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   } else {
126     if (Args.hasArg(options::OPT_rdynamic))
127       CmdArgs.push_back("-export-dynamic");
128     if (Args.hasArg(options::OPT_shared)) {
129       CmdArgs.push_back("-Bshareable");
130     } else {
131       Args.AddAllArgs(CmdArgs, options::OPT_pie);
132       CmdArgs.push_back("-dynamic-linker");
133       CmdArgs.push_back("/libexec/ld.elf_so");
134     }
135   }
136 
137   // Many NetBSD architectures support more than one ABI.
138   // Determine the correct emulation for ld.
139   switch (ToolChain.getArch()) {
140   case llvm::Triple::x86:
141     CmdArgs.push_back("-m");
142     CmdArgs.push_back("elf_i386");
143     break;
144   case llvm::Triple::arm:
145   case llvm::Triple::thumb:
146     CmdArgs.push_back("-m");
147     switch (ToolChain.getTriple().getEnvironment()) {
148     case llvm::Triple::EABI:
149     case llvm::Triple::GNUEABI:
150       CmdArgs.push_back("armelf_nbsd_eabi");
151       break;
152     case llvm::Triple::EABIHF:
153     case llvm::Triple::GNUEABIHF:
154       CmdArgs.push_back("armelf_nbsd_eabihf");
155       break;
156     default:
157       CmdArgs.push_back("armelf_nbsd");
158       break;
159     }
160     break;
161   case llvm::Triple::armeb:
162   case llvm::Triple::thumbeb:
163     arm::appendEBLinkFlags(Args, CmdArgs, ToolChain.getEffectiveTriple());
164     CmdArgs.push_back("-m");
165     switch (ToolChain.getTriple().getEnvironment()) {
166     case llvm::Triple::EABI:
167     case llvm::Triple::GNUEABI:
168       CmdArgs.push_back("armelfb_nbsd_eabi");
169       break;
170     case llvm::Triple::EABIHF:
171     case llvm::Triple::GNUEABIHF:
172       CmdArgs.push_back("armelfb_nbsd_eabihf");
173       break;
174     default:
175       CmdArgs.push_back("armelfb_nbsd");
176       break;
177     }
178     break;
179   case llvm::Triple::mips64:
180   case llvm::Triple::mips64el:
181     if (mips::hasMipsAbiArg(Args, "32")) {
182       CmdArgs.push_back("-m");
183       if (ToolChain.getArch() == llvm::Triple::mips64)
184         CmdArgs.push_back("elf32btsmip");
185       else
186         CmdArgs.push_back("elf32ltsmip");
187     } else if (mips::hasMipsAbiArg(Args, "64")) {
188       CmdArgs.push_back("-m");
189       if (ToolChain.getArch() == llvm::Triple::mips64)
190         CmdArgs.push_back("elf64btsmip");
191       else
192         CmdArgs.push_back("elf64ltsmip");
193     }
194     break;
195   case llvm::Triple::ppc:
196     CmdArgs.push_back("-m");
197     CmdArgs.push_back("elf32ppc_nbsd");
198     break;
199 
200   case llvm::Triple::ppc64:
201   case llvm::Triple::ppc64le:
202     CmdArgs.push_back("-m");
203     CmdArgs.push_back("elf64ppc");
204     break;
205 
206   case llvm::Triple::sparc:
207     CmdArgs.push_back("-m");
208     CmdArgs.push_back("elf32_sparc");
209     break;
210 
211   case llvm::Triple::sparcv9:
212     CmdArgs.push_back("-m");
213     CmdArgs.push_back("elf64_sparc");
214     break;
215 
216   default:
217     break;
218   }
219 
220   if (Output.isFilename()) {
221     CmdArgs.push_back("-o");
222     CmdArgs.push_back(Output.getFilename());
223   } else {
224     assert(Output.isNothing() && "Invalid output.");
225   }
226 
227   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
228     if (!Args.hasArg(options::OPT_shared)) {
229       CmdArgs.push_back(
230           Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
231     }
232     CmdArgs.push_back(
233         Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
234     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie)) {
235       CmdArgs.push_back(
236           Args.MakeArgString(ToolChain.GetFilePath("crtbeginS.o")));
237     } else {
238       CmdArgs.push_back(
