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 "clang/Driver/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
18using namespace clang::driver;
19using namespace clang::driver::toolchains;
20
21using llvm::opt::ArgList;
22using llvm::opt::ArgStringList;
23
24void 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(Elt: "--32");
43 break;
44 case llvm::Triple::x86_64:
45 CmdArgs.push_back(Elt: "--64");
46 break;
47 }
48
49 Args.AddAllArgValues(Output&: CmdArgs, Id0: options::OPT_Wa_COMMA, Id1: options::OPT_Xassembler);
50
51 CmdArgs.push_back(Elt: "-o");
52 CmdArgs.push_back(Elt: Output.getFilename());
53
54 for (const auto &Input : Inputs)
55 CmdArgs.push_back(Elt: Input.getFilename());
56
57 const std::string Assembler = TC.GetProgramPath(Name: "as");
58 Exec = Args.MakeArgString(Str: Assembler);
59
60 C.addCommand(C: std::make_unique<Command>(args: JA, args: *this, args: ResponseFileSupport::None(),
61 args&: Exec, args&: CmdArgs, args: Inputs, args: Output));
62}
63
64void 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(Id0: options::OPT_g_Group);
78 // and "clang -emit-llvm foo.o -o foo"
79 Args.ClaimAllArgs(Id0: options::OPT_emit_llvm);
80 // and for "clang -w foo.o -o foo"
81 Args.ClaimAllArgs(Id0: options::OPT_w);
82 // Other warning options are already handled somewhere else.
83
84 if (!D.SysRoot.empty())
85 CmdArgs.push_back(Elt: Args.MakeArgString(Str: "--sysroot=" + D.SysRoot));
86
87 if (Args.hasArg(Ids: options::OPT_pie))
88 CmdArgs.push_back(Elt: "-pie");
89 if (Args.hasArg(Ids: options::OPT_rdynamic))
90 CmdArgs.push_back(Elt: "-export-dynamic");
91 if (Args.hasArg(Ids: options::OPT_s))
92 CmdArgs.push_back(Elt: "--strip-all");
93
94 CmdArgs.push_back(Elt: "-m");
95 switch (TC.getArch()) {
96 default:
97 D.Diag(DiagID: diag::err_target_unknown_triple) << TC.getEffectiveTriple().str();
98 break;
99 case llvm::Triple::arm:
100 case llvm::Triple::thumb:
101 // FIXME: this is incorrect for WinCE
102 CmdArgs.push_back(Elt: "thumb2pe");
103 break;
104 case llvm::Triple::aarch64:
105 CmdArgs.push_back(Elt: "arm64pe");
106 break;
107 case llvm::Triple::x86:
108 CmdArgs.push_back(Elt: "i386pe");
109 EntryPoint.append(RHS: "_");
110 break;
111 case llvm::Triple::x86_64:
112 CmdArgs.push_back(Elt: "i386pep");
113 break;
114 }
115
116 if (Args.hasArg(Ids: options::OPT_shared)) {
117 switch (T.getArch()) {
118 default:
119 llvm_unreachable("unsupported architecture");
120 case llvm::Triple::aarch64:
121 case llvm::Triple::arm:
122 case llvm::Triple::thumb:
123 case llvm::Triple::x86_64:
124 EntryPoint.append(RHS: "_DllMainCRTStartup");
125 break;
126 case llvm::Triple::x86:
127 EntryPoint.append(RHS: "_DllMainCRTStartup@12");
128 break;
129 }
130
131 CmdArgs.push_back(Elt: "-shared");
132 CmdArgs.push_back(Elt: Args.hasArg(Ids: options::OPT_static) ? "-Bstatic"
133 : "-Bdynamic");
134
135 CmdArgs.push_back(Elt: "--enable-auto-image-base");
136
137 CmdArgs.push_back(Elt: "--entry");
138 CmdArgs.push_back(Elt: Args.MakeArgString(Str: EntryPoint));
139 } else {
