shylie/llvm-project
1
0
Fork 0
Code Issues Pull Requests Actions 6 Packages Projects Releases Wiki Activity
llvm-project/lld/lib/Driver/DarwinLdDriver.cpp
Rui Ueyama aa7b304ea7 Remove the Native file format. 
The Native file format was designed to be the fastest on-memory or
on-disk file format for object files. The problem is that no one
is working on that. No LLVM tools can produce object files in
the Native, thus the feature of supporting the format is useless
in the linker.

This patch removes the Native file support. We can add it back
if we really want it in future.

llvm-svn: 234641
2015-04-10 21:23:51 +00:00

832 lines
30 KiB
C++
Raw Blame History

//===- lib/Driver/DarwinLdDriver.cpp --------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
///
/// \file
///
/// Concrete instance of the Driver for darwin's ld.
///
//===----------------------------------------------------------------------===//
#include "lld/Core/File.h"
#include "lld/Core/ArchiveLibraryFile.h"
#include "lld/Core/SharedLibraryFile.h"
#include "lld/Driver/Driver.h"
#include "lld/ReaderWriter/MachOLinkingContext.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Option/Arg.h"
#include "llvm/Option/Option.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Host.h"
#include "llvm/Support/MachO.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/PrettyStackTrace.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
using namespace lld;
namespace {
// Create enum with OPT_xxx values for each option in DarwinLdOptions.td
enum {
OPT_INVALID = 0,
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
HELP, META) \
OPT_##ID,
#include "DarwinLdOptions.inc"
#undef OPTION
};
// Create prefix string literals used in DarwinLdOptions.td
#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
#include "DarwinLdOptions.inc"
#undef PREFIX
// Create table mapping all options defined in DarwinLdOptions.td
static const llvm::opt::OptTable::Info infoTable[] = {
#define OPTION(PREFIX, NAME, ID, KIND, GROUP, ALIAS, ALIASARGS, FLAGS, PARAM, \
HELPTEXT, METAVAR) \
{ PREFIX, NAME, HELPTEXT, METAVAR, OPT_##ID, llvm::opt::Option::KIND##Class, \
PARAM, FLAGS, OPT_##GROUP, OPT_##ALIAS, ALIASARGS },
#include "DarwinLdOptions.inc"
#undef OPTION
};
// Create OptTable class for parsing actual command line arguments
class DarwinLdOptTable : public llvm::opt::OptTable {
public:
DarwinLdOptTable() : OptTable(infoTable, llvm::array_lengthof(infoTable)){}
};
std::vector<std::unique_ptr<File>>
loadFile(MachOLinkingContext &ctx, StringRef path,
raw_ostream &diag, bool wholeArchive, bool upwardDylib) {
if (ctx.logInputFiles())
diag << path << "\n";
ErrorOr<std::unique_ptr<MemoryBuffer>> mbOrErr = ctx.getMemoryBuffer(path);
if (std::error_code ec = mbOrErr.getError())
return makeErrorFile(path, ec);
std::vector<std::unique_ptr<File>> files;
if (std::error_code ec = ctx.registry().loadFile(std::move(mbOrErr.get()), files))
return makeErrorFile(path, ec);
for (std::unique_ptr<File> &pf : files) {
// If file is a dylib, inform LinkingContext about it.
if (SharedLibraryFile *shl = dyn_cast<SharedLibraryFile>(pf.get())) {
if (std::error_code ec = shl->parse())
return makeErrorFile(path, ec);
ctx.registerDylib(reinterpret_cast<mach_o::MachODylibFile*>(shl),
upwardDylib);
}
}
if (wholeArchive)
return parseMemberFiles(files);
return files;
}
} // anonymous namespace
// Test may be running on Windows. Canonicalize the path
// separator to '/' to get consistent outputs for tests.
static std::string canonicalizePath(StringRef path) {
char sep = llvm::sys::path::get_separator().front();
if (sep != '/') {
std::string fixedPath = path;
std::replace(fixedPath.begin(), fixedPath.end(), sep, '/');
return fixedPath;
} else {
return path;
}
}
static void addFile(StringRef path, MachOLinkingContext &ctx,
bool loadWholeArchive,
bool upwardDylib, raw_ostream &diag) {
std::vector<std::unique_ptr<File>> files =
loadFile(ctx, path, diag, loadWholeArchive, upwardDylib);
for (std::unique_ptr<File> &file : files)
ctx.getNodes().push_back(llvm::make_unique<FileNode>(std::move(file)));
}
// Export lists are one symbol per line. Blank lines are ignored.
