STACK_SIZE
stack = malloc(STACK_SIZE);
uctx_switch.uc_stack.ss_size = STACK_SIZE;
if (len <= STACK_SIZE - GUARD_SIZE) {
addr = addr - (STACK_SIZE - GUARD_SIZE - len);
len = STACK_SIZE - GUARD_SIZE;
for (i = 0; i < STACK_SIZE; i++)
static char child_stack[STACK_SIZE];
pid_t child = clone(ChildFunc, child_stack + STACK_SIZE,
pid_t child = clone(NSInit, child_stack + STACK_SIZE,
pid_t child = clone(NSInit, child_stack + STACK_SIZE,