//===--- AVR.cpp - AVR 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 "AVR.h"
#include "CommonArgs.h"
#include "InputInfo.h"
#include "clang/Driver/Compilation.h"
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "llvm/ADT/Optional.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringSwitch.h"
#include "llvm/MC/MCSubtargetInfo.h"
#include "llvm/MC/SubtargetFeature.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/FileSystem.h"
using namespace clang::driver;
using namespace clang::driver::toolchains;
using namespace clang::driver::tools;
using namespace clang;
using namespace llvm::opt;
namespace {
const struct {
StringRef Name;
std::string SubPath;
StringRef Family;
unsigned DataAddr;
} MCUInfo[] = {
{"at90s1200", "", "avr1", 0},
{"attiny11", "", "avr1", 0},
{"attiny12", "", "avr1", 0},
{"attiny15", "", "avr1", 0},
{"attiny28", "", "avr1", 0},
{"at90s2313", "tiny-stack", "avr2", 0x800060},
{"at90s2323", "tiny-stack", "avr2", 0x800060},
{"at90s2333", "tiny-stack", "avr2", 0x800060},
{"at90s2343", "tiny-stack", "avr2", 0x800060},
{"at90s4433", "tiny-stack", "avr2", 0x800060},
{"attiny22", "tiny-stack", "avr2", 0x800060},
{"attiny26", "tiny-stack", "avr2", 0x800060},
{"at90s4414", "", "avr2", 0x800060},
{"at90s4434", "", "avr2", 0x800060},
{"at90s8515", "", "avr2", 0x800060},
{"at90c8534", "", "avr2", 0x800060},
{"at90s8535", "", "avr2", 0x800060},
{"attiny13", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny13a", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny2313", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny2313a", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny24", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny24a", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny25", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny261", "avr25/tiny-stack", "avr25", 0x800060},
{"attiny261a", "avr25/tiny-stack", "avr25", 0x800060},
{"at86rf401", "avr25", "avr25", 0x800060},
{"ata5272", "avr25", "avr25", 0x800100},
{"attiny4313", "avr25", "avr25", 0x800060},
{"attiny44", "avr25", "avr25", 0x800060},
{"attiny44a", "avr25", "avr25", 0x800060},
{"attiny84", "avr25", "avr25", 0x800060},
{"attiny84a", "avr25", "avr25", 0x800060},
{"attiny45", "avr25", "avr25", 0x800060},
{"attiny85", "avr25", "avr25", 0x800060},
{"attiny441", "avr25", "avr25", 0x800100},
{"attiny461", "avr25", "avr25", 0x800060},
{"attiny461a", "avr25", "avr25", 0x800060},
{"attiny841", "avr25", "avr25", 0x800100},
{"attiny861", "avr25", "avr25", 0x800060},
{"attiny861a", "avr25", "avr25", 0x800060},
{"attiny87", "avr25", "avr25", 0x800100},
{"attiny43u", "avr25", "avr25", 0x800060},
{"attiny48", "avr25", "avr25", 0x800100},
{"attiny88", "avr25", "avr25", 0x800100},
{"attiny828", "avr25", "avr25", 0x800100},
{"at43usb355", "avr3", "avr3", 0x800100},
{"at76c711", "avr3", "avr3", 0x800060},
{"atmega103", "avr31", "avr31", 0x800060},
{"at43usb320", "avr31", "avr31", 0x800060},
{"attiny167", "avr35", "avr35", 0x800100},
{"at90usb82", "avr35", "avr35", 0x800100},
{"at90usb162", "avr35", "avr35", 0x800100},
{"ata5505", "avr35", "avr35", 0x800100},
{"atmega8u2", "avr35", "avr35", 0x800100},
{"atmega16u2", "avr35", "avr35", 0x800100},
{"atmega32u2", "avr35", "avr35", 0x800100},
