// call on the stack will cause gentraceback to stop walking the stack
// prematurely and if there is leftover state it may panic.
func goexit(neverCallThisFunction)

// publicationBarrier performs a store/store barrier (a "publication"
// or "export" barrier). Some form of synchronization is required
// between initializing an object and making that object accessible to

	BL	runtime·emptyfunc(SB)	// fault if stack check is wrong
	BL	runtime·mstart(SB)

	// Exit the thread.
	MOVW	$0, R0
	MOVM.IA.W (R13), [R4-R11, R15]		// pop {r4-r11, pc}

TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	B	runtime·armPublicationBarrier(SB)

// never called (this is a GOARM=7 platform)
TEXT runtime·read_tls_fallback(SB),NOSPLIT,$0
	MOVW	$0xabcd, R0
	MOVW	R0, (R0)
	RET

	MOVW arg+8(FP), R2
	SWI $SYS_fcntl
	MOVW $0, R1
	MOVW.CS R0, R1
	MOVW.CS $-1, R0
	MOVW R0, ret+12(FP)
	MOVW R1, errno+16(FP)
	RET

// TODO: this is only valid for ARMv7+
TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	B	runtime·armPublicationBarrier(SB)

TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0
	MOVM.WP [R1, R2, R3, R12], (R13)
	SWI $SYS__lwp_getprivate

	JMP	runtime·memhash64Fallback(SB)

TEXT runtime·return0(SB), NOSPLIT, $0-0
	MOVD $0, RET0
	RET

TEXT runtime·asminit(SB), NOSPLIT, $0-0
	// No per-thread init.
	RET

TEXT ·publicationBarrier(SB), NOSPLIT, $0-0
	RET

TEXT runtime·procyield(SB), NOSPLIT, $0-0 // FIXME
	RET

TEXT runtime·breakpoint(SB), NOSPLIT, $0-0
	UNDEF

// func switchToCrashStack0(fn func())

	MOVW $SYS_fcntl, R7
	SWI $0
	MOVW $0, R1
	MOVW.CS R0, R1
	MOVW.CS $-1, R0
	MOVW R0, ret+12(FP)
	MOVW R1, errno+16(FP)
	RET

// TODO: this is only valid for ARMv7+
TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	B	runtime·armPublicationBarrier(SB)

// TODO(minux): this only supports ARMv6K+.
TEXT runtime·read_tls_fallback(SB),NOSPLIT|NOFRAME,$0
	WORD $0xee1d0f70 // mrc p15, 0, r0, c13, c0, 3

// this for us.

TEXT kernelPublicationBarrier<>(SB),NOSPLIT,$0
	// void __kuser_memory_barrier(void);
	MOVW	$0xffff0fa0, R11
	CALL	(R11)
	RET

TEXT ·publicationBarrier(SB),NOSPLIT,$0
	MOVB	·goarm(SB), R11
	CMP	$7, R11
	BLT	2(PC)
	JMP	·armPublicationBarrier(SB)
	JMP	kernelPublicationBarrier<>(SB) // extra layer so this function is leaf and no SP adjustment on GOARM=7

// On earlier ARM revisions, armPublicationBarrier is a no-op.
// This will not work on SMP ARMv6 machines, if any are in use.
// To implement publicationBarrier in sys_$GOOS_arm.s using the native
// instructions, use:
//
//	TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
//		B	runtime·armPublicationBarrier(SB)
//
TEXT runtime·armPublicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	MOVB	runtime·goarm(SB), R11

	BL	runtime·load_g(SB)

	MOVW	R1, 8(R13)
	MOVW	R2, 12(R13)
	BL	runtime·sigtrampgo(SB)

	// Restore callee-save registers.
	ADD	$16, R13
	MOVM.IA.W (R13), [R4-R11]

	RET

TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	B	runtime·armPublicationBarrier(SB)

// TODO(jsing): OpenBSD only supports GOARM=7 machines... this
// should not be needed, however the linker still allows GOARM=5
// on this platform.

	BYTE $0x07; BYTE $0x00; // 2-byte nop
	BL	runtime·goexit1(SB)	// does not return
	// traceback from goexit1 must hit code range of goexit
	BYTE $0x07; BYTE $0x00; // 2-byte nop

TEXT ·publicationBarrier(SB),NOSPLIT|NOFRAME,$0-0
	// Stores are already ordered on s390x, so this is just a
	// compile barrier.
	RET

// This is called from .init_array and follows the platform, not Go, ABI.

	// the caller can make x observable to the garbage
	// collector. Otherwise, on weakly ordered machines,
	// the garbage collector could follow a pointer to x,
	// but see uninitialized memory or stale heap bits.
	publicationBarrier()
	// As x and the heap bits are initialized, update
	// freeIndexForScan now so x is seen by the GC
	// (including conservative scan) as an allocated object.
	// While this pointer can't escape into user code as a