504 lines
13 KiB
C
504 lines
13 KiB
C
/*
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* winDumpExts.c --
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* Author: Gordon Chaffee, Scott Stanton
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*
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* History: The real functionality of this file was written by
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* Matt Pietrek in 1993 in his pedump utility. I've
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* modified it to dump the externals in a bunch of object
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* files to create a .def file.
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*
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* 10/12/95 Modified by Scott Stanton to support Relocatable Object Module
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* Format files for Borland C++ 4.5.
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*
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* Notes: Visual C++ puts an underscore before each exported symbol.
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* This file removes them. I don't know if this is a problem
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* this other compilers. If _MSC_VER is defined,
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* the underscore is removed. If not, it isn't. To get a
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* full dump of an object file, use the -f option. This can
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* help determine the something that may be different with a
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* compiler other than Visual C++.
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*----------------------------------------------------------------------
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*
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* SCCS: @(#) winDumpExts.c 1.11 96/09/18 15:25:11
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*/
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#include <windows.h>
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#include <stdio.h>
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#include <string.h>
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#include <process.h>
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#ifdef _ALPHA_
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#define e_magic_number IMAGE_FILE_MACHINE_ALPHA
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#else
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#define e_magic_number IMAGE_FILE_MACHINE_I386
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#endif
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/*
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*----------------------------------------------------------------------
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* GetArgcArgv --
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*
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* Break up a line into argc argv
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*----------------------------------------------------------------------
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*/
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int
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GetArgcArgv(char *s, char **argv)
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{
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int quote = 0;
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int argc = 0;
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char *bp;
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bp = s;
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while (1) {
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while (isspace(*bp)) {
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bp++;
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}
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if (*bp == '\n' || *bp == '\0') {
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*bp = '\0';
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return argc;
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}
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if (*bp == '\"') {
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quote = 1;
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bp++;
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}
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argv[argc++] = bp;
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while (*bp != '\0') {
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if (quote) {
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if (*bp == '\"') {
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quote = 0;
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*bp = '\0';
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bp++;
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break;
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}
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bp++;
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continue;
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}
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if (isspace(*bp)) {
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*bp = '\0';
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bp++;
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break;
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}
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bp++;
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}
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}
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}
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/*
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* The names of the first group of possible symbol table storage classes
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*/
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char * SzStorageClass1[] = {
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"NULL","AUTOMATIC","EXTERNAL","STATIC","REGISTER","EXTERNAL_DEF","LABEL",
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"UNDEFINED_LABEL","MEMBER_OF_STRUCT","ARGUMENT","STRUCT_TAG",
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"MEMBER_OF_UNION","UNION_TAG","TYPE_DEFINITION","UNDEFINED_STATIC",
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"ENUM_TAG","MEMBER_OF_ENUM","REGISTER_PARAM","BIT_FIELD"
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};
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/*
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* The names of the second group of possible symbol table storage classes
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*/
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char * SzStorageClass2[] = {
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"BLOCK","FUNCTION","END_OF_STRUCT","FILE","SECTION","WEAK_EXTERNAL"
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};
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/*
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*----------------------------------------------------------------------
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* GetSZStorageClass --
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*
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* Given a symbol storage class value, return a descriptive
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* ASCII string
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*----------------------------------------------------------------------
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*/
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PSTR
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GetSZStorageClass(BYTE storageClass)
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{
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if ( storageClass <= IMAGE_SYM_CLASS_BIT_FIELD )
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return SzStorageClass1[storageClass];
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else if ( (storageClass >= IMAGE_SYM_CLASS_BLOCK)
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&& (storageClass <= IMAGE_SYM_CLASS_WEAK_EXTERNAL) )
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return SzStorageClass2[storageClass-IMAGE_SYM_CLASS_BLOCK];
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else
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return "???";
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}
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/*
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*----------------------------------------------------------------------
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* GetSectionName --
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*
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* Used by DumpSymbolTable, it gives meaningful names to
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* the non-normal section number.