140 EntryPoint.append(RHS: "mainCRTStartup");
141
142 CmdArgs.push_back(Elt: Args.hasArg(Ids: options::OPT_static) ? "-Bstatic"
143 : "-Bdynamic");
144
145 if (!Args.hasArg(Ids: options::OPT_nostdlib, Ids: options::OPT_nostartfiles)) {
146 CmdArgs.push_back(Elt: "--entry");
147 CmdArgs.push_back(Elt: Args.MakeArgString(Str: EntryPoint));
148 }
149
150 // FIXME: handle subsystem
151 }
152
153 // NOTE: deal with multiple definitions on Windows (e.g. COMDAT)
154 CmdArgs.push_back(Elt: "--allow-multiple-definition");
155
156 CmdArgs.push_back(Elt: "-o");
157 CmdArgs.push_back(Elt: Output.getFilename());
158
159 if (Args.hasArg(Ids: options::OPT_shared) || Args.hasArg(Ids: options::OPT_rdynamic)) {
160 SmallString<261> ImpLib(Output.getFilename());
161 llvm::sys::path::replace_extension(path&: ImpLib, extension: ".lib");
162
163 CmdArgs.push_back(Elt: "--out-implib");
164 CmdArgs.push_back(Elt: Args.MakeArgString(Str: ImpLib));
165 }
166
167 Args.AddAllArgs(Output&: CmdArgs, Id0: options::OPT_L);
168 TC.AddFilePathLibArgs(Args, CmdArgs);
169 AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
170
171 if (TC.ShouldLinkCXXStdlib(Args)) {
172 bool StaticCXX = Args.hasArg(Ids: options::OPT_static_libstdcxx) &&
173 !Args.hasArg(Ids: options::OPT_static);
174 if (StaticCXX)
175 CmdArgs.push_back(Elt: "-Bstatic");
176 TC.AddCXXStdlibLibArgs(Args, CmdArgs);
177 if (StaticCXX)
178 CmdArgs.push_back(Elt: "-Bdynamic");
179 }
180
181 if (!Args.hasArg(Ids: options::OPT_nostdlib)) {
182 if (!Args.hasArg(Ids: options::OPT_nodefaultlibs)) {
183 // TODO handle /MT[d] /MD[d]
184 CmdArgs.push_back(Elt: "-lmsvcrt");
185 AddRunTimeLibs(TC, D, CmdArgs, Args);
186 }
187 }
188
189 if (TC.getSanitizerArgs(JobArgs: Args).needsAsanRt()) {
190 // TODO handle /MT[d] /MD[d]
191 if (Args.hasArg(Ids: options::OPT_shared)) {
192 CmdArgs.push_back(Elt: TC.getCompilerRTArgString(Args, Component: "asan_dll_thunk"));
193 } else {
194 for (const auto &Lib : {"asan_dynamic", "asan_dynamic_runtime_thunk"})
195 CmdArgs.push_back(Elt: TC.getCompilerRTArgString(Args, Component: Lib));
196 // Make sure the dynamic runtime thunk is not optimized out at link time
197 // to ensure proper SEH handling.
198 CmdArgs.push_back(Elt: Args.MakeArgString(Str: "--undefined"));
199 CmdArgs.push_back(Elt: Args.MakeArgString(Str: TC.getArch() == llvm::Triple::x86
200 ? "___asan_seh_interceptor"
201 : "__asan_seh_interceptor"));
202 }
203 }
204
205 Exec = Args.MakeArgString(Str: TC.GetLinkerPath());
206
207 C.addCommand(C: std::make_unique<Command>(args: JA, args: *this,
208 args: ResponseFileSupport::AtFileUTF8(),
209 args&: Exec, args&: CmdArgs, args: Inputs, args: Output));
210}
211
212CrossWindowsToolChain::CrossWindowsToolChain(const Driver &D,
213 const llvm::Triple &T,
214 const llvm::opt::ArgList &Args)
215 : Generic_GCC(D, T, Args) {}
216
217ToolChain::UnwindTableLevel
218CrossWindowsToolChain::getDefaultUnwindTableLevel(const ArgList &Args) const {
219 // FIXME: all non-x86 targets need unwind tables, however, LLVM currently does
220 // not know how to emit them.
