Modified source engine (2017) developed by valve and leaked in 2020. Not for commercial purporses
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//--------------------
// PROGRAM: PEDUMP
// FILE: COMMON.C
// AUTHOR: Matt Pietrek - 1993
//--------------------
#include <windows.h>
#include <stdio.h>
#include <string.h>
#include "common.h"
PIMAGE_SYMBOL PCOFFSymbolTable = 0; // RVA to COFF symbol table (if present)
DWORD COFFSymbolCount = 0; // Number of symbols in COFF symbol table
typedef struct
{
WORD flag;
PSTR name;
} WORD_FLAG_DESCRIPTIONS;
typedef struct
{
DWORD flag;
PSTR name;
} DWORD_FLAG_DESCRIPTIONS;
// Bitfield values and names for the IMAGE_FILE_HEADER flags
WORD_FLAG_DESCRIPTIONS ImageFileHeaderCharacteristics[] =
{
{ IMAGE_FILE_RELOCS_STRIPPED, "RELOCS_STRIPPED" },
{ IMAGE_FILE_EXECUTABLE_IMAGE, "EXECUTABLE_IMAGE" },
{ IMAGE_FILE_LINE_NUMS_STRIPPED, "LINE_NUMS_STRIPPED" },
{ IMAGE_FILE_LOCAL_SYMS_STRIPPED, "LOCAL_SYMS_STRIPPED" },
{ IMAGE_FILE_MINIMAL_OBJECT, "MINIMAL_OBJECT" },
{ IMAGE_FILE_UPDATE_OBJECT, "UPDATE_OBJECT" },
{ IMAGE_FILE_16BIT_MACHINE, "16BIT_MACHINE" },
{ IMAGE_FILE_BYTES_REVERSED_LO, "BYTES_REVERSED_LO" },
{ IMAGE_FILE_32BIT_MACHINE, "32BIT_MACHINE" },
{ IMAGE_FILE_PATCH, "PATCH" },
{ IMAGE_FILE_SYSTEM, "SYSTEM" },
{ IMAGE_FILE_DLL, "DLL" },
{ IMAGE_FILE_BYTES_REVERSED_HI, "BYTES_REVERSED_HI" }
};
#define NUMBER_IMAGE_HEADER_FLAGS \
(sizeof(ImageFileHeaderCharacteristics) / sizeof(WORD_FLAG_DESCRIPTIONS))
//
// Dump the IMAGE_FILE_HEADER for a PE file or an OBJ
//
void DumpHeader(PIMAGE_FILE_HEADER pImageFileHeader)
{
UINT headerFieldWidth = 30;
UINT i;
char *szMachine;
printf("File Header\n");
switch( pImageFileHeader->Machine )
{
case IMAGE_FILE_MACHINE_I386: szMachine = "i386"; break;
case IMAGE_FILE_MACHINE_I860: szMachine = "i860"; break;
case IMAGE_FILE_MACHINE_R3000: szMachine = "R3000"; break;
case IMAGE_FILE_MACHINE_R4000: szMachine = "R4000"; break;
case IMAGE_FILE_MACHINE_ALPHA: szMachine = "alpha"; break;
default: szMachine = "unknown"; break;
}
printf(" %-*s%04X (%s)\n", headerFieldWidth, "Machine:",
pImageFileHeader->Machine, szMachine);
printf(" %-*s%04X\n", headerFieldWidth, "Number of Sections:",
pImageFileHeader->NumberOfSections);
printf(" %-*s%08X\n", headerFieldWidth, "TimeDateStamp:",
pImageFileHeader->TimeDateStamp);
printf(" %-*s%08X\n", headerFieldWidth, "PointerToSymbolTable:",
pImageFileHeader->PointerToSymbolTable);
printf(" %-*s%08X\n", headerFieldWidth, "NumberOfSymbols:",
pImageFileHeader->NumberOfSymbols);
printf(" %-*s%04X\n", headerFieldWidth, "SizeOfOptionalHeader:",
pImageFileHeader->SizeOfOptionalHeader);
printf(" %-*s%04X\n", headerFieldWidth, "Characteristics:",
pImageFileHeader->Characteristics);
