//
//go:linkname exit
//go:nosplit
//go:cgo_unsafe_args
func exit(code int32) {
	libcCall(unsafe.Pointer(abi.FuncPCABI0(exit_trampoline)), unsafe.Pointer(&code))
}
func exit_trampoline()

//go:nosplit
//go:cgo_unsafe_args
func getthrid() (tid int32) {
	libcCall(unsafe.Pointer(abi.FuncPCABI0(getthrid_trampoline)), unsafe.Pointer(&tid))
	return
}
func getthrid_trampoline()

	entersyscall()
	libcCall(unsafe.Pointer(abi.FuncPCABI0(syscall)), unsafe.Pointer(&fn))
	exitsyscall()
	return
}
func syscall()

//go:linkname syscall_syscallX syscall.syscallX
//go:nosplit
//go:cgo_unsafe_args
func syscall_syscallX(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
	entersyscall()
	libcCall(unsafe.Pointer(abi.FuncPCABI0(syscallX)), unsafe.Pointer(&fn))
	exitsyscall()

		mp.libcallsp = getcallersp()
	} else {
		mp = nil
	}

	var libcall libcall
	libcall.fn = uintptr(unsafe.Pointer(fn))
	libcall.n = 4
	libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
	if mp != nil {
		mp.libcallsp = 0
	}
	return libcall.r1
}

//go:nosplit
//go:cgo_unsafe_args

func syscall_chdir(path uintptr) (err uintptr) {
	call := libcall{
		fn:   uintptr(unsafe.Pointer(&libc_chdir)),
		n:    1,
		args: uintptr(unsafe.Pointer(&path)),
	}
	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
	return call.err
}

//go:nosplit
//go:linkname syscall_chroot
func syscall_chroot(path uintptr) (err uintptr) {
	call := libcall{
		fn:   uintptr(unsafe.Pointer(&libc_chroot)),
		n:    1,

	MOVM.DB.W [R4, R5, R14], (R13)	// push {r4, r5, lr}
	MOVW	R0, R4			// put libcall * in r4
	MOVW	R13, R5			// save stack pointer in r5

	// SetLastError(0)
	MOVW	$0, R0
	MRC	15, 0, R1, C13, C0, 2
	MOVW	R0, 0x34(R1)

	MOVW	8(R4), R12	// libcall->args

	// Do we have more than 4 arguments?
	MOVW	4(R4), R0	// libcall->n
	SUB.S	$4, R0, R2
	BLE	loadregs

	// Reserve stack space for remaining args

TEXT asmsyscall6<>(SB),NOSPLIT,$256
	// Save libcall for later
	MOVD	R3, 112(R1)
	MOVD	libcall_fn(R3), R12
	MOVD	libcall_args(R3), R9
	MOVD	0(R9), R3
	MOVD	8(R9), R4
	MOVD	16(R9), R5
	MOVD	24(R9), R6
	MOVD	32(R9), R7
	MOVD	40(R9), R8
	BL	callCfunction<>(SB)

	// Restore R0 and TOC
	XOR	R0, R0
	MOVD	40(R1), R2

	// Store result in libcall
	MOVD	112(R1), R5
	MOVD	R3, (libcall_r1)(R5)

_2args:
	MOVD	(1*8)(R12), R1
_1args:
	MOVD	(0*8)(R12), R0
_0args:

	MOVD	libcall_fn(R19), R12	// branch to libcall->fn
	BL	(R12)

	MOVD	R20, RSP			// free stack space
	MOVD	R0, libcall_r1(R19)		// save return value to libcall->r1
	// TODO(rsc) floating point like amd64 in libcall->r2?

	// GetLastError
	MOVD	TEB_error(R18_PLATFORM), R0
	MOVD	R0, libcall_err(R19)

	// Restore callee-saved registers.

	LEAQ	72(SP), AX
	MOVQ	DI, 0(SP)
	MOVQ	AX, 8(SP)
	MOVQ	$runtime·badsignal(SB), AX
	CALL	AX
	JMP	exit

allgood:
	// Save m->libcall and m->scratch. We need to do this because we
	// might get interrupted by a signal in runtime·asmcgocall.

	// save m->libcall
	MOVQ	g_m(R10), BP
	LEAQ	m_libcall(BP), R11
	MOVQ	libcall_fn(R11), R10
	MOVQ	R10, 72(SP)
	MOVQ	libcall_args(R11), R10
	MOVQ	R10, 80(SP)

//
//go:nosplit
//go:cgo_unsafe_args
//go:linkname syscall_syscall6
func syscall_syscall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
	c := libcall{
		fn:   fn,
		n:    nargs,
		args: uintptr(unsafe.Pointer(&a1)),
	}

	entersyscallblock()
	asmcgocall(unsafe.Pointer(&asmsyscall6), unsafe.Pointer(&c))
	exitsyscall()
	return c.r1, 0, c.err
}