintf in "
<< (perf2stop-perf2start) << " milliseconds\n";
}
break;
default:
break;
}
return 0;
}
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_armcap"))) {
OPENSSL_armcap_P = (unsigned int)strtoul(e, NULL, 0);
return;
}
sigfillset(&all_masked);
sigdelset(&all_masked, SIGILL);
sigdelset(&all_masked, SIGTRAP);
sigdelset(&all_masked, SIGFPE);
sigdelset(&all_masked, SIGBUS);
sigdelset(&all_masked, SIGSEGV);
OPENSSL_armcap_P = 0;
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);
if (getauxval != NULL) {
if (getauxval(HWCAP) & HWCAP_NEON) {
unsigned long hwcap = getauxval(HWCAP_CE);
OPENSSL_armcap_P |= ARMV7_NEON;
if (hwcap & HWCAP_CE_AES)
OPENSSL_armcap_P |= ARMV8_AES;
if (hwcap & HWCAP_CE_PMULL)
OPENSSL_armcap_P |= ARMV8_PMULL;
if (hwcap & HWCAP_CE_SHA1)
OPENSSL_armcap_P |= ARMV8_SHA1;
if (hwcap & HWCAP_CE_SHA256)
OPENSSL_armcap_P |= ARMV8_SHA256;
}
} else if (sigsetjmp(ill_jmp, 1) == 0) {
_armv7_neon_probe();
OPENSSL_armcap_P |= ARMV7_NEON;
if (sigsetjmp(ill_jmp, 1) == 0) {
_armv8_pmull_probe();
OPENSSL_armcap_P |= ARMV8_PMULL | ARMV8_AES;
} else if (sigsetjmp(ill_jmp, 1) == 0) {
_armv8_aes_probe();
OPENSSL_armcap_P |= ARMV8_AES;
}
if (sigsetjmp(ill_jmp, 1) == 0) {
_armv8_sha1_probe();
OPENSSL_armcap_P |= ARMV8_SHA1;
}
if (sigsetjmp(ill_jmp, 1) == 0) {
_armv8_sha256_probe();
OPENSSL_armcap_P |= ARMV8_SHA256;
}
}
if (sigsetjmp(ill_jmp, 1) == 0) {
_armv7_tick();
OPENSSL_armcap_P |= ARMV7_TICK;
}
sigaction(SIGILL, &ill_oact, NULL);
sigprocmask(SIG_SETMASK, &oset, NULL);
}
void OPENSSL_cpuid_setup(void)
{
const char *e;
struct sigaction ill_oact, ill_act;
sigset_t oset;
static int trigger = 0;
if (trigger)
return;
trigger = 1;
if ((e = getenv("OPENSSL_armcap"))) {
OPENSSL_armcap_P = (unsigned int)strtoul(e, NULL, 0);
return;
}
# if defined(__APPLE__) && !defined(__aarch64__)
/*
* Capability probing by catching SIGILL appears to be problematic
* on iOS. But since Apple universe is "monocultural", it's actually
* possible to simply set pre-defined processor capability mask.
*/
if (1) {
OPENSSL_armcap_P = ARMV7_NEON;
return;
}
/*
* One could do same even for __aarch64__ iOS builds. It's not done
* exclusively for reasons of keeping code unified across platforms.
* Unified code works because it never triggers SIGILL on Apple
* devices...
