remove a mapping
Standard C Library (libc, -lc)
() system call deletes the mappings
and guards for the specified address range, and causes further references to
addresses within the range to generate invalid memory references.
() function returns the
value 0 if successful; otherwise the value -1 is returned and
the global variable errno
is set to indicate
() system call will fail if:
- The addr argument was not page aligned,
the len argument was zero or negative, or
some part of the region being unmapped is outside the valid address range
for a process.
() system call first appeared in