Question: SYSTEM CALLS IN C (LINUX KERNEL) * write a system call to report the current status of a specific address. The system call takes a

SYSTEM CALLS IN C (LINUX KERNEL)

* write a system call to report the current status of a specific address. The system call takes a virtual address of a process and outputs the following information:

1. If the data in this address is in memory or on disk.

2. If the page which this address belongs to has been referenced or not.

3. If the page which this address belongs to is dirty or not.

Hints: It is helpful to read subsection of Chapter 2: Page table handling of the reference book Understanding the Linux Kernel (ULK) (3rd edition). The page descriptor struct page defined in linux/mm_types.h contains information (i.e., the flags field) about the page. You need to figure out how to obtain a reference to the page descriptor given a virtual address and read to information from the page descriptor. To test if an address is in memory, you need to test the present flag of the addresss corresponding page table entry. Note that Linux uses multi-level page tables, you might need multiple steps to reach the page table entry of a given virtual addres

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

Add a Static System Call to the Linux Kernel Write a new static system call to incorporate to your custom Linux Kernel. The system call you write should take one argument and return the process state...

6 8 . The above code can generate an execution error that will be controlled by the OS: int main ( ) { int i [ 2 ] = { 6 , 2 } ; int r - i [ 0 ] / [ 1 ] ; i [ 1 0 0 ] = r; printf ( " [ 1 ] / [ 2 ] =...

can someone please help me witht his and also provide screenshots so I can see, I have no idea what to start or what its asking Add a Static System Call to the Linux Kernel Write a new static system...

Linux system calls using C programming: write a system call to report the current status of a specific address. The system call takes a virtual address of a process and outputs the following...

The purpose of this project is to redirect Linux input within a C program after forking a child process and using the execlp system call. The Linux/UNIX shell command line environment provides a...

write Program in C to Add System call. Header File: #include struct pinfo { pid_t pid; /* process id */ long state; /* current state of process */ long nice; /* process nice value */ pid_t...

Wallys Bar operates seven days a week. The daily requirements (in workers) are estimated as follows: M T W Th F S Su Requirements 2 3 5 4 5 4 4 Find the minimum number of workers needed. Prepare a...

In Kastle Company, it costs $30 per unit ($20 variable and $10 fixed) to make a product that normally sells for $45. A foreign wholesaler offers to buy 4,000 units at $23 each. Kastle will incur...

2 How do writers use language to create a conversational tone?

CT Corp Comprehensive Question Canadian Tire Corporation, Limited (Canadian Tire) is a family of companies that includes a retail segment and a financial services division, among others. The retail...

Visit the Postal Service website (www.usps.com) or your local post office to learn the difference between certified mail and registered mail.Then, address an envelope (or paper cut to the appropriate...

What benefits can be gained from an effective sales appeal in an adjustment message? (Objective 4)

Teamwork. Form teams of three students and design a brochure that could be used to welcome new students to your college.Be prepared to promote your brochure in a class contest. (Objective 5)