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      1 //===--- Ananas.cpp - Ananas 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 "Ananas.h"
     10 #include "InputInfo.h"
     11 #include "CommonArgs.h"
     12 #include "clang/Driver/Compilation.h"
     13 #include "clang/Driver/Driver.h"
     14 #include "clang/Driver/Options.h"
     15 #include "llvm/ADT/SmallString.h"
     16 #include "llvm/Option/ArgList.h"
     17 #include "llvm/Support/Path.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 ananas::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   Args.AddAllArgValues(CmdArgs, options::OPT_Wa_COMMA, options::OPT_Xassembler);
     34 
     35   CmdArgs.push_back("-o");
     36   CmdArgs.push_back(Output.getFilename());
     37 
     38   for (const auto &II : Inputs)
     39     CmdArgs.push_back(II.getFilename());
     40 
     41   const char *Exec = Args.MakeArgString(getToolChain().GetProgramPath("as"));
     42   C.addCommand(std::make_unique<Command>(JA, *this,
     43                                          ResponseFileSupport::AtFileCurCP(),
     44                                          Exec, CmdArgs, Inputs, Output));
     45 }
     46 
     47 void ananas::Linker::ConstructJob(Compilation &C, const JobAction &JA,
     48                                   const InputInfo &Output,
     49                                   const InputInfoList &Inputs,
     50                                   const ArgList &Args,
     51                                   const char *LinkingOutput) const {
     52   const ToolChain &ToolChain = getToolChain();
     53   const Driver &D = ToolChain.getDriver();
     54   ArgStringList CmdArgs;
     55 
     56   // Silence warning for "clang -g foo.o -o foo"
     57   Args.ClaimAllArgs(options::OPT_g_Group);
     58   // and "clang -emit-llvm foo.o -o foo"
     59   Args.ClaimAllArgs(options::OPT_emit_llvm);
     60   // and for "clang -w foo.o -o foo". Other warning options are already
     61   // handled somewhere else.
     62   Args.ClaimAllArgs(options::OPT_w);
     63 
     64   if (!D.SysRoot.empty())
     65     CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
     66 
     67   if (Args.hasArg(options::OPT_static)) {
     68     CmdArgs.push_back("-Bstatic");
     69   } else {
     70     if (Args.hasArg(options::OPT_rdynamic))
     71       CmdArgs.push_back("-export-dynamic");
     72     if (Args.hasArg(options::OPT_shared)) {
     73       CmdArgs.push_back("-Bshareable");
     74     } else {
     75       Args.AddAllArgs(CmdArgs, options::OPT_pie);
     76       CmdArgs.push_back("-dynamic-linker");
     77       CmdArgs.push_back("/lib/ld-ananas.so");
     78     }
     79   }
     80 
     81   if (Output.isFilename()) {
     82     CmdArgs.push_back("-o");
     83     CmdArgs.push_back(Output.getFilename());
     84   } else {
     85     assert(Output.isNothing() && "Invalid output.");
     86   }
     87 
     88   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
     89     if (!Args.hasArg(options::OPT_shared)) {
     90       CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
     91     }
     92     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crti.o")));
     93     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie)) {
     94       CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbeginS.o")));
     95     } else {
     96       CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
     97     }
     98   }
     99 
    100   Args.AddAllArgs(CmdArgs, options::OPT_L);
    101   ToolChain.AddFilePathLibArgs(Args, CmdArgs);
    102   Args.AddAllArgs(CmdArgs,
    103                   {options::OPT_T_Group, options::OPT_e, options::OPT_s,
    104                    options::OPT_t, options::OPT_Z_Flag, options::OPT_r});
    105 
    106   if (D.isUsingLTO()) {
    107     assert(!Inputs.empty() && "Must have at least one input.");
    108     addLTOOptions(ToolChain, Args, CmdArgs, Output, Inputs[0],
    109                   D.getLTOMode() == LTOK_Thin);
    110   }
    111 
    112   AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
    113 
    114   if (ToolChain.ShouldLinkCXXStdlib(Args))
    115     ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
    116   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs))
    117     CmdArgs.push_back("-lc");
    118 
    119   if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
    120     if (Args.hasArg(options::OPT_shared) || Args.hasArg(options::OPT_pie))
    121       CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtendS.o")));
    122     else
    123       CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
    124     CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtn.o")));
    125   }
    126 
    127   const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
    128   C.addCommand(std::make_unique<Command>(JA, *this,
    129                                          ResponseFileSupport::AtFileCurCP(),
    130                                          Exec, CmdArgs, Inputs, Output));
    131 }
    132 
    133 // Ananas - Ananas tool chain which can call as(1) and ld(1) directly.
    134 
    135 Ananas::Ananas(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
    136     : Generic_ELF(D, Triple, Args) {
    137   getFilePaths().push_back(getDriver().SysRoot + "/usr/lib");
    138 }
    139 
    140 Tool *Ananas::buildAssembler() const {
    141   return new tools::ananas::Assembler(*this);
    142 }
    143 
    144 Tool *Ananas::buildLinker() const { return new tools::ananas::Linker(*this); }
    145