ref: 5c5c1b666681cb3e8d2adbfe2ade22fe8447ffc2 dir: /sys/src/libc/mips/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4