mmap2 - map files or devices into memory
This is probably not the system call that you are interested in; instead, see mmap(2), which describes the glibc wrapper function that invokes this system call.
The mmap2() system call provides the same interface
as mmap(2), except that the final argument specifies
the offset into the file in 4096-byte units (instead of bytes, as is
done by mmap(2)). This enables applications that use a
off_t to map large files (up to 2^44 bytes).
On success, mmap2() returns a pointer to the mapped
area. On error, -1 is returned and
errno is set
This system call is Linux-specific.
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