/**************************** cmdline.cpp **********************************
* Author: Agner Fog
* Date created: 2006-07-25
* Last modified: 2018-01-29
* Project: objconv
* Module: cmdline.cpp
* Description:
* This module is for interpretation of command line options
* Also contains symbol change function
*
* Copyright 2006-2018 GNU General Public License http://www.gnu.org/licenses
*****************************************************************************/
#include "stdafx.h"
// List of recognized output file type options
static SIntTxt TypeOptionNames[] = {
{CMDL_OUTPUT_ELF, "elf"},
{CMDL_OUTPUT_PE, "pe"},
{CMDL_OUTPUT_PE, "coff"},
{CMDL_OUTPUT_PE, "cof"},
{CMDL_OUTPUT_PE, "win"},
{CMDL_OUTPUT_OMF, "omf"},
{CMDL_OUTPUT_MACHO, "mac"},
{CMDL_OUTPUT_MACHO, "macho"},
{CMDL_OUTPUT_MACHO, "mach-o"},
{CMDL_OUTPUT_MACHO, "mach"},
{CMDL_OUTPUT_MASM, "asm"},
{CMDL_OUTPUT_MASM, "masm"},
{CMDL_OUTPUT_MASM, "tasm"},
{CMDL_OUTPUT_MASM, "nasm"},
{CMDL_OUTPUT_MASM, "yasm"},
{CMDL_OUTPUT_MASM, "gasm"},
{CMDL_OUTPUT_MASM, "gas"}
};
// List of subtype names
static SIntTxt SubtypeNames[] = {
{SUBTYPE_MASM, "asm"},
{SUBTYPE_MASM, "masm"},
{SUBTYPE_MASM, "tasm"},
{SUBTYPE_YASM, "nasm"},
{SUBTYPE_YASM, "yasm"},
{SUBTYPE_GASM, "gasm"},
{SUBTYPE_GASM, "gas"}
};
// List of standard names that are always translated
const uint32 MaxType = FILETYPE_MACHO_LE;
// Standard names in 32-bit mode
const char * StandardNames32[][MaxType+1] = {
// 0, COFF, OMF, ELF, MACHO
{0,"___ImageBase","___ImageBase","__executable_start","__mh_execute_header"}
};
// Standard names in 64-bit mode
// COFF removes an underscore in 32-bit. There is no 64-bit OMF
const char * StandardNames64[][MaxType+1] = {
// 0, COFF, OMF, ELF, MACHO
{0,"__ImageBase", "", "__executable_start","__mh_execute_header"}
};
const int NumStandardNames = sizeof(StandardNames32) / sizeof(StandardNames32[0]);
// Command line interpreter
CCommandLineInterpreter cmd; // Instantiate command line interpreter
CCommandLineInterpreter::CCommandLineInterpreter() {
// Default constructor
memset(this, 0, sizeof(*this)); // Set all to zero
Verbose = CMDL_VERBOSE_YES; // How much diagnostics to print on screen
DumpOptions = DUMP_NONE; // Dump options
DebugInfo = CMDL_DEBUG_DEFAULT; // Strip or convert debug info
ExeptionInfo = CMDL_EXCEPTION_DEFAULT; // Strip or preserve exception handling info
SegmentDot = CMDL_SECTIONDOT_NOCHANGE; // Change underscore/dot in beginning of segment names
Underscore = CMDL_UNDERSCORE_NOCHANGE; // Add/remove underscores in symbol names
LibraryOptions = CMDL_LIBRARY_DEFAULT; // Library options
}
CCommandLineInterpreter::~CCommandLineInterpreter() { // Destructor
}
void CCommandLineInterpreter::ReadCommandLine(int argc, char * argv[]) {
// Read command line
for (int i = 1; i < argc; i++) {
ReadCommandItem(argv[i]);
}
if (ShowHelp || (InputFile == 0 && OutputFile == 0) /* || !OutputType */) {
// No useful command found. Print help
Help(); ShowHelp = 1;
return;
}
// Check file options
FileOptions = CMDL_FILE_INPUT;
if (LibraryOptions == CMDL_LIBRARY_ADDMEMBER) {
// Adding object files to library. Library may not exist
FileOptions = CMDL_FILE_IN_IF_EXISTS;
}
if (DumpOptions || ((LibraryOptions & CMDL_LIBRARY_EXTRACTMEM) && !(LibraryOptions & CMDL_LIBRARY_ADDMEMBER))) {
// Dumping or extracting. Output file not used
if (OutputFile) err.submit(1103); // Output file name ignored
OutputFile = 0;
}
else {
// Output file required
FileOptions |= CMDL_FILE_OUTPUT;
}
if ((LibraryOptions & CMDL_LIBRARY_ADDMEMBER) && !(LibraryOptions & CMDL_LIBRARY_CONVERT)) {
// Adding library members only. Output file may have same name as input file
FileOptions |= CMDL_FILE_IN_OUT_SAME;
}
// Check output type
if (!OutputType) {
// Output type not defined yet
if (LibraryOptions & (CMDL_LIBRARY_CONVERT | CMDL_LIBRARY_ADDMEMBER)) {
OutputType = FILETYPE_LIBRARY;
}
}
}
void CCommandLineInterpreter::ReadCommandItem(char * string) {
// Read one option from command line
// Skip leading whitespace
while (*string != 0 && *string <= ' ') string++;
if (*string == 0) return; // Empty string
// Look for option prefix and response file prefix
const char OptionPrefix1 = '-'; // Option must begin with '-'
#if defined (_WIN32) || defined (__WINDOWS__)
const char OptionPrefix2 = '/'; // '/' allowed instead of '-' in Windows only
#else
const char OptionPrefix2 = '-';
#endif
const char ResponseFilePrefix = '@'; // Response file name prefixed by '@'
if (*string == OptionPrefix1 || *string == OptionPrefix2) {
// Option prefix found. This is a command line option
InterpretCommandOption(string+1);
}
else if (*string == ResponseFilePrefix) {
// Response file prefix found. Read more options from response file
ReadCommandFile(string+1);
}
else {
// No prefix found. This is an input or output file name
InterpretFileName(string);
}
int loc, last = SymbolList.GetNumEntries() - 1;
if (last > 0) {
// relocate last entry (binary insertion sort):
SSymbolChange * List = (SSymbolChange *)SymbolList.Buf();
SSymbolChange key = List[last];
SymbolBinSearch(key.Name1, last, &loc);
memmove(List + loc + 1, List + loc, (last - loc) * sizeof(SSymbolChange));
List[loc] = key;
}
}
void CCommandLineInterpreter::ReadCommandFile(char * filename) {
// Read commands from file
if (*filename <= ' ') {
err.submit(1001); return; // Warning: empty filename
}
// Check if too many response file buffers (possibly because file includes itself)
if (++NumBuffers > MAX_COMMAND_FILES) {err.submit(2107); return;}
// Allocate buffer for response files.
