| //===--- OpenBSD.cpp - OpenBSD 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 "OpenBSD.h" |
| #include "Arch/ARM.h" |
| #include "Arch/Mips.h" |
| #include "Arch/Sparc.h" |
| #include "CommonArgs.h" |
| #include "clang/Config/config.h" |
| #include "clang/Driver/Compilation.h" |
| #include "clang/Driver/Options.h" |
| #include "clang/Driver/SanitizerArgs.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; |
| |
| void openbsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA, |
| const InputInfo &Output, |
| const InputInfoList &Inputs, |
| const ArgList &Args, |
| const char *LinkingOutput) const { |
| const toolchains::OpenBSD &ToolChain = |
| static_cast<const toolchains::OpenBSD &>(getToolChain()); |
| const Driver &D = ToolChain.getDriver(); |
| const llvm::Triple &Triple = ToolChain.getTriple(); |
| |
| claimNoWarnArgs(Args); |
| ArgStringList CmdArgs; |
| |
| switch (ToolChain.getArch()) { |
| case llvm::Triple::x86: |
| // When building 32-bit code on OpenBSD/amd64, we have to explicitly |
| // instruct as in the base system to assemble 32-bit code. |
| CmdArgs.push_back("--32"); |
| break; |
| |
| case llvm::Triple::arm: |
| case llvm::Triple::armeb: { |
| StringRef MArch, MCPU; |
| arm::getARMArchCPUFromArgs(Args, MArch, MCPU, /*FromAs*/ true); |
| std::string Arch = arm::getARMTargetCPU(MCPU, MArch, Triple); |
| CmdArgs.push_back(Args.MakeArgString("-mcpu=" + Arch)); |
| break; |
| } |
| |
| case llvm::Triple::ppc: |
| CmdArgs.push_back("-mppc"); |
| CmdArgs.push_back("-many"); |
| break; |
| |
| case llvm::Triple::sparcv9: { |
| CmdArgs.push_back("-64"); |
| std::string CPU = getCPUName(D, Args, Triple); |
| CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, Triple)); |
| AddAssemblerKPIC(ToolChain, Args, CmdArgs); |
| break; |
| } |
| |
| case llvm::Triple::mips64: |
| case llvm::Triple::mips64el: { |
| StringRef CPUName; |
| StringRef ABIName; |
| mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName); |
| |
| CmdArgs.push_back("-march"); |
| CmdArgs.push_back(CPUName.data()); |
| |
| CmdArgs.push_back("-mabi"); |
| CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data()); |
| |
| if (Triple.isLittleEndian()) |
| CmdArgs.push_back("-EL"); |
| else |
| CmdArgs.push_back("-EB"); |
| |
| AddAssemblerKPIC(ToolChain, Args, CmdArgs); |
| break; |
| } |
| |
| default: |
| break; |
| } |
| |
| Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler); |
| |
| CmdArgs.push_back("-o"); |
| CmdArgs.push_back(Output.getFilename()); |
| |
| for (const auto &II : Inputs) |
| CmdArgs.push_back(II.getFilename()); |
| |
| const char *Exec = Args.MakeArgString(ToolChain.GetProgramPath("as")); |
| C.addCommand(std::make_unique<Command>(JA, *this, |
| ResponseFileSupport::AtFileCurCP(), |
| Exec, CmdArgs, Inputs, Output)); |
| } |
| |
| void openbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA, |
| const InputInfo &Output, |
| const InputInfoList &Inputs, |
| const ArgList &Args, |
| const char *LinkingOutput) const { |
| const toolchains::OpenBSD &ToolChain = |
| static_cast<const toolchains::OpenBSD &>(getToolChain()); |
| const Driver &D = ToolChain.getDriver(); |
| 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 (ToolChain.getArch() == llvm::Triple::mips64) |
| CmdArgs.push_back("-EB"); |
| else if (ToolChain.getArch() == llvm::Triple::mips64el) |
| CmdArgs.push_back("-EL"); |
| |
