1 //===--- OpenBSD.cpp - OpenBSD ToolChain Implementations --------*- 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 //===----------------------------------------------------------------------===//
11 #include "Arch/Mips.h"
12 #include "Arch/Sparc.h"
13 #include "CommonArgs.h"
14 #include "clang/Driver/Compilation.h"
15 #include "clang/Driver/Options.h"
16 #include "clang/Driver/SanitizerArgs.h"
17 #include "llvm/Option/ArgList.h"
19 using namespace clang::driver;
20 using namespace clang::driver::tools;
21 using namespace clang::driver::toolchains;
22 using namespace clang;
23 using namespace llvm::opt;
25 void openbsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
26 const InputInfo &Output,
27 const InputInfoList &Inputs,
29 const char *LinkingOutput) const {
30 claimNoWarnArgs(Args);
31 ArgStringList CmdArgs;
33 switch (getToolChain().getArch()) {
34 case llvm::Triple::x86:
35 // When building 32-bit code on OpenBSD/amd64, we have to explicitly
36 // instruct as in the base system to assemble 32-bit code.
37 CmdArgs.push_back("--32");
40 case llvm::Triple::ppc:
41 CmdArgs.push_back("-mppc");
42 CmdArgs.push_back("-many");
45 case llvm::Triple::sparc:
46 case llvm::Triple::sparcel: {
47 CmdArgs.push_back("-32");
48 std::string CPU = getCPUName(Args, getToolChain().getTriple());
49 CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
50 AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
54 case llvm::Triple::sparcv9: {
55 CmdArgs.push_back("-64");
56 std::string CPU = getCPUName(Args, getToolChain().getTriple());
57 CmdArgs.push_back(sparc::getSparcAsmModeForCPU(CPU, getToolChain().getTriple()));
58 AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
62 case llvm::Triple::mips64:
63 case llvm::Triple::mips64el: {
66 mips::getMipsCPUAndABI(Args, getToolChain().getTriple(), CPUName, ABIName);
68 CmdArgs.push_back("-mabi");
69 CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data());
71 if (getToolChain().getTriple().isLittleEndian())
72 CmdArgs.push_back("-EL");
74 CmdArgs.push_back("-EB");
76 AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
84 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
86 CmdArgs.push_back("-o");
87 CmdArgs.push_back(Output.getFilename());
89 for (const auto &II : Inputs)
90 CmdArgs.push_back(II.getFilename());
92 const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
93 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
96 void openbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
97 const InputInfo &Output,
98 const InputInfoList &Inputs,
100 const char *LinkingOutput) const {
101 const toolchains::OpenBSD &ToolChain =
102 static_cast<const toolchains::OpenBSD &>(getToolChain());
103 const Driver &D = getToolChain().getDriver();
104 ArgStringList CmdArgs;
106 // Silence warning for "clang -g foo.o -o foo"
107 Args.ClaimAllArgs(options::OPT_g_Group);
108 // and "clang -emit-llvm foo.o -o foo"
109 Args.ClaimAllArgs(options::OPT_emit_llvm);
110 // and for "clang -w foo.o -o foo". Other warning options are already
111 // handled somewhere else.
