23.2 Environment

Implementation-Defined Behavior for Environment is covered in section G.3.2 of the ANSI C Standard.

What library facilities are available to a freestanding program? (ISO 5.1.2.1)

All of the facilities of the standard C library are available, provided that a small set of functions is customized for the environment, as described in the “Run Time Libraries” section.

Describe program termination in a freestanding environment. (ISO 5.1.2.1)

If the function main returns or the function exit is called, a HALT instruction is executed in an infinite loop. This behavior is customizable.

Describe the arguments (parameters) passed to the function main? (ISO 5.1.2.2.1)

No parameters are passed to main.

Which of the following is a valid interactive device: (ISO 5.1.2.3)

Asynchronous terminal No

Paired display and keyboard No

Inter program connection No

Other, please describe? None