1 //===--- OpenBSD.cpp - OpenBSD 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 "OpenBSD.h"
10 #include "Arch/Mips.h"
11 #include "Arch/Sparc.h"
12 #include "CommonArgs.h"
13 #include "clang/Config/config.h"
14 #include "clang/Driver/Compilation.h"
15 #include "clang/Driver/Options.h"
16 #include "clang/Driver/SanitizerArgs.h"
17 #include "llvm/Option/ArgList.h"
18 #include "llvm/Support/Path.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
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const26 void openbsd::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 switch (getToolChain().getArch()) {
35 case llvm::Triple::x86:
36 // When building 32-bit code on OpenBSD/amd64, we have to explicitly
37 // instruct as in the base system to assemble 32-bit code.
38 CmdArgs.push_back("--32");
39 break;
40
41 case llvm::Triple::ppc:
42 CmdArgs.push_back("-mppc");
43 CmdArgs.push_back("-many");
44 break;
45
46 case llvm::Triple::sparcv9: {
47 CmdArgs.push_back("-64");
48 std::string CPU = getCPUName(Args, getToolChain().getTriple());
49 CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
50 AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
51 break;
52 }
53
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("-mabi");
61 CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data());
62
63 if (getToolChain().getTriple().isLittleEndian())
64 CmdArgs.push_back("-EL");
65 else
66 CmdArgs.push_back("-EB");
67
68 AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
69 break;
70 }
71
72 default:
73 break;
74 }
75
76 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
77
78 CmdArgs.push_back("-o");
79 CmdArgs.push_back(Output.getFilename());
80
81 for (const auto &II : Inputs)
82 CmdArgs.push_back(II.getFilename());
83
84 const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
85 C.addCommand(std::make_unique<Command>(JA, *this,
86 ResponseFileSupport::AtFileCurCP(),
87 Exec, CmdArgs, Inputs, Output));
88 }
89
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const90 void openbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
91 const InputInfo &Output,
92 const InputInfoList &Inputs,
93 const ArgList &Args,
94 const char *LinkingOutput) const {
95 const toolchains::OpenBSD &ToolChain =
96 static_cast<const toolchains::OpenBSD &>(getToolChain());
97 const Driver &D = getToolChain().getDriver();
98 ArgStringList CmdArgs;
99
100 // Silence warning for "clang -g foo.o -o foo"
101 Args.ClaimAllArgs(options::OPT_g_Group);
102 // and "clang -emit-llvm foo.o -o foo"
103 Args.ClaimAllArgs(options::OPT_emit_llvm);
104 // and for "clang -w foo.o -o foo". Other warning options are already
105 // handled somewhere else.
106 Args.ClaimAllArgs(options::OPT_w);
107
108 if (ToolChain.getArch() == llvm::Triple::mips64)
109 CmdArgs.push_back("-EB");
110 else if (ToolChain.getArch() == llvm::Triple::mips64el)
111 CmdArgs.push_back("-EL");
112
113 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_shared)) {
114 CmdArgs.push_back("-e");
115 CmdArgs.push_back("__start");
116 }
117
118 CmdArgs.push_back("--eh-frame-hdr");
119 if (Args.hasArg(options::OPT_static)) {
120 CmdArgs.push_back("-Bstatic");
121 } else {
122 if (Args.hasArg(options::OPT_rdynamic))
123 CmdArgs.push_back("-export-dynamic");
124 CmdArgs.push_back("-Bdynamic");
125 if (Args.hasArg(options::OPT_shared)) {
126 CmdArgs.push_back("-shared");
127 } else {
128 CmdArgs.push_back("-dynamic-linker");
129 CmdArgs.push_back("/usr/libexec/ld.so");
130 }
131 }
132
133 if (Args.hasArg(options::OPT_pie))
134 CmdArgs.push_back("-pie");
135 if (Args.hasArg(options::OPT_nopie) || Args.hasArg(options::OPT_pg))
136 CmdArgs.push_back("-nopie");
137
138 if (Output.isFilename()) {
139 CmdArgs.push_back("-o");
140 CmdArgs.push_back(Output.getFilename());
141 } else {
142 assert(Output.isNothing() && "Invalid output.");
143 }
144
145 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
146 const char *crt0 = nullptr;
147 const char *crtbegin = nullptr;
148 if (!Args.hasArg(options::OPT_shared)) {
149 if (Args.hasArg(options::OPT_pg))
150 crt0 = "gcrt0.o";
151 else if (Args.hasArg(options::OPT_static) &&
152 !Args.hasArg(options::OPT_nopie))
153 crt0 = "rcrt0.o";
154 else
155 crt0 = "crt0.o";
156 crtbegin = "crtbegin.o";
157 } else {
158 crtbegin = "crtbeginS.o";
159 }
160
161 if (crt0)
162 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt0)));
163 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
164 }
165
166 Args.AddAllArgs(CmdArgs, options::OPT_L);
167 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
168 Args.AddAllArgs(CmdArgs, {options::OPT_T_Group, options::OPT_e,
169 options::OPT_s, options::OPT_t,
170 options::OPT_Z_Flag, options::OPT_r});
171
172 bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
173 bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
174 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
175
176 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
177 // Use the static OpenMP runtime with -static-openmp
178 bool StaticOpenMP = Args.hasArg(options::OPT_static_openmp) &&
179 !Args.hasArg(options::OPT_static);
180 addOpenMPRuntime(CmdArgs, ToolChain, Args, StaticOpenMP);
181
182 if (D.CCCIsCXX()) {
183 if (ToolChain.ShouldLinkCXXStdlib(Args))
184 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
185 if (Args.hasArg(options::OPT_pg))
186 CmdArgs.push_back("-lm_p");
187 else
188 CmdArgs.push_back("-lm");
189 }
190 if (NeedsSanitizerDeps) {
191 CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins"));
192 linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
193 }
194 if (NeedsXRayDeps) {
195 CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins"));
196 linkXRayRuntimeDeps(ToolChain, CmdArgs);
197 }
198 // FIXME: For some reason GCC passes -lgcc before adding
199 // the default system libraries. Just mimic this for now.
