MOVD	savedm-8(SP), R6
	CMP	R6, $0
	BNE	droppedm

	// Skip dropm to reuse it in the next call, when a pthread key has been created.
	MOVD	_cgo_pthread_key_created(SB), R6
	// It means cgo is disabled when _cgo_pthread_key_created is a nil pointer, need dropm.
	CMP	R6, $0
	BEQ	dropm
	MOVD	(R6), R6
	CMP	R6, $0
	BNE	droppedm

dropm:
	MOVD	$runtime·dropm(SB), R12

	SUBSW R2.SXTH<<3, R13, R6                  // a6ad226b
	SUBS R21.UXTX<<2, R27, R4                  // 646b35eb
	SUBSW $(44<<12), R6, R9                    // SUBSW $180224, R6, R9         // c9b04071
	SUBS $(1804<<12), R13, R9                  // SUBS $7389184, R13, R9        // a9315cf1
	SUBSW R22->28, R6, R7                      // c770966b
	SUBSW R22>>28, R6, R7                      // c770566b

	MOVV	n+8(FP), R5		// arg 2 - len
	MOVW	flags+16(FP), R6	// arg 2 - flags
	MOVV	$75, R2			// sys_madvise
	SYSCALL
	BEQ	R7, 2(PC)
	MOVW	$-1, R2
	MOVW	R2, ret+24(FP)
	RET

TEXT runtime·setitimer(SB),NOSPLIT,$0
	MOVW	mode+0(FP), R4		// arg 1 - mode
	MOVV	new+8(FP), R5		// arg 2 - new value
	MOVV	old+16(FP), R6		// arg 3 - old value
	MOVV	$69, R2			// sys_setitimer
	SYSCALL
	RET

//

// func rawVforkSyscall(trap, a1, a2, a3 uintptr) (r1, err uintptr)
TEXT ·rawVforkSyscall(SB),NOSPLIT|NOFRAME,$0-48
	MOVD	a1+8(FP), R2
	MOVD	a2+16(FP), R3
	MOVD	a3+24(FP), R4
	MOVD	$0, R5
	MOVD	$0, R6
	MOVD	$0, R7
	MOVD	trap+0(FP), R1	// syscall entry
	SYSCALL
	MOVD	$0xfffffffffffff001, R8
	CMPUBLT	R2, R8, ok2
	MOVD	$-1, r1+32(FP)
	NEG	R2, R2
	MOVD	R2, err+40(FP)	// errno
	RET
ok2:
	MOVD	R2, r1+32(FP)

	MOVD	0(R3), R3		// arg 1 - attr
	CALL	libc_pthread_attr_setdetachstate(SB)
	RET

TEXT runtime·pthread_create_trampoline(SB),NOSPLIT,$32
	MOVD	0(R3), R4		// arg 2 - attr
	MOVD	8(R3), R5		// arg 3 - start
	MOVD	16(R3), R6		// arg 4 - arg

	MOVD	R1, R15
	SUB	$64, R1
	RLDCR	$0, R1, $~15, R1
	MOVD	R1, R3			// arg 1 - &threadid (discard)
	CALL	libc_pthread_create(SB)
	MOVD	R15, R1

	RET

	MOVD	fn+0(FP), R0        // function code (encryption)
	MOVD	key_base+8(FP), R1  // key
	MOVD	buf_base+80(FP), R2 // counter values
	MOVD	dst_base+32(FP), R4 // dst
	MOVD	src_base+56(FP), R6 // src
	MOVD	src_len+64(FP), R7  // len
loop:
	KMCTR	R4, R2, R6          // cipher message with counter (KMCTR)
	BVS	loop                // branch back if interrupted
	RET
crash:
	MOVD	$0, (R0)
	RET

	// We get called to create new OS threads too, and those
	// come in on the m->g0 stack already.
	MOVV	g_m(g), R5
	MOVV	m_gsignal(R5), R6
	BEQ	R6, g, g0
	MOVV	m_g0(R5), R6
	BEQ	R6, g, g0

	JAL	gosave_systemstack_switch<>(SB)
	MOVV	R6, g
	JAL	runtime·save_g(SB)
	MOVV	(g_sched+gobuf_sp)(g), R3

	// Now on a scheduling stack (a pthread-created stack).
g0:

// It's such a pointer chain: _crosscall2_ptr -> x_crosscall2_ptr -> crosscall2
TEXT ·set_crosscall2(SB),NOSPLIT,$0-0
	MOVD	_crosscall2_ptr(SB), R5
	MOVD	CROSSCALL2_FPTR, R6
	MOVD	R6, (R5)
	RET

TEXT crosscall2_trampoline<>(SB),NOSPLIT,$0-0
	JMP	crosscall2(SB)

// Called by C code generated by cmd/cgo.
// func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr)

// Use a local trampoline, to avoid taking the address of a dynamically exported
// function.
TEXT ·set_crosscall2(SB),NOSPLIT,$0-0
	MOVV	_crosscall2_ptr(SB), R5
	MOVV	$crosscall2_trampoline<>(SB), R6
	MOVV	R6, (R5)
	RET

TEXT crosscall2_trampoline<>(SB),NOSPLIT,$0-0
	JMP	crosscall2(SB)

// Called by C code generated by cmd/cgo.
// func crosscall2(fn, a unsafe.Pointer, n int32, ctxt uintptr)

	{"R2", "R2"},
	{"R3", "R3"},
	{"R4", "R4"},
	{"R(4)", "R4"},
	{"R5", "R5"},
	{"R6", "R6"},
	{"R7", "R7"},
	{"R8", "R8"},
	{"[R0,R1,g,R15]", "[R0,R1,g,R15]"},
	{"[R0-R7]", "[R0,R1,R2,R3,R4,R5,R6,R7]"},
	{"[R(0)-R(7)]", "[R0,R1,R2,R3,R4,R5,R6,R7]"},
	{"[R0]", "[R0]"},
	{"[R1-R12]", "[R1,R2,R3,R4,R5,R6,R7,R8,R9,g,R11,R12]"},
	{"armCAS64(SB)", "armCAS64(SB)"},
	{"asmcgocall<>(SB)", "asmcgocall<>(SB)"},