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Kernel: Add debug register handling

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This patch adds functions to read/write from the debug registers,
and implements storing/loading them across context switches.
This commit is contained in:
FalseHonesty 2021-04-15 12:29:00 -04:00 • committed by Andreas Kling
parent c84107a1ab
commit 97a4c627cb
3 changed files with 97 additions and 11 deletions
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4
Kernel/Thread.h
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@ -763,6 +763,9 @@ public:
RegisterState& get_register_dump_from_stack();
const RegisterState& get_register_dump_from_stack() const { return const_cast<Thread*>(this)->get_register_dump_from_stack(); }
DebugRegisterState& debug_register_state() { return m_debug_register_state; }
const DebugRegisterState& debug_register_state() const { return m_debug_register_state; }
TSS& tss() { return m_tss; }
const TSS& tss() const { return m_tss; }
State state() const { return m_state; }
@ -1200,6 +1203,7 @@ private:
NonnullRefPtr<Process> m_process;
ThreadID m_tid { -1 };
TSS m_tss {};
DebugRegisterState m_debug_register_state {};
TrapFrame* m_current_trap { nullptr };
u32 m_saved_critical { 1 };
IntrusiveListNode<Thread> m_ready_queue_node;