{"attiny1634", "avr35", "avr35", 0x800100},
{"atmega8", "avr4", "avr4", 0x800060},
{"ata6289", "avr4", "avr4", 0x800100},
{"atmega8a", "avr4", "avr4", 0x800060},
{"ata6285", "avr4", "avr4", 0x800100},
{"ata6286", "avr4", "avr4", 0x800100},
{"atmega48", "avr4", "avr4", 0x800100},
{"atmega48a", "avr4", "avr4", 0x800100},
{"atmega48pa", "avr4", "avr4", 0x800100},
{"atmega48pb", "avr4", "avr4", 0x800100},
{"atmega48p", "avr4", "avr4", 0x800100},
{"atmega88", "avr4", "avr4", 0x800100},
{"atmega88a", "avr4", "avr4", 0x800100},
{"atmega88p", "avr4", "avr4", 0x800100},
{"atmega88pa", "avr4", "avr4", 0x800100},
{"atmega88pb", "avr4", "avr4", 0x800100},
{"atmega8515", "avr4", "avr4", 0x800060},
{"atmega8535", "avr4", "avr4", 0x800060},
{"atmega8hva", "avr4", "avr4", 0x800100},
{"at90pwm1", "avr4", "avr4", 0x800100},
{"at90pwm2", "avr4", "avr4", 0x800100},
{"at90pwm2b", "avr4", "avr4", 0x800100},
{"at90pwm3", "avr4", "avr4", 0x800100},
{"at90pwm3b", "avr4", "avr4", 0x800100},
{"at90pwm81", "avr4", "avr4", 0x800100},
{"ata5790", "avr5", "avr5", 0x800100},
{"ata5795", "avr5", "avr5", 0x800100},
{"atmega16", "avr5", "avr5", 0x800060},
{"atmega16a", "avr5", "avr5", 0x800060},
{"atmega161", "avr5", "avr5", 0x800060},
{"atmega162", "avr5", "avr5", 0x800100},
{"atmega163", "avr5", "avr5", 0x800060},
{"atmega164a", "avr5", "avr5", 0x800100},
{"atmega164p", "avr5", "avr5", 0x800100},
{"atmega164pa", "avr5", "avr5", 0x800100},
{"atmega165", "avr5", "avr5", 0x800100},
{"atmega165a", "avr5", "avr5", 0x800100},
{"atmega165p", "avr5", "avr5", 0x800100},
{"atmega165pa", "avr5", "avr5", 0x800100},
{"atmega168", "avr5", "avr5", 0x800100},
{"atmega168a", "avr5", "avr5", 0x800100},
{"atmega168p", "avr5", "avr5", 0x800100},
{"atmega168pa", "avr5", "avr5", 0x800100},
{"atmega168pb", "avr5", "avr5", 0x800100},
{"atmega169", "avr5", "avr5", 0x800100},
{"atmega169a", "avr5", "avr5", 0x800100},
{"atmega169p", "avr5", "avr5", 0x800100},
{"atmega169pa", "avr5", "avr5", 0x800100},
{"atmega32", "avr5", "avr5", 0x800060},
{"atmega32a", "avr5", "avr5", 0x800060},
{"atmega323", "avr5", "avr5", 0x800060},
{"atmega324a", "avr5", "avr5", 0x800100},
{"atmega324p", "avr5", "avr5", 0x800100},
{"atmega324pa", "avr5", "avr5", 0x800100},
{"atmega325", "avr5", "avr5", 0x800100},
{"atmega325a", "avr5", "avr5", 0x800100},
{"atmega325p", "avr5", "avr5", 0x800100},
{"atmega325pa", "avr5", "avr5", 0x800100},
{"atmega3250", "avr5", "avr5", 0x800100},
{"atmega3250a", "avr5", "avr5", 0x800100},
{"atmega3250p", "avr5", "avr5", 0x800100},
{"atmega3250pa", "avr5", "avr5", 0x800100},
{"atmega328", "avr5", "avr5", 0x800100},
{"atmega328p", "avr5", "avr5", 0x800100},
{"atmega329", "avr5", "avr5", 0x800100},
{"atmega329a", "avr5", "avr5", 0x800100},
{"atmega329p", "avr5", "avr5", 0x800100},
{"atmega329pa", "avr5", "avr5", 0x800100},
{"atmega3290", "avr5", "avr5", 0x800100},
{"atmega3290a", "avr5", "avr5", 0x800100},
{"atmega3290p", "avr5", "avr5", 0x800100},
{"atmega3290pa", "avr5", "avr5", 0x800100},
{"atmega406", "avr5", "avr5", 0x800100},
{"atmega64", "avr5", "avr5", 0x800100},
{"atmega64a", "avr5", "avr5", 0x800100},
{"atmega640", "avr5", "avr5", 0x800200},
{"atmega644", "avr5", "avr5", 0x800100},
{"atmega644a", "avr5", "avr5", 0x800100},
{"atmega644p", "avr5", "avr5", 0x800100},
