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934 lines
30 KiB
934 lines
30 KiB
//===- DriverUtils.cpp ----------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file contains utility functions for the driver. Because there
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// are so many small functions, we created this separate file to make
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// Driver.cpp less cluttered.
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//
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//===----------------------------------------------------------------------===//
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#include "Config.h"
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#include "Driver.h"
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#include "Symbols.h"
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#include "lld/Common/ErrorHandler.h"
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#include "lld/Common/Memory.h"
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#include "llvm/ADT/Optional.h"
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#include "llvm/ADT/StringSwitch.h"
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#include "llvm/BinaryFormat/COFF.h"
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#include "llvm/Object/COFF.h"
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#include "llvm/Object/WindowsResource.h"
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#include "llvm/Option/Arg.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Option/Option.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/FileUtilities.h"
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#include "llvm/Support/MathExtras.h"
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#include "llvm/Support/Process.h"
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#include "llvm/Support/Program.h"
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#include "llvm/Support/raw_ostream.h"
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#include "llvm/WindowsManifest/WindowsManifestMerger.h"
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#include <limits>
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#include <memory>
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using namespace llvm::COFF;
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using namespace llvm;
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using llvm::sys::Process;
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namespace lld {
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namespace coff {
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namespace {
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const uint16_t SUBLANG_ENGLISH_US = 0x0409;
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const uint16_t RT_MANIFEST = 24;
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class Executor {
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public:
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explicit Executor(StringRef s) : prog(saver.save(s)) {}
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void add(StringRef s) { args.push_back(saver.save(s)); }
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void add(std::string &s) { args.push_back(saver.save(s)); }
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void add(Twine s) { args.push_back(saver.save(s)); }
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void add(const char *s) { args.push_back(saver.save(s)); }
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void run() {
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ErrorOr<std::string> exeOrErr = sys::findProgramByName(prog);
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if (auto ec = exeOrErr.getError())
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fatal("unable to find " + prog + " in PATH: " + ec.message());
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StringRef exe = saver.save(*exeOrErr);
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args.insert(args.begin(), exe);
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if (sys::ExecuteAndWait(args[0], args) != 0)
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fatal("ExecuteAndWait failed: " +
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llvm::join(args.begin(), args.end(), " "));
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}
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private:
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StringRef prog;
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std::vector<StringRef> args;
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};
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} // anonymous namespace
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// Parses a string in the form of "<integer>[,<integer>]".
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void parseNumbers(StringRef arg, uint64_t *addr, uint64_t *size) {
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StringRef s1, s2;
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std::tie(s1, s2) = arg.split(',');
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if (s1.getAsInteger(0, *addr))
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fatal("invalid number: " + s1);
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if (size && !s2.empty() && s2.getAsInteger(0, *size))
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fatal("invalid number: " + s2);
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}
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// Parses a string in the form of "<integer>[.<integer>]".
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// If second number is not present, Minor is set to 0.
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void parseVersion(StringRef arg, uint32_t *major, uint32_t *minor) {
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StringRef s1, s2;
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std::tie(s1, s2) = arg.split('.');
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if (s1.getAsInteger(10, *major))
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fatal("invalid number: " + s1);
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*minor = 0;
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if (!s2.empty() && s2.getAsInteger(10, *minor))
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fatal("invalid number: " + s2);
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}
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void parseGuard(StringRef fullArg) {
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SmallVector<StringRef, 1> splitArgs;
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fullArg.split(splitArgs, ",");
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for (StringRef arg : splitArgs) {
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if (arg.equals_lower("no"))
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config->guardCF = GuardCFLevel::Off;
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else if (arg.equals_lower("nolongjmp"))
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config->guardCF = GuardCFLevel::NoLongJmp;
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else if (arg.equals_lower("cf") || arg.equals_lower("longjmp"))
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config->guardCF = GuardCFLevel::Full;
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else
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fatal("invalid argument to /guard: " + arg);
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}
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}
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// Parses a string in the form of "<subsystem>[,<integer>[.<integer>]]".
