MMAP_PROT         256 lj_alloc.c         void *p = mmap((void *)hint_addr, size, MMAP_PROT, MMAP_FLAGS_PROBE, -1, 0);
MMAP_PROT         317 lj_alloc.c         void *ptr = mmap((void *)LJ_ALLOC_MMAP32_START, size, MMAP_PROT, MAP_32BIT|MMAP_FLAGS, -1, 0);
MMAP_PROT         340 lj_alloc.c       void *ptr = mmap(NULL, size, MMAP_PROT, MMAP_FLAGS, -1, 0);