func (k *PosixKernel) Sendto(fd co.Fd, buf co.Buf, size co.Len, flags int, sa syscall.Sockaddr, socklen co.Len) uint64 {
msg := make([]byte, size)
if err := buf.Unpack(msg); err != nil {
return UINT64_MAX // FIXME
}
return Errno(syscall.Sendto(int(fd), msg, flags, sa))
}
func Pack(buf co.Buf, i interface{}) error {
switch v := i.(type) {
case *syscall.Statfs_t:
return buf.Pack(native.StatfsToLinux(v))
default:
return argjoy.NoMatch
}
}
func (k *PosixKernel) Write(fd co.Fd, buf co.Buf, size co.Len) uint64 {
tmp := make([]byte, size)
if err := buf.Unpack(tmp); err != nil {
return UINT64_MAX // FIXME
}
n, err := syscall.Write(int(fd), tmp)
if err != nil {
return Errno(err)
}
return uint64(n)
}
func (k *PosixKernel) Lstat(path string, buf co.Buf) uint64 {
var stat syscall.Stat_t
if err := syscall.Lstat(path, &stat); err != nil {
return Errno(err)
}
targetStat := NewTargetStat(&stat, k.U.OS(), k.U.Bits())
if err := buf.Pack(targetStat); err != nil {
panic(err)
}
return 0
}
func (k *PosixKernel) Fstat(fd co.Fd, buf co.Buf) uint64 {
var stat syscall.Stat_t
if err := syscall.Fstat(int(fd), &stat); err != nil {
return Errno(err)
}
targetStat := NewTargetStat(&stat, k.U.OS(), k.U.Bits())
if err := buf.Pack(targetStat); err != nil {
panic(err)
}
return 0
}
func (k *PosixKernel) Getcwd(buf co.Buf, size co.Len) uint64 {
wd, _ := os.Getwd()
size -= 1
if co.Len(len(wd)) > size {
wd = wd[:size]
}
if err := buf.Pack(wd + "\x00"); err != nil {
return UINT64_MAX // FIXME
}
return 0
}
func (k *PosixKernel) Pwrite64(fd co.Fd, buf co.Buf, size co.Len, offset int64) uint64 {
p := make([]byte, size)
if err := buf.Unpack(p); err != nil {
return UINT64_MAX // FIXME
}
n, err := syscall.Pwrite(int(fd), p, offset)
if err != nil {
return Errno(err)
}
return uint64(n)
}
func (k *MachKernel) MachVmAllocate(unk int, size co.Len, addrOut co.Buf) uint64 {
mmap, err := k.U.Mmap(0, uint64(size))
if err != nil {
return posix.UINT64_MAX // FIXME
}
var tmp [8]byte
buf, _ := k.U.PackAddr(tmp[:], mmap.Addr)
if err := addrOut.Pack(buf); err != nil {
return posix.UINT64_MAX // FIXME
}
return 0
}
func (k *PosixKernel) Recvfrom(fd co.Fd, buf co.Buf, size co.Len, flags int, from co.Buf, fromlen co.Len) uint64 {
p := make([]byte, size)
if n, _, err := syscall.Recvfrom(int(fd), p, flags); err != nil {
// TODO: need kernel.Pack() so we can pack a sockaddr into from
if err := buf.Pack(p); err != nil {
return UINT64_MAX // FIXME
}
return uint64(n)
} else {
return UINT64_MAX // FIXME
}
}
func (k *PosixKernel) Setsockopt(fd co.Fd, level, opt int, valueIn co.Buf, size int) uint64 {
// TODO: dispatch/support all setsockopt types
if size != 4 {
fmt.Fprintf(os.Stderr, "WARNING: unsupported Setsockopt type %d\n", size)
return UINT64_MAX // FIXME
}
var value int32
if err := valueIn.Unpack(&value); err != nil {
return UINT64_MAX // FIXME
}
if err := syscall.SetsockoptInt(int(fd), level, opt, opt); err != nil {
return Errno(err)
}
return 0
}
func (k *PosixKernel) Pipe(files co.Buf) uint64 {
var fds [2]int
err := syscall.Pipe(fds[:])
if err == nil {
st := files.Struc()
err := st.Pack(int32(fds[0]))
if err == nil {
err = st.Pack(int32(fds[1]))
}
if err != nil {
return UINT64_MAX // FIXME
}
}
return Errno(err)
}
func (k *PosixKernel) Stat(path string, buf co.Buf) uint64 {
// TODO: centralize path hook
if strings.Contains(path, "/lib/") {
path = k.U.PrefixPath(path, false)
}
var stat syscall.Stat_t
if err := syscall.Stat(path, &stat); err != nil {
return Errno(err)
}
targetStat := NewTargetStat(&stat, k.U.OS(), k.U.Bits())
if err := buf.Pack(targetStat); err != nil {
panic(err)
}
return 0
}
func (k *LinuxKernel) Socketcall(index int, params co.Buf) uint64 {
if name, ok := socketCallMap[index]; ok {
if sys := co.Lookup(k.U, k, name); sys != nil {
rawArgs := make([]uint32, len(sys.In))
if err := params.Unpack(rawArgs); err != nil {
return posix.UINT64_MAX
}
args := make([]uint64, len(rawArgs))
for i, v := range rawArgs {
args[i] = uint64(v)
}
return sys.Call(args)
}
}
return posix.UINT64_MAX // FIXME
}
func (k *PosixKernel) Getsockopt(fd co.Fd, level, opt int, valueOut, valueSizeOut co.Buf) uint64 {
// TODO: dispatch/support both addr and int types
value, err := syscall.GetsockoptInt(int(fd), level, opt)
if err != nil {
return Errno(err)
}
value32 := int32(value)
size := int32(4)
if err := valueOut.Pack(value32); err != nil {
return UINT64_MAX // FIXME
}
if err := valueSizeOut.Pack(size); err != nil {
return UINT64_MAX // FIXME
}
return 0
}
func (k *LinuxKernel) Sendfile(out, in co.Fd, off co.Buf, count uint64) uint64 {
// TODO: the in_fd argument must correspond to a file which supports mmap(2)-like operations (i.e., it cannot be a socket).
