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/Config/config.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 toolchains::NetBSD &ToolChain =
34 static_cast<const toolchains::NetBSD &>(getToolChain());
35 const Driver &D = ToolChain.getDriver();
36 const llvm::Triple &Triple = ToolChain.getTriple();
37
38 claimNoWarnArgs(Args);
39 ArgStringList CmdArgs;
40
41 // GNU as needs different flags for creating the correct output format
42 // on architectures with different ABIs or optional feature sets.
43 switch (ToolChain.getArch()) {
44 case llvm::Triple::x86:
45 CmdArgs.push_back("--32");
46 break;
47 case llvm::Triple::arm:
48 case llvm::Triple::armeb:
49 case llvm::Triple::thumb:
50 case llvm::Triple::thumbeb: {
51 StringRef MArch, MCPU;
52 arm::getARMArchCPUFromArgs(Args, MArch, MCPU, /*FromAs*/ true);
53 std::string Arch = arm::getARMTargetCPU(MCPU, MArch, Triple);
54 CmdArgs.push_back(Args.MakeArgString("-mcpu=" + Arch));
55 break;
56 }
57
58 case llvm::Triple::mips:
59 case llvm::Triple::mipsel:
60 case llvm::Triple::mips64:
61 case llvm::Triple::mips64el: {
62 StringRef CPUName;
63 StringRef ABIName;
64 mips::getMipsCPUAndABI(Args, Triple, CPUName, ABIName);
65
66 CmdArgs.push_back("-march");
67 CmdArgs.push_back(CPUName.data());
68
69 CmdArgs.push_back("-mabi");
70 CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data());
71
72 if (Triple.isLittleEndian())
73 CmdArgs.push_back("-EL");
74 else
75 CmdArgs.push_back("-EB");
76
77 AddAssemblerKPIC(ToolChain, Args, CmdArgs);
78 break;
79 }
80
81 case llvm::Triple::sparc:
82 case llvm::Triple::sparcel: {
83 CmdArgs.push_back("-32");
84 std::string CPU = getCPUName(D, Args, Triple);
85 CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, Triple));
86 AddAssemblerKPIC(ToolChain, Args, CmdArgs);
87 break;
88 }
89
90 case llvm::Triple::sparcv9: {
91 CmdArgs.push_back("-64");
92 std::string CPU = getCPUName(D, Args, Triple);
93 CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, Triple));
94 AddAssemblerKPIC(ToolChain, Args, CmdArgs);
95 break;
96 }
97
98 default:
99 break;
100 }
101
102 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
103
104 CmdArgs.push_back("-o");
105 CmdArgs.push_back(Output.getFilename());
106
107 for (const auto &II : Inputs)
108 CmdArgs.push_back(II.getFilename());
109
110 const char *Exec = Args.MakeArgString((ToolChain.GetProgramPath("as")));
111 C.addCommand(std::make_unique<Command>(JA, *this,
112 ResponseFileSupport::AtFileCurCP(),
113 Exec, CmdArgs, Inputs, Output));
114 }
115
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const116 void netbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
117 const InputInfo &Output,
118 const InputInfoList &Inputs,
119 const ArgList &Args,
120 const char *LinkingOutput) const {
121 const toolchains::NetBSD &ToolChain =
122 static_cast<const toolchains::NetBSD &>(getToolChain());
123 const Driver &D = ToolChain.getDriver();
124 const llvm::Triple &Triple = ToolChain.getTriple();
125
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 (Args.hasArg(options::OPT_static)) {
133 CmdArgs.push_back("-Bstatic");
134 if (Args.hasArg(options::OPT_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 (Args.hasArg(options::OPT_shared)) {
142 CmdArgs.push_back("-Bshareable");
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 (ToolChain.getArch()) {
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 (ToolChain.getArch() == 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 (ToolChain.getArch() == 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::sparc:
220 CmdArgs.push_back("-m");
221 CmdArgs.push_back("elf32_sparc");
222 break;
223
224 case llvm::Triple::sparcv9:
225 CmdArgs.push_back("-m");
226 CmdArgs.push_back("elf64_sparc");
227 break;
228
229 default:
230 break;
231 }
232
233 if (Output.isFilename()) {
234 CmdArgs.push_back("-o");
235 CmdArgs.push_back(Output.getFilename());
236 } else {
237 assert(Output.isNothing() && "Invalid output.");
238 }
239
240 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
241 options::OPT_r)) {
242 if (!Args.hasArg(options::OPT_shared)) {
243 CmdArgs.push_back(