for ( i=0; i < NUMBER_IMAGE_HEADER_FLAGS; i++ )
{
if ( pImageFileHeader->Characteristics &
ImageFileHeaderCharacteristics[i].flag )
printf( " %s\n", ImageFileHeaderCharacteristics[i].name );
}
}
// Bitfield values and names for the DllCharacteritics flags
WORD_FLAG_DESCRIPTIONS DllCharacteristics[] =
{
{ IMAGE_LIBRARY_PROCESS_INIT, "PROCESS_INIT" },
{ IMAGE_LIBRARY_PROCESS_TERM, "PROCESS_TERM" },
{ IMAGE_LIBRARY_THREAD_INIT, "THREAD_INIT" },
{ IMAGE_LIBRARY_THREAD_TERM, "THREAD_TERM" },
};
#define NUMBER_DLL_CHARACTERISTICS \
(sizeof(DllCharacteristics) / sizeof(WORD_FLAG_DESCRIPTIONS))
// Bitfield values and names for the LoaderFlags flags
DWORD_FLAG_DESCRIPTIONS LoaderFlags[] =
{
{ IMAGE_LOADER_FLAGS_BREAK_ON_LOAD, "BREAK_ON_LOAD" },
{ IMAGE_LOADER_FLAGS_DEBUG_ON_LOAD, "DEBUG_ON_LOAD" }
};
#define NUMBER_LOADER_FLAGS \
(sizeof(LoaderFlags) / sizeof(DWORD_FLAG_DESCRIPTIONS))
// Names of the data directory elements that are defined
char *ImageDirectoryNames[] = {
"EXPORT", "IMPORT", "RESOURCE", "EXCEPTION", "SECURITY", "BASERELOC",
"DEBUG", "COPYRIGHT", "GLOBALPTR", "TLS", "LOAD_CONFIG" };
#define NUMBER_IMAGE_DIRECTORY_ENTRYS \
(sizeof(ImageDirectoryNames)/sizeof(char *))
//
// Dump the IMAGE_OPTIONAL_HEADER from a PE file
//
void DumpOptionalHeader(PIMAGE_OPTIONAL_HEADER optionalHeader)
{
UINT width = 30;
char *s;
UINT i;
printf("Optional Header\n");
printf(" %-*s%04X\n", width, "Magic", optionalHeader->Magic);
printf(" %-*s%u.%02u\n", width, "linker version",
optionalHeader->MajorLinkerVersion,
optionalHeader->MinorLinkerVersion);
printf(" %-*s%X\n", width, "size of code", optionalHeader->SizeOfCode);
printf(" %-*s%X\n", width, "size of initialized data",
optionalHeader->SizeOfInitializedData);
printf(" %-*s%X\n", width, "size of uninitialized data",
optionalHeader->SizeOfUninitializedData);
printf(" %-*s%X\n", width, "entrypoint RVA",
optionalHeader->AddressOfEntryPoint);
printf(" %-*s%X\n", width, "base of code", optionalHeader->BaseOfCode);
printf(" %-*s%X\n", width, "base of data", optionalHeader->BaseOfData);
printf(" %-*s%X\n", width, "image base", optionalHeader->ImageBase);
printf(" %-*s%X\n", width, "section align",
optionalHeader->SectionAlignment);
printf(" %-*s%X\n", width, "file align", optionalHeader->FileAlignment);
printf(" %-*s%u.%02u\n", width, "required OS version",
optionalHeader->MajorOperatingSystemVersion,
optionalHeader->MinorOperatingSystemVersion);
printf(" %-*s%u.%02u\n", width, "image version",
optionalHeader->MajorImageVersion,
optionalHeader->MinorImageVersion);
printf(" %-*s%u.%02u\n", width, "subsystem version",
optionalHeader->MajorSubsystemVersion,
optionalHeader->MinorSubsystemVersion);