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*
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* Results:
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* A name is returned in buffer
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*----------------------------------------------------------------------
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*/
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void
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GetSectionName(WORD section, PSTR buffer, unsigned cbBuffer)
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{
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char tempbuffer[10];
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switch ( (SHORT)section )
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{
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case IMAGE_SYM_UNDEFINED: strcpy(tempbuffer, "UNDEF"); break;
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case IMAGE_SYM_ABSOLUTE: strcpy(tempbuffer, "ABS "); break;
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case IMAGE_SYM_DEBUG: strcpy(tempbuffer, "DEBUG"); break;
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default: wsprintf(tempbuffer, "%-5X", section);
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}
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strncpy(buffer, tempbuffer, cbBuffer-1);
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}
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/*
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*----------------------------------------------------------------------
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* DumpSymbolTable --
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*
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* Dumps a COFF symbol table from an EXE or OBJ. We only use
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* it to dump tables from OBJs.
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*----------------------------------------------------------------------
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*/
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void
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DumpSymbolTable(PIMAGE_SYMBOL pSymbolTable, FILE *fout, unsigned cSymbols)
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{
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unsigned i;
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PSTR stringTable;
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char sectionName[10];
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fprintf(fout, "Symbol Table - %X entries (* = auxillary symbol)\n",
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cSymbols);
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fprintf(fout,
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"Indx Name Value Section cAux Type Storage\n"
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"---- -------------------- -------- ---------- ----- ------- --------\n");
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/*
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* The string table apparently starts right after the symbol table
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*/
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stringTable = (PSTR)&pSymbolTable[cSymbols];
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for ( i=0; i < cSymbols; i++ ) {
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fprintf(fout, "%04X ", i);
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if ( pSymbolTable->N.Name.Short != 0 )
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fprintf(fout, "%-20.8s", pSymbolTable->N.ShortName);
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else
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fprintf(fout, "%-20s", stringTable + pSymbolTable->N.Name.Long);
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fprintf(fout, " %08X", pSymbolTable->Value);
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GetSectionName(pSymbolTable->SectionNumber, sectionName,
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sizeof(sectionName));
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fprintf(fout, " sect:%s aux:%X type:%02X st:%s\n",
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sectionName,
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pSymbolTable->NumberOfAuxSymbols,
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pSymbolTable->Type,
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GetSZStorageClass(pSymbolTable->StorageClass) );
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#if 0
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if ( pSymbolTable->NumberOfAuxSymbols )
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DumpAuxSymbols(pSymbolTable);
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#endif
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/*
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* Take into account any aux symbols
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*/
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i += pSymbolTable->NumberOfAuxSymbols;
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pSymbolTable += pSymbolTable->NumberOfAuxSymbols;
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pSymbolTable++;
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}
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}
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/*
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*----------------------------------------------------------------------
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* DumpExternals --
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*
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* Dumps a COFF symbol table from an EXE or OBJ. We only use
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* it to dump tables from OBJs.
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*----------------------------------------------------------------------
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*/
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void
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DumpExternals(PIMAGE_SYMBOL pSymbolTable, FILE *fout, unsigned cSymbols)
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{
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unsigned i;
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PSTR stringTable;
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char *s, *f;
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char symbol[1024];
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/*
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* The string table apparently starts right after the symbol table
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*/
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stringTable = (PSTR)&pSymbolTable[cSymbols];
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for ( i=0; i < cSymbols; i++ ) {
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if (pSymbolTable->SectionNumber > 0 && pSymbolTable->Type == 0x20) {
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if (pSymbolTable->StorageClass == IMAGE_SYM_CLASS_EXTERNAL) {
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if (pSymbolTable->N.Name.Short != 0) {
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strncpy(symbol, pSymbolTable->N.ShortName, 8);
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symbol[8] = 0;
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} else {
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s = stringTable + pSymbolTable->N.Name.Long;
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strcpy(symbol, s);
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}
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s = symbol;
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f = strchr(s, '@');
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if (f) {
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*f = 0;
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}
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#if defined(_MSC_VER) && defined(_X86_)
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if (symbol[0] == '_') {
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s = &symbol[1];
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}
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#endif
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if ((stricmp(s, "DllEntryPoint") != 0)
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&& (stricmp(s, "DllMain") != 0)) {
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fprintf(fout, "\t%s\n", s);
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}
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}
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}
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/*
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* Take into account any aux symbols
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*/
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i += pSymbolTable->NumberOfAuxSymbols;
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pSymbolTable += pSymbolTable->NumberOfAuxSymbols;
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pSymbolTable++;
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}
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}
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/*
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*----------------------------------------------------------------------
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* DumpObjFile --
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*
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* Dump an object file--either a full listing or just the exported
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* symbols.
