317 lines
10 KiB
C++
317 lines
10 KiB
C++
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//===--- OpenBSD.cpp - OpenBSD ToolChain Implementations --------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "OpenBSD.h"
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#include "Arch/Mips.h"
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#include "Arch/Sparc.h"
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#include "CommonArgs.h"
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#include "clang/Config/config.h"
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#include "clang/Driver/Compilation.h"
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#include "clang/Driver/Options.h"
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#include "clang/Driver/SanitizerArgs.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Support/Path.h"
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using namespace clang::driver;
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using namespace clang::driver::tools;
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using namespace clang::driver::toolchains;
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using namespace clang;
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using namespace llvm::opt;
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void openbsd::Assembler::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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claimNoWarnArgs(Args);
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ArgStringList CmdArgs;
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switch (getToolChain().getArch()) {
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case llvm::Triple::x86:
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// When building 32-bit code on OpenBSD/amd64, we have to explicitly
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// instruct as in the base system to assemble 32-bit code.
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CmdArgs.push_back("--32");
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break;
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case llvm::Triple::ppc:
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CmdArgs.push_back("-mppc");
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CmdArgs.push_back("-many");
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break;
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case llvm::Triple::sparcv9: {
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CmdArgs.push_back("-64");
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std::string CPU = getCPUName(Args, getToolChain().getTriple());
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CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
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AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
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break;
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}
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case llvm::Triple::mips64:
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case llvm::Triple::mips64el: {
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StringRef CPUName;
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StringRef ABIName;
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mips::getMipsCPUAndABI(Args, getToolChain().getTriple(), CPUName, ABIName);
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CmdArgs.push_back("-mabi");
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CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data());
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if (getToolChain().getTriple().isLittleEndian())
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CmdArgs.push_back("-EL");
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else
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CmdArgs.push_back("-EB");
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AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
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break;
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}
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default:
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break;
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}
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Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
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CmdArgs.push_back("-o");
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CmdArgs.push_back(Output.getFilename());
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for (const auto &II : Inputs)
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CmdArgs.push_back(II.getFilename());
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const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
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C.addCommand(std::make_unique<Command>(JA, *this,
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ResponseFileSupport::AtFileCurCP(),
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Exec, CmdArgs, Inputs, Output));
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}
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void openbsd::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 toolchains::OpenBSD &ToolChain =
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static_cast<const toolchains::OpenBSD &>(getToolChain());
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const Driver &D = getToolChain().getDriver();
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ArgStringList CmdArgs;
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// Silence warning for "clang -g foo.o -o foo"
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Args.ClaimAllArgs(options::OPT_g_Group);
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// and "clang -emit-llvm foo.o -o foo"
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Args.ClaimAllArgs(options::OPT_emit_llvm);
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// and for "clang -w foo.o -o foo". Other warning options are already
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// handled somewhere else.
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Args.ClaimAllArgs(options::OPT_w);
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if (ToolChain.getArch() == llvm::Triple::mips64)
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CmdArgs.push_back("-EB");
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else if (ToolChain.getArch() == llvm::Triple::mips64el)
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CmdArgs.push_back("-EL");
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if (!Args.hasArg(options::OPT_nostdlib, options::OPT_shared)) {
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CmdArgs.push_back("-e");
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CmdArgs.push_back("__start");
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}
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CmdArgs.push_back("--eh-frame-hdr");
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if (Args.hasArg(options::OPT_static)) {
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CmdArgs.push_back("-Bstatic");
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} else {
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if (Args.hasArg(options::OPT_rdynamic))
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CmdArgs.push_back("-export-dynamic");
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CmdArgs.push_back("-Bdynamic");
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if (Args.hasArg(options::OPT_shared)) {
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CmdArgs.push_back("-shared");
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} else {
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CmdArgs.push_back("-dynamic-linker");
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CmdArgs.push_back("/usr/libexec/ld.so");
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}
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}
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if (Args.hasArg(options::OPT_pie))
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CmdArgs.push_back("-pie");
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if (Args.hasArg(options::OPT_nopie) || Args.hasArg(options::OPT_pg))
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CmdArgs.push_back("-nopie");
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if (Output.isFilename()) {
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CmdArgs.push_back("-o");
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CmdArgs.push_back(Output.getFilename());
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} else {
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assert(Output.isNothing() && "Invalid output.");
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}
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if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
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const char *crt0 = nullptr;
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const char *crtbegin = nullptr;
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if (!Args.hasArg(options::OPT_shared)) {
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if (Args.hasArg(options::OPT_pg))
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crt0 = "gcrt0.o";
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else if (Args.hasArg(options::OPT_static) &&
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!Args.hasArg(options::OPT_nopie))
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crt0 = "rcrt0.o";
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else
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crt0 = "crt0.o";
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crtbegin = "crtbegin.o";
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} else {
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crtbegin = "crtbeginS.o";
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}
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if (crt0)
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CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt0)));
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CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
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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, {options::OPT_T_Group, options::OPT_e,
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options::OPT_s, options::OPT_t,
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options::OPT_Z_Flag, options::OPT_r});
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bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
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bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
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AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
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if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
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if (D.CCCIsCXX()) {
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if (ToolChain.ShouldLinkCXXStdlib(Args))
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ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
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if (Args.hasArg(options::OPT_pg))
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CmdArgs.push_back("-lm_p");
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else
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CmdArgs.push_back("-lm");
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}
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if (NeedsSanitizerDeps) {
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CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins"));
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linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
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}
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if (NeedsXRayDeps) {
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CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins"));
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linkXRayRuntimeDeps(ToolChain, CmdArgs);
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}
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// FIXME: For some reason GCC passes -lgcc before adding
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// the default system libraries. Just mimic this for now.
