| //===--- NaCl.cpp - Native Client ToolChain Implementations -----*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "NaCl.h" |
| #include "CommonArgs.h" |
| #include "clang/Driver/Compilation.h" |
| #include "clang/Driver/Driver.h" |
| #include "clang/Driver/DriverDiagnostic.h" |
| #include "clang/Driver/InputInfo.h" |
| #include "clang/Driver/Options.h" |
| #include "llvm/Option/ArgList.h" |
| #include "llvm/Support/Path.h" |
| |
| using namespace clang::driver; |
| using namespace clang::driver::tools; |
| using namespace clang::driver::toolchains; |
| using namespace clang; |
| using namespace llvm::opt; |
| |
| // NaCl ARM assembly (inline or standalone) can be written with a set of macros |
| // for the various SFI requirements like register masking. The assembly tool |
| // inserts the file containing the macros as an input into all the assembly |
| // jobs. |
| void nacltools::AssemblerARM::ConstructJob(Compilation &C, const JobAction &JA, |
| const InputInfo &Output, |
| const InputInfoList &Inputs, |
| const ArgList &Args, |
| const char *LinkingOutput) const { |
| const toolchains::NaClToolChain &ToolChain = |
| static_cast<const toolchains::NaClToolChain &>(getToolChain()); |
| InputInfo NaClMacros(types::TY_PP_Asm, ToolChain.GetNaClArmMacrosPath(), |
| "nacl-arm-macros.s"); |
| InputInfoList NewInputs; |
| NewInputs.push_back(NaClMacros); |
| NewInputs.append(Inputs.begin(), Inputs.end()); |
| gnutools::Assembler::ConstructJob(C, JA, Output, NewInputs, Args, |
| LinkingOutput); |
| } |
| |
| // This is quite similar to gnutools::Linker::ConstructJob with changes that |
| // we use static by default, do not yet support sanitizers or LTO, and a few |
| // others. Eventually we can support more of that and hopefully migrate back |
| // to gnutools::Linker. |
| void nacltools::Linker::ConstructJob(Compilation &C, const JobAction &JA, |
| const InputInfo &Output, |
| const InputInfoList &Inputs, |
| const ArgList &Args, |
| const char *LinkingOutput) const { |
| |
| const toolchains::NaClToolChain &ToolChain = |
| static_cast<const toolchains::NaClToolChain &>(getToolChain()); |
| const Driver &D = ToolChain.getDriver(); |
| const llvm::Triple::ArchType Arch = ToolChain.getArch(); |
| const bool IsStatic = |
| !Args.hasArg(options::OPT_dynamic) && !Args.hasArg(options::OPT_shared); |
| |
| ArgStringList CmdArgs; |
| |
| // Silence warning for "clang -g foo.o -o foo" |
| Args.ClaimAllArgs(options::OPT_g_Group); |
| // and "clang -emit-llvm foo.o -o foo" |
| Args.ClaimAllArgs(options::OPT_emit_llvm); |
| // and for "clang -w foo.o -o foo". Other warning options are already |
| // handled somewhere else. |
| Args.ClaimAllArgs(options::OPT_w); |
| |
| if (!D.SysRoot.empty()) |
| CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot)); |
| |
| if (Args.hasArg(options::OPT_rdynamic)) |
| CmdArgs.push_back("-export-dynamic"); |
| |
| if (Args.hasArg(options::OPT_s)) |
| CmdArgs.push_back("-s"); |
| |
| // NaClToolChain doesn't have ExtraOpts like Linux; the only relevant flag |
| // from there is --build-id, which we do want. |
| CmdArgs.push_back("--build-id"); |
| |
| if (!IsStatic) |
| CmdArgs.push_back("--eh-frame-hdr"); |
| |
| CmdArgs.push_back("-m"); |
| if (Arch == llvm::Triple::x86) |
| CmdArgs.push_back("elf_i386_nacl"); |
