看来只能： <br />uint8 __get_primask(void) <br />{ <br /> asm( <br /> "mrs r0,primask
" <br /> "bx lr
" <br /> ); <br /> return 0; <br />} <br /><br />void __set_primask(uint8 flags) <br />{ <br /> asm( <br /> "msr primask,r0
" <br /> ); <br />} <br />
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