// rt/syscall.s — Linux amd64 syscall trampoline. Args go in
// DI, SI, DX, R10, R8, R9 (the kernel ABI; userspace 4th is CX). We
// keep things minimal: rt_syscall(num, a1, a2, a3, a4, a5) → result.
//
// The first ww arg lands in DI (caller side); to use it as the
// syscall number we move it into AX. The 4th C-ABI arg comes in CX
// and must be moved to R10 for the kernel.
TEXT rt_syscall,$0
	MOVQ	DI, AX
	MOVQ	SI, DI
	MOVQ	DX, SI
	MOVQ	CX, DX
	MOVQ	R8, R10
	MOVQ	R9, R8
	SYSCALL
	RET