clang/lib/Driver/ToolChains/NetBSD.cpp

   1 //===--- NetBSD.cpp - NetBSD ToolChain Implementations ----------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "NetBSD.h"
  10 #include "Arch/ARM.h"
  11 #include "Arch/Mips.h"
  12 #include "Arch/Sparc.h"
  13 #include "CommonArgs.h"
  14 #include "clang/Driver/Compilation.h"
  15 #include "clang/Driver/Driver.h"
  16 #include "clang/Driver/Options.h"
  17 #include "clang/Driver/SanitizerArgs.h"
  18 #include "llvm/Option/ArgList.h"
  19 #include "llvm/Support/VirtualFileSystem.h"
  20
  21 using namespace clang::driver;
  22 using namespace clang::driver::tools;
  23 using namespace clang::driver::toolchains;
  24 using namespace clang;
  25 using namespace llvm::opt;
  26
  27 void netbsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
  28                                      const InputInfo &Output,
  29                                      const InputInfoList &Inputs,
  30                                      const ArgList &Args,
  31                                      const char *LinkingOutput) const {
  32   const toolchains::NetBSD &ToolChain =
  33     static_cast<const toolchains::NetBSD &>(getToolChain());
  34   const Driver &D = ToolChain.getDriver();
  35   const llvm::Triple &Triple = ToolChain.getTriple();
  36
  37   claimNoWarnArgs(Args);
  38   ArgStringList CmdArgs;
  39
  40   // GNU as needs different flags for creating the correct output format
  41   // on architectures with different ABIs or optional feature sets.
  42   switch (ToolChain.getArch()) {
  43   case llvm::Triple::x86:
  44     CmdArgs.push_back("--32");
  45     break;
  46   case llvm::Triple::arm:
  47   case llvm::Triple::armeb:
  48   case llvm::Triple::thumb:
  49   case llvm::Triple::thumbeb: {
  50     StringRef MArch, MCPU;
  51     arm::getARMArchCPUFromArgs(Args, MArch, MCPU, /*FromAs*/ true);
  52     std::string Arch = arm::getARMTargetCPU(MCPU, MArch, Triple);
  53     CmdArgs.push_back(Args.MakeArgString("-mcpu=" + Arch));
  54     break;
  55   }
  56
  57   case llvm::Triple::mips:
  58   case llvm::Triple::mipsel:
  59   case llvm::Triple::mips64:
  60   case llvm::Triple::mips64el: {
  61     StringRef CPUName;
  62     StringRef ABIName;
  63     mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
  64
  65     CmdArgs.push_back("-march");
  66     CmdArgs.push_back(CPUName.data());
  67
  68     CmdArgs.push_back("-mabi");
  69     CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data());
  70
  71     if (Triple.isLittleEndian())
  72       CmdArgs.push_back("-EL");
  73     else
  74       CmdArgs.push_back("-EB");
  75
  76     AddAssemblerKPIC(ToolChain, Args, CmdArgs);
  77     break;
  78   }
  79
  80   case llvm::Triple::sparc:
  81   case llvm::Triple::sparcel: {
  82     CmdArgs.push_back("-32");
  83     std::string CPU = getCPUName(D, Args, Triple);
  84     CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, Triple));
  85     AddAssemblerKPIC(ToolChain, Args, CmdArgs);
  86     break;
  87   }
  88
  89   case llvm::Triple::sparcv9: {
  90     CmdArgs.push_back("-64");
  91     std::string CPU = getCPUName(D, Args, Triple);
  92     CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, Triple));
  93     AddAssemblerKPIC(ToolChain, Args, CmdArgs);
  94     break;
  95   }
  96
  97   default:
  98     break;
  99   }
 100
 101   Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
 102
 103   CmdArgs.push_back("-o");
 104   CmdArgs.push_back(Output.getFilename());
 105
 106   for (const auto &II : Inputs)
 107     CmdArgs.push_back(II.getFilename());
 108
 109   const char *Exec = Args.MakeArgString((ToolChain.GetProgramPath("as")));
 110   C.addCommand(std::make_unique<Command>(JA, *this,
 111                                          ResponseFileSupport::AtFileCurCP(),
