diff options
Diffstat (limited to 'clang/lib/Driver/ToolChains/OpenBSD.cpp')
| -rw-r--r-- | clang/lib/Driver/ToolChains/OpenBSD.cpp | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/clang/lib/Driver/ToolChains/OpenBSD.cpp b/clang/lib/Driver/ToolChains/OpenBSD.cpp new file mode 100644 index 000000000000..e93f5fcc3d81 --- /dev/null +++ b/clang/lib/Driver/ToolChains/OpenBSD.cpp @@ -0,0 +1,269 @@ +//===--- 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/Mips.h" +#include "Arch/Sparc.h" +#include "CommonArgs.h" +#include "clang/Driver/Compilation.h" +#include "clang/Driver/Options.h" +#include "clang/Driver/SanitizerArgs.h" +#include "llvm/Option/ArgList.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 { + claimNoWarnArgs(Args); + ArgStringList CmdArgs; + + switch (getToolChain().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::ppc: + CmdArgs.push_back("-mppc"); + CmdArgs.push_back("-many"); + break; + + case llvm::Triple::sparc: + case llvm::Triple::sparcel: { + CmdArgs.push_back("-32"); + std::string CPU = getCPUName(Args, getToolChain().getTriple()); + CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple())); + AddAssemblerKPIC(getToolChain(), Args, CmdArgs); + break; + } + + case llvm::Triple::sparcv9: { + CmdArgs.push_back("-64"); + std::string CPU = getCPUName(Args, getToolChain().getTriple()); + CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple())); + AddAssemblerKPIC(getToolChain(), Args, CmdArgs); + break; + } + + case llvm::Triple::mips64: + case llvm::Triple::mips64el: { + StringRef CPUName; + StringRef ABIName; + mips::getMipsCPUAndABI(Args, getToolChain().getTriple(), CPUName, ABIName); + + CmdArgs.push_back("-mabi"); + CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data()); + + if (getToolChain().getTriple().isLittleEndian()) + CmdArgs.push_back("-EL"); + else + CmdArgs.push_back("-EB"); + + AddAssemblerKPIC(getToolChain(), 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(getToolChain().GetProgramPath("as")); + C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs)); +} + +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 = getToolChain().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)) { + 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))); + } + + const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath()); + C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs)); +} + +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::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"); +} + +Tool *OpenBSD::buildAssembler() const { + return new tools::openbsd::Assembler(*this); +} + +Tool *OpenBSD::buildLinker() const { return new tools::openbsd::Linker(*this); } |