More About Jumps Than You Wanted to Know
7 days ago
- #programming
- #assembly
- #x86-64
- The post is part of a series on x86-64 assembly programming, focusing on jumps and program flow control.
- Discusses unconditional jumps (jmp) and their various encodings, including relative and absolute jumps.
- Explains the concept of position-independent code and the challenges of address space layout randomization (ASLR).
- Covers the call and ret instructions, detailing how they manage function calls and returns.
- Introduces the syscall instruction, explaining its role in system calls and how it differs between Windows and Linux.
- Details comparison operations (cmp) and conditional jumps (jz, jnz, ja, jb, etc.), essential for implementing ifs and loops.
- Provides an example of a loop in assembly to compute the Fibonacci sequence.
- Concludes with recommendations for further learning and acknowledgments.