if (ResponseFiles.GetNumEntries() == 0) {
ResponseFiles.SetNum(MAX_COMMAND_FILES);
ResponseFiles.SetZero();
}
// Read response file into new buffer
ResponseFiles[NumBuffers-1].FileName = filename;
ResponseFiles[NumBuffers-1].Read();
// Get buffer with file contents
char * buffer = ResponseFiles[NumBuffers-1].Buf();
char * ItemBegin, * ItemEnd; // Mark begin and end of token in buffer
// Check if buffer is allocated
if (buffer) {
// Parse contents of response file for tokens
while (*buffer) {
// Skip whitespace
while (*buffer != 0 && uint8(*buffer) <= uint8(' ')) buffer++;
if (*buffer == 0) break; // End of buffer found
ItemBegin = buffer;
// Find end of token
ItemEnd = buffer+1;
while (uint8(*ItemEnd) > uint8(' ')) ItemEnd++;
if (*ItemEnd == 0) {
buffer = ItemEnd;
}
else {
buffer = ItemEnd + 1;
*ItemEnd = 0; // Mark end of token
}
// Found token.
// Check if it is a comment beginning with '#' or '//'
if (ItemBegin[0] == '#' || (ItemBegin[0] == '/' && ItemBegin[1] == '/' )) {
// This is a comment. Skip to end of line
ItemEnd = buffer;
while (*ItemEnd != 0 && *ItemEnd != '\n') {
ItemEnd++;
}
if (*ItemEnd == 0) {
buffer = ItemEnd;
}
else {
buffer = ItemEnd + 1;
}
continue;
}
// Not a comment. Interpret token
ReadCommandItem(ItemBegin);
}
}
}
void CCommandLineInterpreter::InterpretFileName(char * string) {
// Interpret input or output filename from command line
switch (libmode) {
case 1: // First filename after -lib = inputfile and outputfile
InputFile = string;
libmode = 2;
return;
case 2: // Second or later filename after -lib = object file to add to library
AddObjectToLibrary(string, string);
return;
}
// libmode = 0: Ordinary input or output file
if (!InputFile) {
// Input file not specified yet
InputFile = string;
}
else if (!OutputFile) {
// Output file not specified yet
OutputFile = string;
}
else {
// Both input and output files already specified
err.submit(2001);
}
}
void CCommandLineInterpreter::InterpretCommandOption(char * string) {
// Interpret one option from command line
if (*string <= ' ') {
err.submit(1001); return; // Warning: empty option
}
// Detect option type
switch(string[0]) {
case 'f': case 'F': // output file format
if (string[1] == 'd') {
// -fd == deprecated dump option
InterpretDumpOption(string+2); break;
}
InterpretOutputTypeOption(string+1); break;
case 'v': case 'V': // verbose/silent
InterpretVerboseOption(string+1); break;
case 'd': case 'D': // dump option
InterpretDumpOption(string+1); break;
// Debug info option
//InterpretDebugInfoOption(string+1); break;
case 'x': case 'X': // Exception handler info option
InterpretExceptionInfoOption(string+1); break;
case 'h': case 'H': case '?': // Help
ShowHelp = 1; break;
case 'e': case 'E': // Error option
case 'w': case 'W': // Warning option
InterpretErrorOption(string); break;
case 'n': case 'N': // Symbol name change option
case 'a': case 'A': // Symbol name alias option
InterpretSymbolNameChangeOption(string); break;
case 'i': case 'I': // Imagebase
if ((string[1] | 0x20) == 'm') {
InterpretImagebaseOption(string);
}
break;
case 'l': case 'L': // Library option
InterpretLibraryOption(string); break;
case 'c': // Count instruction codes supported
// This is an easter egg: You can only get it if you know it's there
if (strncmp(string,"countinstructions", 17) == 0) {
CDisassembler::CountInstructions();
exit(0);
}
default: // Unknown option
err.submit(1002, string);
}
}
void CCommandLineInterpreter::InterpretLibraryOption(char * string) {
// Interpret options for manipulating library/archive files
// Check for -lib command
if (stricmp(string, "lib") == 0) { // Found -lib command
if (InputFile) {
libmode = 2; // Input file already specified. Remaining file names are object files to add
}
else {
libmode = 1; // The rest of the command line must be interpreted as library name and object file names
}
return;
}
SSymbolChange sym = {0,0,0,0}; // Symbol change record
int i; // Loop counter
// Check for member name and optional new name in this command
char * name1 = 0, * name2 = 0, separator;
if ((string[2] == ':' || string[2] == '|') && string[3]) {
// name1 found
separator = string[2];
name1 = string+3;
// Search for second separator or end
name2 = name1 + 1;
while (name2[0] != 0) {
if (name2[0] == separator) {
*name2 = 0; // Mark end of name1
if (name2[1]) {
// name2 found
name2++; // Name2 starts here
break;
}
}
name2++;
}
if (name2 == 0 || name2[0] == 0 || name2[0] == separator) {
// name 2 is blank
//name2 = name1;
name2 = 0;
}
else {
// Check if name2 ends with separator
for (i = 0; i < (int)strlen(name2); i++) {
