clang 8.0.0

OpenBSD.cpp
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1 //===--- OpenBSD.cpp - OpenBSD ToolChain Implementations --------*- C++ -*-===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 #include "OpenBSD.h"
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"
18
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;
24
25 void openbsd::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
26 const InputInfo &Output,
27 const InputInfoList &Inputs,
28 const ArgList &Args,
29 const char *LinkingOutput) const {
30 claimNoWarnArgs(Args);
31 ArgStringList CmdArgs;
32
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");
38 break;
39
40 case llvm::Triple::ppc:
41 CmdArgs.push_back("-mppc");
42 CmdArgs.push_back("-many");
43 break;
44
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);
51 break;
52 }
53
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);
59 break;
60 }
61
62 case llvm::Triple::mips64:
63 case llvm::Triple::mips64el: {
64 StringRef CPUName;
65 StringRef ABIName;
66 mips::getMipsCPUAndABI(Args, getToolChain().getTriple(), CPUName, ABIName);
67
68 CmdArgs.push_back("-mabi");
69 CmdArgs.push_back(mips::getGnuCompatibleMipsABIName(ABIName).data());
70
71 if (getToolChain().getTriple().isLittleEndian())
72 CmdArgs.push_back("-EL");
73 else
74 CmdArgs.push_back("-EB");
75
76 AddAssemblerKPIC(getToolChain(), Args, CmdArgs);
77 break;
78 }
79
80 default:
81 break;
82 }
83
84 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
85
86 CmdArgs.push_back("-o");
87 CmdArgs.push_back(Output.getFilename());
88
89 for (const auto &II : Inputs)
90 CmdArgs.push_back(II.getFilename());
91
92 const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
93 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
94 }
95
96 void openbsd::Linker::ConstructJob(Compilation &C, const JobAction &JA,
97 const InputInfo &Output,
98 const InputInfoList &Inputs,
99 const ArgList &Args,
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;
105
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);
113
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");
118
119 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_shared)) {
120 CmdArgs.push_back("-e");
121 CmdArgs.push_back("__start");
122 }
123
124 CmdArgs.push_back("--eh-frame-hdr");
125 if (Args.hasArg(options::OPT_static)) {
126 CmdArgs.push_back("-Bstatic");
127 } else {
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");
133 } else {
134 CmdArgs.push_back("-dynamic-linker");
135 CmdArgs.push_back("/usr/libexec/ld.so");
136 }
137 }
138
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");
143
144 if (Output.isFilename()) {
145 CmdArgs.push_back("-o");
146 CmdArgs.push_back(Output.getFilename());
147 } else {
148 assert(Output.isNothing() && "Invalid output.");
149 }
150
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))
156 crt0 = "gcrt0.o";
157 else if (Args.hasArg(options::OPT_static) &&
158 !Args.hasArg(options::OPT_nopie))
159 crt0 = "rcrt0.o";
160 else
161 crt0 = "crt0.o";
162 crtbegin = "crtbegin.o";
163 } else {
164 crtbegin = "crtbeginS.o";
165 }
166
167 if (crt0)
168 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crt0)));
169 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
170 }
171
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});
177
178 bool NeedsSanitizerDeps = addSanitizerRuntimes(ToolChain, Args, CmdArgs);
179 bool NeedsXRayDeps = addXRayRuntime(ToolChain, Args, CmdArgs);
180 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
181
182 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
183 if (D.CCCIsCXX()) {
184 if (ToolChain.ShouldLinkCXXStdlib(Args))
185 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
186 if (Args.hasArg(options::OPT_pg))
187 CmdArgs.push_back("-lm_p");
188 else
189 CmdArgs.push_back("-lm");
190 }
191 if (NeedsSanitizerDeps) {
192 CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins", false));
193 linkSanitizerRuntimeDeps(ToolChain, CmdArgs);
194 }
195 if (NeedsXRayDeps) {
196 CmdArgs.push_back(ToolChain.getCompilerRTArgString(Args, "builtins", false));
197 linkXRayRuntimeDeps(ToolChain, CmdArgs);
198 }
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");
202
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");
206 else
207 CmdArgs.push_back("-lpthread");
208 }
209
210 if (!Args.hasArg(options::OPT_shared)) {
211 if (Args.hasArg(options::OPT_pg))
212 CmdArgs.push_back("-lc_p");
213 else
214 CmdArgs.push_back("-lc");
215 }
216
217 CmdArgs.push_back("-lcompiler_rt");
218 }
219
220 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
221 const char *crtend = nullptr;
222 if (!Args.hasArg(options::OPT_shared))
223 crtend = "crtend.o";
224 else
225 crtend = "crtendS.o";
226
227 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
228 }
229
230 const char *Exec = Args.MakeArgString(
231 !NeedsSanitizerDeps ? ToolChain.GetLinkerPath()
232 : ToolChain.GetProgramPath("ld.lld"));
233 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
234 }
235
236 SanitizerMask OpenBSD::getSupportedSanitizers() const {
237 const bool IsX86 = getTriple().getArch() == llvm::Triple::x86;
238 const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
239
240 // For future use, only UBsan at the moment
241 SanitizerMask Res = ToolChain::getSupportedSanitizers();
242
243 if (IsX86 || IsX86_64) {
244 Res |= SanitizerKind::Vptr;
245 Res |= SanitizerKind::Fuzzer;
246 Res |= SanitizerKind::FuzzerNoLink;
247 }
248
249 return Res;
250 }
251
252 /// OpenBSD - OpenBSD tool chain which can call as(1) and ld(1) directly.
