Fix strings search looping

boot/common-boot.s

@@ -425,6 +425,9 @@ _memcpy:
 
 	addi a0, a0, 1
 	addi a1, a1, 1
+	addi a2, a2, -1
+
+	j .Lmemcpy_loop
 
 .Lmemcpy_end:
 	mv a0, t0
@@ -473,6 +476,8 @@ _strings_index:
 	beqz a0, .Lstrings_index_end
 
 .Lstrings_index_next:
+	# Advance the pointer, reduce the length.
+	lw a2, (s2)
 	addi s2, s2, 4
 	add s2, s2, a2
 	addi s1, s1, -1