| 1 | /* $Id: pe2lx.h,v 1.6 1999-11-10 01:45:33 bird Exp $
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| 2 | *
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| 3 | * Pe2Lx class declarations. Ring 0 and Ring 3
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| 4 | *
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| 5 | * Copyright (c) 1998-1999 knut st. osmundsen (knut.stange.osmundsen@pmsc.no)
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| 6 | * Copyright (c) 1998 Sander van Leeuwen (sandervl@xs4all.nl)
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| 7 | * Copyright (c) 1998 Peter Fitzsimmons
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| 8 | *
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| 9 | * Project Odin Software License can be found in LICENSE.TXT
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| 10 | *
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| 11 | */
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| 12 | #ifndef _PE2LX_H_
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| 13 | #define _PE2LX_H_
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| 14 |
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| 15 |
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| 16 | /*******************************************************************************
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| 17 | * Defined Constants And Macros *
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| 18 | *******************************************************************************/
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| 19 | /*
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| 20 | * BufferedRVAReader config
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| 21 | */
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| 22 | #define BUFFEREDRVAREADER_BUFFERSIZE PAGESIZE /* reader code assumes this size... */
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| 23 |
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| 24 |
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| 25 |
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| 26 | /*******************************************************************************
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| 27 | * Structures and Typedefs *
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| 28 | *******************************************************************************/
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| 29 | /**
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| 30 | * LXObject is use to store objects in the virtual LX file.
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| 31 | */
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| 32 | typedef struct LXObject
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| 33 | {
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| 34 | ULONG ulRVA; /* Object relative virtual address */
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| 35 | ULONG cbPhysical; /* Physical size */
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| 36 | ULONG cbVirtual; /* Virtual size */
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| 37 | ULONG flFlags; /* LX flags! */
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| 38 | struct
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| 39 | {
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| 40 | ULONG offTIBFix : 30; /* TIBfix offset (from the object start) */
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| 41 | ULONG fTIBFixObject : 1;/* Set: The object contains the tibfix. Clear: not tib fix object. */
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| 42 | ULONG fStackObject : 1; /* Set: The object is the stack object. Clear: not the stack object. */
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| 43 | } Misc;
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| 44 | ULONG offPEFile; /* section offset into real PE file. */
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| 45 | ULONG offLXFile; /* object offset into virtual LX file. */
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| 46 | } LXOBJECT, *PLXOBJECT;
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| 47 | typedef const LXOBJECT *PCLXOBJECT;
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| 48 |
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| 49 |
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| 50 |
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| 51 | /**
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| 52 | * Pe2Lx class. Reads a PE executable image and creates a virtual LX file which
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| 53 | * can be read from and (RING3) dumped to file.
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| 54 | *
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| 55 | * @author knut st. osmundsen
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| 56 | * @approval knut st. osmundsen
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| 57 | */
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| 58 | class Pe2Lx : public ModuleBase
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| 59 | {
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| 60 | public:
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| 61 | /** @cat Constructor/Destructor */
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| 62 | Pe2Lx(SFN hFile);
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| 63 | ~Pe2Lx();
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| 64 |
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| 65 | /** @cat Public Main methods */
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| 66 | ULONG init(PCSZ pszFilename);
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| 67 | ULONG read(ULONG offLXFile, PVOID pvBuffer, ULONG cbToRead, ULONG flFlags, PMTE pMTE);
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| 68 | #ifndef RING0
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| 69 | ULONG writeLxFile(PCSZ pszLXFilename);
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| 70 | #endif
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| 71 |
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| 72 | /** @cat public Helper methods */
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| 73 | ULONG querySizeOfLxFile();
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| 74 | VOID dumpVirtualLxFile();
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| 75 |
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| 76 | private:
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| 77 | /** @cat conversion methods */
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| 78 | ULONG makeObjectTable();
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| 79 | ULONG makeObjectPageTable();
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| 80 | ULONG makeFixups();
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| 81 | ULONG makeExports();
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| 82 |
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| 83 | /** @cat conversion helper(s) */
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| 84 | ULONG loadNtHeaders();
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| 85 | VOID releaseNtHeaders();
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| 86 |
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| 87 | /** @cat init() helper methods - may only be called at init time! */
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| 88 | ULONG addObject(ULONG ulRVA, ULONG cbPhysical, ULONG cbVirtual, ULONG flFlags, ULONG offPEFile);
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| 89 | ULONG addTIBFixObject();
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| 90 | ULONG addStackObject(ULONG cbStack);
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| 91 |
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| 92 | /** @cat PE helper methods */
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| 93 |
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| 94 | /** @cat Fixups Helpers - calls allowed from makeFixups only! */
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| 95 | ULONG initFixups();
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| 96 | ULONG addPageFixupEntry(BOOL fLast = FALSE);