200 CmdArgs.push_back("-lcompiler_rt");
201
202 if (Args.hasArg(options::OPT_pthread)) {
203 if (!Args.hasArg(options::OPT_shared) && Args.hasArg(options::OPT_pg))
204 CmdArgs.push_back("-lpthread_p");
205 else
206 CmdArgs.push_back("-lpthread");
207 }
208
209 if (!Args.hasArg(options::OPT_shared)) {
210 if (Args.hasArg(options::OPT_pg))
211 CmdArgs.push_back("-lc_p");
212 else
213 CmdArgs.push_back("-lc");
214 }
215
216 CmdArgs.push_back("-lcompiler_rt");
217 }
218
219 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
220 const char *crtend = nullptr;
221 if (!Args.hasArg(options::OPT_shared))
222 crtend = "crtend.o";
223 else
224 crtend = "crtendS.o";
225
226 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
227 }
228
229 ToolChain.addProfileRTLibs(Args, CmdArgs);
230
231 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
232 C.addCommand(std::make_unique<Command>(JA, *this,
233 ResponseFileSupport::AtFileCurCP(),
234 Exec, CmdArgs, Inputs, Output));
235 }
236
getSupportedSanitizers() const237 SanitizerMask OpenBSD::getSupportedSanitizers() const {
238 const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
239 const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
240
241 // For future use, only UBsan at the moment
242 SanitizerMask Res = ToolChain::getSupportedSanitizers();
243
244 if (IsX86 || IsX86_64) {
245 Res |= SanitizerKind::Vptr;
246 Res |= SanitizerKind::Fuzzer;
247 Res |= SanitizerKind::FuzzerNoLink;
248 }
249
250 return Res;
251 }
252
253 /// OpenBSD - OpenBSD tool chain which can call as(1) and ld(1) directly.
254
OpenBSD(const Driver & D,const llvm::Triple & Triple,const ArgList & Args)255 OpenBSD::OpenBSD(const Driver &D, const llvm::Triple &Triple,
256 const ArgList &Args)
257 : Generic_ELF(D, Triple, Args) {
258 getFilePaths().push_back(getDriver().SysRoot + "/usr/lib");
259 }
260
AddClangSystemIncludeArgs(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const261 void OpenBSD::AddClangSystemIncludeArgs(
262 const llvm::opt::ArgList &DriverArgs,
263 llvm::opt::ArgStringList &CC1Args) const {
264 const Driver &D = getDriver();
265
266 if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
267 return;
268
269 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
270 SmallString<128> Dir(D.ResourceDir);
271 llvm::sys::path::append(Dir, "include");
272 addSystemInclude(DriverArgs, CC1Args, Dir.str());
273 }
274
275 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
276 return;
277
278 // Check for configure-time C include directories.
279 StringRef CIncludeDirs(C_INCLUDE_DIRS);
280 if (CIncludeDirs != "") {
281 SmallVector<StringRef, 5> dirs;
282 CIncludeDirs.split(dirs, ":");
283 for (StringRef dir : dirs) {
284 StringRef Prefix =
285 llvm::sys::path::is_absolute(dir) ? StringRef(D.SysRoot) : "";
286 addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
287 }
288 return;
289 }
290
291 addExternCSystemInclude(DriverArgs, CC1Args, D.SysRoot + "/usr/include");
292 }
293
addLibCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const294 void OpenBSD::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
295 llvm::opt::ArgStringList &CC1Args) const {
296 addSystemInclude(DriverArgs, CC1Args,
297 getDriver().SysRoot + "/usr/include/c++/v1");
298 }
299
AddCXXStdlibLibArgs(const ArgList & Args,ArgStringList & CmdArgs) const300 void OpenBSD::AddCXXStdlibLibArgs(const ArgList &Args,
301 ArgStringList &CmdArgs) const {
302 bool Profiling = Args.hasArg(options::OPT_pg);
303
304 CmdArgs.push_back(Profiling ? "-lc++_p" : "-lc++");
305 CmdArgs.push_back(Profiling ? "-lc++abi_p" : "-lc++abi");
306 CmdArgs.push_back(Profiling ? "-lpthread_p" : "-lpthread");
307 }
308
getCompilerRT(const ArgList & Args,StringRef Component,FileType Type) const309 std::string OpenBSD::getCompilerRT(const ArgList &Args,
310 StringRef Component,
311 FileType Type) const {
312 SmallString<128> Path(getDriver().SysRoot);
313 llvm::sys::path::append(Path, "/usr/lib/libcompiler_rt.a");
314 return std::string(Path.str());
315 }
316
buildAssembler() const317 Tool *OpenBSD::buildAssembler() const {
318 return new tools::openbsd::Assembler(*this);
319 }
320
buildLinker() const321 Tool *OpenBSD::buildLinker() const { return new tools::openbsd::Linker(*this); }
322
HasNativeLLVMSupport() const323 bool OpenBSD::HasNativeLLVMSupport() const { return true; }
324