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void parseSubsystem(StringRef arg, WindowsSubsystem *sys, uint32_t *major,
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uint32_t *minor, bool *gotVersion) {
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StringRef sysStr, ver;
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std::tie(sysStr, ver) = arg.split(',');
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std::string sysStrLower = sysStr.lower();
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*sys = StringSwitch<WindowsSubsystem>(sysStrLower)
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.Case("boot_application", IMAGE_SUBSYSTEM_WINDOWS_BOOT_APPLICATION)
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.Case("console", IMAGE_SUBSYSTEM_WINDOWS_CUI)
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.Case("default", IMAGE_SUBSYSTEM_UNKNOWN)
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.Case("efi_application", IMAGE_SUBSYSTEM_EFI_APPLICATION)
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.Case("efi_boot_service_driver", IMAGE_SUBSYSTEM_EFI_BOOT_SERVICE_DRIVER)
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.Case("efi_rom", IMAGE_SUBSYSTEM_EFI_ROM)
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.Case("efi_runtime_driver", IMAGE_SUBSYSTEM_EFI_RUNTIME_DRIVER)
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.Case("native", IMAGE_SUBSYSTEM_NATIVE)
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.Case("posix", IMAGE_SUBSYSTEM_POSIX_CUI)
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.Case("windows", IMAGE_SUBSYSTEM_WINDOWS_GUI)
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.Default(IMAGE_SUBSYSTEM_UNKNOWN);
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if (*sys == IMAGE_SUBSYSTEM_UNKNOWN && sysStrLower != "default")
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fatal("unknown subsystem: " + sysStr);
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if (!ver.empty())
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parseVersion(ver, major, minor);
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if (gotVersion)
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*gotVersion = !ver.empty();
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}
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// Parse a string of the form of "<from>=<to>".
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// Results are directly written to Config.
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void parseAlternateName(StringRef s) {
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StringRef from, to;
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std::tie(from, to) = s.split('=');
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if (from.empty() || to.empty())
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fatal("/alternatename: invalid argument: " + s);
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auto it = config->alternateNames.find(from);
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if (it != config->alternateNames.end() && it->second != to)
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fatal("/alternatename: conflicts: " + s);
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config->alternateNames.insert(it, std::make_pair(from, to));
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}
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// Parse a string of the form of "<from>=<to>".
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// Results are directly written to Config.
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void parseMerge(StringRef s) {
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StringRef from, to;
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std::tie(from, to) = s.split('=');
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if (from.empty() || to.empty())
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fatal("/merge: invalid argument: " + s);
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if (from == ".rsrc" || to == ".rsrc")
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fatal("/merge: cannot merge '.rsrc' with any section");
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if (from == ".reloc" || to == ".reloc")
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fatal("/merge: cannot merge '.reloc' with any section");
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auto pair = config->merge.insert(std::make_pair(from, to));
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bool inserted = pair.second;
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if (!inserted) {
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StringRef existing = pair.first->second;
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if (existing != to)
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warn(s + ": already merged into " + existing);
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}
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}
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static uint32_t parseSectionAttributes(StringRef s) {
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uint32_t ret = 0;
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for (char c : s.lower()) {
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switch (c) {
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case 'd':
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ret |= IMAGE_SCN_MEM_DISCARDABLE;
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break;
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case 'e':
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ret |= IMAGE_SCN_MEM_EXECUTE;
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break;
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case 'k':
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ret |= IMAGE_SCN_MEM_NOT_CACHED;
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break;
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case 'p':
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ret |= IMAGE_SCN_MEM_NOT_PAGED;
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break;
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case 'r':
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ret |= IMAGE_SCN_MEM_READ;
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break;
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case 's':
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ret |= IMAGE_SCN_MEM_SHARED;
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break;
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case 'w':
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ret |= IMAGE_SCN_MEM_WRITE;
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break;
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default:
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fatal("/section: invalid argument: " + s);
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}
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}
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return ret;
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}
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// Parses /section option argument.
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void parseSection(StringRef s) {
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StringRef name, attrs;
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std::tie(name, attrs) = s.split(',');
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if (name.empty() || attrs.empty())
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fatal("/section: invalid argument: " + s);
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config->section[name] = parseSectionAttributes(attrs);
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}
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// Parses /aligncomm option argument.
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void parseAligncomm(StringRef s) {
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StringRef name, align;
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std::tie(name, align) = s.split(',');
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if (name.empty() || align.empty()) {
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error("/aligncomm: invalid argument: " + s);
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return;
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}
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int v;
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if (align.getAsInteger(0, v)) {
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error("/aligncomm: invalid argument: " + s);
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return;
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}
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config->alignComm[std::string(name)] =
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std::max(config->alignComm[std::string(name)], 1 << v);
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}
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// Parses /functionpadmin option argument.
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void parseFunctionPadMin(llvm::opt::Arg *a, llvm::COFF::MachineTypes machine) {
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StringRef arg = a->getNumValues() ? a->getValue() : "";
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if (!arg.empty()) {
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// Optional padding in bytes is given.
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if (arg.getAsInteger(0, config->functionPadMin))
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error("/functionpadmin: invalid argument: " + arg);
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return;
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}
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// No optional argument given.
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// Set default padding based on machine, similar to link.exe.
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// There is no default padding for ARM platforms.
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if (machine == I386) {
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config->functionPadMin = 5;
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} else if (machine == AMD64) {
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config->functionPadMin = 6;
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} else {
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error("/functionpadmin: invalid argument for this machine: " + arg);
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}
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}
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// Parses a string in the form of "EMBED[,=<integer>]|NO".
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// Results are directly written to Config.
