// Without MAP_FIXED, Apple's mmap ignores addr.
// With MAP_FIXED, it overwrites already mapped regions, whic
// mmap(0, ... MAP_FIXED ...) is worst of all: It unmaps the program text
// Without MAP_FIXED, Apple's mmap ignores addr.
// With MAP_FIXED, it overwrites already mapped regions, whic
// mmap(0, ... MAP_FIXED ...) is worst of all: It unmaps the program text