*/
# endif
OPENSSL_armcap_P = 0;
# ifdef OSSL_IMPLEMENT_GETAUXVAL
if (getauxval(HWCAP) & HWCAP_NEON) {
unsigned long hwcap = getauxval(HWCAP_CE);
OPENSSL_armcap_P |= ARMV7_NEON;
if (hwcap & HWCAP_CE_AES)
OPENSSL_armcap_P |= ARMV8_AES;
if (hwcap & HWCAP_CE_PMULL)
OPENSSL_armcap_P |= ARMV8_PMULL;
if (hwcap & HWCAP_CE_SHA1)
OPENSSL_armcap_P |= ARMV8_SHA1;
if (hwcap & HWCAP_CE_SHA256)
OPENSSL_armcap_P |= ARMV8_SHA256;
# ifdef __aarch64__
if (hwcap & HWCAP_CE_SHA512)
OPENSSL_armcap_P |= ARMV8_SHA512;
# endif
}
# endif
sigfillset(&all_masked);
sigdelset(&all_masked, SIGILL);
sigdelset(&all_masked, SIGTRAP);
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);
/* If we used getauxval, we already have all the values */
# ifndef OSSL_IMPLEMENT_GETAUXVAL
if (sigsetjmp(ill_jmp, 1) == 0) {
_armv7_neon_probe();
OPENSSL_armcap_P |= ARMV7_NEON;
if (sigsetjmp(ill_jmp, 1) == 0) {
_armv8_pmull_probe();
OPENSSL_armcap_P |= ARMV8_PMULL | ARMV8_AES;
} else if (sigsetjmp(ill_jmp, 1) == 0) {
_armv8_aes_probe();
OPENSSL_armcap_P |= ARMV8_AES;
}
if (sigsetjmp(ill_jmp, 1) == 0) {
_armv8_sha1_probe();
OPENSSL_armcap_P |= ARMV8_SHA1;
}
if (sigsetjmp(ill_jmp, 1) == 0) {
_armv8_sha256_probe();
OPENSSL_armcap_P |= ARMV8_SHA256;
}
# if defined(__aarch64__) && !defined(__APPLE__)
if (sigsetjmp(ill_jmp, 1) == 0) {
_armv8_sha512_probe();
OPENSSL_armcap_P |= ARMV8_SHA512;
}
# endif
}
# endif
/* Things that getauxval didn't tell us */
if (sigsetjmp(ill_jmp, 1) == 0) {
_armv7_tick();
OPENSSL_armcap_P |= ARMV7_TICK;
}
sigaction(SIGILL, &ill_oact, NULL);
sigprocmask(SIG_SETMASK, &oset, NULL);
}
unsigned long qemu_getauxval(unsigned long key)
{
return getauxval(key);
}
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;
return;
# endif
#endif
if (getauxval != NULL) {
unsigned long hwcap = getauxval(HWCAP);
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) && (getauxval(HWCAP2) & HWCAP_VEC_CRYPTO))
OPENSSL_ppccap_P |= PPC_CRYPTO207;
}
if (hwcap & HWCAP_ARCH_3_00) {
OPENSSL_ppccap_P |= PPC_MADD300;
}
return;
}
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);
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;
}
sigaction(SIGILL, &ill_oact, NULL);
sigprocmask(SIG_SETMASK, &oset, NULL);
}
void GFp_cpuid_setup(void) {
char *cpuinfo_data;
size_t cpuinfo_len;
if (!read_file(&cpuinfo_data, &cpuinfo_len, "/proc/cpuinfo")) {
return;
}
STRING_PIECE cpuinfo;
cpuinfo.data = cpuinfo_data;
cpuinfo.len = cpuinfo_len;
/* |getauxval| is not available on Android until API level 20. If it is
* unavailable, read from /proc/self/auxv as a fallback. This is unreadable
* on some versions of Android, so further fall back to /proc/cpuinfo.
*
* See
* https://android.googlesource.com/platform/ndk/+/882ac8f3392858991a0e1af33b4b7387ec856bd2
* and b/13679666 (Google-internal) for details. */
unsigned long hwcap = 0;
if (getauxval != NULL) {
hwcap = getauxval(AT_HWCAP);
}
if (hwcap == 0) {
hwcap = getauxval_proc(AT_HWCAP);
}
if (hwcap == 0) {
hwcap = get_hwcap_cpuinfo(&cpuinfo);
}
/* Clear NEON support if known broken. */
g_has_broken_neon = has_broken_neon(&cpuinfo);
if (g_has_broken_neon) {
hwcap &= ~HWCAP_NEON;
}
/* Matching OpenSSL, only report other features if NEON is present. */
if (hwcap & HWCAP_NEON) {
GFp_armcap_P |= ARMV7_NEON;
/* Some ARMv8 Android devices don't expose AT_HWCAP2. Fall back to
* /proc/cpuinfo. See https://crbug.com/596156. */
unsigned long hwcap2 = 0;
if (getauxval != NULL) {
hwcap2 = getauxval(AT_HWCAP2);
}
if (hwcap2 == 0) {
hwcap2 = get_hwcap2_cpuinfo(&cpuinfo);
}
if (hwcap2 & HWCAP2_AES) {
GFp_armcap_P |= ARMV8_AES;
}
if (hwcap2 & HWCAP2_PMULL) {
GFp_armcap_P |= ARMV8_PMULL;
}
if (hwcap2 & HWCAP2_SHA1) {
GFp_armcap_P |= ARMV8_SHA1;
}
if (hwcap2 & HWCAP2_SHA2) {
GFp_armcap_P |= ARMV8_SHA256;
}
}
OPENSSL_free(cpuinfo_data);
}
// Returns the address of the next page after address 'x', unless 'x' is
// itself at the start of a page.
