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 "clang/Driver/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
18using namespace clang::driver;
19using namespace clang::driver::toolchains;
20using namespace clang::driver::tools;
21using namespace clang;
22using namespace llvm::opt;
23
24static void addMultilibsFilePaths(const Driver &D, const MultilibSet &Multilibs,
25 const Multilib &Multilib,
26 StringRef InstallPath,
27 ToolChain::path_list &Paths) {
28 if (const auto &PathsCallback = Multilibs.filePathsCallback())
29 for (const auto &Path : PathsCallback(Multilib))
30 addPathIfExists(D, Path: InstallPath + Path, Paths);
31}
32
33/// CSKY Toolchain
34CSKYToolChain::CSKYToolChain(const Driver &D, const llvm::Triple &Triple,
35 const ArgList &Args)
36 : Generic_ELF(D, Triple, Args) {
37 GCCInstallation.init(TargetTriple: Triple, Args);
38 if (GCCInstallation.isValid()) {
39 Multilibs = GCCInstallation.getMultilibs();
40 SelectedMultilibs.assign(IL: {GCCInstallation.getMultilib()});
41 path_list &Paths = getFilePaths();
42 // Add toolchain/multilib specific file paths.
43 addMultilibsFilePaths(D, Multilibs, Multilib: SelectedMultilibs.back(),
44 InstallPath: GCCInstallation.getInstallPath(), Paths);
45 getFilePaths().push_back(Elt: GCCInstallation.getInstallPath().str() +
46 SelectedMultilibs.back().osSuffix());
47 ToolChain::path_list &PPaths = getProgramPaths();
48 // Multilib cross-compiler GCC installations put ld in a triple-prefixed
49 // directory off of the parent of the GCC installation.
50 PPaths.push_back(Elt: Twine(GCCInstallation.getParentLibPath() + "/../" +
51 GCCInstallation.getTriple().str() + "/bin")
52 .str());
53 PPaths.push_back(Elt: (GCCInstallation.getParentLibPath() + "/../bin").str());
54 getFilePaths().push_back(Elt: computeSysRoot() + "/lib" +
55 SelectedMultilibs.back().osSuffix());
56 } else {
57 getProgramPaths().push_back(Elt: D.Dir);
58 getFilePaths().push_back(Elt: computeSysRoot() + "/lib");
59 }
60}
61
62Tool *CSKYToolChain::buildLinker() const {
63 return new tools::CSKY::Linker(*this);
64}
65
66ToolChain::RuntimeLibType CSKYToolChain::GetDefaultRuntimeLibType() const {
67 return GCCInstallation.isValid() ? ToolChain::RLT_Libgcc
68 : ToolChain::RLT_CompilerRT;
69}
70
71ToolChain::UnwindLibType
72CSKYToolChain::GetUnwindLibType(const llvm::opt::ArgList &Args) const {
73 return ToolChain::UNW_None;
74}
75
76void CSKYToolChain::addClangTargetOptions(const llvm::opt::ArgList &DriverArgs,
77 llvm::opt::ArgStringList &CC1Args,
78 Action::OffloadKind) const {
79 CC1Args.push_back(Elt: "-nostdsysteminc");
80}
81
82void CSKYToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
83 ArgStringList &CC1Args) const {
84 if (DriverArgs.hasArg(Ids: options::OPT_nostdinc))
85 return;
86
87 if (!DriverArgs.hasArg(Ids: options::OPT_nostdlibinc)) {
88 SmallString<128> Dir(computeSysRoot());
89 llvm::sys::path::append(path&: Dir, a: "include");
90 addSystemInclude(DriverArgs, CC1Args, Path: Dir.str());
91 SmallString<128> Dir2(computeSysRoot());
92 llvm::sys::path::append(path&: Dir2, a: "sys-include");
93 addSystemInclude(DriverArgs, CC1Args, Path: Dir2.str());
94 }
95}
96
97void CSKYToolChain::addLibStdCxxIncludePaths(
98 const llvm::opt::ArgList &DriverArgs,
99 llvm::opt::ArgStringList &CC1Args) const {
100 const GCCVersion &Version = GCCInstallation.getVersion();
101 StringRef TripleStr = GCCInstallation.getTriple().str();
102 const Multilib &Multilib = GCCInstallation.getMultilib();
103 addLibStdCXXIncludePaths(IncludeDir: computeSysRoot() + "/include/c++/" + Version.Text,
104 Triple: TripleStr, IncludeSuffix: Multilib.includeSuffix(), DriverArgs,
105 CC1Args);
106}
107
108std::string CSKYToolChain::computeSysRoot() const {
109 if (!getDriver().SysRoot.empty())
110 return getDriver().SysRoot;
111
112 SmallString<128> SysRootDir;
113 if (GCCInstallation.isValid()) {
114 StringRef LibDir = GCCInstallation.getParentLibPath();
115 StringRef TripleStr = GCCInstallation.getTriple().str();
116 llvm::sys::path::append(path&: SysRootDir, a: LibDir, b: "..", c: TripleStr);
117 } else {
118 // Use the triple as provided to the driver. Unlike the parsed triple
119 // this has not been normalized to always contain every field.
