mbed OS can't sleep when uVisor is enabled #420
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ARM Internal Ref: IOTSEC-326 |
Patater
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Sep 14, 2017
When uVisor is enabled, don't attempt to sleep. Attempting to sleep will fail, as per <ARMmbed/uvisor#420>.
adbridge
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Sep 19, 2017
When uVisor is enabled, don't attempt to sleep. Attempting to sleep will fail, as per <ARMmbed/uvisor#420>.
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The RTOS idle thread runs unprivileged. It'd be nice if it, through a register level gateway or vSleep API, could put the system to sleep.
Currently, the RTOS idle thread calls mbed OS sleep, which then calls
hal_sleep, which has hundreds of implementations that do any number of things that unprivileged code can't do (leading to halts). For example, writing to theSCB->SCRregister is a nono for unprivileged code (without the register level gateway), yet many implementations do this to control how deeply they want to sleep at various points throughout the program's execution.The text was updated successfully, but these errors were encountered: