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In many Interrupt Service Routine (ISR), the last instruction of an ISR is BX LR. For a regular subroutine return, BX LR simply puts
In many Interrupt Service Routine (ISR), the last instruction of an ISR is BX LR. For a regular subroutine return, BX LR simply puts LR into PC. For an interrupt return BX LR does something different. How does BX LR know not to put LR into PC, and instead what does BX LR do?
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In an Interrupt Service Routine ISR the last instruction is typically BX LR which serves a different ...
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Computer organization and architecture designing for performance
Authors: william stallings
8th edition
136073735, 978-0136073734