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*----------------------------------------------------------------------
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*/
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void
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DumpObjFile(PIMAGE_FILE_HEADER pImageFileHeader, FILE *fout, int full)
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{
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PIMAGE_SYMBOL PCOFFSymbolTable;
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DWORD COFFSymbolCount;
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PCOFFSymbolTable = (PIMAGE_SYMBOL)
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((DWORD)pImageFileHeader + pImageFileHeader->PointerToSymbolTable);
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COFFSymbolCount = pImageFileHeader->NumberOfSymbols;
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if (full) {
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DumpSymbolTable(PCOFFSymbolTable, fout, COFFSymbolCount);
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} else {
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DumpExternals(PCOFFSymbolTable, fout, COFFSymbolCount);
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}
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}
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/*
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*----------------------------------------------------------------------
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* SkipToNextRecord --
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*
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* Skip over the current ROMF record and return the type of the
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* next record.
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*----------------------------------------------------------------------
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*/
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BYTE
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SkipToNextRecord(BYTE **ppBuffer)
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{
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int length;
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(*ppBuffer)++; /* Skip over the type.*/
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length = *((WORD*)(*ppBuffer))++; /* Retrieve the length. */
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*ppBuffer += length; /* Skip over the rest. */
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return **ppBuffer; /* Return the type. */
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}
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/*
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*----------------------------------------------------------------------
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* DumpROMFObjFile --
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*
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* Dump a Relocatable Object Module Format file, displaying only
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* the exported symbols.
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*----------------------------------------------------------------------
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*/
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void
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DumpROMFObjFile(LPVOID pBuffer, FILE *fout)
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{
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BYTE type, length;
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char symbol[1024], *s;
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while (1) {
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type = SkipToNextRecord(&(BYTE*)pBuffer);
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if (type == 0x90) { /* PUBDEF */
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if (((BYTE*)pBuffer)[4] != 0) {
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length = ((BYTE*)pBuffer)[5];
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strncpy(symbol, ((char*)pBuffer) + 6, length);
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symbol[length] = '\0';
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s = symbol;
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if ((stricmp(s, "DllEntryPoint") != 0)
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&& (stricmp(s, "DllMain") != 0)) {
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if (s[0] == '_') {
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s++;
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fprintf(fout, "\t_%s\n\t%s=_%s\n", s, s, s);
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} else {
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fprintf(fout, "\t%s\n", s);
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}
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}
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}
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} else if (type == 0x8B || type == 0x8A) { /* MODEND */
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break;
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}
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}
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}
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/*
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*----------------------------------------------------------------------
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* DumpFile --
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*
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* Open up a file, memory map it, and call the appropriate
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* dumping routine
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*----------------------------------------------------------------------
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*/
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void
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DumpFile(LPSTR filename, FILE *fout, int full)
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{
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HANDLE hFile;
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HANDLE hFileMapping;
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LPVOID lpFileBase;
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PIMAGE_DOS_HEADER dosHeader;
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hFile = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, NULL,
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OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
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if (hFile == INVALID_HANDLE_VALUE) {
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fprintf(stderr, "Couldn't open file with CreateFile()\n");
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return;
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}
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hFileMapping = CreateFileMapping(hFile, NULL, PAGE_READONLY, 0, 0, NULL);
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if (hFileMapping == 0) {
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CloseHandle(hFile);
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fprintf(stderr, "Couldn't open file mapping with CreateFileMapping()\n");
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return;
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}
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lpFileBase = MapViewOfFile(hFileMapping, FILE_MAP_READ, 0, 0, 0);
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if (lpFileBase == 0) {
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CloseHandle(hFileMapping);
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CloseHandle(hFile);
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fprintf(stderr, "Couldn't map view of file with MapViewOfFile()\n");
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return;
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}
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dosHeader = (PIMAGE_DOS_HEADER)lpFileBase;
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if (dosHeader->e_magic == IMAGE_DOS_SIGNATURE) {
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#if 0
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DumpExeFile( dosHeader );
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#else
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fprintf(stderr, "File is an executable. I don't dump those.\n");
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return;
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#endif
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}
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/* Does it look like a i386 COFF OBJ file??? */
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else if ((dosHeader->e_magic == e_magic_number)
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&& (dosHeader->e_sp == 0)) {
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/*
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* The two tests above aren't what they look like. They're
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* really checking for IMAGE_FILE_HEADER.Machine == i386 (0x14C)
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* and IMAGE_FILE_HEADER.SizeOfOptionalHeader == 0;
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*/
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DumpObjFile((PIMAGE_FILE_HEADER) lpFileBase, fout, full);
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} else if (*((BYTE *)lpFileBase) == 0x80) {
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/*
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* This file looks like it might be a ROMF file.
