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 "llvm/Option/ArgList.h"
19 
20 using namespace clang::driver;
21 using namespace clang::driver::tools;
22 using namespace clang::driver::toolchains;
23 using namespace clang;
24 using namespace llvm::opt;
25 
26 void netbsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
27                                      const InputInfo &Output,
28                                      const InputInfoList &Inputs,
29                                      const ArgList &Args,
30                                      const char *LinkingOutput) const {
31   claimNoWarnArgs(Args);
32   ArgStringList CmdArgs;
33 
34   // GNU as needs different flags for creating the correct output format
35   // on architectures with different ABIs or optional feature sets.
36   switch (getToolChain().getArch()) {
37   case llvm::Triple::x86:
38     CmdArgs.push_back("--32");
39     break;
40   case llvm::Triple::arm:
41   case llvm::Triple::armeb:
42   case llvm::Triple::thumb:
43   case llvm::Triple::thumbeb: {
44     StringRef MArch, MCPU;
45     arm::getARMArchCPUFromArgs(Args, MArch, MCPU, /*FromAs*/ true);
46     std::string Arch =
47         arm::getARMTargetCPU(MCPU, MArch, getToolChain().getTriple());
48     CmdArgs.push_back(Args.MakeArgString("-mcpu=" + Arch));
49     break;
50   }
51 
52   case llvm::Triple::mips:
53   case llvm::Triple::mipsel:
54   case llvm::Triple::mips64:
55   case llvm::Triple::mips64el: {
56     StringRef CPUName;
57     StringRef ABIName;
58     mips::getMipsCPUAndABI(Args, getToolChain().getTriple(), CPUName, ABIName);
59 
60     CmdArgs.push_back("-march");
61     CmdArgs.push_back(CPUName.data());
62 
63     CmdArgs.push_back("-mabi");
64     CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data());
65 
66     if (getToolChain().getArch() == llvm::Triple::mips ||
67         getToolChain().getArch() == llvm::Triple::mips64)
68       CmdArgs.push_back("-EB");
69     else
70       CmdArgs.push_back("-EL");
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 Driver &D = getToolChain().getDriver();
115   ArgStringList CmdArgs;
116 
117   if (!D.SysRoot.empty())
118     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
119 
120   CmdArgs.push_back("--eh-frame-hdr");
121   if (Args.hasArg(options::OPT_static)) {
122     CmdArgs.push_back("-Bstatic");
123   } else {
124     if (Args.hasArg(options::OPT_rdynamic))
125       CmdArgs.push_back("-export-dynamic");
126     if (Args.hasArg(options::OPT_shared)) {
127       CmdArgs.push_back("-Bshareable");
128     } else {
129       Args.AddAllArgs(CmdArgs, options::OPT_pie);
130       CmdArgs.push_back("-dynamic-linker");
131       CmdArgs.push_back("/libexec/ld.elf_so");
132     }
133   }
134 
135   // Many NetBSD architectures support more than one ABI.
136   // Determine the correct emulation for ld.
137   switch (getToolChain().getArch()) {
138   case llvm::Triple::x86:
139     CmdArgs.push_back("-m");
140     CmdArgs.push_back("elf_i386");
141     break;
142   case llvm::Triple::arm:
143   case llvm::Triple::thumb:
144     CmdArgs.push_back("-m");
145     switch (getToolChain().getTriple().getEnvironment()) {
146     case llvm::Triple::EABI:
147     case llvm::Triple::GNUEABI:
148       CmdArgs.push_back("armelf_nbsd_eabi");
149       break;
150     case llvm::Triple::EABIHF:
151     case llvm::Triple::GNUEABIHF:
152       CmdArgs.push_back("armelf_nbsd_eabihf");
153       break;
154     default:
155       CmdArgs.push_back("armelf_nbsd");
156       break;
157     }
158     break;
159   case llvm::Triple::armeb:
160   case llvm::Triple::thumbeb:
161     arm::appendEBLinkFlags(Args, CmdArgs, getToolChain().getEffectiveTriple());
162     CmdArgs.push_back("-m");
163     switch (getToolChain().getTriple().getEnvironment()) {
164     case llvm::Triple::EABI:
165     case llvm::Triple::GNUEABI:
166       CmdArgs.push_back("armelfb_nbsd_eabi");
167       break;
168     case llvm::Triple::EABIHF:
169     case llvm::Triple::GNUEABIHF:
