ref: bd773dee09460f5d77c96f2fe3d34ec5ee0b54ce dir: /sys/src/ape/lib/ap/mips/main9.s/
GLOBL _tos(SB), $4 TEXT _main(SB), 1, $0 ADD $-8, R29 MOVW $setR30(SB), R30 MOVW R1, _tos(SB) MOVW $_apemain(SB), R1 MOVW $0, R31 JMP _callmain(SB)