p = c.cursym.Func().UnspillRegisterArgs(p, c.newprog)
	p = c.ctxt.EndUnsafePoint(p, c.newprog, -1)

	// JMP	start
	p = obj.Appendp(p, c.newprog)

	p.As = AJMP
	p.To.Type = obj.TYPE_BRANCH
	p.To.SetTarget(startPred.Link)
	startPred.Link.Mark |= LABEL
	p.Mark |= BRANCH

	// placeholder for q1's jump target
	p = obj.Appendp(p, c.newprog)

	p.As = obj.ANOP // zero-width place holder

	spfix := obj.Appendp(last, c.newprog)
	spfix.As = obj.ANOP
	spfix.Spadj = -framesize

	pcdata := c.ctxt.EmitEntryStackMap(c.cursym, spfix, c.newprog)
	pcdata = c.ctxt.StartUnsafePoint(pcdata, c.newprog)

	// MOVW	LR, R3
	movw := obj.Appendp(pcdata, c.newprog)
	movw.As = AMOVW
	movw.From.Type = obj.TYPE_REG
	movw.From.Reg = REGLINK
	movw.To.Type = obj.TYPE_REG
	movw.To.Reg = REG_R3

	bls.To.SetTarget(movw)

	q1 := p

	p.As = ABLT
	p.To.Type = obj.TYPE_BRANCH

	p = obj.Appendp(p, c.newprog)
	p.As = obj.ANOP // zero-width place holder

	if q != nil {
		q.To.SetTarget(p)
	}

	// Spill the register args that could be clobbered by the
	// morestack code.

	spill := c.cursym.Func().SpillRegisterArgs(p, c.newprog)

	// MOVD LR, R5
	p = obj.Appendp(spill, c.newprog)

	// SP data and PCDATA.
	spfix := obj.Appendp(p, c.newprog)
	spfix.As = obj.ANOP
	spfix.Spadj = -framesize

	pcdata := c.ctxt.EmitEntryStackMap(c.cursym, spfix, c.newprog)
	pcdata = c.ctxt.StartUnsafePoint(pcdata, c.newprog)

	// MOVD	LR, R5
	p = obj.Appendp(pcdata, c.newprog)
	pPre.To.SetTarget(p)
	p.As = AMOVD
	p.From.Type = obj.TYPE_REG
	p.From.Reg = REG_LR

func (ctxt *Link) EmitEntryLiveness(s *LSym, p *Prog, newprog ProgAlloc) *Prog {
	pcdata := ctxt.EmitEntryStackMap(s, p, newprog)
	pcdata = ctxt.EmitEntryUnsafePoint(s, pcdata, newprog)
	return pcdata
}

// Similar to EmitEntryLiveness, but just emit stack map.
func (ctxt *Link) EmitEntryStackMap(s *LSym, p *Prog, newprog ProgAlloc) *Prog {
	pcdata := Appendp(p, newprog)
	pcdata.Pos = s.Func().Text.Pos
	pcdata.As = APCDATA

package mips

import (
	"cmd/internal/obj"
	"cmd/internal/sys"
	"encoding/binary"
	"fmt"
	"internal/abi"
	"log"
	"math"
)

func progedit(ctxt *obj.Link, p *obj.Prog, newprog obj.ProgAlloc) {
	c := ctxt0{ctxt: ctxt, newprog: newprog}

	p.From.Class = 0
	p.To.Class = 0

	// Rewrite JMP/JAL to symbol as TYPE_BRANCH.
	switch p.As {
	case AJMP,
		AJAL,
		ARET,
		obj.ADUFFZERO,
		obj.ADUFFCOPY:

	spfix := obj.Appendp(last, c.newprog)
	spfix.As = obj.ANOP
	spfix.Spadj = -framesize

	pcdata := c.ctxt.EmitEntryStackMap(c.cursym, spfix, c.newprog)
	pcdata = c.ctxt.StartUnsafePoint(pcdata, c.newprog)

	if q != nil {
		q.To.SetTarget(pcdata)
	}
	bls.To.SetTarget(pcdata)

	spill := c.cursym.Func().SpillRegisterArgs(pcdata, c.newprog)

	// MOV	LR, R3
	movlr := obj.Appendp(spill, c.newprog)
	movlr.As = AMOVD

	spfix.As = obj.ANOP
	spfix.Spadj = -framesize

	pcdata := ctxt.EmitEntryStackMap(cursym, spfix, newprog)
	spill := ctxt.StartUnsafePoint(pcdata, newprog)
	pcdata = cursym.Func().SpillRegisterArgs(spill, newprog)

	call := obj.Appendp(pcdata, newprog)
	call.Pos = cursym.Func().Text.Pos
	call.As = obj.ACALL
	call.To.Type = obj.TYPE_BRANCH
	call.To.Name = obj.NAME_EXTERN

	p = ctxt.EndUnsafePoint(p, newprog, -1)
	p = cursym.Func().UnspillRegisterArgs(p, newprog)

	// JMP start
	p = obj.Appendp(p, newprog)
	p.As = AJAL
	p.To = obj.Addr{Type: obj.TYPE_BRANCH}
	p.From = obj.Addr{Type: obj.TYPE_REG, Reg: REG_ZERO}
	p.To.SetTarget(startPred.Link)

	// placeholder for to_done's jump target
	p = obj.Appendp(p, newprog)
	p.As = obj.ANOP // zero-width place holder

		}
		p.Forwd = nil
		dwn[i]--
		if dwn[i] <= 0 {
			dwn[i] = cnt[i]
			if lst[i] != nil {
				lst[i].Forwd = p
			}
			lst[i] = p
		}
	}
}

func Appendp(q *Prog, newprog ProgAlloc) *Prog {
	p := newprog()
	p.Link = q.Link
	q.Link = p
	p.Pos = q.Pos
	return p