1 /* 2 * FreeLoader 3 * Copyright (C) 1998-2003 Brian Palmer <brianp@sginet.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License along 16 * with this program; if not, write to the Free Software Foundation, Inc., 17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. 18 */ 19 20 #pragma once 21 22 extern char __ImageBase; 23 #ifdef __GNUC__ 24 /* .text/.data/.rdata, .edata and .bss */ 25 #define FREELDR_SECTION_COUNT 3 26 #else 27 #ifdef _M_AMD64 28 /* .text, .rdata/.edata, .pdata and .data/.bss */ 29 #define FREELDR_SECTION_COUNT 4 30 #else 31 /* .text, .rdata/.edata and .data/.bss */ 32 #define FREELDR_SECTION_COUNT 3 33 #endif 34 #endif 35 36 typedef struct _FREELDR_MEMORY_DESCRIPTOR 37 { 38 TYPE_OF_MEMORY MemoryType; 39 PFN_NUMBER BasePage; 40 PFN_NUMBER PageCount; 41 } FREELDR_MEMORY_DESCRIPTOR, *PFREELDR_MEMORY_DESCRIPTOR; 42 43 44 #if defined(__i386__) || defined(_PPC_) || defined(_MIPS_) || defined(_ARM_) 45 46 #define MM_PAGE_SIZE 4096 47 #define MM_PAGE_MASK 0xFFF 48 #define MM_PAGE_SHIFT 12 49 #define MM_MAX_PAGE 0xFFFFF 50 51 #define MM_SIZE_TO_PAGES(a) \ 52 ( ((a) >> MM_PAGE_SHIFT) + ((a) & MM_PAGE_MASK ? 1 : 0) ) 53 54 #endif // defined __i386__ or _PPC_ or _MIPS_ 55 56 #if defined (_AMD64_) 57 58 #define MM_PAGE_SIZE 4096 59 #define MM_PAGE_MASK 0xFFF 60 #define MM_PAGE_SHIFT 12 61 #define MM_MAX_PAGE 0x3FFFF /* freeldr only maps 1 GB */ 62 63 #define MM_SIZE_TO_PAGES(a) \ 64 ( ((a) >> MM_PAGE_SHIFT) + ((a) & MM_PAGE_MASK ? 1 : 0) ) 65 66 #endif 67 68 // HEAP and STACK size 69 #define HEAP_PAGES 0x400 70 #define STACK_PAGES 0x00 71 72 #include <pshpack1.h> 73 typedef struct 74 { 75 TYPE_OF_MEMORY PageAllocated; // Type of allocated memory (LoaderFree if this memory is free) 76 PFN_NUMBER PageAllocationLength; // Number of pages allocated (or zero if this isn't the first page in the chain) 77 } PAGE_LOOKUP_TABLE_ITEM, *PPAGE_LOOKUP_TABLE_ITEM; 78 #include <poppack.h> 79 80 // 81 // Define this to 1 if you want the entire contents 82 // of the memory allocation bitmap displayed 83 // when a chunk is allocated or freed 84 // 85 #define DUMP_MEM_MAP_ON_VERIFY 0 86 87 extern PVOID PageLookupTableAddress; 88 extern PFN_NUMBER TotalPagesInLookupTable; 89 extern PFN_NUMBER FreePagesInLookupTable; 90 extern PFN_NUMBER LastFreePageHint; 91 92 #if DBG 93 PCSTR MmGetSystemMemoryMapTypeString(TYPE_OF_MEMORY Type); 94 #endif 95 96 PFN_NUMBER MmGetPageNumberFromAddress(PVOID Address); // Returns the page number that contains a linear address 97 PFN_NUMBER MmGetAddressablePageCountIncludingHoles(VOID); // Returns the count of addressable pages from address zero including any memory holes and reserved memory regions 98 PVOID MmFindLocationForPageLookupTable(PFN_NUMBER TotalPageCount); // Returns the address for a memory chunk big enough to hold the page lookup table (starts search from end of memory) 99 VOID MmInitPageLookupTable(PVOID PageLookupTable, PFN_NUMBER TotalPageCount); // Inits the page lookup table according to the memory types in the memory map 100 VOID MmMarkPagesInLookupTable(PVOID PageLookupTable, PFN_NUMBER StartPage, PFN_NUMBER PageCount, TYPE_OF_MEMORY PageAllocated); // Marks the specified pages as allocated or free in the lookup table 101 VOID MmAllocatePagesInLookupTable(PVOID