ref: c28f07b5840216c4e83e1d3b21d8a9ed7c41f8f9
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