112 Args.ClaimAllArgs(options::OPT_w);
114 if (ToolChain.getArch() == llvm::Triple::mips64)
115 CmdArgs.push_back("-EB");
116 else if (ToolChain.getArch() == llvm::Triple::mips64el)
117 CmdArgs.push_back("-EL");
119 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_shared)) {
120 CmdArgs.push_back("-e");
121 CmdArgs.push_back("__start");
124 CmdArgs.push_back("--eh-frame-hdr");
125 if (Args.hasArg(options::OPT_static)) {
126 CmdArgs.push_back("-Bstatic");
128 if (Args.hasArg(options::OPT_rdynamic))
129 CmdArgs.push_back("-export-dynamic");
130 CmdArgs.push_back("-Bdynamic");
131 if (Args.hasArg(options::OPT_shared)) {
132 CmdArgs.push_back("-shared");
134 CmdArgs.push_back("-dynamic-linker");
135 CmdArgs.push_back("/usr/libexec/ld.so");
139 if (Args.hasArg(options::OPT_pie))
140 CmdArgs.push_back("-pie");
141 if (Args.hasArg(options::OPT_nopie) || Args.hasArg(options::OPT_pg))
142 CmdArgs.push_back("-nopie");
144 if (Output.isFilename()) {
145 CmdArgs.push_back("-o");
146 CmdArgs.push_back(Output.getFilename());
148 assert(Output.isNothing() && "Invalid output.");
151 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
152 const char *crt0 = nullptr;
153 const char *crtbegin = nullptr;
154 if (!Args.hasArg(options::OPT_shared)) {
155 if (Args.hasArg(options::OPT_pg))
157 else if (Args.hasArg(options::OPT_static) &&
158 !Args.hasArg(options::OPT_nopie))
162 crtbegin = "crtbegin.o";
164 crtbegin = "crtbeginS.o";
168 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt0)));
169 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
172 Args.AddAllArgs(CmdArgs, options::OPT_L);
173 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
174 Args.AddAllArgs(CmdArgs, {options::OPT_T_Group, options::OPT_e,
175 options::OPT_s, options::OPT_t,
176 options::OPT_Z_Flag, options::OPT_r});
178 bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
179 bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
180 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
182 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
184 if (ToolChain.ShouldLinkCXXStdlib(Args))
185 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
186 if (Args.hasArg(options::OPT_pg))
187 CmdArgs.push_back("-lm_p");
189 CmdArgs.push_back("-lm");
191 if (NeedsSanitizerDeps) {
192 CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins", false));
193 linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
196 CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins", false));
197 linkXRayRuntimeDeps(ToolChain, CmdArgs);
199 // FIXME: For some reason GCC passes -lgcc before adding
200 // the default system libraries. Just mimic this for now.
201 CmdArgs.push_back("-lcompiler_rt");
203 if (Args.hasArg(options::OPT_pthread)) {
204 if (!Args.hasArg(options::OPT_shared) && Args.hasArg(options::OPT_pg))
205 CmdArgs.push_back("-lpthread_p");
207 CmdArgs.push_back("-lpthread");
210 if (!Args.hasArg(options::OPT_shared)) {
211 if (Args.hasArg(options::OPT_pg))
212 CmdArgs.push_back("-lc_p");
214 CmdArgs.push_back("-lc");
217 CmdArgs.push_back("-lcompiler_rt");
220 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
221 const char *crtend = nullptr;
222 if (!Args.hasArg(options::OPT_shared))
225 crtend = "crtendS.o";
227 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
230 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
231 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
234 SanitizerMask OpenBSD::getSupportedSanitizers() const {
235 const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
236 const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
238 // For future use, only UBsan at the moment
239 SanitizerMask Res = ToolChain::getSupportedSanitizers();
241 if (IsX86 || IsX86_64) {
242 Res |= SanitizerKind::Vptr;
243 Res |= SanitizerKind::Fuzzer;
244 Res |= SanitizerKind::FuzzerNoLink;
250 /// OpenBSD - OpenBSD tool chain which can call as(1) and ld(1) directly.
252 OpenBSD::OpenBSD(const Driver &D, const llvm::Triple &Triple,
254 : Generic_ELF(D, Triple, Args) {
255 getFilePaths().push_back(getDriver().SysRoot + "/usr/lib");
258 void OpenBSD::AddCXXStdlibLibArgs(const ArgList &Args,
259 ArgStringList &CmdArgs) const {
260 bool Profiling = Args.hasArg(options::OPT_pg);
262 CmdArgs.push_back(Profiling ? "-lc++_p" : "-lc++");
263 CmdArgs.push_back(Profiling ? "-lc++abi_p" : "-lc++abi");
266 Tool *OpenBSD::buildAssembler() const {
267 return new tools::openbsd::Assembler(*this);
270 Tool *OpenBSD::buildLinker() const { return new tools::openbsd::Linker(*this); }