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Understanding Linux Kernel - Booting, Syscalls, Interrupts & Context Switching By Jayant Upadhyay 2003CS50214 Pankaj K. Sharma 2003CS50219 Sohit Bansal 2003CS50224
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Create new win brand, that supports execution of Windows applications on top of ... return (fd); 9. Project progress. Set of scripts for convenient brand testing ...
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MIPS R2000 Assembly Language Procedure Call, Interrupt, IO, Syscall
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they are much faster than memory (more than 10 times) ... callee save vs caller save. whichever that needs to save less registers. MIPS conventions ...
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How to add a new SysCall? Solution 1: Add in a new system call from scratch. Very complicated: ... How to add a new SysCall? ( cont'd) Solution 2: - a simple way ...
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ppc, s390, sh, sparc, sparc64. CS591 (Spring 2001) linux/drivers ... Saving registers on kernel mode stack. Invoking syscall service routine. ...
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Priviledge Levels: permissions set before syscalls ... Priviledge Levels: permissions set before syscalls. 0 FP. 1170s. 270 asserts. 294KLOC ...
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A look at the requirements for using Intel's syscall' and sysret' instructions in 64-bit mode ... selection of bits in the RFLAGS register when syscall' is executed ...
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Neither interrupt nor trap are function calls! ... Zombie. exit() syscall() - trap. wait() SW. HW. App. App. App. App. App. User mode. Kernel mode ...
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On x86 Pentium II processors and higher, Windows uses the special sysenter ... K6 and higher 32-bit AMD processors, Windows uses the special syscall ...
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Represent the system call trace as a non-deterministic finite automaton (NDFA) ... paths (by characterizing more precisely the set of possible syscall traces) ...
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Due metodi usati dal kernel di Linux per. implementare system call: lcall7 ... sono implementate in modo diverso dal. kernel (socket related 'syscall' sono ...
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... a system call, type 'man syscall', where syscall is the name of the system call ... must have execute permission in directory to open file ...
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Assembly Language Working with the CPU
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R2: An application-level kernel for record and replay Z. Guo, X. Wang, J. Tang, X. Liu, Z. Xu, M. Wu, M. F. Kaashoek, Z. Zhang, (MSR Asia, Tsinghua, MIT), OSDI 08
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File I/O I/O Flags Flags are passed to give some information about how the file is to be used. Read only file flag=0x0 Write only file flag=0x1 Read and write ...
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Forensic Toolkit. Helix. tend to focus on dead data. only useful if malware hits the disk ... be the platform for forensic sound analysis of data from live systems ...
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A rootkit is malware which consists of a set of programs designed to hide or ... the copy protection measures included by Sony BMG on compact discs in 2005. ...
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Architectural Support for Operating Systems Prof. Sirer CS 4410 Cornell University
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Rootkit: Analysis, Detection and Protection Igor Neri Sicurezza Informatica Prof. Bistarelli Definition of Rootkit A rootkit is malware which consists of a set of ...
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Lecture 7: MARS, Computer Arithmetic Today s topics: MARS intro Numerical representations Addition and subtraction*
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... Sony PlayStation 2 console, and Sony PSP handheld system use MIPS processors. ... Instructions go here. Contains the beginning of the program. Data ...
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Develop a tool for the automated synthesis of Custom Kernel Library ... Project was aimed at developing to automate the ... final bootable binary. HOW ...
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Title: Man in the middle attacks Last modified by: ALoR Created Date: 6/2/2002 1:31:47 PM Document presentation format: Presentazione su schermo Other titles
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College of Computer Sciences and Engineering. King Fahd University of Petroleum and Minerals ... Halfword address should be a multiple of 2 .ALIGN n directive ...
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MOPS: an Infrastructure for Examining Security Properties of Software Authors: Hao Chen, David Wagner University of California at Berkeley Publish: ACM Computer and ...
