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1 //===--- AIX.cpp - AIX ToolChain Implementations ----------------*- C++ -*-===//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8
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9 #include "AIX.h"
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10 #include "Arch/PPC.h"
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11 #include "CommonArgs.h"
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12 #include "clang/Driver/Compilation.h"
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13 #include "clang/Driver/Options.h"
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14 #include "clang/Driver/SanitizerArgs.h"
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15 #include "llvm/Option/ArgList.h"
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221
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16 #include "llvm/Support/Path.h"
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150
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17
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18 using AIX = clang::driver::toolchains::AIX;
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19 using namespace clang::driver;
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20 using namespace clang::driver::tools;
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221
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21 using namespace clang::driver::toolchains;
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150
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22
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23 using namespace llvm::opt;
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221
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24 using namespace llvm::sys;
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150
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25
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26 void aix::Assembler::ConstructJob(Compilation &C, const JobAction &JA,
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27 const InputInfo &Output,
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28 const InputInfoList &Inputs,
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29 const ArgList &Args,
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30 const char *LinkingOutput) const {
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31 ArgStringList CmdArgs;
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32
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33 const bool IsArch32Bit = getToolChain().getTriple().isArch32Bit();
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34 const bool IsArch64Bit = getToolChain().getTriple().isArch64Bit();
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35 // Only support 32 and 64 bit.
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36 if (!IsArch32Bit && !IsArch64Bit)
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37 llvm_unreachable("Unsupported bit width value.");
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38
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39 // Specify the mode in which the as(1) command operates.
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40 if (IsArch32Bit) {
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41 CmdArgs.push_back("-a32");
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42 } else {
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43 // Must be 64-bit, otherwise asserted already.
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44 CmdArgs.push_back("-a64");
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45 }
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46
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47 // Accept any mixture of instructions.
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48 // On Power for AIX and Linux, this behaviour matches that of GCC for both the
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49 // user-provided assembler source case and the compiler-produced assembler
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50 // source case. Yet XL with user-provided assembler source would not add this.
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51 CmdArgs.push_back("-many");
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52
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53 Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
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54
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55 // Specify assembler output file.
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56 assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
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57 if (Output.isFilename()) {
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58 CmdArgs.push_back("-o");
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59 CmdArgs.push_back(Output.getFilename());
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60 }
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61
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62 // Specify assembler input file.
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63 // The system assembler on AIX takes exactly one input file. The driver is
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64 // expected to invoke as(1) separately for each assembler source input file.
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65 if (Inputs.size() != 1)
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66 llvm_unreachable("Invalid number of input files.");
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67 const InputInfo &II = Inputs[0];
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68 assert((II.isFilename() || II.isNothing()) && "Invalid input.");
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69 if (II.isFilename())
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70 CmdArgs.push_back(II.getFilename());
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71
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72 const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
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221
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73 C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
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74 Exec, CmdArgs, Inputs, Output));
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150
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75 }
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76
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77 void aix::Linker::ConstructJob(Compilation &C, const JobAction &JA,
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78 const InputInfo &Output,
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79 const InputInfoList &Inputs, const ArgList &Args,
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80 const char *LinkingOutput) const {
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81 const AIX &ToolChain = static_cast<const AIX &>(getToolChain());
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221
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82 const Driver &D = ToolChain.getDriver();
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150
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83 ArgStringList CmdArgs;
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84
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85 const bool IsArch32Bit = ToolChain.getTriple().isArch32Bit();
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86 const bool IsArch64Bit = ToolChain.getTriple().isArch64Bit();
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87 // Only support 32 and 64 bit.
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88 if (!(IsArch32Bit || IsArch64Bit))
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89 llvm_unreachable("Unsupported bit width value.");
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90
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91 // Force static linking when "-static" is present.
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92 if (Args.hasArg(options::OPT_static))
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93 CmdArgs.push_back("-bnso");
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94
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221
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95 // Add options for shared libraries.
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96 if (Args.hasArg(options::OPT_shared)) {
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97 CmdArgs.push_back("-bM:SRE");
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98 CmdArgs.push_back("-bnoentry");
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99 }
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100
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150
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101 // Specify linker output file.
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102 assert((Output.isFilename() || Output.isNothing()) && "Invalid output.");
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103 if (Output.isFilename()) {
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104 CmdArgs.push_back("-o");
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105 CmdArgs.push_back(Output.getFilename());
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106 }
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107
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108 // Set linking mode (i.e., 32/64-bit) and the address of
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109 // text and data sections based on arch bit width.
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110 if (IsArch32Bit) {
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111 CmdArgs.push_back("-b32");
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112 CmdArgs.push_back("-bpT:0x10000000");
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113 CmdArgs.push_back("-bpD:0x20000000");
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114 } else {
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115 // Must be 64-bit, otherwise asserted already.
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116 CmdArgs.push_back("-b64");
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117 CmdArgs.push_back("-bpT:0x100000000");
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118 CmdArgs.push_back("-bpD:0x110000000");
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119 }
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120
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121 auto getCrt0Basename = [&Args, IsArch32Bit] {
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122 // Enable gprofiling when "-pg" is specified.
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123 if (Args.hasArg(options::OPT_pg))
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124 return IsArch32Bit ? "gcrt0.o" : "gcrt0_64.o";
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125 // Enable profiling when "-p" is specified.
