ref: 962c2c6b8d008abfab2dce9e77b54aaa25860a9c dir: /sys/src/libc/power/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4