add: if (!arch_vm_supports_protection(protection)) return B_NOT_SUPPORTED;
context: vm_map_file(aspace_id aid, const char *name, void **address, uint32 addressSpec,	addr_t size, uint32 protection, uint32 mapping, const char *path, off_t offset){	return _vm_map_file(aid, name, address, addressSpec, size, protection, mapping, path, offset, true);}