22. What happens to the program counter and link register when a "bl " is performed? 23. What happens to the program counter and link register when a "bx LR" is performed? 24. If the stack pointer starts at Ox20001000 and three things are pushed, what will the new stack pointer value be?

22. What happens to the program counter and link register when a "bl " is performed? 23. What happens to the program counter and link register when a "bx LR" is performed? 24. If the stack pointer starts at Ox20001000 and three things are pushed, what will the new stack pointer value be?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Concept explainers

Computer Fundamentals

The computer is termed computation. For calculating or computing something the device that has been used is known as the computer. Or we can say that for performing a fast arithmetic operation the device that has been used is a computer. Storing, processing, and retrieving are the main features of a computer. 

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Using ARM assembly:

22.
What happens to the program counter and link register when a "bl <Label>" is
performed?
23. What happens to the program counter and link register when a "bx LR" is performed?
24. If the stack pointer starts at Ox20001000 and three things are pushed, what will the
new stack pointer value be?

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Step 1: When a "bl <label>" (branch and link) instruction is executed:

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Step 2: when a "bx LR" is performed:

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