diff options
Diffstat (limited to 'tf-psa-crypto/drivers/builtin/src/threading.c')
| -rw-r--r-- | tf-psa-crypto/drivers/builtin/src/threading.c | 195 |
1 files changed, 195 insertions, 0 deletions
diff --git a/tf-psa-crypto/drivers/builtin/src/threading.c b/tf-psa-crypto/drivers/builtin/src/threading.c new file mode 100644 index 0000000..85db243 --- /dev/null +++ b/tf-psa-crypto/drivers/builtin/src/threading.c @@ -0,0 +1,195 @@ +/* + * Threading abstraction layer + * + * Copyright The Mbed TLS Contributors + * SPDX-License-Identifier: Apache-2.0 OR GPL-2.0-or-later + */ + +/* + * Ensure gmtime_r is available even with -std=c99; must be defined before + * mbedtls_config.h, which pulls in glibc's features.h. Harmless on other platforms. + */ +#if !defined(_POSIX_C_SOURCE) +#define _POSIX_C_SOURCE 200112L +#endif + +#include "common.h" + +#if defined(MBEDTLS_THREADING_C) + +#include "mbedtls/threading.h" + +#if defined(MBEDTLS_HAVE_TIME_DATE) && !defined(MBEDTLS_PLATFORM_GMTIME_R_ALT) + +#if !defined(_WIN32) && (defined(unix) || \ + defined(__unix) || defined(__unix__) || (defined(__APPLE__) && \ + defined(__MACH__))) +#include <unistd.h> +#endif /* !_WIN32 && (unix || __unix || __unix__ || + * (__APPLE__ && __MACH__)) */ + +#if !((defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L) || \ + (defined(_POSIX_THREAD_SAFE_FUNCTIONS) && \ + _POSIX_THREAD_SAFE_FUNCTIONS >= 200112L)) +/* + * This is a convenience shorthand macro to avoid checking the long + * preprocessor conditions above. Ideally, we could expose this macro in + * platform_util.h and simply use it in platform_util.c, threading.c and + * threading.h. However, this macro is not part of the Mbed TLS public API, so + * we keep it private by only defining it in this file + */ + +#if !(defined(_WIN32) && !defined(EFIX64) && !defined(EFI32)) +#define THREADING_USE_GMTIME +#endif /* ! ( defined(_WIN32) && !defined(EFIX64) && !defined(EFI32) ) */ + +#endif /* !( ( defined(_POSIX_VERSION) && _POSIX_VERSION >= 200809L ) || \ + ( defined(_POSIX_THREAD_SAFE_FUNCTIONS ) && \ + _POSIX_THREAD_SAFE_FUNCTIONS >= 200112L ) ) */ + +#endif /* MBEDTLS_HAVE_TIME_DATE && !MBEDTLS_PLATFORM_GMTIME_R_ALT */ + +#if defined(MBEDTLS_THREADING_PTHREAD) +static void threading_mutex_init_pthread(mbedtls_threading_mutex_t *mutex) +{ + if (mutex == NULL) { + return; + } + + /* One problem here is that calling lock on a pthread mutex without first + * having initialised it is undefined behaviour. Obviously we cannot check + * this here in a thread safe manner without a significant performance + * hit, so state transitions are checked in tests only via the state + * variable. Please make sure any new mutex that gets added is exercised in + * tests; see tests/src/threading_helpers.c for more details. */ + (void) pthread_mutex_init(&mutex->mutex, NULL); +} + +static void threading_mutex_free_pthread(mbedtls_threading_mutex_t *mutex) +{ + if (mutex == NULL) { + return; + } + + (void) pthread_mutex_destroy(&mutex->mutex); +} + +static int threading_mutex_lock_pthread(mbedtls_threading_mutex_t *mutex) +{ + if (mutex == NULL) { + return MBEDTLS_ERR_THREADING_BAD_INPUT_DATA; + } + + if (pthread_mutex_lock(&mutex->mutex) != 0) { + return MBEDTLS_ERR_THREADING_MUTEX_ERROR; + } + + return 0; +} + +static int threading_mutex_unlock_pthread(mbedtls_threading_mutex_t *mutex) +{ + if (mutex == NULL) { + return MBEDTLS_ERR_THREADING_BAD_INPUT_DATA; + } + + if (pthread_mutex_unlock(&mutex->mutex) != 0) { + return MBEDTLS_ERR_THREADING_MUTEX_ERROR; + } + + return 0; +} + +void (*mbedtls_mutex_init)(mbedtls_threading_mutex_t *) = threading_mutex_init_pthread; +void (*mbedtls_mutex_free)(mbedtls_threading_mutex_t *) = threading_mutex_free_pthread; +int (*mbedtls_mutex_lock)(mbedtls_threading_mutex_t *) = threading_mutex_lock_pthread; +int (*mbedtls_mutex_unlock)(mbedtls_threading_mutex_t *) = threading_mutex_unlock_pthread; + +/* + * With pthreads we can statically initialize mutexes + */ +#define MUTEX_INIT = { PTHREAD_MUTEX_INITIALIZER, 1 } + +#endif /* MBEDTLS_THREADING_PTHREAD */ + +#if defined(MBEDTLS_THREADING_ALT) +static int threading_mutex_fail(mbedtls_threading_mutex_t *mutex) +{ + ((void) mutex); + return MBEDTLS_ERR_THREADING_BAD_INPUT_DATA; +} +static void threading_mutex_dummy(mbedtls_threading_mutex_t *mutex) +{ + ((void) mutex); + return; +} + +void (*mbedtls_mutex_init)(mbedtls_threading_mutex_t *) = threading_mutex_dummy; +void (*mbedtls_mutex_free)(mbedtls_threading_mutex_t *) = threading_mutex_dummy; +int (*mbedtls_mutex_lock)(mbedtls_threading_mutex_t *) = threading_mutex_fail; +int (*mbedtls_mutex_unlock)(mbedtls_threading_mutex_t *) = threading_mutex_fail; + +/* + * Set functions pointers and initialize global mutexes + */ +void mbedtls_threading_set_alt(void (*mutex_init)(mbedtls_threading_mutex_t *), + void (*mutex_free)(mbedtls_threading_mutex_t *), + int (*mutex_lock)(mbedtls_threading_mutex_t *), + int (*mutex_unlock)(mbedtls_threading_mutex_t *)) +{ + mbedtls_mutex_init = mutex_init; + mbedtls_mutex_free = mutex_free; + mbedtls_mutex_lock = mutex_lock; + mbedtls_mutex_unlock = mutex_unlock; + +#if defined(MBEDTLS_FS_IO) + mbedtls_mutex_init(&mbedtls_threading_readdir_mutex); +#endif +#if defined(THREADING_USE_GMTIME) + mbedtls_mutex_init(&mbedtls_threading_gmtime_mutex); +#endif +#if defined(MBEDTLS_PSA_CRYPTO_C) + mbedtls_mutex_init(&mbedtls_threading_key_slot_mutex); + mbedtls_mutex_init(&mbedtls_threading_psa_globaldata_mutex); + mbedtls_mutex_init(&mbedtls_threading_psa_rngdata_mutex); +#endif +} + +/* + * Free global mutexes + */ +void mbedtls_threading_free_alt(void) +{ +#if defined(MBEDTLS_FS_IO) + mbedtls_mutex_free(&mbedtls_threading_readdir_mutex); +#endif +#if defined(THREADING_USE_GMTIME) + mbedtls_mutex_free(&mbedtls_threading_gmtime_mutex); +#endif +#if defined(MBEDTLS_PSA_CRYPTO_C) + mbedtls_mutex_free(&mbedtls_threading_key_slot_mutex); + mbedtls_mutex_free(&mbedtls_threading_psa_globaldata_mutex); + mbedtls_mutex_free(&mbedtls_threading_psa_rngdata_mutex); +#endif +} +#endif /* MBEDTLS_THREADING_ALT */ + +/* + * Define global mutexes + */ +#ifndef MUTEX_INIT +#define MUTEX_INIT +#endif +#if defined(MBEDTLS_FS_IO) +mbedtls_threading_mutex_t mbedtls_threading_readdir_mutex MUTEX_INIT; +#endif +#if defined(THREADING_USE_GMTIME) +mbedtls_threading_mutex_t mbedtls_threading_gmtime_mutex MUTEX_INIT; +#endif +#if defined(MBEDTLS_PSA_CRYPTO_C) +mbedtls_threading_mutex_t mbedtls_threading_key_slot_mutex MUTEX_INIT; +mbedtls_threading_mutex_t mbedtls_threading_psa_globaldata_mutex MUTEX_INIT; +mbedtls_threading_mutex_t mbedtls_threading_psa_rngdata_mutex MUTEX_INIT; +#endif + +#endif /* MBEDTLS_THREADING_C */ |