| if (!Args.hasArg(options::OPT_nostdlib, options::OPT_shared)) { |
| CmdArgs.push_back("-e"); |
| CmdArgs.push_back("__start"); |
| } |
| |
| CmdArgs.push_back("--eh-frame-hdr"); |
| if (Args.hasArg(options::OPT_static)) { |
| CmdArgs.push_back("-Bstatic"); |
| } else { |
| if (Args.hasArg(options::OPT_rdynamic)) |
| CmdArgs.push_back("-export-dynamic"); |
| CmdArgs.push_back("-Bdynamic"); |
| if (Args.hasArg(options::OPT_shared)) { |
| CmdArgs.push_back("-shared"); |
| } else { |
| CmdArgs.push_back("-dynamic-linker"); |
| CmdArgs.push_back("/usr/libexec/ld.so"); |
| } |
| } |
| |
| if (Args.hasArg(options::OPT_pie)) |
| CmdArgs.push_back("-pie"); |
| if (Args.hasArg(options::OPT_nopie) || Args.hasArg(options::OPT_pg)) |
| CmdArgs.push_back("-nopie"); |
| |
| if (Output.isFilename()) { |
| CmdArgs.push_back("-o"); |
| CmdArgs.push_back(Output.getFilename()); |
| } else { |
| assert(Output.isNothing() && "Invalid output."); |
| } |
| |
| if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) { |
| const char *crt0 = nullptr; |
| const char *crtbegin = nullptr; |
| if (!Args.hasArg(options::OPT_shared)) { |
| if (Args.hasArg(options::OPT_pg)) |
| crt0 = "gcrt0.o"; |
| else if (Args.hasArg(options::OPT_static) && |
| !Args.hasArg(options::OPT_nopie)) |
| crt0 = "rcrt0.o"; |
| else |
| crt0 = "crt0.o"; |
| crtbegin = "crtbegin.o"; |
| } else { |
| crtbegin = "crtbeginS.o"; |
| } |
| |
| if (crt0) |
| CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt0))); |
| CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin))); |
| } |
| |
| Args.AddAllArgs(CmdArgs, options::OPT_L); |
| ToolChain.AddFilePathLibArgs(Args, CmdArgs); |
| Args.AddAllArgs(CmdArgs, {options::OPT_T_Group, options::OPT_e, |
| options::OPT_s, options::OPT_t, |
| options::OPT_Z_Flag, options::OPT_r}); |
| |
| bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs); |
| bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs); |
| AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA); |
| |
| if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) { |
| // Use the static OpenMP runtime with -static-openmp |
| bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) && |
| !Args.hasArg(options::OPT_static); |
| addOpenMPRuntime(CmdArgs, ToolChain, Args, StaticOpenMP); |
| |
| if (D.CCCIsCXX()) { |
| if (ToolChain.ShouldLinkCXXStdlib(Args)) |
| ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs); |
| if (Args.hasArg(options::OPT_pg)) |
| CmdArgs.push_back("-lm_p"); |
| else |
| CmdArgs.push_back("-lm"); |
| } |
| if (NeedsSanitizerDeps) { |
| CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins")); |
| linkSanitizerRuntimeDeps(ToolChain, CmdArgs); |
| } |
| if (NeedsXRayDeps) { |
| CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins")); |
| linkXRayRuntimeDeps(ToolChain, CmdArgs); |
| } |
| // FIXME: For some reason GCC passes -lgcc before adding |
| // the default system libraries. Just mimic this for now. |
| CmdArgs.push_back("-lcompiler_rt"); |
| |
| if (Args.hasArg(options::OPT_pthread)) { |
| if (!Args.hasArg(options::OPT_shared) && Args.hasArg(options::OPT_pg)) |
| CmdArgs.push_back("-lpthread_p"); |
| else |
| CmdArgs.push_back("-lpthread"); |
| } |
| |
| if (!Args.hasArg(options::OPT_shared)) { |
| if (Args.hasArg(options::OPT_pg)) |
| CmdArgs.push_back("-lc_p"); |
| else |
| CmdArgs.push_back("-lc"); |
| } |
| |
| CmdArgs.push_back("-lcompiler_rt"); |
| } |
| |
