g0.stack.lo = 0
	g0.stackguard0 = g0.stack.lo + stackGuard
	g0.stackguard1 = g0.stackguard0

	print("Exception ", hex(info.exceptioncode), " ", hex(info.exceptioninformation[0]), " ", hex(info.exceptioninformation[1]), " ", hex(r.ip()), "\n")

	print("PC=", hex(r.ip()), "\n")
	if g0.m.incgo && gp == g0.m.g0 && g0.m.curg != nil {
		if iscgo {

#include "go_asm.h"
#include "go_tls.h"
#include "funcdata.h"
#include "textflag.h"

TEXT runtime·rt0_go(SB), NOSPLIT|NOFRAME|TOPFRAME, $0
	// save m->g0 = g0
	MOVD $runtime·g0(SB), runtime·m0+m_g0(SB)
	// save m0 to g0->m
	MOVD $runtime·m0(SB), runtime·g0+g_m(SB)
	// set g to g0
	MOVD $runtime·g0(SB), g
	CALLNORESUME runtime·check(SB)
#ifdef GOOS_js
	CALLNORESUME runtime·args(SB)
#endif
	CALLNORESUME runtime·osinit(SB)

		// that is always passing a new M from needm.

		// Stack is bogus, but reset the bounds anyway so we can print.
		hi := g0.stack.hi
		lo := g0.stack.lo
		g0.stack.hi = sp + 1024
		g0.stack.lo = sp - 32*1024
		g0.stackguard0 = g0.stack.lo + stackGuard
		g0.stackguard1 = g0.stackguard0

		print("M ", mp.id, " procid ", mp.procid, " runtime: cgocallback with sp=", hex(sp), " out of bounds [", hex(lo), ", ", hex(hi), "]")

	gp := getg()
	if gp != gp.m.g0 {
		throw("notetsleep not on g0")
	}
	semacreate(gp.m)
	return notetsleep_internal(n, ns, nil, 0)
}

// same as runtime·notetsleep, but called on user g (not g0)
// calls only nosplit functions between entersyscallblock/exitsyscall.
func notetsleepg(n *note, ns int64) bool {
	gp := getg()
	if gp == gp.m.g0 {
		throw("notetsleepg on g0")
	}
	semacreate(gp.m)

	}
	if go1Dot5Fields {
		g0.Disposal = make([]byte, len(g0.Image))
		for i := range g0.Disposal {
			g0.Disposal[i] = DisposalNone
		}
		g0.Config = image.Config{
			ColorModel: globalColorModel,
			Width:      width,
			Height:     height,
		}
		g0.BackgroundIndex = backgroundIndex
	}

	var buf bytes.Buffer
	if err := EncodeAll(&buf, g0); err != nil {
		t.Fatal("EncodeAll:", err)
	}

	JMP	asancall<>(SB)

// Switches SP to g0 stack and calls (AX). Arguments already set.
TEXT	asancall<>(SB), NOSPLIT, $0-0
	get_tls(R12)
	MOVQ	g(R12), R14
	MOVQ	SP, R12		// callee-saved, preserved across the CALL
	CMPQ	R14, $0
	JE	call	// no g; still on a system stack

	MOVQ	g_m(R14), R13
	// Switch to g0 stack.
	MOVQ	m_g0(R13), R10
	CMPQ	R10, R14
	JE	call	// already on g0

	MOVQ	(g_sched+gobuf_sp)(R10), SP
call:

	gp := getg()
	if gp != gp.m.g0 && gp.m.preemptoff != "" {
		throw("notetsleep not on g0")
	}

	return notetsleep_internal(n, ns)
}

// same as runtime·notetsleep, but called on user g (not g0)
// calls only nosplit functions between entersyscallblock/exitsyscall.
func notetsleepg(n *note, ns int64) bool {
	gp := getg()
	if gp == gp.m.g0 {
		throw("notetsleepg on g0")
	}

	entersyscallblock()

	MOVV	g, R2

	// Figure out if we need to switch to m->g0 stack.
	// We get called to create new OS threads too, and those
	// come in on the m->g0 stack already. Or we might already
	// be on the m->gsignal stack.
	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)

	MOV	g, X9

	// Figure out if we need to switch to m->g0 stack.
	// We get called to create new OS threads too, and those
	// come in on the m->g0 stack already. Or we might already
	// be on the m->gsignal stack.
	MOV	g_m(g), X6
	MOV	m_gsignal(X6), X7
	BEQ	X7, g, g0
	MOV	m_g0(X6), X7
	BEQ	X7, g, g0

	CALL	gosave_systemstack_switch<>(SB)
	MOV	X7, g
	CALL	runtime·save_g(SB)

	MOVD	g, R5

	// Figure out if we need to switch to m->g0 stack.
	// We get called to create new OS threads too, and those
	// come in on the m->g0 stack already. Or we might already
	// be on the m->gsignal stack.
	MOVD	g_m(g), R6
	MOVD	m_gsignal(R6), R7
	CMPBEQ	R7, g, g0
	MOVD	m_g0(R6), R7
	CMPBEQ	R7, g, g0
	BL	gosave_systemstack_switch<>(SB)
	MOVD	R7, g
	BL	runtime·save_g(SB)