if (name2[i] == separator) name2[i] = 0;
}
}
}
// Check for duplicate name
if (SymbolIsInList(name1)) {
// This symbol is already in list
err.submit(2017, name1);
return;
}
sym.Name1 = name1; // Store names in symbol change record
sym.Name2 = name2;
switch (string[1]) {
case 'a': case 'A': // Add input file to library
if (name1) {
AddObjectToLibrary(name1, name2);
}
else err.submit(2004, string);
break;
case 'x': case 'X': // Extract member(s) from library
if (name1) {
// Extract specified member
cmd.LibraryOptions = CMDL_LIBRARY_EXTRACTMEM;
sym.Action = SYMA_EXTRACT_MEMBER;
SymbolList.Push(&sym, sizeof(sym));
}
else {
// Extract all members
cmd.LibraryOptions = CMDL_LIBRARY_EXTRACTALL;
}
break;
case 'd': case 'D': // Delete member from library
if (name1) {
// Delete specified member
cmd.LibraryOptions = CMDL_LIBRARY_CONVERT;
sym.Action = SYMA_DELETE_MEMBER;
SymbolList.Push(&sym, sizeof(sym));
}
else err.submit(2004, string);
break;
case 's': case 'S': // Use short member names for compatibility
cmd.LibrarySubtype = LIBTYPE_SHORTNAMES;
break;
default:
err.submit(2004, string); // Unknown option
}
}
void CCommandLineInterpreter::AddObjectToLibrary(char * filename, char * membername) {
// Add object file to library
if (!filename || !*filename) {
err.submit(2004, filename-1); return; // Empty string
}
if (!membername || !*membername) membername = filename;
SSymbolChange Sym = {0,0,0,0}; // Symbol change record
Sym.Name2 = filename; // Object file name
if (!MemberNamesAllocated) {
// Allocate space for truncated member names
const int SafetySpace = 1024;
// Get size of response files
if (ResponseFiles.GetNumEntries()) {
MemberNamesAllocated = ResponseFiles[0].GetDataSize() + ResponseFiles[1].GetDataSize();
}
// Allocate this size + SafetySpace
MemberNames.SetSize(MemberNamesAllocated + SafetySpace);
// Remember allocated buffer size
MemberNamesAllocated = MemberNames.GetBufferSize();
}
// Truncate name and store it in MemberNames
//uint32 Name1Offset = MemberNames.PushString(CLibrary::TruncateMemberName(membername));
uint32 Name1Offset = MemberNames.PushString(membername);
Sym.Name1 = (char*)(MemberNames.Buf() + Name1Offset);
CLibrary::StripMemberName(Sym.Name1);
// Note: Sym.Name1 points to allocated memory in violation of good programming practice.
// Check that it is not reallocated:
if (MemberNames.GetBufferSize() != MemberNamesAllocated) {
err.submit(2506); // Cannot reallocate MemberNames because we have pointers to in in SymbolList
return;
}
// Check for duplicate name
if (SymbolIsInList(Sym.Name1)) {
// This symbol is already in list
err.submit(2017, Sym.Name1);
return;
}
// Store options
cmd.LibraryOptions |= CMDL_LIBRARY_ADDMEMBER;
Sym.Action = SYMA_ADD_MEMBER;
// Store SYMA_ADD_MEMBER record in symbol list
SymbolList.Push(&Sym, sizeof(Sym));
}
void CCommandLineInterpreter::InterpretOutputTypeOption(char * string) {
// Interpret output file format option from command line
int opt;
for (opt = 0; opt < TableSize(TypeOptionNames); opt++) {
int len = (int)strlen(TypeOptionNames[opt].b);
if (strncmp(string, TypeOptionNames[opt].b, len) == 0) {
// Match found
if (OutputType) err.submit(2003, string); // More than one output type specified
if (DumpOptions) err.submit(2007); // Both dump and convert specified
// Save desired output type
OutputType = TypeOptionNames[opt].a;
// Check if name is followed by a word size
int wordsize = 0;
if (string[len]) wordsize = atoi(string+len);
switch (wordsize) {
case 0: // No word size specified
break;
case 32: case 64: // Valid word size
DesiredWordSize = wordsize;
break;
default: // Illegal word size
err.submit(2002, wordsize);
}
break; // Finished searching
}
}
// Check if found
if (opt >= TableSize(TypeOptionNames)) err.submit(2004, string-1);
if (OutputType == CMDL_OUTPUT_MASM) {
// Get subtype
for (opt = 0; opt < TableSize(SubtypeNames); opt++) {
int len = (int)strlen(SubtypeNames[opt].b);
if (strncmp(string, SubtypeNames[opt].b, len) == 0) {
// Match found
SubType = SubtypeNames[opt].a; break;
}
}
}
}
void CCommandLineInterpreter::InterpretVerboseOption(char * string) {
// Interpret silent/verbose option from command line
Verbose = atoi(string);
}
void CCommandLineInterpreter::InterpretDumpOption(char * string) {
// Interpret dump option from command line
if (OutputType || DumpOptions) err.submit(2007); // Both dump and convert specified
char * s1 = string;
while (*s1) {
switch (*(s1++)) {
case 'f': case 'F': // dump file header
DumpOptions |= DUMP_FILEHDR; break;
case 'h': case 'H': // dump section headers
DumpOptions |= DUMP_SECTHDR; break;
