1 //===--- NetBSD.cpp - NetBSD ToolChain Implementations ----------*- C++ -*-===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #include "NetBSD.h"
11 #include "Arch/ARM.h"
12 #include "Arch/Mips.h"
13 #include "Arch/Sparc.h"
14 #include "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 
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::appendEBLinkFlags(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   unsigned Major, Minor, Micro;
260   ToolChain.getTriple().getOSVersion(Major, Minor, Micro);
261   bool useLibgcc = true;
262   if (Major >= 7 || Major == 0) {
263     switch (ToolChain.getArch()) {
264     case llvm::Triple::aarch64:
265     case llvm::Triple::aarch64_be:
266     case llvm::Triple::arm:
267     case llvm::Triple::armeb:
268     case llvm::Triple::thumb:
269     case llvm::Triple::thumbeb:
270     case llvm::Triple::ppc:
271     case llvm::Triple::ppc64:
272     case llvm::Triple::ppc64le:
273     case llvm::Triple::sparc:
274     case llvm::Triple::sparcv9:
275     case llvm::Triple::x86:
276     case llvm::Triple::x86_64:
277       useLibgcc = false;
278       break;
279     default:
280       break;
281     }
282   }
283 
284   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
285     addOpenMPRuntime(CmdArgs, getToolChain(), Args);
286     if (D.CCCIsCXX()) {
287       if (ToolChain.ShouldLinkCXXStdlib(Args))
288         ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
289       CmdArgs.push_back("-lm");
290     }
291     if (NeedsSanitizerDeps)
292       linkSanitizerRuntimeDeps(getToolChain(), CmdArgs);
293     if (NeedsXRayDeps)
294       linkXRayRuntimeDeps(ToolChain, CmdArgs);
295     if (Args.hasArg(options::OPT_pthread))
296       CmdArgs.push_back("-lpthread");
297     CmdArgs.push_back("-lc");
298 
299     if (useLibgcc) {
300       if (Args.hasArg(options::OPT_static)) {
301         // libgcc_eh depends on libc, so resolve as much as possible,
302         // pull in any new requirements from libc and then get the rest
303         // of libgcc.
304         CmdArgs.push_back("-lgcc_eh");
305         CmdArgs.push_back("-lc");
306         CmdArgs.push_back("-lgcc");
307       } else {
308         CmdArgs.push_back("-lgcc");
309         CmdArgs.push_back("--as-needed");
310         CmdArgs.push_back("-lgcc_s");
311         CmdArgs.push_back("--no-as-needed");
312       }
313     }
314   }
315 
316   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
317     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie))
318       CmdArgs.push_back(
319           Args.MakeArgString(ToolChain.GetFilePath("crtendS.o")));
320     else
321       CmdArgs.push_back(
322           Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
323     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
324   }
325 
326   ToolChain.addProfileRTLibs(Args, CmdArgs);
327 
328   const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
329   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
330 }
331 
332 /// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
333 
334 NetBSD::NetBSD(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
335     : Generic_ELF(D, Triple, Args) {
336   if (!Args.hasArg(options::OPT_nostdlib)) {
337     // When targeting a 32-bit platform, try the special directory used on
338     // 64-bit hosts, and only fall back to the main library directory if that
339     // doesn't work.
340     // FIXME: It'd be nicer to test if this directory exists, but I'm not sure
341     // what all logic is needed to emulate the '=' prefix here.
