MAP_STACK
MAP_FIXED|MAP_STACK|MAP_ANON|MAP_PRIVATE, -1, 0) == MAP_FAILED) {
MAP_PRIVATE | MAP_ANON | MAP_STACK, -1, 0);
pflags |= MAP_STACK;
if (flags & MAP_STACK)
if (flags & MAP_STACK)
if (flags & MAP_STACK) {
if (flags & ~(MAP_STACK|MAP_FIXED|MAP_ANON|MAP_PRIVATE))