PageLookupTable, PFN_NUMBER StartPage, PFN_NUMBER PageCount, TYPE_OF_MEMORY MemoryType); // Allocates the specified pages in the lookup table 102 PFN_NUMBER MmCountFreePagesInLookupTable(PVOID PageLookupTable, PFN_NUMBER TotalPageCount); // Returns the number of free pages in the lookup table 103 PFN_NUMBER MmFindAvailablePages(PVOID PageLookupTable, PFN_NUMBER TotalPageCount, PFN_NUMBER PagesNeeded, BOOLEAN FromEnd); // Returns the page number of the first available page range from the beginning or end of memory 104 PFN_NUMBER MmFindAvailablePagesBeforePage(PVOID PageLookupTable, PFN_NUMBER TotalPageCount, PFN_NUMBER PagesNeeded, PFN_NUMBER LastPage); // Returns the page number of the first available page range before the specified page 105 VOID MmUpdateLastFreePageHint(PVOID PageLookupTable, PFN_NUMBER TotalPageCount); // Sets the LastFreePageHint to the last usable page of memory 106 BOOLEAN MmAreMemoryPagesAvailable(PVOID PageLookupTable, PFN_NUMBER TotalPageCount, PVOID PageAddress, PFN_NUMBER PageCount); // Returns TRUE if the specified pages of memory are available, otherwise FALSE 107 VOID MmSetMemoryType(PVOID MemoryAddress, SIZE_T MemorySize, TYPE_OF_MEMORY NewType); // Use with EXTREME caution! 108 109 PPAGE_LOOKUP_TABLE_ITEM MmGetMemoryMap(PFN_NUMBER *NoEntries); // Returns a pointer to the memory mapping table and a number of entries in it 110 111 112 //BOOLEAN MmInitializeMemoryManager(ULONG LowMemoryStart, ULONG LowMemoryLength); 113 BOOLEAN MmInitializeMemoryManager(VOID); 114 VOID MmInitializeHeap(PVOID PageLookupTable); 115 PVOID MmAllocateMemory(SIZE_T MemorySize); 116 PVOID MmAllocateMemoryWithType(SIZE_T MemorySize, TYPE_OF_MEMORY MemoryType); 117 VOID MmFreeMemory(PVOID MemoryPointer); 118 PVOID MmAllocateMemoryAtAddress(SIZE_T MemorySize, PVOID DesiredAddress, TYPE_OF_MEMORY MemoryType); 119 PVOID MmAllocateHighestMemoryBelowAddress(SIZE_T MemorySize, PVOID DesiredAddress, TYPE_OF_MEMORY MemoryType); 120 121 /* Heap */ 122 #define DEFAULT_HEAP_SIZE (1024 * 1024) 123 #define TEMP_HEAP_SIZE (32 * 1024 * 1024) 124 125 extern PVOID FrLdrDefaultHeap; 126 extern PVOID FrLdrTempHeap; 127 extern SIZE_T FrLdrImageSize; 128 129 PVOID 130 FrLdrHeapCreate( 131 SIZE_T MaximumSize, 132 TYPE_OF_MEMORY MemoryType); 133 134 VOID 135 FrLdrHeapDestroy( 136 PVOID HeapHandle); 137 138 VOID 139 FrLdrHeapRelease( 140 PVOID HeapHandle); 141 142 VOID 143 FrLdrHeapVerify( 144 PVOID HeapHandle); 145 146 VOID 147 FrLdrHeapCleanupAll(VOID); 148 149 PVOID 150 FrLdrHeapAllocateEx( 151 PVOID HeapHandle, 152 SIZE_T ByteSize, 153 ULONG Tag); 154 155 VOID 156 FrLdrHeapFreeEx( 157 PVOID HeapHandle, 158 PVOID Pointer, 159 ULONG Tag); 160 161 FORCEINLINE 162 PVOID 163 FrLdrHeapAlloc(SIZE_T MemorySize, ULONG Tag) 164 { 165 return FrLdrHeapAllocateEx(FrLdrDefaultHeap, MemorySize, Tag); 166 } 167 168 FORCEINLINE 169 VOID 170 FrLdrHeapFree(PVOID MemoryPointer, ULONG Tag) 171 { 172 FrLdrHeapFreeEx(FrLdrDefaultHeap, MemoryPointer, Tag); 173 } 174 175 FORCEINLINE 176 PVOID 177 FrLdrTempAlloc( 178 _In_ SIZE_T Size, 179 _In_ ULONG Tag) 180 { 181 return FrLdrHeapAllocateEx(FrLdrTempHeap, Size, Tag); 182 } 183 184 FORCEINLINE 185 VOID 186 FrLdrTempFree( 187 PVOID Allocation, ULONG Tag) 188 { 189 FrLdrHeapFreeEx(FrLdrTempHeap, Allocation, Tag); 190 } 191 192