clang/lib/Driver/ToolChains/CSKYToolChain.cpp

   1 //===--- CSKYToolchain.cpp - CSKY ToolChain Implementations ---*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "CSKYToolChain.h"
  10 #include "CommonArgs.h"
  11 #include "clang/Driver/Compilation.h"
  12 #include "clang/Driver/InputInfo.h"
  13 #include "clang/Driver/Options.h"
  14 #include "llvm/Option/ArgList.h"
  15 #include "llvm/Support/FileSystem.h"
  16 #include "llvm/Support/Path.h"
  17 #include "llvm/Support/raw_ostream.h"
  18
  19 using namespace clang::driver;
  20 using namespace clang::driver::toolchains;
  21 using namespace clang::driver::tools;
  22 using namespace clang;
  23 using namespace llvm::opt;
  24
  25 static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs,
  26                                   const Multilib &Multilib,
  27                                   StringRef InstallPath,
  28                                   ToolChain::path_list &Paths) {
  29   if (const auto &PathsCallback = Multilibs.filePathsCallback())
  30     for (const auto &Path : PathsCallback(Multilib))
  31       addPathIfExists(D, InstallPath + Path, Paths);
  32 }
  33
  34 /// CSKY Toolchain
  35 CSKYToolChain::CSKYToolChain(const Driver &D, const llvm::Triple &Triple,
  36                              const ArgList &Args)
  37     : Generic_ELF(D, Triple, Args) {
  38   GCCInstallation.init(Triple, Args);
  39   if (GCCInstallation.isValid()) {
  40     Multilibs = GCCInstallation.getMultilibs();
  41     SelectedMultilib = GCCInstallation.getMultilib();
  42     path_list &Paths = getFilePaths();
  43     // Add toolchain/multilib specific file paths.
  44     addMultilibsFilePaths(D, Multilibs, SelectedMultilib,
  45                           GCCInstallation.getInstallPath(), Paths);
  46     getFilePaths().push_back(GCCInstallation.getInstallPath().str() +
  47                              SelectedMultilib.osSuffix());
  48     ToolChain::path_list &PPaths = getProgramPaths();
  49     // Multilib cross-compiler GCC installations put ld in a triple-prefixed
  50     // directory off of the parent of the GCC installation.
  51     PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
  52                            GCCInstallation.getTriple().str() + "/bin")
  53                          .str());
  54     PPaths.push_back((GCCInstallation.getParentLibPath() + "/../bin").str());
  55   } else {
  56     getProgramPaths().push_back(D.Dir);
  57   }
  58   getFilePaths().push_back(computeSysRoot() + "/lib" +
  59                            SelectedMultilib.osSuffix());
  60 }
  61
  62 Tool *CSKYToolChain::buildLinker() const {
  63   return new tools::CSKY::Linker(*this);
  64 }
  65
  66 ToolChain::RuntimeLibType CSKYToolChain::GetDefaultRuntimeLibType() const {
  67   return GCCInstallation.isValid() ? ToolChain::RLT_Libgcc
  68                                    : ToolChain::RLT_CompilerRT;
  69 }
  70
  71 ToolChain::UnwindLibType
  72 CSKYToolChain::GetUnwindLibType(const llvm::opt::ArgList &Args) const {
  73   return ToolChain::UNW_None;
  74 }
  75
  76 void CSKYToolChain::addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
  77                                           llvm::opt::ArgStringList &CC1Args,
  78                                           Action::OffloadKind) const {
  79   CC1Args.push_back("-nostdsysteminc");
  80 }
  81
  82 void CSKYToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
  83                                               ArgStringList &CC1Args) const {
  84   if (DriverArgs.hasArg(options::OPT_nostdinc))
  85     return;
  86
  87   if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) {
  88     SmallString<128> Dir(computeSysRoot());
  89     llvm::sys::path::append(Dir, "include");
  90     addSystemInclude(DriverArgs, CC1Args, Dir.str());
  91     SmallString<128> Dir2(computeSysRoot());
  92     llvm::sys::path::append(Dir2, "sys-include");
  93     addSystemInclude(DriverArgs, CC1Args, Dir2.str());
  94   }
  95 }
  96
  97 void CSKYToolChain::addLibStdCxxIncludePaths(
  98     const llvm::opt::ArgList &DriverArgs,
  99     llvm::opt::ArgStringList &CC1Args) const {
 100   const GCCVersion &Version = GCCInstallation.getVersion();
 101   StringRef TripleStr = GCCInstallation.getTriple().str();
 102   const Multilib &Multilib = GCCInstallation.getMultilib();
 103   addLibStdCXXIncludePaths(computeSysRoot() + "/include/c++/" + Version.Text,
 104                            TripleStr, Multilib.includeSuffix(), DriverArgs,
 105                            CC1Args);
 106 }
 107
 108 std::string CSKYToolChain::computeSysRoot() const {
 109   if (!getDriver().SysRoot.empty())
 110     return getDriver().SysRoot;
 111
 112   SmallString<128> SysRootDir;
 113   if (GCCInstallation.isValid()) {
 114     StringRef LibDir = GCCInstallation.getParentLibPath();
 115     StringRef TripleStr = GCCInstallation.getTriple().str();
 116     llvm::sys::path::append(SysRootDir, LibDir, "..", TripleStr);
 117   } else {
 118     // Use the triple as provided to the driver. Unlike the parsed triple
 119     // this has not been normalized to always contain every field.