244 Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
245 }
246 CmdArgs.push_back(
247 Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
248 if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie)) {
249 CmdArgs.push_back(
250 Args.MakeArgString(ToolChain.GetFilePath("crtbeginS.o")));
251 } else {
252 CmdArgs.push_back(
253 Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
254 }
255 }
256
257 Args.AddAllArgs(CmdArgs, options::OPT_L);
258 Args.AddAllArgs(CmdArgs, options::OPT_T_Group);
259 Args.AddAllArgs(CmdArgs, options::OPT_e);
260 Args.AddAllArgs(CmdArgs, options::OPT_s);
261 Args.AddAllArgs(CmdArgs, options::OPT_t);
262 Args.AddAllArgs(CmdArgs, options::OPT_Z_Flag);
263 Args.AddAllArgs(CmdArgs, options::OPT_r);
264
265 bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
266 bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
267 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
268
269 const SanitizerArgs &SanArgs = ToolChain.getSanitizerArgs(Args);
270 if (SanArgs.needsSharedRt()) {
271 CmdArgs.push_back("-rpath");
272 CmdArgs.push_back(Args.MakeArgString(ToolChain.getCompilerRTPath()));
273 }
274
275 VersionTuple OsVersion = Triple.getOSVersion();
276 bool useLibgcc = true;
277 if (OsVersion >= VersionTuple(7) || OsVersion.getMajor() == 0) {
278 switch (ToolChain.getArch()) {
279 case llvm::Triple::aarch64:
280 case llvm::Triple::aarch64_be:
281 case llvm::Triple::arm:
282 case llvm::Triple::armeb:
283 case llvm::Triple::thumb:
284 case llvm::Triple::thumbeb:
285 case llvm::Triple::ppc:
286 case llvm::Triple::ppc64:
287 case llvm::Triple::ppc64le:
288 case llvm::Triple::sparc:
289 case llvm::Triple::sparcv9:
290 case llvm::Triple::x86:
291 case llvm::Triple::x86_64:
292 useLibgcc = false;
293 break;
294 default:
295 break;
296 }
297 }
298
299 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs,
300 options::OPT_r)) {
301 // Use the static OpenMP runtime with -static-openmp
302 bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) &&
303 !Args.hasArg(options::OPT_static);
304 addOpenMPRuntime(CmdArgs, ToolChain, Args, StaticOpenMP);
305
306 if (D.CCCIsCXX()) {
307 if (ToolChain.ShouldLinkCXXStdlib(Args))
308 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
309 CmdArgs.push_back("-lm");
310 }
311 if (NeedsSanitizerDeps)
312 linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
313 if (NeedsXRayDeps)
314 linkXRayRuntimeDeps(ToolChain, CmdArgs);
315 if (Args.hasArg(options::OPT_pthread))
316 CmdArgs.push_back("-lpthread");
317 CmdArgs.push_back("-lc");
318
319 if (useLibgcc) {
320 if (Args.hasArg(options::OPT_static)) {
321 // libgcc_eh depends on libc, so resolve as much as possible,
322 // pull in any new requirements from libc and then get the rest
323 // of libgcc.
324 CmdArgs.push_back("-lgcc_eh");
325 CmdArgs.push_back("-lc");
326 CmdArgs.push_back("-lgcc");
327 } else {
328 CmdArgs.push_back("-lgcc");
329 CmdArgs.push_back("--as-needed");
330 CmdArgs.push_back("-lgcc_s");
331 CmdArgs.push_back("--no-as-needed");
332 }
333 }
334 }
335
336 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
337 options::OPT_r)) {
338 if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie))
339 CmdArgs.push_back(
340 Args.MakeArgString(ToolChain.GetFilePath("crtendS.o")));
341 else
342 CmdArgs.push_back(
343 Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
344 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
345 }
346
347 ToolChain.addProfileRTLibs(Args, CmdArgs);
348
349 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
350 C.addCommand(std::make_unique<Command>(JA, *this,
351 ResponseFileSupport::AtFileCurCP(),
352 Exec, CmdArgs, Inputs, Output));
353 }
354
355 /// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
356
NetBSD(const Driver & D,const llvm::Triple & Triple,const ArgList & Args)357 NetBSD::NetBSD(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
358 : Generic_ELF(D, Triple, Args) {
359 if (!Args.hasArg(options::OPT_nostdlib)) {
360 // When targeting a 32-bit platform, try the special directory used on
361 // 64-bit hosts, and only fall back to the main library directory if that
362 // doesn't work.
