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319 lines
11 KiB
319 lines
11 KiB
4 months ago
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//===--- MSP430.cpp - MSP430 Helpers for Tools ------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "MSP430.h"
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#include "CommonArgs.h"
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#include "Gnu.h"
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#include "InputInfo.h"
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#include "clang/Driver/Compilation.h"
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#include "clang/Driver/Multilib.h"
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#include "clang/Driver/Options.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Support/FileSystem.h"
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#include "llvm/Support/Path.h"
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using namespace clang::driver;
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using namespace clang::driver::toolchains;
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using namespace clang::driver::tools;
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using namespace clang;
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using namespace llvm::opt;
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static bool isSupportedMCU(const StringRef MCU) {
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return llvm::StringSwitch<bool>(MCU)
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#define MSP430_MCU(NAME) .Case(NAME, true)
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#include "clang/Basic/MSP430Target.def"
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.Default(false);
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}
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static StringRef getSupportedHWMult(const Arg *MCU) {
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if (!MCU)
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return "none";
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return llvm::StringSwitch<StringRef>(MCU->getValue())
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#define MSP430_MCU_FEAT(NAME, HWMULT) .Case(NAME, HWMULT)
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#include "clang/Basic/MSP430Target.def"
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.Default("none");
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}
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static StringRef getHWMultLib(const ArgList &Args) {
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StringRef HWMult = Args.getLastArgValue(options::OPT_mhwmult_EQ, "auto");
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if (HWMult == "auto") {
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HWMult = getSupportedHWMult(Args.getLastArg(options::OPT_mmcu_EQ));
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}
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return llvm::StringSwitch<StringRef>(HWMult)
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.Case("16bit", "-lmul_16")
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.Case("32bit", "-lmul_32")
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.Case("f5series", "-lmul_f5")
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.Default("-lmul_none");
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}
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void msp430::getMSP430TargetFeatures(const Driver &D, const ArgList &Args,
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std::vector<StringRef> &Features) {
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const Arg *MCU = Args.getLastArg(options::OPT_mmcu_EQ);
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if (MCU && !isSupportedMCU(MCU->getValue())) {
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D.Diag(diag::err_drv_clang_unsupported) << MCU->getValue();
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return;
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}
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const Arg *HWMultArg = Args.getLastArg(options::OPT_mhwmult_EQ);
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if (!MCU && !HWMultArg)
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return;
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StringRef HWMult = HWMultArg ? HWMultArg->getValue() : "auto";
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StringRef SupportedHWMult = getSupportedHWMult(MCU);
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if (HWMult == "auto") {
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// 'auto' - deduce hw multiplier support based on mcu name provided.
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// If no mcu name is provided, assume no hw multiplier is supported.
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if (!MCU)
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D.Diag(clang::diag::warn_drv_msp430_hwmult_no_device);
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HWMult = SupportedHWMult;
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}
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if (HWMult == "none") {
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// 'none' - disable hw multiplier.
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Features.push_back("-hwmult16");
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Features.push_back("-hwmult32");
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Features.push_back("-hwmultf5");
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return;
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}
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if (MCU && SupportedHWMult == "none")
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D.Diag(clang::diag::warn_drv_msp430_hwmult_unsupported) << HWMult;
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if (MCU && HWMult != SupportedHWMult)
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D.Diag(clang::diag::warn_drv_msp430_hwmult_mismatch)
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<< SupportedHWMult << HWMult;
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if (HWMult == "16bit") {
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// '16bit' - for 16-bit only hw multiplier.
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Features.push_back("+hwmult16");
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} else if (HWMult == "32bit") {
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// '32bit' - for 16/32-bit hw multiplier.
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Features.push_back("+hwmult32");
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} else if (HWMult == "f5series") {
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// 'f5series' - for 16/32-bit hw multiplier supported by F5 series mcus.
