ref: 1e438bc219c5b6ba14fd4ee5f15d755dd2d2a3ff dir: /sys/src/libc/68020/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4