ref: 23f3d33cdbbfdf2f169f1d7c4acf1f947ed5f5c5 dir: /sys/src/libc/power/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4