1 //===--- CloudABI.cpp - CloudABI ToolChain Implementations ------*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 #include "InputInfo.h"
12 #include "CommonArgs.h"
13 #include "clang/Driver/Compilation.h"
14 #include "clang/Driver/Driver.h"
15 #include "clang/Driver/Options.h"
16 #include "llvm/ADT/SmallString.h"
17 #include "llvm/Option/ArgList.h"
18 #include "llvm/Support/Path.h"
20 using namespace clang::driver;
21 using namespace clang::driver::tools;
22 using namespace clang::driver::toolchains;
23 using namespace clang;
24 using namespace llvm::opt;
26 void cloudabi::Linker::ConstructJob(Compilation &C, const JobAction &JA,
27 const InputInfo &Output,
28 const InputInfoList &Inputs,
30 const char *LinkingOutput) const {
31 const ToolChain &ToolChain = getToolChain();
32 const Driver &D = ToolChain.getDriver();
33 ArgStringList CmdArgs;
35 // Silence warning for "clang -g foo.o -o foo"
36 Args.ClaimAllArgs(options::OPT_g_Group);
37 // and "clang -emit-llvm foo.o -o foo"
38 Args.ClaimAllArgs(options::OPT_emit_llvm);
39 // and for "clang -w foo.o -o foo". Other warning options are already
40 // handled somewhere else.
41 Args.ClaimAllArgs(options::OPT_w);
43 if (!D.SysRoot.empty())
44 CmdArgs.push_back(Args.MakeArgString("--sysroot=" + D.SysRoot));
46 // CloudABI only supports static linkage.
47 CmdArgs.push_back("-Bstatic");
48 CmdArgs.push_back("--no-dynamic-linker");
50 // Provide PIE linker flags in case PIE is default for the architecture.
51 if (ToolChain.isPIEDefault()) {
52 CmdArgs.push_back("-pie");
53 CmdArgs.push_back("-zrelro");
56 CmdArgs.push_back("--eh-frame-hdr");
57 CmdArgs.push_back("--gc-sections");
59 if (Output.isFilename()) {
60 CmdArgs.push_back("-o");
61 CmdArgs.push_back(Output.getFilename());
63 assert(Output.isNothing() && "Invalid output.");
66 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles)) {
67 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
68 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtbegin.o")));
71 Args.AddAllArgs(CmdArgs, options::OPT_L);
72 ToolChain.AddFilePathLibArgs(Args, CmdArgs);
73 Args.AddAllArgs(CmdArgs,
74 {options::OPT_T_Group, options::OPT_e, options::OPT_s,
75 options::OPT_t, options::OPT_Z_Flag, options::OPT_r});
78 assert(!Inputs.empty() && "Must have at least one input.");
79 AddGoldPlugin(ToolChain, Args, CmdArgs, Output, Inputs[0],
80 D.getLTOMode() == LTOK_Thin);
83 AddLinkerInputs(ToolChain, Inputs, Args, CmdArgs, JA);
85 if (ToolChain.ShouldLinkCXXStdlib(Args))
86 ToolChain.AddCXXStdlibLibArgs(Args, CmdArgs);
87 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nodefaultlibs)) {
88 CmdArgs.push_back("-lc");
89 CmdArgs.push_back("-lcompiler_rt");
92 if (!Args.hasArg(options::OPT_nostdlib, options::OPT_nostartfiles))
93 CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crtend.o")));
95 const char *Exec = Args.MakeArgString(ToolChain.GetLinkerPath());
96 C.addCommand(llvm::make_unique<Command>(JA, *this, Exec, CmdArgs, Inputs));
99 // CloudABI - CloudABI tool chain which can call ld(1) directly.
101 CloudABI::CloudABI(const Driver &D, const llvm::Triple &Triple,
103 : Generic_ELF(D, Triple, Args) {
104 SmallString<128> P(getDriver().Dir);
105 llvm::sys::path::append(P, "..", getTriple().str(), "lib");
106 getFilePaths().push_back(P.str());
109 void CloudABI::addLibCxxIncludePaths(const llvm::opt::ArgList &DriverArgs,
110 llvm::opt::ArgStringList &CC1Args) const {
111 SmallString<128> P(getDriver().Dir);
112 llvm::sys::path::append(P, "..", getTriple().str(), "include/c++/v1");
113 addSystemInclude(DriverArgs, CC1Args, P.str());
116 void CloudABI::AddCXXStdlibLibArgs(const ArgList &Args,
117 ArgStringList &CmdArgs) const {
118 CmdArgs.push_back("-lc++");
119 CmdArgs.push_back("-lc++abi");
120 CmdArgs.push_back("-lunwind");
123 Tool *CloudABI::buildLinker() const {
124 return new tools::cloudabi::Linker(*this);
127 bool CloudABI::isPIEDefault() const {
128 // Only enable PIE on architectures that support PC-relative
129 // addressing. PC-relative addressing is required, as the process
130 // startup code must be able to relocate itself.
131 switch (getTriple().getArch()) {
132 case llvm::Triple::aarch64:
133 case llvm::Triple::x86_64:
140 SanitizerMask CloudABI::getSupportedSanitizers() const {
141 SanitizerMask Res = ToolChain::getSupportedSanitizers();
142 Res |= SanitizerKind::SafeStack;
146 SanitizerMask CloudABI::getDefaultSanitizers() const {
147 return SanitizerKind::SafeStack;