i want to access my system resources such as CPU without the use of OS system calls.
is there any way to make this possible?
i want to access my system resources such as CPU without the use of
Share
Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
i want to access my system resources such as CPU without the use of OS system calls.
is there any way to make this possible?
The only way to access the hardware directly on most modern operating systems, Linux and Windows included, is via kernel code. Linux Device Drivers is an excellent starting point for writing such code on Linux, even if it is a bit dated.
Otherwise, the OS provides various I/O facilities and controls the allocation of resources to the user applications, using the system call interface. The system call interface is omnipresent in its basic concept among all operating systems that actually have some sort of separation between kernel and user code. The use of software interrupts is the standard way to implement system calls on current hardware.
You need a system call to allocate the slightest amount of memory and even to read or write a single character. Not to mention that even a program that does absolutely nothing generally needs a few system calls just to be loaded.
You could gain more direct access to the hardware if you used DOS or an exokernel design.
But why would you want to do that anyway? Modern hardware is far from trivial to work with directly.