How Do You Write a System Call in Linux?

How do you write a system call?

System Details

1. Download the kernel source: …
2. Extract the kernel source code. …
3. Define a new system call sys_hello( ) …
4. Adding hello/ to the kernel’s Makefile: …
5. Add the new system call to the system call table: …
6. Add new system call to the system call header file: …
7. Compile the kernel: …
8. Install / update Kernel:

11 июл. 2018 г.

What is the system call in Linux?

The system call is the fundamental interface between an application and the Linux kernel. System calls and library wrapper functions System calls are generally not invoked directly, but rather via wrapper functions in glibc (or perhaps some other library).