// Trailing comments start with #.
static std::error_code parseExportsList(StringRef exportFilePath,
MachOLinkingContext &ctx,
raw_ostream &diagnostics) {
// Map in export list file.
ErrorOr<std::unique_ptr<MemoryBuffer>> mb =
MemoryBuffer::getFileOrSTDIN(exportFilePath);
if (std::error_code ec = mb.getError())
return ec;
ctx.addInputFileDependency(exportFilePath);
StringRef buffer = mb->get()->getBuffer();
while (!buffer.empty()) {
// Split off each line in the file.
std::pair<StringRef, StringRef> lineAndRest = buffer.split('\n');
StringRef line = lineAndRest.first;
// Ignore trailing # comments.
std::pair<StringRef, StringRef> symAndComment = line.split('#');
StringRef sym = symAndComment.first.trim();
if (!sym.empty())
ctx.addExportSymbol(sym);
buffer = lineAndRest.second;
}
return std::error_code();
}
/// Order files are one symbol per line. Blank lines are ignored.
/// Trailing comments start with #. Symbol names can be prefixed with an
/// architecture name and/or .o leaf name. Examples:
/// _foo
/// bar.o:_bar
/// libfrob.a(bar.o):_bar
/// x86_64:_foo64
static std::error_code parseOrderFile(StringRef orderFilePath,
MachOLinkingContext &ctx,
raw_ostream &diagnostics) {
// Map in order file.
ErrorOr<std::unique_ptr<MemoryBuffer>> mb =
MemoryBuffer::getFileOrSTDIN(orderFilePath);
if (std::error_code ec = mb.getError())
return ec;
ctx.addInputFileDependency(orderFilePath);
StringRef buffer = mb->get()->getBuffer();
while (!buffer.empty()) {
// Split off each line in the file.
std::pair<StringRef, StringRef> lineAndRest = buffer.split('\n');
StringRef line = lineAndRest.first;
buffer = lineAndRest.second;
// Ignore trailing # comments.
std::pair<StringRef, StringRef> symAndComment = line.split('#');
if (symAndComment.first.empty())
continue;
StringRef sym = symAndComment.first.trim();
if (sym.empty())
continue;
// Check for prefix.
StringRef prefix;
std::pair<StringRef, StringRef> prefixAndSym = sym.split(':');
if (!prefixAndSym.second.empty()) {
sym = prefixAndSym.second;
prefix = prefixAndSym.first;
if (!prefix.endswith(".o") && !prefix.endswith(".o)")) {
// If arch name prefix does not match arch being linked, ignore symbol.
if (!ctx.archName().equals(prefix))
continue;
prefix = "";
}
} else
sym = prefixAndSym.first;
if (!sym.empty()) {
ctx.appendOrderedSymbol(sym, prefix);
//llvm::errs() << sym << ", prefix=" << prefix << "\n";
}
}
return std::error_code();
}
//
// There are two variants of the -filelist option:
//
// -filelist <path>
// In this variant, the path is to a text file which contains one file path
// per line. There are no comments or trimming of whitespace.
//
// -fileList <path>,<dir>
// In this variant, the path is to a text file which contains a partial path
// per line. The <dir> prefix is prepended to each partial path.
//
static std::error_code loadFileList(StringRef fileListPath,
MachOLinkingContext &ctx, bool forceLoad,
raw_ostream &diagnostics) {
// If there is a comma, split off <dir>.
std::pair<StringRef, StringRef> opt = fileListPath.split(',');
StringRef filePath = opt.first;
StringRef dirName = opt.second;
ctx.addInputFileDependency(filePath);
// Map in file list file.
ErrorOr<std::unique_ptr<MemoryBuffer>> mb =
MemoryBuffer::getFileOrSTDIN(filePath);
if (std::error_code ec = mb.getError())
return ec;
StringRef buffer = mb->get()->getBuffer();
while (!buffer.empty()) {
// Split off each line in the file.
std::pair<StringRef, StringRef> lineAndRest = buffer.split('\n');
StringRef line = lineAndRest.first;
StringRef path;
if (!dirName.empty()) {
// If there is a <dir> then prepend dir to each line.