#define PAGE_END(x) PAGE_START((x) + (PAGE_SIZE-1))
extern "C" int __cxa_atexit(void (*)(void *), void *, void *);
static void call_array(void(**list)()) {
// First element is -1, list is null-terminated
while (*++list) {
(*list)();
}
}
static void apply_gnu_relro() {
ElfW(Phdr)* phdr_start = reinterpret_cast<ElfW(Phdr)*>(getauxval(AT_PHDR));
unsigned long int phdr_ct = getauxval(AT_PHNUM);
for (ElfW(Phdr)* phdr = phdr_start; phdr < (phdr_start + phdr_ct); phdr++) {
if (phdr->p_type != PT_GNU_RELRO) {
continue;
}
ElfW(Addr) seg_page_start = PAGE_START(phdr->p_vaddr);
ElfW(Addr) seg_page_end = PAGE_END(phdr->p_vaddr + phdr->p_memsz);
// Check return value here? What do we do if we fail?
mprotect(reinterpret_cast<void*>(seg_page_start), seg_page_end - seg_page_start, PROT_READ);
}
}
__noreturn void __libc_init(void* raw_args,
void VM_Version::get_processor_features() {
_supports_cx8 = true;
_supports_atomic_getset4 = true;
_supports_atomic_getadd4 = true;
_supports_atomic_getset8 = true;
_supports_atomic_getadd8 = true;
if (FLAG_IS_DEFAULT(AllocatePrefetchDistance))
FLAG_SET_DEFAULT(AllocatePrefetchDistance, 256);
if (FLAG_IS_DEFAULT(AllocatePrefetchStepSize))
FLAG_SET_DEFAULT(AllocatePrefetchStepSize, 64);
FLAG_SET_DEFAULT(PrefetchScanIntervalInBytes, 256);
FLAG_SET_DEFAULT(PrefetchFieldsAhead, 256);
FLAG_SET_DEFAULT(PrefetchCopyIntervalInBytes, 256);
FLAG_SET_DEFAULT(UseSSE42Intrinsics, true);
unsigned long auxv = getauxval(AT_HWCAP);
char buf[512];
_features = auxv;
int cpu_lines = 0;
if (FILE *f = fopen("/proc/cpuinfo", "r")) {
char buf[128], *p;
while (fgets(buf, sizeof (buf), f) != NULL) {
if (p = strchr(buf, ':')) {
long v = strtol(p+1, NULL, 0);
if (strncmp(buf, "CPU implementer", sizeof "CPU implementer" - 1) == 0) {
_cpu = v;
cpu_lines++;
} else if (strncmp(buf, "CPU variant", sizeof "CPU variant" - 1) == 0) {
_variant = v;
} else if (strncmp(buf, "CPU part", sizeof "CPU part" - 1) == 0) {
if (_model != v) _model2 = _model;
_model = v;
} else if (strncmp(buf, "CPU revision", sizeof "CPU revision" - 1) == 0) {
_revision = v;
}
}
}
fclose(f);
}
// Enable vendor specific features
if (_cpu == CPU_CAVIUM && _variant == 0) _features |= CPU_DMB_ATOMICS;
if (_cpu == CPU_ARM && (_model == 0xd03 || _model2 == 0xd03)) _features |= CPU_A53MAC;
// If an olde style /proc/cpuinfo (cpu_lines == 1) then if _model is an A57 (0xd07)
// we assume the worst and assume we could be on a big little system and have
// undisclosed A53 cores which we could be swapped to at any stage
if (_cpu == CPU_ARM && cpu_lines == 1 && _model == 0xd07) _features |= CPU_A53MAC;
sprintf(buf, "0x%02x:0x%x:0x%03x:%d", _cpu, _variant, _model, _revision);
