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Cortex : Saving registers during interrupts

VIKTOR BUCHRT

Hi

Want to know if there is a way to instruct the compiler to preserve more than the normal registers (R0-R3, R12, LR, PSR, and PC) during an interrupt.

Regards
Viktor Bucher

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  • 0 in reply to VIKTOR BUCHRT

    A compiler always (at least if the processor allows it) defines a number of scratch registers that may be used without second thought.

    But any function playing with other registers must take 100% responsibility for such use, and restore the expected state before returning or calling another function that hasn't been explicitly written to accept these exceptional register uses.

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  • 0 in reply to VIKTOR BUCHRT

    A compiler always (at least if the processor allows it) defines a number of scratch registers that may be used without second thought.

    But any function playing with other registers must take 100% responsibility for such use, and restore the expected state before returning or calling another function that hasn't been explicitly written to accept these exceptional register uses.

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