155 		 * In child, make sure there's something on the stack and  in TEST()
304 	unsigned long *stack;  in FIXTURE()  local
435 	self->stack = (void *)syscall(__NR_map_shadow_stack, 0,  in FIXTURE_SETUP()
438 	ASSERT_FALSE(self->stack == MAP_FAILED);  in FIXTURE_SETUP()
439 	ksft_print_msg("Allocated stack from %p-%p\n", self->stack,  in FIXTURE_SETUP()
440 		       self->stack + variant->stack_size);  in FIXTURE_SETUP()
447 	if (self->stack != MAP_FAILED) {  in FIXTURE_TEARDOWN()
448 		ret = munmap(self->stack, variant->stack_size);  in FIXTURE_TEARDOWN()
453 /* The stack has a cap token */
456 	unsigned long *stack = self->stack;  in TEST_F()  local
474 	ASSERT_EQ(stack[cap_index], GCS_CAP(&stack[cap_index]));  in TEST_F()
477 /* The top of the stack is 0 */
480 	unsigned long *stack = self->stack;  in TEST_F()  local
488 	ASSERT_EQ(stack[term_index], 0);  in TEST_F()
494 	self->stack[0] = 0;  in TEST_F_SIGNAL()
497 /* Put it all together, we can safely switch to and from the stack */
504 	/* Skip over the stack terminator and point at the cap */  in TEST_F()
517 	pivot_gcspr_el0 = &self->stack[cap_index];  in TEST_F()
532 	ASSERT_TRUE((unsigned long)get_gcspr() > (unsigned long)self->stack);  in TEST_F()
534 		    (unsigned long)self->stack + variant->stack_size);  in TEST_F()
536 	/* We should be able to use all but 2 slots of the new stack */  in TEST_F()
548 /* We fault if we try to go beyond the end of the stack */
555 	/* Skip over the stack terminator and point at the cap */  in TEST_F_SIGNAL()
570 	pivot_gcspr_el0 = &self->stack[cap_index];  in TEST_F_SIGNAL()
585 	ASSERT_TRUE((unsigned long)get_gcspr() > (unsigned long)self->stack);  in TEST_F_SIGNAL()
587 		    (unsigned long)self->stack + variant->stack_size);  in TEST_F_SIGNAL()
634 	void *stack;  in TEST_F()  local
636 	stack = (void *)syscall(__NR_map_shadow_stack, 0,  in TEST_F()
638 	ASSERT_TRUE(stack == MAP_FAILED);  in TEST_F()
639 	if (stack != MAP_FAILED)  in TEST_F()
640 		munmap(stack, variant->stack_size);  in TEST_F()
645 	unsigned long *stack;  in FIXTURE()  local
657 	self->stack = (void *)syscall(__NR_map_shadow_stack, 0,  in FIXTURE_SETUP()
659 	ASSERT_FALSE(self->stack == MAP_FAILED);  in FIXTURE_SETUP()
660 	ksft_print_msg("Allocated stack from %p-%p\n", self->stack,  in FIXTURE_SETUP()
661 		       self->stack + self->stack_size);  in FIXTURE_SETUP()
668 	if (self->stack != MAP_FAILED) {  in FIXTURE_TEARDOWN()
669 		ret = munmap(self->stack, self->stack_size);  in FIXTURE_TEARDOWN()
683 	ret = mprotect(self->stack, self->stack_size, variant->flags);  in TEST_F()
691 	ret = mprotect(self->stack, self->stack_size,  in TEST_F()
709 	 * from enabling the stack.  in main()