| else if (Arch == llvm::Triple::arm) |
| CmdArgs.push_back("armelf_nacl"); |
| else if (Arch == llvm::Triple::x86_64) |
| CmdArgs.push_back("elf_x86_64_nacl"); |
| else if (Arch == llvm::Triple::mipsel) |
| CmdArgs.push_back("mipselelf_nacl"); |
| else |
| D.Diag(diag::err_target_unsupported_arch) << ToolChain.getArchName() |
| << "Native Client"; |
| |
| if (IsStatic) |
| CmdArgs.push_back("-static"); |
| else if (Args.hasArg(options::OPT_shared)) |
| CmdArgs.push_back("-shared"); |
| |
| CmdArgs.push_back("-o"); |
| CmdArgs.push_back(Output.getFilename()); |
| if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) { |
| if (!Args.hasArg(options::OPT_shared)) |
| CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt1.o"))); |
| CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o"))); |
| |
| const char *crtbegin; |
| if (IsStatic) |
| crtbegin = "crtbeginT.o"; |
| else if (Args.hasArg(options::OPT_shared)) |
| crtbegin = "crtbeginS.o"; |
| else |
| crtbegin = "crtbegin.o"; |
| CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin))); |
| } |
| |
| Args.AddAllArgs(CmdArgs, options::OPT_L); |
| Args.AddAllArgs(CmdArgs, options::OPT_u); |
| |
| ToolChain.AddFilePathLibArgs(Args, CmdArgs); |
| |
| if (Args.hasArg(options::OPT_Z_Xlinker__no_demangle)) |
| CmdArgs.push_back("--no-demangle"); |
| |
| AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA); |
| |
| if (D.CCCIsCXX() && |
| !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) { |
| if (ToolChain.ShouldLinkCXXStdlib(Args)) { |
| bool OnlyLibstdcxxStatic = |
| Args.hasArg(options::OPT_static_libstdcxx) && !IsStatic; |
| if (OnlyLibstdcxxStatic) |
| CmdArgs.push_back("-Bstatic"); |
| ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs); |
| if (OnlyLibstdcxxStatic) |
| CmdArgs.push_back("-Bdynamic"); |
| } |
| CmdArgs.push_back("-lm"); |
| } |
| |
| if (!Args.hasArg(options::OPT_nostdlib)) { |
| if (!Args.hasArg(options::OPT_nodefaultlibs)) { |
| // Always use groups, since it has no effect on dynamic libraries. |
| CmdArgs.push_back("--start-group"); |
| CmdArgs.push_back("-lc"); |
| // NaCl's libc++ currently requires libpthread, so just always include it |
| // in the group for C++. |
| if (Args.hasArg(options::OPT_pthread) || |
| Args.hasArg(options::OPT_pthreads) || D.CCCIsCXX()) { |
| // Gold, used by Mips, handles nested groups differently than ld, and |
| // without '-lnacl' it prefers symbols from libpthread.a over libnacl.a, |
| // which is not a desired behaviour here. |
| // See https://sourceware.org/ml/binutils/2015-03/msg00034.html |
| if (getToolChain().getArch() == llvm::Triple::mipsel) |
| CmdArgs.push_back("-lnacl"); |
| |
| CmdArgs.push_back("-lpthread"); |
| } |
| |
| CmdArgs.push_back("-lgcc"); |
| CmdArgs.push_back("--as-needed"); |
| if (IsStatic) |
| CmdArgs.push_back("-lgcc_eh"); |
| else |
| CmdArgs.push_back("-lgcc_s"); |
| CmdArgs.push_back("--no-as-needed"); |
| |
| // Mips needs to create and use pnacl_legacy library that contains |
| // definitions from bitcode/pnaclmm.c and definitions for |
| // __nacl_tp_tls_offset() and __nacl_tp_tdb_offset(). |
| if (getToolChain().getArch() == llvm::Triple::mipsel) |
| CmdArgs.push_back("-lpnacl_legacy"); |
| |
| CmdArgs.push_back("--end-group"); |
| } |
| |
