diff options
| author | Amlal El Mahrouss <amlal.elmahrouss@icloud.com> | 2025-03-23 19:13:48 +0100 |
|---|---|---|
| committer | Amlal El Mahrouss <amlal.elmahrouss@icloud.com> | 2025-03-23 19:15:17 +0100 |
| commit | a13e1c0911c0627184bc38f18c7fdda64447b3ad (patch) | |
| tree | 073a62c09bf216e85a3f310376640fa1805147f9 /dev/Kernel/src/MemoryMgr.cc | |
| parent | 149fa096eb306d03686b3b67e813cf1a78e08cd0 (diff) | |
meta(kernel): Reworked repository's filesystem structure.
Removing useless parts of the project too.
Signed-off-by: Amlal El Mahrouss <amlal.elmahrouss@icloud.com>
Diffstat (limited to 'dev/Kernel/src/MemoryMgr.cc')
| -rw-r--r-- | dev/Kernel/src/MemoryMgr.cc | 289 |
1 files changed, 0 insertions, 289 deletions
diff --git a/dev/Kernel/src/MemoryMgr.cc b/dev/Kernel/src/MemoryMgr.cc deleted file mode 100644 index 4e13ea15..00000000 --- a/dev/Kernel/src/MemoryMgr.cc +++ /dev/null @@ -1,289 +0,0 @@ -/* ------------------------------------------- - - Copyright (C) 2024-2025, Amlal EL Mahrouss, all rights reserved. - -------------------------------------------- */ - -#include <KernelKit/DebugOutput.h> -#include <KernelKit/LPC.h> -#include <KernelKit/MemoryMgr.h> -#include <NewKit/Crc32.h> -#include <NewKit/PageMgr.h> -#include <NewKit/Utils.h> -#include <ArchKit/ArchKit.h> - -/* ------------------------------------------- - - Revision History: - 10/8/24: FIX: Fix useless long name, alongside a new WR (WriteRead) field. - 20/10/24: Fix mm_new_ and mm_delete_ APIs inside MemoryMgr.h header. (amlal) - 27/01/25: Reworked code as the memory manager. - - ------------------------------------------- */ - -//! @file MemoryMgr.cc -//! @brief Heap algorithm that serves as the main memory manager. - -#define kKernelHeapMagic (0xD4D75) -#define kKernelHeapAlignSz (__BIGGEST_ALIGNMENT__) - -namespace NeOS -{ - /// @brief Contains data structures and algorithms for the heap. - namespace Detail - { - struct PACKED HEAP_INFORMATION_BLOCK; - - /// @brief Kernel heap information block. - /// Located before the address bytes. - /// | HIB | CLASS/STRUCT/DATA TYPES... | - struct PACKED HEAP_INFORMATION_BLOCK final - { - ///! @brief 32-bit value which contains the magic number of the heap. - UInt32 fMagic : 24; - - ///! @brief Is the heap present? - UInt8 fPresent : 1; - - /// @brief Is this value writable? - UInt8 fWriteRead : 1; - - /// @brief Is this value owned by the user? - UInt8 fUser : 1; - - /// @brief Is this a page pointer? - UInt8 fPage : 1; - - /// @brief 32-bit CRC checksum. - UInt32 fCRC32; - - /// @brief 64-bit Allocation flags. - UInt16 fFlags; - - /// @brief 64-bit pointer size. - SizeT fSize; - - /// @brief 64-bit target offset pointer. - UIntPtr fOffset; - - /// @brief Padding bytes for header. - UInt8 fPadding[kKernelHeapAlignSz]; - }; - - /// @brief Check for heap address validity. - /// @param heap_ptr The address_ptr to check. - /// @return Bool if the pointer is valid or not. - _Output auto mm_check_heap_address(VoidPtr heap_ptr) -> Bool - { - if (!heap_ptr) - return false; - - auto