ref: a19d90dc8c4d48ec613ac3e2e1462b9099c0a857
dir: /sys/src/libc/power/main9p.s/
TEXT _mainp(SB), 1, $0 SUB $8, R1 MOVW $setSB(SB), R2 MOVW R3, _tos(SB) MOVW $_profmain(SB), R3 MOVW R0, LR MOVW $_callmain(SB), R4 MOVW R4, CTR BR (CTR) TEXT _saveret(SB), 1, $0 TEXT _savearg(SB), 1, $0 RETURN TEXT _callpc(SB), 1, $0 MOVW argp-4(FP), R3 RETURN