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//===----------------------------------------------------------------------===//
//
// 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 "Managarm.h"
#include "Arch/RISCV.h"
#include "clang/Config/config.h"
#include "clang/Driver/CommonArgs.h"
#include "clang/Driver/Driver.h"
#include "clang/Driver/Options.h"
#include "clang/Driver/SanitizerArgs.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/Path.h"
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang;
using namespace llvm::opt;
using tools::addPathIfExists;
std::string Managarm::getMultiarchTriple(const Driver &D,
const llvm::Triple &TargetTriple,
StringRef SysRoot) const {
switch (TargetTriple.getArch()) {
default:
return TargetTriple.str();
case llvm::Triple::x86_64:
return "x86_64-managarm-" + TargetTriple.getEnvironmentName().str();
case llvm::Triple::aarch64:
return "aarch64-managarm-" + TargetTriple.getEnvironmentName().str();
case llvm::Triple::riscv64:
return "riscv64-managarm-" + TargetTriple.getEnvironmentName().str();
}
}
static StringRef getOSLibDir(const llvm::Triple &Triple, const ArgList &Args) {
// It happens that only x86, PPC and SPARC use the 'lib32' variant of
// oslibdir, and using that variant while targeting other architectures causes
// problems because the libraries are laid out in shared system roots that
// can't cope with a 'lib32' library search path being considered. So we only
// enable them when we know we may need it.
//
// FIXME: This is a bit of a hack. We should really unify this code for
// reasoning about oslibdir spellings with the lib dir spellings in the
// GCCInstallationDetector, but that is a more significant refactoring.
if (Triple.getArch() == llvm::Triple::x86 || Triple.isPPC32() ||
Triple.getArch() == llvm::Triple::sparc)
return "lib32";
if (Triple.getArch() == llvm::Triple::x86_64 && Triple.isX32())
return "libx32";
if (Triple.getArch() == llvm::Triple::riscv32)
return "lib32";
return Triple.isArch32Bit() ? "lib" : "lib64";
}
Managarm::Managarm(const Driver &D, const llvm::Triple &Triple,
const ArgList &Args)
: Generic_ELF(D, Triple, Args) {
GCCInstallation.init(Triple, Args);
Multilibs = GCCInstallation.getMultilibs();
SelectedMultilibs.assign({GCCInstallation.getMultilib()});
std::string SysRoot = computeSysRoot();
ToolChain::path_list &PPaths = getProgramPaths();
Generic_GCC::PushPPaths(PPaths);
#ifdef ENABLE_LINKER_BUILD_ID
ExtraOpts.push_back("--build-id");
#endif
// The selection of paths to try here is designed to match the patterns which
// the GCC driver itself uses, as this is part of the GCC-compatible driver.
// This was determined by running GCC in a fake filesystem, creating all
// possible permutations of these directories, and seeing which ones it added
// to the link paths.