221 return getArch() == llvm::Triple::x86_64 ? UnwindTableLevel::Asynchronous : UnwindTableLevel::None;
222}
223
224bool CrossWindowsToolChain::isPICDefault() const {
225 return getArch() == llvm::Triple::x86_64;
226}
227
228bool CrossWindowsToolChain::isPIEDefault(const llvm::opt::ArgList &Args) const {
229 return getArch() == llvm::Triple::x86_64;
230}
231
232bool CrossWindowsToolChain::isPICDefaultForced() const {
233 return getArch() == llvm::Triple::x86_64;
234}
235
236void CrossWindowsToolChain::
237AddClangSystemIncludeArgs(const llvm::opt::ArgList &DriverArgs,
238 llvm::opt::ArgStringList &CC1Args) const {
239 const Driver &D = getDriver();
240 const std::string &SysRoot = D.SysRoot;
241
242 auto AddSystemAfterIncludes = [&]() {
243 for (const auto &P : DriverArgs.getAllArgValues(Id: options::OPT_isystem_after))
244 addSystemInclude(DriverArgs, CC1Args, Path: P);
245 };
246
247 if (DriverArgs.hasArg(Ids: options::OPT_nostdinc)) {
248 AddSystemAfterIncludes();
249 return;
250 }
251
252 addSystemInclude(DriverArgs, CC1Args, Path: SysRoot + "/usr/local/include");
253 if (!DriverArgs.hasArg(Ids: options::OPT_nobuiltininc)) {
254 SmallString<128> ResourceDir(D.ResourceDir);
255 llvm::sys::path::append(path&: ResourceDir, a: "include");
256 addSystemInclude(DriverArgs, CC1Args, Path: ResourceDir);
257 }
258 AddSystemAfterIncludes();
259 addExternCSystemInclude(DriverArgs, CC1Args, Path: SysRoot + "/usr/include");
260}
261
262void CrossWindowsToolChain::
263AddClangCXXStdlibIncludeArgs(const llvm::opt::ArgList &DriverArgs,
264 llvm::opt::ArgStringList &CC1Args) const {
265 const std::string &SysRoot = getDriver().SysRoot;
266
267 if (DriverArgs.hasArg(Ids: options::OPT_nostdinc) ||
268 DriverArgs.hasArg(Ids: options::OPT_nostdincxx))
269 return;
270
271 if (GetCXXStdlibType(Args: DriverArgs) == ToolChain::CST_Libcxx)
272 addSystemInclude(DriverArgs, CC1Args, Path: SysRoot + "/usr/include/c++/v1");
273}
274
275void CrossWindowsToolChain::
276AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
277 llvm::opt::ArgStringList &CmdArgs) const {
278 if (GetCXXStdlibType(Args) == ToolChain::CST_Libcxx) {
279 CmdArgs.push_back(Elt: "-lc++");
280 if (Args.hasArg(Ids: options::OPT_fexperimental_library))
281 CmdArgs.push_back(Elt: "-lc++experimental");
282 }
283}
284
285clang::SanitizerMask CrossWindowsToolChain::getSupportedSanitizers() const {
286 SanitizerMask Res = ToolChain::getSupportedSanitizers();
287 Res |= SanitizerKind::Address;
288 Res |= SanitizerKind::PointerCompare;
289 Res |= SanitizerKind::PointerSubtract;
290 return Res;
291}
292
293Tool *CrossWindowsToolChain::buildLinker() const {
294 return new tools::CrossWindows::Linker(*this);
295}
296
297Tool *CrossWindowsToolChain::buildAssembler() const {
298 return new tools::CrossWindows::Assembler(*this);
299}
300