printf(" %-*s%X\n", width, "Reserved1", optionalHeader->Reserved1);
printf(" %-*s%X\n", width, "size of image", optionalHeader->SizeOfImage);
printf(" %-*s%X\n", width, "size of headers",
optionalHeader->SizeOfHeaders);
printf(" %-*s%X\n", width, "checksum", optionalHeader->CheckSum);
switch( optionalHeader->Subsystem )
{
case IMAGE_SUBSYSTEM_NATIVE: s = "Native"; break;
case IMAGE_SUBSYSTEM_WINDOWS_GUI: s = "Windows GUI"; break;
case IMAGE_SUBSYSTEM_WINDOWS_CUI: s = "Windows character"; break;
case IMAGE_SUBSYSTEM_OS2_CUI: s = "OS/2 character"; break;
case IMAGE_SUBSYSTEM_POSIX_CUI: s = "Posix character"; break;
default: s = "unknown";
}
printf(" %-*s%04X (%s)\n", width, "Subsystem",
optionalHeader->Subsystem, s);
printf(" %-*s%04X\n", width, "DLL flags",
optionalHeader->DllCharacteristics);
for ( i=0; i < NUMBER_DLL_CHARACTERISTICS; i++ )
{
if ( optionalHeader->DllCharacteristics &
DllCharacteristics[i].flag )
printf( " %s", DllCharacteristics[i].name );
}
if ( optionalHeader->DllCharacteristics )
printf("\n");
printf(" %-*s%X\n", width, "stack reserve size",
optionalHeader->SizeOfStackReserve);
printf(" %-*s%X\n", width, "stack commit size",
optionalHeader->SizeOfStackCommit);
printf(" %-*s%X\n", width, "heap reserve size",
optionalHeader->SizeOfHeapReserve);
printf(" %-*s%X\n", width, "heap commit size",
optionalHeader->SizeOfHeapCommit);
printf(" %-*s%08X\n", width, "loader flags",
optionalHeader->LoaderFlags);
for ( i=0; i < NUMBER_LOADER_FLAGS; i++ )
{
if ( optionalHeader->LoaderFlags &
LoaderFlags[i].flag )
printf( " %s", LoaderFlags[i].name );
}
if ( optionalHeader->LoaderFlags )
printf("\n");
printf(" %-*s%X\n", width, "RVAs & sizes",
optionalHeader->NumberOfRvaAndSizes);
printf("\nData Directory\n");
for ( i=0; i < optionalHeader->NumberOfRvaAndSizes; i++)
{
printf( " %-12s rva: %08X size: %08X\n",
(i >= NUMBER_IMAGE_DIRECTORY_ENTRYS)
? "unused" : ImageDirectoryNames[i],
optionalHeader->DataDirectory[i].VirtualAddress,
optionalHeader->DataDirectory[i].Size);
}
}
// Bitfield values and names for the IMAGE_SECTION_HEADER flags
DWORD_FLAG_DESCRIPTIONS SectionCharacteristics[] =
{
{ IMAGE_SCN_CNT_CODE, "CODE" },
{ IMAGE_SCN_CNT_INITIALIZED_DATA, "INITIALIZED_DATA" },
{ IMAGE_SCN_CNT_UNINITIALIZED_DATA, "UNINITIALIZED_DATA" },
{ IMAGE_SCN_LNK_INFO, "LNK_INFO" },
{ IMAGE_SCN_LNK_OVERLAY, "LNK_OVERLAY" },
{ IMAGE_SCN_LNK_REMOVE, "LNK_REMOVE" },
{ IMAGE_SCN_LNK_COMDAT, "LNK_COMDAT" },
{ IMAGE_SCN_MEM_DISCARDABLE, "MEM_DISCARDABLE" },
{ IMAGE_SCN_MEM_NOT_CACHED, "MEM_NOT_CACHED" },
{ IMAGE_SCN_MEM_NOT_PAGED, "MEM_NOT_PAGED" },
{ IMAGE_SCN_MEM_SHARED, "MEM_SHARED" },
{ IMAGE_SCN_MEM_EXECUTE, "MEM_EXECUTE" },
{ IMAGE_SCN_MEM_READ, "MEM_READ" },
{ IMAGE_SCN_MEM_WRITE, "MEM_WRITE" },
};