if (_model2) sprintf(buf+strlen(buf), "(0x%03x)", _model2);
if (auxv & HWCAP_ASIMD) strcat(buf, ", simd");
if (auxv & HWCAP_CRC32) strcat(buf, ", crc");
if (auxv & HWCAP_AES) strcat(buf, ", aes");
if (auxv & HWCAP_SHA1) strcat(buf, ", sha1");
if (auxv & HWCAP_SHA2) strcat(buf, ", sha256");
_features_string = os::strdup(buf);
if (FLAG_IS_DEFAULT(UseCRC32)) {
UseCRC32 = (auxv & HWCAP_CRC32) != 0;
}
if (UseCRC32 && (auxv & HWCAP_CRC32) == 0) {
warning("UseCRC32 specified, but not supported on this CPU");
}
if (FLAG_IS_DEFAULT(UseAdler32Intrinsics)) {
FLAG_SET_DEFAULT(UseAdler32Intrinsics, true);
}
if (UseVectorizedMismatchIntrinsic) {
warning("UseVectorizedMismatchIntrinsic specified, but not available on this CPU.");
FLAG_SET_DEFAULT(UseVectorizedMismatchIntrinsic, false);
}
if (auxv & HWCAP_AES) {
UseAES = UseAES || FLAG_IS_DEFAULT(UseAES);
UseAESIntrinsics =
UseAESIntrinsics || (UseAES && FLAG_IS_DEFAULT(UseAESIntrinsics));
if (UseAESIntrinsics && !UseAES) {
warning("UseAESIntrinsics enabled, but UseAES not, enabling");
UseAES = true;
}
} else {
if (UseAES) {
warning("UseAES specified, but not supported on this CPU");
}
if (UseAESIntrinsics) {
warning("UseAESIntrinsics specified, but not supported on this CPU");
}
}
if (UseAESCTRIntrinsics) {
warning("AES/CTR intrinsics are not available on this CPU");
FLAG_SET_DEFAULT(UseAESCTRIntrinsics, false);
}
if (FLAG_IS_DEFAULT(UseCRC32Intrinsics)) {
UseCRC32Intrinsics = true;
}
if (auxv & HWCAP_CRC32) {
if (FLAG_IS_DEFAULT(UseCRC32CIntrinsics)) {
FLAG_SET_DEFAULT(UseCRC32CIntrinsics, true);
}
} else if (UseCRC32CIntrinsics) {
warning("CRC32C is not available on the CPU");
FLAG_SET_DEFAULT(UseCRC32CIntrinsics, false);
}
if (auxv & (HWCAP_SHA1 | HWCAP_SHA2)) {
if (FLAG_IS_DEFAULT(UseSHA)) {
FLAG_SET_DEFAULT(UseSHA, true);
}
} else if (UseSHA) {
warning("SHA instructions are not available on this CPU");
FLAG_SET_DEFAULT(UseSHA, false);
}
if (UseSHA && (auxv & HWCAP_SHA1)) {
if (FLAG_IS_DEFAULT(UseSHA1Intrinsics)) {
FLAG_SET_DEFAULT(UseSHA1Intrinsics, true);
}
} else if (UseSHA1Intrinsics) {
warning("Intrinsics for SHA-1 crypto hash functions not available on this CPU.");
FLAG_SET_DEFAULT(UseSHA1Intrinsics, false);
}
if (UseSHA && (auxv & HWCAP_SHA2)) {
if (FLAG_IS_DEFAULT(UseSHA256Intrinsics)) {
FLAG_SET_DEFAULT(UseSHA256Intrinsics, true);
}
} else if (UseSHA256Intrinsics) {
warning("Intrinsics for SHA-224 and SHA-256 crypto hash functions not available on this CPU.");
FLAG_SET_DEFAULT(UseSHA256Intrinsics, false);
}
if (UseSHA512Intrinsics) {
warning("Intrinsics for SHA-384 and SHA-512 crypto hash functions not available on this CPU.");