239           Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
240     }
241   }
242 
243   Args.AddAllArgs(CmdArgs, options::OPT_L);
244   Args.AddAllArgs(CmdArgs, options::OPT_T_Group);
245   Args.AddAllArgs(CmdArgs, options::OPT_e);
246   Args.AddAllArgs(CmdArgs, options::OPT_s);
247   Args.AddAllArgs(CmdArgs, options::OPT_t);
248   Args.AddAllArgs(CmdArgs, options::OPT_Z_Flag);
249   Args.AddAllArgs(CmdArgs, options::OPT_r);
250 
251   bool NeedsSanitizerDeps = addSanitizerRuntimes(getToolChain(), Args, CmdArgs);
252   bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
253   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
254 
255   unsigned Major, Minor, Micro;
256   ToolChain.getTriple().getOSVersion(Major, Minor, Micro);
257   bool useLibgcc = true;
258   if (Major >= 7 || Major == 0) {
259     switch (ToolChain.getArch()) {
260     case llvm::Triple::aarch64:
261     case llvm::Triple::aarch64_be:
262     case llvm::Triple::arm:
263     case llvm::Triple::armeb:
264     case llvm::Triple::thumb:
265     case llvm::Triple::thumbeb:
266     case llvm::Triple::ppc:
267     case llvm::Triple::ppc64:
268     case llvm::Triple::ppc64le:
269     case llvm::Triple::sparc:
270     case llvm::Triple::sparcv9:
271     case llvm::Triple::x86:
272     case llvm::Triple::x86_64:
273       useLibgcc = false;
274       break;
275     default:
276       break;
277     }
278   }
279 
280   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
281     addOpenMPRuntime(CmdArgs, getToolChain(), Args);
282     if (D.CCCIsCXX()) {
283       if (ToolChain.ShouldLinkCXXStdlib(Args))
284         ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
285       CmdArgs.push_back("-lm");
286     }
287     if (NeedsSanitizerDeps)
288       linkSanitizerRuntimeDeps(getToolChain(), CmdArgs);
289     if (NeedsXRayDeps)
290       linkXRayRuntimeDeps(ToolChain, CmdArgs);
291     if (Args.hasArg(options::OPT_pthread))
292       CmdArgs.push_back("-lpthread");
293     CmdArgs.push_back("-lc");
294 
295     if (useLibgcc) {
296       if (Args.hasArg(options::OPT_static)) {
297         // libgcc_eh depends on libc, so resolve as much as possible,
298         // pull in any new requirements from libc and then get the rest
299         // of libgcc.
300         CmdArgs.push_back("-lgcc_eh");
301         CmdArgs.push_back("-lc");
302         CmdArgs.push_back("-lgcc");
303       } else {
304         CmdArgs.push_back("-lgcc");
305         CmdArgs.push_back("--as-needed");
306         CmdArgs.push_back("-lgcc_s");
307         CmdArgs.push_back("--no-as-needed");
308       }
309     }
310   }
311 
312   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
313     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie))
314       CmdArgs.push_back(
315           Args.MakeArgString(ToolChain.GetFilePath("crtendS.o")));
316     else
317       CmdArgs.push_back(
318           Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
319     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
320   }
321 
322   ToolChain.addProfileRTLibs(Args, CmdArgs);
323 
324   const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
325   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
326 }
327 
328 /// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
329 
330 NetBSD::NetBSD(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
331     : Generic_ELF(D, Triple, Args) {
332   if (!Args.hasArg(options::OPT_nostdlib)) {
333     // When targeting a 32-bit platform, try the special directory used on
334     // 64-bit hosts, and only fall back to the main library directory if that
335     // doesn't work.
336     // FIXME: It'd be nicer to test if this directory exists, but I'm not sure
337     // what all logic is needed to emulate the '=' prefix here.