SmallString<256> fullPath;
fullPath.assign(dirName);
llvm::sys::path::append(fullPath, Twine(line));
path = ctx.copy(fullPath.str());
} else {
// No <dir> use whole line as input file path.
path = ctx.copy(line);
}
if (!ctx.pathExists(path)) {
return make_dynamic_error_code(Twine("File not found '")
+ path
+ "'");
}
if (ctx.testingFileUsage()) {
diagnostics << "Found filelist entry " << canonicalizePath(path) << '\n';
}
addFile(path, ctx, forceLoad, false, diagnostics);
buffer = lineAndRest.second;
}
return std::error_code();
}
/// Parse number assuming it is base 16, but allow 0x prefix.
static bool parseNumberBase16(StringRef numStr, uint64_t &baseAddress) {
if (numStr.startswith_lower("0x"))
numStr = numStr.drop_front(2);
return numStr.getAsInteger(16, baseAddress);
}
namespace lld {
bool DarwinLdDriver::linkMachO(int argc, const char *argv[],
raw_ostream &diagnostics) {
MachOLinkingContext ctx;
if (!parse(argc, argv, ctx, diagnostics))
return false;
if (ctx.doNothing())
return true;
return link(ctx, diagnostics);
}
bool DarwinLdDriver::parse(int argc, const char *argv[],
MachOLinkingContext &ctx, raw_ostream &diagnostics) {
// Parse command line options using DarwinLdOptions.td
std::unique_ptr<llvm::opt::InputArgList> parsedArgs;
DarwinLdOptTable table;
unsigned missingIndex;
unsigned missingCount;
bool globalWholeArchive = false;
parsedArgs.reset(
table.ParseArgs(&argv[1], &argv[argc], missingIndex, missingCount));
if (missingCount) {
diagnostics << "error: missing arg value for '"
<< parsedArgs->getArgString(missingIndex) << "' expected "
<< missingCount << " argument(s).\n";
return false;
}
for (auto unknownArg : parsedArgs->filtered(OPT_UNKNOWN)) {
diagnostics << "warning: ignoring unknown argument: "
<< unknownArg->getAsString(*parsedArgs) << "\n";
}
// Figure out output kind ( -dylib, -r, -bundle, -preload, or -static )
llvm::MachO::HeaderFileType fileType = llvm::MachO::MH_EXECUTE;
if ( llvm::opt::Arg *kind = parsedArgs->getLastArg(OPT_dylib, OPT_relocatable,
OPT_bundle, OPT_static, OPT_preload)) {
switch (kind->getOption().getID()) {
case OPT_dylib:
fileType = llvm::MachO::MH_DYLIB;
break;
case OPT_relocatable:
fileType = llvm::MachO::MH_OBJECT;
break;
case OPT_bundle:
fileType = llvm::MachO::MH_BUNDLE;
break;
case OPT_static:
fileType = llvm::MachO::MH_EXECUTE;
break;
case OPT_preload:
fileType = llvm::MachO::MH_PRELOAD;
break;
}
}
// Handle -arch xxx
MachOLinkingContext::Arch arch = MachOLinkingContext::arch_unknown;
if (llvm::opt::Arg *archStr = parsedArgs->getLastArg(OPT_arch)) {
arch = MachOLinkingContext::archFromName(archStr->getValue());
if (arch == MachOLinkingContext::arch_unknown) {
diagnostics << "error: unknown arch named '" << archStr->getValue()
<< "'\n";
return false;
}
}
// If no -arch specified, scan input files to find first non-fat .o file.
if (arch == MachOLinkingContext::arch_unknown) {
for (auto &inFile: parsedArgs->filtered(OPT_INPUT)) {
// This is expensive because it opens and maps the file. But that is
// ok because no -arch is rare.
if (MachOLinkingContext::isThinObjectFile(inFile->getValue(), arch))
break;
}
if (arch == MachOLinkingContext::arch_unknown
&& !parsedArgs->getLastArg(OPT_test_file_usage)) {
// If no -arch and no options at all, print usage message.