FLAG_SET_DEFAULT(UseSHA512Intrinsics, false);
}
if (!(UseSHA1Intrinsics || UseSHA256Intrinsics || UseSHA512Intrinsics)) {
FLAG_SET_DEFAULT(UseSHA, false);
}
if (auxv & HWCAP_PMULL) {
if (FLAG_IS_DEFAULT(UseGHASHIntrinsics)) {
FLAG_SET_DEFAULT(UseGHASHIntrinsics, true);
}
} else if (UseGHASHIntrinsics) {
warning("GHASH intrinsics are not available on this CPU");
FLAG_SET_DEFAULT(UseGHASHIntrinsics, false);
}
// This machine allows unaligned memory accesses
if (FLAG_IS_DEFAULT(UseUnalignedAccesses)) {
FLAG_SET_DEFAULT(UseUnalignedAccesses, true);
}
if (FLAG_IS_DEFAULT(UseMultiplyToLenIntrinsic)) {
UseMultiplyToLenIntrinsic = true;
}
if (FLAG_IS_DEFAULT(UseBarriersForVolatile)) {
UseBarriersForVolatile = (_features & CPU_DMB_ATOMICS) != 0;
}
if (FLAG_IS_DEFAULT(UsePopCountInstruction)) {
UsePopCountInstruction = true;
}
if (FLAG_IS_DEFAULT(UseMontgomeryMultiplyIntrinsic)) {
UseMontgomeryMultiplyIntrinsic = true;
}
if (FLAG_IS_DEFAULT(UseMontgomerySquareIntrinsic)) {
UseMontgomerySquareIntrinsic = true;
}
#ifdef COMPILER2
if (FLAG_IS_DEFAULT(OptoScheduling)) {
OptoScheduling = true;
}
#endif
}
static int
getentropy_fallback(void *buf, size_t len)
{
uint8_t results[SHA512_DIGEST_LENGTH];
int save_errno = errno, e, pgs = getpagesize(), faster = 0, repeat;
static int cnt;
struct timespec ts;
struct timeval tv;
struct rusage ru;
sigset_t sigset;
struct stat st;
SHA512_CTX ctx;
static pid_t lastpid;
pid_t pid;
size_t i, ii, m;
char *p;
pid = getpid();
if (lastpid == pid) {
faster = 1;
repeat = 2;
} else {
faster = 0;
lastpid = pid;
repeat = REPEAT;
}
for (i = 0; i < len; ) {
int j;
SHA512_Init(&ctx);
for (j = 0; j < repeat; j++) {
HX((e = gettimeofday(&tv, NULL)) == -1, tv);
if (e != -1) {
cnt += (int)tv.tv_sec;
cnt += (int)tv.tv_usec;
}
dl_iterate_phdr(getentropy_phdr, &ctx);
for (ii = 0; ii < sizeof(cl)/sizeof(cl[0]); ii++)
HX(clock_gettime(cl[ii], &ts) == -1, ts);
HX((pid = getpid()) == -1, pid);
HX((pid = getsid(pid)) == -1, pid);
HX((pid = getppid()) == -1, pid);
HX((pid = getpgid(0)) == -1, pid);
HX((e = getpriority(0, 0)) == -1, e);
if (!faster) {
ts.tv_sec = 0;
ts.tv_nsec = 1;
(void) nanosleep(&ts, NULL);
}
HX(sigpending(&sigset) == -1, sigset);
HX(sigprocmask(SIG_BLOCK, NULL, &sigset) == -1,
sigset);
HF(getentropy); /* an addr in this library */
HF(printf); /* an addr in libc */
p = (char *)&p;
HD(p); /* an addr on stack */
p = (char *)&errno;
HD(p); /* the addr of errno */
if (i == 0) {
struct sockaddr_storage ss;
struct statvfs stvfs;
struct termios tios;
struct statfs stfs;
socklen_t ssl;
off_t off;
/*
* Prime-sized mappings encourage fragmentation;
* thus exposing some address entropy.
