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 "clang/Config/config.h"
14 #include "clang/Driver/CommonArgs.h"
15 #include "clang/Driver/Compilation.h"
16 #include "clang/Driver/Driver.h"
17 #include "clang/Driver/Options.h"
18 #include "clang/Driver/SanitizerArgs.h"
19 #include "llvm/Option/ArgList.h"
20 #include "llvm/Support/VirtualFileSystem.h"
21
22 using namespace clang::driver;
23 using namespace clang::driver::tools;
24 using namespace clang::driver::toolchains;
25 using namespace clang;
26 using namespace llvm::opt;
27
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const28 void netbsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
29 const InputInfo &Output,
30 const InputInfoList &Inputs,
31 const ArgList &Args,
32 const char *LinkingOutput) const {
33 const auto &ToolChain = static_cast<const NetBSD &>(getToolChain());
34 const Driver &D = ToolChain.getDriver();
35 const llvm::Triple &Triple = ToolChain.getTriple();
36 ArgStringList CmdArgs;
37
38 claimNoWarnArgs(Args);
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 CmdArgs.push_back("-32");
82 std::string CPU = getCPUName(D, Args, Triple);
83 CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, Triple));
84 AddAssemblerKPIC(ToolChain, Args, CmdArgs);
85 break;
86 }
87
88 case llvm::Triple::sparcv9: {
89 CmdArgs.push_back("-64");
90 std::string CPU = getCPUName(D, Args, Triple);
91 CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, Triple));
92 AddAssemblerKPIC(ToolChain, Args, CmdArgs);
93 break;
94 }
95
96 default:
97 break;
98 }
99
100 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
101
102 CmdArgs.push_back("-o");
103 CmdArgs.push_back(Output.getFilename());
104
105 for (const auto &II : Inputs)
106 CmdArgs.push_back(II.getFilename());
107
108 const char *Exec = Args.MakeArgString((ToolChain.GetProgramPath("as")));
109 C.addCommand(std::make_unique<Command>(JA, *this,
110 ResponseFileSupport::AtFileCurCP(),
111 Exec, CmdArgs, Inputs, Output));
112 }
113
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const114 void netbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
115 const InputInfo &Output,
116 const InputInfoList &Inputs,
117 const ArgList &Args,
118 const char *LinkingOutput) const {
119 const auto &ToolChain = static_cast<const NetBSD &>(getToolChain());
120 const Driver &D = ToolChain.getDriver();
121 const llvm::Triple &Triple = ToolChain.getTriple();
122 const llvm::Triple::ArchType Arch = ToolChain.getArch();
123 const bool Static = Args.hasArg(options::OPT_static);
124 const bool Shared = Args.hasArg(options::OPT_shared);
125 const bool Pie = Args.hasArg(options::OPT_pie);
126 ArgStringList CmdArgs;
127
128 if (!D.SysRoot.empty())
129 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
130
131 CmdArgs.push_back("--eh-frame-hdr");
132 if (Static) {
133 CmdArgs.push_back("-Bstatic");
134 if (Pie) {
135 Args.AddAllArgs(CmdArgs, options::OPT_pie);
136 CmdArgs.push_back("--no-dynamic-linker");
137 }
138 } else {
139 if (Args.hasArg(options::OPT_rdynamic))
140 CmdArgs.push_back("-export-dynamic");
141 if (Shared) {
142 CmdArgs.push_back("-shared");
143 } else if (!Args.hasArg(options::OPT_r)) {
144 Args.AddAllArgs(CmdArgs, options::OPT_pie);
145 CmdArgs.push_back("-dynamic-linker");
146 CmdArgs.push_back("/libexec/ld.elf_so");
147 }
148 }
149
150 // Many NetBSD architectures support more than one ABI.
151 // Determine the correct emulation for ld.
