mirror of
https://github.com/Fennix-Project/Kernel.git
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116 lines
2.5 KiB
C++
116 lines
2.5 KiB
C++
/*
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This file is part of Fennix Kernel.
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Fennix Kernel is free software: you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation, either version 3 of
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the License, or (at your option) any later version.
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Fennix Kernel is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef __FENNIX_KERNEL_MEMORY_STACK_GUARD_H__
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#define __FENNIX_KERNEL_MEMORY_STACK_GUARD_H__
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#include <types.h>
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#include <list>
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#include <memory/table.hpp>
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#include <memory/vma.hpp>
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namespace Memory
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{
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class StackGuard
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{
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private:
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struct AllocatedPages
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{
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void *PhysicalAddress;
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void *VirtualAddress;
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};
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void *StackBottom = nullptr;
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void *StackTop = nullptr;
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void *StackPhysicalBottom = nullptr;
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void *StackPhysicalTop = nullptr;
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uint64_t Size = 0;
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bool UserMode = false;
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bool Expanded = false;
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VirtualMemoryArea *vma = nullptr;
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std::list<AllocatedPages> AllocatedPagesList;
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public:
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std::list<AllocatedPages> GetAllocatedPages()
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{
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return AllocatedPagesList;
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}
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/** Fork stack guard */
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void Fork(StackGuard *Parent);
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/** For general info */
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uint64_t GetSize() { return Size; }
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/** For general info */
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bool GetUserMode() { return UserMode; }
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/** For general info */
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bool IsExpanded() { return Expanded; }
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/** For general info */
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void *GetStackBottom() { return StackBottom; }
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/** For RSP */
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void *GetStackTop() { return StackTop; }
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/**
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* For general info (avoid if possible)
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*
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* @note This can be used only if the
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* stack was NOT expanded.
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*/
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void *GetStackPhysicalBottom()
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{
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if (Expanded)
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return nullptr;
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return StackPhysicalBottom;
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}
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/**
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* For general info (avoid if possible)
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*
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* @note This can be used only if the
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* stack was NOT expanded.
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*/
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void *GetStackPhysicalTop()
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{
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if (Expanded)
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return nullptr;
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return StackPhysicalTop;
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}
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/**
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* Called by exception handler */
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bool Expand(uintptr_t FaultAddress);
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/**
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* Construct a new Stack Guard object
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* @param User Stack for user mode?
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*/
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StackGuard(bool User, VirtualMemoryArea *vma);
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/**
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* Destroy the Stack Guard object
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*/
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~StackGuard();
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};
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}
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#endif // !__FENNIX_KERNEL_MEMORY_STACK_GUARD_H__
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