170       CmdArgs.push_back("armelfb_nbsd_eabihf");
171       break;
172     default:
173       CmdArgs.push_back("armelfb_nbsd");
174       break;
175     }
176     break;
177   case llvm::Triple::mips64:
178   case llvm::Triple::mips64el:
179     if (mips::hasMipsAbiArg(Args, "32")) {
180       CmdArgs.push_back("-m");
181       if (getToolChain().getArch() == llvm::Triple::mips64)
182         CmdArgs.push_back("elf32btsmip");
183       else
184         CmdArgs.push_back("elf32ltsmip");
185     } else if (mips::hasMipsAbiArg(Args, "64")) {
186       CmdArgs.push_back("-m");
187       if (getToolChain().getArch() == llvm::Triple::mips64)
188         CmdArgs.push_back("elf64btsmip");
189       else
190         CmdArgs.push_back("elf64ltsmip");
191     }
192     break;
193   case llvm::Triple::ppc:
194     CmdArgs.push_back("-m");
195     CmdArgs.push_back("elf32ppc_nbsd");
196     break;
197 
198   case llvm::Triple::ppc64:
199   case llvm::Triple::ppc64le:
200     CmdArgs.push_back("-m");
201     CmdArgs.push_back("elf64ppc");
202     break;
203 
204   case llvm::Triple::sparc:
205     CmdArgs.push_back("-m");
206     CmdArgs.push_back("elf32_sparc");
207     break;
208 
209   case llvm::Triple::sparcv9:
210     CmdArgs.push_back("-m");
211     CmdArgs.push_back("elf64_sparc");
212     break;
213 
214   default:
215     break;
216   }
217 
218   if (Output.isFilename()) {
219     CmdArgs.push_back("-o");
220     CmdArgs.push_back(Output.getFilename());
221   } else {
222     assert(Output.isNothing() && "Invalid output.");
223   }
224 
225   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
226     if (!Args.hasArg(options::OPT_shared)) {
227       CmdArgs.push_back(
228           Args.MakeArgString(getToolChain().GetFilePath("crt0.o")));
229     }
230     CmdArgs.push_back(
231         Args.MakeArgString(getToolChain().GetFilePath("crti.o")));
232     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie)) {
233       CmdArgs.push_back(
234           Args.MakeArgString(getToolChain().GetFilePath("crtbeginS.o")));
235     } else {
236       CmdArgs.push_back(
237           Args.MakeArgString(getToolChain().GetFilePath("crtbegin.o")));
238     }
239   }
240 
241   Args.AddAllArgs(CmdArgs, options::OPT_L);
242   Args.AddAllArgs(CmdArgs, options::OPT_T_Group);
243   Args.AddAllArgs(CmdArgs, options::OPT_e);
244   Args.AddAllArgs(CmdArgs, options::OPT_s);
245   Args.AddAllArgs(CmdArgs, options::OPT_t);
246   Args.AddAllArgs(CmdArgs, options::OPT_Z_Flag);
247   Args.AddAllArgs(CmdArgs, options::OPT_r);
248 
249   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
250 
251   unsigned Major, Minor, Micro;
252   getToolChain().getTriple().getOSVersion(Major, Minor, Micro);
253   bool useLibgcc = true;
254   if (Major >= 7 || Major == 0) {
255     switch (getToolChain().getArch()) {
256     case llvm::Triple::aarch64:
257     case llvm::Triple::aarch64_be:
258     case llvm::Triple::arm:
259     case llvm::Triple::armeb:
260     case llvm::Triple::thumb:
261     case llvm::Triple::thumbeb:
262     case llvm::Triple::ppc:
263     case llvm::Triple::ppc64:
264     case llvm::Triple::ppc64le:
265     case llvm::Triple::sparc:
266     case llvm::Triple::sparcv9:
267     case llvm::Triple::x86:
268     case llvm::Triple::x86_64:
269       useLibgcc = false;
270       break;
271     default:
272       break;
273     }
274   }
275 
276   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
277     addOpenMPRuntime(CmdArgs, getToolChain(), Args);
278     if (D.CCCIsCXX()) {
279       getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
280       CmdArgs.push_back("-lm");
281     }
282     if (Args.hasArg(options::OPT_pthread))
283       CmdArgs.push_back("-lpthread");
284     CmdArgs.push_back("-lc");
285 
286     if (useLibgcc) {
287       if (Args.hasArg(options::OPT_static)) {
288         // libgcc_eh depends on libc, so resolve as much as possible,
289         // pull in any new requirements from libc and then get the rest
290         // of libgcc.
