diff --git a/lib/libc/gen/dlfcn.c b/lib/libc/gen/dlfcn.c
--- a/lib/libc/gen/dlfcn.c
+++ b/lib/libc/gen/dlfcn.c
@@ -256,8 +256,23 @@
 int
 _rtld_get_stack_prot(void)
 {
+#ifndef IN_LIBDL
+	unsigned i;
+	int ret;
 
+	_once(&dl_phdr_info_once, dl_init_phdr_info);
+	for (i = 0; i < phdr_info.dlpi_phnum; i++) {
+		if (phdr_info.dlpi_phdr[i].p_type != PT_GNU_STACK)
+			continue;
+		ret = PROT_READ | PROT_WRITE;
+		if ((phdr_info.dlpi_phdr[i].p_flags & PF_X) != 0)
+			ret |= PROT_EXEC;
+		return (ret);
+	}
 	return (PROT_EXEC | PROT_READ | PROT_WRITE);
+#else
+	return (0);
+#endif
 }
 
 #pragma weak _rtld_is_dlopened