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