base_heap = ((IntPtr)heap_ptr) - sizeof(Detail::HEAP_INFORMATION_BLOCK); - - /// Add that check in case we're having an integer underflow. /// - - if (base_heap < 0) - { - return false; - } - - return true; - } - - typedef HEAP_INFORMATION_BLOCK* HEAP_INFORMATION_BLOCK_PTR; - } // namespace Detail - - /// @brief Declare a new size for ptr_heap. - /// @param ptr_heap the pointer. - /// @return Newly allocated heap header. - _Output auto mm_realloc_heap(VoidPtr ptr_heap, SizeT new_sz) -> VoidPtr - { - if (Detail::mm_check_heap_address(ptr_heap) == No) - return nullptr; - - if (!ptr_heap || new_sz < 1) - return nullptr; - - kout << "This function is not implemented by NeOSKrnl, please use the BSD's realloc instead.\r"; - ke_panic(RUNTIME_CHECK_INVALID); - - return nullptr; - } - - /// @brief Allocate chunk of memory. - /// @param sz Size of pointer - /// @param wr Read Write bit. - /// @param user User enable bit. - /// @return The newly allocated pointer. - _Output VoidPtr mm_new_heap(const SizeT sz, const bool wr, const bool user) - { - auto sz_fix = sz; - - if (sz_fix == 0) - return nullptr; - - sz_fix += sizeof(Detail::HEAP_INFORMATION_BLOCK); - - PageMgr heap_mgr; - auto wrapper = heap_mgr.Request(wr, user, No, sz_fix); - - Detail::HEAP_INFORMATION_BLOCK_PTR heap_info_ptr = - reinterpret_cast<Detail::HEAP_INFORMATION_BLOCK_PTR>( - wrapper.VirtualAddress() + sizeof(Detail::HEAP_INFORMATION_BLOCK)); - - heap_info_ptr->fSize = sz_fix; - heap_info_ptr->fMagic = kKernelHeapMagic; - heap_info_ptr->fCRC32 = 0; // dont fill it for now. - heap_info_ptr->fOffset = reinterpret_cast<UIntPtr>(heap_info_ptr) + sizeof(Detail::HEAP_INFORMATION_BLOCK); - heap_info_ptr->fPage = No; - heap_info_ptr->fWriteRead = wr; - heap_info_ptr->fUser = user; - heap_info_ptr->fPresent = Yes; - - rt_set_memory(heap_info_ptr->fPadding, 0, kKernelHeapAlignSz); - - auto result = reinterpret_cast<VoidPtr>(heap_info_ptr->fOffset); - - kout << "Registered heap address: " << hex_number(reinterpret_cast<UIntPtr>(heap_info_ptr)) << kendl; - - return result; - } - - /// @brief Makes a page heap. - /// @param heap_ptr the pointer to make a page heap. - /// @return kErrorSuccess if successful, otherwise an error code. - _Output Int32 mm_make_page(VoidPtr heap_ptr) - { - if (Detail::mm_check_heap_address(heap_ptr) == No) - return kErrorHeapNotPresent; - - Detail::HEAP_INFORMATION_BLOCK_PTR heap_info_ptr = - reinterpret_cast<Detail::HEAP_INFORMATION_BLOCK_PTR>( - (UIntPtr)heap_ptr - sizeof(Detail::HEAP_INFORMATION_BLOCK)); - - if (!heap_info_ptr) - return kErrorHeapNotPresent; - - heap_info_ptr->fPage = true; - - kout << "Registered page address: " << hex_number(reinterpret_cast<UIntPtr>(heap_info_ptr)) << kendl; - - return kErrorSuccess; - } - - /// @brief Overwrites and set the flags of a heap header. - /// @param heap_ptr the pointer to update. - /// @param flags the flags to set. - _Output Int32 mm_make_flags(VoidPtr heap_ptr, UInt64 flags) - { - if (Detail::mm_check_heap_address(heap_ptr) == No) - return