| //===--- 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" |
| #include "llvm/Support/VirtualFileSystem.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 auto &ToolChain = static_cast<const OpenBSD &>(getToolChain()); |
| const Driver &D = ToolChain.getDriver(); |
| const llvm::Triple &Triple = ToolChain.getTriple(); |
| ArgStringList CmdArgs; |
| |
| claimNoWarnArgs(Args); |
| |
| 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: { |
| 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 auto &ToolChain = static_cast<const OpenBSD &>(getToolChain()); |
| const Driver &D = ToolChain.getDriver(); |
| const llvm::Triple &Triple = ToolChain.getTriple(); |
| const llvm::Triple::ArchType Arch = ToolChain.getArch(); |
| const bool Static = Args.hasArg(options::OPT_static); |
| const bool Shared = Args.hasArg(options::OPT_shared); |
| const bool Profiling = Args.hasArg(options::OPT_pg); |
| const bool Pie = Args.hasArg(options::OPT_pie); |
| const bool Nopie = Args.hasArg(options::OPT_no_pie, options::OPT_nopie); |
| const bool Relocatable = Args.hasArg(options::OPT_r); |
| 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 (Arch == llvm::Triple::mips64) |
| CmdArgs.push_back("-EB"); |
| else if (Arch == llvm::Triple::mips64el) |
| CmdArgs.push_back("-EL"); |
| |
| if (!Args.hasArg(options::OPT_nostdlib) && !Shared && !Relocatable) { |
| CmdArgs.push_back("-e"); |
| CmdArgs.push_back("__start"); |
| } |
| |
| CmdArgs.push_back("--eh-frame-hdr"); |
| if (Static) { |
| CmdArgs.push_back("-Bstatic"); |
| } else { |
| if (Args.hasArg(options::OPT_rdynamic)) |
| CmdArgs.push_back("-export-dynamic"); |
| if (Shared) { |
| CmdArgs.push_back("-shared"); |
| } else if (!Relocatable) { |
| CmdArgs.push_back("-dynamic-linker"); |
| CmdArgs.push_back("/usr/libexec/ld.so"); |
| } |
| } |
| |
| if (Pie) |
| CmdArgs.push_back("-pie"); |
| if (Nopie || Profiling) |
| CmdArgs.push_back("-nopie"); |
| |
| if (Triple.isRISCV64()) { |
| CmdArgs.push_back("-X"); |
| if (Args.hasArg(options::OPT_mno_relax)) |
| CmdArgs.push_back("--no-relax"); |
| } |
| |
| assert((Output.isFilename() || Output.isNothing()) && "Invalid output."); |
| if (Output.isFilename()) { |
| CmdArgs.push_back("-o"); |
| CmdArgs.push_back(Output.getFilename()); |
| } |
| |
| if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles, |
| options::OPT_r)) { |
| const char *crt0 = nullptr; |
| const char *crtbegin = nullptr; |
| if (!Shared) { |
| if (Profiling) |
| crt0 = "gcrt0.o"; |
| else if (Static && !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_s, options::OPT_t}); |
| |
| if (D.isUsingLTO()) { |
| assert(!Inputs.empty() && "Must have at least one input."); |
| // Find the first filename InputInfo object. |
| auto Input = llvm::find_if( |
| Inputs, [](const InputInfo &II) -> bool { return II.isFilename(); }); |
| if (Input == Inputs.end()) |
| // For a very rare case, all of the inputs to the linker are |
| // InputArg. If that happens, just use the first InputInfo. |
| Input = Inputs.begin(); |
| |
| addLTOOptions(ToolChain, Args, CmdArgs, Output, *Input, |
| D.getLTOMode() == LTOK_Thin); |
| } |
| |
| 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, |
| options::OPT_r)) { |
| // Use the static OpenMP runtime with -static-openmp |
| bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) && !Static; |
| addOpenMPRuntime(C, CmdArgs, ToolChain, Args, StaticOpenMP); |
| |
| if (D.CCCIsCXX()) { |
| if (ToolChain.ShouldLinkCXXStdlib(Args)) |
| ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs); |
| if (Profiling) |
| CmdArgs.push_back("-lm_p"); |
| else |
| CmdArgs.push_back("-lm"); |
| } |
| |
| // Silence warnings when linking C code with a C++ '-stdlib' argument. |
| Args.ClaimAllArgs(options::OPT_stdlib_EQ); |
| |
| // Additional linker set-up and flags for Fortran. This is required in order |
| // to generate executables. As Fortran runtime depends on the C runtime, |
| // these dependencies need to be listed before the C runtime below (i.e. |
| // AddRunTimeLibs). |
| if (D.IsFlangMode()) { |
| addFortranRuntimeLibraryPath(ToolChain, Args, CmdArgs); |
| addFortranRuntimeLibs(ToolChain, Args, CmdArgs); |
| if (Profiling) |
| CmdArgs.push_back("-lm_p"); |
| else |
| CmdArgs.push_back("-lm"); |
| } |
| |
| if (NeedsSanitizerDeps) { |
| CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins")); |
| linkSanitizerRuntimeDeps(ToolChain, Args, CmdArgs); |
| } |
| if (NeedsXRayDeps) { |
| CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins")); |
| linkXRayRuntimeDeps(ToolChain, Args, 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 (!Shared && Profiling) |
| CmdArgs.push_back("-lpthread_p"); |
| else |
| CmdArgs.push_back("-lpthread"); |
| } |
| |
| if (!Shared) { |
| if (Profiling) |
| CmdArgs.push_back("-lc_p"); |
| else |
| CmdArgs.push_back("-lc"); |
| } |
| |
| CmdArgs.push_back("-lcompiler_rt"); |
| } |
| |
| if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles, |
| options::OPT_r)) { |
| const char *crtend = nullptr; |
| if (!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; |
| SanitizerMask Res = ToolChain::getSupportedSanitizers(); |
| if (IsX86 || IsX86_64) { |
| Res |= SanitizerKind::Vptr; |
| Res |= SanitizerKind::Fuzzer; |
| Res |= SanitizerKind::FuzzerNoLink; |
| } |
| if (IsX86_64) { |
| Res |= SanitizerKind::KernelAddress; |
| } |
| 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(concat(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, |
| concat(D.SysRoot, "/usr/include")); |
| } |
| |
| void OpenBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, |
| llvm::opt::ArgStringList &CC1Args) const { |
| addSystemInclude(DriverArgs, CC1Args, |
| concat(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++"); |
| if (Args.hasArg(options::OPT_fexperimental_library)) |
| CmdArgs.push_back("-lc++experimental"); |
| 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 { |
| if (Component == "builtins") { |
| SmallString<128> Path(getDriver().SysRoot); |
| llvm::sys::path::append(Path, "/usr/lib/libcompiler_rt.a"); |
| return std::string(Path); |
| } |
| SmallString<128> P(getDriver().ResourceDir); |
| std::string CRTBasename = |
| buildCompilerRTBasename(Args, Component, Type, /*AddArch=*/false); |
| llvm::sys::path::append(P, "lib", CRTBasename); |
| // Checks if this is the base system case which uses a different location. |
| if (getVFS().exists(P)) |
| return std::string(P); |
| return ToolChain::getCompilerRT(Args, Component, Type); |
| } |
| |
| 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; } |
| |
| ToolChain::UnwindTableLevel |
| OpenBSD::getDefaultUnwindTableLevel(const ArgList &Args) const { |
| switch (getArch()) { |
| case llvm::Triple::arm: |
| return UnwindTableLevel::None; |
| default: |
| return UnwindTableLevel::Asynchronous; |
| } |
| } |