ref: a1473ecf9fe13bbf8f9b5cb4f5fac9fc9f488bc4 dir: /sys/src/libc/mips/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4