363 // FIXME: It'd be nicer to test if this directory exists, but I'm not sure
364 // what all logic is needed to emulate the '=' prefix here.
365 switch (Triple.getArch()) {
366 case llvm::Triple::x86:
367 getFilePaths().push_back("=/usr/lib/i386");
368 break;
369 case llvm::Triple::arm:
370 case llvm::Triple::armeb:
371 case llvm::Triple::thumb:
372 case llvm::Triple::thumbeb:
373 switch (Triple.getEnvironment()) {
374 case llvm::Triple::EABI:
375 case llvm::Triple::GNUEABI:
376 getFilePaths().push_back("=/usr/lib/eabi");
377 break;
378 case llvm::Triple::EABIHF:
379 case llvm::Triple::GNUEABIHF:
380 getFilePaths().push_back("=/usr/lib/eabihf");
381 break;
382 default:
383 getFilePaths().push_back("=/usr/lib/oabi");
384 break;
385 }
386 break;
387 case llvm::Triple::mips64:
388 case llvm::Triple::mips64el:
389 if (tools::mips::hasMipsAbiArg(Args, "o32"))
390 getFilePaths().push_back("=/usr/lib/o32");
391 else if (tools::mips::hasMipsAbiArg(Args, "64"))
392 getFilePaths().push_back("=/usr/lib/64");
393 break;
394 case llvm::Triple::ppc:
395 getFilePaths().push_back("=/usr/lib/powerpc");
396 break;
397 case llvm::Triple::sparc:
398 getFilePaths().push_back("=/usr/lib/sparc");
399 break;
400 default:
401 break;
402 }
403
404 getFilePaths().push_back("=/usr/lib");
405 }
406 }
407
buildAssembler() const408 Tool *NetBSD::buildAssembler() const {
409 return new tools::netbsd::Assembler(*this);
410 }
411
buildLinker() const412 Tool *NetBSD::buildLinker() const { return new tools::netbsd::Linker(*this); }
413
GetDefaultCXXStdlibType() const414 ToolChain::CXXStdlibType NetBSD::GetDefaultCXXStdlibType() const {
415 VersionTuple OsVersion = getTriple().getOSVersion();
416 if (OsVersion >= VersionTuple(7) || OsVersion.getMajor() == 0) {
417 switch (getArch()) {
418 case llvm::Triple::aarch64:
419 case llvm::Triple::aarch64_be:
420 case llvm::Triple::arm:
421 case llvm::Triple::armeb:
422 case llvm::Triple::thumb:
423 case llvm::Triple::thumbeb:
424 case llvm::Triple::ppc:
425 case llvm::Triple::ppc64:
426 case llvm::Triple::ppc64le:
427 case llvm::Triple::sparc:
428 case llvm::Triple::sparcv9:
429 case llvm::Triple::x86:
430 case llvm::Triple::x86_64:
431 return ToolChain::CST_Libcxx;
432 default:
433 break;
434 }
435 }
436 return ToolChain::CST_Libstdcxx;
437 }
438
AddClangSystemIncludeArgs(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const439 void NetBSD::AddClangSystemIncludeArgs(
440 const llvm::opt::ArgList &DriverArgs,
441 llvm::opt::ArgStringList &CC1Args) const {
442 const Driver &D = getDriver();
443
444 if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
445 return;
446
447 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
448 SmallString<128> Dir(D.ResourceDir);
449 llvm::sys::path::append(Dir, "include");
450 addSystemInclude(DriverArgs, CC1Args, Dir.str());
451 }
452
453 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
454 return;
455
456 // Check for configure-time C include directories.
