system call

Let us try to create a toy system call to do add operation, which takes 2 arguments and return their added value. Following are the steps in adding a new system call to Linux Kernel: Step 1: Unzip and untar the latest Linux kernel source (https://www.kernel.org currently 3.14 is the stable version) into /usr/src/ directory. Step […]

System calls are used by user programs in order get service from the operating system. Some of the popular system calls are we normally use are open, read, write, close, wait, exec, fork, exit, and kill. There are usually 100’s of system call available in OS. For example, Linux has 300+ system calls. Why we […]