*/
struct mm {
size_t npg;
void *p;
} mm[] = {
{ 17, MAP_FAILED }, { 3, MAP_FAILED },
{ 11, MAP_FAILED }, { 2, MAP_FAILED },
{ 5, MAP_FAILED }, { 3, MAP_FAILED },
{ 7, MAP_FAILED }, { 1, MAP_FAILED },
{ 57, MAP_FAILED }, { 3, MAP_FAILED },
{ 131, MAP_FAILED }, { 1, MAP_FAILED },
};
for (m = 0; m < sizeof mm/sizeof(mm[0]); m++) {
HX(mm[m].p = mmap(NULL,
mm[m].npg * pgs,
PROT_READ|PROT_WRITE,
MAP_PRIVATE|MAP_ANON, -1,
(off_t)0), mm[m].p);
if (mm[m].p != MAP_FAILED) {
size_t mo;
/* Touch some memory... */
p = mm[m].p;
mo = cnt %
(mm[m].npg * pgs - 1);
p[mo] = 1;
cnt += (int)((long)(mm[m].p)
/ pgs);
}
/* Check cnts and times... */
for (ii = 0; ii < sizeof(cl)/sizeof(cl[0]);
ii++) {
HX((e = clock_gettime(cl[ii],
&ts)) == -1, ts);
if (e != -1)
cnt += (int)ts.tv_nsec;
}
HX((e = getrusage(RUSAGE_SELF,
&ru)) == -1, ru);
if (e != -1) {
cnt += (int)ru.ru_utime.tv_sec;
cnt += (int)ru.ru_utime.tv_usec;
}
}
for (m = 0; m < sizeof mm/sizeof(mm[0]); m++) {
if (mm[m].p != MAP_FAILED)
munmap(mm[m].p, mm[m].npg * pgs);
mm[m].p = MAP_FAILED;
}
HX(stat(".", &st) == -1, st);
HX(statvfs(".", &stvfs) == -1, stvfs);
HX(statfs(".", &stfs) == -1, stfs);
HX(stat("/", &st) == -1, st);
HX(statvfs("/", &stvfs) == -1, stvfs);
HX(statfs("/", &stfs) == -1, stfs);
HX((e = fstat(0, &st)) == -1, st);
if (e == -1) {
if (S_ISREG(st.st_mode) ||
S_ISFIFO(st.st_mode) ||
S_ISSOCK(st.st_mode)) {
HX(fstatvfs(0, &stvfs) == -1,
stvfs);
HX(fstatfs(0, &stfs) == -1,
stfs);
HX((off = lseek(0, (off_t)0,
SEEK_CUR)) < 0, off);
}
if (S_ISCHR(st.st_mode)) {
HX(tcgetattr(0, &tios) == -1,
tios);
} else if (S_ISSOCK(st.st_mode)) {
memset(&ss, 0, sizeof ss);
ssl = sizeof(ss);
HX(getpeername(0,
(void *)&ss, &ssl) == -1,
ss);
}
}
HX((e = getrusage(RUSAGE_CHILDREN,
&ru)) == -1, ru);
if (e != -1) {
cnt += (int)ru.ru_utime.tv_sec;
cnt += (int)ru.ru_utime.tv_usec;
}
} else {
/* Subsequent hashes absorb previous result */
HD(results);
}
HX((e = gettimeofday(&tv, NULL)) == -1, tv);
if (e != -1) {
cnt += (int)tv.tv_sec;
cnt += (int)tv.tv_usec;
}
HD(cnt);
}
#ifdef HAVE_GETAUXVAL
#ifdef AT_RANDOM
/* Not as random as you think but we take what we are given */
p = (char *) getauxval(AT_RANDOM);
if (p)
HR(p, 16);
#endif
#ifdef AT_SYSINFO_EHDR
p = (char *) getauxval(AT_SYSINFO_EHDR);
if (p)
HR(p, pgs);
#endif
#ifdef AT_BASE
p = (char *) getauxval(AT_BASE);
if (p)
HD(p);
#endif
#endif
SHA512_Final(results, &ctx);
memcpy((char *)buf + i, results, min(sizeof(results), len - i));
i += min(sizeof(results), len - i);
}
explicit_bzero(&ctx, sizeof ctx);
explicit_bzero(results, sizeof results);
if (gotdata(buf, len) == 0) {
errno = save_errno;
return (0); /* satisfied */
}
errno = EIO;
return (-1);
}
int main() {
// Did getauxval during preinit get the same results as getauxval now?