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void parseManifest(StringRef arg) {
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if (arg.equals_lower("no")) {
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config->manifest = Configuration::No;
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return;
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}
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if (!arg.startswith_lower("embed"))
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fatal("invalid option " + arg);
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config->manifest = Configuration::Embed;
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arg = arg.substr(strlen("embed"));
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if (arg.empty())
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return;
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if (!arg.startswith_lower(",id="))
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fatal("invalid option " + arg);
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arg = arg.substr(strlen(",id="));
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if (arg.getAsInteger(0, config->manifestID))
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fatal("invalid option " + arg);
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}
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// Parses a string in the form of "level=<string>|uiAccess=<string>|NO".
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// Results are directly written to Config.
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void parseManifestUAC(StringRef arg) {
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if (arg.equals_lower("no")) {
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config->manifestUAC = false;
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return;
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}
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for (;;) {
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arg = arg.ltrim();
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if (arg.empty())
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return;
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if (arg.startswith_lower("level=")) {
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arg = arg.substr(strlen("level="));
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std::tie(config->manifestLevel, arg) = arg.split(" ");
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continue;
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}
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if (arg.startswith_lower("uiaccess=")) {
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arg = arg.substr(strlen("uiaccess="));
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std::tie(config->manifestUIAccess, arg) = arg.split(" ");
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continue;
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}
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fatal("invalid option " + arg);
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}
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}
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// Parses a string in the form of "cd|net[,(cd|net)]*"
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// Results are directly written to Config.
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void parseSwaprun(StringRef arg) {
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do {
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StringRef swaprun, newArg;
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std::tie(swaprun, newArg) = arg.split(',');
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if (swaprun.equals_lower("cd"))
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config->swaprunCD = true;
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else if (swaprun.equals_lower("net"))
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config->swaprunNet = true;
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else if (swaprun.empty())
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error("/swaprun: missing argument");
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else
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error("/swaprun: invalid argument: " + swaprun);
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// To catch trailing commas, e.g. `/spawrun:cd,`
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if (newArg.empty() && arg.endswith(","))
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error("/swaprun: missing argument");
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arg = newArg;
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} while (!arg.empty());
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}
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// An RAII temporary file class that automatically removes a temporary file.
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namespace {
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class TemporaryFile {
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public:
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TemporaryFile(StringRef prefix, StringRef extn, StringRef contents = "") {
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SmallString<128> s;
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if (auto ec = sys::fs::createTemporaryFile("lld-" + prefix, extn, s))
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fatal("cannot create a temporary file: " + ec.message());
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path = std::string(s.str());
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if (!contents.empty()) {
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std::error_code ec;
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raw_fd_ostream os(path, ec, sys::fs::OF_None);
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if (ec)
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fatal("failed to open " + path + ": " + ec.message());
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os << contents;
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}
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}
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TemporaryFile(TemporaryFile &&obj) {
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std::swap(path, obj.path);
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}
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~TemporaryFile() {
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if (path.empty())
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return;
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if (sys::fs::remove(path))
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fatal("failed to remove " + path);
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}
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// Returns a memory buffer of this temporary file.
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// Note that this function does not leave the file open,
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// so it is safe to remove the file immediately after this function
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// is called (you cannot remove an opened file on Windows.)
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std::unique_ptr<MemoryBuffer> getMemoryBuffer() {
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// IsVolatile=true forces MemoryBuffer to not use mmap().
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return CHECK(MemoryBuffer::getFile(path, /*FileSize=*/-1,
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/*RequiresNullTerminator=*/false,
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/*IsVolatile=*/true),
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"could not open " + path);
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}
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std::string path;
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};
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}
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static std::string createDefaultXml() {
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std::string ret;
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raw_string_ostream os(ret);
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// Emit the XML. Note that we do *not* verify that the XML attributes are
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// syntactically correct. This is intentional for link.exe compatibility.
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os << "<?xml version=\"1.0\" standalone=\"yes\"?>\n"
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<< "<assembly xmlns=\"urn:schemas-microsoft-com:asm.v1\"\n"
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<< " manifestVersion=\"1.0\">\n";
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if (config->manifestUAC) {
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os << " <trustInfo>\n"
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<< " <security>\n"
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<< " <requestedPrivileges>\n"
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<< " <requestedExecutionLevel level=" << config->manifestLevel
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<< " uiAccess=" << config->manifestUIAccess << "/>\n"
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<< " </requestedPrivileges>\n"
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<< " </security>\n"
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<< " </trustInfo>\n";
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}
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if (!config->manifestDependency.empty()) {
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os << " <dependency>\n"
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<< " <dependentAssembly>\n"
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<< " <assemblyIdentity " << config->manifestDependency << " />\n"
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<< " </dependentAssembly>\n"
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<< " </dependency>\n";
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}
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os << "</assembly>\n";
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return os.str();
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}
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static std::string createManifestXmlWithInternalMt(StringRef defaultXml) {
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std::unique_ptr<MemoryBuffer> defaultXmlCopy =
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MemoryBuffer::getMemBufferCopy(defaultXml);
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windows_manifest::WindowsManifestMerger merger;
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if (auto e = merger.merge(*defaultXmlCopy.get()))
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fatal("internal manifest tool failed on default xml: " +
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toString(std::move(e)));
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for (StringRef filename : config->manifestInput) {
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std::unique_ptr<MemoryBuffer> manifest =
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check(MemoryBuffer::getFile(filename));
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if (auto e = merger.merge(*manifest.get()))
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fatal("internal manifest tool failed on file " + filename + ": " +
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toString(std::move(e)));
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|
}
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return std::string(merger.getMergedManifest().get()->getBuffer());
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|
}
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|
static std::string createManifestXmlWithExternalMt(StringRef defaultXml) {
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// Create the default manifest file as a temporary file.
