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
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const27 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(std::make_unique<Command>(JA, *this,
107 ResponseFileSupport::AtFileCurCP(),
108 Exec, CmdArgs, Inputs, Output));
109 }
110
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const111 void netbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
112 const InputInfo &Output,
113 const InputInfoList &Inputs,
114 const ArgList &Args,
115 const char *LinkingOutput) const {
116 const toolchains::NetBSD &ToolChain =
117 static_cast<const toolchains::NetBSD &>(getToolChain());
118 const Driver &D = ToolChain.getDriver();
119 ArgStringList CmdArgs;
120
121 if (!D.SysRoot.empty())
122 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
123
124 CmdArgs.push_back("--eh-frame-hdr");
125 if (Args.hasArg(options::OPT_static)) {
126 CmdArgs.push_back("-Bstatic");
127 if (Args.hasArg(options::OPT_pie)) {
128 Args.AddAllArgs(CmdArgs, options::OPT_pie);
129 CmdArgs.push_back("--no-dynamic-linker");
130 }
131 } else {
132 if (Args.hasArg(options::OPT_rdynamic))
133 CmdArgs.push_back("-export-dynamic");
134 if (Args.hasArg(options::OPT_shared)) {
135 CmdArgs.push_back("-Bshareable");
136 } else {
137 Args.AddAllArgs(CmdArgs, options::OPT_pie);
138 CmdArgs.push_back("-dynamic-linker");
139 CmdArgs.push_back("/libexec/ld.elf_so");
140 }
141 }
142
143 // Many NetBSD architectures support more than one ABI.
144 // Determine the correct emulation for ld.
145 switch (ToolChain.getArch()) {
146 case llvm::Triple::x86:
147 CmdArgs.push_back("-m");
148 CmdArgs.push_back("elf_i386");
149 break;
150 case llvm::Triple::arm:
151 case llvm::Triple::thumb:
152 CmdArgs.push_back("-m");
153 switch (ToolChain.getTriple().getEnvironment()) {
154 case llvm::Triple::EABI:
155 case llvm::Triple::GNUEABI:
156 CmdArgs.push_back("armelf_nbsd_eabi");
157 break;
158 case llvm::Triple::EABIHF:
159 case llvm::Triple::GNUEABIHF:
160 CmdArgs.push_back("armelf_nbsd_eabihf");
161 break;
162 default:
163 CmdArgs.push_back("armelf_nbsd");
164 break;
165 }
166 break;
167 case llvm::Triple::armeb:
168 case llvm::Triple::thumbeb:
169 arm::appendBE8LinkFlag(Args, CmdArgs, ToolChain.getEffectiveTriple());
170 CmdArgs.push_back("-m");
171 switch (ToolChain.getTriple().getEnvironment()) {
172 case llvm::Triple::EABI:
173 case llvm::Triple::GNUEABI:
174 CmdArgs.push_back("armelfb_nbsd_eabi");
175 break;
176 case llvm::Triple::EABIHF:
177 case llvm::Triple::GNUEABIHF:
178 CmdArgs.push_back("armelfb_nbsd_eabihf");
179 break;
180 default:
181 CmdArgs.push_back("armelfb_nbsd");
182 break;
183 }
184 break;
185 case llvm::Triple::mips64:
186 case llvm::Triple::mips64el:
187 if (mips::hasMipsAbiArg(Args, "32")) {
188 CmdArgs.push_back("-m");
189 if (ToolChain.getArch() == llvm::Triple::mips64)
190 CmdArgs.push_back("elf32btsmip");
191 else
192 CmdArgs.push_back("elf32ltsmip");
193 } else if (mips::hasMipsAbiArg(Args, "64")) {
194 CmdArgs.push_back("-m");
195 if (ToolChain.getArch() == llvm::Triple::mips64)
196 CmdArgs.push_back("elf64btsmip");
197 else
198 CmdArgs.push_back("elf64ltsmip");
199 }
200 break;
201 case llvm::Triple::ppc:
202 CmdArgs.push_back("-m");
203 CmdArgs.push_back("elf32ppc_nbsd");
204 break;
205
206 case llvm::Triple::ppc64:
207 case llvm::Triple::ppc64le:
208 CmdArgs.push_back("-m");
