ref: 61c82d2bb83ae7c8d6bc47d0ea2b1bd5a117b4f0 dir: /sys/src/libc/power/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4