Syscall

Calls made from Userland to the OS to access Kernel Level resources.

Syscall List

https://x86.syscall.sh/ You can view each syscall’s with man, like: man open

• open()
• exit()
• read()
• write()
• mmap()
• munmap()

System Call Errors

Syscalls will keep their error enum in errno that can be printed with perror()

Resources

• https://www.felixcloutier.com/x86/
• https://syscall.sh/
• http://ref.x86asm.net/coder64.html