 112                                          Exec, CmdArgs, Inputs, Output));
 113 }
 114
 115 void netbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
 116                                   const InputInfo &Output,
 117                                   const InputInfoList &Inputs,
 118                                   const ArgList &Args,
 119                                   const char *LinkingOutput) const {
 120   const toolchains::NetBSD &ToolChain =
 121     static_cast<const toolchains::NetBSD &>(getToolChain());
 122   const Driver &D = ToolChain.getDriver();
 123   const llvm::Triple &Triple = ToolChain.getTriple();
 124
 125   ArgStringList CmdArgs;
 126
 127   if (!D.SysRoot.empty())
 128     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
 129
 130   CmdArgs.push_back("--eh-frame-hdr");
 131   if (Args.hasArg(options::OPT_static)) {
 132     CmdArgs.push_back("-Bstatic");
 133     if (Args.hasArg(options::OPT_pie)) {
 134       Args.AddAllArgs(CmdArgs, options::OPT_pie);
 135       CmdArgs.push_back("--no-dynamic-linker");
 136     }
 137   } else {
 138     if (Args.hasArg(options::OPT_rdynamic))
 139       CmdArgs.push_back("-export-dynamic");
 140     if (Args.hasArg(options::OPT_shared)) {
 141       CmdArgs.push_back("-Bshareable");
 142     } else if (!Args.hasArg(options::OPT_r)) {
 143       Args.AddAllArgs(CmdArgs, options::OPT_pie);
 144       CmdArgs.push_back("-dynamic-linker");
 145       CmdArgs.push_back("/libexec/ld.elf_so");
 146     }
 147   }
 148
 149   // Many NetBSD architectures support more than one ABI.
 150   // Determine the correct emulation for ld.
 151   switch (ToolChain.getArch()) {
 152   case llvm::Triple::x86:
 153     CmdArgs.push_back("-m");
 154     CmdArgs.push_back("elf_i386");
 155     break;
 156   case llvm::Triple::arm:
 157   case llvm::Triple::thumb:
 158     CmdArgs.push_back("-m");
 159     switch (Triple.getEnvironment()) {
 160     case llvm::Triple::EABI:
 161     case llvm::Triple::GNUEABI:
 162       CmdArgs.push_back("armelf_nbsd_eabi");
 163       break;
 164     case llvm::Triple::EABIHF:
 165     case llvm::Triple::GNUEABIHF:
 166       CmdArgs.push_back("armelf_nbsd_eabihf");
 167       break;
 168     default:
 169       CmdArgs.push_back("armelf_nbsd");
 170       break;
 171     }
 172     break;
 173   case llvm::Triple::armeb:
 174   case llvm::Triple::thumbeb:
 175     arm::appendBE8LinkFlag(Args, CmdArgs, ToolChain.getEffectiveTriple());
 176     CmdArgs.push_back("-m");
 177     switch (Triple.getEnvironment()) {
 178     case llvm::Triple::EABI:
 179     case llvm::Triple::GNUEABI:
 180       CmdArgs.push_back("armelfb_nbsd_eabi");
 181       break;
 182     case llvm::Triple::EABIHF:
 183     case llvm::Triple::GNUEABIHF:
 184       CmdArgs.push_back("armelfb_nbsd_eabihf");
 185       break;
 186     default:
 187       CmdArgs.push_back("armelfb_nbsd");
 188       break;
 189     }
 190     break;
 191   case llvm::Triple::mips64:
 192   case llvm::Triple::mips64el:
 193     if (mips::hasMipsAbiArg(Args, "32")) {
 194       CmdArgs.push_back("-m");
 195       if (ToolChain.getArch() == llvm::Triple::mips64)
 196         CmdArgs.push_back("elf32btsmip");
 197       else
 198         CmdArgs.push_back("elf32ltsmip");
 199     } else if (mips::hasMipsAbiArg(Args, "64")) {
 200       CmdArgs.push_back("-m");
 201       if (ToolChain.getArch() == llvm::Triple::mips64)
 202         CmdArgs.push_back("elf64btsmip");
 203       else
 204         CmdArgs.push_back("elf64ltsmip");
 205     }
 206     break;
 207   case llvm::Triple::ppc:
 208     CmdArgs.push_back("-m");
 209     CmdArgs.push_back("elf32ppc_nbsd");
 210     break;
 211
 212   case llvm::Triple::ppc64:
 213   case llvm::Triple::ppc64le:
 214     CmdArgs.push_back("-m");
 215     CmdArgs.push_back("elf64ppc");
 216     break;
 217
 218   case llvm::Triple::sparc:
 219     CmdArgs.push_back("-m");
 220     CmdArgs.push_back("elf32_sparc");
 221     break;
 222
 223   case llvm::Triple::sparcv9:
 224     CmdArgs.push_back("-m");
 225     CmdArgs.push_back("elf64_sparc");
 226     break;
 227
 228   default:
 229     break;
 230   }
 231
 232   if (Output.isFilename()) {
 233     CmdArgs.push_back("-o");
 234     CmdArgs.push_back(Output.getFilename());
 235   } else {
 236     assert(Output.isNothing() && "Invalid output.");
 237   }
 238
 239   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
 240                    options::OPT_r)) {
 241     if (!Args.hasArg(options::OPT_shared)) {
 242       CmdArgs.push_back(
 243           Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
 244     }
 245     CmdArgs.push_back(
 246         Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
 247     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie)) {
 248       CmdArgs.push_back(
 249           Args.MakeArgString(ToolChain.GetFilePath("crtbeginS.o")));
 250     } else {
 251       CmdArgs.push_back(
 252           Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
 253     }
 254   }
 255
 256   Args.AddAllArgs(CmdArgs, options::OPT_L);
 257   Args.AddAllArgs(CmdArgs, options::OPT_T_Group);
 258   Args.AddAllArgs(CmdArgs, options::OPT_e);
 259   Args.AddAllArgs(CmdArgs, options::OPT_s);
 260   Args.AddAllArgs(CmdArgs, options::OPT_t);
 261   Args.AddAllArgs(CmdArgs, options::OPT_Z_Flag);
 262   Args.AddAllArgs(CmdArgs, options::OPT_r);
 263
 264   bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
 265   bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
 266   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
 267
 268   const SanitizerArgs &SanArgs = ToolChain.getSanitizerArgs(Args);
 269   if (SanArgs.needsSharedRt()) {
 270     CmdArgs.push_back("-rpath");
 271     CmdArgs.push_back(Args.MakeArgString(ToolChain.getCompilerRTPath()));
 272   }
 273
 274   VersionTuple OsVersion = Triple.getOSVersion();
 275   bool useLibgcc = true;
 276   if (OsVersion >= VersionTuple(7) || OsVersion.getMajor() == 0) {
 277     switch (ToolChain.getArch()) {
 278     case llvm::Triple::aarch64:
 279     case llvm::Triple::aarch64_be:
 280     case llvm::Triple::arm:
 281     case llvm::Triple::armeb:
 282     case llvm::Triple::thumb:
 283     case llvm::Triple::thumbeb:
 284     case llvm::Triple::ppc:
 285     case llvm::Triple::ppc64:
 286     case llvm::Triple::ppc64le:
 287     case llvm::Triple::sparc:
 288     case llvm::Triple::sparcv9:
 289     case llvm::Triple::x86:
 290     case llvm::Triple::x86_64:
 291       useLibgcc = false;
 292       break;
 293     default:
 294       break;
 295     }
 296   }
 297
 298   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
 299                    options::OPT_r)) {
 300     // Use the static OpenMP runtime with -static-openmp
 301     bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) &&
 302                         !Args.hasArg(options::OPT_static);
 303     addOpenMPRuntime(CmdArgs, ToolChain, Args, StaticOpenMP);
 304
 305     if (D.CCCIsCXX()) {
 306       if (ToolChain.ShouldLinkCXXStdlib(Args))
 307         ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
 308       CmdArgs.push_back("-lm");
 309     }
 310     if (NeedsSanitizerDeps)
 311       linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
 312     if (NeedsXRayDeps)
 313       linkXRayRuntimeDeps(ToolChain, CmdArgs);
 314     if (Args.hasArg(options::OPT_pthread))
 315       CmdArgs.push_back("-lpthread");
 316     CmdArgs.push_back("-lc");
 317
 318     if (useLibgcc) {
 319       if (Args.hasArg(options::OPT_static)) {
 320         // libgcc_eh depends on libc, so resolve as much as possible,
 321         // pull in any new requirements from libc and then get the rest
 322         // of libgcc.