338     switch (Triple.getArch()) {
339     case llvm::Triple::x86:
340       getFilePaths().push_back("=/usr/lib/i386");
341       break;
342     case llvm::Triple::arm:
343     case llvm::Triple::armeb:
344     case llvm::Triple::thumb:
345     case llvm::Triple::thumbeb:
346       switch (Triple.getEnvironment()) {
347       case llvm::Triple::EABI:
348       case llvm::Triple::GNUEABI:
349         getFilePaths().push_back("=/usr/lib/eabi");
350         break;
351       case llvm::Triple::EABIHF:
352       case llvm::Triple::GNUEABIHF:
353         getFilePaths().push_back("=/usr/lib/eabihf");
354         break;
355       default:
356         getFilePaths().push_back("=/usr/lib/oabi");
357         break;
358       }
359       break;
360     case llvm::Triple::mips64:
361     case llvm::Triple::mips64el:
362       if (tools::mips::hasMipsAbiArg(Args, "o32"))
363         getFilePaths().push_back("=/usr/lib/o32");
364       else if (tools::mips::hasMipsAbiArg(Args, "64"))
365         getFilePaths().push_back("=/usr/lib/64");
366       break;
367     case llvm::Triple::ppc:
368       getFilePaths().push_back("=/usr/lib/powerpc");
369       break;
370     case llvm::Triple::sparc:
371       getFilePaths().push_back("=/usr/lib/sparc");
372       break;
373     default:
374       break;
375     }
376 
377     getFilePaths().push_back("=/usr/lib");
378   }
379 }
380 
381 Tool *NetBSD::buildAssembler() const {
382   return new tools::netbsd::Assembler(*this);
383 }
384 
385 Tool *NetBSD::buildLinker() const { return new tools::netbsd::Linker(*this); }
386 
387 ToolChain::CXXStdlibType NetBSD::GetDefaultCXXStdlibType() const {
388   unsigned Major, Minor, Micro;
389   getTriple().getOSVersion(Major, Minor, Micro);
390   if (Major >= 7 || Major == 0) {
391     switch (getArch()) {
392     case llvm::Triple::aarch64:
393     case llvm::Triple::aarch64_be:
394     case llvm::Triple::arm:
395     case llvm::Triple::armeb:
396     case llvm::Triple::thumb:
397     case llvm::Triple::thumbeb:
398     case llvm::Triple::ppc:
399     case llvm::Triple::ppc64:
400     case llvm::Triple::ppc64le:
401     case llvm::Triple::sparc:
402     case llvm::Triple::sparcv9:
403     case llvm::Triple::x86:
404     case llvm::Triple::x86_64:
405       return ToolChain::CST_Libcxx;
406     default:
407       break;
408     }
409   }
410   return ToolChain::CST_Libstdcxx;
411 }
412 
413 void NetBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
414                                    llvm::opt::ArgStringList &CC1Args) const {
415   addSystemInclude(DriverArgs, CC1Args,
416                    getDriver().SysRoot + "/usr/include/c++/");
417 }
418 
419 void NetBSD::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
420                                       llvm::opt::ArgStringList &CC1Args) const {
421   addLibStdCXXIncludePaths(getDriver().SysRoot, "/usr/include/g++", "", "", "",
422                            "", DriverArgs, CC1Args);
423 }
424 
425 llvm::ExceptionHandling NetBSD::GetExceptionModel(const ArgList &Args) const {
426   // NetBSD uses Dwarf exceptions on ARM.
427   llvm::Triple::ArchType TArch = getTriple().getArch();
428   if (TArch == llvm::Triple::arm || TArch == llvm::Triple::armeb ||
429       TArch == llvm::Triple::thumb || TArch == llvm::Triple::thumbeb)
430     return llvm::ExceptionHandling::DwarfCFI;
431   return llvm::ExceptionHandling::None;
432 }
433 
434 SanitizerMask NetBSD::getSupportedSanitizers() const {
435   const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
436   const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
437   SanitizerMask Res = ToolChain::getSupportedSanitizers();
438   if (IsX86 || IsX86_64) {
439     Res |= SanitizerKind::Address;
440     Res |= SanitizerKind::Function;
441     Res |= SanitizerKind::Leak;
442     Res |= SanitizerKind::SafeStack;
443     Res |= SanitizerKind::Scudo;
444     Res |= SanitizerKind::Vptr;
445   }
446   if (IsX86_64) {
447     Res |= SanitizerKind::Efficiency;
448     Res |= SanitizerKind::Fuzzer;
449     Res |= SanitizerKind::FuzzerNoLink;
450     Res |= SanitizerKind::KernelAddress;
451     Res |= SanitizerKind::Memory;
452     Res |= SanitizerKind::Thread;
453   }
454   return Res;
455 }
456