if (parsedArgs->size() == 0)
table.PrintHelp(llvm::outs(), argv[0], "LLVM Linker", false);
else
diagnostics << "error: -arch not specified and could not be inferred\n";
return false;
}
}
// Handle -macosx_version_min or -ios_version_min
MachOLinkingContext::OS os = MachOLinkingContext::OS::macOSX;
uint32_t minOSVersion = 0;
if (llvm::opt::Arg *minOS =
parsedArgs->getLastArg(OPT_macosx_version_min, OPT_ios_version_min,
OPT_ios_simulator_version_min)) {
switch (minOS->getOption().getID()) {
case OPT_macosx_version_min:
os = MachOLinkingContext::OS::macOSX;
if (MachOLinkingContext::parsePackedVersion(minOS->getValue(),
minOSVersion)) {
diagnostics << "error: malformed macosx_version_min value\n";
return false;
}
break;
case OPT_ios_version_min:
os = MachOLinkingContext::OS::iOS;
if (MachOLinkingContext::parsePackedVersion(minOS->getValue(),
minOSVersion)) {
diagnostics << "error: malformed ios_version_min value\n";
return false;
}
break;
case OPT_ios_simulator_version_min:
os = MachOLinkingContext::OS::iOS_simulator;
if (MachOLinkingContext::parsePackedVersion(minOS->getValue(),
minOSVersion)) {
diagnostics << "error: malformed ios_simulator_version_min value\n";
return false;
}
break;
}
} else {
// No min-os version on command line, check environment variables
}
// Now that there's enough information parsed in, let the linking context
// set up default values.
ctx.configure(fileType, arch, os, minOSVersion);
// Handle -e xxx
if (llvm::opt::Arg *entry = parsedArgs->getLastArg(OPT_entry))
ctx.setEntrySymbolName(entry->getValue());
// Handle -o xxx
if (llvm::opt::Arg *outpath = parsedArgs->getLastArg(OPT_output))
ctx.setOutputPath(outpath->getValue());
else
ctx.setOutputPath("a.out");
// Handle -image_base XXX and -seg1addr XXXX
if (llvm::opt::Arg *imageBase = parsedArgs->getLastArg(OPT_image_base)) {
uint64_t baseAddress;
if (parseNumberBase16(imageBase->getValue(), baseAddress)) {
diagnostics << "error: image_base expects a hex number\n";
return false;
} else if (baseAddress < ctx.pageZeroSize()) {
diagnostics << "error: image_base overlaps with __PAGEZERO\n";
return false;
} else if (baseAddress % ctx.pageSize()) {
diagnostics << "error: image_base must be a multiple of page size ("
<< llvm::format("0x%" PRIx64, ctx.pageSize()) << ")\n";
return false;
}
ctx.setBaseAddress(baseAddress);
}
// Handle -dead_strip
if (parsedArgs->getLastArg(OPT_dead_strip))
ctx.setDeadStripping(true);
// Handle -all_load
if (parsedArgs->getLastArg(OPT_all_load))
globalWholeArchive = true;
// Handle -install_name
if (llvm::opt::Arg *installName = parsedArgs->getLastArg(OPT_install_name))
ctx.setInstallName(installName->getValue());
else
ctx.setInstallName(ctx.outputPath());
// Handle -mark_dead_strippable_dylib
if (parsedArgs->getLastArg(OPT_mark_dead_strippable_dylib))
ctx.setDeadStrippableDylib(true);
// Handle -compatibility_version and -current_version
if (llvm::opt::Arg *vers =
parsedArgs->getLastArg(OPT_compatibility_version)) {
if (ctx.outputMachOType() != llvm::MachO::MH_DYLIB) {
diagnostics
<< "error: -compatibility_version can only be used with -dylib\n";
return false;
}
uint32_t parsedVers;
if (MachOLinkingContext::parsePackedVersion(vers->getValue(), parsedVers)) {
diagnostics << "error: -compatibility_version value is malformed\n";
return false;
}
ctx.setCompatibilityVersion(parsedVers);
}
if (llvm::opt::Arg *vers = parsedArgs->getLastArg(OPT_current_version)) {
if (ctx.outputMachOType() != llvm::MachO::MH_DYLIB) {
diagnostics << "-current_version can only be used with -dylib\n";
return false;
}
uint32_t parsedVers;
if (MachOLinkingContext::parsePackedVersion(vers->getValue(), parsedVers)) {
diagnostics << "error: -current_version value is malformed\n";
return false;
}
ctx.setCurrentVersion(parsedVers);
}
// Handle -bundle_loader
if (llvm::opt::Arg *loader = parsedArgs->getLastArg(OPT_bundle_loader))
ctx.setBundleLoader(loader->getValue());
// Handle -sectalign segname sectname align
for (auto &alignArg : parsedArgs->filtered(OPT_sectalign)) {
const char* segName = alignArg->getValue(0);
const char* sectName = alignArg->getValue(1);
const char* alignStr = alignArg->getValue(2);
if ((alignStr[0] == '0') && (alignStr[1] == 'x'))
alignStr += 2;
unsigned long long alignValue;
if (llvm::getAsUnsignedInteger(alignStr, 16, alignValue)) {
diagnostics << "error: -sectalign alignment value '"
<< alignStr << "' not a valid number\n";
return false;
}
uint16_t align = 1 << llvm::countTrailingZeros(alignValue);
if (!llvm::isPowerOf2_64(alignValue)) {
diagnostics << "warning: alignment for '-sectalign "
<< segName << " " << sectName
<< llvm::format(" 0x%llX", alignValue)
<< "' is not a power of two, using "
<< llvm::format("0x%08X", align) << "\n";
}
ctx.addSectionAlignment(segName, sectName, align);
}
// Handle -mllvm
for (auto &llvmArg : parsedArgs->filtered(OPT_mllvm)) {
ctx.appendLLVMOption(llvmArg->getValue());
}
// Handle -print_atoms
if (parsedArgs->getLastArg(OPT_print_atoms))
ctx.setPrintAtoms();
// Handle -t (trace) option.