{"atmega644pa", "avr5", "avr5", 0x800100},
{"atmega645", "avr5", "avr5", 0x800100},
{"atmega645a", "avr5", "avr5", 0x800100},
{"atmega645p", "avr5", "avr5", 0x800100},
{"atmega649", "avr5", "avr5", 0x800100},
{"atmega649a", "avr5", "avr5", 0x800100},
{"atmega649p", "avr5", "avr5", 0x800100},
{"atmega6450", "avr5", "avr5", 0x800100},
{"atmega6450a", "avr5", "avr5", 0x800100},
{"atmega6450p", "avr5", "avr5", 0x800100},
{"atmega6490", "avr5", "avr5", 0x800100},
{"atmega6490a", "avr5", "avr5", 0x800100},
{"atmega6490p", "avr5", "avr5", 0x800100},
{"atmega64rfr2", "avr5", "avr5", 0x800200},
{"atmega644rfr2", "avr5", "avr5", 0x800200},
{"atmega16hva", "avr5", "avr5", 0x800100},
{"atmega16hva2", "avr5", "avr5", 0x800100},
{"atmega16hvb", "avr5", "avr5", 0x800100},
{"atmega16hvbrevb", "avr5", "avr5", 0x800100},
{"atmega32hvb", "avr5", "avr5", 0x800100},
{"atmega32hvbrevb", "avr5", "avr5", 0x800100},
{"atmega64hve", "avr5", "avr5", 0x800100},
{"at90can32", "avr5", "avr5", 0x800100},
{"at90can64", "avr5", "avr5", 0x800100},
{"at90pwm161", "avr5", "avr5", 0x800100},
{"at90pwm216", "avr5", "avr5", 0x800100},
{"at90pwm316", "avr5", "avr5", 0x800100},
{"atmega32c1", "avr5", "avr5", 0x800100},
{"atmega64c1", "avr5", "avr5", 0x800100},
{"atmega16m1", "avr5", "avr5", 0x800100},
{"atmega32m1", "avr5", "avr5", 0x800100},
{"atmega64m1", "avr5", "avr5", 0x800100},
{"atmega16u4", "avr5", "avr5", 0x800100},
{"atmega32u4", "avr5", "avr5", 0x800100},
{"atmega32u6", "avr5", "avr5", 0x800100},
{"at90usb646", "avr5", "avr5", 0x800100},
{"at90usb647", "avr5", "avr5", 0x800100},
{"at90scr100", "avr5", "avr5", 0x800100},
{"at94k", "avr5", "avr5", 0x800060},
{"m3000", "avr5", "avr5", 0x800060},
{"atmega128", "avr51", "avr51", 0x800100},
{"atmega128a", "avr51", "avr51", 0x800100},
{"atmega1280", "avr51", "avr51", 0x800200},
{"atmega1281", "avr51", "avr51", 0x800200},
{"atmega1284", "avr51", "avr51", 0x800100},
{"atmega1284p", "avr51", "avr51", 0x800100},
{"atmega128rfa1", "avr51", "avr51", 0x800200},
{"atmega128rfr2", "avr51", "avr51", 0x800200},
{"atmega1284rfr2", "avr51", "avr51", 0x800200},
{"at90can128", "avr51", "avr51", 0x800200},
{"at90usb1286", "avr51", "avr51", 0x800200},
{"at90usb1287", "avr51", "avr51", 0x800200},
{"atmega2560", "avr6", "avr6", 0x800200},
{"atmega2561", "avr6", "avr6", 0x800200},
{"atmega256rfr2", "avr6", "avr6", 0x800200},
{"atmega2564rfr2", "avr6", "avr6", 0x800200},
{"attiny4", "avrtiny", "avrtiny", 0x800040},
{"attiny5", "avrtiny", "avrtiny", 0x800040},
{"attiny9", "avrtiny", "avrtiny", 0x800040},
{"attiny10", "avrtiny", "avrtiny", 0x800040},
{"attiny20", "avrtiny", "avrtiny", 0x800040},
{"attiny40", "avrtiny", "avrtiny", 0x800040},
{"atxmega16a4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16a4u", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16c4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16d4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32a4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32a4u", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32c4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32d4", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega32e5", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega16e5", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega8e5", "avrxmega2", "avrxmega2", 0x802000},