209 CmdArgs.push_back("elf64ppc");
210 break;
211
212 case llvm::Triple::sparc:
213 CmdArgs.push_back("-m");
214 CmdArgs.push_back("elf32_sparc");
215 break;
216
217 case llvm::Triple::sparcv9:
218 CmdArgs.push_back("-m");
219 CmdArgs.push_back("elf64_sparc");
220 break;
221
222 default:
223 break;
224 }
225
226 if (Output.isFilename()) {
227 CmdArgs.push_back("-o");
228 CmdArgs.push_back(Output.getFilename());
229 } else {
230 assert(Output.isNothing() && "Invalid output.");
231 }
232
233 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
234 if (!Args.hasArg(options::OPT_shared)) {
235 CmdArgs.push_back(
236 Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
237 }
238 CmdArgs.push_back(
239 Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
240 if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie)) {
241 CmdArgs.push_back(
242 Args.MakeArgString(ToolChain.GetFilePath("crtbeginS.o")));
243 } else {
244 CmdArgs.push_back(
245 Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
246 }
247 }
248
249 Args.AddAllArgs(CmdArgs, options::OPT_L);
250 Args.AddAllArgs(CmdArgs, options::OPT_T_Group);
251 Args.AddAllArgs(CmdArgs, options::OPT_e);
252 Args.AddAllArgs(CmdArgs, options::OPT_s);
253 Args.AddAllArgs(CmdArgs, options::OPT_t);
254 Args.AddAllArgs(CmdArgs, options::OPT_Z_Flag);
255 Args.AddAllArgs(CmdArgs, options::OPT_r);
256
257 bool NeedsSanitizerDeps = addSanitizerRuntimes(getToolChain(), Args, CmdArgs);
258 bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
259 AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
260
261 const SanitizerArgs &SanArgs = ToolChain.getSanitizerArgs();
262 if (SanArgs.needsSharedRt()) {
263 CmdArgs.push_back("-rpath");
264 CmdArgs.push_back(Args.MakeArgString(
265 ToolChain.getCompilerRTPath().c_str()));
266 }
267
268 unsigned Major, Minor, Micro;
269 ToolChain.getTriple().getOSVersion(Major, Minor, Micro);
270 bool useLibgcc = true;
271 if (Major >= 7 || Major == 0) {
272 switch (ToolChain.getArch()) {
273 case llvm::Triple::aarch64:
274 case llvm::Triple::aarch64_be:
275 case llvm::Triple::arm:
276 case llvm::Triple::armeb:
277 case llvm::Triple::thumb:
278 case llvm::Triple::thumbeb:
279 case llvm::Triple::ppc:
280 case llvm::Triple::ppc64:
281 case llvm::Triple::ppc64le:
282 case llvm::Triple::sparc:
283 case llvm::Triple::sparcv9:
284 case llvm::Triple::x86:
285 case llvm::Triple::x86_64:
286 useLibgcc = false;
287 break;
288 default:
289 break;
290 }
291 }
292
293 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
294 // Use the static OpenMP runtime with -static-openmp
295 bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) &&
296 !Args.hasArg(options::OPT_static);
297 addOpenMPRuntime(CmdArgs, getToolChain(), Args, StaticOpenMP);
298
299 if (D.CCCIsCXX()) {
300 if (ToolChain.ShouldLinkCXXStdlib(Args))
301 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
302 CmdArgs.push_back("-lm");
303 }
304 if (NeedsSanitizerDeps)
305 linkSanitizerRuntimeDeps(getToolChain(), CmdArgs);
306 if (NeedsXRayDeps)
307 linkXRayRuntimeDeps(ToolChain, CmdArgs);
308 if (Args.hasArg(options::OPT_pthread))
309 CmdArgs.push_back("-lpthread");
310 CmdArgs.push_back("-lc");
311
312 if (useLibgcc) {
313 if (Args.hasArg(options::OPT_static)) {
314 // libgcc_eh depends on libc, so resolve as much as possible,
315 // pull in any new requirements from libc and then get the rest
316 // of libgcc.