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CmdArgs.push_back("-lcompiler_rt");
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if (Args.hasArg(options::OPT_pthread)) {
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if (!Args.hasArg(options::OPT_shared) && Args.hasArg(options::OPT_pg))
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CmdArgs.push_back("-lpthread_p");
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else
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CmdArgs.push_back("-lpthread");
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}
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if (!Args.hasArg(options::OPT_shared)) {
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if (Args.hasArg(options::OPT_pg))
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CmdArgs.push_back("-lc_p");
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else
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CmdArgs.push_back("-lc");
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}
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CmdArgs.push_back("-lcompiler_rt");
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}
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if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
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const char *crtend = nullptr;
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if (!Args.hasArg(options::OPT_shared))
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crtend = "crtend.o";
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else
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crtend = "crtendS.o";
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CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
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}
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const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
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C.addCommand(std::make_unique<Command>(JA, *this,
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ResponseFileSupport::AtFileCurCP(),
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Exec, CmdArgs, Inputs, Output));
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}
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SanitizerMask OpenBSD::getSupportedSanitizers() const {
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const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
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const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
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// For future use, only UBsan at the moment
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SanitizerMask Res = ToolChain::getSupportedSanitizers();
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if (IsX86 || IsX86_64) {
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Res |= SanitizerKind::Vptr;
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Res |= SanitizerKind::Fuzzer;
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Res |= SanitizerKind::FuzzerNoLink;
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}
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return Res;
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}
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/// OpenBSD - OpenBSD tool chain which can call as(1) and ld(1) directly.
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OpenBSD::OpenBSD(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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getFilePaths().push_back(getDriver().SysRoot + "/usr/lib");
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}
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void OpenBSD::AddClangSystemIncludeArgs(
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const llvm::opt::ArgList &DriverArgs,
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llvm::opt::ArgStringList &CC1Args) const {
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const Driver &D = getDriver();
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if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
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return;
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if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
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SmallString<128> Dir(D.ResourceDir);
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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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if (DriverArgs.hasArg(options::OPT_nostdlibinc))
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return;
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// Check for configure-time C include directories.
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StringRef CIncludeDirs(C_INCLUDE_DIRS);
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if (CIncludeDirs != "") {
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SmallVector<StringRef, 5> dirs;
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CIncludeDirs.split(dirs, ":");
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for (StringRef dir : dirs) {
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StringRef Prefix =
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llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
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addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
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}
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return;
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}
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addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/include");
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}
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void OpenBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
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llvm::opt::ArgStringList &CC1Args) const {
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addSystemInclude(DriverArgs, CC1Args,
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getDriver().SysRoot + "/usr/include/c++/v1");
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}
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void OpenBSD::AddCXXStdlibLibArgs(const ArgList &Args,
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ArgStringList &CmdArgs) const {
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bool Profiling = Args.hasArg(options::OPT_pg);
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CmdArgs.push_back(Profiling ? "-lc++_p" : "-lc++");
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CmdArgs.push_back(Profiling ? "-lc++abi_p" : "-lc++abi");
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CmdArgs.push_back(Profiling ? "-lpthread_p" : "-lpthread");
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}
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std::string OpenBSD::getCompilerRT(const ArgList &Args,
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StringRef Component,
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FileType Type) const {
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SmallString<128> Path(getDriver().SysRoot);
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llvm::sys::path::append(Path, "/usr/lib/libcompiler_rt.a");
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return std::string(Path.str());
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}
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Tool *OpenBSD::buildAssembler() const {
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return new tools::openbsd::Assembler(*this);
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}
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Tool *OpenBSD::buildLinker() const { return new tools::openbsd::Linker(*this); }
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bool OpenBSD::HasNativeLLVMSupport() const { return true; }
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