152 switch (Arch) {
153 case llvm::Triple::x86:
154 CmdArgs.push_back("-m");
155 CmdArgs.push_back("elf_i386");
156 break;
157 case llvm::Triple::arm:
158 case llvm::Triple::thumb:
159 CmdArgs.push_back("-m");
160 switch (Triple.getEnvironment()) {
161 case llvm::Triple::EABI:
162 case llvm::Triple::GNUEABI:
163 CmdArgs.push_back("armelf_nbsd_eabi");
164 break;
165 case llvm::Triple::EABIHF:
166 case llvm::Triple::GNUEABIHF:
167 CmdArgs.push_back("armelf_nbsd_eabihf");
168 break;
169 default:
170 CmdArgs.push_back("armelf_nbsd");
171 break;
172 }
173 break;
174 case llvm::Triple::armeb:
175 case llvm::Triple::thumbeb:
176 arm::appendBE8LinkFlag(Args, CmdArgs, ToolChain.getEffectiveTriple());
177 CmdArgs.push_back("-m");
178 switch (Triple.getEnvironment()) {
179 case llvm::Triple::EABI:
180 case llvm::Triple::GNUEABI:
181 CmdArgs.push_back("armelfb_nbsd_eabi");
182 break;
183 case llvm::Triple::EABIHF:
184 case llvm::Triple::GNUEABIHF:
185 CmdArgs.push_back("armelfb_nbsd_eabihf");
186 break;
187 default:
188 CmdArgs.push_back("armelfb_nbsd");
189 break;
190 }
191 break;
192 case llvm::Triple::mips64:
193 case llvm::Triple::mips64el:
194 if (mips::hasMipsAbiArg(Args, "32")) {
195 CmdArgs.push_back("-m");
196 if (Arch == llvm::Triple::mips64)
197 CmdArgs.push_back("elf32btsmip");
198 else
199 CmdArgs.push_back("elf32ltsmip");
200 } else if (mips::hasMipsAbiArg(Args, "64")) {
201 CmdArgs.push_back("-m");
202 if (Arch == llvm::Triple::mips64)
203 CmdArgs.push_back("elf64btsmip");
204 else
205 CmdArgs.push_back("elf64ltsmip");
206 }
207 break;
208 case llvm::Triple::ppc:
209 CmdArgs.push_back("-m");
210 CmdArgs.push_back("elf32ppc_nbsd");
211 break;
212
213 case llvm::Triple::ppc64:
214 case llvm::Triple::ppc64le:
215 CmdArgs.push_back("-m");
216 CmdArgs.push_back("elf64ppc");
217 break;
218
219 case llvm::Triple::riscv32:
220 CmdArgs.push_back("-m");
221 CmdArgs.push_back("elf32lriscv");
222 break;
223
224 case llvm::Triple::riscv64:
225 CmdArgs.push_back("-m");
226 CmdArgs.push_back("elf64lriscv");
227 break;
228
229 case llvm::Triple::sparc:
230 CmdArgs.push_back("-m");
231 CmdArgs.push_back("elf32_sparc");
232 break;
233
234 case llvm::Triple::sparcv9:
235 CmdArgs.push_back("-m");
236 CmdArgs.push_back("elf64_sparc");
237 break;
238
239 default:
240 break;
241 }
242
243 if (Triple.isRISCV()) {
244 CmdArgs.push_back("-X");
245 if (Args.hasArg(options::OPT_mno_relax))
246 CmdArgs.push_back("--no-relax");
247 }
248
249 assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
250 if (Output.isFilename()) {
251 CmdArgs.push_back("-o");
252 CmdArgs.push_back(Output.getFilename());
253 }
254
255 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
256 options::OPT_r)) {
257 const char *crt0 = nullptr;
258 const char *crtbegin = nullptr;
259 if (!Shared)
260 crt0 = "crt0.o";
261
262 if (Shared || Pie)
263 crtbegin = "crtbeginS.o";
264 else
265 crtbegin = "crtbegin.o";
266
267 if (crt0)
268 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt0)));
269 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
270 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
271 }
272
273 Args.addAllArgs(CmdArgs, {options::OPT_L, options::OPT_T_Group,
274 options::OPT_s, options::OPT_t});
275 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
276
277 bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
278 bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
279 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
280
281 const SanitizerArgs &SanArgs = ToolChain.getSanitizerArgs(Args);
282 if (SanArgs.needsSharedRt()) {
283 CmdArgs.push_back("-rpath");
284 CmdArgs.push_back(Args.MakeArgString(ToolChain.getCompilerRTPath()));
285 }
286
287 bool useLibgcc = true;
288 switch (ToolChain.getArch()) {
289 case llvm::Triple::aarch64:
290 case llvm::Triple::aarch64_be:
291 case llvm::Triple::arm:
292 case llvm::Triple::armeb:
293 case llvm::Triple::thumb:
294 case llvm::Triple::thumbeb:
295 case llvm::Triple::ppc:
296 case llvm::Triple::ppc64:
297 case llvm::Triple::ppc64le:
298 case llvm::Triple::riscv32:
299 case llvm::Triple::riscv64:
300 case llvm::Triple::sparc:
301 case llvm::Triple::sparcv9:
302 case llvm::Triple::x86:
303 case llvm::Triple::x86_64:
304 useLibgcc = false;
305 break;
306 default:
307 break;
308 }
309
310 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
311 options::OPT_r)) {
312 // Use the static OpenMP runtime with -static-openmp
313 bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) && !Static;
314 addOpenMPRuntime(C, CmdArgs, ToolChain, Args, StaticOpenMP);
315
316 if (D.CCCIsCXX()) {
317 if (ToolChain.ShouldLinkCXXStdlib(Args))
318 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
319 CmdArgs.push_back("-lm");
320 }
321
322 // Silence warnings when linking C code with a C++ '-stdlib' argument.