342     switch (Triple.getArch()) {
343     case llvm::Triple::x86:
344       getFilePaths().push_back("=/usr/lib/i386");
345       break;
346     case llvm::Triple::arm:
347     case llvm::Triple::armeb:
348     case llvm::Triple::thumb:
349     case llvm::Triple::thumbeb:
350       switch (Triple.getEnvironment()) {
351       case llvm::Triple::EABI:
352       case llvm::Triple::GNUEABI:
353         getFilePaths().push_back("=/usr/lib/eabi");
354         break;
355       case llvm::Triple::EABIHF:
356       case llvm::Triple::GNUEABIHF:
357         getFilePaths().push_back("=/usr/lib/eabihf");
358         break;
359       default:
360         getFilePaths().push_back("=/usr/lib/oabi");
361         break;
362       }
363       break;
364     case llvm::Triple::mips64:
365     case llvm::Triple::mips64el:
366       if (tools::mips::hasMipsAbiArg(Args, "o32"))
367         getFilePaths().push_back("=/usr/lib/o32");
368       else if (tools::mips::hasMipsAbiArg(Args, "64"))
369         getFilePaths().push_back("=/usr/lib/64");
370       break;
371     case llvm::Triple::ppc:
372       getFilePaths().push_back("=/usr/lib/powerpc");
373       break;
374     case llvm::Triple::sparc:
375       getFilePaths().push_back("=/usr/lib/sparc");
376       break;
377     default:
378       break;
379     }
380 
381     getFilePaths().push_back("=/usr/lib");
382   }
383 }
384 
385 Tool *NetBSD::buildAssembler() const {
386   return new tools::netbsd::Assembler(*this);
387 }
388 
389 Tool *NetBSD::buildLinker() const { return new tools::netbsd::Linker(*this); }
390 
391 ToolChain::CXXStdlibType NetBSD::GetDefaultCXXStdlibType() const {
392   unsigned Major, Minor, Micro;
393   getTriple().getOSVersion(Major, Minor, Micro);
394   if (Major >= 7 || Major == 0) {
395     switch (getArch()) {
396     case llvm::Triple::aarch64:
397     case llvm::Triple::aarch64_be:
398     case llvm::Triple::arm:
399     case llvm::Triple::armeb:
400     case llvm::Triple::thumb:
401     case llvm::Triple::thumbeb:
402     case llvm::Triple::ppc:
403     case llvm::Triple::ppc64:
404     case llvm::Triple::ppc64le:
405     case llvm::Triple::sparc:
406     case llvm::Triple::sparcv9:
407     case llvm::Triple::x86:
408     case llvm::Triple::x86_64:
409       return ToolChain::CST_Libcxx;
410     default:
411       break;
412     }
413   }
414   return ToolChain::CST_Libstdcxx;
415 }
416 
417 void NetBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
418                                    llvm::opt::ArgStringList &CC1Args) const {
419   addSystemInclude(DriverArgs, CC1Args,
420                    getDriver().SysRoot + "/usr/include/c++/");
421 }
422 
423 void NetBSD::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
424                                       llvm::opt::ArgStringList &CC1Args) const {
425   addLibStdCXXIncludePaths(getDriver().SysRoot, "/usr/include/g++", "", "", "",
426                            "", DriverArgs, CC1Args);
427 }
428 
429 llvm::ExceptionHandling NetBSD::GetExceptionModel(const ArgList &Args) const {
430   // NetBSD uses Dwarf exceptions on ARM.
431   llvm::Triple::ArchType TArch = getTriple().getArch();
432   if (TArch == llvm::Triple::arm || TArch == llvm::Triple::armeb ||
433       TArch == llvm::Triple::thumb || TArch == llvm::Triple::thumbeb)
434     return llvm::ExceptionHandling::DwarfCFI;
435   return llvm::ExceptionHandling::None;
436 }
437 
438 SanitizerMask NetBSD::getSupportedSanitizers() const {
439   const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
440   const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
441   SanitizerMask Res = ToolChain::getSupportedSanitizers();
442   if (IsX86 || IsX86_64) {
443     Res |= SanitizerKind::Address;
444     Res |= SanitizerKind::Function;
445     Res |= SanitizerKind::Leak;
446     Res |= SanitizerKind::SafeStack;
447     Res |= SanitizerKind::Scudo;
448     Res |= SanitizerKind::Vptr;
449   }
450   if (IsX86_64) {
451     Res |= SanitizerKind::Efficiency;
452     Res |= SanitizerKind::Fuzzer;
453     Res |= SanitizerKind::FuzzerNoLink;
454     Res |= SanitizerKind::KernelAddress;
455     Res |= SanitizerKind::Memory;
456     Res |= SanitizerKind::Thread;
457   }
458   return Res;
459 }
460