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|
TemporaryFile Default("defaultxml", "manifest");
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|
std::error_code ec;
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|
raw_fd_ostream os(Default.path, ec, sys::fs::OF_Text);
|
|
if (ec)
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|
fatal("failed to open " + Default.path + ": " + ec.message());
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|
os << defaultXml;
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|
os.close();
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|
|
|
// Merge user-supplied manifests if they are given. Since libxml2 is not
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// enabled, we must shell out to Microsoft's mt.exe tool.
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TemporaryFile user("user", "manifest");
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|
Executor e("mt.exe");
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e.add("/manifest");
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e.add(Default.path);
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for (StringRef filename : config->manifestInput) {
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e.add("/manifest");
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e.add(filename);
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}
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e.add("/nologo");
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|
e.add("/out:" + StringRef(user.path));
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|
e.run();
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|
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|
return std::string(
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CHECK(MemoryBuffer::getFile(user.path), "could not open " + user.path)
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|
.get()
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|
->getBuffer());
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|
}
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|
|
|
static std::string createManifestXml() {
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|
std::string defaultXml = createDefaultXml();
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|
if (config->manifestInput.empty())
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|
return defaultXml;
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|
|
|
if (windows_manifest::isAvailable())
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|
return createManifestXmlWithInternalMt(defaultXml);
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|
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|
return createManifestXmlWithExternalMt(defaultXml);
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|
}
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|
|
|
static std::unique_ptr<WritableMemoryBuffer>
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|
createMemoryBufferForManifestRes(size_t manifestSize) {
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|
size_t resSize = alignTo(
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|
object::WIN_RES_MAGIC_SIZE + object::WIN_RES_NULL_ENTRY_SIZE +
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|
sizeof(object::WinResHeaderPrefix) + sizeof(object::WinResIDs) +
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|
sizeof(object::WinResHeaderSuffix) + manifestSize,
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|
object::WIN_RES_DATA_ALIGNMENT);
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|
return WritableMemoryBuffer::getNewMemBuffer(resSize, config->outputFile +
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|
".manifest.res");
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|
}
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|
|
|
static void writeResFileHeader(char *&buf) {
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|
memcpy(buf, COFF::WinResMagic, sizeof(COFF::WinResMagic));
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|
buf += sizeof(COFF::WinResMagic);
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|
memset(buf, 0, object::WIN_RES_NULL_ENTRY_SIZE);
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|
buf += object::WIN_RES_NULL_ENTRY_SIZE;
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|
}
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|
|
|
static void writeResEntryHeader(char *&buf, size_t manifestSize) {
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|
// Write the prefix.
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|
auto *prefix = reinterpret_cast<object::WinResHeaderPrefix *>(buf);
|
|
prefix->DataSize = manifestSize;
|
|
prefix->HeaderSize = sizeof(object::WinResHeaderPrefix) +
|
|
sizeof(object::WinResIDs) +
|
|
sizeof(object::WinResHeaderSuffix);
|
|
buf += sizeof(object::WinResHeaderPrefix);
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|
|
|
// Write the Type/Name IDs.
|
|
auto *iDs = reinterpret_cast<object::WinResIDs *>(buf);
|
|
iDs->setType(RT_MANIFEST);
|
|
iDs->setName(config->manifestID);
|
|
buf += sizeof(object::WinResIDs);
|
|
|
|
// Write the suffix.
|
|
auto *suffix = reinterpret_cast<object::WinResHeaderSuffix *>(buf);
|
|
suffix->DataVersion = 0;
|
|
suffix->MemoryFlags = object::WIN_RES_PURE_MOVEABLE;
|
|
suffix->Language = SUBLANG_ENGLISH_US;
|
|
suffix->Version = 0;
|
|
suffix->Characteristics = 0;
|
|
buf += sizeof(object::WinResHeaderSuffix);
|
|
}
|
|
|
|
// Create a resource file containing a manifest XML.