case 's': case 'S': // dump symbol table
DumpOptions |= DUMP_SYMTAB; break;
case 'r': case 'R': // dump relocations
DumpOptions |= DUMP_RELTAB; break;
case 'n': case 'N': // dump string table
DumpOptions |= DUMP_STRINGTB; break;
case 'c': case 'C': // dump comment records (currently only for OMF)
DumpOptions |= DUMP_COMMENT; break;
default:
err.submit(2004, string-1); // Unknown option
}
}
if (DumpOptions == 0) DumpOptions = DUMP_FILEHDR;
OutputType = CMDL_OUTPUT_DUMP;
if (OutputType && OutputType != CMDL_OUTPUT_DUMP) err.submit(2007); // Both dump and convert specified
OutputType = CMDL_OUTPUT_DUMP;
}
void CCommandLineInterpreter::InterpretDebugInfoOption(char * string) {
// Interpret debug info option from command line
if (strlen(string) > 1) err.submit(2004, string-1); // Unknown option
switch (*string) {
case 's': case 'S': case 'r': case 'R': // Strip (remove)
DebugInfo = CMDL_DEBUG_STRIP; break;
case 'p': case 'P': // Preserve
DebugInfo = CMDL_DEBUG_PRESERVE; break;
case 'l': case 'L': // (Not supported)
DebugInfo = CMDL_DEBUG_LINNUM; break;
case 'c': case 'C': // (Not supported)
DebugInfo = CMDL_DEBUG_SYMBOLS; break;
default:
err.submit(2004, string-1); // Unknown option
}
}
void CCommandLineInterpreter::InterpretExceptionInfoOption(char * string) {
// Interpret exception handler info option from command line
if (strlen(string) > 1) err.submit(2004, string-1); // Unknown option
switch (*string) {
case 's': case 'S': case 'r': case 'R': // Strip (remove)
ExeptionInfo = CMDL_EXCEPTION_STRIP; break;
case 'p': case 'P': // Preserve
ExeptionInfo = CMDL_EXCEPTION_PRESERVE; break;
default:
err.submit(2004, string-1); // Unknown option
}
}
void CCommandLineInterpreter::InterpretErrorOption(char * string) {
// Interpret warning/error option from command line
if (strlen(string) < 3) {
err.submit(2004, string); return; // Unknown option
}
int newstatus; // New status for this error number
switch (string[1]) {
case 'd': case 'D': // Disable
newstatus = 0; break;
case 'w': case 'W': // Treat as warning
newstatus = 1; break;
case 'e': case 'E': // Treat as error
newstatus = 2; break;
default:
err.submit(2004, string); // Unknown option
return;
}
if (string[2] == 'x' || string[2] == 'X') {
// Apply new status to all non-fatal messages
for (SErrorText * ep = ErrorTexts; ep->Status < 9; ep++) {
ep->Status = newstatus; // Change status of all errors
}
}
else {
int ErrNum = atoi(string+2);
if (ErrNum == 0 && string[2] != '0') {
err.submit(2004, string); return; // Unknown option
}
// Search for this error number
SErrorText * ep = err.FindError(ErrNum);
if (ep->Status & 0x100) {
// Error number not found
err.submit(1003, ErrNum); return; // Unknown error number
}
// Change status of this error
ep->Status = newstatus;
}
}
void CCommandLineInterpreter::InterpretSymbolNameChangeOption(char * string) {
// Interpret various options for changing symbol names
SSymbolChange sym = {0,0,0,0}; // Symbol change record
string[0] |= 0x20; // change first letter to lower case
// Check for symbol names in this command
char * name1 = 0, * name2 = 0;
if (string[2] == ':' && string[3]) {
// name1 found
name1 = string+3;
// Search for second ':' or end
name2 = name1 + 1;
while (name2[0] != 0) {
if (name2[0] == ':') {
*name2 = 0; // Mark end of name1
if (name2[1]) {
// name2 found
name2++; // Name2 starts here
break;
}
}
name2++;
}
if (name2 && name2[0]) {
// name2 found. check if it ends with ':'
for (uint32 i = 0; i < (uint32)strlen(name2); i++) {
if (name2[i] == ':') name2[i] = 0;
}
}
if (name2[0] == 0) name2 = 0;
}
// Check for duplicate name
if (name1 && SymbolIsInList(name1)) {
// This symbol is already in list
err.submit(2015, name1);
return;
}
switch (string[1]) {
case 'u': case 'U': // underscore option
switch (string[2]) {
case 0:
Underscore = CMDL_UNDERSCORE_CHANGE;
if (string[0] == 'a') Underscore |= CMDL_KEEP_ALIAS;
break;
case '+': case 'a': case 'A':
Underscore = CMDL_UNDERSCORE_ADD;
if (string[0] == 'a') Underscore |= CMDL_KEEP_ALIAS;
break;
case '-': case 'r': case 'R':
Underscore = CMDL_UNDERSCORE_REMOVE;
if (string[0] == 'a') Underscore |= CMDL_KEEP_ALIAS;
break;
default:
err.submit(2004, string); // Unknown option
}
break;
case 'd': case 'D': // section name dot option
SegmentDot = CMDL_SECTIONDOT_CHANGE;
break;
case 'r': case 'R': // name replace option
if (name1 == 0 || name2 == 0 || *name1 == 0 || *name2 == 0) {
err.submit(2008, string); return;
}
sym.Name1 = name1;
sym.Name2 = name2;
sym.Action = SYMA_CHANGE_NAME;
if (string[0] == 'a') sym.Action |= SYMA_ALIAS;
SymbolList.Push(&sym, sizeof(sym)); SymbolChangeEntries++;