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| 97 | ULONG add32OffsetFixup(WORD offSource, ULONG ulTarget);
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| 98 | ULONG add32OrdImportFixup(WORD offSource, ULONG ulModuleOrdinal, ULONG ulFunctionOrdinal);
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| 99 | ULONG add32NameImportFixup(WORD offSource, ULONG ulModuleOrdinal, PCSZ pszFnName);
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| 100 | ULONG addModule(PCSZ pszModuleName, PULONG pulModuleOrdinal);
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| 101 | ULONG addImportFunctionName(PCSZ pszFnName, PULONG poffFnName);
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| 102 | VOID finalizeFixups();
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| 103 | VOID finalizeImportNames();
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| 104 |
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| 105 | /** @cat Entry table / Resident nametable helpers */
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| 106 | ULONG initEntry();
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| 107 | ULONG addResName(ULONG ulOrdinal, PCSZ pszName, ULONG cchName);
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| 108 | ULONG addEntry(ULONG ulOrdinal, ULONG ulRVA);
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| 109 | ULONG addForwarderEntry(ULONG ulOrdinal, PCSZ pszDllName, PCSZ pszFnNameOrOrd);
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| 110 | ULONG addLastEntry();
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| 111 | VOID finalizeExports();
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| 112 |
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| 113 | /** @cat Misc helpers */
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| 114 | ULONG getCountOfPages();
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| 115 | ULONG queryObjectAndOffset(ULONG ulRVA, PULONG pulObject, PULONG poffObject);
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| 116 |
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| 117 | /** @cat static helpers */
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| 118 | static PCSZ queryOdin32ModuleName(PCSZ pszWin32ModuleName);
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| 119 |
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| 120 | /** @cat static dump methods */
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| 121 | static VOID dumpNtHeaders(PIMAGE_NT_HEADERS pNtHdrs);
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| 122 | static VOID dumpSectionHeader(PIMAGE_SECTION_HEADER pSection);
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| 123 |
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| 124 | private:
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| 125 | /** @cat private data members - allways present. */
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| 126 | BOOL fAllInOneObject; /* The All-in-object fix will be or is applied. */
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| 127 | PLXOBJECT paObjects; /* Pointer to object array. */
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| 128 | USHORT cObjects; /* Count of elements in the object array. */
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| 129 | USHORT cObjectsAllocated; /* Size of the object array. */
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| 130 |
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| 131 | /**
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| 132 | * @cat LX structures
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| 133 | */
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| 134 | struct e32_exe LXHdr; /* Lxheader */
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| 135 |
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| 136 | struct o32_obj *paObjTab; /* Pointer to object table - if null check cObjects > 0 and generate it using makeObjectTable */
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| 137 | struct o32_map *paObjPageTab; /* Pointer to object page table - if null check cObjects > 0 and generate it using makeObjectPageTable */
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| 138 |
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| 139 | PCHAR pachResNameTable; /* Pointer to resident name table. */
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| 140 | ULONG offCurResName; /* Offset of the next entry in the resident name table. */
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| 141 | ULONG cchRNTAllocated; /* Count of char allocated for the resident name table. */
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| 142 |
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| 143 | struct b32_bundle *pEntryBundles; /* Pointer to entry bundles. (exports) */
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| 144 | ULONG offCurEntryBundle; /* Offset of the next bundle. */
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| 145 | ULONG offLastEntryBundle; /* Offset of the last entry bundle. */
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| 146 | ULONG ulLastOrdinal; /* Ordinal number of last entry which was added. */
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| 147 | ULONG cbEBAllocated; /* Count of bytes allocate for entry bundles. */
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| 148 | BOOL fForwarders; /* Set if forwarders are present. */
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| 149 |
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| 150 | PULONG paulFixupPageTable; /* Pointer to fixup pagetable. If null generate it using makeFixups. */
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| 151 | ULONG cFixupPTEntries; /* Number of entries in the fixup page table. */
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| 152 | ULONG cFPTEAllocated; /* Number of page table entries allocated. */
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| 153 |
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| 154 | PVOID pFixupRecords; /* Pointer to fixup records. If null generate it using makeFixups. */
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| 155 | ULONG offCurFixupRec; /* Offset of next fixup. */
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| 156 | ULONG cbFRAllocated; /* Count of bytes allocated for Fixup records. */
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| 157 |
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| 158 | PVOID pvCrossPageFixup; /* Pointer to cross page fixup. */
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| 159 | ULONG cbCrossPageFixup; /* Fixup size in bytes. */
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| 160 |
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| 161 | PCHAR pachImpModuleNames; /* Pointer to list of module names. */
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| 162 | ULONG offCurImpModuleName; /* Offset of next modulename. */
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| 163 | ULONG cchIMNAllocated; /* Count of chars allocated for pachImpModuleNames. */
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| 164 |
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| 165 | PCHAR pachImpFunctionNames; /* Pointer to list of function names. */
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| 166 | ULONG offCurImpFunctionName; /* Offset of next functionname. */
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| 167 | ULONG cchIFNAllocated; /* Count of chars allocated for pachImpFunctionNames. */
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| 168 |
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| 169 | /**
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| 170 | * @cat PE structues
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| 171 | */
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| 172 | ULONG offNtHeaders; /* Fileoffset of the PE\0\0 signature. */
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| 173 | PIMAGE_NT_HEADERS pNtHdrs; /* Pointer to NT-Headers. If null load it using loadNtHeaders. */
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| 174 | ULONG ulImageBase; /* Image base address. */
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| 175 |
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| 176 | /**
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| 177 | * @cat static data.
