Hello all,
I just want to ask a few questions about system calls in linux...
1-) Why do we use asm_linkage while adding a system call??
2-) What does copy_from_user and copy_to user do?? And which situations do we use these functions??
3-) How does an operating system understand that a called function is a system call and how it reacts??
As you see my questions are theoric because I should learn the theory of system calls...
If you help me, I will be pleased...
Regards...