Syscalls

Every program interacts with the operating system through system calls (syscalls). These calls are the gateway between user-space applications and kernel functionality, handling operations like file I/O, memory management, and process control.

To illustrate, here’s a simple C example showing how to write a message to standard output using a syscall:

This minimal example bypasses higher-level abstractions like printf and directly calls the kernel to output text. It’s a small demonstration of how low-level operations work under the hood.

Grim Labs is starting to document experiments and research systematically, and this post serves as a first technical entry. Future posts will expand into more complex syscalls, experiments, and exploratory projects.