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Alex
@ -152,58 +152,238 @@ namespace Memory
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XD = (uint64_t)1 << 63
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};
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typedef union __attribute__((packed))
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/* 2.2 Paging in IA-32e Mode - https://composter.com.ua/documents/TLBs_Paging-Structure_Caches_and_Their_Invalidation.pdf */
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union __attribute__((packed)) PageTableEntry
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{
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struct
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{
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#if defined(__amd64__)
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bool Present : 1;
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bool ReadWrite : 1;
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bool UserSupervisor : 1;
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bool WriteThrough : 1;
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bool CacheDisable : 1;
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bool Accessed : 1;
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bool Dirty : 1;
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bool PageSize : 1;
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bool Global : 1;
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uint8_t Available1 : 3;
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bool PageAttributeTable : 1;
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uint64_t Reserved : 39;
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uint32_t Available2 : 7;
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uint16_t ProtectionKey : 4;
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bool ExecuteDisable : 1;
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#elif defined(__i386__)
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bool Present : 1;
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bool ReadWrite : 1;
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bool UserSupervisor : 1;
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bool Accessed : 1;
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bool Dirty : 1;
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uint8_t Available : 7;
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uint32_t Frame : 20;
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// TODO: i386 PDEData is not tested
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#elif defined(__aarch64__)
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// TODO: aarch64 PDEData not implemented
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#endif
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bool Present : 1; // 0
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bool ReadWrite : 1; // 1
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bool UserSupervisor : 1; // 2
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bool WriteThrough : 1; // 3
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bool CacheDisable : 1; // 4
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bool Accessed : 1; // 5
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bool Dirty : 1; // 6
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bool PageAttributeTable : 1; // 7
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bool Global : 1; // 8
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uint8_t Available0 : 3; // 9-11
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uint64_t Address : 40; // 12-51
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uint32_t Available1 : 7; // 52-58
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bool ProtectionKey : 4; // 59-62
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bool ExecuteDisable : 1; // 63
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};
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uint64_t raw;
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} PDEData;
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struct __attribute__((packed)) PageDirectoryEntry
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{
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PDEData Value;
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void AddFlag(uint64_t Flag);
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void RemoveFlags(uint64_t Flag);
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void ClearFlags();
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void SetFlag(uint64_t Flag, bool Enabled);
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bool GetFlag(uint64_t Flag);
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uint64_t GetFlag();
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void SetAddress(uint64_t Address);
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uint64_t GetAddress();
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/** @brief Set Address */
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void SetAddress(uint64_t _Address)
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{
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#if defined(__amd64__)
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_Address &= 0x000000FFFFFFFFFF;
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this->raw &= 0xFFF0000000000FFF;
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this->raw |= (_Address << 12);
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#elif defined(__i386__)
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_Address &= 0x000FFFFF;
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this->raw &= 0xFFC00003;
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this->raw |= (_Address << 12);
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#elif defined(__aarch64__)
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_Address &= 0x000000FFFFFFFFFF;
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this->raw &= 0xFFF0000000000FFF;
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this->raw |= (_Address << 12);
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#endif
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}
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/** @brief Get Address */
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uint64_t GetAddress()
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{
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#if defined(__amd64__)
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return (this->raw & 0x000FFFFFFFFFF000) >> 12;
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#elif defined(__i386__)
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return (this->raw & 0x003FFFFF000) >> 12;
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#elif defined(__aarch64__)
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return (this->raw & 0x000FFFFFFFFFF000) >> 12;
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#endif
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}
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};
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struct PageTable
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struct __attribute__((packed)) PageTableEntryPtr
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{
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PageDirectoryEntry Entries[512];
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PageTableEntry Entries[511];
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};
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union __attribute__((packed)) PageDirectoryEntry
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{
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struct
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{
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bool Present : 1; // 0
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bool ReadWrite : 1; // 1
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bool UserSupervisor : 1; // 2
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bool WriteThrough : 1; // 3
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bool CacheDisable : 1; // 4
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bool Accessed : 1; // 5
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bool Available0 : 1; // 6
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bool PageSize : 1; // 7
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uint8_t Available1 : 4; // 8-11
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uint64_t Address : 40; // 12-51
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uint32_t Available2 : 11; // 52-62
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bool ExecuteDisable : 1; // 63
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};
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uint64_t raw;
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/** @brief Set PageTableEntryPtr address */
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void SetAddress(uint64_t _Address)
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{
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#if defined(__amd64__)
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_Address &= 0x000000FFFFFFFFFF;
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this->raw &= 0xFFF0000000000FFF;
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this->raw |= (_Address << 12);
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#elif defined(__i386__)
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_Address &= 0x000FFFFF;
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this->raw &= 0xFFC00003;
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this->raw |= (_Address << 12);
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#elif defined(__aarch64__)
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_Address &= 0x000000FFFFFFFFFF;
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this->raw &= 0xFFF0000000000FFF;
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this->raw |= (_Address << 12);
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#endif
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}
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/** @brief Get PageTableEntryPtr address */
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uint64_t GetAddress()
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{
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#if defined(__amd64__)
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return (this->raw & 0x000FFFFFFFFFF000) >> 12;
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#elif defined(__i386__)
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return (this->raw & 0x003FFFFF000) >> 12;
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#elif defined(__aarch64__)
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return (this->raw & 0x000FFFFFFFFFF000) >> 12;
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#endif
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}
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};
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struct __attribute__((packed)) PageDirectoryEntryPtr
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{
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PageDirectoryEntry Entries[511];
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};
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union __attribute__((packed)) PageDirectoryPointerTableEntry
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{
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struct
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{
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bool Present : 1; // 0
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bool ReadWrite : 1; // 1
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bool UserSupervisor : 1; // 2