break;
case 'p': case 'P': // prefix replace option
if (name1 == 0 || *name1 == 0) {
err.submit(2008, string); return;
}
if (name2 == 0) name2 = (char*)"";
sym.Name1 = name1;
sym.Name2 = name2;
sym.Action = SYMA_CHANGE_PREFIX;
if (string[0] == 'a') sym.Action |= SYMA_ALIAS;
PrefixSuffixList.Push(&sym, sizeof(sym)); SymbolChangeEntries++;
break;
case 's': case 'S': // suffix replace option
if (name1 == 0 || *name1 == 0) {
err.submit(2008, string); return;
}
if (name2 == 0) name2 = (char*)"";
sym.Name1 = name1;
sym.Name2 = name2;
sym.Action = SYMA_CHANGE_SUFFIX;
if (string[0] == 'a') sym.Action |= SYMA_ALIAS;
PrefixSuffixList.Push(&sym, sizeof(sym)); SymbolChangeEntries++;
break;
case 'w': case 'W': // Weaken symbol
if (name1 == 0 || *name1 == 0 || name2) {
err.submit(2009, string); return;
}
sym.Name1 = name1;
sym.Action = SYMA_MAKE_WEAK;
SymbolList.Push(&sym, sizeof(sym)); SymbolChangeEntries++;
break;
case 'l': case 'L': // Make symbol local or hidden
if (name1 == 0 || *name1 == 0 || name2) {
err.submit(2009, string); return;
}
sym.Name1 = name1;
sym.Action = SYMA_MAKE_LOCAL;
SymbolList.Push(&sym, sizeof(sym)); SymbolChangeEntries++;
break;
default:
err.submit(2004, string); // Unknown option
}
}
void CCommandLineInterpreter::InterpretImagebaseOption(char * string) {
// Interpret image base option
char * p = strchr(string, '=');
if ((strnicmp(string, "imagebase", 9) && strnicmp(string, "image_base", 10)) || !p) {
// Unknown option
err.submit(1002, string);
return;
}
if (ImageBase) err.submit(2330); // Imagebase specified more than once
p++; // point to number following '='
// Loop through string to interpret hexadecimal number
while (*p) {
char letter = *p | 0x20; // lower case letter
if (*p >= '0' && *p <= '9') {
// 0 - 9 hexadecimal digit
ImageBase = (ImageBase << 4) + *p - '0';
}
else if (letter >= 'a' && letter <= 'f') {
// A - F hexadecimal digit
ImageBase = (ImageBase << 4) + letter - 'a' + 10;
}
else if (letter == 'h') {
// Hexadecimal number may end with 'H'
break;
}
else if (letter == 'x' || letter == ' ') {
// Hexadecimal number may begin with 0x
if (ImageBase) {
// 'x' preceded by number other than 0
err.submit(1002, string); break;
}
}
else {
// Any other character not allowed
err.submit(1002, string); break;
}
// next character
p++;
}
if (ImageBase & 0xFFF) {
// Must be divisible by page size
err.submit(2331, string);
}
if ((int32)ImageBase <= 0) {
// Cannot be zero or > 2^31
err.submit(2332, string);
}
}
SSymbolChange const * CCommandLineInterpreter::GetMemberToAdd() {
// Get names of object files to add to library
// replaced will be set to 1 if a member with the same name is replaced
// Search through SymbolList, continuing from last CurrentSymbol
while (CurrentSymbol < SymbolList.GetDataSize()) {
// Get pointer to current symbol record
SSymbolChange * Sym = (SSymbolChange *)(SymbolList.Buf() + CurrentSymbol);
// Increment pointer
CurrentSymbol += sizeof(SSymbolChange);
// Check record type
if (Sym->Action == SYMA_ADD_MEMBER) {
// Name found
return Sym;
}
}
// No more names found
return 0;
}
void CCommandLineInterpreter::CheckExtractSuccess() {
// Check if library members to extract were found
// Search through SymbolList for extract records
for (uint32 i = 0; i < SymbolList.GetDataSize(); i += sizeof(SSymbolChange)) {
SSymbolChange * Sym = (SSymbolChange *)(SymbolList.Buf() + i);
if (Sym->Action == SYMA_EXTRACT_MEMBER && Sym->Done == 0) {
// Member has not been extracted
err.submit(1104, Sym->Name1);
}
}
}
void CCommandLineInterpreter::CheckSymbolModifySuccess() {
// Check if symbols to modify were found
// Search through SymbolList for symbol change records
for (uint32 i = 0; i < SymbolList.GetDataSize(); i += sizeof(SSymbolChange)) {
SSymbolChange * Sym = (SSymbolChange *)(SymbolList.Buf() + i);
if (Sym->Action >= SYMA_MAKE_WEAK && Sym->Action < SYMA_ADD_MEMBER && Sym->Done == 0) {
// Member has not been extracted
err.submit(1106, Sym->Name1);
}
if (Sym->Action == SYMA_DELETE_MEMBER && Sym->Done == 0) {
// Member has not been extracted
err.submit(1105, Sym->Name1);
}
}
}
int CCommandLineInterpreter::SymbolIsInList(char const * name) {
// Check if name is already in symbol list
int unused;
return SymbolBinSearch(name, SymbolList.GetNumEntries(), &unused);
}
int CCommandLineInterpreter::SymbolBinSearch(char const * name, int nsym, int * location) {
SSymbolChange * List = (SSymbolChange *)SymbolList.Buf();
int lo = 0, hi = nsym - 1;
while (lo <= hi) {
int mid = (lo + hi) >> 1;
int comp = strcmp(name, List[mid].Name1);
if (!comp) {
*location = mid;
return 1;
