ref: 9fcce48b3859f3aa5a784efba460ad2b090bf7a8
dir: /sys/src/libc/arm64/setjmp.s/
TEXT setjmp(SB), 1, $-4 MOV LR, 8(R0) MOV SP, R1 MOV R1, 0(R0) MOV $0, R0 RETURN TEXT longjmp(SB), 1, $-4 MOV 8(R0), LR MOV 0(R0), R1 MOVW arg+8(FP), R0 MOV R1, SP CBZ R0, _one RETURN _one: MOV $1, R0 RETURN