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61 lines
1.2 KiB
61 lines
1.2 KiB
4 years ago
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#pragma once
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#include "../mem_ctx/mem_ctx.hpp"
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namespace nasa
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{
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class patch_ctx
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{
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public:
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explicit patch_ctx(mem_ctx* mem_ctx);
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//
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// returns a virtual address mapping of the newly patched page(s).
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//
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void* patch(void* kernel_addr);
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__forceinline void enable()
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{
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mapped_pml4e->pfn = new_pml4e.pfn;
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}
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__forceinline void disable()
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{
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mapped_pml4e->pfn = old_pml4e.pfn;
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}
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private:
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//
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// std::pair< physical page, virtual address >
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//
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std::pair<void*, void*> make_pdpt(const pt_entries& kernel_entries, void* kernel_addr);
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std::pair<void*, void*> make_pd(const pt_entries& kernel_entries, void* kernel_addr);
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std::pair<void*, void*> make_pt(const pt_entries& kernel_entries, void* kernel_addr);
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std::pair<void*, void*> make_page(const pt_entries& kernel_entries, void* kernel_addr);
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//
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// context of the current process you want to patch.
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//
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mem_ctx* mem_ctx;
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//
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// newly created table entries and table pointers (pdpte, pde, pte)
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//
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pt_entries new_entries;
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//
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// old and new pml4e
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//
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pml4e new_pml4e;
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pml4e old_pml4e;
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//
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// kernel address of the patch.
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//
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void* kernel_addr;
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//
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// pointer to the mapped pml4e
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// used for enable/disable patch...
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//
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ppml4e mapped_pml4e;
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};
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}
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