CSCI523, Homework 2

Using the operating system model handouts as an example,
please create a visual flow-control description of the
generic API service call such as open(), read(), etc.

The flow-control graph should begin with the user's call
the C library, the init 0x80 (or sysenter) trap, state
saver code, and syscall jump table.

The graph starts at the top of page with the name of a
function such as "open()" and employs arrows to show the
called functions.



                        Function A
                          / | \
                         /  |  \
                        /   |   \
        Args if helful /    |    \ Args if helpful
                      /     |     \
                 Function B |  Function D
                            |
                       Function C