ref: 0e96fd0197e0ce8d4e69cb1e0dc96dcfb4bb3a1e dir: /sys/src/libc/mips/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4