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Features.push_back("+hwmultf5");
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} else {
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D.Diag(clang::diag::err_drv_unsupported_option_argument)
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<< HWMultArg->getAsString(Args) << HWMult;
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}
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}
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/// MSP430 Toolchain
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MSP430ToolChain::MSP430ToolChain(const Driver &D, const llvm::Triple &Triple,
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const ArgList &Args)
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: Generic_ELF(D, Triple, Args) {
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StringRef MultilibSuf = "";
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GCCInstallation.init(Triple, Args);
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if (GCCInstallation.isValid()) {
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MultilibSuf = GCCInstallation.getMultilib().gccSuffix();
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SmallString<128> GCCBinPath;
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llvm::sys::path::append(GCCBinPath,
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GCCInstallation.getParentLibPath(), "..", "bin");
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addPathIfExists(D, GCCBinPath, getProgramPaths());
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SmallString<128> GCCRtPath;
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llvm::sys::path::append(GCCRtPath,
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GCCInstallation.getInstallPath(), MultilibSuf);
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addPathIfExists(D, GCCRtPath, getFilePaths());
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}
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SmallString<128> SysRootDir(computeSysRoot());
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llvm::sys::path::append(SysRootDir, "msp430-elf", "lib", MultilibSuf);
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addPathIfExists(D, SysRootDir, getFilePaths());
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}
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std::string MSP430ToolChain::computeSysRoot() const {
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if (!getDriver().SysRoot.empty())
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return getDriver().SysRoot;
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SmallString<128> Dir;
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if (GCCInstallation.isValid())
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llvm::sys::path::append(Dir, GCCInstallation.getParentLibPath(), "..");
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else
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llvm::sys::path::append(Dir, getDriver().Dir, "..");
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return std::string(Dir.str());
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}
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void MSP430ToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,
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ArgStringList &CC1Args) const {
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if (DriverArgs.hasArg(options::OPT_nostdinc) ||
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DriverArgs.hasArg(options::OPT_nostdlibinc))
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return;
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SmallString<128> Dir(computeSysRoot());
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llvm::sys::path::append(Dir, "msp430-elf", "include");
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addSystemInclude(DriverArgs, CC1Args, Dir.str());
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}
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void MSP430ToolChain::addClangTargetOptions(const ArgList &DriverArgs,
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ArgStringList &CC1Args,
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Action::OffloadKind) const {
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CC1Args.push_back("-nostdsysteminc");
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const auto *MCUArg = DriverArgs.getLastArg(options::OPT_mmcu_EQ);
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if (!MCUArg)
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return;
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const StringRef MCU = MCUArg->getValue();
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if (MCU.startswith("msp430i")) {
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// 'i' should be in lower case as it's defined in TI MSP430-GCC headers
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CC1Args.push_back(DriverArgs.MakeArgString(
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"-D__MSP430i" + MCU.drop_front(7).upper() + "__"));
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} else {
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CC1Args.push_back(DriverArgs.MakeArgString("-D__" + MCU.upper() + "__"));
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}
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}
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Tool *MSP430ToolChain::buildLinker() const {
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return new tools::msp430::Linker(*this);
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}
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void msp430::Linker::AddStartFiles(bool UseExceptions, const ArgList &Args,
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ArgStringList &CmdArgs) const {
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const ToolChain &ToolChain = getToolChain();
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CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath("crt0.o")));
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const char *crtbegin = UseExceptions ? "crtbegin.o" : "crtbegin_no_eh.o";
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CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtbegin)));
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}
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void msp430::Linker::AddDefaultLibs(const llvm::opt::ArgList &Args,
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llvm::opt::ArgStringList &CmdArgs) const {
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const ToolChain &ToolChain = getToolChain();
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const Driver &D = ToolChain.getDriver();
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CmdArgs.push_back("--start-group");
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CmdArgs.push_back(Args.MakeArgString(getHWMultLib(Args)));
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CmdArgs.push_back("-lc");
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AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
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CmdArgs.push_back("-lcrt");
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if (Args.hasArg(options::OPT_msim)) {
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CmdArgs.push_back("-lsim");
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// msp430-sim.ld relies on __crt0_call_exit being implicitly .refsym-ed
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// in main() by msp430-gcc.
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// This workaround should work seamlessly unless the compilation unit that
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// contains main() is compiled by clang and then passed to
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// gcc compiler driver for linkage.
