1 //===-- CrossWindows.cpp - Cross Windows Tool Chain -----------------------===//
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 "CrossWindows.h"
10 #include "CommonArgs.h"
11 #include "clang/Driver/Compilation.h"
12 #include "clang/Driver/Driver.h"
13 #include "clang/Driver/Options.h"
14 #include "clang/Driver/SanitizerArgs.h"
15 #include "llvm/Option/ArgList.h"
16 #include "llvm/Support/Path.h"
17
18 using namespace clang::driver;
19 using namespace clang::driver::toolchains;
20
21 using llvm::opt::ArgList;
22 using llvm::opt::ArgStringList;
23
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const24 void tools::CrossWindows::Assembler::ConstructJob(
25 Compilation &C, const JobAction &JA, const InputInfo &Output,
26 const InputInfoList &Inputs, const ArgList &Args,
27 const char *LinkingOutput) const {
28 claimNoWarnArgs(Args);
29 const auto &TC =
30 static_cast<const toolchains::CrossWindowsToolChain &>(getToolChain());
31 ArgStringList CmdArgs;
32 const char *Exec;
33
34 switch (TC.getArch()) {
35 default:
36 llvm_unreachable("unsupported architecture");
37 case llvm::Triple::arm:
38 case llvm::Triple::thumb:
39 case llvm::Triple::aarch64:
40 break;
41 case llvm::Triple::x86:
42 CmdArgs.push_back("--32");
43 break;
44 case llvm::Triple::x86_64:
45 CmdArgs.push_back("--64");
46 break;
47 }
48
49 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
50
51 CmdArgs.push_back("-o");
52 CmdArgs.push_back(Output.getFilename());
53
54 for (const auto &Input : Inputs)
55 CmdArgs.push_back(Input.getFilename());
56
57 const std::string Assembler = TC.GetProgramPath("as");
58 Exec = Args.MakeArgString(Assembler);
59
60 C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
61 Exec, CmdArgs, Inputs, Output));
62 }
63
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const64 void tools::CrossWindows::Linker::ConstructJob(
65 Compilation &C, const JobAction &JA, const InputInfo &Output,
66 const InputInfoList &Inputs, const ArgList &Args,
67 const char *LinkingOutput) const {
68 const auto &TC =
69 static_cast<const toolchains::CrossWindowsToolChain &>(getToolChain());
70 const llvm::Triple &T = TC.getTriple();
71 const Driver &D = TC.getDriver();
72 SmallString<128> EntryPoint;
73 ArgStringList CmdArgs;
74 const char *Exec;
75
76 // Silence warning for "clang -g foo.o -o foo"
77 Args.ClaimAllArgs(options::OPT_g_Group);
78 // and "clang -emit-llvm foo.o -o foo"
79 Args.ClaimAllArgs(options::OPT_emit_llvm);
80 // and for "clang -w foo.o -o foo"
81 Args.ClaimAllArgs(options::OPT_w);
82 // Other warning options are already handled somewhere else.