|
|
std::unique_ptr<MemoryBuffer> createManifestRes() {
|
|
std::string manifest = createManifestXml();
|
|
|
|
std::unique_ptr<WritableMemoryBuffer> res =
|
|
createMemoryBufferForManifestRes(manifest.size());
|
|
|
|
char *buf = res->getBufferStart();
|
|
writeResFileHeader(buf);
|
|
writeResEntryHeader(buf, manifest.size());
|
|
|
|
// Copy the manifest data into the .res file.
|
|
std::copy(manifest.begin(), manifest.end(), buf);
|
|
return std::move(res);
|
|
}
|
|
|
|
void createSideBySideManifest() {
|
|
std::string path = std::string(config->manifestFile);
|
|
if (path == "")
|
|
path = config->outputFile + ".manifest";
|
|
std::error_code ec;
|
|
raw_fd_ostream out(path, ec, sys::fs::OF_Text);
|
|
if (ec)
|
|
fatal("failed to create manifest: " + ec.message());
|
|
out << createManifestXml();
|
|
}
|
|
|
|
// Parse a string in the form of
|
|
// "<name>[=<internalname>][,@ordinal[,NONAME]][,DATA][,PRIVATE]"
|
|
// or "<name>=<dllname>.<name>".
|
|
// Used for parsing /export arguments.
|
|
Export parseExport(StringRef arg) {
|
|
Export e;
|
|
StringRef rest;
|
|
std::tie(e.name, rest) = arg.split(",");
|
|
if (e.name.empty())
|
|
goto err;
|
|
|
|
if (e.name.contains('=')) {
|
|
StringRef x, y;
|
|
std::tie(x, y) = e.name.split("=");
|
|
|
|
// If "<name>=<dllname>.<name>".
|
|
if (y.contains(".")) {
|
|
e.name = x;
|
|
e.forwardTo = y;
|
|
return e;
|
|
}
|
|
|
|
e.extName = x;
|
|
e.name = y;
|
|
if (e.name.empty())
|
|
goto err;
|
|
}
|
|
|
|
// If "<name>=<internalname>[,@ordinal[,NONAME]][,DATA][,PRIVATE]"
|
|
while (!rest.empty()) {
|
|
StringRef tok;
|
|
std::tie(tok, rest) = rest.split(",");
|
|
if (tok.equals_lower("noname")) {
|
|
if (e.ordinal == 0)
|
|
goto err;
|
|
e.noname = true;
|
|
continue;
|
|
}
|
|
if (tok.equals_lower("data")) {
|
|
e.data = true;
|
|
continue;
|
|
}
|
|
if (tok.equals_lower("constant")) {
|
|
e.constant = true;
|
|
continue;
|
|
}
|
|
if (tok.equals_lower("private")) {
|
|
e.isPrivate = true;
|
|
continue;
|
|
}
|
|
if (tok.startswith("@")) {
|
|
int32_t ord;
|
|
if (tok.substr(1).getAsInteger(0, ord))
|
|
goto err;
|
|
if (ord <= 0 || 65535 < ord)
|
|
goto err;
|
|
e.ordinal = ord;
|
|
continue;
|
|
}
|
|
goto err;
|
|
}
|
|
return e;
|
|
|
|
err:
|
|
fatal("invalid /export: " + arg);
|
|
}
|
|
|
|
static StringRef undecorate(StringRef sym) {
|
|
if (config->machine != I386)
|
|
return sym;
|
|
// In MSVC mode, a fully decorated stdcall function is exported
|
|
// as-is with the leading underscore (with type IMPORT_NAME).
|
|
// In MinGW mode, a decorated stdcall function gets the underscore
|
|
// removed, just like normal cdecl functions.
|
|
if (sym.startswith("_") && sym.contains('@') && !config->mingw)
|
|
return sym;
|
|
return sym.startswith("_") ? sym.substr(1) : sym;
|
|
}
|
|
|
|
// Convert stdcall/fastcall style symbols into unsuffixed symbols,
|
|
// with or without a leading underscore. (MinGW specific.)
|
|
static StringRef killAt(StringRef sym, bool prefix) {
|
|
if (sym.empty())
|
|
return sym;
|
|
// Strip any trailing stdcall suffix
|
|
sym = sym.substr(0, sym.find('@', 1));
|
|
if (!sym.startswith("@")) {
|
|
if (prefix && !sym.startswith("_"))
|
|
return saver.save("_" + sym);
|
|
return sym;
|
|
}
|
|
// For fastcall, remove the leading @ and replace it with an
|
|
// underscore, if prefixes are used.
|
|
sym = sym.substr(1);
|
|
if (prefix)
|
|
sym = saver.save("_" + sym);
|
|
return sym;
|
|
}
|
|
|
|
// Performs error checking on all /export arguments.
|
|
// It also sets ordinals.
|
|
void fixupExports() {
|
|
// Symbol ordinals must be unique.