| if (!Args.hasArg(options::OPT_nostartfiles)) { |
| const char *crtend; |
| if (Args.hasArg(options::OPT_shared)) |
| crtend = "crtendS.o"; |
| else |
| crtend = "crtend.o"; |
| |
| CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend))); |
| CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o"))); |
| } |
| } |
| |
| const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath()); |
| C.addCommand(std::make_unique<Command>(JA, *this, |
| ResponseFileSupport::AtFileCurCP(), |
| Exec, CmdArgs, Inputs, Output)); |
| } |
| |
| /// NaCl Toolchain |
| NaClToolChain::NaClToolChain(const Driver &D, const llvm::Triple &Triple, |
| const ArgList &Args) |
| : Generic_ELF(D, Triple, Args) { |
| |
| // Remove paths added by Generic_GCC. NaCl Toolchain cannot use the |
| // default paths, and must instead only use the paths provided |
| // with this toolchain based on architecture. |
| path_list &file_paths = getFilePaths(); |
| path_list &prog_paths = getProgramPaths(); |
| |
| file_paths.clear(); |
| prog_paths.clear(); |
| |
| // Path for library files (libc.a, ...) |
| std::string FilePath(getDriver().Dir + "/../"); |
| |
| // Path for tools (clang, ld, etc..) |
| std::string ProgPath(getDriver().Dir + "/../"); |
| |
| // Path for toolchain libraries (libgcc.a, ...) |
| std::string ToolPath(getDriver().ResourceDir + "/lib/"); |
| |
| switch (Triple.getArch()) { |
| case llvm::Triple::x86: |
| file_paths.push_back(FilePath + "x86_64-nacl/lib32"); |
| file_paths.push_back(FilePath + "i686-nacl/usr/lib"); |
| prog_paths.push_back(ProgPath + "x86_64-nacl/bin"); |
| file_paths.push_back(ToolPath + "i686-nacl"); |
| break; |
| case llvm::Triple::x86_64: |
| file_paths.push_back(FilePath + "x86_64-nacl/lib"); |
| file_paths.push_back(FilePath + "x86_64-nacl/usr/lib"); |
| prog_paths.push_back(ProgPath + "x86_64-nacl/bin"); |
| file_paths.push_back(ToolPath + "x86_64-nacl"); |
| break; |
| case llvm::Triple::arm: |
| file_paths.push_back(FilePath + "arm-nacl/lib"); |
| file_paths.push_back(FilePath + "arm-nacl/usr/lib"); |
| prog_paths.push_back(ProgPath + "arm-nacl/bin"); |
| file_paths.push_back(ToolPath + "arm-nacl"); |
| break; |
| case llvm::Triple::mipsel: |
| file_paths.push_back(FilePath + "mipsel-nacl/lib"); |
| file_paths.push_back(FilePath + "mipsel-nacl/usr/lib"); |
| prog_paths.push_back(ProgPath + "bin"); |
| file_paths.push_back(ToolPath + "mipsel-nacl"); |
| break; |
| default: |
| break; |
| } |
| |
| NaClArmMacrosPath = GetFilePath("nacl-arm-macros.s"); |
| } |
| |
| void NaClToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs, |
| ArgStringList &CC1Args) const { |
| const Driver &D = getDriver(); |
| if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc)) |
| return; |
| |
| if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { |
| SmallString<128> P(D.ResourceDir); |
| llvm::sys::path::append(P, "include"); |
| addSystemInclude(DriverArgs, CC1Args, P.str()); |
| } |
| |
| if (DriverArgs.hasArg(options::OPT_nostdlibinc)) |
| return; |
| |
| SmallString<128> P(D.Dir + "/../"); |
| switch (getTriple().getArch()) { |
| case llvm::Triple::x86: |
| // x86 is special because multilib style uses x86_64-nacl/include for libc |
| // headers but the SDK wants i686-nacl/usr/include. The other architectures |
