ref: 4fe48dc6b0bc5cd6a2eaf603fd1b7ed885bcd46a dir: /sys/src/libc/sparc/argv0.s/
GLOBL argv0(SB), $4 GLOBL _tos(SB), $4 GLOBL _privates(SB), $4 GLOBL _nprivates(SB), $4