|
|
std::set<uint16_t> ords;
|
|
for (Export &e : config->exports) {
|
|
if (e.ordinal == 0)
|
|
continue;
|
|
if (!ords.insert(e.ordinal).second)
|
|
fatal("duplicate export ordinal: " + e.name);
|
|
}
|
|
|
|
for (Export &e : config->exports) {
|
|
if (!e.forwardTo.empty()) {
|
|
e.exportName = undecorate(e.name);
|
|
} else {
|
|
e.exportName = undecorate(e.extName.empty() ? e.name : e.extName);
|
|
}
|
|
}
|
|
|
|
if (config->killAt && config->machine == I386) {
|
|
for (Export &e : config->exports) {
|
|
e.name = killAt(e.name, true);
|
|
e.exportName = killAt(e.exportName, false);
|
|
e.extName = killAt(e.extName, true);
|
|
e.symbolName = killAt(e.symbolName, true);
|
|
}
|
|
}
|
|
|
|
// Uniquefy by name.
|
|
DenseMap<StringRef, Export *> map(config->exports.size());
|
|
std::vector<Export> v;
|
|
for (Export &e : config->exports) {
|
|
auto pair = map.insert(std::make_pair(e.exportName, &e));
|
|
bool inserted = pair.second;
|
|
if (inserted) {
|
|
v.push_back(e);
|
|
continue;
|
|
}
|
|
Export *existing = pair.first->second;
|
|
if (e == *existing || e.name != existing->name)
|
|
continue;
|
|
warn("duplicate /export option: " + e.name);
|
|
}
|
|
config->exports = std::move(v);
|
|
|
|
// Sort by name.
|
|
std::sort(config->exports.begin(), config->exports.end(),
|
|
[](const Export &a, const Export &b) {
|
|
return a.exportName < b.exportName;
|
|
});
|
|
}
|
|
|
|
void assignExportOrdinals() {
|
|
// Assign unique ordinals if default (= 0).
|
|
uint32_t max = 0;
|
|
for (Export &e : config->exports)
|
|
max = std::max(max, (uint32_t)e.ordinal);
|
|
for (Export &e : config->exports)
|
|
if (e.ordinal == 0)
|
|
e.ordinal = ++max;
|
|
if (max > std::numeric_limits<uint16_t>::max())
|
|
fatal("too many exported symbols (max " +
|
|
Twine(std::numeric_limits<uint16_t>::max()) + ")");
|
|
}
|
|
|
|
// Parses a string in the form of "key=value" and check
|
|
// if value matches previous values for the same key.
|
|
void checkFailIfMismatch(StringRef arg, InputFile *source) {
|
|
StringRef k, v;
|
|
std::tie(k, v) = arg.split('=');
|
|
if (k.empty() || v.empty())
|
|
fatal("/failifmismatch: invalid argument: " + arg);
|
|
std::pair<StringRef, InputFile *> existing = config->mustMatch[k];
|
|
if (!existing.first.empty() && v != existing.first) {
|
|
std::string sourceStr = source ? toString(source) : "cmd-line";
|
|
std::string existingStr =
|
|
existing.second ? toString(existing.second) : "cmd-line";
|
|
fatal("/failifmismatch: mismatch detected for '" + k + "':\n>>> " +
|
|
existingStr + " has value " + existing.first + "\n>>> " + sourceStr +
|
|
" has value " + v);
|
|
}
|
|
config->mustMatch[k] = {v, source};
|
|
}
|
|
|
|
// Convert Windows resource files (.res files) to a .obj file.
|
|
// Does what cvtres.exe does, but in-process and cross-platform.
|
|
MemoryBufferRef convertResToCOFF(ArrayRef<MemoryBufferRef> mbs,
|
|
ArrayRef<ObjFile *> objs) {
|
|
object::WindowsResourceParser parser(/* MinGW */ config->mingw);
|
|
|
|
std::vector<std::string> duplicates;
|
|
for (MemoryBufferRef mb : mbs) {
|
|
std::unique_ptr<object::Binary> bin = check(object::createBinary(mb));
|
|
object::WindowsResource *rf = dyn_cast<object::WindowsResource>(bin.get());
|
|
if (!rf)
|
|
fatal("cannot compile non-resource file as resource");
|
|
|
|
if (auto ec = parser.parse(rf, duplicates))
|
|
fatal(toString(std::move(ec)));
|
|
}
|
|
|
|
// Note: This processes all .res files before all objs. Ideally they'd be
|
|
// handled in the same order they were linked (to keep the right one, if
|
|
// there are duplicates that are tolerated due to forceMultipleRes).