317 CmdArgs.push_back("-lgcc_eh");
318 CmdArgs.push_back("-lc");
319 CmdArgs.push_back("-lgcc");
320 } else {
321 CmdArgs.push_back("-lgcc");
322 CmdArgs.push_back("--as-needed");
323 CmdArgs.push_back("-lgcc_s");
324 CmdArgs.push_back("--no-as-needed");
325 }
326 }
327 }
328
329 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
330 if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie))
331 CmdArgs.push_back(
332 Args.MakeArgString(ToolChain.GetFilePath("crtendS.o")));
333 else
334 CmdArgs.push_back(
335 Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
336 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
337 }
338
339 ToolChain.addProfileRTLibs(Args, CmdArgs);
340
341 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
342 C.addCommand(std::make_unique<Command>(JA, *this,
343 ResponseFileSupport::AtFileCurCP(),
344 Exec, CmdArgs, Inputs, Output));
345 }
346
347 /// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
348
NetBSD(const Driver & D,const llvm::Triple & Triple,const ArgList & Args)349 NetBSD::NetBSD(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
350 : Generic_ELF(D, Triple, Args) {
351 if (!Args.hasArg(options::OPT_nostdlib)) {
352 // When targeting a 32-bit platform, try the special directory used on
353 // 64-bit hosts, and only fall back to the main library directory if that
354 // doesn't work.
355 // FIXME: It'd be nicer to test if this directory exists, but I'm not sure
356 // what all logic is needed to emulate the '=' prefix here.
357 switch (Triple.getArch()) {
358 case llvm::Triple::x86:
359 getFilePaths().push_back("=/usr/lib/i386");
360 break;
361 case llvm::Triple::arm:
362 case llvm::Triple::armeb:
363 case llvm::Triple::thumb:
364 case llvm::Triple::thumbeb:
365 switch (Triple.getEnvironment()) {
366 case llvm::Triple::EABI:
367 case llvm::Triple::GNUEABI:
368 getFilePaths().push_back("=/usr/lib/eabi");
369 break;
370 case llvm::Triple::EABIHF:
371 case llvm::Triple::GNUEABIHF:
372 getFilePaths().push_back("=/usr/lib/eabihf");
373 break;
374 default:
375 getFilePaths().push_back("=/usr/lib/oabi");
376 break;
377 }
378 break;
379 case llvm::Triple::mips64:
380 case llvm::Triple::mips64el:
381 if (tools::mips::hasMipsAbiArg(Args, "o32"))
382 getFilePaths().push_back("=/usr/lib/o32");
383 else if (tools::mips::hasMipsAbiArg(Args, "64"))
384 getFilePaths().push_back("=/usr/lib/64");
385 break;
386 case llvm::Triple::ppc:
387 getFilePaths().push_back("=/usr/lib/powerpc");
388 break;
389 case llvm::Triple::sparc:
390 getFilePaths().push_back("=/usr/lib/sparc");
391 break;
392 default:
393 break;
394 }
395
396 getFilePaths().push_back("=/usr/lib");
397 }
398 }
399
buildAssembler() const400 Tool *NetBSD::buildAssembler() const {
401 return new tools::netbsd::Assembler(*this);
402 }
403
buildLinker() const404 Tool *NetBSD::buildLinker() const { return new tools::netbsd::Linker(*this); }
405
GetDefaultCXXStdlibType() const406 ToolChain::CXXStdlibType NetBSD::GetDefaultCXXStdlibType() const {
407 unsigned Major, Minor, Micro;
408 getTriple().getOSVersion(Major, Minor, Micro);
409 if (Major >= 7 || Major == 0) {
410 switch (getArch()) {
411 case llvm::Triple::aarch64:
412 case llvm::Triple::aarch64_be:
413 case llvm::Triple::arm:
414 case llvm::Triple::armeb:
415 case llvm::Triple::thumb:
416 case llvm::Triple::thumbeb:
417 case llvm::Triple::ppc:
418 case llvm::Triple::ppc64:
419 case llvm::Triple::ppc64le:
420 case llvm::Triple::sparc:
421 case llvm::Triple::sparcv9:
422 case llvm::Triple::x86:
423 case llvm::Triple::x86_64:
424 return ToolChain::CST_Libcxx;
425 default:
426 break;
427 }
428 }
429 return ToolChain::CST_Libstdcxx;
430 }
431
addLibCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const432 void NetBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
433 llvm::opt::ArgStringList &CC1Args) const {
434 const std::string Candidates[] = {
435 // directory relative to build tree
436 getDriver().Dir + "/../include/c++/v1",
437 // system install with full upstream path
438 getDriver().SysRoot + "/usr/include/c++/v1",
439 // system install from src
440 getDriver().SysRoot + "/usr/include/c++",
441 };
442
443 for (const auto &IncludePath : Candidates) {
444 if (!getVFS().exists(IncludePath + "/__config"))
445 continue;
446
447 // Use the first candidate that looks valid.