#define NUMBER_SECTION_CHARACTERISTICS \
(sizeof(SectionCharacteristics) / sizeof(DWORD_FLAG_DESCRIPTIONS))
//
// Dump the section table from a PE file or an OBJ
//
void DumpSectionTable(PIMAGE_SECTION_HEADER section,
unsigned cSections,
BOOL IsEXE)
{
unsigned i, j;
printf("Section Table\n");
for ( i=1; i <= cSections; i++, section++ )
{
printf( " %02X %-8.8s %s: %08X VirtAddr: %08X\n",
i, section->Name,
IsEXE ? "VirtSize" : "PhysAddr",
section->Misc.VirtualSize, section->VirtualAddress);
printf( " raw data offs: %08X raw data size: %08X\n",
section->PointerToRawData, section->SizeOfRawData );
printf( " relocation offs: %08X relocations: %08X\n",
section->PointerToRelocations, section->NumberOfRelocations );
printf( " line # offs: %08X line #'s: %08X\n",
section->PointerToLinenumbers, section->NumberOfLinenumbers );
printf( " characteristics: %08X\n", section->Characteristics);
printf(" ");
for ( j=0; j < NUMBER_SECTION_CHARACTERISTICS; j++ )
{
if ( section->Characteristics &
SectionCharacteristics[j].flag )
printf( " %s", SectionCharacteristics[j].name );
}
printf("\n\n");
}
}
//
// Used by the DumpSymbolTable() routine. It purpose is to filter out
// the non-normal section numbers and give them meaningful names.
//
void GetSectionName(WORD section, PSTR buffer, unsigned cbBuffer)
{
char tempbuffer[10];
switch ( (SHORT)section )
{
case IMAGE_SYM_UNDEFINED: strcpy(tempbuffer, "UNDEF"); break;
case IMAGE_SYM_ABSOLUTE: strcpy(tempbuffer, "ABS "); break;
case IMAGE_SYM_DEBUG: strcpy(tempbuffer, "DEBUG"); break;
default: wsprintf(tempbuffer, "%-5X", section);
}
strncpy(buffer, tempbuffer, cbBuffer-1);
}
// The names of the first group of possible symbol table storage classes
char * SzStorageClass1[] = {
"NULL","AUTOMATIC","EXTERNAL","STATIC","REGISTER","EXTERNAL_DEF","LABEL",
"UNDEFINED_LABEL","MEMBER_OF_STRUCT","ARGUMENT","STRUCT_TAG",
"MEMBER_OF_UNION","UNION_TAG","TYPE_DEFINITION","UNDEFINED_STATIC",
"ENUM_TAG","MEMBER_OF_ENUM","REGISTER_PARAM","BIT_FIELD"
};
// The names of the second group of possible symbol table storage classes
char * SzStorageClass2[] = {
"BLOCK","FUNCTION","END_OF_STRUCT","FILE","SECTION","WEAK_EXTERNAL"
};
//
// Given a symbol storage class value, return a descriptive ASCII string
//
PSTR GetSZStorageClass(BYTE storageClass)
{
if ( storageClass <= IMAGE_SYM_CLASS_BIT_FIELD )
return SzStorageClass1[storageClass];
else if ( (storageClass >= IMAGE_SYM_CLASS_BLOCK)
&& (storageClass <= IMAGE_SYM_CLASS_WEAK_EXTERNAL) )
return SzStorageClass2[storageClass-IMAGE_SYM_CLASS_BLOCK];
else
return "???";
}
//
// Dumps the auxillary symbol for a regular symbol. It takes a pointer
// to the regular symbol, since the routine needs the information in
// that record.
