Operating Systems CMPSC 473 CPU virtualization January 21, 2021 – Lecture 2 Instructor: Bhuvan Urgaonkar Administrative stuff • Did you log in to the dept Linux machines? • Did you get an invitation for the course’s Piazza page? • Email etiquette (re)reminder: please always CC all TAs when emailing me • My office hours will […]
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Operating Systems CMPSC 473 CPU virtualization January 26, 2021 – Lecture 3 Instructor: Bhuvan Urgaonkar From the last lecture • Frame pointer vs. stack pointer • More address space minutiae • ASLR • disable this in project 1 • Even parts of code+data may be dynamically added/removed • DLLs • There is something still missing
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Ethical Hacking Ethical Hacking Introduction – part 2 Course Info OS Windows / Linux Process / Privilege Rings Permissions / Owners OSI Model TCP/IP Application HTTP/S Methods, Headers TLS Handshake Encoding Base64, UTF, URL, GZip Data format Header, Magic Number XML, JSON DOCX Metadata EXIF, Email Header, HTTP Header iNode, MFT Desktops Servers Windows Key
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Ethical Hacking Ethical Hacking Introduction – part 2 Course Info OS Windows / Linux Process / Privilege Rings Permissions / Owners OSI Model TCP/IP Application HTTP/S Methods, Headers TLS Handshake Encoding Base64, UTF, URL, GZip Data format Header, Magic Number XML, JSON DOCX Metadata EXIF, Email Header, HTTP Header iNode, MFT Desktops Servers Windows Key
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8. More on Sigma 16 Boolean Operations • There are a number of general well-known operations on the Boolean data set {F, T} (equivalently {L,H} or {0,1}). • We’ve already seen the NOT (INV) operation. This takes only 1 operand: it is what is called a unary operation. • There are three important binary Boolean
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Instructions: Andrew login ID: Full Name: Recitation Section: CS 15-213 / ECE 18-243, Spring 2010 Exam 1 Copyright By PowCoder代写 加微信 powcoder Version 1100101 Tuesday, March 2nd, 2010 • Make sure that your exam is not missing any sheets, then write your full name, Andrew login ID, and recitation section (A–J) on the front. Read
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CMPSC 450 definitions CMPSC 450 What is a ‘parallel computer’? • A parallel computer consists of a number of tightly-coupled compute elements that cooperatively solve a problem. • Example of `tight coupling’: shared caches, shared main memory, shared led system, high-speed access to data, high-speed network connecting compute nodes. • Cooperatively solving implies manual or
Modern Computer Architecture Sourced from Introduction: Modern Computer Architecture RRZE 2016. CMPSC 450 The Stored Program Computer • The modern design still based on Turing’s design in 1936. CMPSC 450 Simple instruction execution • Application Developer sees N adds as the work • Processor designer has a different perspective on work. Six instructions per add
Recall: Multithreaded Stack Example • Consider the following code blocks: proc A() { proc B() { Copyright By PowCoder代写 加微信 powcoder while(TRUE) { yield(); } • Suppose we have 2 threads: – Threads S and T run_new_thread run_new_thread Thread S’s switch returns to Thread T’s (and vice versa) Joseph & Kubiatowicz CS162 © UCB Spring
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Recall: Atomic Read-Modify-Write • test&set (&address) { result = M[address]; M[address] = 1; return result; Copyright By PowCoder代写 加微信 powcoder • swap (&address, register) { temp = M[address]; M[address] = register; register = temp; /* most architectures */ // return result from “address” and // set value at “address” to 1 // swap register’s value
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