Question

3.what is the "state" of a running program (or process)? Be
specific. Why must the state of the current program be saved prior to processing
an exception or interrupt? Explain. Which parts of a program's state are saved
through the processor's exception-processing mechanism, and which parts are
saved by the exception handler or interrupt-service routine?

assembly. 68000

Answer 1

Hopefully this will clear all your doubts.If you still face any query let me know in the comment section.Thank You.

Below is a snapshot of the answer.

as what is the state of a numing proqra And the state of a running process in Running s why must the state of the werent preoqram be saved price to pedoccesoting an exception ? Ang whenever an interrupt arweives, the CPU mest do a state - save of the werently running process, then switch into kernel moden to handle the interweupt and then do a state- restrone of the enterrupted process, saving involves sowne all of the registers as well as process contred blocks. Q, which parts of a program's state are I saved through processor exception processing mechanism Ans when an exception occues ha processor PC is sowed ma special processore registere called Exception progecam counter and the PC in loaded with a value ! At end of intewerpt handlere code we jump to address in a pc as which parts are haved by acception the interrupt service routine Am Exception handler save the contents of most registeres in kernel Mode stack. Any exception rallied in Kernel Mode is due to a kerthel bug. In this case, the exception handler known's the Kernel is misbehaving