} else if (comp < 0) {
hi = mid - 1;
} else {
lo = mid + 1;
}
}
*location = lo;
return 0;
}
int CCommandLineInterpreter::SymbolChange(char const * oldname, char const ** newname, int symtype) {
// Check if symbol has to be changed
int action = 0, i, isym;
int nsym = SymbolList.GetNumEntries();
int n_prefix_suffix = PrefixSuffixList.GetNumEntries();
if (oldname == 0) return SYMA_NOCHANGE;
if (newname) *newname = 0;
// Convert standard names if type conversion
if (cmd.InputType != cmd.OutputType
&& uint32(cmd.InputType) <= MaxType && uint32(cmd.OutputType) <= MaxType) {
if (DesiredWordSize == 32) {
// Look for standard names to translate, 32-bit
for (i = 0; i < NumStandardNames; i++) {
if (strcmp(oldname, StandardNames32[i][cmd.InputType]) == 0) {
// Match found
*newname = StandardNames32[i][cmd.OutputType];
CountSymbolNameChanges++;
return SYMA_CHANGE_NAME; // Change name of symbol
}
}
}
else {
// Look for standard names to translate, 64-bit
for (i = 0; i < NumStandardNames; i++) {
if (strcmp(oldname, StandardNames64[i][cmd.InputType]) == 0) {
// Match found
*newname = StandardNames64[i][cmd.OutputType];
CountSymbolNameChanges++;
return SYMA_CHANGE_NAME; // Change name of symbol
}
}
}
}
// See if there are other conversions to do
if (Underscore == 0 && SegmentDot == 0 && nsym == 0 && n_prefix_suffix == 0) return SYMA_NOCHANGE; // Nothing to do
if (oldname == 0 || *oldname == 0) return SYMA_NOCHANGE; // No name
static char NameBuffer[MAXSYMBOLLENGTH];
// search for name in list of names specified by user on command line
SSymbolChange * psym;
int found = SymbolBinSearch(oldname, nsym, &isym);
if (found) {
psym = (SSymbolChange *)SymbolList.Buf() + isym;
} else {
// Search prefix/suffix match
psym = (SSymbolChange *)PrefixSuffixList.Buf();
for (isym = 0; isym < n_prefix_suffix; isym++, psym++) {
int n1len = (int)strlen(psym->Name1); // Length of string to search for
int onlen = (int)strlen(oldname); // Length of string to match
if ((psym->Action&~SYMA_ALIAS) == SYMA_CHANGE_PREFIX && strncmp(oldname, psym->Name1, n1len)==0) break; // matching prefix found
if ((psym->Action&~SYMA_ALIAS) == SYMA_CHANGE_SUFFIX && strcmp(oldname+onlen-n1len, psym->Name1)==0) break; // matching suffix found
}
found = isym < n_prefix_suffix;
}
if (found) {
// A matching name was found.
action = psym->Action;
// Whatever action is specified here is overriding any general option
// Statistics counting
switch (action & ~SYMA_ALIAS) {
case SYMA_MAKE_WEAK: // Make public symbol weak
if (symtype == SYMT_PUBLIC) {
CountSymbolsWeakened++; psym->Done++;
}
else { // only public symbols can be weakened
err.submit(1020, oldname); // cannot make weak
action = SYMA_NOCHANGE;
}
break;
case SYMA_MAKE_LOCAL: // Hide public or external symbol
if (symtype == SYMT_PUBLIC || symtype == SYMT_EXTERNAL) {
CountSymbolsMadeLocal++; psym->Done++;
if (symtype == SYMT_EXTERNAL) err.submit(1023, oldname);
}
else { // only public and external symbols can be made local
err.submit(1021, oldname); // cannot make local
action = SYMA_NOCHANGE;
}
break;
case SYMA_CHANGE_NAME: // Change name of symbol or segment or library member
CountSymbolNameChanges++; psym->Done++;
*newname = psym->Name2;
break;
case SYMA_CHANGE_PREFIX: // Change beginning of symbol name
if (symtype == SYMT_PUBLIC || symtype == SYMT_EXTERNAL || symtype == SYMT_LOCAL || symtype == SYMT_SECTION) {
if (strlen(oldname) - strlen(psym->Name1) + strlen(psym->Name2) >= MAXSYMBOLLENGTH) {
err.submit(2202, oldname); // Name too long
action = SYMA_NOCHANGE; break;
}
strcpy(NameBuffer, psym->Name2);
strcpy(NameBuffer + strlen(psym->Name2), oldname + strlen(psym->Name1));
action = SYMA_CHANGE_NAME;
*newname = NameBuffer;
CountSymbolNameChanges++; psym->Done++;
}
else { // only symbols and segments can change prefix
err.submit(1024, oldname);
action = SYMA_NOCHANGE;
}
break;
case SYMA_CHANGE_SUFFIX: // Change end of symbol name
if (symtype == SYMT_PUBLIC || symtype == SYMT_EXTERNAL || symtype == SYMT_LOCAL || symtype == SYMT_SECTION) {
if (strlen(oldname) - strlen(psym->Name1) + strlen(psym->Name2) >= MAXSYMBOLLENGTH) {
err.submit(2202, oldname); // Name too long
action = SYMA_NOCHANGE; break;
}
strcpy(NameBuffer, oldname);
strcpy(NameBuffer + strlen(oldname) - strlen(psym->Name1), psym->Name2);
action = SYMA_CHANGE_NAME;
*newname = NameBuffer;
CountSymbolNameChanges++; psym->Done++;
}
else { // only symbols and segments can change prefix
err.submit(1024, oldname);
action = SYMA_NOCHANGE;
}
break;
case SYMA_EXTRACT_MEMBER:
*newname = psym->Name2;
// continue in next case
case SYMA_DELETE_MEMBER: case SYMA_ADD_MEMBER:
