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https://github.com/Gericom/teak-llvm.git
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f4be25352a
Summary: This patch adds a driver for the baremetal RISC-V target (i.e. riscv32-unknown-elf). For reference, D39963 added basic target info and added support for riscv32-linux-unknown-elf. Patch by: asb (Alex Bradbury) Reviewers: efriedma, phosek, apazos, espindola, mgrang Reviewed By: mgrang Subscribers: jrtc27, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, emaste, mgorny, arichardson, rbar, johnrusso, simoncook, jordy.potman.lists, sabuasal, niosHD, kito-cheng, shiva0217, zzheng, edward-jones, mgrang, cfe-commits Differential Revision: https://reviews.llvm.org/D46822 llvm-svn: 338385
118 lines
4.1 KiB
C++
118 lines
4.1 KiB
C++
//===--- RISCV.cpp - RISCV ToolChain Implementations ------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "RISCV.h"
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#include "CommonArgs.h"
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#include "InputInfo.h"
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#include "clang/Driver/Compilation.h"
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#include "clang/Driver/Options.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Support/Path.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace clang::driver;
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using namespace clang::driver::toolchains;
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using namespace clang::driver::tools;
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using namespace clang;
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using namespace llvm::opt;
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/// RISCV Toolchain
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RISCVToolChain::RISCVToolChain(const Driver &D, const llvm::Triple &Triple,
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const ArgList &Args)
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: Generic_ELF(D, Triple, Args) {
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GCCInstallation.init(Triple, Args);
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getFilePaths().push_back(D.SysRoot + "/lib");
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if (GCCInstallation.isValid()) {
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getFilePaths().push_back(GCCInstallation.getInstallPath().str());
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getProgramPaths().push_back(
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(GCCInstallation.getParentLibPath() + "/../bin").str());
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}
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}
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Tool *RISCVToolChain::buildLinker() const {
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return new tools::RISCV::Linker(*this);
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}
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void RISCVToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
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ArgStringList &CC1Args) const {
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if (DriverArgs.hasArg(options::OPT_nostdinc))
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return;
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if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) {
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SmallString<128> Dir(getDriver().SysRoot);
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llvm::sys::path::append(Dir, "include");
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addSystemInclude(DriverArgs, CC1Args, Dir.str());
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}
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}
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void RISCVToolChain::addLibStdCxxIncludePaths(
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const llvm::opt::ArgList &DriverArgs,
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llvm::opt::ArgStringList &CC1Args) const {
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StringRef LibDir = GCCInstallation.getParentLibPath();
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const GCCVersion &Version = GCCInstallation.getVersion();
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StringRef TripleStr = GCCInstallation.getTriple().str();
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const Multilib &Multilib = GCCInstallation.getMultilib();
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addLibStdCXXIncludePaths(
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LibDir.str() + "/../" + TripleStr.str() + "/include/c++/" + Version.Text,
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"", TripleStr, "", "", Multilib.includeSuffix(), DriverArgs, CC1Args);
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}
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void RISCV::Linker::ConstructJob(Compilation &C, const JobAction &JA,
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const InputInfo &Output,
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const InputInfoList &Inputs,
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const ArgList &Args,
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const char *LinkingOutput) const {
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const ToolChain &ToolChain = getToolChain();
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const Driver &D = ToolChain.getDriver();
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ArgStringList CmdArgs;
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if (!D.SysRoot.empty())
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CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
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std::string Linker = getToolChain().GetProgramPath(getShortName());
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bool WantCRTs =
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!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles);
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if (WantCRTs) {
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CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
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CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
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}
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Args.AddAllArgs(CmdArgs, options::OPT_L);
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ToolChain.AddFilePathLibArgs(Args, CmdArgs);
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Args.AddAllArgs(CmdArgs,
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{options::OPT_T_Group, options::OPT_e, options::OPT_s,
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options::OPT_t, options::OPT_Z_Flag, options::OPT_r});
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AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
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// TODO: add C++ includes and libs if compiling C++.
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if (!Args.hasArg(options::OPT_nostdlib) &&
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!Args.hasArg(options::OPT_nodefaultlibs)) {
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if (ToolChain.ShouldLinkCXXStdlib(Args))
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ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
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CmdArgs.push_back("--start-group");
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CmdArgs.push_back("-lc");
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CmdArgs.push_back("-lgloss");
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CmdArgs.push_back("--end-group");
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CmdArgs.push_back("-lgcc");
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}
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if (WantCRTs)
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CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
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CmdArgs.push_back("-o");
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CmdArgs.push_back(Output.getFilename());
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C.addCommand(llvm::make_unique<Command>(JA, *this, Args.MakeArgString(Linker),
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CmdArgs, Inputs));
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}
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// RISCV tools end.
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