ref: 6ca9ff033b2cd9fcff7587e1bbd3c5ed3a5dcbb4 dir: /sys/src/libc/alpha/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4