if (symtype == SYMT_LIBRARYMEMBER) {
// Change to library member
psym->Done++;
}
else {
// Ignore action for symbols that have the same name as a library member
action = SYMA_NOCHANGE;
}
}
if (action && (psym->Action & SYMA_ALIAS)) {
// Keep old name as alias
if (symtype == SYMT_PUBLIC) {
CountSymbolNameAliases++; psym->Done++;
action = SYMA_ALIAS;
}
else { // only public symbols can have aliases
CountSymbolNameChanges--;
err.submit(1022, oldname); // cannot make alias
action = SYMA_NOCHANGE;
}
}
// Action to take
return action;
}
// Not found in list. Check for section options
if (symtype == SYMT_SECTION) {
if (!strncmp(oldname, ".rela", 5)) {
// ELF relocation section must have same name change as mother section
const char * name2;
int action2 = SymbolChange(oldname+5, &name2, symtype);
if (action2 == SYMA_CHANGE_NAME && strlen(name2) + 6 < MAXSYMBOLLENGTH) {
sprintf(NameBuffer, ".rela%s", name2);
*newname = NameBuffer;
return action2;
}
}
if (!strncmp(oldname, ".rel", 4)) {
// ELF relocation section must have same name change as mother section
const char * name2;
int action2 = SymbolChange(oldname+4, &name2, symtype);
if (action2 == SYMA_CHANGE_NAME && strlen(name2) + 5 < MAXSYMBOLLENGTH) {
sprintf(NameBuffer, ".rel%s", name2);
*newname = NameBuffer;
return action2;
}
}
if (SegmentDot) {
// Change section name
if (SegmentDot == CMDL_SECTIONDOT_U2DOT && oldname[0] == '_') {
// replace '_' by '.'
strncpy(NameBuffer, oldname, MAXSYMBOLLENGTH-1);
NameBuffer[MAXSYMBOLLENGTH-1] = 0; // Terminate string
NameBuffer[0] = '.';
*newname = NameBuffer;
CountSectionDotConversions++;
return SYMA_CHANGE_NAME;
}
if (SegmentDot == CMDL_SECTIONDOT_DOT2U && oldname[0] == '.') {
// replace '.' by '_'
// Note: Microsoft and Intel compilers have . on standard names
// and _ on nonstandard names in COFF files
// Borland requires _ on all segment names in OMF files
/*
// Standard section names that should not be changed
static char const * StandardSectionNames[] = {
".text", ".data", ".bss", ".comment", ".lib"
};
for (uint32 i = 0; i < sizeof(StandardSectionNames)/sizeof(StandardSectionNames[0]); i++) {
if (stricmp(oldname,StandardSectionNames[i]) == 0) {
// Standard name. Don't change
return SYMA_NOCHANGE;
}
}*/
strncpy(NameBuffer, oldname, MAXSYMBOLLENGTH-1);
NameBuffer[MAXSYMBOLLENGTH-1] = 0; // Terminate string
NameBuffer[0] = '_';
*newname = NameBuffer;
CountSectionDotConversions++;
return SYMA_CHANGE_NAME;
}
}
}
// Check for underscore options
if ((Underscore & 0x0F) == CMDL_UNDERSCORE_REMOVE && oldname[0] == '_') {
// Remove underscore
if ((Underscore & CMDL_KEEP_ALIAS) && symtype == SYMT_PUBLIC) {
// Alias only applicable to public symbols
// Make alias without underscore
*newname = oldname + 1;
CountUnderscoreConversions++; CountSymbolNameAliases++;
return SYMA_ALIAS;
}
// Change name applicable to public and external symbols
if (symtype == SYMT_PUBLIC || symtype == SYMT_EXTERNAL) {
// Make new name without underscore
*newname = oldname + 1;
CountUnderscoreConversions++;
return SYMA_CHANGE_NAME;
}
}
if ((Underscore & 0x0F) == CMDL_UNDERSCORE_ADD) {
// Add underscore even if it already has one
if ((Underscore & CMDL_KEEP_ALIAS) && symtype == SYMT_PUBLIC) {
// Alias only applicable to public symbols
// Make alias with underscore
strncpy(NameBuffer+1, oldname, MAXSYMBOLLENGTH-2);
NameBuffer[MAXSYMBOLLENGTH-1] = 0; // Terminate string
NameBuffer[0] = '_';
*newname = NameBuffer;
CountUnderscoreConversions++; CountSymbolNameAliases++;
return SYMA_ALIAS;
}
// Change name applicable to public and external symbols
if (symtype == SYMT_PUBLIC || symtype == SYMT_EXTERNAL) {
// Make new name with underscore
strncpy(NameBuffer+1, oldname, MAXSYMBOLLENGTH-2);
NameBuffer[MAXSYMBOLLENGTH-1] = 0; // Terminate string
NameBuffer[0] = '_';
*newname = NameBuffer;
CountUnderscoreConversions++;
return SYMA_CHANGE_NAME;
}
}
return SYMA_NOCHANGE;
}
int CCommandLineInterpreter::SymbolChangesRequested() {
// Any kind of symbol change requested on command line
return (Underscore != 0)
| (SegmentDot != 0) << 1
| (SymbolChangeEntries != 0) << 2;
}
void CCommandLineInterpreter::CountDebugRemoved() {
// Count debug sections removed
CountDebugSectionsRemoved++;
}
void CCommandLineInterpreter::CountExceptionRemoved() {
// Count exception handler sections removed
CountExceptionSectionsRemoved++;
}
void CCommandLineInterpreter::CountSymbolsHidden() {
// Count unused external references hidden
CountUnusedSymbolsHidden++;
}
void CCommandLineInterpreter::ReportStatistics() {
// Report statistics about name changes etc.
