// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Tests a G being created from within a syscall.
//
// Specifically, it tests a scenerio wherein a C
// thread is calling into Go, creating a goroutine in
// a syscall (in the tracer's model). The system is free
// to reuse thread IDs, so first a thread ID is used to
// call into Go, and then is used for a Go-created thread.
//

// license that can be found in the LICENSE file.

#include "textflag.h"

// func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
TEXT ·Syscall6(SB),NOSPLIT,$0-80
	MOVD	num+0(FP), R1	// syscall entry
	MOVD	a1+8(FP), R2
	MOVD	a2+16(FP), R3
	MOVD	a3+24(FP), R4
	MOVD	a4+32(FP), R5
	MOVD	a5+40(FP), R6
	MOVD	a6+48(FP), R7
	SYSCALL
	MOVD	$0xfffffffffffff001, R8
	CMPUBLT	R2, R8, ok
	MOVD	$-1, r1+56(FP)

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package os

import (
	"syscall"
	"unsafe"
)

const _P_PID = 0

func wait6(idtype, id, options int) (status int, errno syscall.Errno) {
	var status32 int32 // C.int
	_, _, errno = syscall.Syscall6(syscall.SYS_WAIT6, uintptr(idtype), uintptr(id), uintptr(unsafe.Pointer(&status32)), uintptr(options), 0, 0)
	return int(status32), errno

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

#include "textflag.h"

// func Syscall6(num, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, errno uintptr)
//
// We need to convert to the syscall ABI.
//
// arg | ABIInternal | Syscall
// ---------------------------
// num | A0          | A7
// a1  | A1          | A0
// a2  | A2          | A1
// a3  | A3          | A2

package unix

import "syscall"

func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.Errno)
func Syscall6(trap, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err syscall.Errno)
func RawSyscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.Errno)

func syscall6(trap, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2 uintptr, err errno)

func callgetsystemcfg(label int) (r1 uintptr, e1 errno) {
	r1, _, e1 = syscall6(uintptr(unsafe.Pointer(&libc_getsystemcfg)), 1, uintptr(label), 0, 0, 0, 0, 0)
	return

// license that can be found in the LICENSE file.

package unix

import (
	"syscall"
	"unsafe"
)

// getentropy(2)'s syscall number, from /usr/src/sys/kern/syscalls.master
const entropyTrap uintptr = 7

// GetEntropy calls the OpenBSD getentropy system call.
func GetEntropy(p []byte) error {
	_, _, errno := syscall.Syscall(entropyTrap,
		uintptr(unsafe.Pointer(&p[0])),
		uintptr(len(p)),
		0)
	if errno != 0 {

//go:build freebsd && (amd64 || arm64 || riscv64)

package os

import (
	"syscall"
	"unsafe"
)

const _P_PID = 0

func wait6(idtype, id, options int) (status int, errno syscall.Errno) {
	var status32 int32 // C.int
	_, _, errno = syscall.Syscall6(syscall.SYS_WAIT6, uintptr(idtype), uintptr(id), uintptr(unsafe.Pointer(&status32)), uintptr(options), 0, 0)
	return int(status32), errno

//go:build dragonfly || freebsd || linux || netbsd || (openbsd && mips64)

package unix

import (
	"syscall"
	"unsafe"
)

func Unlinkat(dirfd int, path string, flags int) error {
	p, err := syscall.BytePtrFromString(path)
	if err != nil {
		return err
	}

	_, _, errno := syscall.Syscall(unlinkatTrap, uintptr(dirfd), uintptr(unsafe.Pointer(p)), uintptr(flags))
	if errno != 0 {
		return errno
	}

func TestPlan9Syserr(t *testing.T) {
	testalias(t,
		"Syscall",
		func() error {
			return syscall.Mkdir("/", 0)
		},
		func() error {
			return syscall.Mkdir("#", 0)
		})
	testalias(t,
		"Syscall6",
		func() error {
			return syscall.Mount(0, 0, "", 0, "")
		},
		func() error {
			return syscall.Mount(-1, 0, "", 0, "")
		})
	// originally failed only on plan9_arm
	testalias(t,