253
254 OpenBSD::OpenBSD(const Driver &D, const llvm::Triple &Triple,
255 const ArgList &Args)
256 : Generic_ELF(D, Triple, Args) {
257 getFilePaths().push_back(getDriver().SysRoot + "/usr/lib");
258 }
259
260 void OpenBSD::AddCXXStdlibLibArgs(const ArgList &Args,
261 ArgStringList &CmdArgs) const {
262 bool Profiling = Args.hasArg(options::OPT_pg);
263
264 CmdArgs.push_back(Profiling ? "-lc++_p" : "-lc++");
265 CmdArgs.push_back(Profiling ? "-lc++abi_p" : "-lc++abi");
266 }
267
268 Tool *OpenBSD::buildAssembler() const {
269 return new tools::openbsd::Assembler(*this);
270 }
271
272 Tool *OpenBSD::buildLinker() const { return new tools::openbsd::Linker(*this); }
clang::driver::tools::addXRayRuntime
bool addXRayRuntime(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
clang::driver::tools::sparc::getSparcAsmModeForCPU
const char * getSparcAsmModeForCPU(llvm::StringRef Name, const llvm::Triple &Triple)
clang::driver::ToolChain::getCompilerRTArgString
const char * getCompilerRTArgString(const llvm::opt::ArgList &Args, StringRef Component, bool Shared=false) const
Definition: ToolChain.cpp:392
clang::driver::toolchains::OpenBSD::buildLinker
Tool * buildLinker() const override
Definition: OpenBSD.cpp:272
clang::driver::ToolChain::GetLinkerPath
std::string GetLinkerPath() const
Returns the linker path, respecting the -fuse-ld= argument to determine the linker suffix or name...
Definition: ToolChain.cpp:439
clang::driver::tools::getCPUName
std::string getCPUName(const llvm::opt::ArgList &Args, const llvm::Triple &T, bool FromAs=false)
clang::driver::InputInfo::getFilename
const char * getFilename() const
Definition: InputInfo.h:84
SanitizerArgs.h
CommonArgs.h
clang::driver::tools::linkSanitizerRuntimeDeps
void linkSanitizerRuntimeDeps(const ToolChain &TC, llvm::opt::ArgStringList &CmdArgs)
clang::driver::JobAction
Definition: Action.h:374
clang::driver::tools::addSanitizerRuntimes
bool addSanitizerRuntimes(const ToolChain &TC, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
clang::driver::tools
Definition: AMDGPU.h:21
Sparc.h
clang::driver::InputInfo
InputInfo - Wrapper for information about an input source.
Definition: InputInfo.h:23
clang::driver::ToolChain::GetFilePath
std::string GetFilePath(const char *Name) const
Definition: ToolChain.cpp:431
clang::driver::ToolChain::getFilePaths
path_list & getFilePaths()
Definition: ToolChain.h:224
clang::driver::Driver
Driver - Encapsulate logic for constructing compilation processes from a set of gcc-driver-like comma...
Definition: Driver.h:58
Compilation.h
clang::driver::tools::linkXRayRuntimeDeps
void linkXRayRuntimeDeps(const ToolChain &TC, llvm::opt::ArgStringList &CmdArgs)
clang::driver::toolchains::OpenBSD::AddCXXStdlibLibArgs
void AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const override
AddCXXStdlibLibArgs - Add the system specific linker arguments to use for the given C++ standard libr...