path_list &Paths = getFilePaths();
const std::string OSLibDir = std::string(getOSLibDir(Triple, Args));
const std::string MultiarchTriple = getMultiarchTriple(D, Triple, SysRoot);
Generic_GCC::AddMultilibPaths(D, SysRoot, OSLibDir, MultiarchTriple, Paths);
addPathIfExists(D, concat(SysRoot, "/lib", MultiarchTriple), Paths);
addPathIfExists(D, concat(SysRoot, "/lib/..", OSLibDir), Paths);
addPathIfExists(D, concat(SysRoot, "/usr/lib", MultiarchTriple), Paths);
addPathIfExists(D, concat(SysRoot, "/usr", OSLibDir), Paths);
Generic_GCC::AddMultiarchPaths(D, SysRoot, OSLibDir, Paths);
addPathIfExists(D, concat(SysRoot, "/lib"), Paths);
addPathIfExists(D, concat(SysRoot, "/usr/lib"), Paths);
}
bool Managarm::HasNativeLLVMSupport() const { return true; }
Tool *Managarm::buildLinker() const {
return new tools::gnutools::Linker(*this);
}
Tool *Managarm::buildAssembler() const {
return new tools::gnutools::Assembler(*this);
}
std::string Managarm::computeSysRoot() const {
if (!getDriver().SysRoot.empty())
return getDriver().SysRoot;
return std::string();
}
std::string Managarm::getDynamicLinker(const ArgList &Args) const {
switch (getTriple().getArch()) {
case llvm::Triple::aarch64:
return "/lib/aarch64-managarm/ld.so";
case llvm::Triple::riscv64: {
StringRef ABIName = tools::riscv::getRISCVABI(Args, getTriple());
return ("/lib/riscv64-managarm/ld-riscv64-" + ABIName + ".so").str();
}
case llvm::Triple::x86_64:
return "/lib/x86_64-managarm/ld.so";
default:
llvm_unreachable("unsupported architecture");
}
}
void Managarm::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
ArgStringList &CC1Args) const {
const Driver &D = getDriver();
std::string SysRoot = computeSysRoot();
if (DriverArgs.hasArg(clang::driver::options::OPT_nostdinc))
return;
if (!DriverArgs.hasArg(options::OPT_nostdlibinc))
addSystemInclude(DriverArgs, CC1Args, SysRoot + "/usr/local/include");
// Add 'include' in the resource directory, which is similar to
// GCC_INCLUDE_DIR (private headers) in GCC.
if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
SmallString<128> ResourceDirInclude(D.ResourceDir);
llvm::sys::path::append(ResourceDirInclude, "include");
addSystemInclude(DriverArgs, CC1Args, ResourceDirInclude);
}
if (DriverArgs.hasArg(options::OPT_nostdlibinc))
return;
// TOOL_INCLUDE_DIR
AddMultilibIncludeArgs(DriverArgs, CC1Args);
// Check for configure-time C include directories.
StringRef CIncludeDirs(C_INCLUDE_DIRS);
if (CIncludeDirs != "") {
SmallVector<StringRef, 5> dirs;
CIncludeDirs.split(dirs, ":");
for (StringRef dir : dirs) {
StringRef Prefix =
llvm::sys::path::is_absolute(dir) ? StringRef(SysRoot) : "";
addExternCSystemInclude(DriverArgs, CC1Args, Prefix + dir);
}
return;
}
// On systems using multiarch, add /usr/include/$triple before
// /usr/include.
std::string MultiarchIncludeDir = getMultiarchTriple(D, getTriple(), SysRoot);
if (!MultiarchIncludeDir.empty())
addExternCSystemInclude(
DriverArgs, CC1Args,
concat(SysRoot, "/usr/include", MultiarchIncludeDir));
// Add an include of '/include' directly. This isn't provided by default by
// system GCCs, but is often used with cross-compiling GCCs, and harmless to
// add even when Clang is acting as-if it were a system compiler.
addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/include"));
addExternCSystemInclude(DriverArgs, CC1Args, concat(SysRoot, "/usr/include"));
}
void Managarm::addLibStdCxxIncludePaths(
const llvm::opt::ArgList &DriverArgs,
llvm::opt::ArgStringList &CC1Args) const {
// We need a detected GCC installation on Managarm to provide libstdc++'s
// headers.
if (!GCCInstallation.isValid())
return;
// Try generic GCC detection.
addGCCLibStdCxxIncludePaths(DriverArgs, CC1Args);
}
SanitizerMask Managarm::getSupportedSanitizers() const {
const bool IsX86_64 = getTriple().getArch() == llvm::Triple::x86_64;
SanitizerMask Res = ToolChain::getSupportedSanitizers();
Res |= SanitizerKind::PointerCompare;
Res |= SanitizerKind::PointerSubtract;
Res |= SanitizerKind::KernelAddress;
Res |= SanitizerKind::Vptr;
if (IsX86_64)
Res |= SanitizerKind::KernelMemory;
return Res;
}
void Managarm::addExtraOpts(llvm::opt::ArgStringList &CmdArgs) const {
for (const auto &Opt : ExtraOpts)
CmdArgs.push_back(Opt.c_str());
}
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