maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/clang/lib/Driver/ToolChains/MSP430.cpp

319 lines
11 KiB
C++
Raw Blame History

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