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126 else if (Args.hasArg(options::OPT_p))
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127 return IsArch32Bit ? "mcrt0.o" : "mcrt0_64.o";
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128 else
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129 return IsArch32Bit ? "crt0.o" : "crt0_64.o";
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130 };
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131
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221
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132 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles,
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133 options::OPT_shared)) {
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134 CmdArgs.push_back(
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135 Args.MakeArgString(ToolChain.GetFilePath(getCrt0Basename())));
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221
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136
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137 CmdArgs.push_back(Args.MakeArgString(
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138 ToolChain.GetFilePath(IsArch32Bit ? "crti.o" : "crti_64.o")));
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150
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139 }
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140
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221
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141 // Collect all static constructor and destructor functions in both C and CXX
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142 // language link invocations. This has to come before AddLinkerInputs as the
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143 // implied option needs to precede any other '-bcdtors' settings or
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144 // '-bnocdtors' that '-Wl' might forward.
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145 CmdArgs.push_back("-bcdtors:all:0:s");
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146
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150
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147 // Specify linker input file(s).
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148 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
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149
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150 // Add directory to library search path.
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151 Args.AddAllArgs(CmdArgs, options::OPT_L);
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152 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
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221
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153 ToolChain.addProfileRTLibs(Args, CmdArgs);
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154
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155 if (getToolChain().ShouldLinkCXXStdlib(Args))
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156 getToolChain().AddCXXStdlibLibArgs(Args, CmdArgs);
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150
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157
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158 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
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221
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159 AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
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160
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150
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161 // Support POSIX threads if "-pthreads" or "-pthread" is present.
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162 if (Args.hasArg(options::OPT_pthreads, options::OPT_pthread))
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163 CmdArgs.push_back("-lpthreads");
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164
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221
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165 if (D.CCCIsCXX())
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166 CmdArgs.push_back("-lm");
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167
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168 CmdArgs.push_back("-lc");
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169 }
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170
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171 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
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172 C.addCommand(std::make_unique<Command>(JA, *this, ResponseFileSupport::None(),
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173 Exec, CmdArgs, Inputs, Output));
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150
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174 }
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175
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176 /// AIX - AIX tool chain which can call as(1) and ld(1) directly.
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177 AIX::AIX(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
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178 : ToolChain(D, Triple, Args) {
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221
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179 getLibraryPaths().push_back(getDriver().SysRoot + "/usr/lib");
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180 }
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181
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182 // Returns the effective header sysroot path to use.
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183 // This comes from either -isysroot or --sysroot.
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184 llvm::StringRef
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185 AIX::GetHeaderSysroot(const llvm::opt::ArgList &DriverArgs) const {
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186 if (DriverArgs.hasArg(options::OPT_isysroot))
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187 return DriverArgs.getLastArgValue(options::OPT_isysroot);
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188 if (!getDriver().SysRoot.empty())
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189 return getDriver().SysRoot;
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190 return "/";
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191 }
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192
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193 void AIX::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
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194 ArgStringList &CC1Args) const {
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195 // Return if -nostdinc is specified as a driver option.
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196 if (DriverArgs.hasArg(options::OPT_nostdinc))
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197 return;
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198
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199 llvm::StringRef Sysroot = GetHeaderSysroot(DriverArgs);
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200 const Driver &D = getDriver();
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201
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202 // Add the Clang builtin headers (<resource>/include).
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203 if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
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204 SmallString<128> P(D.ResourceDir);
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205 path::append(P, "/include");
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206 addSystemInclude(DriverArgs, CC1Args, P.str());
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207 }
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208
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209 // Return if -nostdlibinc is specified as a driver option.
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210 if (DriverArgs.hasArg(options::OPT_nostdlibinc))
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211 return;
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212
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213 // Add <sysroot>/usr/include.
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214 SmallString<128> UP(Sysroot);
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215 path::append(UP, "/usr/include");
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216 addSystemInclude(DriverArgs, CC1Args, UP.str());
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217 }
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218
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219 void AIX::AddCXXStdlibLibArgs(const llvm::opt::ArgList &Args,
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220 llvm::opt::ArgStringList &CmdArgs) const {
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221 switch (GetCXXStdlibType(Args)) {
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222 case ToolChain::CST_Libcxx:
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223 CmdArgs.push_back("-lc++");
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224 CmdArgs.push_back("-lc++abi");
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225 return;
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226 case ToolChain::CST_Libstdcxx:
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227 llvm::report_fatal_error("linking libstdc++ unimplemented on AIX");
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228 }
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229
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230 llvm_unreachable("Unexpected C++ library type; only libc++ is supported.");
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231 }
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232
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233 ToolChain::CXXStdlibType AIX::GetDefaultCXXStdlibType() const {
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234 return ToolChain::CST_Libcxx;
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235 }
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236
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237 ToolChain::RuntimeLibType AIX::GetDefaultRuntimeLibType() const {
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238 return ToolChain::RLT_CompilerRT;
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150
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239 }
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240
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241 auto AIX::buildAssembler() const -> Tool * { return new aix::Assembler(*this); }
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242
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243 auto AIX::buildLinker() const -> Tool * { return new aix::Linker(*this); }
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