|
|
for (ObjFile *f : objs) {
|
|
object::ResourceSectionRef rsf;
|
|
if (auto ec = rsf.load(f->getCOFFObj()))
|
|
fatal(toString(f) + ": " + toString(std::move(ec)));
|
|
|
|
if (auto ec = parser.parse(rsf, f->getName(), duplicates))
|
|
fatal(toString(std::move(ec)));
|
|
}
|
|
|
|
if (config->mingw)
|
|
parser.cleanUpManifests(duplicates);
|
|
|
|
for (const auto &dupeDiag : duplicates)
|
|
if (config->forceMultipleRes)
|
|
warn(dupeDiag);
|
|
else
|
|
error(dupeDiag);
|
|
|
|
Expected<std::unique_ptr<MemoryBuffer>> e =
|
|
llvm::object::writeWindowsResourceCOFF(config->machine, parser,
|
|
config->timestamp);
|
|
if (!e)
|
|
fatal("failed to write .res to COFF: " + toString(e.takeError()));
|
|
|
|
MemoryBufferRef mbref = **e;
|
|
make<std::unique_ptr<MemoryBuffer>>(std::move(*e)); // take ownership
|
|
return mbref;
|
|
}
|
|
|
|
// Create OptTable
|
|
|
|
// Create prefix string literals used in Options.td
|
|
#define PREFIX(NAME, VALUE) const char *const NAME[] = VALUE;
|
|
#include "Options.inc"
|
|
#undef PREFIX
|
|
|
|
// Create table mapping all options defined in Options.td
|
|
static const llvm::opt::OptTable::Info infoTable[] = {
|
|
#define OPTION(X1, X2, ID, KIND, GROUP, ALIAS, X7, X8, X9, X10, X11, X12) \
|
|
{X1, X2, X10, X11, OPT_##ID, llvm::opt::Option::KIND##Class, \
|
|
X9, X8, OPT_##GROUP, OPT_##ALIAS, X7, X12},
|
|
#include "Options.inc"
|
|
#undef OPTION
|
|
};
|
|
|
|
COFFOptTable::COFFOptTable() : OptTable(infoTable, true) {}
|
|
|
|
COFFOptTable optTable;
|
|
|
|
// Set color diagnostics according to --color-diagnostics={auto,always,never}
|
|
// or --no-color-diagnostics flags.
|
|
static void handleColorDiagnostics(opt::InputArgList &args) {
|
|
auto *arg = args.getLastArg(OPT_color_diagnostics, OPT_color_diagnostics_eq,
|
|
OPT_no_color_diagnostics);
|
|
if (!arg)
|
|
return;
|
|
if (arg->getOption().getID() == OPT_color_diagnostics) {
|
|
lld::errs().enable_colors(true);
|
|
} else if (arg->getOption().getID() == OPT_no_color_diagnostics) {
|
|
lld::errs().enable_colors(false);
|
|
} else {
|
|
StringRef s = arg->getValue();
|
|
if (s == "always")
|
|
lld::errs().enable_colors(true);
|
|
else if (s == "never")
|
|
lld::errs().enable_colors(false);
|
|
else if (s != "auto")
|
|
error("unknown option: --color-diagnostics=" + s);
|
|
}
|
|
}
|
|
|
|
static cl::TokenizerCallback getQuotingStyle(opt::InputArgList &args) {
|
|
if (auto *arg = args.getLastArg(OPT_rsp_quoting)) {
|
|
StringRef s = arg->getValue();
|
|
if (s != "windows" && s != "posix")
|
|
error("invalid response file quoting: " + s);
|
|
if (s == "windows")
|
|
return cl::TokenizeWindowsCommandLine;
|
|
return cl::TokenizeGNUCommandLine;
|
|
}
|
|
// The COFF linker always defaults to Windows quoting.
|
|
return cl::TokenizeWindowsCommandLine;
|
|
}
|
|
|
|
// Parses a given list of options.
|
|
opt::InputArgList ArgParser::parse(ArrayRef<const char *> argv) {
|
|
// Make InputArgList from string vectors.
|
|
unsigned missingIndex;
|
|
unsigned missingCount;
|
|
|
|
// We need to get the quoting style for response files before parsing all
|
|
// options so we parse here before and ignore all the options but
|
|
// --rsp-quoting and /lldignoreenv.
|
|
// (This means --rsp-quoting can't be added through %LINK%.)
|
|
opt::InputArgList args = optTable.ParseArgs(argv, missingIndex, missingCount);
|
|
|
|
// Expand response files (arguments in the form of @<filename>) and insert
|
|
// flags from %LINK% and %_LINK_%, and then parse the argument again.
|
|
SmallVector<const char *, 256> expandedArgv(argv.data(),
|
|
argv.data() + argv.size());
|
|
if (!args.hasArg(OPT_lldignoreenv))
|
|
addLINK(expandedArgv);
|
|
cl::ExpandResponseFiles(saver, getQuotingStyle(args), expandedArgv);
|
|
args = optTable.ParseArgs(makeArrayRef(expandedArgv).drop_front(),
|
|
missingIndex, missingCount);
|
|
|
|
// Print the real command line if response files are expanded.