{"atxmega64a3u", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64a4u", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64b1", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64b3", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64c3", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64d3", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64d4", "avrxmega4", "avrxmega4", 0x802000},
{"atxmega64a1", "avrxmega5", "avrxmega5", 0x802000},
{"atxmega64a1u", "avrxmega5", "avrxmega5", 0x802000},
{"atxmega128a3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128a3u", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128b1", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128b3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128d4", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192a3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192a3u", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega192d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3u", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3b", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256a3bu", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega256d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega384c3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega384d3", "avrxmega6", "avrxmega6", 0x802000},
{"atxmega128a1", "avrxmega7", "avrxmega7", 0x802000},
{"atxmega128a1u", "avrxmega7", "avrxmega7", 0x802000},
{"atxmega128a4u", "avrxmega7", "avrxmega7", 0x802000},
};
std::string GetMCUSubPath(StringRef MCUName) {
for (const auto &MCU : MCUInfo)
if (MCU.Name == MCUName)
return std::string(MCU.SubPath);
return "";
}
llvm::Optional<StringRef> GetMCUFamilyName(StringRef MCUName) {
for (const auto &MCU : MCUInfo)
if (MCU.Name == MCUName)
return Optional<StringRef>(MCU.Family);
return Optional<StringRef>();
}
llvm::Optional<unsigned> GetMCUSectionAddressData(StringRef MCUName) {
for (const auto &MCU : MCUInfo)
if (MCU.Name == MCUName && MCU.DataAddr > 0)
return Optional<unsigned>(MCU.DataAddr);
return Optional<unsigned>();
}
const StringRef PossibleAVRLibcLocations[] = {
"/usr/avr",
"/usr/lib/avr",
};
} // end anonymous namespace
/// AVR Toolchain
AVRToolChain::AVRToolChain(const Driver &D, const llvm::Triple &Triple,
const ArgList &Args)
: Generic_ELF(D, Triple, Args), LinkStdlib(false) {
GCCInstallation.init(Triple, Args);
// Only add default libraries if the user hasn't explicitly opted out.
if (!Args.hasArg(options::OPT_nostdlib) &&
!Args.hasArg(options::OPT_nodefaultlibs) &&
!Args.hasArg(options::OPT_c /* does not apply when not linking */)) {
std::string CPU = getCPUName(Args, Triple);
if (CPU.empty()) {
// We cannot link any standard libraries without an MCU specified.
D.Diag(diag::warn_drv_avr_mcu_not_specified);
} else {
Optional<StringRef> FamilyName = GetMCUFamilyName(CPU);
Optional<std::string> AVRLibcRoot = findAVRLibcInstallation();
if (!FamilyName.hasValue()) {
// We do not have an entry for this CPU in the family
// mapping table yet.
D.Diag(diag::warn_drv_avr_family_linking_stdlibs_not_implemented)
<< CPU;
} else if (!GCCInstallation.isValid()) {
// No avr-gcc found and so no runtime linked.
