Stack Logical Commands: Again, what the state of the stack and memory after the following VM code is executed. Where will the stack pointer (SP) end up if it originally begins at address 256? Please illustrate the stack after every VM command has been executed. VM code push x push 7 lt push y push 8 eq or memory ... X 15 y 8 stack sp stack sp→ 256 257 258 259

Stack Logical Commands: Again, what the state of the stack and memory after the following VM code is executed. Where will the stack pointer (SP) end up if it originally begins at address 256? Please illustrate the stack after every VM command has been executed. VM code push x push 7 lt push y push 8 eq or memory ... X 15 y 8 stack sp stack sp→ 256 257 258 259

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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Similar questions

Q-6: A main program consists of two procedures begins at memory address 7000H. Procedure-1 begins at begins at 6000H and Procedure-2 begins at 8000H respectively. Procedure-1 is called within Procedure-2 at memory address 8050H. In the main program Procedure-1 is called at 7040H and Procedure-2 is called twice: first at 7060H and then at 70AOH. Please note that Stack is used to save return addresses at the instants of procedure calls. Show the state of Stack while the program runs.
Assume that the stack grows towards zero, the stack pointer is R6 and contains x4000. What are the contents of R6 after the following operations: push 5 push 4 push 3 push 2 pop pop x4002 x3FFF x3FFE 4001 3FFE
Computing And Software Systems
Write a sequence of statements that display a subroutine’s return address. Be sure that whatever modifications you make to the stack do not prevent the subroutine from returning to itscaller
StackGuard is a tool for detecting buffer overflows. It modifies the compiler to place a known(pseudo)random number (a canary) on the stack just before the return address when a function is called. Additional code is added so that, just before the function returns, it pops the canary and compares it to the value thatwas placed upon the stack. If the two differ, StackGuard asserts a buffer overflow has occurred, and invokes anerror handler to terminate the program. How effective is this approach at stopping stack-based buffer overflows?Under what conditions might it fail?
3. In the StackGuard approach to solving the buffer overflow problem, the compiler inserts a canary value on the memory location before the retum address in the stack. The canary value is randomly generated. When there is a return from the function call, the compiler checks if the canary value has been overwritten or not. Do you think this approach would work? Why or why not?
How many "stack frames" the program uses when the stack is at its deepest (when using the most stack memory)The global scope reserves a stackframe. Each outstanding function call reserves an additional stackframe. x = 10 y = 200 def pig(x): return x + 5 def chicken(x): temp = pig(x) return cow(temp) - temp def cow(y): return pig(y) + y farm = chicken(pig(x))
If a resource in a stack cannot be created, what happens?
Develop an application using java language that store characters A, B and C in a stack array and then displays both the size and the last-in element of the stack. The application should then remove the last element of the stack and then display again both the size and the last-in element of the stack. Appropriate stack methods should be used to add, delete and display characters.
It is possible to show the return address of a function by executing a set of instructions in sequence. Be mindful that any changes you make to the stack must not hinder the procedure's ability to restore control to the entity that called it.
So what happens if a stack resource can't be created?
In C programming ONLY! PLEASE FOLLOW THE INSTRUCTIONS