83
84 if (!D.SysRoot.empty())
85 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
86
87 if (Args.hasArg(options::OPT_pie))
88 CmdArgs.push_back("-pie");
89 if (Args.hasArg(options::OPT_rdynamic))
90 CmdArgs.push_back("-export-dynamic");
91 if (Args.hasArg(options::OPT_s))
92 CmdArgs.push_back("--strip-all");
93
94 CmdArgs.push_back("-m");
95 switch (TC.getArch()) {
96 default:
97 llvm_unreachable("unsupported architecture");
98 case llvm::Triple::arm:
99 case llvm::Triple::thumb:
100 // FIXME: this is incorrect for WinCE
101 CmdArgs.push_back("thumb2pe");
102 break;
103 case llvm::Triple::aarch64:
104 CmdArgs.push_back("arm64pe");
105 break;
106 case llvm::Triple::x86:
107 CmdArgs.push_back("i386pe");
108 EntryPoint.append("_");
109 break;
110 case llvm::Triple::x86_64:
111 CmdArgs.push_back("i386pep");
112 break;
113 }
114
115 if (Args.hasArg(options::OPT_shared)) {
116 switch (T.getArch()) {
117 default:
118 llvm_unreachable("unsupported architecture");
119 case llvm::Triple::aarch64:
120 case llvm::Triple::arm:
121 case llvm::Triple::thumb:
122 case llvm::Triple::x86_64:
123 EntryPoint.append("_DllMainCRTStartup");
124 break;
125 case llvm::Triple::x86:
126 EntryPoint.append("_DllMainCRTStartup@12");
127 break;
128 }
129
130 CmdArgs.push_back("-shared");
131 CmdArgs.push_back(Args.hasArg(options::OPT_static) ? "-Bstatic"
132 : "-Bdynamic");
133
134 CmdArgs.push_back("--enable-auto-image-base");
135
136 CmdArgs.push_back("--entry");
137 CmdArgs.push_back(Args.MakeArgString(EntryPoint));
138 } else {
139 EntryPoint.append("mainCRTStartup");
140
141 CmdArgs.push_back(Args.hasArg(options::OPT_static) ? "-Bstatic"
142 : "-Bdynamic");
143
144 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
145 CmdArgs.push_back("--entry");
146 CmdArgs.push_back(Args.MakeArgString(EntryPoint));
147 }
148
149 // FIXME: handle subsystem
150 }
151
152 // NOTE: deal with multiple definitions on Windows (e.g. COMDAT)
153 CmdArgs.push_back("--allow-multiple-definition");
154
155 CmdArgs.push_back("-o");
156 CmdArgs.push_back(Output.getFilename());
157
158 if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_rdynamic)) {
159 SmallString<261> ImpLib(Output.getFilename());
160 llvm::sys::path::replace_extension(ImpLib, ".lib");
161
162 CmdArgs.push_back("--out-implib");
163 CmdArgs.push_back(Args.MakeArgString(ImpLib));
164 }
165
166 Args.AddAllArgs(CmdArgs, options::OPT_L);
167 TC.AddFilePathLibArgs(Args, CmdArgs);
168 AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
169
170 if (TC.ShouldLinkCXXStdlib(Args)) {
171 bool StaticCXX = Args.hasArg(options::OPT_static_libstdcxx) &&
172 !Args.hasArg(options::OPT_static);
173 if (StaticCXX)
174 CmdArgs.push_back("-Bstatic");
175 TC.AddCXXStdlibLibArgs(Args, CmdArgs);
176 if (StaticCXX)
177 CmdArgs.push_back("-Bdynamic");
178 }
179
180 if (!Args.hasArg(options::OPT_nostdlib)) {
181 if (!Args.hasArg(options::OPT_nodefaultlibs)) {
182 // TODO handle /MT[d] /MD[d]
183 CmdArgs.push_back("-lmsvcrt");
184 AddRunTimeLibs(TC, D, CmdArgs, Args);
185 }
186 }
187
188 if (TC.getSanitizerArgs(Args).needsAsanRt()) {
189 // TODO handle /MT[d] /MD[d]
190 if (Args.hasArg(options::OPT_shared)) {
191 CmdArgs.push_back(TC.getCompilerRTArgString(Args, "asan_dll_thunk"));
192 } else {
193 for (const auto &Lib : {"asan_dynamic", "asan_dynamic_runtime_thunk"})
194 CmdArgs.push_back(TC.getCompilerRTArgString(Args, Lib));
195 // Make sure the dynamic runtime thunk is not optimized out at link time
196 // to ensure proper SEH handling.