//
void DumpAuxSymbols(PIMAGE_SYMBOL pSymbolTable)
{
PIMAGE_AUX_SYMBOL auxSym;
auxSym = (PIMAGE_AUX_SYMBOL)(pSymbolTable+1);
if ( pSymbolTable->StorageClass == IMAGE_SYM_CLASS_FILE )
printf(" * %s\n", auxSym);
else if ( (pSymbolTable->StorageClass == IMAGE_SYM_CLASS_EXTERNAL) )
{
if ( (pSymbolTable->Type & 0xF0) == (IMAGE_SYM_DTYPE_FUNCTION << 4))
{
printf(" * tag: %04X size: %04X Line #'s: %08X next fn: %04X\n",
auxSym->Sym.TagIndex, auxSym->Sym.Misc.TotalSize,
auxSym->Sym.FcnAry.Function.PointerToLinenumber,
auxSym->Sym.FcnAry.Function.PointerToNextFunction);
}
}
else if ( (pSymbolTable->StorageClass == IMAGE_SYM_CLASS_STATIC) )
{
printf(
" * Section: %04X Len: %05X Relocs: %04X LineNums: %04X\n",
auxSym->Section.Number, auxSym->Section.Length,
auxSym->Section.NumberOfRelocations,
auxSym->Section.NumberOfLinenumbers);
}
}
//
// Given a COFF symbol table index, look up its name. This function assumes
// that the COFFSymbolCount and PCOFFSymbolTable variables have been already
// set up.
//
BOOL LookupSymbolName(DWORD index, PSTR buffer, UINT length)
{
PSTR stringTable;
if ( index >= COFFSymbolCount )
return FALSE;
if ( PCOFFSymbolTable == 0 )
return FALSE;
if ( PCOFFSymbolTable[index].N.Name.Short != 0 )
{
strncpy(buffer, PCOFFSymbolTable[index].N.ShortName, min(8,length));
buffer[8] = 0;
}
else
{
stringTable = (PSTR)&PCOFFSymbolTable[COFFSymbolCount];
strncpy(buffer,
stringTable + PCOFFSymbolTable[index].N.Name.Long, length);
buffer[length-1] = 0;
}
return TRUE;
}
//
// Dumps a COFF symbol table from an EXE or OBJ
//
void DumpSymbolTable(PIMAGE_SYMBOL pSymbolTable, unsigned cSymbols)
{
unsigned i;
PSTR stringTable;
char sectionName[10];
printf("Symbol Table - %X entries (* = auxillary symbol)\n", cSymbols);
printf(
"Indx Name Value Section cAux Type Storage\n"
"---- -------------------- -------- ---------- ----- ------- --------\n");
// The string table apparently starts right after the symbol table
stringTable = (PSTR)&pSymbolTable[cSymbols];
for ( i=0; i < cSymbols; i++ )
{
printf("%04X ", i);
if ( pSymbolTable->N.Name.Short != 0 )
printf("%-20.8s", pSymbolTable->N.ShortName);
else
printf("%-20s", stringTable + pSymbolTable->N.Name.Long);
printf(" %08X", pSymbolTable->Value);
GetSectionName(pSymbolTable->SectionNumber, sectionName,
sizeof(sectionName));
printf(" sect:%s aux:%X type:%02X st:%s\n",
sectionName,
pSymbolTable->NumberOfAuxSymbols,
pSymbolTable->Type,
GetSZStorageClass(pSymbolTable->StorageClass) );
if ( pSymbolTable->NumberOfAuxSymbols )
DumpAuxSymbols(pSymbolTable);
// Take into account any aux symbols
i += pSymbolTable->NumberOfAuxSymbols;
pSymbolTable += pSymbolTable->NumberOfAuxSymbols;
pSymbolTable++;
}
}
//
// Given a section name, look it up in the section table and return a
// pointer to the start of its raw data area.