457 StringRef CIncludeDirs(C_INCLUDE_DIRS);
458 if (CIncludeDirs != "") {
459 SmallVector<StringRef, 5> dirs;
460 CIncludeDirs.split(dirs, ":");
461 for (StringRef dir : dirs) {
462 StringRef Prefix =
463 llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
464 addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
465 }
466 return;
467 }
468
469 addExternCSystemInclude(DriverArgs, CC1Args,
470 concat(D.SysRoot, "/usr/include"));
471 }
472
addLibCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const473 void NetBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
474 llvm::opt::ArgStringList &CC1Args) const {
475 const std::string Candidates[] = {
476 // directory relative to build tree
477 getDriver().Dir + "/../include/c++/v1",
478 // system install with full upstream path
479 getDriver().SysRoot + "/usr/include/c++/v1",
480 // system install from src
481 getDriver().SysRoot + "/usr/include/c++",
482 };
483
484 for (const auto &IncludePath : Candidates) {
485 if (!getVFS().exists(IncludePath + "/__config"))
486 continue;
487
488 // Use the first candidate that looks valid.
489 addSystemInclude(DriverArgs, CC1Args, IncludePath);
490 return;
491 }
492 }
493
addLibStdCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const494 void NetBSD::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
495 llvm::opt::ArgStringList &CC1Args) const {
496 addLibStdCXXIncludePaths(getDriver().SysRoot + "/usr/include/g++", "", "",
497 DriverArgs, CC1Args);
498 }
499
GetExceptionModel(const ArgList & Args) const500 llvm::ExceptionHandling NetBSD::GetExceptionModel(const ArgList &Args) const {
501 // NetBSD uses Dwarf exceptions on ARM.
502 llvm::Triple::ArchType TArch = getTriple().getArch();
503 if (TArch == llvm::Triple::arm || TArch == llvm::Triple::armeb ||
504 TArch == llvm::Triple::thumb || TArch == llvm::Triple::thumbeb)
505 return llvm::ExceptionHandling::DwarfCFI;
506 return llvm::ExceptionHandling::None;
507 }
508
getSupportedSanitizers() const509 SanitizerMask NetBSD::getSupportedSanitizers() const {
510 const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
511 const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
512 SanitizerMask Res = ToolChain::getSupportedSanitizers();
513 if (IsX86 || IsX86_64) {
514 Res |= SanitizerKind::Address;
515 Res |= SanitizerKind::PointerCompare;
516 Res |= SanitizerKind::PointerSubtract;
517 Res |= SanitizerKind::Function;
518 Res |= SanitizerKind::Leak;
519 Res |= SanitizerKind::SafeStack;
520 Res |= SanitizerKind::Scudo;
521 Res |= SanitizerKind::Vptr;
522 }
523 if (IsX86_64) {
524 Res |= SanitizerKind::DataFlow;
525 Res |= SanitizerKind::Fuzzer;
526 Res |= SanitizerKind::FuzzerNoLink;
527 Res |= SanitizerKind::HWAddress;
528 Res |= SanitizerKind::KernelAddress;
529 Res |= SanitizerKind::KernelHWAddress;
530 Res |= SanitizerKind::KernelMemory;
531 Res |= SanitizerKind::Memory;
532 Res |= SanitizerKind::Thread;
533 }
534 return Res;
535 }
536
addClangTargetOptions(const ArgList & DriverArgs,ArgStringList & CC1Args,Action::OffloadKind) const537 void NetBSD::addClangTargetOptions(const ArgList &DriverArgs,
538 ArgStringList &CC1Args,
539 Action::OffloadKind) const {
540 const SanitizerArgs &SanArgs = getSanitizerArgs(DriverArgs);
541 if (SanArgs.hasAnySanitizer())
542 CC1Args.push_back("-D_REENTRANT");
543
544 VersionTuple OsVersion = getTriple().getOSVersion();
545 bool UseInitArrayDefault =
546 OsVersion >= VersionTuple(9) || OsVersion.getMajor() == 0 ||
547 getTriple().getArch() == llvm::Triple::aarch64 ||
548 getTriple().getArch() == llvm::Triple::aarch64_be ||
549 getTriple().getArch() == llvm::Triple::arm ||
550 getTriple().getArch() == llvm::Triple::armeb;
551
552 if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
553 options::OPT_fno_use_init_array, UseInitArrayDefault))
554 CC1Args.push_back("-fno-use-init-array");
555 }
556