| //===--- CloudABI.cpp - CloudABI ToolChain Implementations ------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "CloudABI.h" |
| #include "CommonArgs.h" |
| #include "clang/Driver/Compilation.h" |
| #include "clang/Driver/Driver.h" |
| #include "clang/Driver/InputInfo.h" |
| #include "clang/Driver/Options.h" |
| #include "llvm/ADT/SmallString.h" |
| #include "llvm/Option/ArgList.h" |
| #include "llvm/Support/Path.h" |
| |
| using namespace clang::driver; |
| using namespace clang::driver::tools; |
| using namespace clang::driver::toolchains; |
| using namespace clang; |
| using namespace llvm::opt; |
| |
| void cloudabi::Linker::ConstructJob(Compilation &C, const JobAction &JA, |
| const InputInfo &Output, |
| const InputInfoList &Inputs, |
| const ArgList &Args, |
| const char *LinkingOutput) const { |
| const ToolChain &ToolChain = getToolChain(); |
| const Driver &D = ToolChain.getDriver(); |
| ArgStringList CmdArgs; |
| |
| // Silence warning for "clang -g foo.o -o foo" |
| Args.ClaimAllArgs(options::OPT_g_Group); |
| // and "clang -emit-llvm foo.o -o foo" |
| Args.ClaimAllArgs(options::OPT_emit_llvm); |
| // and for "clang -w foo.o -o foo". Other warning options are already |
| // handled somewhere else. |
| Args.ClaimAllArgs(options::OPT_w); |
| |
| if (!D.SysRoot.empty()) |
| CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot)); |
| |
| // CloudABI only supports static linkage. |
| CmdArgs.push_back("-Bstatic"); |
| CmdArgs.push_back("--no-dynamic-linker"); |
| |
| // Provide PIE linker flags in case PIE is default for the architecture. |
| if (ToolChain.isPIEDefault(Args)) { |
| CmdArgs.push_back("-pie"); |
| CmdArgs.push_back("-zrelro"); |
| } |
| |
| CmdArgs.push_back("--eh-frame-hdr"); |
| CmdArgs.push_back("--gc-sections"); |
| |
| if (Output.isFilename()) { |
| CmdArgs.push_back("-o"); |
| CmdArgs.push_back(Output.getFilename()); |
| } else { |
| assert(Output.isNothing() && "Invalid output."); |
| } |
| |
| if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) { |
| CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o"))); |
| CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o"))); |
| } |
| |
| Args.AddAllArgs(CmdArgs, options::OPT_L); |
| ToolChain.AddFilePathLibArgs(Args, CmdArgs); |
| Args.AddAllArgs(CmdArgs, |
| {options::OPT_T_Group, options::OPT_e, options::OPT_s, |
| options::OPT_t, options::OPT_Z_Flag, options::OPT_r}); |
| |
| if (D.isUsingLTO()) { |
| assert(!Inputs.empty() && "Must have at least one input."); |
| addLTOOptions(ToolChain, Args, CmdArgs, Output, Inputs[0], |
| D.getLTOMode() == LTOK_Thin); |
| } |
| |
| AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA); |
| |
| if (ToolChain.ShouldLinkCXXStdlib(Args)) |
| ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs); |
| if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) { |
| CmdArgs.push_back("-lc"); |
| CmdArgs.push_back("-lcompiler_rt"); |
| } |
| |
| if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) |
| CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o"))); |
| |
| const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath()); |
| C.addCommand(std::make_unique<Command>(JA, *this, |
| ResponseFileSupport::AtFileCurCP(), |
| Exec, CmdArgs, Inputs, Output)); |
| } |
| |
| // CloudABI - CloudABI tool chain which can call ld(1) directly. |
| |
| CloudABI::CloudABI(const Driver &D, const llvm::Triple &Triple, |
| const ArgList &Args) |
| : Generic_ELF(D, Triple, Args) { |
| SmallString<128> P(getDriver().Dir); |
| llvm::sys::path::append(P, "..", getTriple().str(), "lib"); |
| getFilePaths().push_back(std::string(P.str())); |
| } |
| |
| void CloudABI::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs, |
| llvm::opt::ArgStringList &CC1Args) const { |
| SmallString<128> P(getDriver().Dir); |
| llvm::sys::path::append(P, "..", getTriple().str(), "include/c++/v1"); |
| addSystemInclude(DriverArgs, CC1Args, P.str()); |
| } |
| |
| void CloudABI::AddCXXStdlibLibArgs(const ArgList &Args, |
| ArgStringList &CmdArgs) const { |
| CmdArgs.push_back("-lc++"); |
| CmdArgs.push_back("-lc++abi"); |
| CmdArgs.push_back("-lunwind"); |
| } |
| |
| Tool *CloudABI::buildLinker() const { |
| return new tools::cloudabi::Linker(*this); |
| } |
| |
| bool CloudABI::isPIEDefault(const llvm::opt::ArgList &Args) const { |
| // Only enable PIE on architectures that support PC-relative |
| // addressing. PC-relative addressing is required, as the process |
| // startup code must be able to relocate itself. |
| switch (getTriple().getArch()) { |
| case llvm::Triple::aarch64: |
| case llvm::Triple::x86_64: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| SanitizerMask CloudABI::getSupportedSanitizers() const { |
| SanitizerMask Res = ToolChain::getSupportedSanitizers(); |
| Res |= SanitizerKind::SafeStack; |
| return Res; |
| } |
| |
| SanitizerMask CloudABI::getDefaultSanitizers() const { |
| return SanitizerKind::SafeStack; |
| } |