1 //===--- CSKYToolchain.cpp - CSKY 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 "CSKYToolChain.h"
10 #include "CommonArgs.h"
11 #include "clang/Driver/Compilation.h"
12 #include "clang/Driver/InputInfo.h"
13 #include "clang/Driver/Options.h"
14 #include "llvm/Option/ArgList.h"
15 #include "llvm/Support/FileSystem.h"
16 #include "llvm/Support/Path.h"
17 #include "llvm/Support/raw_ostream.h"
18
19 using namespace clang::driver;
20 using namespace clang::driver::toolchains;
21 using namespace clang::driver::tools;
22 using namespace clang;
23 using namespace llvm::opt;
24
addMultilibsFilePaths(const Driver & D,const MultilibSet & Multilibs,const Multilib & Multilib,StringRef InstallPath,ToolChain::path_list & Paths)25 static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs,
26 const Multilib &Multilib,
27 StringRef InstallPath,
28 ToolChain::path_list &Paths) {
29 if (const auto &PathsCallback = Multilibs.filePathsCallback())
30 for (const auto &Path : PathsCallback(Multilib))
31 addPathIfExists(D, InstallPath + Path, Paths);
32 }
33
34 /// CSKY Toolchain
CSKYToolChain(const Driver & D,const llvm::Triple & Triple,const ArgList & Args)35 CSKYToolChain::CSKYToolChain(const Driver &D, const llvm::Triple &Triple,
36 const ArgList &Args)
37 : Generic_ELF(D, Triple, Args) {
38 GCCInstallation.init(Triple, Args);
39 if (GCCInstallation.isValid()) {
40 Multilibs = GCCInstallation.getMultilibs();
41 SelectedMultilibs.assign({GCCInstallation.getMultilib()});
42 path_list &Paths = getFilePaths();
43 // Add toolchain/multilib specific file paths.
44 addMultilibsFilePaths(D, Multilibs, SelectedMultilibs.back(),
45 GCCInstallation.getInstallPath(), Paths);
46 getFilePaths().push_back(GCCInstallation.getInstallPath().str() +
47 SelectedMultilibs.back().osSuffix());
48 ToolChain::path_list &PPaths = getProgramPaths();
49 // Multilib cross-compiler GCC installations put ld in a triple-prefixed
50 // directory off of the parent of the GCC installation.
51 PPaths.push_back(Twine(GCCInstallation.getParentLibPath() + "/../" +
52 GCCInstallation.getTriple().str() + "/bin")
53 .str());
54 PPaths.push_back((GCCInstallation.getParentLibPath() + "/../bin").str());
55 getFilePaths().push_back(computeSysRoot() + "/lib" +
56 SelectedMultilibs.back().osSuffix());
57 } else {
58 getProgramPaths().push_back(D.Dir);
59 getFilePaths().push_back(computeSysRoot() + "/lib");
60 }
61 }
62
buildLinker() const63 Tool *CSKYToolChain::buildLinker() const {
64 return new tools::CSKY::Linker(*this);
65 }
66
GetDefaultRuntimeLibType() const67 ToolChain::RuntimeLibType CSKYToolChain::GetDefaultRuntimeLibType() const {
68 return GCCInstallation.isValid() ? ToolChain::RLT_Libgcc
69 : ToolChain::RLT_CompilerRT;
70 }
71
72 ToolChain::UnwindLibType
GetUnwindLibType(const llvm::opt::ArgList & Args) const73 CSKYToolChain::GetUnwindLibType(const llvm::opt::ArgList &Args) const {
74 return ToolChain::UNW_None;
75 }
76
addClangTargetOptions(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args,Action::OffloadKind) const77 void CSKYToolChain::addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
78 llvm::opt::ArgStringList &CC1Args,
79 Action::OffloadKind) const {
80 CC1Args.push_back("-nostdsysteminc");
81 }
82
AddClangSystemIncludeArgs(const ArgList & DriverArgs,ArgStringList & CC1Args) const83 void CSKYToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
84 ArgStringList &CC1Args) const {
85 if (DriverArgs.hasArg(options::OPT_nostdinc))
86 return;
87
88 if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) {
89 SmallString<128> Dir(computeSysRoot());
90 llvm::sys::path::append(Dir, "include");
91 addSystemInclude(DriverArgs, CC1Args, Dir.str());
92 SmallString<128> Dir2(computeSysRoot());
93 llvm::sys::path::append(Dir2, "sys-include");
94 addSystemInclude(DriverArgs, CC1Args, Dir2.str());
95 }
96 }
97
addLibStdCxxIncludePaths(const llvm::opt::ArgList & DriverArgs,llvm::opt::ArgStringList & CC1Args) const98 void CSKYToolChain::addLibStdCxxIncludePaths(