197 CmdArgs.push_back(Args.MakeArgString("--undefined"));
198 CmdArgs.push_back(Args.MakeArgString(TC.getArch() == llvm::Triple::x86
199 ? "___asan_seh_interceptor"
200 : "__asan_seh_interceptor"));
201 }
202 }
203
204 Exec = Args.MakeArgString(TC.GetLinkerPath());
205
206 C.addCommand(std::make_unique<Command>(JA, *this,
207 ResponseFileSupport::AtFileUTF8(),
208 Exec, CmdArgs, Inputs, Output));
209 }
210
CrossWindowsToolChain(const Driver & D,const llvm::Triple & T,const llvm::opt::ArgList & Args)211 CrossWindowsToolChain::CrossWindowsToolChain(const Driver &D,
212 const llvm::Triple &T,
213 const llvm::opt::ArgList &Args)
214 : Generic_GCC(D, T, Args) {}
215
216 ToolChain::UnwindTableLevel
getDefaultUnwindTableLevel(const ArgList & Args) const217 CrossWindowsToolChain::getDefaultUnwindTableLevel(const ArgList &Args) const {
218 // FIXME: all non-x86 targets need unwind tables, however, LLVM currently does
219 // not know how to emit them.
220 return getArch() == llvm::Triple::x86_64 ? UnwindTableLevel::Asynchronous : UnwindTableLevel::None;
221 }
222
isPICDefault() const223 bool CrossWindowsToolChain::isPICDefault() const {
224 return getArch() == llvm::Triple::x86_64;
225 }
226
isPIEDefault(const llvm::opt::ArgList & Args) const227 bool CrossWindowsToolChain::isPIEDefault(const llvm::opt::ArgList &Args) const {
228 return getArch() == llvm::Triple::x86_64;
229 }
230
isPICDefaultForced() const231 bool CrossWindowsToolChain::isPICDefaultForced() const {
232 return getArch() == llvm::Triple::x86_64;
233 }
234
235 void CrossWindowsToolChain::
AddClangSystemIncludeArgs(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const236 AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
237 llvm::opt::ArgStringList &CC1Args) const {
238 const Driver &D = getDriver();
239 const std::string &SysRoot = D.SysRoot;
240
241 auto AddSystemAfterIncludes = [&]() {
242 for (const auto &P : DriverArgs.getAllArgValues(options::OPT_isystem_after))
243 addSystemInclude(DriverArgs, CC1Args, P);
244 };
245
246 if (DriverArgs.hasArg(options::OPT_nostdinc)) {
247 AddSystemAfterIncludes();
248 return;
249 }
250
251 addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include");
252 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
253 SmallString<128> ResourceDir(D.ResourceDir);
254 llvm::sys::path::append(ResourceDir, "include");
255 addSystemInclude(DriverArgs, CC1Args, ResourceDir);
256 }
257 AddSystemAfterIncludes();
258 addExternCSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include");
259 }
260
261 void CrossWindowsToolChain::
AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const262 AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
263 llvm::opt::ArgStringList &CC1Args) const {
264 const std::string &SysRoot = getDriver().SysRoot;
265
266 if (DriverArgs.hasArg(options::OPT_nostdinc) ||
267 DriverArgs.hasArg(options::OPT_nostdincxx))
268 return;
269
270 if (GetCXXStdlibType(DriverArgs) == ToolChain::CST_Libcxx)
271 addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/include/c++/v1");
272 }
273
274 void CrossWindowsToolChain::
AddCXXStdlibLibArgs(const llvm::opt::ArgList & Args,llvm::opt::ArgStringList & CmdArgs) const275 AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
276 llvm::opt::ArgStringList &CmdArgs) const {
277 if (GetCXXStdlibType(Args) == ToolChain::CST_Libcxx) {
278 CmdArgs.push_back("-lc++");
279 if (Args.hasArg(options::OPT_fexperimental_library))
280 CmdArgs.push_back("-lc++experimental");
281 }
282 }
283
getSupportedSanitizers() const284 clang::SanitizerMask CrossWindowsToolChain::getSupportedSanitizers() const {
285 SanitizerMask Res = ToolChain::getSupportedSanitizers();
286 Res |= SanitizerKind::Address;
287 Res |= SanitizerKind::PointerCompare;
288 Res |= SanitizerKind::PointerSubtract;
289 return Res;
290 }
291
buildLinker() const292 Tool *CrossWindowsToolChain::buildLinker() const {
293 return new tools::CrossWindows::Linker(*this);
294 }
295
buildAssembler() const296 Tool *CrossWindowsToolChain::buildAssembler() const {
297 return new tools::CrossWindows::Assembler(*this);
298 }
299