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| 178 | */
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| 179 | static struct LieListEntry /* Dll Name lie table. */
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| 180 | {
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| 181 | PCSZ pszWin32Name; /* Win32 dll name. */
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| 182 | PCSZ pszOdin32Name; /* Odin32 dll name. */
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| 183 | } paLieList[];
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| 184 |
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| 185 | static struct PeCharacteristicsToLxFlags/* section characteristics to object flags */
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| 186 | {
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| 187 | unsigned int Characteristics; /* set of section characteristics */
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| 188 | ULONG flFlags; /* equivalent object flags */
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| 189 | } paSecChars2Flags[];
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| 190 | };
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| 191 |
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| 192 |
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| 193 | /**
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| 194 | * BufferedRVARead - read at RVA with buffering.
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| 195 | * @author knut st. osmundsen
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| 196 | * @approval knut st. osmundsen
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| 197 | */
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| 198 | class BufferedRVARead
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| 199 | {
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| 200 | public:
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| 201 | BufferedRVARead(SFN hFile, ULONG cObjects, PCLXOBJECT paObjects);
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| 202 | #if 0
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| 203 | ULONG readAtRVA(ULONG ulRVA, PVOID pvBuffer, ULONG cbBuffer)
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| 204 | #else
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| 205 | /**
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| 206 | * Reads a chunk of data at the spcified RVA.
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| 207 | * @returns NO_ERROR on success.
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| 208 | * ERROR_INVALID_PARAMETER
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| 209 | * <Whatever rc ReadAt returns>
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| 210 | * @param ulRVA RVA to read from. Within the filesize.
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| 211 | * @param pvBuffer Pointer to output buffer. pvBuffer > 64KB
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| 212 | * @param cbBuffer Number of bytes to read. 0 < cbBuffer > 256MB
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| 213 | * @status completely
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| 214 | * @author knut st. osmundsen
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| 215 | */
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| 216 | inline ULONG readAtRVA(ULONG ulRVA, PVOID pvBuffer, ULONG cbBuffer)
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| 217 | {
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| 218 | /*
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| 219 | * five cases:
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| 220 | * 1) entire area is within the buffer.
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| 221 | * 2) start of area is within the buffer.
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| 222 | * 3) end of area is within the buffer.
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| 223 | * 4) the area is larger than the buffer, covering it.
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| 224 | * 5) the area is outside the buffer.
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| 225 | *
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| 226 | * these are optimal: 1, 2, and 5.
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| 227 | * The request is allways process from start to end. This will make case 3 and 4 less effecient.
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| 228 | */
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| 229 | #ifdef DEBUG
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| 230 | if (ulRVA == ~0UL || (ULONG)pvBuffer < 0x10000UL || cbBuffer == 0UL || cbBuffer >= 0x10000000UL)
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| 231 | return ERROR_INVALID_PARAMETER;
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| 232 | #endif
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| 233 |
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| 234 | do
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| 235 | {
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| 236 | if (ulRVA >= this->ulRVA && ulRVA < this->ulRVA + sizeof(achBuffer))
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| 237 | { /* in buffer */
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| 238 | register ULONG cbRead = sizeof(achBuffer) - (ulRVA - this->ulRVA);
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| 239 | cbRead = min(cbRead, cbBuffer);
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| 240 | memcpy(pvBuffer, &achBuffer[ulRVA - this->ulRVA], (size_t)cbRead);
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| 241 | if (cbBuffer == cbRead)
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| 242 | return NO_ERROR;
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| 243 | cbBuffer -= cbRead;
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| 244 | pvBuffer = (PVOID)((ULONG)pvBuffer + cbRead);
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| 245 | ulRVA += cbRead;
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| 246 | }
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| 247 | else
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| 248 | { /* not in buffer, then read it into the buffer! */
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| 249 | APIRET rc = readToBuffer(ulRVA);
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| 250 | if (rc != NO_ERROR)
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| 251 | return rc;
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| 252 | }
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| 253 | } while (cbBuffer != 0UL);
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| 254 |
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| 255 | return NO_ERROR;
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| 256 | }
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| 257 | #endif
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| 258 |
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| 259 | ULONG dupString(ULONG ulRVA, PSZ *ppsz);
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| 260 | BufferedRVARead & operator =(BufferedRVARead &SrcObj);
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| 261 |
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| 262 | private:
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| 263 | ULONG readToBuffer(ULONG ulRVA);
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| 264 |
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| 265 | private:
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| 266 | SFN hFile; /* Filehandle. */
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| 267 | ULONG cObjects; /* Count of objects */
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| 268 | PCLXOBJECT paObjects; /* Pointer to a readonly array of objects. */
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| 269 | ULONG ulRVA; /* RVA for the buffer start */
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| 270 | CHAR achBuffer[BUFFEREDRVAREADER_BUFFERSIZE]; /* Buffer. NOTE! Code assumes that it is a page. */
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| 271 | };
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| 272 |
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| 273 | #endif
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