ref: 6f80f6a7be43a1cef6597d7bd6e4db26e9ec15fa dir: /sys/src/libc/mips/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4