ref: 0a3eb7d6b1ef7e9ef569dcc8e73c98a8446b52fc dir: /sys/src/libc/mips/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4