55  *   1. hppa takes bottom of stack and no stacksize (stack grows up)
56  *   2. __ia64__ takes bottom of stack and uses clone2
57  *   3. all others take top of stack (stack grows down)
61 	   size_t stack_size, void *stack, pid_t *ptid, void *tls, pid_t *ctid)  in ltp_clone_()  argument
66 	ret = __clone2(fn, stack, stack_size, flags, arg, ptid, tls, ctid);  in ltp_clone_()
70 	 * These arches grow their stack up, so don't need to adjust the base.  in ltp_clone_()
75 	 * For archs where stack grows downwards, stack points to the topmost  in ltp_clone_()
76 	 * address of the memory space set up for the child stack.  in ltp_clone_()
78 	if (stack)  in ltp_clone_()
79 		stack += stack_size;  in ltp_clone_()
82 	ret = clone(fn, stack, flags, arg, ptid, tls, ctid);  in ltp_clone_()
89               size_t stack_size, void *stack)  in ltp_clone()  argument
91 	return ltp_clone_(flags, fn, arg, stack_size, stack, NULL, NULL, NULL);  in ltp_clone()
95                size_t stack_size, void *stack, ...)  in ltp_clone7()  argument
101 	va_start(arg_clone, stack);  in ltp_clone7()
107 	return ltp_clone_(flags, fn, arg, stack_size, stack, ptid, tls, ctid);  in ltp_clone7()
111  * ltp_alloc_stack: allocate stack of size 'size', that is sufficiently
114  * Returns pointer to new stack. On error, returns NULL with errno set.
136 	void *stack;  in ltp_clone_alloc()  local
140 	stack = ltp_alloc_stack(stack_size);  in ltp_clone_alloc()
141 	if (stack == NULL)  in ltp_clone_alloc()
144 	ret = ltp_clone(clone_flags, fn, arg, stack_size, stack);  in ltp_clone_alloc()
148 		free(stack);  in ltp_clone_alloc()
156  * ltp_clone_quick: calls ltp_clone_alloc with predetermined stack size.