[zion] Move to default permissions being supplied by KernelObjects

zion/object/address_space.h

@@ -4,6 +4,7 @@
 #include <glacier/memory/ref_ptr.h>
 #include <stdint.h>
 
+#include "include/ztypes.h"
 #include "memory/user_stack_manager.h"
 #include "object/memory_object.h"
 
@@ -36,6 +37,8 @@ class AddressSpace : public KernelObject {
  public:
   uint64_t TypeTag() override { return KernelObject::ADDRESS_SPACE; }
 
+  static uint64_t DefaultPermissions() { return kZionPerm_Write; }
+
   enum MemoryType {
     UNSPECIFIED,
     UNMAPPED,

zion/object/channel.h

@@ -21,6 +21,10 @@ struct KernelObjectTag<Channel> {
 class Channel : public IpcObject {
  public:
   uint64_t TypeTag() override { return KernelObject::CHANNEL; }
+  static uint64_t DefaultPermissions() {
+    return kZionPerm_Read | kZionPerm_Write;
+  }
+
   static glcr::Pair<glcr::RefPtr<Channel>, glcr::RefPtr<Channel>>
   CreateChannelPair();
 

zion/object/endpoint.h

@@ -20,6 +20,10 @@ struct KernelObjectTag<Endpoint> {
 class Endpoint : public IpcObject {
  public:
   uint64_t TypeTag() override { return KernelObject::ENDPOINT; }
+  static uint64_t DefaultPermissions() {
+    return kZionPerm_Read | kZionPerm_Write;
+  }
+
   static glcr::RefPtr<Endpoint> Create();
 
   glcr::ErrorCode Read(uint64_t* num_bytes, void* data,

zion/object/memory_object.h

@@ -4,6 +4,7 @@
 #include <glacier/memory/ref_ptr.h>
 #include <glacier/status/error_or.h>
 
+#include "include/ztypes.h"
 #include "object/kernel_object.h"
 
 class MemoryObject;
@@ -21,6 +22,10 @@ struct KernelObjectTag<MemoryObject> {
 class MemoryObject : public KernelObject {
  public:
   uint64_t TypeTag() override { return KernelObject::MEMORY_OBJECT; }
+  static uint64_t DefaultPermissions() {
+    return kZionPerm_Write | kZionPerm_Read;
+  }
+
   MemoryObject(uint64_t size);
 
   uint64_t size() { return size_; }

zion/object/port.h

@@ -21,6 +21,9 @@ struct KernelObjectTag<Port> {
 class Port : public IpcObject {
  public:
   uint64_t TypeTag() override { return KernelObject::PORT; }
+  static uint64_t DefaultPermissions() {
+    return kZionPerm_Write | kZionPerm_Read;
+  }
 
   Port() = default;
 

zion/object/process.h

@@ -22,6 +22,11 @@ struct KernelObjectTag<Process> {
 class Process : public KernelObject {
  public:
   uint64_t TypeTag() override { return KernelObject::PROCESS; }
+  static uint64_t DefaultPermissions() {
+    return kZionPerm_Write | kZionPerm_Read | kZionPerm_SpawnThread |
+           kZionPerm_SpawnProcess;
+  }
+
   enum State {
     UNSPECIFIED,
     SETUP,
@@ -44,6 +49,10 @@ class Process : public KernelObject {
   uint64_t AddNewCapability(const glcr::RefPtr<T>& obj, uint64_t permissions) {
     return caps_.AddNewCapability(obj, permissions);
   }
+  template <typename T>
+  uint64_t AddNewCapability(const glcr::RefPtr<T>& obj) {
+    return caps_.AddNewCapability(obj);
+  }
   uint64_t AddExistingCapability(const glcr::RefPtr<Capability>& cap);
 
   // Checks the state of all child threads and transitions to

zion/object/thread.h

@@ -4,6 +4,7 @@
 #include <glacier/memory/ref_ptr.h>
 #include <stdint.h>
 
+#include "include/ztypes.h"
 #include "object/kernel_object.h"
 
 // Forward decl due to cyclic dependency.
@@ -18,6 +19,10 @@ struct KernelObjectTag<Thread> {
 class Thread : public KernelObject, public glcr::IntrusiveListNode<Thread> {
  public:
   uint64_t TypeTag() override { return KernelObject::THREAD; }
+  static uint64_t DefaultPermissions() {
+    return kZionPerm_Read | kZionPerm_Write;
+  }
+
   enum State {
     UNSPECIFIED,
     CREATED,