//go:build linux && s390x && gc

#include "textflag.h"

//
// System calls for s390x, Linux
//

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

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

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

TEXT ·SyscallNoError(SB),NOSPLIT,$0-48
	BL	runtime·entersyscall(SB)
	MOVD	a1+8(FP), R2

func Fchdir(fd Handle) (err error)             { return syscall.EWINDOWS }
func Link(oldpath, newpath string) (err error) { return syscall.EWINDOWS }
func Symlink(path, link string) (err error)    { return syscall.EWINDOWS }

func Fchmod(fd Handle, mode uint32) (err error)        { return syscall.EWINDOWS }
func Chown(path string, uid int, gid int) (err error)  { return syscall.EWINDOWS }

// the manuals for the appropriate operating system.
//
// These calls return err == nil to indicate success; otherwise
// err represents an operating system error describing the failure and
// holds a value of type syscall.ErrorString.
package plan9 // import "golang.org/x/sys/plan9"

import (
	"bytes"
	"strings"
	"unsafe"
)

// ByteSliceFromString returns a NUL-terminated slice of bytes

// 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.
//
// Specifically, it tests a scenario where a thread 'steals'
// a P from itself. It's just a ProcStop with extra steps when
// it happens on the same P.

package main

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

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

//go:build darwin || dragonfly || freebsd || netbsd || openbsd

package route

import _ "unsafe" // for linkname

//go:linkname sysctl syscall.sysctl

	EvGoSysCall         = 28 // syscall enter [timestamp, stack]
	EvGoSysExit         = 29 // syscall exit [timestamp, goroutine id, seq, real timestamp]
	EvGoSysBlock        = 30 // syscall blocks [timestamp]
	EvGoWaiting         = 31 // denotes that goroutine is blocked when tracing starts [timestamp, goroutine id]
	EvGoInSyscall       = 32 // denotes that goroutine is in syscall when tracing starts [timestamp, goroutine id]

// 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.
//
// Specifically, it tests a scenerio wherein, without a
// P sequence number of GoSyscallBegin, the syscall that
// a ProcSteal applies to is ambiguous. This only happens in
// practice when the events aren't already properly ordered

	throw("runPerThreadSyscall only valid on linux")
}

//go:nosplit
func getuid() int32 {
	r, errno := syscall0(&libc_getuid)
	if errno != 0 {
		print("getuid failed ", errno)
		throw("getuid")
	}
	return int32(r)
}

//go:nosplit
func geteuid() int32 {
	r, errno := syscall0(&libc_geteuid)
	if errno != 0 {
		print("geteuid failed ", errno)
		throw("geteuid")
	}
	return int32(r)
}

func Fadvise(fd int, offset int64, length int64, advice int) (err error) {
	_, _, e1 := Syscall6(SYS_FADVISE64_64, uintptr(fd), uintptr(advice), uintptr(offset>>32), uintptr(offset), uintptr(length>>32), uintptr(length))
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func seek(fd int, offset int64, whence int) (int64, syscall.Errno) {
	var newoffset int64
	offsetLow := uint32(offset & 0xffffffff)

// 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). Because the actual
// m can be reused, it's possible for that m to have never
// had its P (in _Psyscall) stolen if the runtime doesn't