ref: bfc8cdfff5aba1da7ddef1c2ef7e1167f8dd2e8d dir: /sys/src/libc/power/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4