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*/
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DumpROMFObjFile(lpFileBase, fout);
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} else {
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printf("unrecognized file format\n");
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}
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UnmapViewOfFile(lpFileBase);
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CloseHandle(hFileMapping);
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CloseHandle(hFile);
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}
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void
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main(int argc, char **argv)
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{
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char *fargv[1000];
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char cmdline[10000];
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int i, arg;
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FILE *fout;
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int pos;
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int full = 0;
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char *outfile = NULL;
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if (argc < 3) {
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Usage:
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fprintf(stderr, "Usage: %s ?-o outfile? ?-f(ull)? <dllname> <object filenames> ..\n", argv[0]);
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exit(1);
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}
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arg = 1;
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while (argv[arg][0] == '-') {
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if (strcmp(argv[arg], "--") == 0) {
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arg++;
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break;
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} else if (strcmp(argv[arg], "-f") == 0) {
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full = 1;
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} else if (strcmp(argv[arg], "-o") == 0) {
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arg++;
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if (arg == argc) {
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goto Usage;
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}
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outfile = argv[arg];
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}
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arg++;
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}
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if (arg == argc) {
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goto Usage;
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}
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if (outfile) {
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fout = fopen(outfile, "w+");
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if (fout == NULL) {
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fprintf(stderr, "Unable to open \'%s\' for writing:\n",
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argv[arg]);
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perror("");
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exit(1);
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}
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} else {
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fout = stdout;
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}
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if (! full) {
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char *dllname = argv[arg];
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arg++;
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if (arg == argc) {
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goto Usage;
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}
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fprintf(fout, "LIBRARY %s\n", dllname);
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fprintf(fout, "EXETYPE WINDOWS\n");
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fprintf(fout, "CODE PRELOAD MOVEABLE DISCARDABLE\n");
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fprintf(fout, "DATA PRELOAD MOVEABLE MULTIPLE\n\n");
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fprintf(fout, "EXPORTS\n");
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}
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for (; arg < argc; arg++) {
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if (argv[arg][0] == '@') {
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FILE *fargs = fopen(&argv[arg][1], "r");
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if (fargs == NULL) {
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fprintf(stderr, "Unable to open \'%s\' for reading:\n",
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argv[arg]);
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perror("");
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exit(1);
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}
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pos = 0;
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for (i = 0; i < arg; i++) {
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strcpy(&cmdline[pos], argv[i]);
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pos += strlen(&cmdline[pos]) + 1;
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fargv[i] = argv[i];
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}
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fgets(&cmdline[pos], sizeof(cmdline), fargs);
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fprintf(stderr, "%s\n", &cmdline[pos]);
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fclose(fargs);
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i += GetArgcArgv(&cmdline[pos], &fargv[i]);
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argc = i;
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argv = fargv;
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}
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DumpFile(argv[arg], fout, full);
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}
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exit(0);
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}
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