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().getArch() == llvm::Triple::mips ||
68         getToolChain().getArch() == llvm::Triple::mips64)
69       CmdArgs.push_back("-EB");
70     else
71       CmdArgs.push_back("-EL");
72 
73     AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
74     break;
75   }
76 
77   case llvm::Triple::sparc:
78   case llvm::Triple::sparcel: {
79     CmdArgs.push_back("-32");
80     std::string CPU = getCPUName(Args, getToolChain().getTriple());
81     CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
82     AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
83     break;
84   }
85 
86   case llvm::Triple::sparcv9: {
87     CmdArgs.push_back("-64");
88     std::string CPU = getCPUName(Args, getToolChain().getTriple());
89     CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
90     AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
91     break;
92   }
93 
94   default:
95     break;
96   }
97 
98   Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
99 
100   CmdArgs.push_back("-o");
101   CmdArgs.push_back(Output.getFilename());
102 
103   for (const auto &II : Inputs)
104     CmdArgs.push_back(II.getFilename());
105 
106   const char *Exec = Args.MakeArgString((getToolChain().GetProgramPath("as")));
107   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
108 }
109 
110 void netbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
111                                   const InputInfo &Output,
112                                   const InputInfoList &Inputs,
113                                   const ArgList &Args,
114                                   const char *LinkingOutput) const {
115   const toolchains::NetBSD &ToolChain =
116     static_cast<const toolchains::NetBSD &>(getToolChain());
117   const Driver &D = ToolChain.getDriver();
118   ArgStringList CmdArgs;
119 
120   if (!D.SysRoot.empty())
121     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
122 
123   CmdArgs.push_back("--eh-frame-hdr");
124   if (Args.hasArg(options::OPT_static)) {
125     CmdArgs.push_back("-Bstatic");
126   } else {
127     if (Args.hasArg(options::OPT_rdynamic))
128       CmdArgs.push_back("-export-dynamic");
129     if (Args.hasArg(options::OPT_shared)) {
130       CmdArgs.push_back("-Bshareable");
131     } else {
132       Args.AddAllArgs(CmdArgs, options::OPT_pie);
133       CmdArgs.push_back("-dynamic-linker");
134       CmdArgs.push_back("/libexec/ld.elf_so");
135     }
136   }
137 
138   // Many NetBSD architectures support more than one ABI.
139   // Determine the correct emulation for ld.
140   switch (ToolChain.getArch()) {
141   case llvm::Triple::x86:
142     CmdArgs.push_back("-m");
143     CmdArgs.push_back("elf_i386");
144     break;
145   case llvm::Triple::arm:
146   case llvm::Triple::thumb:
147     CmdArgs.push_back("-m");
148     switch (ToolChain.getTriple().getEnvironment()) {
149     case llvm::Triple::EABI:
150     case llvm::Triple::GNUEABI:
151       CmdArgs.push_back("armelf_nbsd_eabi");
152       break;
153     case llvm::Triple::EABIHF:
154     case llvm::Triple::GNUEABIHF:
155       CmdArgs.push_back("armelf_nbsd_eabihf");
156       break;
157     default:
158       CmdArgs.push_back("armelf_nbsd");
159       break;
160     }
161     break;
162   case llvm::Triple::armeb:
163   case llvm::Triple::thumbeb:
164     arm::appendEBLinkFlags(Args, CmdArgs, ToolChain.getEffectiveTriple());
165     CmdArgs.push_back("-m");
166     switch (ToolChain.getTriple().getEnvironment()) {
167     case llvm::Triple::EABI:
168     case llvm::Triple::GNUEABI:
169       CmdArgs.push_back("armelfb_nbsd_eabi");
170       break;
171     case llvm::Triple::EABIHF:
172     case llvm::Triple::GNUEABIHF:
173       CmdArgs.push_back("armelfb_nbsd_eabihf");
174       break;
175     default:
176       CmdArgs.push_back("armelfb_nbsd");
177       break;
178     }
179     break;
180   case llvm::Triple::mips64:
181   case llvm::Triple::mips64el:
182     if (mips::hasMipsAbiArg(Args, "32")) {
183       CmdArgs.push_back("-m");
184       if (ToolChain.getArch() == llvm::Triple::mips64)
185         CmdArgs.push_back("elf32btsmip");
186       else
187         CmdArgs.push_back("elf32ltsmip");
188     } else if (mips::hasMipsAbiArg(Args, "64")) {
189       CmdArgs.push_back("-m");
190       if (ToolChain.getArch() == llvm::Triple::mips64)
191         CmdArgs.push_back("elf64btsmip");
192       else
193         CmdArgs.push_back("elf64ltsmip");
194     }
195     break;
196   case llvm::Triple::ppc:
197     CmdArgs.push_back("-m");
198     CmdArgs.push_back("elf32ppc_nbsd");
199     break;
200 
201   case llvm::Triple::ppc64:
202   case llvm::Triple::ppc64le:
203     CmdArgs.push_back("-m");
