1 //===--- RISCVToolchain.cpp - RISCV 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 "RISCVToolchain.h" 10 #include "Arch/RISCV.h" 11 #include "CommonArgs.h" 12 #include "InputInfo.h" 13 #include "clang/Driver/Compilation.h" 14 #include "clang/Driver/Options.h" 15 #include "llvm/Option/ArgList.h" 16 #include "llvm/Support/FileSystem.h" 17 #include "llvm/Support/Path.h" 18 #include "llvm/Support/raw_ostream.h" 19 20 using namespace clang::driver; 21 using namespace clang::driver::toolchains; 22 using namespace clang::driver::tools; 23 using namespace clang; 24 using namespace llvm::opt; 25 26 /// RISCV Toolchain 27 RISCVToolChain::RISCVToolChain(const Driver &D, const llvm::Triple &Triple, 28 const ArgList &Args) 29 : Generic_ELF(D, Triple, Args) { 30 GCCInstallation.init(Triple, Args); 31 getFilePaths().push_back(computeSysRoot() + "/lib"); 32 if (GCCInstallation.isValid()) { 33 getFilePaths().push_back(GCCInstallation.getInstallPath().str()); 34 getProgramPaths().push_back( 35 (GCCInstallation.getParentLibPath() + "/../bin").str()); 36 } 37 } 38 39 Tool *RISCVToolChain::buildLinker() const { 40 return new tools::RISCV::Linker(*this); 41 } 42 43 void RISCVToolChain::addClangTargetOptions( 44 const llvm::opt::ArgList &DriverArgs, 45 llvm::opt::ArgStringList &CC1Args, 46 Action::OffloadKind) const { 47 CC1Args.push_back("-nostdsysteminc"); 48 CC1Args.push_back("-fuse-init-array"); 49 } 50 51 void RISCVToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs, 52 ArgStringList &CC1Args) const { 53 if (DriverArgs.hasArg(options::OPT_nostdinc)) 54 return; 55 56 if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) { 57 SmallString<128> Dir(computeSysRoot()); 58 llvm::sys::path::append(Dir, "include"); 59 addSystemInclude(DriverArgs, CC1Args, Dir.str()); 60 } 61 } 62 63 void RISCVToolChain::addLibStdCxxIncludePaths( 64 const llvm::opt::ArgList &DriverArgs, 65 llvm::opt::ArgStringList &CC1Args) const { 66 const GCCVersion &Version = GCCInstallation.getVersion(); 67 StringRef TripleStr = GCCInstallation.getTriple().str(); 68 const Multilib &Multilib = GCCInstallation.getMultilib(); 69 addLibStdCXXIncludePaths(computeSysRoot() + "/include/c++/" + Version.Text, 70 "", TripleStr, "", "", Multilib.includeSuffix(), DriverArgs, CC1Args); 71 } 72 73 std::string RISCVToolChain::computeSysRoot() const { 74 if (!getDriver().SysRoot.empty()) 75 return getDriver().SysRoot; 76 77 if (!GCCInstallation.isValid()) 78 return std::string(); 79 80 StringRef LibDir = GCCInstallation.getParentLibPath(); 81 StringRef TripleStr = GCCInstallation.getTriple().str(); 82 std::string SysRootDir = LibDir.str() + "/../" + TripleStr.str(); 83 84 if (!llvm::sys::fs::exists(SysRootDir)) 85 return std::string(); 86 87 return SysRootDir; 88 } 89 90 void RISCV::Linker::ConstructJob(Compilation &C, const JobAction &JA, 91 const InputInfo &Output, 92 const InputInfoList &Inputs, 93 const ArgList &Args, 94 const char *LinkingOutput) const { 95 const ToolChain &ToolChain = getToolChain(); 96 const Driver &D = ToolChain.getDriver(); 97 ArgStringList CmdArgs; 98 99 if (!D.SysRoot.empty()) 100 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot)); 101 102 std::string Linker = getToolChain().GetProgramPath(getShortName()); 103 104 if (D.isUsingLTO()) { 105 assert(!Inputs.empty() && "Must have at least one input."); 106 AddGoldPlugin(ToolChain, Args, CmdArgs, Output, Inputs[0], 107 D.getLTOMode() == LTOK_Thin); 108 } 109 110 bool WantCRTs = 111 !Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles); 112 113 if (WantCRTs) { 114 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o"))); 115 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o"))); 116 } 117 118 Args.AddAllArgs(CmdArgs, options::OPT_L); 119 ToolChain.AddFilePathLibArgs(Args, CmdArgs); 120 Args.AddAllArgs(CmdArgs, 121 {options::OPT_T_Group, options::OPT_e, options::OPT_s, 122 options::OPT_t, options::OPT_Z_Flag, options::OPT_r}); 123 124 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA); 125 126 // TODO: add C++ includes and libs if compiling C++. 127 128 if (!Args.hasArg(options::OPT_nostdlib) && 129 !Args.hasArg(options::OPT_nodefaultlibs)) { 130 if (ToolChain.ShouldLinkCXXStdlib(Args)) 131 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs); 132 CmdArgs.push_back("--start-group"); 133 CmdArgs.push_back("-lc"); 134 CmdArgs.push_back("-lgloss"); 135 CmdArgs.push_back("--end-group"); 136 CmdArgs.push_back("-lgcc"); 137 } 138 139 if (WantCRTs) 140 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o"))); 141 142 CmdArgs.push_back("-o"); 143 CmdArgs.push_back(Output.getFilename()); 144 C.addCommand(std::make_unique<Command>(JA, *this, Args.MakeArgString(Linker), 145 CmdArgs, Inputs)); 146 } 147 // RISCV tools end. 148