Alias: It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Question

The next problem concerns the following C code: /copy input string x to buf */ void foo (char *x) { char buf [8]; strcpy((char *) buf, x); } void callfoo() { } foo("ZYXWVUTSRQPONMLKJIHGFEDCBA"); Here is the corresponding machine code on a Linux/x86 machine: 0000000000400530 : 400530: 48 83 ec 18 sub $0x18,%rsp 400534: 48 89 fe mov %rdi, %rsi 400537: 48 89 e7 mov %rsp,%rdi 40053a: e8 d1 fe ff ff 40053f: 48 83 c4 18 add callq 400410 $0x18,%rsp 400543: c3 retq 0000000000400544 : 400544: 48 83 ec 08 sub $0x8,%rsp 400548: bf 00 06 40 00 mov $0x400600,%edi 40054d: e8 de ff ff ff callq 400530 400552: 48 83 c4 08 add $0x8,%rsp 400556: c3 This problem tests your understanding of the program stack. Here are some notes to help you work the problem: • strcpy(char *dst, char *src) copies the string at address src (including the terminating '\0' character) to address dst. It does not check the size of the destination buffer. You will need to know the hex values of the following characters:

Answer 1

Expert Solution & Answer

Chapter 5, Problem 5RQ

Explanation of Solution

Alias:

It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Explanation of Solution

Specifying alias in SQL:

In SQL, the format...

Explanation of Solution

Using alias name:

Example:

SELECT emp_id, name, age, salary FROM EMPLOYEE E, SALARY S WHERE E.emp_id = S.emp_id;

In the above example the alia...

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Students have asked these similar questions

The next problem concerns the following C code: /copy input string x to buf */ void foo (char *x) { char buf [8]; strcpy((char *) buf, x); } void callfoo() { } foo("ZYXWVUTSRQPONMLKJIHGFEDCBA"); Here is the corresponding machine code on a Linux/x86 machine: 0000000000400530 : 400530: 48 83 ec 18 sub $0x18,%rsp 400534: 48 89 fe mov %rdi, %rsi 400537: 48 89 e7 mov %rsp,%rdi 40053a: e8 d1 fe ff ff 40053f: 48 83 c4 18 add callq 400410 $0x18,%rsp 400543: c3 retq 0000000000400544 : 400544: 48 83 ec 08 sub $0x8,%rsp 400548: bf 00 06 40 00 mov $0x400600,%edi 40054d: e8 de ff ff ff callq 400530 400552: 48 83 c4 08 add $0x8,%rsp 400556: c3 This problem tests your understanding of the program stack. Here are some notes to help you work the problem: • strcpy(char *dst, char *src) copies the string at address src (including the terminating '\0' character) to address dst. It does not check the size of the destination buffer. You will need to know the hex values of the following characters:

A ROP (Return-Oriented Programming) attack can be used to execute arbitrary instructions by chaining together small pieces of code called "gadgets." Your goal is to create a stack layout for a ROP attack that calls a function located at '0x4018bd3'. Below is the assembly code for the function 'getbuf', which allocates 8 bytes of stack space for a 'char' array. This array is then passed to the 'gets' function. Additionally, you are provided with five useful gadgets and their addresses. Use these gadgets to construct the stack layout. Assembly for getbuf 1 getbuf: 2 sub $8, %rsp 3 mov %rsp, %rdi 4 call gets 56 add $8, %rsp ret #Allocate 8 bytes for buffer #Load buffer address into %rdi #Call gets with buffer #Restore the stack pointer #Return to caller. Stack Layout (fill in Gadgets each 8-byte section) Address Gadget Address Value (8 bytes) 0x4006a7 pop %rdi; ret 0x7fffffffdfc0 Ox4006a9 pop %rsi; ret 0x7fffffffdfb8 0x4006ab pop %rax; ret 0x7fffffffdfb0 0x7fffffffdfa8 Ox4006ad mov %rax,…

In each of the following C code snippets, there are issues that can prevent the compilerfrom applying certain optimizations. For each snippet:• Circle the line number that contains compiler optimization blocker.• Select the best modification to improve optimization.1. Which line prevents compiler optimization? Circle one: 2 3 4 5 6Suggested solution:• Remove printf or move it outside the loop.• Remove the loop.• Replace arr[i] with a constant value.1 int sum( int ∗ ar r , int n) {2 int s = 0 ;3 for ( int i = 0 ; i < n ; i++) {4 s += a r r [ i ] ;5 p r i n t f ( ”%d\n” , s ) ;6 }7 return s ;8 }2. Which line prevents compiler optimization? Circle one: 2 3 4 5 6Suggested solution:• Move or eliminate do extra work() if it’s not necessary inside the loop.• Remove the loop (but what about scaling?).• Replace arr[i] *= factor; with arr[i] = 0; (why would that help?).1 void s c a l e ( int ∗ ar r , int n , int f a c t o r ) {2 for ( int i = 0 ; i < n ; i++) {3 a r r [ i ] ∗= f a c t o r…

Answer 2

Expert Solution & Answer

Chapter 5, Problem 5RQ

Explanation of Solution

Alias:

It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Explanation of Solution

Specifying alias in SQL:

In SQL, the format...

