ref: 69ad74ec96187d96516f1c7e0f7e95063bdee47f dir: /sys/src/libc/arm64/main9.s/
TEXT _main(SB), 1, $0 SUB $16, SP MOV $setSB(SB), R28 MOV R0, _tos(SB) MOV $main(SB), R0 MOV $0, R30 B _callmain(SB)