 323         CmdArgs.push_back("-lgcc_eh");
 324         CmdArgs.push_back("-lc");
 325         CmdArgs.push_back("-lgcc");
 326       } else {
 327         CmdArgs.push_back("-lgcc");
 328         CmdArgs.push_back("--as-needed");
 329         CmdArgs.push_back("-lgcc_s");
 330         CmdArgs.push_back("--no-as-needed");
 331       }
 332     }
 333   }
 334
 335   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
 336                    options::OPT_r)) {
 337     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie))
 338       CmdArgs.push_back(
 339           Args.MakeArgString(ToolChain.GetFilePath("crtendS.o")));
 340     else
 341       CmdArgs.push_back(
 342           Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
 343     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
 344   }
 345
 346   ToolChain.addProfileRTLibs(Args, CmdArgs);
 347
 348   const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
 349   C.addCommand(std::make_unique<Command>(JA, *this,
 350                                          ResponseFileSupport::AtFileCurCP(),
 351                                          Exec, CmdArgs, Inputs, Output));
 352 }
 353
 354 /// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
 355
 356 NetBSD::NetBSD(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
 357     : Generic_ELF(D, Triple, Args) {
 358   if (!Args.hasArg(options::OPT_nostdlib)) {
 359     // When targeting a 32-bit platform, try the special directory used on
 360     // 64-bit hosts, and only fall back to the main library directory if that
 361     // doesn't work.
 362     // FIXME: It'd be nicer to test if this directory exists, but I'm not sure
 363     // what all logic is needed to emulate the '=' prefix here.
 364     switch (Triple.getArch()) {
 365     case llvm::Triple::x86:
 366       getFilePaths().push_back("=/usr/lib/i386");
 367       break;
 368     case llvm::Triple::arm:
 369     case llvm::Triple::armeb:
 370     case llvm::Triple::thumb:
 371     case llvm::Triple::thumbeb:
 372       switch (Triple.getEnvironment()) {
 373       case llvm::Triple::EABI:
 374       case llvm::Triple::GNUEABI:
 375         getFilePaths().push_back("=/usr/lib/eabi");
 376         break;
 377       case llvm::Triple::EABIHF:
 378       case llvm::Triple::GNUEABIHF:
 379         getFilePaths().push_back("=/usr/lib/eabihf");
 380         break;
 381       default:
 382         getFilePaths().push_back("=/usr/lib/oabi");
 383         break;
 384       }
 385       break;
 386     case llvm::Triple::mips64:
 387     case llvm::Triple::mips64el:
 388       if (tools::mips::hasMipsAbiArg(Args, "o32"))
 389         getFilePaths().push_back("=/usr/lib/o32");
 390       else if (tools::mips::hasMipsAbiArg(Args, "64"))
 391         getFilePaths().push_back("=/usr/lib/64");
 392       break;
 393     case llvm::Triple::ppc:
 394       getFilePaths().push_back("=/usr/lib/powerpc");
 395       break;
 396     case llvm::Triple::sparc:
 397       getFilePaths().push_back("=/usr/lib/sparc");
 398       break;
 399     default:
 400       break;
 401     }
 402
 403     getFilePaths().push_back("=/usr/lib");
 404   }
 405 }
 406
 407 Tool *NetBSD::buildAssembler() const {
 408   return new tools::netbsd::Assembler(*this);
 409 }
 410
 411 Tool *NetBSD::buildLinker() const { return new tools::netbsd::Linker(*this); }
 412
 413 ToolChain::CXXStdlibType NetBSD::GetDefaultCXXStdlibType() const {
 414   VersionTuple OsVersion = getTriple().getOSVersion();
 415   if (OsVersion >= VersionTuple(7) || OsVersion.getMajor() == 0) {
 416     switch (getArch()) {
 417     case llvm::Triple::aarch64:
 418     case llvm::Triple::aarch64_be:
 419     case llvm::Triple::arm:
 420     case llvm::Triple::armeb:
 421     case llvm::Triple::thumb:
 422     case llvm::Triple::thumbeb:
 423     case llvm::Triple::ppc:
 424     case llvm::Triple::ppc64:
 425     case llvm::Triple::ppc64le:
 426     case llvm::Triple::sparc:
 427     case llvm::Triple::sparcv9:
 428     case llvm::Triple::x86:
 429     case llvm::Triple::x86_64:
 430       return ToolChain::CST_Libcxx;
 431     default:
 432       break;
 433     }
 434   }
 435   return ToolChain::CST_Libstdcxx;
 436 }
 437
 438 void NetBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
 439                                    llvm::opt::ArgStringList &CC1Args) const {
 440   const std::string Candidates[] = {
 441     // directory relative to build tree
 442     getDriver().Dir + "/../include/c++/v1",
 443     // system install with full upstream path
 444     getDriver().SysRoot + "/usr/include/c++/v1",
 445     // system install from src
 446     getDriver().SysRoot + "/usr/include/c++",
 447   };
 448
 449   for (const auto &IncludePath : Candidates) {
 450     if (!getVFS().exists(IncludePath + "/__config"))
 451       continue;
 452
 453     // Use the first candidate that looks valid.
