ref: eca2dbed8b9872f8071b0e8ddc2d1da3f097f283 dir: /sys/src/libc/power/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4