Downloaded 97 times
Uploaded bySam Bowne
CNIT 127 Lecture 7: Intro to 64-Bit Assembler (not in book)
This document discusses 64-bit assembly programming. It covers 64-bit registers used in 64-bit assembly like RIP and RSP. It also discusses limitations of 64-bit addressing in different versions of Windows and how the operating system separates memory used by the OS and user programs. Common opcodes, syscalls, and using sections like .data and .text are described. Examples shown include simple programs, reading and writing data, and encoding text using Caesar cipher and XOR encryption.
More Related Content
Similar to CNIT 127 Lecture 7: Intro to 64-Bit Assembler (not in book)
CNIT 127 Lecture 7: Intro to 64-Bit Assembler (not in book)
- 1. CNIT 127: ExploitDevelopment Lecture 7: 64-bit Assembler Not in textbook Rev. 3-9-17
- 2. 64-bit Registers • rip= Instruction pointer • rsp = top of stack
- 4. Windows Limitations • Windowsdoesn't implement full 64-bit addressing • Windows 2008 Server uses 44 bits – Max. 16 TB RAM • Windows 8.1, 2015 revision, uses 48 bits – Max. 256 TB RAM • Links Ch L7d, L7e
- 5. OS Limitations • OSuses top half • User programs use lower half
- 6. System Calls • syscallreplaces INT 80
- 7. L7h: Searchable LinuxSyscall Table
- 8. L7c: Introduction tox64 Assembly Intel Developer Zone • More details about registers
- 9.
- 10.
- 11.
- 12.
- 13.
- 14.
- 15.
- 16. Using a .datasection • db = "Define Byte"
- 17.
- 18. Using gdb • .dataand .text sections appear the same
- 19. .text and .dataSections
- 20.
- 21.
- 22. "echo" with a.data section
- 23. Works with Junkat End
- 24.
- 25. Works for 4Bytes Only
- 26. Objdump Shows a32-bit Value
- 27. Intel 64 andIA-32 Architectures Software Developer's Manual
- 28. Must use aRegister
- 29.
- 30. Challenge 1 "Hello fromYOURNAME"
- 31. Challenge 2 Caesar (3steps back)
- 32. Challenge 3: XOREncryption