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// Copyright 2016 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 s390x && linux
// +build s390x,linux
package unix
import (
"unsafe"
)
//sys EpollWait(epfd int, events []EpollEvent, msec int) (n int, err error)
//sys Fadvise(fd int, offset int64, length int64, advice int) (err error) = SYS_FADVISE64
//sys Fchown(fd int, uid int, gid int) (err error)
//sys Fstat(fd int, stat *Stat_t) (err error)
//sys Fstatat(dirfd int, path string, stat *Stat_t, flags int) (err error) = SYS_NEWFSTATAT
//sys Fstatfs(fd int, buf *Statfs_t) (err error)
//sys Ftruncate(fd int, length int64) (err error)
//sysnb Getegid() (egid int)
//sysnb Geteuid() (euid int)
//sysnb Getgid() (gid int)
//sysnb Getrlimit(resource int, rlim *Rlimit) (err error)
//sysnb Getuid() (uid int)
//sys Lchown(path string, uid int, gid int) (err error)
//sys Lstat(path string, stat *Stat_t) (err error)
//sys Pause() (err error)
//sys pread(fd int, p []byte, offset int64) (n int, err error) = SYS_PREAD64
//sys pwrite(fd int, p []byte, offset int64) (n int, err error) = SYS_PWRITE64
//sys Renameat(olddirfd int, oldpath string, newdirfd int, newpath string) (err error)
//sys Seek(fd int, offset int64, whence int) (off int64, err error) = SYS_LSEEK
//sys Select(nfd int, r *FdSet, w *FdSet, e *FdSet, timeout *Timeval) (n int, err error)
//sys sendfile(outfd int, infd int, offset *int64, count int) (written int, err error)
//sys setfsgid(gid int) (prev int, err error)
//sys setfsuid(uid int) (prev int, err error)
//sys Splice(rfd int, roff *int64, wfd int, woff *int64, len int, flags int) (n int64, err error)
//sys Stat(path string, stat *Stat_t) (err error)
//sys Statfs(path string, buf *Statfs_t) (err error)
//sys SyncFileRange(fd int, off int64, n int64, flags int) (err error)
//sys Truncate(path string, length int64) (err error)
//sys Ustat(dev int, ubuf *Ustat_t) (err error)
//sysnb getgroups(n int, list *_Gid_t) (nn int, err error)
//sysnb setgroups(n int, list *_Gid_t) (err error)
//sys futimesat(dirfd int, path string, times *[2]Timeval) (err error)
//sysnb Gettimeofday(tv *Timeval) (err error)
func Time(t *Time_t) (tt Time_t, err error) {
var tv Timeval
err = Gettimeofday(&tv)
if err != nil {
return 0, err
}
if t != nil {
*t = Time_t(tv.Sec)
}
return Time_t(tv.Sec), nil
}
//sys Utime(path string, buf *Utimbuf) (err error)
//sys utimes(path string, times *[2]Timeval) (err error)
func setTimespec(sec, nsec int64) Timespec {
return Timespec{Sec: sec, Nsec: nsec}
}
func setTimeval(sec, usec int64) Timeval {
return Timeval{Sec: sec, Usec: usec}
}
func Ioperm(from int, num int, on int) (err error) {
return ENOSYS
}
func Iopl(level int) (err error) {
return ENOSYS
}
func (r *PtraceRegs) PC() uint64 { return r.Psw.Addr }
func (r *PtraceRegs) SetPC(pc uint64) { r.Psw.Addr = pc }
func (iov *Iovec) SetLen(length int) {
iov.Len = uint64(length)
}
func (msghdr *Msghdr) SetControllen(length int) {
msghdr.Controllen = uint64(length)
}
func (msghdr *Msghdr) SetIovlen(length int) {
msghdr.Iovlen = uint64(length)
}
func (cmsg *Cmsghdr) SetLen(length int) {
cmsg.Len = uint64(length)
}
func (rsa *RawSockaddrNFCLLCP) SetServiceNameLen(length int) {
rsa.Service_name_len = uint64(length)
}
// Linux on s390x uses the old mmap interface, which requires arguments to be passed in a struct.
// mmap2 also requires arguments to be passed in a struct; it is currently not exposed in <asm/unistd.h>.
func mmap(addr uintptr, length uintptr, prot int, flags int, fd int, offset int64) (xaddr uintptr, err error) {
mmap_args := [6]uintptr{addr, length, uintptr(prot), uintptr(flags), uintptr(fd), uintptr(offset)}
r0, _, e1 := Syscall(SYS_MMAP, uintptr(unsafe.Pointer(&mmap_args[0])), 0, 0)
xaddr = uintptr(r0)
if e1 != 0 {
err = errnoErr(e1)
}
return
}
// On s390x Linux, all the socket calls go through an extra indirection.
