public override int GetHashCode()
{
return(_value.ToInt32());
}
public static int mmap2(Thread current, UserPtr addr, int length, int prot, int flags, int fd, int pgoffset)
{
Contract.Requires(current.Parent == current.Parent.Space.GhostOwner);
Pointer targetAddr = new Pointer(Arch.ArchDefinition.PageAlign(addr.Value.ToUInt32()));
//Arch.Console.Write("mmap2:");
//Arch.Console.Write(addr.Value.ToInt32());
//Arch.Console.Write(" sz=");
//Arch.Console.Write(length);
//Arch.Console.Write(" prot=");
//Arch.Console.Write(prot);
//Arch.Console.WriteLine();
var proc = current.Parent;
var space = proc.Space;
Contract.Assert(proc == space.GhostOwner);
if ((flags & MAP_FIXED) == 0)
{
if (targetAddr == Pointer.Zero || space.ContainRegion(targetAddr, length))
targetAddr = space.FindFreeRegion(length);
}
else if (Arch.ArchDefinition.PageOffset(addr.Value.ToInt32()) != 0)
{
return -ErrorCode.EINVAL;
}
targetAddr = new Pointer(Arch.ArchDefinition.PageIndex(targetAddr.ToUInt32()));
if (targetAddr == Pointer.Zero || length == 0)
return -ErrorCode.EINVAL;
File file = null;
GenericINode inode = null;
if ((flags & MAP_ANONYMOUS) == 0)
{
file = proc.LookupFile(fd);
if (file == null)
return -ErrorCode.EBADF;
inode = file.inode;
}
int memorySize = Arch.ArchDefinition.PageAlign(length);
// fix for code contract
if (length > memorySize)
length = memorySize;
if ((file != null && length == 0) || length < 0)
return -ErrorCode.EINVAL;
if (file == null)
{
pgoffset = 0;
length = 0;
}
//
// Be careful for shared mapping -- which could be a shared memory region coming from Linux.
// In this case we'll need to (1) call mmap() in the shadow process to obtain a valid mapping
// (2) when a page fault happens, grabs the physical page from linux.
//
if ((flags & MAP_SHARED) != 0 && SharedWithLinux(inode))
{
// Don't know how to deal with it...
if (addr != UserPtr.Zero)
return -ErrorCode.EINVAL;
var vaddr = Arch.IPCStubs.linux_sys_alien_mmap2(current.Parent.helperPid, addr.Value, length,
prot, flags, inode.LinuxFd, pgoffset);
if (vaddr > AddressSpace.KERNEL_OFFSET)
return -ErrorCode.EINVAL;
switch (inode.kind)
{
case GenericINode.INodeKind.BinderSharedINodeKind:
case GenericINode.INodeKind.AshmemINodeKind:
case GenericINode.INodeKind.ScreenBufferINodeKind:
inode.AlienSharedMemoryINode.vaddrInShadowProcess = new Pointer(vaddr);
break;
default:
// UNIMPLEMENTED... let's return EINVAL to make sure we can catch it.
return -ErrorCode.EINVAL;
}
}
var r = space.AddMapping(ProtToAccessFlag(prot), flags, file,
(uint)pgoffset * Arch.ArchDefinition.PageSize, length, targetAddr, memorySize);
if (r < 0)
return r;
//
// HACK for binder IPC
//
if (inode != null && inode.kind == GenericINode.INodeKind.BinderINodeKind)
{
proc.binderVMStart = new UserPtr(targetAddr);
proc.binderVMSize = length;
}
return targetAddr.ToInt32();
}
public static int mmap2(Thread current, UserPtr addr, int length, int prot, int flags, int fd, int pgoffset)
{
Contract.Requires(current.Parent == current.Parent.Space.GhostOwner);
Pointer targetAddr = new Pointer(Arch.ArchDefinition.PageAlign(addr.Value.ToUInt32()));
//Arch.Console.Write("mmap2:");
//Arch.Console.Write(addr.Value.ToInt32());
//Arch.Console.Write(" sz=");
//Arch.Console.Write(length);
//Arch.Console.Write(" prot=");
//Arch.Console.Write(prot);
//Arch.Console.WriteLine();
var proc = current.Parent;
var space = proc.Space;
Contract.Assert(proc == space.GhostOwner);
if ((flags & MAP_FIXED) == 0)
{
if (targetAddr == Pointer.Zero || space.ContainRegion(targetAddr, length))
{
targetAddr = space.FindFreeRegion(length);
}
}
else if (Arch.ArchDefinition.PageOffset(addr.Value.ToInt32()) != 0)
{
return(-ErrorCode.EINVAL);
}
targetAddr = new Pointer(Arch.ArchDefinition.PageIndex(targetAddr.ToUInt32()));
if (targetAddr == Pointer.Zero || length == 0)
{
return(-ErrorCode.EINVAL);
}
File file = null;
GenericINode inode = null;
if ((flags & MAP_ANONYMOUS) == 0)
{
file = proc.LookupFile(fd);
if (file == null)
{
return(-ErrorCode.EBADF);
}
inode = file.inode;
}
int memorySize = Arch.ArchDefinition.PageAlign(length);
// fix for code contract
if (length > memorySize)
{
length = memorySize;
}
if ((file != null && length == 0) || length < 0)
{
return(-ErrorCode.EINVAL);
}
if (file == null)
{
pgoffset = 0;
length = 0;
}
//
// Be careful for shared mapping -- which could be a shared memory region coming from Linux.
// In this case we'll need to (1) call mmap() in the shadow process to obtain a valid mapping
// (2) when a page fault happens, grabs the physical page from linux.
//
if ((flags & MAP_SHARED) != 0 && SharedWithLinux(inode))
{
// Don't know how to deal with it...
if (addr != UserPtr.Zero)
{
return(-ErrorCode.EINVAL);
}
var vaddr = Arch.IPCStubs.linux_sys_alien_mmap2(current.Parent.helperPid, addr.Value, length,
prot, flags, inode.LinuxFd, pgoffset);
if (vaddr > AddressSpace.KERNEL_OFFSET)
{
return(-ErrorCode.EINVAL);
}
switch (inode.kind)
{
case GenericINode.INodeKind.BinderSharedINodeKind:
case GenericINode.INodeKind.AshmemINodeKind:
case GenericINode.INodeKind.ScreenBufferINodeKind:
inode.AlienSharedMemoryINode.vaddrInShadowProcess = new Pointer(vaddr);
break;
default:
// UNIMPLEMENTED... let's return EINVAL to make sure we can catch it.
return(-ErrorCode.EINVAL);
}
}
var r = space.AddMapping(ProtToAccessFlag(prot), flags, file,
(uint)pgoffset * Arch.ArchDefinition.PageSize, length, targetAddr, memorySize);
if (r < 0)
{
return(r);
}
//
// HACK for binder IPC
//
if (inode != null && inode.kind == GenericINode.INodeKind.BinderINodeKind)
{
proc.binderVMStart = new UserPtr(targetAddr);
proc.binderVMSize = length;
}
return(targetAddr.ToInt32());
}