|
|
if (args.hasArg(OPT_verbose) && argv.size() != expandedArgv.size()) {
|
|
std::string msg = "Command line:";
|
|
for (const char *s : expandedArgv)
|
|
msg += " " + std::string(s);
|
|
message(msg);
|
|
}
|
|
|
|
// Save the command line after response file expansion so we can write it to
|
|
// the PDB if necessary.
|
|
config->argv = {expandedArgv.begin(), expandedArgv.end()};
|
|
|
|
// Handle /WX early since it converts missing argument warnings to errors.
|
|
errorHandler().fatalWarnings = args.hasFlag(OPT_WX, OPT_WX_no, false);
|
|
|
|
if (missingCount)
|
|
fatal(Twine(args.getArgString(missingIndex)) + ": missing argument");
|
|
|
|
handleColorDiagnostics(args);
|
|
|
|
for (opt::Arg *arg : args.filtered(OPT_UNKNOWN)) {
|
|
std::string nearest;
|
|
if (optTable.findNearest(arg->getAsString(args), nearest) > 1)
|
|
warn("ignoring unknown argument '" + arg->getAsString(args) + "'");
|
|
else
|
|
warn("ignoring unknown argument '" + arg->getAsString(args) +
|
|
"', did you mean '" + nearest + "'");
|
|
}
|
|
|
|
if (args.hasArg(OPT_lib))
|
|
warn("ignoring /lib since it's not the first argument");
|
|
|
|
return args;
|
|
}
|
|
|
|
// Tokenizes and parses a given string as command line in .drective section.
|
|
ParsedDirectives ArgParser::parseDirectives(StringRef s) {
|
|
ParsedDirectives result;
|
|
SmallVector<const char *, 16> rest;
|
|
|
|
// Handle /EXPORT and /INCLUDE in a fast path. These directives can appear for
|
|
// potentially every symbol in the object, so they must be handled quickly.
|
|
SmallVector<StringRef, 16> tokens;
|
|
cl::TokenizeWindowsCommandLineNoCopy(s, saver, tokens);
|
|
for (StringRef tok : tokens) {
|
|
if (tok.startswith_lower("/export:") || tok.startswith_lower("-export:"))
|
|
result.exports.push_back(tok.substr(strlen("/export:")));
|
|
else if (tok.startswith_lower("/include:") ||
|
|
tok.startswith_lower("-include:"))
|
|
result.includes.push_back(tok.substr(strlen("/include:")));
|
|
else {
|
|
// Save non-null-terminated strings to make proper C strings.
|
|
bool HasNul = tok.data()[tok.size()] == '\0';
|
|
rest.push_back(HasNul ? tok.data() : saver.save(tok).data());
|
|
}
|
|
}
|
|
|
|
// Make InputArgList from unparsed string vectors.
|
|
unsigned missingIndex;
|
|
unsigned missingCount;
|
|
|
|
result.args = optTable.ParseArgs(rest, missingIndex, missingCount);
|
|
|
|
if (missingCount)
|
|
fatal(Twine(result.args.getArgString(missingIndex)) + ": missing argument");
|
|
for (auto *arg : result.args.filtered(OPT_UNKNOWN))
|
|
warn("ignoring unknown argument: " + arg->getAsString(result.args));
|
|
return result;
|
|
}
|
|
|
|
// link.exe has an interesting feature. If LINK or _LINK_ environment
|
|
// variables exist, their contents are handled as command line strings.
|
|
// So you can pass extra arguments using them.
|
|
void ArgParser::addLINK(SmallVector<const char *, 256> &argv) {
|
|
// Concatenate LINK env and command line arguments, and then parse them.
|
|
if (Optional<std::string> s = Process::GetEnv("LINK")) {
|
|
std::vector<const char *> v = tokenize(*s);
|
|
argv.insert(std::next(argv.begin()), v.begin(), v.end());
|
|
}
|
|
if (Optional<std::string> s = Process::GetEnv("_LINK_")) {
|
|
std::vector<const char *> v = tokenize(*s);
|
|
argv.insert(std::next(argv.begin()), v.begin(), v.end());
|
|
}
|
|
}
|
|
|
|
std::vector<const char *> ArgParser::tokenize(StringRef s) {
|
|
SmallVector<const char *, 16> tokens;
|
|
cl::TokenizeWindowsCommandLine(s, saver, tokens);
|
|
return std::vector<const char *>(tokens.begin(), tokens.end());
|
|
}
|
|
|
|
void printHelp(const char *argv0) {
|
|
optTable.PrintHelp(lld::outs(),
|
|
(std::string(argv0) + " [options] file...").c_str(),
|
|
"LLVM Linker", false);
|
|
}
|
|
|
|
} // namespace coff
|
|
} // namespace lld
|