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CmdArgs.push_back("--undefined=__crt0_call_exit");
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} else
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CmdArgs.push_back("-lnosys");
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CmdArgs.push_back("--end-group");
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AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
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}
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void msp430::Linker::AddEndFiles(bool UseExceptions, const ArgList &Args,
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ArgStringList &CmdArgs) const {
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const ToolChain &ToolChain = getToolChain();
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const Driver &D = ToolChain.getDriver();
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const char *crtend = UseExceptions ? "crtend.o" : "crtend_no_eh.o";
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CmdArgs.push_back(Args.MakeArgString(ToolChain.GetFilePath(crtend)));
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AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
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}
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static void AddSspArgs(const ArgList &Args, ArgStringList &CmdArgs) {
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Arg *SspFlag = Args.getLastArg(
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options::OPT_fno_stack_protector, options::OPT_fstack_protector,
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options::OPT_fstack_protector_all, options::OPT_fstack_protector_strong);
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if (SspFlag &&
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!SspFlag->getOption().matches(options::OPT_fno_stack_protector)) {
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CmdArgs.push_back("-lssp_nonshared");
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CmdArgs.push_back("-lssp");
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}
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}
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static void AddImplicitLinkerScript(const std::string SysRoot,
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const ArgList &Args,
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ArgStringList &CmdArgs) {
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if (Args.hasArg(options::OPT_T))
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return;
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if (Args.hasArg(options::OPT_msim)) {
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CmdArgs.push_back("-Tmsp430-sim.ld");
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return;
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}
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const Arg *MCUArg = Args.getLastArg(options::OPT_mmcu_EQ);
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if (!MCUArg)
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return;
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SmallString<128> MCULinkerScriptPath(SysRoot);
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llvm::sys::path::append(MCULinkerScriptPath, "include");
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// -L because <mcu>.ld INCLUDEs <mcu>_symbols.ld
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CmdArgs.push_back(Args.MakeArgString("-L" + MCULinkerScriptPath));
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CmdArgs.push_back(
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Args.MakeArgString("-T" + StringRef(MCUArg->getValue()) + ".ld"));
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}
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void msp430::Linker::ConstructJob(Compilation &C, const JobAction &JA,
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const InputInfo &Output,
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const InputInfoList &Inputs,
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const ArgList &Args,
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const char *LinkingOutput) const {
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const ToolChain &ToolChain = getToolChain();
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const Driver &D = ToolChain.getDriver();
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std::string Linker = ToolChain.GetProgramPath(getShortName());
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ArgStringList CmdArgs;
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bool UseExceptions = Args.hasFlag(options::OPT_fexceptions,
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options::OPT_fno_exceptions, false);
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bool UseStartAndEndFiles = !Args.hasArg(options::OPT_nostdlib, options::OPT_r,
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options::OPT_nostartfiles);
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if (Args.hasArg(options::OPT_mrelax))
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CmdArgs.push_back("--relax");
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if (!Args.hasArg(options::OPT_r, options::OPT_g_Group))
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CmdArgs.push_back("--gc-sections");
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Args.AddAllArgs(CmdArgs, {
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options::OPT_e,
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options::OPT_n,
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options::OPT_s,
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options::OPT_t,
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options::OPT_u,
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});
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if (UseStartAndEndFiles)
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AddStartFiles(UseExceptions, Args, CmdArgs);
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Args.AddAllArgs(CmdArgs, options::OPT_L);
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ToolChain.AddFilePathLibArgs(Args, CmdArgs);
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AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
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if (!Args.hasArg(options::OPT_nostdlib, options::OPT_r,
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options::OPT_nodefaultlibs)) {
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AddSspArgs(Args, CmdArgs);
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AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
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if (!Args.hasArg(options::OPT_nolibc)) {
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AddDefaultLibs(Args, CmdArgs);
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AddImplicitLinkerScript(D.SysRoot, Args, CmdArgs);
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}
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}
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if (UseStartAndEndFiles)
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AddEndFiles(UseExceptions, Args, CmdArgs);
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CmdArgs.push_back("-o");
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CmdArgs.push_back(Output.getFilename());
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Args.AddAllArgs(CmdArgs, options::OPT_T);
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C.addCommand(std::make_unique<Command>(
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JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Linker),
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CmdArgs, Inputs, Output));
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}
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