ARM Architecture - Exception and Interrupt Model
An ARM exception handler is missing the instruction to save the link register. What problem will this cause?
An ARM exception handler is missing the instruction to save the link register. What problem will this cause?
medium📝 Analysis Q6 of 15
Step-by-Step Solution
Solution:
Step 1: Understand the link register's role
The link register holds the return address to continue normal execution after the handler.Step 2: Effect of not saving the link register
If it is not saved, the processor loses the return address and cannot resume correctly.Final Answer:
The processor will not return correctly after handling the exception -> Option BQuick Check:
Missing link register save = incorrect return [OK]
Quick Trick: Save link register to return properly [OK]
Common Mistakes:
- Thinking exception is ignored
- Assuming processor resets
- Believing handler runs twice
Master "Exception and Interrupt Model" in ARM Architecture
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore ARM Architecture Quizzes