 120     llvm::sys::path::append(SysRootDir, getDriver().Dir, "..",
 121                             getDriver().getTargetTriple());
 122   }
 123
 124   if (!llvm::sys::fs::exists(SysRootDir))
 125     return std::string();
 126
 127   return std::string(SysRootDir.str());
 128 }
 129
 130 void CSKY::Linker::ConstructJob(Compilation &C, const JobAction &JA,
 131                                 const InputInfo &Output,
 132                                 const InputInfoList &Inputs,
 133                                 const ArgList &Args,
 134                                 const char *LinkingOutput) const {
 135   const ToolChain &ToolChain = getToolChain();
 136   const Driver &D = ToolChain.getDriver();
 137   ArgStringList CmdArgs;
 138
 139   if (!D.SysRoot.empty())
 140     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
 141
 142   CmdArgs.push_back("-m");
 143   CmdArgs.push_back("cskyelf");
 144
 145   std::string Linker = getToolChain().GetLinkerPath();
 146
 147   bool WantCRTs =
 148       !Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles);
 149
 150   const char *crtbegin, *crtend;
 151   auto RuntimeLib = ToolChain.GetRuntimeLibType(Args);
 152   if (RuntimeLib == ToolChain::RLT_Libgcc) {
 153     crtbegin = "crtbegin.o";
 154     crtend = "crtend.o";
 155   } else {
 156     assert(RuntimeLib == ToolChain::RLT_CompilerRT);
 157     crtbegin = ToolChain.getCompilerRTArgString(Args, "crtbegin",
 158                                                 ToolChain::FT_Object);
 159     crtend =
 160         ToolChain.getCompilerRTArgString(Args, "crtend", ToolChain::FT_Object);
 161   }
 162
 163   if (WantCRTs) {
 164     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
 165     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
 166     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
 167   }
 168
 169   Args.AddAllArgs(CmdArgs, options::OPT_L);
 170   ToolChain.AddFilePathLibArgs(Args, CmdArgs);
 171   Args.AddAllArgs(CmdArgs,
 172                   {options::OPT_T_Group, options::OPT_e, options::OPT_s,
 173                    options::OPT_t, options::OPT_Z_Flag, options::OPT_r});
 174
 175   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
 176
 177   // TODO: add C++ includes and libs if compiling C++.
 178
 179   if (!Args.hasArg(options::OPT_nostdlib) &&
 180       !Args.hasArg(options::OPT_nodefaultlibs)) {
 181     if (ToolChain.ShouldLinkCXXStdlib(Args))
 182       ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
 183     CmdArgs.push_back("--start-group");
 184     CmdArgs.push_back("-lc");
 185     if (Args.hasArg(options::OPT_msim))
 186       CmdArgs.push_back("-lsemi");
 187     else
 188       CmdArgs.push_back("-lnosys");
 189     CmdArgs.push_back("--end-group");
 190     AddRunTimeLibs(ToolChain, ToolChain.getDriver(), CmdArgs, Args);
 191   }
 192
 193   if (WantCRTs) {
 194     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
 195     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
 196   }
 197
 198   CmdArgs.push_back("-o");
 199   CmdArgs.push_back(Output.getFilename());
 200   C.addCommand(std::make_unique<Command>(
 201       JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Linker),
 202       CmdArgs, Inputs, Output));
 203 }
 204 // CSKY tools end.