204     CmdArgs.push_back("elf64ppc");
205     break;
206 
207   case llvm::Triple::sparc:
208     CmdArgs.push_back("-m");
209     CmdArgs.push_back("elf32_sparc");
210     break;
211 
212   case llvm::Triple::sparcv9:
213     CmdArgs.push_back("-m");
214     CmdArgs.push_back("elf64_sparc");
215     break;
216 
217   default:
218     break;
219   }
220 
221   if (Output.isFilename()) {
222     CmdArgs.push_back("-o");
223     CmdArgs.push_back(Output.getFilename());
224   } else {
225     assert(Output.isNothing() && "Invalid output.");
226   }
227 
228   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
229     if (!Args.hasArg(options::OPT_shared)) {
230       CmdArgs.push_back(
231           Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
232     }
233     CmdArgs.push_back(
234         Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
235     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie)) {
236       CmdArgs.push_back(
237           Args.MakeArgString(ToolChain.GetFilePath("crtbeginS.o")));
238     } else {
239       CmdArgs.push_back(
240           Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
241     }
242   }
243 
244   Args.AddAllArgs(CmdArgs, options::OPT_L);
245   Args.AddAllArgs(CmdArgs, options::OPT_T_Group);
246   Args.AddAllArgs(CmdArgs, options::OPT_e);
247   Args.AddAllArgs(CmdArgs, options::OPT_s);
248   Args.AddAllArgs(CmdArgs, options::OPT_t);
249   Args.AddAllArgs(CmdArgs, options::OPT_Z_Flag);
250   Args.AddAllArgs(CmdArgs, options::OPT_r);
251 
252   bool NeedsSanitizerDeps = addSanitizerRuntimes(getToolChain(), Args, CmdArgs);
253   bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
254   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
255 
256   unsigned Major, Minor, Micro;
257   ToolChain.getTriple().getOSVersion(Major, Minor, Micro);
258   bool useLibgcc = true;
259   if (Major >= 7 || Major == 0) {
260     switch (ToolChain.getArch()) {
261     case llvm::Triple::aarch64:
262     case llvm::Triple::aarch64_be:
263     case llvm::Triple::arm:
264     case llvm::Triple::armeb:
265     case llvm::Triple::thumb:
266     case llvm::Triple::thumbeb:
267     case llvm::Triple::ppc:
268     case llvm::Triple::ppc64:
269     case llvm::Triple::ppc64le:
270     case llvm::Triple::sparc:
271     case llvm::Triple::sparcv9:
272     case llvm::Triple::x86:
273     case llvm::Triple::x86_64:
274       useLibgcc = false;
275       break;
276     default:
277       break;
278     }
279   }
280 
281   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
282     addOpenMPRuntime(CmdArgs, getToolChain(), Args);
283     if (D.CCCIsCXX()) {
284       if (ToolChain.ShouldLinkCXXStdlib(Args))
285         ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
286       CmdArgs.push_back("-lm");
287     }
288     if (NeedsSanitizerDeps)
289       linkSanitizerRuntimeDeps(getToolChain(), CmdArgs);
290     if (NeedsXRayDeps)
291       linkXRayRuntimeDeps(ToolChain, CmdArgs);
292     if (Args.hasArg(options::OPT_pthread))
293       CmdArgs.push_back("-lpthread");
294     CmdArgs.push_back("-lc");
295 
296     if (useLibgcc) {
297       if (Args.hasArg(options::OPT_static)) {
298         // libgcc_eh depends on libc, so resolve as much as possible,
299         // pull in any new requirements from libc and then get the rest
300         // of libgcc.
301         CmdArgs.push_back("-lgcc_eh");
302         CmdArgs.push_back("-lc");
303         CmdArgs.push_back("-lgcc");
304       } else {
305         CmdArgs.push_back("-lgcc");
306         CmdArgs.push_back("--as-needed");
307         CmdArgs.push_back("-lgcc_s");
308         CmdArgs.push_back("--no-as-needed");
309       }
310     }
311   }
312 
313   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
314     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie))
315       CmdArgs.push_back(
316           Args.MakeArgString(ToolChain.GetFilePath("crtendS.o")));
317     else
318       CmdArgs.push_back(
319           Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
320     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
321   }
322 
323   ToolChain.addProfileRTLibs(Args, CmdArgs);
324 
325   const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
326   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
327 }
328 
329 /// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
330 
331 NetBSD::NetBSD(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
332     : Generic_ELF(D, Triple, Args) {
333   if (!Args.hasArg(options::OPT_nostdlib)) {
334     // When targeting a 32-bit platform, try the special directory used on
335     // 64-bit hosts, and only fall back to the main library directory if that
336     // doesn't work.