99 const llvm::opt::ArgList &DriverArgs,
100 llvm::opt::ArgStringList &CC1Args) const {
101 const GCCVersion &Version = GCCInstallation.getVersion();
102 StringRef TripleStr = GCCInstallation.getTriple().str();
103 const Multilib &Multilib = GCCInstallation.getMultilib();
104 addLibStdCXXIncludePaths(computeSysRoot() + "/include/c++/" + Version.Text,
105 TripleStr, Multilib.includeSuffix(), DriverArgs,
106 CC1Args);
107 }
108
computeSysRoot() const109 std::string CSKYToolChain::computeSysRoot() const {
110 if (!getDriver().SysRoot.empty())
111 return getDriver().SysRoot;
112
113 SmallString<128> SysRootDir;
114 if (GCCInstallation.isValid()) {
115 StringRef LibDir = GCCInstallation.getParentLibPath();
116 StringRef TripleStr = GCCInstallation.getTriple().str();
117 llvm::sys::path::append(SysRootDir, LibDir, "..", TripleStr);
118 } else {
119 // Use the triple as provided to the driver. Unlike the parsed triple
120 // this has not been normalized to always contain every field.
121 llvm::sys::path::append(SysRootDir, getDriver().Dir, "..",
122 getDriver().getTargetTriple());
123 }
124
125 if (!llvm::sys::fs::exists(SysRootDir))
126 return std::string();
127
128 return std::string(SysRootDir);
129 }
130
ConstructJob(Compilation & C,const JobAction & JA,const InputInfo & Output,const InputInfoList & Inputs,const ArgList & Args,const char * LinkingOutput) const131 void CSKY::Linker::ConstructJob(Compilation &C, const JobAction &JA,
132 const InputInfo &Output,
133 const InputInfoList &Inputs,
134 const ArgList &Args,
135 const char *LinkingOutput) const {
136 const ToolChain &ToolChain = getToolChain();
137 const Driver &D = ToolChain.getDriver();
138 ArgStringList CmdArgs;
139
140 if (!D.SysRoot.empty())
141 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
142
143 CmdArgs.push_back("-m");
144 CmdArgs.push_back("cskyelf");
145
146 std::string Linker = getToolChain().GetLinkerPath();
147
148 bool WantCRTs =
149 !Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles);
150
151 const char *crtbegin, *crtend;
152 auto RuntimeLib = ToolChain.GetRuntimeLibType(Args);
153 if (RuntimeLib == ToolChain::RLT_Libgcc) {
154 crtbegin = "crtbegin.o";
155 crtend = "crtend.o";
156 } else {
157 assert(RuntimeLib == ToolChain::RLT_CompilerRT);
158 crtbegin = ToolChain.getCompilerRTArgString(Args, "crtbegin",
159 ToolChain::FT_Object);
160 crtend =
161 ToolChain.getCompilerRTArgString(Args, "crtend", ToolChain::FT_Object);
162 }
163
164 if (WantCRTs) {
165 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
166 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
167 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
168 }
169
170 Args.AddAllArgs(CmdArgs, options::OPT_L);
171 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
172 Args.addAllArgs(CmdArgs, {options::OPT_T_Group, options::OPT_s,
173 options::OPT_t, options::OPT_r});
174
175 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
176
177 // TODO: add C++ includes and libs if compiling C++.
178
179 if (!Args.hasArg(options::OPT_nostdlib) &&
180 !Args.hasArg(options::OPT_nodefaultlibs)) {
181 if (ToolChain.ShouldLinkCXXStdlib(Args))
182 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
183 CmdArgs.push_back("--start-group");
184 CmdArgs.push_back("-lc");
185 if (Args.hasArg(options::OPT_msim))
186 CmdArgs.push_back("-lsemi");
187 else
188 CmdArgs.push_back("-lnosys");
189 CmdArgs.push_back("--end-group");
190 AddRunTimeLibs(ToolChain, ToolChain.getDriver(), CmdArgs, Args);
191 }
192
193 if (WantCRTs) {
194 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
195 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
196 }
197
198 CmdArgs.push_back("-o");
199 CmdArgs.push_back(Output.getFilename());
200 C.addCommand(std::make_unique<Command>(
201 JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Linker),
202 CmdArgs, Inputs, Output));
203 }
204 // CSKY tools end.
205