//  v5.1: pidfd_send_signal syscall;
//  v5.2: CLONE_PIDFD flag for clone syscall;
//  v5.3: pidfd_open syscall, clone3 syscall;
//  v5.4: P_PIDFD idtype support for waitid syscall;
//  v5.6: pidfd_getfd syscall.

package os

import (
	"errors"
	"internal/syscall/unix"
	"sync"
	"syscall"
	"unsafe"
)

func ensurePidfd(sysAttr *syscall.SysProcAttr) *syscall.SysProcAttr {
	if !pidfdWorks() {

// Copyright 2023 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.

// Tests syscall P stealing from a goroutine and thread
// that have been in a syscall the entire generation.

package main

import (
	"internal/trace"
	"internal/trace/event/go122"
	testgen "internal/trace/internal/testgen/go122"
)

func main() {
	testgen.Main(gen)
}

	modiphlpapi         = syscall.NewLazyDLL(sysdll.Add("iphlpapi.dll"))
	modkernel32         = syscall.NewLazyDLL(sysdll.Add("kernel32.dll"))
	modnetapi32         = syscall.NewLazyDLL(sysdll.Add("netapi32.dll"))
	modntdll            = syscall.NewLazyDLL(sysdll.Add("ntdll.dll"))
	modpsapi            = syscall.NewLazyDLL(sysdll.Add("psapi.dll"))
	moduserenv          = syscall.NewLazyDLL(sysdll.Add("userenv.dll"))

// Implemented in ../runtime/syscall_windows.go.

// Deprecated: Use [SyscallN] instead.
func Syscall(trap, nargs, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)

// Deprecated: Use [SyscallN] instead.
func Syscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)

// Deprecated: Use [SyscallN] instead.
func Syscall9(trap, nargs, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2 uintptr, err Errno)

	MOVW	(R3), R3
	MOVD	R3, (6*8)(R14)		// err

ok:
	RET

// syscallX calls a function in libc on behalf of the syscall package.
// syscallX takes a pointer to a struct like:
// struct {
//	fn    uintptr
//	a1    uintptr
//	a2    uintptr
//	a3    uintptr
//	r1    uintptr
//	r2    uintptr
//	err   uintptr
// }
// syscallX must be called on the g0 stack with the
// C calling convention (use libcCall).

//go:build linux && (mips || mipsle)

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

//
// System calls for mips, Linux
//

// func Syscall9(trap trap, a1, a2, a3, a4, a5, a6, a7, a8, a9 uintptr) (r1, r2, err uintptr);
// Actually Syscall8 but the rest of the code expects it to be named Syscall9.
TEXT ·Syscall9(SB),NOSPLIT,$28-52
	NO_LOCAL_POINTERS
	JAL	runtime·entersyscall(SB)
	MOVW	a1+4(FP), R4
	MOVW	a2+8(FP), R5
	MOVW	a3+12(FP), R6

// Provide these function names via assembly so they are provided as ABI0,
// rather than ABIInternal.

// func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err Errno)
TEXT	·Syscall(SB),NOSPLIT,$0-56
	JMP	·syscallInternal(SB)

// func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err Errno)
TEXT	·Syscall6(SB),NOSPLIT,$0-80
	JMP	·syscall6Internal(SB)

	mktypes="GOARCH=$GOARCH go tool cgo -godefs"
	;;
freebsd_arm)
	mkerrors="$mkerrors"
	mksyscall="go run mksyscall.go -l32 -arm"
	mksysnum="go run mksysnum.go 'https://cgit.freebsd.org/src/plain/sys/kern/syscalls.master?h=stable/12'"
	# Let the type of C char be signed for making the bare syscall
	# API consistent across platforms.

#include "textflag.h"

// System call support for 386 BSD

// Just jump to package syscall's implementation for all these functions.
// The runtime may know about them.

TEXT	·Syscall(SB),NOSPLIT,$0-28
	JMP	syscall·Syscall(SB)

TEXT	·Syscall6(SB),NOSPLIT,$0-40
	JMP	syscall·Syscall6(SB)

TEXT	·Syscall9(SB),NOSPLIT,$0-52
	JMP	syscall·Syscall9(SB)

TEXT	·RawSyscall(SB),NOSPLIT,$0-28

#include "textflag.h"

// System call support for ARM64 BSD

// Just jump to package syscall's implementation for all these functions.
// The runtime may know about them.

TEXT	·Syscall(SB),NOSPLIT,$0-56
	JMP	syscall·Syscall(SB)

TEXT	·Syscall6(SB),NOSPLIT,$0-80
	JMP	syscall·Syscall6(SB)

TEXT	·Syscall9(SB),NOSPLIT,$0-104
	JMP	syscall·Syscall9(SB)

TEXT	·RawSyscall(SB),NOSPLIT,$0-56