ref: fbc0b1f63460fd0ff0ff9f5d7c06bf5c5fd48b82 dir: /sys/src/libc/power/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4