ref: 5d0758b3eea7b9b7b0dac1e2ec3254f11ba4e6cb 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