Explanation of Solution

Using alias name:

Example:

SELECT emp_id, name, age, salary FROM EMPLOYEE E, SALARY S WHERE E.emp_id = S.emp_id;

In the above example the alia...

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Answer 3

Expert Solution & Answer

Chapter 5, Problem 5RQ

Explanation of Solution

Alias:

It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Explanation of Solution

Specifying alias in SQL:

In SQL, the format...

Explanation of Solution

Using alias name:

Example:

SELECT emp_id, name, age, salary FROM EMPLOYEE E, SALARY S WHERE E.emp_id = S.emp_id;

In the above example the alia...

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Answer 4

Expert Solution & Answer

Chapter 5, Problem 5RQ

Explanation of Solution

Alias:

It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Explanation of Solution

Specifying alias in SQL:

In SQL, the format...

Explanation of Solution

Using alias name:

Example:

SELECT emp_id, name, age, salary FROM EMPLOYEE E, SALARY S WHERE E.emp_id = S.emp_id;

In the above example the alia...

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Answer 5

Expert Solution & Answer

Answer 6

Expert Solution & Answer

Answer 7

Chapter 5, Problem 5RQ

Explanation of Solution

Alias:

It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Explanation of Solution

Specifying alias in SQL:

In SQL, the format...

Explanation of Solution

Using alias name:

Example:

SELECT emp_id, name, age, salary FROM EMPLOYEE E, SALARY S WHERE E.emp_id = S.emp_id;

In the above example the alia...

Answer 8

Chapter 5, Problem 5RQ

Explanation of Solution

Alias:

It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Answer 9

Chapter 5, Problem 5RQ

Explanation of Solution

Alias:

It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Answer 10

Explanation of Solution

Specifying alias in SQL:

In SQL, the format...

Answer 11

Explanation of Solution

Specifying alias in SQL:

In SQL, the format...

Answer 12

Explanation of Solution

Using alias name:

Example:

SELECT emp_id, name, age, salary FROM EMPLOYEE E, SALARY S WHERE E.emp_id = S.emp_id;

In the above example the alia...

Answer 13

Explanation of Solution

Using alias name:

Example:

SELECT emp_id, name, age, salary FROM EMPLOYEE E, SALARY S WHERE E.emp_id = S.emp_id;

In the above example the alia...

Answer 14

Expert Solution & Answer

Answer 15

Expert Solution & Answer

Answer 16

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Answer 17

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Answer 18

Trending nowThis is a popular solution!

See solution

Check out sample textbook solution

Answer 19

Trending nowThis is a popular solution!

Answer 20

Trending nowThis is a popular solution!

Answer 21

Trending nowThis is a popular solution!

Answer 22

Trending now

Answer 23

This is a popular solution!

Answer 24

See solution

Check out sample textbook solution

Answer 25

Ch. 5 - Prob. 1RQ Ch. 5 - Prob. 2RQ Ch. 5 - Prob. 3RQ Ch. 5 - Prob. 4RQ Ch. 5 - Prob. 5RQ Ch. 5 - Prob. 6RQ Ch. 5 - Prob. 7RQ Ch. 5 - What does it mean for two tables to be union...Ch. 5 - Prob. 9RQ Ch. 5 - Prob. 10RQ

Alias: It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Solution Summary: The author explains that an alias name is a short form of the table name. It can be given as "C" or "CUS" depending on the user's convenience.

Concept explainers

Explanation of Solution

Alias:

It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Explanation of Solution

Specifying alias in SQL:

In SQL, the format...

Explanation of Solution

Using alias name:

Example:

SELECT emp_id, name, age, salary FROM EMPLOYEE E, SALARY S WHERE E.emp_id = S.emp_id;

In the above example the alia...

Chapter 5 Solutions

Alias: It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Solution Summary: The author explains that an alias name is a short form of the table name. It can be given as "C" or "CUS" depending on the user's convenience.

Concept explainers

Explanation of Solution

Alias: It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Explanation of Solution

Specifying alias in SQL: In SQL, the format...

Explanation of Solution

Using alias name: Example: SELECT emp_id, name, age, salary FROM EMPLOYEE E, SALARY S WHERE E.emp_id = S.emp_id; In the above example the alia...

Chapter 5 Solutions

Alias:

It is nothing but another name given for an existing table name. During the usage of “FROM” clause, the user can give an alias name for the table names so that, the user need not to mention the table name each time rather, he/ she can use the alias name...

Specifying alias in SQL:

In SQL, the format...

Using alias name:

Example:

SELECT emp_id, name, age, salary FROM EMPLOYEE E, SALARY S WHERE E.emp_id = S.emp_id;

In the above example the alia...