ref: 26f0aa33d91442fc7a56fc5f5c9b56b5f5f84ce2 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