if (parsedArgs->getLastArg(OPT_t))
ctx.setLogInputFiles(true);
// Handle -demangle option.
if (parsedArgs->getLastArg(OPT_demangle))
ctx.setDemangleSymbols(true);
// Handle -keep_private_externs
if (parsedArgs->getLastArg(OPT_keep_private_externs)) {
ctx.setKeepPrivateExterns(true);
if (ctx.outputMachOType() != llvm::MachO::MH_OBJECT)
diagnostics << "warning: -keep_private_externs only used in -r mode\n";
}
// Handle -dependency_info <path> used by Xcode.
if (llvm::opt::Arg *depInfo = parsedArgs->getLastArg(OPT_dependency_info)) {
if (std::error_code ec = ctx.createDependencyFile(depInfo->getValue())) {
diagnostics << "warning: " << ec.message()
<< ", processing '-dependency_info "
<< depInfo->getValue()
<< "'\n";
}
}
// In -test_file_usage mode, we'll be given an explicit list of paths that
// exist. We'll also be expected to print out information about how we located
// libraries and so on that the user specified, but not to actually do any
// linking.
if (parsedArgs->getLastArg(OPT_test_file_usage)) {
ctx.setTestingFileUsage();
// With paths existing by fiat, linking is not going to end well.
ctx.setDoNothing(true);
// Only bother looking for an existence override if we're going to use it.
for (auto existingPath : parsedArgs->filtered(OPT_path_exists)) {
ctx.addExistingPathForDebug(existingPath->getValue());
}
}
// Register possible input file parsers.
if (!ctx.doNothing()) {
ctx.registry().addSupportMachOObjects(ctx);
ctx.registry().addSupportArchives(ctx.logInputFiles());
ctx.registry().addSupportYamlFiles();
}
// Now construct the set of library search directories, following ld64's
// baroque set of accumulated hacks. Mostly, the algorithm constructs
// { syslibroots } x { libpaths }
//
// Unfortunately, there are numerous exceptions:
// 1. Only absolute paths get modified by syslibroot options.
// 2. If there is just 1 -syslibroot, system paths not found in it are
// skipped.
// 3. If the last -syslibroot is "/", all of them are ignored entirely.
// 4. If { syslibroots } x path == {}, the original path is kept.
std::vector<StringRef> sysLibRoots;
for (auto syslibRoot : parsedArgs->filtered(OPT_syslibroot)) {
sysLibRoots.push_back(syslibRoot->getValue());
}
if (!sysLibRoots.empty()) {
// Ignore all if last -syslibroot is "/".
if (sysLibRoots.back() != "/")
ctx.setSysLibRoots(sysLibRoots);
}
// Paths specified with -L come first, and are not considered system paths for
// the case where there is precisely 1 -syslibroot.
for (auto libPath : parsedArgs->filtered(OPT_L)) {
ctx.addModifiedSearchDir(libPath->getValue());
}
// Process -F directories (where to look for frameworks).
for (auto fwPath : parsedArgs->filtered(OPT_F)) {
ctx.addFrameworkSearchDir(fwPath->getValue());
}
// -Z suppresses the standard search paths.