448 addSystemInclude(DriverArgs, CC1Args, IncludePath);
449 return;
450 }
451 }
452
addLibStdCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const453 void NetBSD::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
454 llvm::opt::ArgStringList &CC1Args) const {
455 addLibStdCXXIncludePaths(getDriver().SysRoot + "/usr/include/g++", "", "",
456 DriverArgs, CC1Args);
457 }
458
GetExceptionModel(const ArgList & Args) const459 llvm::ExceptionHandling NetBSD::GetExceptionModel(const ArgList &Args) const {
460 // NetBSD uses Dwarf exceptions on ARM.
461 llvm::Triple::ArchType TArch = getTriple().getArch();
462 if (TArch == llvm::Triple::arm || TArch == llvm::Triple::armeb ||
463 TArch == llvm::Triple::thumb || TArch == llvm::Triple::thumbeb)
464 return llvm::ExceptionHandling::DwarfCFI;
465 return llvm::ExceptionHandling::None;
466 }
467
getSupportedSanitizers() const468 SanitizerMask NetBSD::getSupportedSanitizers() const {
469 const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
470 const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
471 SanitizerMask Res = ToolChain::getSupportedSanitizers();
472 if (IsX86 || IsX86_64) {
473 Res |= SanitizerKind::Address;
474 Res |= SanitizerKind::PointerCompare;
475 Res |= SanitizerKind::PointerSubtract;
476 Res |= SanitizerKind::Function;
477 Res |= SanitizerKind::Leak;
478 Res |= SanitizerKind::SafeStack;
479 Res |= SanitizerKind::Scudo;
480 Res |= SanitizerKind::Vptr;
481 }
482 if (IsX86_64) {
483 Res |= SanitizerKind::DataFlow;
484 Res |= SanitizerKind::Fuzzer;
485 Res |= SanitizerKind::FuzzerNoLink;
486 Res |= SanitizerKind::HWAddress;
487 Res |= SanitizerKind::KernelAddress;
488 Res |= SanitizerKind::KernelHWAddress;
489 Res |= SanitizerKind::KernelMemory;
490 Res |= SanitizerKind::Memory;
491 Res |= SanitizerKind::Thread;
492 }
493 return Res;
494 }
495
addClangTargetOptions(const ArgList & DriverArgs,ArgStringList & CC1Args,Action::OffloadKind) const496 void NetBSD::addClangTargetOptions(const ArgList &DriverArgs,
497 ArgStringList &CC1Args,
498 Action::OffloadKind) const {
499 const SanitizerArgs &SanArgs = getSanitizerArgs();
500 if (SanArgs.hasAnySanitizer())
501 CC1Args.push_back("-D_REENTRANT");
502
503 unsigned Major, Minor, Micro;
504 getTriple().getOSVersion(Major, Minor, Micro);
505 bool UseInitArrayDefault =
506 Major >= 9 || Major == 0 ||
507 getTriple().getArch() == llvm::Triple::aarch64 ||
508 getTriple().getArch() == llvm::Triple::aarch64_be ||
509 getTriple().getArch() == llvm::Triple::arm ||
510 getTriple().getArch() == llvm::Triple::armeb;
511
512 if (!DriverArgs.hasFlag(options::OPT_fuse_init_array,
513 options::OPT_fno_use_init_array, UseInitArrayDefault))
514 CC1Args.push_back("-fno-use-init-array");
515 }
516