ref: 3462ec9bdc97d2e56a193bb8ed6cb4a01a8e4ef8 dir: /sys/src/cmd/aux/flashfs/aux.h/
void* emalloc9p(ulong sz); void* erealloc9p(void *v, ulong sz); char* estrdup9p(char *s); #define DMDIR CHDIR