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BORPH: Berkeley Operating System for ReProgrammable Hardware
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Announcements Keep those group emails coming What I learned from Who s who forms Objective of the lecture Abstractions provided by OS system call interface
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CWRU EECS 322 March 8, 2000. The SPIM simulator. EECS 322: ... Von Neuman & Harvard ... http://vip.cs.utsa.edu/classes/cs2734s98/overview.html ...
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Semaphores and Mailboxes
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Week 7 System Calls, Kernel Threads, Kernel Debugging Sarah Diesburg Florida State University *
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Exploiting Software: How To Break Code Seminario originariamente preparato da Nicola Bonelli Angelo Dell'Aera
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A Comparison of Software and Hardware Techniques for x86 Virtualization By Keith Adams and Ole Ageson VMWare Presented by Mike Marty The Renaissance of Virtualization ...
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Register Set. UTCB. Read UL Memory. Page-Fault. Stack: per Thread. Memory: per Address Space. Parameter passing. User Stack / Memory. Register Set. UTCB ...
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But this technique still works for backward compatibility. ... name,type1,arg1) type and name same as before. type1 : type of first argument. name1 : name of ...
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Project 2: User Programs Presented by Jaishankar Sundararaman Acknowledgement: Some s taken from Abdelmounaam Rezgui s and John Wiseman's presentation
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Process Management baseado na vers o 2.6 do kernel do Linux PESC / COPPE / UFRJ Sistemas Operacionais Prof. Vitor Santos Costa, Ph.D. Jorge Luiz Silva Peixoto
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... profiling, monitoring, coverage testing, security auditing... by basic block, right before each new basic block is executed. ... Software ...
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( Ref: money.cnn.com) Traded: NASDAQ, INTC ( http://money.langenberg.com ... du jour: Intel Corporation www.intel.com. CWRU EECS 314. 3. Instruction Set ...
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Caught by Single-stepping Checks. No. Yes. Uses INT 3's and Debug ... Caught by Registration-based Debugger Checks (e.g. Ptrace(), signal()) Helikaon. Debugger ...
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Installing SPIM on Ubuntu Linux. Open the Synaptic Package Manager. Click Settings ... NOTE: This was done on Ubuntu Linux 6.06 LTS (Dapper Drake) Text Segment ...
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Sarah Diesburg & Louis Brooks Introduction Previous Work St. Michael Design Philosophy What we monitor System Call Mappings System Call Integrity Module Hiding ...
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The boot loader can be modified to apply patches to the kernel just before the start phase. ... The projects Blue Pill and SubVirt published working proof-of ...
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Data storage Direct Mapping. Data storage Single Indirect. 4KB data block ... Simply copy verbatim from GOSFS_Dir_Entry. SYS_SEEK. Seek(int fd, int offset) ...
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Data storage Single Indirect. Data storage Double Indirect. 4KB data ... Works on an unopened file. Simply copy verbatim from GOSFS_Dir_Entry. SYS_FSTAT ...
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How do we evaluate the security of a host-based IDS ... Conservative design ... Can take control of app undetected [Conservative design ] Disguising the Payload ...
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Write the system call code as a kernel function. Be careful when reading/writing to user-space ... name1 : name of first argument _syscall1(void,foo,int,arg) ...
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MIPS Assembly Language I
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... in your SPIM program. COMPUTER ORGANIZATION ... SPIM assumes the data section is at the beginning ... Sample assembly code No. 2 for testing SPIM Simulator. ...
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Lecture 6: Compilers, the SPIM Simulator
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Linux Overview Anand Sivasubramaniam Dept. of Computer Science & Eng. The Pennsylvania State University Why Linux? It s free! Open Source (modifiability ...
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Before process p resumes execution in user mode, kernel checks for ... Process first executes signal handler in user mode before resuming 'normal' execution. ...
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Transient Fault Tolerance via Dynamic Process-Level Redundancy Alex Shye, Vijay Janapa Reddi, Tipp Moseley and Daniel A. Connors University of Colorado at Boulder
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