| // have the same substring. |
| llvm::sys::path::append(P, "i686-nacl/usr/include"); |
| addSystemInclude(DriverArgs, CC1Args, P.str()); |
| llvm::sys::path::remove_filename(P); |
| llvm::sys::path::remove_filename(P); |
| llvm::sys::path::remove_filename(P); |
| llvm::sys::path::append(P, "x86_64-nacl/include"); |
| addSystemInclude(DriverArgs, CC1Args, P.str()); |
| return; |
| case llvm::Triple::arm: |
| llvm::sys::path::append(P, "arm-nacl/usr/include"); |
| break; |
| case llvm::Triple::x86_64: |
| llvm::sys::path::append(P, "x86_64-nacl/usr/include"); |
| break; |
| case llvm::Triple::mipsel: |
| llvm::sys::path::append(P, "mipsel-nacl/usr/include"); |
| break; |
| default: |
| return; |
| } |
| |
| addSystemInclude(DriverArgs, CC1Args, P.str()); |
| llvm::sys::path::remove_filename(P); |
| llvm::sys::path::remove_filename(P); |
| llvm::sys::path::append(P, "include"); |
| addSystemInclude(DriverArgs, CC1Args, P.str()); |
| } |
| |
| void NaClToolChain::AddCXXStdlibLibArgs(const ArgList &Args, |
| ArgStringList &CmdArgs) const { |
| // Check for -stdlib= flags. We only support libc++ but this consumes the arg |
| // if the value is libc++, and emits an error for other values. |
| GetCXXStdlibType(Args); |
| CmdArgs.push_back("-lc++"); |
| } |
| |
| void NaClToolChain::addLibCxxIncludePaths( |
| const llvm::opt::ArgList &DriverArgs, |
| llvm::opt::ArgStringList &CC1Args) const { |
| const Driver &D = getDriver(); |
| |
| SmallString<128> P(D.Dir + "/../"); |
| switch (getTriple().getArch()) { |
| default: |
| break; |
| case llvm::Triple::arm: |
| llvm::sys::path::append(P, "arm-nacl/include/c++/v1"); |
| addSystemInclude(DriverArgs, CC1Args, P.str()); |
| break; |
| case llvm::Triple::x86: |
| llvm::sys::path::append(P, "x86_64-nacl/include/c++/v1"); |
| addSystemInclude(DriverArgs, CC1Args, P.str()); |
| break; |
| case llvm::Triple::x86_64: |
| llvm::sys::path::append(P, "x86_64-nacl/include/c++/v1"); |
| addSystemInclude(DriverArgs, CC1Args, P.str()); |
| break; |
| case llvm::Triple::mipsel: |
| llvm::sys::path::append(P, "mipsel-nacl/include/c++/v1"); |
| addSystemInclude(DriverArgs, CC1Args, P.str()); |
| break; |
| } |
| } |
| |
| ToolChain::CXXStdlibType |
| NaClToolChain::GetCXXStdlibType(const ArgList &Args) const { |
| if (Arg *A = Args.getLastArg(options::OPT_stdlib_EQ)) { |
| StringRef Value = A->getValue(); |
| if (Value == "libc++") |
| return ToolChain::CST_Libcxx; |
| getDriver().Diag(clang::diag::err_drv_invalid_stdlib_name) |
| << A->getAsString(Args); |
| } |
| |
| return ToolChain::CST_Libcxx; |
| } |
| |
| std::string |
| NaClToolChain::ComputeEffectiveClangTriple(const ArgList &Args, |
| types::ID InputType) const { |
| llvm::Triple TheTriple(ComputeLLVMTriple(Args, InputType)); |
| if (TheTriple.getArch() == llvm::Triple::arm && |
| TheTriple.getEnvironment() == llvm::Triple::UnknownEnvironment) |
| TheTriple.setEnvironment(llvm::Triple::GNUEABIHF); |
| return TheTriple.getTriple(); |
| } |
| |
| Tool *NaClToolChain::buildLinker() const { |
| return new tools::nacltools::Linker(*this); |
| } |
| |
| Tool *NaClToolChain::buildAssembler() const { |
| if (getTriple().getArch() == llvm::Triple::arm) |
| return new tools::nacltools::AssemblerARM(*this); |
| return new tools::gnutools::Assembler(*this); |
| } |