fix undefined pointer comparison in memmove

[musl] / src / string / memmove.c

diff --git a/src/string/memmove.c b/src/string/memmove.c
index 27f670e..f225bb3 100644 (file)
--- a/src/string/memmove.c
+++ b/src/string/memmove.c
@@ -10,7 +10,7 @@ void *memmove(void *dest, const void *src, size_t n)
        const char *s = src;
 
        if (d==s) return d;
-       if (s+n <= d || d+n <= s) return memcpy(d, s, n);
+       if ((uintptr_t)s-(uintptr_t)d-n <= -2*n) return memcpy(d, s, n);
 
        if (d<s) {
                if ((uintptr_t)s % WS == (uintptr_t)d % WS) {