CHECK(getauxval(AT_RANDOM) == g_AT_RANDOM);
CHECK(getauxval(AT_PAGESZ) == g_AT_PAGESZ);
return 0;
}
static void preinit_ctor() {
g_AT_RANDOM = getauxval(AT_RANDOM);
g_AT_PAGESZ = getauxval(AT_PAGESZ);
}
void
mono_hwcap_arch_init (void)
{
#if defined(HAVE_SYS_AUXV_H) && !defined(PLATFORM_ANDROID)
unsigned long hwcap;
unsigned long platform;
if ((hwcap = getauxval(AT_HWCAP))) {
/* HWCAP_ARM_THUMB */
if (hwcap & 0x00000004)
mono_hwcap_arm_has_thumb = TRUE;
/* HWCAP_ARM_VFP */
if (hwcap & 0x00000064)
mono_hwcap_arm_has_vfp = TRUE;
/* TODO: Find a way to detect Thumb 2. */
}
if ((platform = getauxval(AT_PLATFORM))) {
const char *str = (const char *) platform;
if (str [1] >= '5')
mono_hwcap_arm_is_v5 = TRUE;
if (str [1] >= '6')
mono_hwcap_arm_is_v6 = TRUE;
if (str [1] >= '7')
mono_hwcap_arm_is_v7 = TRUE;
/* TODO: Find a way to detect v7s. */
}
#elif defined(__APPLE__)
cpu_subtype_t sub_type;
size_t length = sizeof (sub_type);
sysctlbyname ("hw.cpusubtype", &sub_type, &length, NULL, 0);
if (sub_type == CPU_SUBTYPE_ARM_V5TEJ || sub_type == CPU_SUBTYPE_ARM_XSCALE) {
mono_hwcap_arm_is_v5 = TRUE;
} else if (sub_type == CPU_SUBTYPE_ARM_V6) {
mono_hwcap_arm_is_v5 = TRUE;
mono_hwcap_arm_is_v6 = TRUE;
} else if (sub_type == CPU_SUBTYPE_ARM_V7 || sub_type == CPU_SUBTYPE_ARM_V7F || sub_type == CPU_SUBTYPE_ARM_V7K) {
mono_hwcap_arm_is_v5 = TRUE;
mono_hwcap_arm_is_v6 = TRUE;
mono_hwcap_arm_is_v7 = TRUE;
}
/* TODO: Find a way to detect features like Thumb and VFP. */
#else
/* We can't use the auxiliary vector on Android due to
* permissions, so fall back to /proc/cpuinfo. We also
* hit this path if the target doesn't have sys/auxv.h.
*/
char buf [512];
char *line;
FILE *file = fopen ("/proc/cpuinfo", "r");
if (file) {
while ((line = fgets (buf, 512, file))) {
if (!strncmp (line, "Processor", 9)) {
char *ver = strstr (line, "(v");
if (ver) {
if (ver [2] >= '5')
mono_hwcap_arm_is_v5 = TRUE;
if (ver [2] >= '6')
mono_hwcap_arm_is_v6 = TRUE;
if (ver [2] >= '7')
mono_hwcap_arm_is_v7 = TRUE;
/* TODO: Find a way to detect v7s. */
}
continue;
}
if (!strncmp (line, "Features", 8)) {
if (strstr (line, "thumb"))
mono_hwcap_arm_has_thumb = TRUE;
/* TODO: Find a way to detect Thumb 2. */
if (strstr (line, "vfp"))
mono_hwcap_arm_has_vfp = TRUE;
continue;
}
}
fclose (file);
}
#endif
}
TEST(getauxval, unexpected_values) {
ASSERT_EQ((unsigned long int) 0, getauxval(0xdeadbeef));
}
void
mono_hwcap_arch_init (void)
{
#if defined(HAVE_SYS_AUXV_H) && !defined(PLATFORM_ANDROID)
unsigned long hwcap;
unsigned long platform;
if ((hwcap = getauxval(AT_HWCAP))) {
/* HWCAP_ARM_THUMB */
if (hwcap & 0x00000004)
mono_hwcap_arm_has_thumb = TRUE;
/* HWCAP_ARM_VFP */
if (hwcap & 0x00000040)
mono_hwcap_arm_has_vfp = TRUE;
/* HWCAP_ARM_VFPv3 */
if (hwcap & 0x00002000)
mono_hwcap_arm_has_vfp3 = TRUE;
/* HWCAP_ARM_VFPv3D16 */
if (hwcap & 0x00004000)
mono_hwcap_arm_has_vfp3_d16 = TRUE;
/* TODO: Find a way to detect Thumb 2. */
}
if ((platform = getauxval(AT_PLATFORM))) {
const char *str = (const char *) platform;
if (str [1] >= '5')
mono_hwcap_arm_is_v5 = TRUE;
if (str [1] >= '6')
