objdump.c

Windows 95 系統程式設計大奧秘书籍源码

//==================================
// PEDUMP - Matt Pietrek 1995
// FILE: OBJDUMP.C
//==================================

#include <windows.h>
#include <stdio.h>
#include "common.h"
#include "extrnvar.h"

typedef struct _i386RelocTypes
{
    WORD type;
    PSTR name;
} i386RelocTypes;

// ASCII names for the various relocations used in i386 COFF OBJs
i386RelocTypes i386Relocations[] = 
{
{ IMAGE_REL_I386_ABSOLUTE, "ABSOLUTE" },
{ IMAGE_REL_I386_DIR16, "DIR16" },
{ IMAGE_REL_I386_REL16, "REL16" },
{ IMAGE_REL_I386_DIR32, "DIR32" },
{ IMAGE_REL_I386_DIR32NB, "DIR32NB" },
{ IMAGE_REL_I386_SEG12, "SEG12" },
{ IMAGE_REL_I386_SECTION, "SECTION" },
{ IMAGE_REL_I386_SECREL, "SECREL" },
{ IMAGE_REL_I386_REL32, "REL32" }
};
#define I386RELOCTYPECOUNT (sizeof(i386Relocations) / sizeof(i386RelocTypes))

//
// Given an i386 OBJ relocation type, return its ASCII name in a buffer
//
void GetObjRelocationName(WORD type, PSTR buffer, DWORD cBytes)
{
    DWORD i;
    
    for ( i=0; i < I386RELOCTYPECOUNT; i++ )
        if ( type == i386Relocations[i].type )
        {
            strncpy(buffer, i386Relocations[i].name, cBytes);
            return;
        }
        
    sprintf( buffer, "???_%X", type);
}

//
// Dump the relocation table for one COFF section
//
void DumpObjRelocations(PIMAGE_RELOCATION pRelocs, DWORD count)
{
    DWORD i;
    char szTypeName[32];
    
    for ( i=0; i < count; i++ )
    {
        GetObjRelocationName(pRelocs->Type, szTypeName, sizeof(szTypeName));
        printf("  Address: %08X  SymIndex: %08X  Type: %s\n",
                pRelocs->VirtualAddress, pRelocs->SymbolTableIndex,
                szTypeName);
        pRelocs++;
    }
}

//
// top level routine called from PEDUMP.C to dump the components of a
// COFF OBJ file.
//
void DumpObjFile( PIMAGE_FILE_HEADER pImageFileHeader )
{
    unsigned i;
    PIMAGE_SECTION_HEADER pSections;
    
    DumpHeader(pImageFileHeader);
    printf("\n");

    pSections = MakePtr(PIMAGE_SECTION_HEADER, (pImageFileHeader+1),
                            pImageFileHeader->SizeOfOptionalHeader);

    DumpSectionTable(pSections, pImageFileHeader->NumberOfSections, FALSE);
    printf("\n");

    if ( fShowRelocations )
    {
        for ( i=0; i < pImageFileHeader->NumberOfSections; i++ )
        {
            if ( pSections[i].PointerToRelocations == 0 )
                continue;
        
            printf("Section %02X (%.8s) relocations\n", i, pSections[i].Name);
            DumpObjRelocations( MakePtr(PIMAGE_RELOCATION, pImageFileHeader,
                                    pSections[i].PointerToRelocations),
                                pSections[i].NumberOfRelocations );
            printf("\n");
        }
    }
    
    PCOFFSymbolTable = MakePtr(PIMAGE_SYMBOL, pImageFileHeader,
                                pImageFileHeader->PointerToSymbolTable);
    COFFSymbolCount = pImageFileHeader->NumberOfSymbols;

    if ( fShowLineNumbers )
    {
        // Walk through the section table...
        for (i=0; i < pImageFileHeader->NumberOfSections; i++)
        {
            // if there's any line numbers for this section, dump'em
            if ( pSections->NumberOfLinenumbers )
            {
                DumpLineNumbers( MakePtr(PIMAGE_LINENUMBER, pImageFileHeader,
                                         pSections->PointerToLinenumbers),
                                 pSections->NumberOfLinenumbers );
                printf("\n");
            }
            pSections++;
        }
    }
    
    if ( fShowSymbolTable )
    {
        DumpSymbolTable(PCOFFSymbolTable, COFFSymbolCount);
        printf("\n");
    }
    
    if ( fShowRawSectionData )
    {
        DumpRawSectionData( (PIMAGE_SECTION_HEADER)(pImageFileHeader+1),
                            pImageFileHeader,
                            pImageFileHeader->NumberOfSections);
    }
}