ref: a6ccb66d9c0748d44cd622d6a700d1ad6447cada
dir: /sys/src/libc/68000/main9p.s/
TEXT _mainp(SB), 1, $0 MOVL $a6base(SB), A6 MOVL R0, _tos(SB) PEA _profmain(SB) MOVL $0, TOS JMP _callmain(SB) TEXT _saveret(SB), 1, $0 TEXT _savearg(SB), 1, $0 RTS TEXT _callpc(SB), 1, $0 MOVL argp+0(FP), A0 MOVL 4(A0), R0 RTS