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3.3.1 Important Points in Using Unlink

When a module is being unlinked, dld tries to clean up as much as it can to restore the executing process to a state as if this module has never been linked. This clean up includes removing and reclaiming the memory for storing the text and data segment of the module, and un-defining any global symbols defined by this module.

However, side effects--such as modification of global variables, input/output operations, and allocations of new memory blocks--caused by the execution of any function in this module are not reversed. Thus, it is the responsibility of the programmer to explicitly carry out all necessary clean up operations before unlinking a module.

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