mirror of https://github.com/ARMmbed/mbed-os.git
cfd8823d30
1. For SHA AC, use atomic flag to manage its ownership.
(1) Nuvoton SHA AC doesn't support SHA context save & restore, so S/W
SHA fallback has been supported before. To make non-blocking 'acquire'
semantics clearer, introduce 'try_acquire' to substitute for 'acquire'.
(2) No biting CPU due to mechanism above.
(3) No deadlock due to mechanism above.
2. For AES/DES/ECC AC, change to mutex to manage their ownership.
(1) Change crypto-misc.c to crypto-misc.cpp to utilize C++ SingletonPtr
which guarantees thread-safe mutex construct-on-first-use.
(2) With change to crypto-misc.cpp, add 'extern "C"' modifier to CRYPTO_IRQHandler()
to avoid name mangling in C++.
(3) No priority inversion because mutex has osMutexPrioInherit attribute
bit set.
(4) No deadlock because these AC are all locked for a short sequence
of operations rather than the whole lifetime of mbedtls context.
(5) For double mbedtls_internal_ecp_init() issue, it has been fixed in upper
mbedtls layer. So no need to change ecc init/free flow.
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| .. | ||
| TARGET_ARM_FM | ||
| TARGET_ARM_SSG | ||
| TARGET_Analog_Devices | ||
| TARGET_Atmel | ||
| TARGET_Cypress/TARGET_PSOC6 | ||
| TARGET_Freescale | ||
| TARGET_Maxim | ||
| TARGET_NORDIC | ||
| TARGET_NUVOTON | ||
| TARGET_NXP | ||
| TARGET_ONSEMI | ||
| TARGET_RDA | ||
| TARGET_RENESAS | ||
| TARGET_Realtek | ||
| TARGET_STM | ||
| TARGET_Silicon_Labs | ||
| TARGET_TOSHIBA | ||
| TARGET_WICED | ||
| TARGET_WIZNET | ||
| TARGET_ublox | ||
| targets.json | ||