ref: 1c3a6fc67e6df47e49a9aa6bb13ddfb75852b99c dir: /sys/src/libc/power/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4