ppc_xmalloc_test: Test ppc_xmalloc for memory allocation. Request 4000 bytes of memory using malloc: Request 4000 bytes of memory using malloc_or_exit: Request 4000 bytes of memory using ymalloc: Request 4000 bytes of memory: Request 0 bytes of memory: ppc_xmalloc_test.c: line 68: Illegal request for malloc() of 0 bytes. ppc_xmalloc_test: Normal end of execution.