1 //===--- AIX.cpp - AIX 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 "AIX.h" 10 #include "Arch/PPC.h" 11 #include "CommonArgs.h" 12 #include "clang/Driver/Compilation.h" 13 #include "clang/Driver/Options.h" 14 #include "clang/Driver/SanitizerArgs.h" 15 #include "llvm/Option/ArgList.h" 16 #include "llvm/Support/Path.h" 17 18 using AIX = clang::driver::toolchains::AIX; 19 using namespace clang::driver; 20 using namespace clang::driver::tools; 21 using namespace clang::driver::toolchains; 22 23 using namespace llvm::opt; 24 using namespace llvm::sys; 25 26 void aix::Assembler::ConstructJob(Compilation &C, const JobAction &JA, 27 const InputInfo &Output, 28 const InputInfoList &Inputs, 29 const ArgList &Args, 30 const char *LinkingOutput) const { 31 ArgStringList CmdArgs; 32 33 const bool IsArch32Bit = getToolChain().getTriple().isArch32Bit(); 34 const bool IsArch64Bit = getToolChain().getTriple().isArch64Bit(); 35 // Only support 32 and 64 bit. 36 if (!IsArch32Bit && !IsArch64Bit) 37 llvm_unreachable("Unsupported bit width value."); 38 39 // Specify the mode in which the as(1) command operates. 40 if (IsArch32Bit) { 41 CmdArgs.push_back("-a32"); 42 } else { 43 // Must be 64-bit, otherwise asserted already. 44 CmdArgs.push_back("-a64"); 45 } 46 47 // Accept any mixture of instructions. 48 // On Power for AIX and Linux, this behaviour matches that of GCC for both the 49 // user-provided assembler source case and the compiler-produced assembler 50 // source case. Yet XL with user-provided assembler source would not add this. 51 CmdArgs.push_back("-many"); 52 53 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler); 54 55 // Specify assembler output file. 56 assert((Output.isFilename() || Output.isNothing()) && "Invalid output."); 57 if (Output.isFilename()) { 58 CmdArgs.push_back("-o"); 59 CmdArgs.push_back(Output.getFilename()); 60 } 61 62 // Specify assembler input file. 63 // The system assembler on AIX takes exactly one input file. The driver is 64 // expected to invoke as(1) separately for each assembler source input file. 65 if (Inputs.size() != 1) 66 llvm_unreachable("Invalid number of input files."); 67 const InputInfo &II = Inputs[0]; 68 assert((II.isFilename() || II.isNothing()) && "Invalid input."); 69 if (II.isFilename()) 70 CmdArgs.push_back(II.getFilename()); 71 72 const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as")); 73 C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(), 74 Exec, CmdArgs, Inputs, Output)); 75 } 76 77 void aix::Linker::ConstructJob(Compilation &C, const JobAction &JA, 78 const InputInfo &Output, 79 const InputInfoList &Inputs, const ArgList &Args, 80 const char *LinkingOutput) const { 81 const AIX &ToolChain = static_cast<const AIX &>(getToolChain()); 82 const Driver &D = ToolChain.getDriver(); 83 ArgStringList CmdArgs; 84 85 const bool IsArch32Bit = ToolChain.getTriple().isArch32Bit(); 86 const bool IsArch64Bit = ToolChain.getTriple().isArch64Bit(); 87 // Only support 32 and 64 bit. 88 if (!(IsArch32Bit || IsArch64Bit)) 89 llvm_unreachable("Unsupported bit width value."); 90 91 // Force static linking when "-static" is present. 92 if (Args.hasArg(options::OPT_static)) 93 CmdArgs.push_back("-bnso"); 94 95 // Add options for shared libraries. 96 if (Args.hasArg(options::OPT_shared)) { 97 CmdArgs.push_back("-bM:SRE"); 98 CmdArgs.push_back("-bnoentry"); 99 } 100 101 // Specify linker output file. 102 assert((Output.isFilename() || Output.isNothing()) && "Invalid output."); 103 if (Output.isFilename()) { 104 CmdArgs.push_back("-o"); 105 CmdArgs.push_back(Output.getFilename()); 106 } 107 108 // Set linking mode (i.e., 32/64-bit) and the address of 109 // text and data sections based on arch bit width. 110 if (IsArch32Bit) { 111 CmdArgs.push_back("-b32"); 112 CmdArgs.push_back("-bpT:0x10000000"); 113 CmdArgs.push_back("-bpD:0x20000000"); 114 } else { 115 // Must be 64-bit, otherwise asserted already. 116 CmdArgs.push_back("-b64"); 117 CmdArgs.push_back("-bpT:0x100000000"); 118 CmdArgs.push_back("-bpD:0x110000000"); 119 } 120 121 auto getCrt0Basename = [&Args, IsArch32Bit] { 122 // Enable gprofiling when "-pg" is specified. 123 if (Args.hasArg(options::OPT_pg)) 124 return IsArch32Bit ? "gcrt0.o" : "gcrt0_64.o"; 125 // Enable profiling when "-p" is specified. 