120 llvm::sys::path::append(path&: SysRootDir, a: getDriver().Dir, b: "..",
121 c: getDriver().getTargetTriple());
122 }
123
124 if (!llvm::sys::fs::exists(Path: SysRootDir))
125 return std::string();
126
127 return std::string(SysRootDir);
128}
129
130void CSKY::Linker::ConstructJob(Compilation &C, const JobAction &JA,
131 const InputInfo &Output,
132 const InputInfoList &Inputs,
133 const ArgList &Args,
134 const char *LinkingOutput) const {
135 const ToolChain &ToolChain = getToolChain();
136 const Driver &D = ToolChain.getDriver();
137 ArgStringList CmdArgs;
138
139 if (!D.SysRoot.empty())
140 CmdArgs.push_back(Elt: Args.MakeArgString(Str: "--sysroot=" + D.SysRoot));
141
142 CmdArgs.push_back(Elt: "-m");
143 CmdArgs.push_back(Elt: "cskyelf");
144
145 std::string Linker = getToolChain().GetLinkerPath();
146
147 bool WantCRTs =
148 !Args.hasArg(Ids: options::OPT_nostdlib, Ids: options::OPT_nostartfiles);
149
150 const char *crtbegin, *crtend;
151 auto RuntimeLib = ToolChain.GetRuntimeLibType(Args);
152 if (RuntimeLib == ToolChain::RLT_Libgcc) {
153 crtbegin = "crtbegin.o";
154 crtend = "crtend.o";
155 } else {
156 assert(RuntimeLib == ToolChain::RLT_CompilerRT);
157 crtbegin = ToolChain.getCompilerRTArgString(Args, Component: "crtbegin",
158 Type: ToolChain::FT_Object);
159 crtend =
160 ToolChain.getCompilerRTArgString(Args, Component: "crtend", Type: ToolChain::FT_Object);
161 }
162
163 if (WantCRTs) {
164 CmdArgs.push_back(Elt: Args.MakeArgString(Str: ToolChain.GetFilePath(Name: "crt0.o")));
165 CmdArgs.push_back(Elt: Args.MakeArgString(Str: ToolChain.GetFilePath(Name: "crti.o")));
166 CmdArgs.push_back(Elt: Args.MakeArgString(Str: ToolChain.GetFilePath(Name: crtbegin)));
167 }
168
169 Args.AddAllArgs(Output&: CmdArgs, Id0: options::OPT_L);
170 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
171 Args.addAllArgs(Output&: CmdArgs, Ids: {options::OPT_T_Group, options::OPT_s,
172 options::OPT_t, options::OPT_r});
173
174 AddLinkerInputs(TC: ToolChain, Inputs, Args, CmdArgs, JA);
175
176 // TODO: add C++ includes and libs if compiling C++.
177
178 if (!Args.hasArg(Ids: options::OPT_nostdlib) &&
179 !Args.hasArg(Ids: options::OPT_nodefaultlibs)) {
180 if (ToolChain.ShouldLinkCXXStdlib(Args))
181 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
182 CmdArgs.push_back(Elt: "--start-group");
183 CmdArgs.push_back(Elt: "-lc");
184 if (Args.hasArg(Ids: options::OPT_msim))
185 CmdArgs.push_back(Elt: "-lsemi");
186 else
187 CmdArgs.push_back(Elt: "-lnosys");
188 CmdArgs.push_back(Elt: "--end-group");
189 AddRunTimeLibs(TC: ToolChain, D: ToolChain.getDriver(), CmdArgs, Args);
190 }
191
192 if (WantCRTs) {
193 CmdArgs.push_back(Elt: Args.MakeArgString(Str: ToolChain.GetFilePath(Name: crtend)));
194 CmdArgs.push_back(Elt: Args.MakeArgString(Str: ToolChain.GetFilePath(Name: "crtn.o")));
195 }
196
197 CmdArgs.push_back(Elt: "-o");
198 CmdArgs.push_back(Elt: Output.getFilename());
199 C.addCommand(C: std::make_unique<Command>(
200 args: JA, args: *this, args: ResponseFileSupport::AtFileCurCP(), args: Args.MakeArgString(Str: Linker),
201 args&: CmdArgs, args: Inputs, args: Output));
202}
203// CSKY tools end.
204