291         CmdArgs.push_back("-lgcc_eh");
292         CmdArgs.push_back("-lc");
293         CmdArgs.push_back("-lgcc");
294       } else {
295         CmdArgs.push_back("-lgcc");
296         CmdArgs.push_back("--as-needed");
297         CmdArgs.push_back("-lgcc_s");
298         CmdArgs.push_back("--no-as-needed");
299       }
300     }
301   }
302 
303   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
304     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie))
305       CmdArgs.push_back(
306           Args.MakeArgString(getToolChain().GetFilePath("crtendS.o")));
307     else
308       CmdArgs.push_back(
309           Args.MakeArgString(getToolChain().GetFilePath("crtend.o")));
310     CmdArgs.push_back(Args.MakeArgString(getToolChain().GetFilePath("crtn.o")));
311   }
312 
313   getToolChain().addProfileRTLibs(Args, CmdArgs);
314 
315   const char *Exec = Args.MakeArgString(getToolChain().GetLinkerPath());
316   C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
317 }
318 
319 /// NetBSD - NetBSD tool chain which can call as(1) and ld(1) directly.
320 
321 NetBSD::NetBSD(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
322     : Generic_ELF(D, Triple, Args) {
323   if (getDriver().UseStdLib) {
324     // When targeting a 32-bit platform, try the special directory used on
325     // 64-bit hosts, and only fall back to the main library directory if that
326     // doesn't work.
327     // FIXME: It'd be nicer to test if this directory exists, but I'm not sure
328     // what all logic is needed to emulate the '=' prefix here.
329     switch (Triple.getArch()) {
330     case llvm::Triple::x86:
331       getFilePaths().push_back("=/usr/lib/i386");
332       break;
333     case llvm::Triple::arm:
334     case llvm::Triple::armeb:
335     case llvm::Triple::thumb:
336     case llvm::Triple::thumbeb:
337       switch (Triple.getEnvironment()) {
338       case llvm::Triple::EABI:
339       case llvm::Triple::GNUEABI:
340         getFilePaths().push_back("=/usr/lib/eabi");
341         break;
342       case llvm::Triple::EABIHF:
343       case llvm::Triple::GNUEABIHF:
344         getFilePaths().push_back("=/usr/lib/eabihf");
345         break;
346       default:
347         getFilePaths().push_back("=/usr/lib/oabi");
348         break;
349       }
350       break;
351     case llvm::Triple::mips64:
352     case llvm::Triple::mips64el:
353       if (tools::mips::hasMipsAbiArg(Args, "o32"))
354         getFilePaths().push_back("=/usr/lib/o32");
355       else if (tools::mips::hasMipsAbiArg(Args, "64"))
356         getFilePaths().push_back("=/usr/lib/64");
357       break;
358     case llvm::Triple::ppc:
359       getFilePaths().push_back("=/usr/lib/powerpc");
360       break;
361     case llvm::Triple::sparc:
362       getFilePaths().push_back("=/usr/lib/sparc");
363       break;
364     default:
365       break;
366     }
367 
368     getFilePaths().push_back("=/usr/lib");
369   }
370 }
371 
372 Tool *NetBSD::buildAssembler() const {
373   return new tools::netbsd::Assembler(*this);
374 }
375 
376 Tool *NetBSD::buildLinker() const { return new tools::netbsd::Linker(*this); }
377 
378 ToolChain::CXXStdlibType NetBSD::GetDefaultCXXStdlibType() const {
379   unsigned Major, Minor, Micro;
380   getTriple().getOSVersion(Major, Minor, Micro);
381   if (Major >= 7 || Major == 0) {
382     switch (getArch()) {
383     case llvm::Triple::aarch64:
384     case llvm::Triple::aarch64_be:
385     case llvm::Triple::arm:
386     case llvm::Triple::armeb:
387     case llvm::Triple::thumb:
388     case llvm::Triple::thumbeb:
389     case llvm::Triple::ppc:
390     case llvm::Triple::ppc64:
391     case llvm::Triple::ppc64le:
392     case llvm::Triple::sparc:
393     case llvm::Triple::sparcv9:
394     case llvm::Triple::x86:
395     case llvm::Triple::x86_64:
396       return ToolChain::CST_Libcxx;
397     default:
398       break;
399     }
400   }
401   return ToolChain::CST_Libstdcxx;
402 }
403 
404 std::string NetBSD::findLibCxxIncludePath() const {
405   return getDriver().SysRoot + "/usr/include/c++/";
406 }
407 
408 void NetBSD::addLibStdCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
409                                       llvm::opt::ArgStringList &CC1Args) const {
410   addLibStdCXXIncludePaths(getDriver().SysRoot, "/usr/include/g++", "", "", "",
411                            "", DriverArgs, CC1Args);
412 }
413