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-rw-r--r--lib/string.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/string.c b/lib/string.c
index b375b8124a9..2c4f0ec9a11 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -467,6 +467,9 @@ void * memcpy(void *dest, const void *src, size_t count)
unsigned long *dl = (unsigned long *)dest, *sl = (unsigned long *)src;
char *d8, *s8;
+ if (src == dest)
+ return dest;
+
/* while all data is aligned (common case), copy a word at a time */
if ( (((ulong)dest | (ulong)src) & (sizeof(*dl) - 1)) == 0) {
while (count >= sizeof(*dl)) {
@@ -497,6 +500,9 @@ void * memmove(void * dest,const void *src,size_t count)
{
char *tmp, *s;
+ if (src == dest)
+ return dest;
+
if (dest <= src) {
tmp = (char *) dest;
s = (char *) src;