D.Diag(diag::warn_drv_avr_gcc_not_found);
} else if (!AVRLibcRoot.hasValue()) {
// No avr-libc found and so no runtime linked.
D.Diag(diag::warn_drv_avr_libc_not_found);
} else { // We have enough information to link stdlibs
std::string GCCRoot(GCCInstallation.getInstallPath());
std::string GCCParentPath(GCCInstallation.getParentLibPath());
std::string LibcRoot = AVRLibcRoot.getValue();
std::string SubPath = GetMCUSubPath(CPU);
getProgramPaths().push_back(GCCParentPath + "/../bin");
getFilePaths().push_back(LibcRoot + std::string("/lib/") + SubPath);
getFilePaths().push_back(GCCRoot + std::string("/") + SubPath);
LinkStdlib = true;
}
}
if (!LinkStdlib)
D.Diag(diag::warn_drv_avr_stdlib_not_linked);
}
}
Tool *AVRToolChain::buildLinker() const {
return new tools::AVR::Linker(getTriple(), *this, LinkStdlib);
}
void AVR::Linker::ConstructJob(Compilation &C, const JobAction &JA,
const InputInfo &Output,
const InputInfoList &Inputs, const ArgList &Args,
const char *LinkingOutput) const {
// Compute information about the target AVR.
std::string CPU = getCPUName(Args, getToolChain().getTriple());
llvm::Optional<StringRef> FamilyName = GetMCUFamilyName(CPU);
llvm::Optional<unsigned> SectionAddressData = GetMCUSectionAddressData(CPU);
std::string Linker = getToolChain().GetProgramPath(getShortName());
ArgStringList CmdArgs;
AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs, JA);
CmdArgs.push_back("-o");
CmdArgs.push_back(Output.getFilename());
// Enable garbage collection of unused sections.
CmdArgs.push_back("--gc-sections");
// Add library search paths before we specify libraries.
Args.AddAllArgs(CmdArgs, options::OPT_L);
getToolChain().AddFilePathLibArgs(Args, CmdArgs);
if (SectionAddressData.hasValue()) {
std::string DataSectionArg = std::string("-Tdata=0x") +
llvm::utohexstr(SectionAddressData.getValue());
CmdArgs.push_back(Args.MakeArgString(DataSectionArg));
} else {
// We do not have an entry for this CPU in the address mapping table yet.
getToolChain().getDriver().Diag(
diag::warn_drv_avr_linker_section_addresses_not_implemented)
<< CPU;
}
// If the family name is known, we can link with the device-specific libgcc.
// Without it, libgcc will simply not be linked. This matches avr-gcc
// behavior.
if (LinkStdlib) {
assert(!CPU.empty() && "CPU name must be known in order to link stdlibs");
// Add the object file for the CRT.
std::string CrtFileName = std::string("-l:crt") + CPU + std::string(".o");
CmdArgs.push_back(Args.MakeArgString(CrtFileName));
CmdArgs.push_back("-lgcc");
CmdArgs.push_back("-lm");
CmdArgs.push_back("-lc");
// Add the link library specific to the MCU.
CmdArgs.push_back(Args.MakeArgString(std::string("-l") + CPU));
// Specify the family name as the emulation mode to use.
// This is almost always required because otherwise avr-ld
// will assume 'avr2' and warn about the program being larger
// than the bare minimum supports.
CmdArgs.push_back(Args.MakeArgString(std::string("-m") + *FamilyName));
}
C.addCommand(std::make_unique<Command>(
JA, *this, ResponseFileSupport::AtFileCurCP(), Args.MakeArgString(Linker),
CmdArgs, Inputs, Output));
}
llvm::Optional<std::string> AVRToolChain::findAVRLibcInstallation() const {
for (StringRef PossiblePath : PossibleAVRLibcLocations) {
std::string Path = getDriver().SysRoot + PossiblePath.str();
// Return the first avr-libc installation that exists.
if (llvm::sys::fs::is_directory(Path))
return Optional<std::string>(Path);
}
return llvm::None;
}