1 //===--- BaremMetal.cpp - Bare Metal ToolChain ------------------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "BareMetal.h"
12 #include "CommonArgs.h"
13 #include "InputInfo.h"
16 #include "clang/Basic/VirtualFileSystem.h"
17 #include "clang/Driver/Compilation.h"
18 #include "clang/Driver/Driver.h"
19 #include "clang/Driver/DriverDiagnostic.h"
20 #include "clang/Driver/Options.h"
21 #include "llvm/Option/ArgList.h"
22 #include "llvm/Support/Path.h"
23 #include "llvm/Support/raw_ostream.h"
25 using namespace llvm::opt;
26 using namespace clang;
27 using namespace clang::driver;
28 using namespace clang::driver::tools;
29 using namespace clang::driver::toolchains;
31 BareMetal::BareMetal(const Driver &D, const llvm::Triple &Triple,
33 : ToolChain(D, Triple, Args) {
34 getProgramPaths().push_back(getDriver().getInstalledDir());
35 if (getDriver().getInstalledDir() != getDriver().Dir)
36 getProgramPaths().push_back(getDriver().Dir);
39 BareMetal::~BareMetal() {}
41 /// Is the triple {arm,thumb}-none-none-{eabi,eabihf} ?
42 static bool isARMBareMetal(const llvm::Triple &Triple) {
43 if (Triple.getArch() != llvm::Triple::arm &&
44 Triple.getArch() != llvm::Triple::thumb)
47 if (Triple.getVendor() != llvm::Triple::UnknownVendor)
50 if (Triple.getOS() != llvm::Triple::UnknownOS)
53 if (Triple.getEnvironment() != llvm::Triple::EABI &&
54 Triple.getEnvironment() != llvm::Triple::EABIHF)
60 bool BareMetal::handlesTarget(const llvm::Triple &Triple) {
61 return isARMBareMetal(Triple);
64 Tool *BareMetal::buildLinker() const {
65 return new tools::baremetal::Linker(*this);
68 std::string BareMetal::getRuntimesDir() const {
69 SmallString<128> Dir(getDriver().ResourceDir);
70 llvm::sys::path::append(Dir, "lib", "baremetal");
74 void BareMetal::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
75 ArgStringList &CC1Args) const {
76 if (DriverArgs.hasArg(options::OPT_nostdinc))
79 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
80 SmallString<128> Dir(getDriver().ResourceDir);
81 llvm::sys::path::append(Dir, "include");
82 addSystemInclude(DriverArgs, CC1Args, Dir.str());
85 if (!DriverArgs.hasArg(options::OPT_nostdlibinc)) {
86 SmallString<128> Dir(getDriver().SysRoot);
87 llvm::sys::path::append(Dir, "include");
88 addSystemInclude(DriverArgs, CC1Args, Dir.str());
92 void BareMetal::addClangTargetOptions(const ArgList &DriverArgs,
93 ArgStringList &CC1Args,
94 Action::OffloadKind) const {
95 CC1Args.push_back("-nostdsysteminc");
98 std::string BareMetal::findLibCxxIncludePath(CXXStdlibType LibType) const {
99 StringRef SysRoot = getDriver().SysRoot;
104 case ToolChain::CST_Libcxx: {
105 SmallString<128> Dir(SysRoot);
106 llvm::sys::path::append(Dir, "include", "c++", "v1");
109 case ToolChain::CST_Libstdcxx: {
110 SmallString<128> Dir(SysRoot);
111 llvm::sys::path::append(Dir, "include", "c++");
113 Generic_GCC::GCCVersion Version = {"", -1, -1, -1, "", "", ""};
114 // Walk the subdirs, and find the one with the newest gcc version:
115 for (vfs::directory_iterator LI =
116 getDriver().getVFS().dir_begin(Dir.str(), EC), LE;
117 !EC && LI != LE; LI = LI.increment(EC)) {
118 StringRef VersionText = llvm::sys::path::filename(LI->getName());
119 auto CandidateVersion = Generic_GCC::GCCVersion::Parse(VersionText);
120 if (CandidateVersion.Major == -1)
122 if (CandidateVersion <= Version)
124 Version = CandidateVersion;
126 if (Version.Major == -1)
128 llvm::sys::path::append(Dir, Version.Text);
132 llvm_unreachable("unhandled LibType");
135 void BareMetal::AddClangCXXStdlibIncludeArgs(
136 const ArgList &DriverArgs, ArgStringList &CC1Args) const {
137 if (DriverArgs.hasArg(options::OPT_nostdinc) ||
138 DriverArgs.hasArg(options::OPT_nostdlibinc) ||
139 DriverArgs.hasArg(options::OPT_nostdincxx))
142 std::string Path = findLibCxxIncludePath(GetCXXStdlibType(DriverArgs));
144 addSystemInclude(DriverArgs, CC1Args, Path);
147 void BareMetal::AddCXXStdlibLibArgs(const ArgList &Args,
148 ArgStringList &CmdArgs) const {
149 switch (GetCXXStdlibType(Args)) {
150 case ToolChain::CST_Libcxx:
151 CmdArgs.push_back("-lc++");
152 CmdArgs.push_back("-lc++abi");
154 case ToolChain::CST_Libstdcxx:
155 CmdArgs.push_back("-lstdc++");
156 CmdArgs.push_back("-lsupc++");
159 CmdArgs.push_back("-lunwind");
162 void BareMetal::AddLinkRuntimeLib(const ArgList &Args,
163 ArgStringList &CmdArgs) const {
164 CmdArgs.push_back(Args.MakeArgString("-lclang_rt.builtins-" +
165 getTriple().getArchName() + ".a"));
168 void baremetal::Linker::ConstructJob(Compilation &C, const JobAction &JA,
169 const InputInfo &Output,
170 const InputInfoList &Inputs,
172 const char *LinkingOutput) const {
173 ArgStringList CmdArgs;
175 auto &TC = static_cast<const toolchains::BareMetal&>(getToolChain());
177 AddLinkerInputs(TC, Inputs, Args, CmdArgs, JA);
179 CmdArgs.push_back("-Bstatic");
181 CmdArgs.push_back(Args.MakeArgString("-L" + TC.getRuntimesDir()));
183 Args.AddAllArgs(CmdArgs, {options::OPT_L, options::OPT_T_Group,
184 options::OPT_e, options::OPT_s, options::OPT_t,
185 options::OPT_Z_Flag, options::OPT_r});
187 if (TC.ShouldLinkCXXStdlib(Args))
188 TC.AddCXXStdlibLibArgs(Args, CmdArgs);
189 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
190 CmdArgs.push_back("-lc");
191 CmdArgs.push_back("-lm");
193 TC.AddLinkRuntimeLib(Args, CmdArgs);
196 CmdArgs.push_back("-o");
197 CmdArgs.push_back(Output.getFilename());
199 C.addCommand(llvm::make_unique<Command>(JA, *this,
200 Args.MakeArgString(TC.GetLinkerPath()),