323 Args.ClaimAllArgs(options::OPT_stdlib_EQ);
324
325 // Additional linker set-up and flags for Fortran. This is required in order
326 // to generate executables. As Fortran runtime depends on the C runtime,
327 // these dependencies need to be listed before the C runtime below (i.e.
328 // AddRunTimeLibs).
329 if (D.IsFlangMode() &&
330 !Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
331 ToolChain.addFortranRuntimeLibraryPath(Args, CmdArgs);
332 ToolChain.addFortranRuntimeLibs(Args, CmdArgs);
333 CmdArgs.push_back("-lm");
334 }
335
336 if (NeedsSanitizerDeps)
337 linkSanitizerRuntimeDeps(ToolChain, Args, CmdArgs);
338 if (NeedsXRayDeps)
339 linkXRayRuntimeDeps(ToolChain, Args, CmdArgs);
340 if (Args.hasArg(options::OPT_pthread))
341 CmdArgs.push_back("-lpthread");
342 CmdArgs.push_back("-lc");
343
344 if (useLibgcc) {
345 if (Static) {
346 // libgcc_eh depends on libc, so resolve as much as possible,
347 // pull in any new requirements from libc and then get the rest
348 // of libgcc.
349 CmdArgs.push_back("-lgcc_eh");
350 CmdArgs.push_back("-lc");
351 CmdArgs.push_back("-lgcc");
352 } else {
353 CmdArgs.push_back("-lgcc");
354 CmdArgs.push_back("--as-needed");
355 CmdArgs.push_back("-lgcc_s");
356 CmdArgs.push_back("--no-as-needed");
357 }
358 }
359 }
360
361 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
362 options::OPT_r)) {
363 const char *crtend = nullptr;
364 if (Shared || Pie)
365 crtend = "crtendS.o";
366 else
367 crtend = "crtend.o";
368
369 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
370 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
371 }
372
373 ToolChain.addProfileRTLibs(Args, CmdArgs);
374
375 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
376 C.addCommand(std::make_unique<Command>(JA, *this,
377 ResponseFileSupport::AtFileCurCP(),
378 Exec, CmdArgs, Inputs, Output));
379 }
380
381 /// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
382
NetBSD(const Driver & D,const llvm::Triple & Triple,const ArgList & Args)383 NetBSD::NetBSD(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
384 : Generic_ELF(D, Triple, Args) {
385 if (!Args.hasArg(options::OPT_nostdlib)) {
386 // When targeting a 32-bit platform, try the special directory used on
387 // 64-bit hosts, and only fall back to the main library directory if that
388 // doesn't work.
389 // FIXME: It'd be nicer to test if this directory exists, but I'm not sure
390 // what all logic is needed to emulate the '=' prefix here.
391 switch (Triple.getArch()) {
392 case llvm::Triple::x86:
393 getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/i386"));
394 break;
395 case llvm::Triple::arm:
396 case llvm::Triple::armeb:
397 case llvm::Triple::thumb:
398 case llvm::Triple::thumbeb:
399 switch (Triple.getEnvironment()) {
400 case llvm::Triple::EABI:
401 case llvm::Triple::GNUEABI:
402 getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/eabi"));
403 break;
404 case llvm::Triple::EABIHF:
405 case llvm::Triple::GNUEABIHF:
406 getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/eabihf"));
407 break;
408 default:
409 getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/oabi"));
410 break;
411 }
412 break;
413 case llvm::Triple::mips64:
414 case llvm::Triple::mips64el:
415 if (tools::mips::hasMipsAbiArg(Args, "o32"))
416 getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/o32"));
417 else if (tools::mips::hasMipsAbiArg(Args, "64"))
418 getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/64"));
419 break;
420 case llvm::Triple::ppc:
421 getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/powerpc"));
422 break;
423 case llvm::Triple::sparc:
424 getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib/sparc"));
425 break;
426 default:
427 break;
428 }
429
430 getFilePaths().push_back(concat(getDriver().SysRoot, "/usr/lib"));
431 }
432 }
433
buildAssembler() const434 Tool *NetBSD::buildAssembler() const {
435 return new tools::netbsd::Assembler(*this);
436 }
437
buildLinker() const438 Tool *NetBSD::buildLinker() const { return new tools::netbsd::Linker(*this); }
439
GetDefaultCXXStdlibType() const440 ToolChain::CXXStdlibType NetBSD::GetDefaultCXXStdlibType() const {
441 switch (getArch()) {
442 case llvm::Triple::aarch64:
443 case llvm::Triple::aarch64_be:
444 case llvm::Triple::arm:
445 case llvm::Triple::armeb:
446 case llvm::Triple::thumb:
447 case llvm::Triple::thumbeb:
448 case llvm::Triple::ppc:
449 case llvm::Triple::ppc64:
450 case llvm::Triple::ppc64le:
451 case llvm::Triple::riscv32:
452 case llvm::Triple::riscv64:
453 case llvm::Triple::sparc:
454 case llvm::Triple::sparcv9:
455 case llvm::Triple::x86:
456 case llvm::Triple::x86_64:
457 return ToolChain::CST_Libcxx;
458 default:
459 break;
460 }
461 return ToolChain::CST_Libstdcxx;
462 }
463
AddClangSystemIncludeArgs(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const464 void NetBSD::AddClangSystemIncludeArgs(
465 const llvm::opt::ArgList &DriverArgs,
466 llvm::opt::ArgStringList &CC1Args) const {
467 const Driver &D = getDriver();
468
469 if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
470 return;
471
472 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
473 SmallString<128> Dir(D.ResourceDir);
474 llvm::sys::path::append(Dir, "include");
475 addSystemInclude(DriverArgs, CC1Args, Dir.str());
476 }
477
478 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
479 return;
480
481 // Check for configure-time C include directories.
