ref: 6ca9ff033b2cd9fcff7587e1bbd3c5ed3a5dcbb4 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