print("r24  ", hex(c.r24()), "\t")
	print("r25  ", hex(c.r25()), "\n")
	print("r26  ", hex(c.r26()), "\t")
	print("r27  ", hex(c.r27()), "\n")
	print("r28  ", hex(c.r28()), "\t")
	print("r29  ", hex(c.r29()), "\n")
	print("r30  ", hex(c.r30()), "\t")
	print("r31  ", hex(c.r31()), "\n")
	print("pc   ", hex(c.pc()), "\t")
	print("ctr  ", hex(c.ctr()), "\n")
	print("link ", hex(c.link()), "\t")

	MOVV R18, 120(R3)
	MOVV R19, 128(R3)
	MOVV R20, 136(R3)
	MOVV R21, 144(R3)
	MOVV R23, 152(R3)
	MOVV R24, 160(R3)
	MOVV R25, 168(R3)
	MOVV R26, 176(R3)
	MOVV R27, 184(R3)
	MOVV R28, 192(R3)
	MOVV R29, 200(R3)
	MOVV R31, 208(R3)
	MOVD F0, 216(R3)
	MOVD F1, 224(R3)
	MOVD F2, 232(R3)
	MOVD F3, 240(R3)
	MOVD F4, 248(R3)
	MOVD F5, 256(R3)
	MOVD F6, 264(R3)
	MOVD F7, 272(R3)
	MOVD F8, 280(R3)

// of ((offset)+0*8)(RSP) ~ ((offset)+9*8)(RSP).
//
// SAVE_F8_TO_F15(offset) saves F8 ~ F15 to the stack space
// of ((offset)+0*8)(RSP) ~ ((offset)+7*8)(RSP).
//
// R29 is not saved because Go will save and restore it.

#define SAVE_R19_TO_R28(offset) \
	STP	(R19, R20), ((offset)+0*8)(RSP) \
	STP	(R21, R22), ((offset)+2*8)(RSP) \
	STP	(R23, R24), ((offset)+4*8)(RSP) \

	MOVD	(g_sched+gobuf_sp)(g), R3
	MOVD	R3, RSP
	MOVD	(g_sched+gobuf_bp)(g), R29

	// call target function
	MOVD	0(R26), R3	// code pointer
	BL	(R3)

	// switch back to g
	MOVD	g_m(g), R3
	MOVD	m_curg(R3), g
	BL	runtime·save_g(SB)
	MOVD	(g_sched+gobuf_sp)(g), R0
	MOVD	R0, RSP
	MOVD	(g_sched+gobuf_bp)(g), R29
	MOVD	$0, (g_sched+gobuf_sp)(g)
	MOVD	$0, (g_sched+gobuf_bp)(g)
	RET

TEXT crosscall2(SB),NOSPLIT|NOFRAME,$0
	/*
	 * We still need to save all callee save register as before, and then
	 * push 3 args for fn (R4, R5, R7), skipping R6.
	 * Also note that at procedure entry in gc world, 8(R29) will be the
	 *  first arg.
	 */

	ADDV	$(-23*8), R3
	MOVV	R4, (1*8)(R3) // fn unsafe.Pointer
	MOVV	R5, (2*8)(R3) // a unsafe.Pointer
	MOVV	R7, (3*8)(R3) // ctxt uintptr

	SAVE_R22_TO_R31((4*8))

		// but clobbers R1 (LR) because it's a call
		// and R30 (REGTMP).
		// Returns a pointer to a write barrier buffer in R29.
		{name: "LoweredWB", argLength: 1, reg: regInfo{clobbers: (callerSave &^ gpg) | buildReg("R1"), outputs: []regMask{buildReg("R29")}}, clobberFlags: true, aux: "Int64"},

		// There are three of these functions so that they can have three different register inputs.

	MOVD	R23, (offset+8*9)(R1)  \
	MOVD	R24, (offset+8*10)(R1) \
	MOVD	R25, (offset+8*11)(R1) \
	MOVD	R26, (offset+8*12)(R1) \
	MOVD	R27, (offset+8*13)(R1) \
	MOVD	R28, (offset+8*14)(R1) \
	MOVD	R29, (offset+8*15)(R1) \
	MOVD	g,   (offset+8*16)(R1) \
	MOVD	R31, (offset+8*17)(R1)

#define RESTORE_GPR(offset)            \
	MOVD	(offset+8*0)(R1), R14  \
	MOVD	(offset+8*1)(R1), R15  \
	MOVD	(offset+8*2)(R1), R16  \

	// To defeat the linker, we make our own stack frame with
	// more space.
	SUB	$144+FIXED_FRAME, R1

	// Save registers
	MOVD	R31, 56(R1)
	MOVD	g, 64(R1)
	MOVD	R29, 72(R1)
	MOVD	R14, 80(R1)
	MOVD	R15, 88(R1)

	BL	runtime·load_g(SB)

	CMP	$0, g
	BEQ	sigtramp // g == nil
	MOVD	g_m(g), R6
	CMP	$0, R6
	BEQ	sigtramp	// g.m == nil

// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#include "textflag.h"
#include "funcdata.h"

#define	REGCTXT	R29

// The frames of each of the two functions below contain two locals, at offsets
// that are known to the runtime.
//
// The first local is a bool called retValid with a whole pointer-word reserved

func (c *sigctxt) r26() uint64 { return c.regs().sc_regs[26] }
func (c *sigctxt) r27() uint64 { return c.regs().sc_regs[27] }
func (c *sigctxt) r28() uint64 { return c.regs().sc_regs[28] }
func (c *sigctxt) r29() uint64 { return c.regs().sc_regs[29] }
func (c *sigctxt) r30() uint64 { return c.regs().sc_regs[30] }
func (c *sigctxt) r31() uint64 { return c.regs().sc_regs[31] }
func (c *sigctxt) sp() uint64  { return c.regs().sc_regs[3] }