Understanding cmp Instruction in Assembly and Debugging with GDB

I’ve come across a specific instruction sequence that I need help understanding, particularly the comparison (`cmp`) operation and how to break at this point in GDB on an Intel Core […]

Can I Directly Update the TLB During a Page Fault on x86-64?

I’m working with x86-64 architecture in long mode and want to know if it’s possible to directly update the Translation Lookaside Buffer (TLB) with a mapping from a virtual address […]

Optimizing a bubble sort implementation in C for an x86-64 architecture

Hello , I’m working on optimizing a bubble sort implementation in `C` for an `x86-64` architecture specifically targeting an Intel Core i7 processor using `GCC 11.2` . I noticed that […]

Why did the value of the rbx register change unexpectedly in GDB?

I am debugging a program on an `x86-64` system `Ubuntu 22.04` `GDB v10.2` `GCC 11.2.0` using `GDB` and encountered an unexpected behavior. I was inspecting the value of the `rbx` […]

Why does my assembly network server application cause a segmentation fault?

I’m working on a network server application in assembly language so I can understand low level networking concepts. So I’ve implemented a socket server using assembly language system calls, but […]

Why is the XOR operation not toggling the player variable in my x86 assembly tic-tac-toe game?

I am working on a text based tic-tac-toe game for some users, using x86 assembly on an Intel Core i7 12700K systems running Ubuntu 22.04. I’m using NASM assembler and […]

Optimizing a bubble sort implementation in C for an x86-64 architecture

Hello , I’m working on optimizing a bubble sort implementation in `C` for an `x86-64` architecture specifically targeting an Intel Core i7 processor using `GCC 11.2` . I noticed that […]

Why did the value of the rbx register change unexpectedly in GDB?

I am debugging a program on an `x86-64` system `Ubuntu 22.04` `GDB v10.2` `GCC 11.2.0` using `GDB` and encountered an unexpected behavior. I was inspecting the value of the `rbx` […]

Why is the XOR operation not toggling the player variable in my x86 assembly tic-tac-toe game?

I am working on a text based tic-tac-toe game for some users, using x86 assembly on an Intel Core i7 12700K systems running Ubuntu 22.04. I’m using NASM assembler and […]