}

//go:generate go run mkpreempt.go

// asyncPreempt saves all user registers and calls asyncPreempt2.
//
// When stack scanning encounters an asyncPreempt frame, it scans that
// frame and its parent frame conservatively.
//
// asyncPreempt is implemented in assembly.
func asyncPreempt()

//go:nosplit
func asyncPreempt2() {
	gp := getg()
	gp.asyncSafePoint = true
	if gp.preemptStop {

package objabi

import (
	"internal/abi"
	"strings"
)

var funcIDs = map[string]abi.FuncID{
	"abort":              abi.FuncID_abort,
	"asmcgocall":         abi.FuncID_asmcgocall,
	"asyncPreempt":       abi.FuncID_asyncPreempt,
	"cgocallback":        abi.FuncID_cgocallback,
	"corostart":          abi.FuncID_corostart,
	"debugCallV2":        abi.FuncID_debugCallV2,
	"gcBgMarkWorker":     abi.FuncID_gcBgMarkWorker,

// Code generated by mkpreempt.go; DO NOT EDIT.

#include "go_asm.h"
#include "textflag.h"

TEXT ·asyncPreempt(SB),NOSPLIT|NOFRAME,$0-0
	MOVW.W R14, -188(R13)
	MOVW R0, 4(R13)
	MOVW R1, 8(R13)
	MOVW R2, 12(R13)
	MOVW R3, 16(R13)
	MOVW R4, 20(R13)
	MOVW R5, 24(R13)
	MOVW R6, 28(R13)
	MOVW R7, 32(R13)
	MOVW R8, 36(R13)
	MOVW R9, 40(R13)
	MOVW R11, 44(R13)
	MOVW R12, 48(R13)
	MOVW CPSR, R0
	MOVW R0, 52(R13)

	// won't get to see who faulted.)
	// Also don't push a sigpanic frame if the faulting PC
	// is the entry of asyncPreempt. In this case, we suspended
	// the thread right between the fault and the exception handler
	// starting to run, and we have pushed an asyncPreempt call.
	// The exception is not from asyncPreempt, so not to push a
	// sigpanic call to make it look like that. Instead, just
	// overwrite the PC. (See issue #35773)

// Code generated by mkpreempt.go; DO NOT EDIT.

#include "go_asm.h"
#include "textflag.h"

TEXT ·asyncPreempt(SB),NOSPLIT|NOFRAME,$0-0
	MOV X1, -464(X2)
	SUB $464, X2
	MOV X5, 8(X2)
	MOV X6, 16(X2)
	MOV X7, 24(X2)
	MOV X8, 32(X2)
	MOV X9, 40(X2)
	MOV X10, 48(X2)
	MOV X11, 56(X2)
	MOV X12, 64(X2)
	MOV X13, 72(X2)
	MOV X14, 80(X2)
	MOV X15, 88(X2)
	MOV X16, 96(X2)
	MOV X17, 104(X2)
	MOV X18, 112(X2)

// Copyright 2019 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.

//go:build ignore

// mkpreempt generates the asyncPreempt functions for each
// architecture.
package main

import (
	"flag"
	"fmt"
	"io"
	"log"
	"os"
	"strings"
)

// Copied from cmd/compile/internal/ssa/gen/*Ops.go

var regNames386 = []string{
	"AX",

	gp := gFromSP(mp, c.sp())
	if gp != nil && wantAsyncPreempt(gp) {
		if ok, newpc := isAsyncSafePoint(gp, c.ip(), c.sp(), c.lr()); ok {
			// Inject call to asyncPreempt
			targetPC := abi.FuncPCABI0(asyncPreempt)
			switch GOARCH {
			default:
				throw("unsupported architecture")
			case "386", "amd64":
				// Make it look like the thread called targetPC.
				sp := c.sp()

	// preempt.
	if wantAsyncPreempt(gp) {
		if ok, newpc := isAsyncSafePoint(gp, ctxt.sigpc(), ctxt.sigsp(), ctxt.siglr()); ok {
			// Adjust the PC and inject a call to asyncPreempt.
			ctxt.pushCall(abi.FuncPCABI0(asyncPreempt), newpc)
		}
	}

	// Acknowledge the preemption.
	gp.m.preemptGen.Add(1)
	gp.m.signalPending.Store(0)

	if GOOS == "darwin" || GOOS == "ios" {

	"F15",
	"F16",
	"F17",
	"F18",
	"F19",
	"F20",
	"F21",
	"F22",
	"F23",
	"F24",
	"F25",
	"F26",
	"F27",
	"F28",
	"F29",
	"F30",
	"F31",

	// If you add registers, update asyncPreempt in runtime.

	// pseudo-registers
	"SB",
}

func init() {
	// Make map from reg names to reg integers.
	if len(regNamesLOONG64) > 64 {
		panic("too many registers")
	}

	"F23",
	"F24",
	"F25",
	"F26",
	"F27",
	"F28",
	"F29",
	"F30",
	// "F31", the allocator is limited to 64 entries. We sacrifice this FPR to support XER.

	"XER",

	// If you add registers, update asyncPreempt in runtime.

	// "CR0",
	// "CR1",
	// "CR2",
	// "CR3",
	// "CR4",
	// "CR5",
	// "CR6",
	// "CR7",

	// "CR",
	// "LR",
	// "CTR",
}

func init() {