if (!parsedArgs->hasArg(OPT_Z)) {
ctx.addModifiedSearchDir("/usr/lib", true);
ctx.addModifiedSearchDir("/usr/local/lib", true);
ctx.addFrameworkSearchDir("/Library/Frameworks", true);
ctx.addFrameworkSearchDir("/System/Library/Frameworks", true);
}
// Now that we've constructed the final set of search paths, print out those
// search paths in verbose mode.
if (parsedArgs->getLastArg(OPT_v)) {
diagnostics << "Library search paths:\n";
for (auto path : ctx.searchDirs()) {
diagnostics << " " << path << '\n';
}
diagnostics << "Framework search paths:\n";
for (auto path : ctx.frameworkDirs()) {
diagnostics << " " << path << '\n';
}
}
// Handle -exported_symbols_list <file>
for (auto expFile : parsedArgs->filtered(OPT_exported_symbols_list)) {
if (ctx.exportMode() == MachOLinkingContext::ExportMode::blackList) {
diagnostics << "error: -exported_symbols_list cannot be combined "
<< "with -unexported_symbol[s_list]\n";
return false;
}
ctx.setExportMode(MachOLinkingContext::ExportMode::whiteList);
if (std::error_code ec = parseExportsList(expFile->getValue(), ctx,
diagnostics)) {
diagnostics << "error: " << ec.message()
<< ", processing '-exported_symbols_list "
<< expFile->getValue()
<< "'\n";
return false;
}
}
// Handle -exported_symbol <symbol>
for (auto symbol : parsedArgs->filtered(OPT_exported_symbol)) {
if (ctx.exportMode() == MachOLinkingContext::ExportMode::blackList) {
diagnostics << "error: -exported_symbol cannot be combined "
<< "with -unexported_symbol[s_list]\n";
return false;
}
ctx.setExportMode(MachOLinkingContext::ExportMode::whiteList);
ctx.addExportSymbol(symbol->getValue());
}
// Handle -unexported_symbols_list <file>
for (auto expFile : parsedArgs->filtered(OPT_unexported_symbols_list)) {
if (ctx.exportMode() == MachOLinkingContext::ExportMode::whiteList) {
diagnostics << "error: -unexported_symbols_list cannot be combined "
<< "with -exported_symbol[s_list]\n";
return false;
}
ctx.setExportMode(MachOLinkingContext::ExportMode::blackList);
if (std::error_code ec = parseExportsList(expFile->getValue(), ctx,
diagnostics)) {
diagnostics << "error: " << ec.message()
<< ", processing '-unexported_symbols_list "
<< expFile->getValue()
<< "'\n";
return false;
}
}
// Handle -unexported_symbol <symbol>
for (auto symbol : parsedArgs->filtered(OPT_unexported_symbol)) {
if (ctx.exportMode() == MachOLinkingContext::ExportMode::whiteList) {
diagnostics << "error: -unexported_symbol cannot be combined "
<< "with -exported_symbol[s_list]\n";
return false;
}
ctx.setExportMode(MachOLinkingContext::ExportMode::blackList);
ctx.addExportSymbol(symbol->getValue());
}
// Handle obosolete -multi_module and -single_module
if (llvm::opt::Arg *mod = parsedArgs->getLastArg(OPT_multi_module,
OPT_single_module)) {
if (mod->getOption().getID() == OPT_multi_module) {
diagnostics << "warning: -multi_module is obsolete and being ignored\n";
}
else {
if (ctx.outputMachOType() != llvm::MachO::MH_DYLIB) {
diagnostics << "warning: -single_module being ignored. "
"It is only for use when producing a dylib\n";
}
}
}
// Handle -pie or -no_pie
if (llvm::opt::Arg *pie = parsedArgs->getLastArg(OPT_pie, OPT_no_pie)) {
switch (ctx.outputMachOType()) {
case llvm::MachO::MH_EXECUTE:
switch (ctx.os()) {
case MachOLinkingContext::OS::macOSX:
if ((minOSVersion < 0x000A0500) &&
(pie->getOption().getID() == OPT_pie)) {
diagnostics << "-pie can only be used when targeting "
"Mac OS X 10.5 or later\n";
return false;
}
break;
case MachOLinkingContext::OS::iOS:
if ((minOSVersion < 0x00040200) &&
(pie->getOption().getID() == OPT_pie)) {
diagnostics << "-pie can only be used when targeting "
"iOS 4.2 or later\n";
return false;
}
break;
case MachOLinkingContext::OS::iOS_simulator:
if (pie->getOption().getID() == OPT_no_pie)
diagnostics << "iOS simulator programs must be built PIE\n";
return false;
break;
case MachOLinkingContext::OS::unknown:
break;
}
ctx.setPIE(pie->getOption().getID() == OPT_pie);
break;
case llvm::MachO::MH_PRELOAD:
break;
case llvm::MachO::MH_DYLIB:
case llvm::MachO::MH_BUNDLE:
diagnostics << "warning: " << pie->getSpelling() << " being ignored. "
<< "It is only used when linking main executables\n";
break;
default:
diagnostics << pie->getSpelling()
<< " can only used when linking main executables\n";
return false;
break;
}
}
// Handle debug info handling options: -S
if (parsedArgs->hasArg(OPT_S))
ctx.setDebugInfoMode(MachOLinkingContext::DebugInfoMode::noDebugMap);
// Handle -order_file <file>
for (auto orderFile : parsedArgs->filtered(OPT_order_file)) {
if (std::error_code ec = parseOrderFile(orderFile->getValue(), ctx,
diagnostics)) {
diagnostics << "error: " << ec.message()
<< ", processing '-order_file "
<< orderFile->getValue()
<< "'\n";
return false;
}
}
// Handle -rpath <path>
if (parsedArgs->hasArg(OPT_rpath)) {
switch (ctx.outputMachOType()) {
case llvm::MachO::MH_EXECUTE:
case llvm::MachO::MH_DYLIB:
case llvm::MachO::MH_BUNDLE:
if (!ctx.minOS("10.5", "2.0")) {
if (ctx.os() == MachOLinkingContext::OS::macOSX) {
diagnostics << "error: -rpath can only be used when targeting "
"OS X 10.5 or later\n";
} else {
diagnostics << "error: -rpath can only be used when targeting "
"iOS 2.0 or later\n";
}
return false;
}
break;
default:
diagnostics << "error: -rpath can only be used when creating "
"a dynamic final linked image\n";
return false;
}
for (auto rPath : parsedArgs->filtered(OPT_rpath)) {
ctx.addRpath(rPath->getValue());
}
}
// Handle input files
for (auto &arg : *parsedArgs) {
bool upward;
ErrorOr<StringRef> resolvedPath = StringRef();
switch (arg->getOption().getID()) {
default:
continue;
case OPT_INPUT:
addFile(arg->getValue(), ctx, globalWholeArchive, false, diagnostics);
break;
case OPT_upward_library:
addFile(arg->getValue(), ctx, false, true, diagnostics);
break;
case OPT_force_load:
addFile(arg->getValue(), ctx, true, false, diagnostics);
break;
case OPT_l:
case OPT_upward_l:
upward = (arg->getOption().getID() == OPT_upward_l);
resolvedPath = ctx.searchLibrary(arg->getValue());
if (!resolvedPath) {
diagnostics << "Unable to find library for " << arg->getSpelling()
<< arg->getValue() << "\n";
return false;
} else if (ctx.testingFileUsage()) {
diagnostics << "Found " << (upward ? "upward " : " ") << "library "
<< canonicalizePath(resolvedPath.get()) << '\n';
}
addFile(resolvedPath.get(), ctx, globalWholeArchive, upward, diagnostics);
break;
case OPT_framework:
case OPT_upward_framework:
upward = (arg->getOption().getID() == OPT_upward_framework);
resolvedPath = ctx.findPathForFramework(arg->getValue());
if (!resolvedPath) {
diagnostics << "Unable to find framework for "
<< arg->getSpelling() << " " << arg->getValue() << "\n";
return false;
} else if (ctx.testingFileUsage()) {
diagnostics << "Found " << (upward ? "upward " : " ") << "framework "
<< canonicalizePath(resolvedPath.get()) << '\n';
}
addFile(resolvedPath.get(), ctx, globalWholeArchive, upward, diagnostics);
break;
case OPT_filelist:
if (std::error_code ec = loadFileList(arg->getValue(),
ctx, globalWholeArchive,
diagnostics)) {
diagnostics << "error: " << ec.message()
<< ", processing '-filelist " << arg->getValue()
<< "'\n";
return false;
}
break;
}
}
if (ctx.getNodes().empty()) {
diagnostics << "No input files\n";
return false;
}
// Validate the combination of options used.
return ctx.validate(diagnostics);
}
} // namespace lld
Reference in New Issue View Git Blame Copy Permalink