ref: 7ff6ea0f70307d4b82e6df69eb1310a6e27aa4ad dir: /sys/src/libc/arm64/argv0.s/
GLOBL argv0(SB), $8 GLOBL _tos(SB), $8 GLOBL _privates(SB), $8 GLOBL _nprivates(SB), $4