if (DebugInfo == CMDL_DEBUG_STRIP || ExeptionInfo == CMDL_EXCEPTION_STRIP
|| Underscore || SegmentDot || SymbolList.GetNumEntries()) {
printf ("\n");
}
if (DebugInfo == CMDL_DEBUG_STRIP) {
printf ("\n%3i Debug sections removed", CountDebugSectionsRemoved);
}
if (ExeptionInfo == CMDL_EXCEPTION_STRIP) {
printf ("\n%3i Exception sections removed", CountExceptionSectionsRemoved);
}
if ((DebugInfo == CMDL_DEBUG_STRIP || ExeptionInfo == CMDL_EXCEPTION_STRIP)
&& CountUnusedSymbolsHidden) {
printf ("\n%3i Unused external symbol references hidden", CountUnusedSymbolsHidden);
}
if (Underscore || SegmentDot || SymbolList.GetNumEntries()) {
if (CountUnderscoreConversions || Underscore) {
printf ("\n%3i Changes in leading underscores on symbol names", CountUnderscoreConversions);
}
if (CountSectionDotConversions || SegmentDot) {
printf ("\n%3i Changes in leading characters on section names", CountSectionDotConversions);
}
if (CountSymbolNameChanges) {
printf ("\n%3i Symbol names changed", CountSymbolNameChanges);
}
if (CountSymbolNameAliases) {
printf ("\n%3i Public symbol names aliased", CountSymbolNameAliases);
}
if (CountSymbolsWeakened) {
printf ("\n%3i Public symbol names made weak", CountSymbolsWeakened);
}
if (CountSymbolsMadeLocal) {
printf ("\n%3i Public or external symbol names made local", CountSymbolsMadeLocal);
}
if (SymbolChangeEntries && !CountSymbolNameChanges && !CountSymbolNameAliases && !CountSymbolsWeakened && !CountSymbolsMadeLocal) {
printf ("\n No symbols to change were found");
}
}
}
void CCommandLineInterpreter::Help() {
// Print help message
printf("\nObject file converter version %.2f for x86 and x86-64 platforms.", OBJCONV_VERSION);
printf("\nCopyright (c) 2018 by Agner Fog. Gnu General Public License.");
printf("\n\nUsage: objconv options inputfile [outputfile]");
printf("\n\nOptions:");
printf("\n-fXXX[SS] Output file format XXX, word size SS. Supported formats:");
printf("\n PE, COFF, ELF, OMF, MACHO\n");
printf("\n-fasm Disassemble file (-fmasm, -fnasm, -fyasm, -fgasm)\n");
printf("\n-dXXX Dump file contents to console.");
printf("\n Values of XXX (can be combined):");
printf("\n f: File header, h: section Headers, s: Symbol table,");
printf("\n r: Relocation table, n: string table.\n");
printf("\n-nu change symbol Name Underscores to the default for the target format.");
printf("\n-nu- remove Underscores from symbol Names.");
printf("\n-nu+ add Underscores to symbol Names.");
printf("\n-nd replace Dot/underscore in section names.");
printf("\n-nr:N1:N2 Replace symbol Name N1 with N2.");
printf("\n-np:N1:N2 Replace symbol Prefix N1 with N2.");
printf("\n-ns:N1:N2 Replace symbol Suffix N1 with N2.");
printf("\n-ar:N1:N2 make Alias N2 for existing public name N1.");
printf("\n-ap:N1:N2 Replace symbol Prefix and keep old name as alias.");
printf("\n-as:N1:N2 Replace symbol Suffix and keep old name as alias.");
printf("\n-nw:N1 make public symbol Name N1 Weak (ELF and MAC64 only).");
printf("\n-nl:N1 make public symbol Name N1 Local (invisible).\n");
//printf("\n-ds Strip Debug info."); // default if input and output are different formats
//printf("\n-dp Preserve Debug info, even if it is incompatible.");
printf("\n-xs Strip exception handling info and other incompatible info."); // default if input and output are different formats. Hides unused symbols
printf("\n-xp Preserve exception handling info and other incompatible info.\n");
printf("\n-lx eXtract all members from Library.");
printf("\n-lx:N1:N2 eXtract member N1 from Library to file N2.");
printf("\n-ld:N1 Delete member N1 from Library.");
printf("\n-la:N1:N2 Add object file N1 to Library as member N2.");
printf("\n Alternative: -lib LIBRARYNAME OBJECTFILENAMES.\n");
printf("\n-vN Verbose options. Values of N:");
printf("\n 0: Silent, 1: Print file names and types, 2: Tell about conversions.");
printf("\n-wdNNN Disable Warning NNN.");
printf("\n-weNNN treat Warning NNN as Error. -wex: treat all warnings as errors.");
printf("\n-edNNN Disable Error number NNN.");
printf("\n-ewNNN treat Error number NNN as Warning.\n");
printf("\n-h Print this help screen.\n");
printf("\n@RFILE Read additional options from response file RFILE.\n");
printf("\n\nExample:");
printf("\nobjconv -felf32 -nu filename.obj filename.o\n\n");
}