kErrorHeapNotPresent; - - Detail::HEAP_INFORMATION_BLOCK_PTR heap_info_ptr = - reinterpret_cast<Detail::HEAP_INFORMATION_BLOCK_PTR>( - (UIntPtr)heap_ptr - sizeof(Detail::HEAP_INFORMATION_BLOCK)); - - if (!heap_info_ptr) - return kErrorHeapNotPresent; - - heap_info_ptr->fFlags = flags; - - return kErrorSuccess; - } - - /// @brief Gets the flags of a heap header. - /// @param heap_ptr the pointer to get. - _Output UInt64 mm_get_flags(VoidPtr heap_ptr) - { - Detail::HEAP_INFORMATION_BLOCK_PTR heap_info_ptr = - reinterpret_cast<Detail::HEAP_INFORMATION_BLOCK_PTR>( - (UIntPtr)heap_ptr - sizeof(Detail::HEAP_INFORMATION_BLOCK)); - - if (!heap_info_ptr) - return kErrorHeapNotPresent; - - return heap_info_ptr->fFlags; - } - - /// @brief Declare pointer as free. - /// @param heap_ptr the pointer. - /// @return - _Output Int32 mm_delete_heap(VoidPtr heap_ptr) - { - if (Detail::mm_check_heap_address(heap_ptr) == No) - return kErrorHeapNotPresent; - - Detail::HEAP_INFORMATION_BLOCK_PTR heap_info_ptr = - reinterpret_cast<Detail::HEAP_INFORMATION_BLOCK_PTR>( - (UIntPtr)(heap_ptr) - sizeof(Detail::HEAP_INFORMATION_BLOCK)); - - if (heap_info_ptr && heap_info_ptr->fMagic == kKernelHeapMagic) - { - if (!heap_info_ptr->fPresent) - { - return kErrorHeapNotPresent; - } - - heap_info_ptr->fSize = 0UL; - heap_info_ptr->fPresent = No; - heap_info_ptr->fOffset = 0; - heap_info_ptr->fCRC32 = 0; - heap_info_ptr->fWriteRead = No; - heap_info_ptr->fUser = No; - heap_info_ptr->fMagic = 0; - - PTEWrapper page_wrapper(No, No, No, reinterpret_cast<UIntPtr>(heap_info_ptr) - sizeof(Detail::HEAP_INFORMATION_BLOCK)); - Ref<PTEWrapper> pte_address{page_wrapper}; - - PageMgr heap_mgr; - heap_mgr.Free(pte_address); - - kout << "Address has been successfully freed." << kendl; - - return kErrorSuccess; - } - - return kErrorInternal; - } - - /// @brief Check if pointer is a valid Kernel pointer. - /// @param heap_ptr the pointer - /// @return if it exists. - _Output Boolean mm_is_valid_heap(VoidPtr heap_ptr) - { - if (heap_ptr && HAL::mm_is_bitmap(heap_ptr)) - { - Detail::HEAP_INFORMATION_BLOCK_PTR heap_info_ptr = - reinterpret_cast<Detail::HEAP_INFORMATION_BLOCK_PTR>( - (UIntPtr)(heap_ptr) - sizeof(Detail::HEAP_INFORMATION_BLOCK)); - - return (heap_info_ptr && heap_info_ptr->fPresent && heap_info_ptr->fMagic == kKernelHeapMagic); - } - - return No; - } - - /// @brief Protect the heap with a CRC value. - /// @param heap_ptr HIB pointer. - /// @return if it valid: point has crc now., otherwise fail. - _Output Boolean mm_protect_heap(VoidPtr heap_ptr) - { - if (heap_ptr) - { - Detail::HEAP_INFORMATION_BLOCK_PTR heap_info_ptr = - reinterpret_cast<Detail::HEAP_INFORMATION_BLOCK_PTR>( - (UIntPtr)heap_ptr - sizeof(Detail::HEAP_INFORMATION_BLOCK)); - - /// if valid, present and is heap header, then compute crc32 - if (heap_info_ptr && heap_info_ptr->fPresent && kKernelHeapMagic == heap_info_ptr->fMagic) - { - heap_info_ptr->fCRC32 = - ke_calculate_crc32((Char*)heap_info_ptr->fOffset, heap_info_ptr->fSize); - - return Yes; - } - } - - return No; - } -} // namespace NeOS |