482 StringRef CIncludeDirs(C_INCLUDE_DIRS);
483 if (CIncludeDirs != "") {
484 SmallVector<StringRef, 5> dirs;
485 CIncludeDirs.split(dirs, ":");
486 for (StringRef dir : dirs) {
487 StringRef Prefix =
488 llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
489 addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
490 }
491 return;
492 }
493
494 addExternCSystemInclude(DriverArgs, CC1Args,
495 concat(D.SysRoot, "/usr/include"));
496 }
497
addLibCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const498 void NetBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
499 llvm::opt::ArgStringList &CC1Args) const {
500 const std::string Candidates[] = {
501 // directory relative to build tree
502 concat(getDriver().Dir, "/../include/c++/v1"),
503 // system install with full upstream path
504 concat(getDriver().SysRoot, "/usr/include/c++/v1"),
505 // system install from src
506 concat(getDriver().SysRoot, "/usr/include/c++"),
507 };
508
509 for (const auto &IncludePath : Candidates) {
510 if (!getVFS().exists(IncludePath + "/__config"))
511 continue;
512
513 // Use the first candidate that looks valid.
514 addSystemInclude(DriverArgs, CC1Args, IncludePath);
515 return;
516 }
517 }
518
addLibStdCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const519 void NetBSD::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
520 llvm::opt::ArgStringList &CC1Args) const {
521 addLibStdCXXIncludePaths(concat(getDriver().SysRoot, "/usr/include/g++"), "", "",
522 DriverArgs, CC1Args);
523 }
524
GetExceptionModel(const ArgList & Args) const525 llvm::ExceptionHandling NetBSD::GetExceptionModel(const ArgList &Args) const {
526 // NetBSD uses Dwarf exceptions on ARM.
527 llvm::Triple::ArchType TArch = getTriple().getArch();
528 if (TArch == llvm::Triple::arm || TArch == llvm::Triple::armeb ||
529 TArch == llvm::Triple::thumb || TArch == llvm::Triple::thumbeb)
530 return llvm::ExceptionHandling::DwarfCFI;
531 return llvm::ExceptionHandling::None;
532 }
533
getSupportedSanitizers() const534 SanitizerMask NetBSD::getSupportedSanitizers() const {
535 const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
536 const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
537 SanitizerMask Res = ToolChain::getSupportedSanitizers();
538 if (IsX86 || IsX86_64) {
539 Res |= SanitizerKind::Address;
540 Res |= SanitizerKind::PointerCompare;
541 Res |= SanitizerKind::PointerSubtract;
542 Res |= SanitizerKind::Leak;
543 Res |= SanitizerKind::SafeStack;
544 Res |= SanitizerKind::Scudo;
545 Res |= SanitizerKind::Vptr;
546 }
547 if (IsX86_64) {
548 Res |= SanitizerKind::DataFlow;
549 Res |= SanitizerKind::Fuzzer;
550 Res |= SanitizerKind::FuzzerNoLink;
551 Res |= SanitizerKind::HWAddress;
552 Res |= SanitizerKind::KernelAddress;
553 Res |= SanitizerKind::KernelHWAddress;
554 Res |= SanitizerKind::KernelMemory;
555 Res |= SanitizerKind::Memory;
556 Res |= SanitizerKind::Thread;
557 }
558 return Res;
559 }
560
addClangTargetOptions(const ArgList & DriverArgs,ArgStringList & CC1Args,Action::OffloadKind) const561 void NetBSD::addClangTargetOptions(const ArgList &DriverArgs,
562 ArgStringList &CC1Args,
563 Action::OffloadKind) const {
564 const SanitizerArgs &SanArgs = getSanitizerArgs(DriverArgs);
565 if (SanArgs.hasAnySanitizer())
566 CC1Args.push_back("-D_REENTRANT");
567 }
568