outFile := out.File()
inFile := in.File()
var offset struc.Off_t
if off.Addr != 0 {
if err := off.Unpack(&offset); err != nil {
return UINT64_MAX // FIXME
}
}
written, err := io.CopyN(outFile, inFile, int64(count))
// TODO: is EOF handling correct here?
if (err != nil && err != io.EOF) || written < 0 {
return UINT64_MAX // FIXME
}
return uint64(written)
}
func iovecIter(stream co.Buf, count uint64, bits uint) <-chan Iovec64 {
ret := make(chan Iovec64)
go func() {
for i := uint64(0); i < count; i++ {
if bits == 64 {
var iovec Iovec64
stream.Unpack(&iovec)
ret <- iovec
} else {
var iv32 Iovec32
stream.Unpack(&iv32)
ret <- Iovec64{uint64(iv32.Base), uint64(iv32.Len)}
}
}
close(ret)
}()
return ret
}
func (k *PosixKernel) Getgroups(count int, buf co.Buf) uint64 {
groups, err := syscall.Getgroups()
if err != nil {
return Errno(err)
}
length := uint64(len(groups))
if count > 0 {
if count < len(groups) {
groups = groups[:count]
}
tmp := make([]uint32, len(groups))
for i, v := range groups {
tmp[i] = uint32(v)
}
if err := buf.Pack(tmp); err != nil {
return UINT64_MAX // FIXME
}
}
return length
}
func (k *PosixKernel) Readlink(path string, buf co.Buf, size co.Len) uint64 {
// TODO: full proc emulation layer
// maybe have a syscall pre-hook for this after ghostrace makes it generic
// or specifically have path hooks and use that to implement prefix as well
var name string
var err error
if path == "/proc/self/exe" && k.U.OS() == "linux" {
name = k.U.Exe()
} else {
name, err = os.Readlink(path)
if err != nil {
return UINT64_MAX // FIXME
}
}
if len(name) > int(size)-1 {
name = name[:size-1]
}
if err := buf.Pack([]byte(name + "\x00")); err != nil {
return UINT64_MAX // FIXME
}
return uint64(len(name))
}
func Sockaddr(buf common.Buf, length int) syscall.Sockaddr {
var port [2]byte
order := buf.K.U.ByteOrder()
// TODO: handle insufficient length
var family uint16
if err := buf.Unpack(&family); err != nil {
return nil
}
// TODO: handle errors?
st := buf.Struc()
switch family {
case AF_LOCAL:
var a SockaddrUnix
st.Unpack(&a)
return sockaddrToNative(&a)
case AF_INET:
var a SockaddrInet4
st.Unpack(&a)
order.PutUint16(port[:], a.Port)
a.Port = binary.BigEndian.Uint16(port[:])
return sockaddrToNative(&a)
case AF_INET6:
var a SockaddrInet6
st.Unpack(&a)
order.PutUint16(port[:], a.Port)
a.Port = binary.BigEndian.Uint16(port[:])
return sockaddrToNative(&a)
case AF_PACKET:
var a SockaddrLinklayer
st.Unpack(&a)
return sockaddrToNative(&a)
case AF_NETLINK:
var a SockaddrNetlink
st.Unpack(&a)
return sockaddrToNative(&a)
}
return nil
}
func (k *CgcKernel) Fdwait(nfds int, reads, writes, timeoutBuf co.Buf, readyFds co.Obuf) int {
var readSet, writeSet *native.Fdset32
var timeout native.Timespec
reads.Unpack(&readSet)
writes.Unpack(&writeSet)
timeoutBuf.Unpack(&timeout)
readNative := readSet.Native()
writeNative := writeSet.Native()
n, err := native.Select(nfds, readNative, writeNative, &timeout)
if err != nil {
return -1 // FIXME?
} else {
readyFds.Pack(int32(n))
}
return 0
}
func Uname(buf co.Buf, un *models.Uname) {
buf.Pack(un)
}
func Sockaddr(buf common.Buf, length int) syscall.Sockaddr {
var port [2]byte
order := buf.U.ByteOrder()
// TODO: handle insufficient length
var family uint16
buf.Unpack(&family)
buf = buf.Copy()
switch family {
case AF_LOCAL:
var a SockaddrUnix
buf.Unpack(&a)
return sockaddrToNative(&a)
case AF_INET:
var a SockaddrInet4
buf.Unpack(&a)
order.PutUint16(port[:], a.Port)
a.Port = binary.BigEndian.Uint16(port[:])
return sockaddrToNative(&a)
case AF_INET6:
var a SockaddrInet6
buf.Unpack(&a)
order.PutUint16(port[:], a.Port)
a.Port = binary.BigEndian.Uint16(port[:])
return sockaddrToNative(&a)
case AF_PACKET:
var a SockaddrLinklayer
buf.Unpack(&a)
return sockaddrToNative(&a)
case AF_NETLINK:
var a SockaddrNetlink
buf.Unpack(&a)
return sockaddrToNative(&a)
}
return nil
}
