1317019Sdim//===--- CloudABI.cpp - CloudABI ToolChain Implementations ------*- C++ -*-===// 2317019Sdim// 3353358Sdim// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4353358Sdim// See https://llvm.org/LICENSE.txt for license information. 5353358Sdim// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6317019Sdim// 7317019Sdim//===----------------------------------------------------------------------===// 8317019Sdim 9317019Sdim#include "CloudABI.h" 10317019Sdim#include "InputInfo.h" 11317019Sdim#include "CommonArgs.h" 12317019Sdim#include "clang/Driver/Compilation.h" 13317019Sdim#include "clang/Driver/Driver.h" 14317019Sdim#include "clang/Driver/Options.h" 15317019Sdim#include "llvm/ADT/SmallString.h" 16317019Sdim#include "llvm/Option/ArgList.h" 17317019Sdim#include "llvm/Support/Path.h" 18317019Sdim 19317019Sdimusing namespace clang::driver; 20317019Sdimusing namespace clang::driver::tools; 21317019Sdimusing namespace clang::driver::toolchains; 22317019Sdimusing namespace clang; 23317019Sdimusing namespace llvm::opt; 24317019Sdim 25317019Sdimvoid cloudabi::Linker::ConstructJob(Compilation &C, const JobAction &JA, 26317019Sdim const InputInfo &Output, 27317019Sdim const InputInfoList &Inputs, 28317019Sdim const ArgList &Args, 29317019Sdim const char *LinkingOutput) const { 30317019Sdim const ToolChain &ToolChain = getToolChain(); 31317019Sdim const Driver &D = ToolChain.getDriver(); 32317019Sdim ArgStringList CmdArgs; 33317019Sdim 34317019Sdim // Silence warning for "clang -g foo.o -o foo" 35317019Sdim Args.ClaimAllArgs(options::OPT_g_Group); 36317019Sdim // and "clang -emit-llvm foo.o -o foo" 37317019Sdim Args.ClaimAllArgs(options::OPT_emit_llvm); 38317019Sdim // and for "clang -w foo.o -o foo". Other warning options are already 39317019Sdim // handled somewhere else. 40317019Sdim Args.ClaimAllArgs(options::OPT_w); 41317019Sdim 42317019Sdim if (!D.SysRoot.empty()) 43317019Sdim CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot)); 44317019Sdim 45317019Sdim // CloudABI only supports static linkage. 46317019Sdim CmdArgs.push_back("-Bstatic"); 47317019Sdim CmdArgs.push_back("--no-dynamic-linker"); 48317019Sdim 49317019Sdim // Provide PIE linker flags in case PIE is default for the architecture. 50317019Sdim if (ToolChain.isPIEDefault()) { 51317019Sdim CmdArgs.push_back("-pie"); 52317019Sdim CmdArgs.push_back("-zrelro"); 53317019Sdim } 54317019Sdim 55317019Sdim CmdArgs.push_back("--eh-frame-hdr"); 56317019Sdim CmdArgs.push_back("--gc-sections"); 57317019Sdim 58317019Sdim if (Output.isFilename()) { 59317019Sdim CmdArgs.push_back("-o"); 60317019Sdim CmdArgs.push_back(Output.getFilename()); 61317019Sdim } else { 62317019Sdim assert(Output.isNothing() && "Invalid output."); 63317019Sdim } 64317019Sdim 65317019Sdim if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) { 66317019Sdim CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o"))); 67317019Sdim CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o"))); 68317019Sdim } 69317019Sdim 70317019Sdim Args.AddAllArgs(CmdArgs, options::OPT_L); 71317019Sdim ToolChain.AddFilePathLibArgs(Args, CmdArgs); 72317019Sdim Args.AddAllArgs(CmdArgs, 73317019Sdim {options::OPT_T_Group, options::OPT_e, options::OPT_s, 74317019Sdim options::OPT_t, options::OPT_Z_Flag, options::OPT_r}); 75317019Sdim 76341825Sdim if (D.isUsingLTO()) { 77341825Sdim assert(!Inputs.empty() && "Must have at least one input."); 78341825Sdim AddGoldPlugin(ToolChain, Args, CmdArgs, Output, Inputs[0], 79341825Sdim D.getLTOMode() == LTOK_Thin); 80341825Sdim } 81317019Sdim 82317019Sdim AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA); 83317019Sdim 84327952Sdim if (ToolChain.ShouldLinkCXXStdlib(Args)) 85327952Sdim ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs); 86317019Sdim if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) { 87317019Sdim CmdArgs.push_back("-lc"); 88317019Sdim CmdArgs.push_back("-lcompiler_rt"); 89317019Sdim } 90317019Sdim 91317019Sdim if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) 92317019Sdim CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o"))); 93317019Sdim 94317019Sdim const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath()); 95360784Sdim C.addCommand(std::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs)); 96317019Sdim} 97317019Sdim 98317019Sdim// CloudABI - CloudABI tool chain which can call ld(1) directly. 99317019Sdim 100317019SdimCloudABI::CloudABI(const Driver &D, const llvm::Triple &Triple, 101317019Sdim const ArgList &Args) 102317019Sdim : Generic_ELF(D, Triple, Args) { 103317019Sdim SmallString<128> P(getDriver().Dir); 104317019Sdim llvm::sys::path::append(P, "..", getTriple().str(), "lib"); 105317019Sdim getFilePaths().push_back(P.str()); 106317019Sdim} 107317019Sdim 108341825Sdimvoid CloudABI::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, 109341825Sdim llvm::opt::ArgStringList &CC1Args) const { 110317019Sdim SmallString<128> P(getDriver().Dir); 111317019Sdim llvm::sys::path::append(P, "..", getTriple().str(), "include/c++/v1"); 112341825Sdim addSystemInclude(DriverArgs, CC1Args, P.str()); 113317019Sdim} 114317019Sdim 115317019Sdimvoid CloudABI::AddCXXStdlibLibArgs(const ArgList &Args, 116317019Sdim ArgStringList &CmdArgs) const { 117317019Sdim CmdArgs.push_back("-lc++"); 118317019Sdim CmdArgs.push_back("-lc++abi"); 119317019Sdim CmdArgs.push_back("-lunwind"); 120317019Sdim} 121317019Sdim 122317019SdimTool *CloudABI::buildLinker() const { 123317019Sdim return new tools::cloudabi::Linker(*this); 124317019Sdim} 125317019Sdim 126317019Sdimbool CloudABI::isPIEDefault() const { 127317019Sdim // Only enable PIE on architectures that support PC-relative 128317019Sdim // addressing. PC-relative addressing is required, as the process 129317019Sdim // startup code must be able to relocate itself. 130317019Sdim switch (getTriple().getArch()) { 131317019Sdim case llvm::Triple::aarch64: 132317019Sdim case llvm::Triple::x86_64: 133317019Sdim return true; 134317019Sdim default: 135317019Sdim return false; 136317019Sdim } 137317019Sdim} 138317019Sdim 139317019SdimSanitizerMask CloudABI::getSupportedSanitizers() const { 140317019Sdim SanitizerMask Res = ToolChain::getSupportedSanitizers(); 141317019Sdim Res |= SanitizerKind::SafeStack; 142317019Sdim return Res; 143317019Sdim} 144317019Sdim 145317019SdimSanitizerMask CloudABI::getDefaultSanitizers() const { 146317019Sdim return SanitizerKind::SafeStack; 147317019Sdim} 148