 454     addSystemInclude(DriverArgs, CC1Args, IncludePath);
 455     return;
 456   }
 457 }
 458
 459 void NetBSD::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
 460                                       llvm::opt::ArgStringList &CC1Args) const {
 461   addLibStdCXXIncludePaths(getDriver().SysRoot + "/usr/include/g++", "", "",
 462                            DriverArgs, CC1Args);
 463 }
 464
 465 llvm::ExceptionHandling NetBSD::GetExceptionModel(const ArgList &Args) const {
 466   // NetBSD uses Dwarf exceptions on ARM.
 467   llvm::Triple::ArchType TArch = getTriple().getArch();
 468   if (TArch == llvm::Triple::arm || TArch == llvm::Triple::armeb ||
 469       TArch == llvm::Triple::thumb || TArch == llvm::Triple::thumbeb)
 470     return llvm::ExceptionHandling::DwarfCFI;
 471   return llvm::ExceptionHandling::None;
 472 }
 473
 474 SanitizerMask NetBSD::getSupportedSanitizers() const {
 475   const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
 476   const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
 477   SanitizerMask Res = ToolChain::getSupportedSanitizers();
 478   if (IsX86 || IsX86_64) {
 479     Res |= SanitizerKind::Address;
 480     Res |= SanitizerKind::PointerCompare;
 481     Res |= SanitizerKind::PointerSubtract;
 482     Res |= SanitizerKind::Function;
 483     Res |= SanitizerKind::Leak;
 484     Res |= SanitizerKind::SafeStack;
 485     Res |= SanitizerKind::Scudo;
 486     Res |= SanitizerKind::Vptr;
 487   }
 488   if (IsX86_64) {
 489     Res |= SanitizerKind::DataFlow;
 490     Res |= SanitizerKind::Fuzzer;
 491     Res |= SanitizerKind::FuzzerNoLink;
 492     Res |= SanitizerKind::HWAddress;
 493     Res |= SanitizerKind::KernelAddress;
 494     Res |= SanitizerKind::KernelHWAddress;
 495     Res |= SanitizerKind::KernelMemory;
 496     Res |= SanitizerKind::Memory;
 497     Res |= SanitizerKind::Thread;
 498   }
 499   return Res;
 500 }
 501
 502 void NetBSD::addClangTargetOptions(const ArgList &DriverArgs,
 503                                    ArgStringList &CC1Args,
 504                                    Action::OffloadKind) const {
 505   const SanitizerArgs &SanArgs = getSanitizerArgs(DriverArgs);
 506   if (SanArgs.hasAnySanitizer())
 507     CC1Args.push_back("-D_REENTRANT");
 508
 509   VersionTuple OsVersion = getTriple().getOSVersion();
 510   bool UseInitArrayDefault =
 511       OsVersion >= VersionTuple(9) || OsVersion.getMajor() == 0 ||
 512       getTriple().getArch() == llvm::Triple::aarch64 ||
 513       getTriple().getArch() == llvm::Triple::aarch64_be ||
 514       getTriple().getArch() == llvm::Triple::arm ||
 515       getTriple().getArch() == llvm::Triple::armeb;
 516
 517   if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
 518                           options::OPT_fno_use_init_array, UseInitArrayDefault))
 519     CC1Args.push_back("-fno-use-init-array");
 520 }