glibc/sysdeps/unix/mman/syscalls.list

# This interface desciption corresponds to the POSIX.1 description.  The
# 4.4BSD interface is slightly different since the `msync' function takes
# only 2 arguments.

# File name	Caller	Syscall name	# args	Strong name	Weak names

madvise		-	madvise		3	madvise
mmap		-	mmap		6	__mmap		mmap
mprotect	-	mprotect	3	__mprotect	mprotect
msync		-	msync		3	__libc_msync	msync
munmap		-	munmap		2	__munmap	munmap