Definition: OpenBSD.cpp:260
clang::driver::toolchains::Generic_ELF
Definition: Gnu.h:340
llvm::opt
Definition: Action.h:24
clang::driver::tools::openbsd::Assembler::ConstructJob
void ConstructJob(Compilation &C, const JobAction &JA, const InputInfo &Output, const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs, const char *LinkingOutput) const override
ConstructJob - Construct jobs to perform the action JA, writing to Output and with Inputs...
Definition: OpenBSD.cpp:25
clang::driver::Compilation::addCommand
void addCommand(std::unique_ptr< Command > C)
Definition: Compilation.h:206
clang::driver::tools::AddAssemblerKPIC
void AddAssemblerKPIC(const ToolChain &ToolChain, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs)
clang::driver::ToolChain::getArch
llvm::Triple::ArchType getArch() const
Definition: ToolChain.h:202
clang::driver::ToolChain::AddFilePathLibArgs
void AddFilePathLibArgs(const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs) const
AddFilePathLibArgs - Add each thing in getFilePaths() as a "-L" option.
Definition: ToolChain.cpp:778
clang::driver::ToolChain::getDriver
const Driver & getDriver() const
Definition: ToolChain.h:186
clang::driver::toolchains::OpenBSD::buildAssembler
Tool * buildAssembler() const override
Definition: OpenBSD.cpp:268
clang::driver::Driver::CCCIsCXX
bool CCCIsCXX() const
Whether the driver should follow g++ like behavior.
Definition: Driver.h:173
clang::driver::tools::openbsd::Linker::ConstructJob
void ConstructJob(Compilation &C, const JobAction &JA, const InputInfo &Output, const InputInfoList &Inputs, const llvm::opt::ArgList &TCArgs, const char *LinkingOutput) const override
ConstructJob - Construct jobs to perform the action JA, writing to Output and with Inputs...
Definition: OpenBSD.cpp:96
llvm::SmallVector
Definition: LLVM.h:36
Options.h
clang::driver::toolchains::OpenBSD
Definition: OpenBSD.h:53
clang::driver::tools::openbsd::Linker
Definition: OpenBSD.h:36
clang::driver::tools::openbsd::Assembler
Definition: OpenBSD.h:23
clang::driver::ToolChain::ShouldLinkCXXStdlib
bool ShouldLinkCXXStdlib(const llvm::opt::ArgList &Args) const
Returns if the C++ standard library should be linked in.
Definition: ToolChain.cpp:755
clang
Dataflow Directional Tag Classes.
Definition: CFGReachabilityAnalysis.h:22
Mips.h
clang::driver::tools::AddLinkerInputs
void AddLinkerInputs(const ToolChain &TC, const InputInfoList &Inputs, const llvm::opt::ArgList &Args, llvm::opt::ArgStringList &CmdArgs, const JobAction &JA)
clang::driver::Tool
Tool - Information on a specific compilation tool.
Definition: Tool.h:34
clang::driver::tools::claimNoWarnArgs
void claimNoWarnArgs(const llvm::opt::ArgList &Args)
clang::SanitizerMask
uint64_t SanitizerMask
Definition: Sanitizers.h:26
clang::driver::Compilation
Compilation - A set of tasks to perform for a single driver invocation.
Definition: Compilation.h:46
clang::driver
Definition: Action.h:32
clang::driver::ToolChain::getSupportedSanitizers
virtual SanitizerMask getSupportedSanitizers() const
Return sanitizers which are available in this toolchain.
Definition: ToolChain.cpp:818
clang::driver::tools::mips::getGnuCompatibleMipsABIName
StringRef getGnuCompatibleMipsABIName(StringRef ABI)
Definition: Mips.cpp:144
clang::driver::toolchains
Definition: AMDGPU.h:41
clang::driver::InputInfo::isNothing
bool isNothing() const
Definition: InputInfo.h:75
clang::driver::ToolChain::GetProgramPath
std::string GetProgramPath(const char *Name) const
Definition: ToolChain.cpp:435
clang::driver::InputInfo::isFilename
bool isFilename() const
Definition: InputInfo.h:76
clang::driver::tools::mips::getMipsCPUAndABI
void getMipsCPUAndABI(const llvm::opt::ArgList &Args, const llvm::Triple &Triple, StringRef &CPUName, StringRef &ABIName)
OpenBSD.h
clang::driver::ToolChain
ToolChain - Access to tools for a single platform.
Definition: ToolChain.h:89