337     // FIXME: It'd be nicer to test if this directory exists, but I'm not sure
338     // what all logic is needed to emulate the '=' prefix here.
339     switch (Triple.getArch()) {
340     case llvm::Triple::x86:
341       getFilePaths().push_back("=/usr/lib/i386");
342       break;
343     case llvm::Triple::arm:
344     case llvm::Triple::armeb:
345     case llvm::Triple::thumb:
346     case llvm::Triple::thumbeb:
347       switch (Triple.getEnvironment()) {
348       case llvm::Triple::EABI:
349       case llvm::Triple::GNUEABI:
350         getFilePaths().push_back("=/usr/lib/eabi");
351         break;
352       case llvm::Triple::EABIHF:
353       case llvm::Triple::GNUEABIHF:
354         getFilePaths().push_back("=/usr/lib/eabihf");
355         break;
356       default:
357         getFilePaths().push_back("=/usr/lib/oabi");
358         break;
359       }
360       break;
361     case llvm::Triple::mips64:
362     case llvm::Triple::mips64el:
363       if (tools::mips::hasMipsAbiArg(Args, "o32"))
364         getFilePaths().push_back("=/usr/lib/o32");
365       else if (tools::mips::hasMipsAbiArg(Args, "64"))
366         getFilePaths().push_back("=/usr/lib/64");
367       break;
368     case llvm::Triple::ppc:
369       getFilePaths().push_back("=/usr/lib/powerpc");
370       break;
371     case llvm::Triple::sparc:
372       getFilePaths().push_back("=/usr/lib/sparc");
373       break;
374     default:
375       break;
376     }
377 
378     getFilePaths().push_back("=/usr/lib");
379   }
380 }
381 
382 Tool *NetBSD::buildAssembler() const {
383   return new tools::netbsd::Assembler(*this);
384 }
385 
386 Tool *NetBSD::buildLinker() const { return new tools::netbsd::Linker(*this); }
387 
388 ToolChain::CXXStdlibType NetBSD::GetDefaultCXXStdlibType() const {
389   unsigned Major, Minor, Micro;
390   getTriple().getOSVersion(Major, Minor, Micro);
391   if (Major >= 7 || Major == 0) {
392     switch (getArch()) {
393     case llvm::Triple::aarch64:
394     case llvm::Triple::aarch64_be:
395     case llvm::Triple::arm:
396     case llvm::Triple::armeb:
397     case llvm::Triple::thumb:
398     case llvm::Triple::thumbeb:
399     case llvm::Triple::ppc:
400     case llvm::Triple::ppc64:
401     case llvm::Triple::ppc64le:
402     case llvm::Triple::sparc:
403     case llvm::Triple::sparcv9:
404     case llvm::Triple::x86:
405     case llvm::Triple::x86_64:
406       return ToolChain::CST_Libcxx;
407     default:
408       break;
409     }
410   }
411   return ToolChain::CST_Libstdcxx;
412 }
413 
414 void NetBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
415                                    llvm::opt::ArgStringList &CC1Args) const {
416   addSystemInclude(DriverArgs, CC1Args,
417                    getDriver().SysRoot + "/usr/include/c++/");
418 }
419 
420 void NetBSD::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
421                                       llvm::opt::ArgStringList &CC1Args) const {
422   addLibStdCXXIncludePaths(getDriver().SysRoot, "/usr/include/g++", "", "", "",
423                            "", DriverArgs, CC1Args);
424 }
425 
426 llvm::ExceptionHandling NetBSD::GetExceptionModel(const ArgList &Args) const {
427   // NetBSD uses Dwarf exceptions on ARM.
428   llvm::Triple::ArchType TArch = getTriple().getArch();
429   if (TArch == llvm::Triple::arm || TArch == llvm::Triple::armeb ||
430       TArch == llvm::Triple::thumb || TArch == llvm::Triple::thumbeb)
431     return llvm::ExceptionHandling::DwarfCFI;
432   return llvm::ExceptionHandling::None;
433 }
434 
435 SanitizerMask NetBSD::getSupportedSanitizers() const {
436   const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
437   const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
438   SanitizerMask Res = ToolChain::getSupportedSanitizers();
439   if (IsX86 || IsX86_64) {
440     Res |= SanitizerKind::Address;
441     Res |= SanitizerKind::Function;
442     Res |= SanitizerKind::Leak;
443     Res |= SanitizerKind::SafeStack;
444     Res |= SanitizerKind::Scudo;
445     Res |= SanitizerKind::Vptr;
446   }
447   if (IsX86_64) {
448     Res |= SanitizerKind::Efficiency;
449     Res |= SanitizerKind::Fuzzer;
450     Res |= SanitizerKind::FuzzerNoLink;
451     Res |= SanitizerKind::KernelAddress;
452     Res |= SanitizerKind::Memory;
453     Res |= SanitizerKind::Thread;
454   }
455   return Res;
456 }
457