refactor usb driver to use an internal memory structure

allocate scratchpad buffers whenever implemented

add system call to retrieve the physical location of a virutal address

initialize XHCI controller and correctly list anvailable slots

print basic XHCI information

add scanning for usb devices

precache pci devices

add lspci user programm

prevent bad behaviour when loading a service that has already been loaded

move 'gets'-functionality to ioManager to simplify the shell source code

add await syscall

update the cursor position in the vga driver

start the program name entered in the shell

add input buffering for the shell

check if a message should be printed to the main vga screen by checking if any syscall in the 'syscall stack' is the foreground process

pass keyboard input to shell

remove old log function, make \n mandatory for printing a new line

route the shell service to the vga output

rewrite general IO using an IO-manager

parse ps2 key codes

free the system call structure of a crashed system call process

add system call to look up the names of functions

add basic stack tracing ability

notify other tasks of a exception happening ...

subscribe to the interrupt 0 to be notified about exceptions

gracefully handle crashes of a user mode programm

fix interrupts occuring while in user mode

rename service proivder to service function ...

now matches the documentation in the wiki

free stack of unused system call processes ...

saves about 1/2 of previously used memory

add kernel events ...

kernel events get triggered by the kernel when certain things happen.
first example: log a message whenever a new programm is loaded from the initrd

improve log format by padding space for service names