126 else if (Args.hasArg(options::OPT_p)) 127 return IsArch32Bit ? "mcrt0.o" : "mcrt0_64.o"; 128 else 129 return IsArch32Bit ? "crt0.o" : "crt0_64.o"; 130 }; 131 132 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles, 133 options::OPT_shared)) { 134 CmdArgs.push_back( 135 Args.MakeArgString(ToolChain.GetFilePath(getCrt0Basename()))); 136 137 CmdArgs.push_back(Args.MakeArgString( 138 ToolChain.GetFilePath(IsArch32Bit ? "crti.o" : "crti_64.o"))); 139 } 140 141 // Collect all static constructor and destructor functions in both C and CXX 142 // language link invocations. This has to come before AddLinkerInputs as the 143 // implied option needs to precede any other '-bcdtors' settings or 144 // '-bnocdtors' that '-Wl' might forward. 145 CmdArgs.push_back("-bcdtors:all:0:s"); 146 147 // Specify linker input file(s). 148 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA); 149 150 // Add directory to library search path. 151 Args.AddAllArgs(CmdArgs, options::OPT_L); 152 ToolChain.AddFilePathLibArgs(Args, CmdArgs); 153 ToolChain.addProfileRTLibs(Args, CmdArgs); 154 155 if (getToolChain().ShouldLinkCXXStdlib(Args)) 156 getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs); 157 158 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) { 159 AddRunTimeLibs(ToolChain, D, CmdArgs, Args); 160 161 // Support POSIX threads if "-pthreads" or "-pthread" is present. 162 if (Args.hasArg(options::OPT_pthreads, options::OPT_pthread)) 163 CmdArgs.push_back("-lpthreads"); 164 165 if (D.CCCIsCXX()) 166 CmdArgs.push_back("-lm"); 167 168 CmdArgs.push_back("-lc"); 169 } 170 171 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath()); 172 C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(), 173 Exec, CmdArgs, Inputs, Output)); 174 } 175 176 /// AIX - AIX tool chain which can call as(1) and ld(1) directly. 177 AIX::AIX(const Driver &D, const llvm::Triple &Triple, const ArgList &Args) 178 : ToolChain(D, Triple, Args) { 179 getFilePaths().push_back(getDriver().SysRoot + "/usr/lib"); 180 } 181 182 // Returns the effective header sysroot path to use. 183 // This comes from either -isysroot or --sysroot. 184 llvm::StringRef 185 AIX::GetHeaderSysroot(const llvm::opt::ArgList &DriverArgs) const { 186 if (DriverArgs.hasArg(options::OPT_isysroot)) 187 return DriverArgs.getLastArgValue(options::OPT_isysroot); 188 if (!getDriver().SysRoot.empty()) 189 return getDriver().SysRoot; 190 return "/"; 191 } 192 193 void AIX::AddClangSystemIncludeArgs(const ArgList &DriverArgs, 194 ArgStringList &CC1Args) const { 195 // Return if -nostdinc is specified as a driver option. 196 if (DriverArgs.hasArg(options::OPT_nostdinc)) 197 return; 198 199 llvm::StringRef Sysroot = GetHeaderSysroot(DriverArgs); 200 const Driver &D = getDriver(); 201 202 // Add the Clang builtin headers (<resource>/include). 203 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) { 204 SmallString<128> P(D.ResourceDir); 205 path::append(P, "/include"); 206 addSystemInclude(DriverArgs, CC1Args, P.str()); 207 } 208 209 // Return if -nostdlibinc is specified as a driver option. 210 if (DriverArgs.hasArg(options::OPT_nostdlibinc)) 211 return; 212 213 // Add <sysroot>/usr/include. 214 SmallString<128> UP(Sysroot); 215 path::append(UP, "/usr/include"); 216 addSystemInclude(DriverArgs, CC1Args, UP.str()); 217 } 218 219 void AIX::AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args, 220 llvm::opt::ArgStringList &CmdArgs) const { 221 switch (GetCXXStdlibType(Args)) { 222 case ToolChain::CST_Libcxx: 223 CmdArgs.push_back("-lc++"); 224 return; 225 case ToolChain::CST_Libstdcxx: 226 llvm::report_fatal_error("linking libstdc++ unimplemented on AIX"); 227 } 228 229 llvm_unreachable("Unexpected C++ library type; only libc++ is supported."); 230 } 231 232 ToolChain::CXXStdlibType AIX::GetDefaultCXXStdlibType() const { 233 return ToolChain::CST_Libcxx; 234 } 235 236 ToolChain::RuntimeLibType AIX::GetDefaultRuntimeLibType() const { 237 return ToolChain::RLT_CompilerRT; 238 } 239 240 auto AIX::buildAssembler() const -> Tool * { return new aix::Assembler(*this); } 241 242 auto AIX::buildLinker() const -> Tool * { return new aix::Linker(*this); } 243