System calls

System call (commonly abbreviated to syscall) is an entry point to execute a specific user program’s request to a service from the kernel. The operating system kernel runs in a privileged mode to protect sensitive software and hardware parts from the other software components. A user application executing in an unprivileged mode does not have access to the protected data. Performing a hardware interrupt or conducting a trap handled by the kernel, the user application can obtain sensitive data from the kernel, e.g. information about all processes running in the system.

• Prototypes and definition
• Adding syscall
• Debug
• Memory management
• Process management
• Threads management
• Threads synchronization
• Inter-process communication
• File operations
• Socket operations
• Interrupts management
• Performance monitoring
• Time management
• Platform management
• RISC-V specific