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bool WriteThrough : 1; // 3
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bool CacheDisable : 1; // 4
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bool Accessed : 1; // 5
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bool Available0 : 1; // 6
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bool PageSize : 1; // 7
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uint8_t Available1 : 4; // 8-11
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uint64_t Address : 40; // 12-51
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uint32_t Available2 : 11; // 52-62
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bool ExecuteDisable : 1; // 63
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};
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uint64_t raw;
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/** @brief Set PageDirectoryEntryPtr address */
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void SetAddress(uint64_t _Address)
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{
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#if defined(__amd64__)
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_Address &= 0x000000FFFFFFFFFF;
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this->raw &= 0xFFF0000000000FFF;
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this->raw |= (_Address << 12);
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#elif defined(__i386__)
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_Address &= 0x000FFFFF;
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this->raw &= 0xFFC00003;
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this->raw |= (_Address << 12);
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#elif defined(__aarch64__)
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_Address &= 0x000000FFFFFFFFFF;
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this->raw &= 0xFFF0000000000FFF;
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this->raw |= (_Address << 12);
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#endif
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}
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/** @brief Get PageDirectoryEntryPtr address */
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uint64_t GetAddress()
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{
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#if defined(__amd64__)
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return (this->raw & 0x000FFFFFFFFFF000) >> 12;
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#elif defined(__i386__)
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return (this->raw & 0x003FFFFF000) >> 12;
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#elif defined(__aarch64__)
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return (this->raw & 0x000FFFFFFFFFF000) >> 12;
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#endif
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}
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};
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struct __attribute__((packed)) PageDirectoryPointerTableEntryPtr
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{
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PageDirectoryPointerTableEntry Entries[511];
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};
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union __attribute__((packed)) PageMapLevel4
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{
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struct
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{
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bool Present : 1; // 0
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bool ReadWrite : 1; // 1
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bool UserSupervisor : 1; // 2
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bool WriteThrough : 1; // 3
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bool CacheDisable : 1; // 4
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bool Accessed : 1; // 5
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bool Available0 : 1; // 6
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bool Reserved0 : 1; // 7
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uint8_t Available1 : 4; // 8-11
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uint64_t Address : 40; // 12-51
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uint32_t Available2 : 11; // 52-62
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bool ExecuteDisable : 1; // 63
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};
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uint64_t raw;
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/** @brief Set PageDirectoryPointerTableEntryPtr address */
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void SetAddress(uint64_t _Address)
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{
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#if defined(__amd64__)
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_Address &= 0x000000FFFFFFFFFF;
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this->raw &= 0xFFF0000000000FFF;
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this->raw |= (_Address << 12);
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#elif defined(__i386__)
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_Address &= 0x000FFFFF;
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this->raw &= 0xFFC00003;
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this->raw |= (_Address << 12);
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#elif defined(__aarch64__)
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_Address &= 0x000000FFFFFFFFFF;
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this->raw &= 0xFFF0000000000FFF;
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this->raw |= (_Address << 12);
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#endif
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}
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/** @brief Get PageDirectoryPointerTableEntryPtr address */
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uint64_t GetAddress()
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{
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#if defined(__amd64__)
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return (this->raw & 0x000FFFFFFFFFF000) >> 12;
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#elif defined(__i386__)
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return (this->raw & 0x003FFFFF000) >> 12;
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#elif defined(__aarch64__)
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return (this->raw & 0x000FFFFFFFFFF000) >> 12;
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#endif
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}
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};
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struct PageTable4
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{
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PageMapLevel4 Entries[511];
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} __attribute__((aligned(0x1000)));
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struct __attribute__((packed)) PageMapLevel5
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{
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/* FIXME: NOT IMPLEMENTED! */
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};
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struct PageTable5
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{
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PageMapLevel5 Entries[511];
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} __attribute__((aligned(0x1000)));
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class Physical
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@ -337,16 +517,16 @@ namespace Memory
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{
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private:
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NewLock(MemoryLock);
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PageTable *Table = nullptr;
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PageTable4 *Table = nullptr;
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public:
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class PageMapIndexer
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{
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public:
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uint64_t PDPIndex = 0;
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uint64_t PDIndex = 0;
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uint64_t PTIndex = 0;
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uint64_t PIndex = 0;
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uint64_t PMLIndex = 0;
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uint64_t PDPTEIndex = 0;
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uint64_t PDEIndex = 0;
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uint64_t PTEIndex = 0;
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PageMapIndexer(uint64_t VirtualAddress);
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};
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@ -408,7 +588,7 @@ namespace Memory
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*
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* @param Table Page table. If null, it will use the current page table.
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*/
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Virtual(PageTable *Table = nullptr);
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Virtual(PageTable4 *Table = nullptr);
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/**
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* @brief Destroy the Virtual object
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@ -426,7 +606,7 @@ namespace Memory
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void *SGT = nullptr;
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uint64_t Size = 0;
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bool UserMode = false;
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PageTable *Table = nullptr;
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PageTable4 *Table = nullptr;
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public:
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/** @brief For general info */
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@ -439,7 +619,7 @@ namespace Memory
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* @brief 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, PageTable *Table);
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StackGuard(bool User, PageTable4 *Table);
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/**
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* @brief Destroy the Stack Guard object
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*/
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@ -470,8 +650,8 @@ void operator delete(void *Pointer, long unsigned int Size);
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void operator delete[](void *Pointer, long unsigned int Size);
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extern Memory::Physical KernelAllocator;
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extern Memory::PageTable *KernelPageTable;
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extern Memory::PageTable *UserspaceKernelOnlyPageTable;
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extern Memory::PageTable4 *KernelPageTable;
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extern Memory::PageTable4 *UserspaceKernelOnlyPageTable;
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#endif // __cplusplus
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