ref: 1c0e91bc1b5dc31f51a1eb5acf5f99378e2c14af dir: /sys/src/libc/power/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4