--- xnu/xnu-12377.101.15/tests/memcmp_zero.c
+++ /dev/null
@@ -1,91 +0,0 @@
-#include <darwintest.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <mach/machine/vm_param.h>
-
-static inline unsigned char *
-get_guarded_page(void)
-{
-	unsigned char *p = mmap(NULL, 3 * PAGE_SIZE, PROT_NONE, MAP_SHARED | MAP_ANON, 0, 0);
-	p += PAGE_SIZE;
-	mprotect(p, PAGE_SIZE, PROT_READ | PROT_WRITE);
-	return p;
-}
-
-static inline void
-free_guarded_page(unsigned char *p)
-{
-	munmap(p - PAGE_SIZE, 3 * PAGE_SIZE);
-}
-
-/* memcmp_zero_ptr_aligned() checks string s of n bytes contains all zeros.
- * Address and size of the string s must be pointer-aligned.
- * Return 0 if true, 1 otherwise. Also return 0 if n is 0.
- */
-extern int
-memcmp_zero_ptr_aligned(const void *s, size_t n);
-
-T_DECL(memcmp_zero, "memcmp_zero")
-{
-	// the assembly version is for the kernel and doesn't support arm64_32
-#if defined(__arm64__) && __LP64__
-	unsigned char *buffer = get_guarded_page();
-	unsigned char *right = buffer + PAGE_SIZE - 512;
-	const int ptr_size = sizeof(buffer);
-
-	for (size_t i = 0; i < 256; i += ptr_size) {
-		for (size_t j = i; j < 256; ++j) {
-			for (size_t k = 0; k < 256; ++k) {
-				if (k < i) {
-					buffer[k] = (unsigned char)rand();
-				} else if (k < j) {
-					buffer[k] = '\0';
-				} else if (k == j) {
-					do {
-						buffer[k] = (unsigned char)rand();
-					} while (!buffer[k]);
-				} else {
-					buffer[k] = '\0';
-				}
-			}
-			for (size_t m = 0; m < 128; m += ptr_size) {
-				int result = memcmp_zero_ptr_aligned(&buffer[i], m);
-				int ref = j - i < m ? 1 : 0;
-				T_QUIET; T_ASSERT_EQ(result, ref, "expected %d, saw %d\n"
-				    "memcmp_zero_ptr_aligned(buf[%zd], %zd)\n",
-				    ref, result, i, m);
-			}
-
-
-			for (size_t k = 0; k < 256; ++k) {
-				if (k < i) {
-					right[k] = (unsigned char)rand();
-				} else if (k < j) {
-					right[k] = '\0';
-				} else if (k == j) {
-					do {
-						right[k] = (unsigned char)rand();
-					} while (!right[k]);
-				} else {
-					right[k] = '\0';
-				}
-			}
-			for (size_t m = 0; m < 256; m += ptr_size) {
-				int result = memcmp_zero_ptr_aligned(&right[i], m);
-				int ref = j - i < m ? 1 : 0;
-				T_QUIET; T_ASSERT_EQ(result, ref, "expected %d, saw %d\n"
-				    "memcmp_zero_ptr_aligned(buf[%zd], %zd)\n",
-				    ref, result, i, m);
-			}
-		}
-	}
-
-	T_PASS("success");
-
-	free_guarded_page(buffer);
-#else
-	T_SKIP("no optimized version to test");
-#endif
-}