| if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) { |
| const char *crtend = nullptr; |
| if (!Args.hasArg(options::OPT_shared)) |
| crtend = "crtend.o"; |
| else |
| crtend = "crtendS.o"; |
| |
| CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend))); |
| } |
| |
| ToolChain.addProfileRTLibs(Args, CmdArgs); |
| |
| const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath()); |
| C.addCommand(std::make_unique<Command>(JA, *this, |
| ResponseFileSupport::AtFileCurCP(), |
| Exec, CmdArgs, Inputs, Output)); |
| } |
| |
| SanitizerMask OpenBSD::getSupportedSanitizers() const { |
| const bool IsX86 = getTriple().getArch() == llvm::Triple::x86; |
| const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64; |
| |
| // For future use, only UBsan at the moment |
| SanitizerMask Res = ToolChain::getSupportedSanitizers(); |
| |
| if (IsX86 || IsX86_64) { |
| Res |= SanitizerKind::Vptr; |
| Res |= SanitizerKind::Fuzzer; |
| Res |= SanitizerKind::FuzzerNoLink; |
| } |
| |
| return Res; |
| } |
| |
| /// OpenBSD - OpenBSD tool chain which can call as(1) and ld(1) directly. |
| |
| OpenBSD::OpenBSD(const Driver &D, const llvm::Triple &Triple, |
| const ArgList &Args) |
| : Generic_ELF(D, Triple, Args) { |
| getFilePaths().push_back(getDriver().SysRoot + "/usr/lib"); |
| } |
| |
| void OpenBSD::AddClangSystemIncludeArgs( |
| const llvm::opt::ArgList &DriverArgs, |
| llvm::opt::ArgStringList &CC1Args) const { |
| const Driver &D = getDriver(); |
| |
| if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc)) |
| return; |
| |
| if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { |
| SmallString<128> Dir(D.ResourceDir); |
| llvm::sys::path::append(Dir, "include"); |
| addSystemInclude(DriverArgs, CC1Args, Dir.str()); |
| } |
| |
| if (DriverArgs.hasArg(options::OPT_nostdlibinc)) |
| return; |
| |
| // Check for configure-time C include directories. |
| StringRef CIncludeDirs(C_INCLUDE_DIRS); |
| if (CIncludeDirs != "") { |
| SmallVector<StringRef, 5> dirs; |
| CIncludeDirs.split(dirs, ":"); |
| for (StringRef dir : dirs) { |
| StringRef Prefix = |
| llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : ""; |
| addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir); |
| } |
| return; |
| } |
| |
| addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/include"); |
| } |
| |
| void OpenBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, |
| llvm::opt::ArgStringList &CC1Args) const { |
| addSystemInclude(DriverArgs, CC1Args, |
| getDriver().SysRoot + "/usr/include/c++/v1"); |
| } |
| |
| void OpenBSD::AddCXXStdlibLibArgs(const ArgList &Args, |
| ArgStringList &CmdArgs) const { |
| bool Profiling = Args.hasArg(options::OPT_pg); |
| |
| CmdArgs.push_back(Profiling ? "-lc++_p" : "-lc++"); |
| CmdArgs.push_back(Profiling ? "-lc++abi_p" : "-lc++abi"); |
| CmdArgs.push_back(Profiling ? "-lpthread_p" : "-lpthread"); |
| } |
| |
| std::string OpenBSD::getCompilerRT(const ArgList &Args, |
| StringRef Component, |
| FileType Type) const { |
| SmallString<128> Path(getDriver().SysRoot); |
| llvm::sys::path::append(Path, "/usr/lib/libcompiler_rt.a"); |
| return std::string(Path.str()); |
| } |
| |
| Tool *OpenBSD::buildAssembler() const { |
| return new tools::openbsd::Assembler(*this); |
| } |
| |
| Tool *OpenBSD::buildLinker() const { return new tools::openbsd::Linker(*this); } |
| |
| bool OpenBSD::HasNativeLLVMSupport() const { return true; } |