// The arguments to the underlying system call (SYS_SOCKETCALL) are the
// number below and a pointer to an array of uintptr.
const (
// see linux/net.h
netSocket = 1
netBind = 2
netConnect = 3
netListen = 4
netAccept = 5
netGetSockName = 6
netGetPeerName = 7
netSocketPair = 8
netSend = 9
netRecv = 10
netSendTo = 11
netRecvFrom = 12
netShutdown = 13
netSetSockOpt = 14
netGetSockOpt = 15
netSendMsg = 16
netRecvMsg = 17
netAccept4 = 18
netRecvMMsg = 19
netSendMMsg = 20
)
func accept4(s int, rsa *RawSockaddrAny, addrlen *_Socklen, flags int) (int, error) {
args := [4]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen)), uintptr(flags)}
fd, _, err := Syscall(SYS_SOCKETCALL, netAccept4, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return 0, err
}
return int(fd), nil
}
func getsockname(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error {
args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
_, _, err := RawSyscall(SYS_SOCKETCALL, netGetSockName, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func getpeername(s int, rsa *RawSockaddrAny, addrlen *_Socklen) error {
args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(rsa)), uintptr(unsafe.Pointer(addrlen))}
_, _, err := RawSyscall(SYS_SOCKETCALL, netGetPeerName, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func socketpair(domain int, typ int, flags int, fd *[2]int32) error {
args := [4]uintptr{uintptr(domain), uintptr(typ), uintptr(flags), uintptr(unsafe.Pointer(fd))}
_, _, err := RawSyscall(SYS_SOCKETCALL, netSocketPair, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func bind(s int, addr unsafe.Pointer, addrlen _Socklen) error {
args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)}
_, _, err := Syscall(SYS_SOCKETCALL, netBind, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func connect(s int, addr unsafe.Pointer, addrlen _Socklen) error {
args := [3]uintptr{uintptr(s), uintptr(addr), uintptr(addrlen)}
_, _, err := Syscall(SYS_SOCKETCALL, netConnect, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func socket(domain int, typ int, proto int) (int, error) {
args := [3]uintptr{uintptr(domain), uintptr(typ), uintptr(proto)}
fd, _, err := RawSyscall(SYS_SOCKETCALL, netSocket, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return 0, err
}
return int(fd), nil
}
func getsockopt(s int, level int, name int, val unsafe.Pointer, vallen *_Socklen) error {
args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), uintptr(unsafe.Pointer(vallen))}
_, _, err := Syscall(SYS_SOCKETCALL, netGetSockOpt, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func setsockopt(s int, level int, name int, val unsafe.Pointer, vallen uintptr) error {
args := [5]uintptr{uintptr(s), uintptr(level), uintptr(name), uintptr(val), vallen}
_, _, err := Syscall(SYS_SOCKETCALL, netSetSockOpt, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func recvfrom(s int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (int, error) {
var base uintptr
if len(p) > 0 {
base = uintptr(unsafe.Pointer(&p[0]))
}
args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(unsafe.Pointer(from)), uintptr(unsafe.Pointer(fromlen))}
n, _, err := Syscall(SYS_SOCKETCALL, netRecvFrom, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return 0, err
}
return int(n), nil
}
func sendto(s int, p []byte, flags int, to unsafe.Pointer, addrlen _Socklen) error {
var base uintptr
if len(p) > 0 {
base = uintptr(unsafe.Pointer(&p[0]))
}
args := [6]uintptr{uintptr(s), base, uintptr(len(p)), uintptr(flags), uintptr(to), uintptr(addrlen)}
_, _, err := Syscall(SYS_SOCKETCALL, netSendTo, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func recvmsg(s int, msg *Msghdr, flags int) (int, error) {
args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)}
n, _, err := Syscall(SYS_SOCKETCALL, netRecvMsg, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return 0, err
}
return int(n), nil
}
func sendmsg(s int, msg *Msghdr, flags int) (int, error) {
args := [3]uintptr{uintptr(s), uintptr(unsafe.Pointer(msg)), uintptr(flags)}
n, _, err := Syscall(SYS_SOCKETCALL, netSendMsg, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return 0, err
}
return int(n), nil
}
func Listen(s int, n int) error {
args := [2]uintptr{uintptr(s), uintptr(n)}
_, _, err := Syscall(SYS_SOCKETCALL, netListen, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
func Shutdown(s, how int) error {
args := [2]uintptr{uintptr(s), uintptr(how)}
_, _, err := Syscall(SYS_SOCKETCALL, netShutdown, uintptr(unsafe.Pointer(&args)), 0)
if err != 0 {
return err
}
return nil
}
//sys kexecFileLoad(kernelFd int, initrdFd int, cmdlineLen int, cmdline string, flags int) (err error)
func KexecFileLoad(kernelFd int, initrdFd int, cmdline string, flags int) error {
cmdlineLen := len(cmdline)
if cmdlineLen > 0 {
// Account for the additional NULL byte added by
// BytePtrFromString in kexecFileLoad. The kexec_file_load
// syscall expects a NULL-terminated string.
cmdlineLen++
}
return kexecFileLoad(kernelFd, initrdFd, cmdlineLen, cmdline, flags)
}
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