//
LPVOID GetSectionPtr(PSTR name, PIMAGE_NT_HEADERS pNTHeader, DWORD imageBase)
{
PIMAGE_SECTION_HEADER section;
unsigned i;
section = (PIMAGE_SECTION_HEADER)(pNTHeader+1);
for ( i=0; i < pNTHeader->FileHeader.NumberOfSections; i++, section++ )
{
if ( strnicmp(section->Name, name, IMAGE_SIZEOF_SHORT_NAME) == 0 )
return (LPVOID)(section->PointerToRawData + imageBase);
}
return 0;
}
//
// Given a section name, look it up in the section table and return a
// pointer to its IMAGE_SECTION_HEADER
//
PIMAGE_SECTION_HEADER GetSectionHeader(PSTR name, PIMAGE_NT_HEADERS pNTHeader)
{
PIMAGE_SECTION_HEADER section;
unsigned i;
section = (PIMAGE_SECTION_HEADER)(pNTHeader+1);
for ( i=0; i < pNTHeader->FileHeader.NumberOfSections; i++, section++ )
{
if ( strnicmp(section->Name, name, IMAGE_SIZEOF_SHORT_NAME) == 0 )
return section;
}
return 0;
}
//
// Do a hexadecimal dump of the raw data for all the sections. You
// could just dump one section by adjusting the PIMAGE_SECTION_HEADER
// and cSections parameters
//
void DumpRawSectionData(PIMAGE_SECTION_HEADER section,
PVOID base,
unsigned cSections)
{
unsigned i;
char name[IMAGE_SIZEOF_SHORT_NAME + 1];
printf("Section Hex Dumps\n");
for ( i=0; i < cSections; i++, section++ )
{
// Make a copy of the section name so that we can ensure that
// it's null-terminated
memcpy(name, section->Name, IMAGE_SIZEOF_SHORT_NAME);
name[IMAGE_SIZEOF_SHORT_NAME] = 0;
// Don't dump sections that don't exist in the file!
if ( section->PointerToRawData == 0 )
continue;
printf( "section %02X (%s) size: %08X file offs: %08X\n",
i, name, section->SizeOfRawData, section->PointerToRawData);
HexDump( MakePtr(PBYTE, base, section->PointerToRawData),
section->SizeOfRawData );
printf("\n");
}
}
//
// Dump a range of line numbers from the COFF debug information
//
void DumpLineNumbers(PIMAGE_LINENUMBER pln, DWORD count)
{
char buffer[64];
DWORD i;
printf("Line Numbers\n");
for (i=0; i < count; i++)
{
if ( pln->Linenumber == 0 ) // A symbol table index
{
buffer[0] = 0;
LookupSymbolName(pln->Type.SymbolTableIndex, buffer,
sizeof(buffer));
printf("SymIndex: %X (%s)\n", pln->Type.SymbolTableIndex,
buffer);
}
else // A regular line number
printf(" Addr: %05X Line: %04X\n",
pln->Type.VirtualAddress, pln->Linenumber);
pln++;
}
}
// Number of hex values displayed per line
#define HEX_DUMP_WIDTH 16
//
// Dump a region of memory in a hexadecimal format
//
void HexDump(PBYTE ptr, DWORD length)
{
char buffer[256];
PSTR buffPtr;
unsigned cOutput, i;
DWORD bytesToGo=length;
while ( bytesToGo )
{
cOutput = bytesToGo >= HEX_DUMP_WIDTH ? HEX_DUMP_WIDTH : bytesToGo;
buffPtr = buffer;
buffPtr += wsprintf(buffPtr, "%08X: ", length-bytesToGo );
for ( i=0; i < HEX_DUMP_WIDTH; i++ )
{
buffPtr += wsprintf(buffPtr,
i < cOutput ? "%02X " : " ",
*(ptr+i) );
// Put an extra space between the 1st and 2nd half of the bytes
// on each line.
if ( i == (HEX_DUMP_WIDTH/2)-1 )
buffPtr += wsprintf(buffPtr, " ");
}
for ( i=0; i < cOutput; i++ )
{
char c;
c = '.';
if ( isascii(*(ptr + i)) )
c = isprint(*(ptr + i)) ? *(ptr + i) : '.';
buffPtr += wsprintf(buffPtr, "%c", c);
}
puts(buffer); // Can't use printf(), since there may be a '%'
// in the string.
bytesToGo -= cOutput;
ptr += HEX_DUMP_WIDTH;
}
}