mono_hwcap_arm_is_v6 = TRUE;
if (str [1] >= '7')
mono_hwcap_arm_is_v7 = TRUE;
/* TODO: Find a way to detect v7s. */
}
#elif defined(__APPLE__)
cpu_subtype_t sub_type;
size_t length = sizeof (sub_type);
sysctlbyname ("hw.cpusubtype", &sub_type, &length, NULL, 0);
if (sub_type == CPU_SUBTYPE_ARM_V5TEJ || sub_type == CPU_SUBTYPE_ARM_XSCALE) {
mono_hwcap_arm_is_v5 = TRUE;
} else if (sub_type == CPU_SUBTYPE_ARM_V6) {
mono_hwcap_arm_is_v5 = TRUE;
mono_hwcap_arm_is_v6 = TRUE;
} else if (sub_type == CPU_SUBTYPE_ARM_V7 || sub_type == CPU_SUBTYPE_ARM_V7F || sub_type == CPU_SUBTYPE_ARM_V7K) {
mono_hwcap_arm_is_v5 = TRUE;
mono_hwcap_arm_is_v6 = TRUE;
mono_hwcap_arm_is_v7 = TRUE;
}
/* TODO: Find a way to detect features like Thumb and VFP. */
#else
/* We can't use the auxiliary vector on Android due to
* permissions, so fall back to /proc/cpuinfo. We also
* hit this path if the target doesn't have sys/auxv.h.
*/
#if defined (HAVE_SYS_UTSNAME_H)
struct utsname name;
/* Only fails if `name` is invalid (it isn't). */
g_assert (!uname (&name));
if (!strncmp (name.machine, "aarch64", 7) || !strncmp (name.machine, "armv8", 5)) {
/*
* We're a 32-bit program running on an ARMv8 system.
* Whether the system is actually 32-bit or 64-bit
* doesn't matter to us. The important thing is that
* all 3 of ARMv8's execution states (A64, A32, T32)
* are guaranteed to have all of the features that
* we want to detect and use.
*
* We do this ARMv8 detection via uname () because
* in the early days of ARMv8 on Linux, the
* /proc/cpuinfo format was a disaster and there
* were multiple (merged into mainline) attempts at
* cleaning it up (read: breaking applications that
* tried to rely on it). So now multiple ARMv8
* systems in the wild have different /proc/cpuinfo
* output, some of which are downright useless.
*
* So, when it comes to detecting ARMv8 in a 32-bit
* program, it's better to just avoid /proc/cpuinfo
* entirely. Maybe in a decade or two, we won't
* have to worry about this mess that the Linux ARM
* maintainers created. One can hope.
*/
mono_hwcap_arm_is_v5 = TRUE;
mono_hwcap_arm_is_v6 = TRUE;
mono_hwcap_arm_is_v7 = TRUE;
mono_hwcap_arm_has_vfp = TRUE;
mono_hwcap_arm_has_vfp3 = TRUE;
mono_hwcap_arm_has_vfp3_d16 = TRUE;
mono_hwcap_arm_has_thumb = TRUE;
mono_hwcap_arm_has_thumb2 = TRUE;
}
#endif
char buf [512];
char *line;
FILE *file = fopen ("/proc/cpuinfo", "r");
if (file) {
while ((line = fgets (buf, 512, file))) {
if (!strncmp (line, "Processor", 9)) {
char *ver = strstr (line, "(v");
if (ver) {
if (ver [2] >= '5')
mono_hwcap_arm_is_v5 = TRUE;
if (ver [2] >= '6')
mono_hwcap_arm_is_v6 = TRUE;
if (ver [2] >= '7')
mono_hwcap_arm_is_v7 = TRUE;
/* TODO: Find a way to detect v7s. */
}
continue;
}
if (!strncmp (line, "Features", 8)) {
if (strstr (line, "thumb"))
mono_hwcap_arm_has_thumb = TRUE;
/* TODO: Find a way to detect Thumb 2. */
if (strstr (line, "vfp"))
mono_hwcap_arm_has_vfp = TRUE;
if (strstr (line, "vfpv3"))
mono_hwcap_arm_has_vfp3 = TRUE;
if (strstr (line, "vfpv3-d16"))
mono_hwcap_arm_has_vfp3_d16 = TRUE;
continue;
}
}
fclose (file);
}
#endif
}