KDBG/TaskEffectivePolicy.hpp

   1 //
   2 //  TaskEffectivePolicy.hpp
   3 //  system_cmds
   4 //
   5 //  Created by James McIlree on 6/19/14.
   6 //
   7 //
   8
   9 // Using the raw struct was causing alignment issues on arm32; it seems that
  10 // structs have very relaxed alignment requirements on the v7 architectures.
  11 // The class wrapper forces a higher alignment and allows for some convenience
  12 // operators (compare, xor, etc)
  13
  14 class TaskEffectivePolicy {
  15     protected:
  16         union {
  17                 Kernel32::ptr_t _kernel_32[2];
  18                 Kernel64::ptr_t _kernel_64;
  19                 struct task_effective_policy _policy;
  20         } _content;
  21
  22     public:
  23         TaskEffectivePolicy() {}
  24
  25         TaskEffectivePolicy(struct task_effective_policy policy) {
  26                 static_assert(sizeof(_content) == sizeof(struct task_effective_policy), "Sanity");
  27                 _content._policy = policy;
  28         }
  29
  30         TaskEffectivePolicy(Kernel64::ptr_t teffective_0) {
  31                 static_assert(sizeof(_content) == sizeof(teffective_0), "Sanity");
  32                 _content._kernel_64 = teffective_0;
  33         }
  34
  35         TaskEffectivePolicy(Kernel32::ptr_t teffective_0, Kernel32::ptr_t teffective_1) {
  36                 static_assert(sizeof(_content) == (sizeof(teffective_0) + sizeof(teffective_1)), "Sanity");
  37                 _content._kernel_32[0] = teffective_0;
  38                 _content._kernel_32[1] = teffective_1;
  39         }
  40
  41         bool operator==(const TaskEffectivePolicy& other) const                 { return this->_content._kernel_64 == other._content._kernel_64; }
  42         bool operator!=(const TaskEffectivePolicy& other) const                 { return !(*this == other); }
  43
  44         TaskEffectivePolicy operator~() const                                   { return TaskEffectivePolicy(~this->_content._kernel_64); }
  45
  46         struct task_effective_policy as_struct() { return _content._policy; }
  47 };