forked from OSchip/llvm-project
479 lines
17 KiB
C++
479 lines
17 KiB
C++
//===-- PIC16TargetObjectFile.cpp - PIC16 object files --------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "PIC16TargetObjectFile.h"
|
|
#include "MCSectionPIC16.h"
|
|
#include "PIC16ISelLowering.h"
|
|
#include "PIC16TargetMachine.h"
|
|
#include "llvm/DerivedTypes.h"
|
|
#include "llvm/Module.h"
|
|
#include "llvm/MC/MCSection.h"
|
|
#include "llvm/MC/MCContext.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
using namespace llvm;
|
|
|
|
|
|
MCSectionPIC16 *MCSectionPIC16::Create(const StringRef &Name,
|
|
SectionKind K, MCContext &Ctx) {
|
|
return new (Ctx) MCSectionPIC16(Name, K);
|
|
}
|
|
|
|
|
|
void MCSectionPIC16::PrintSwitchToSection(const TargetAsmInfo &TAI,
|
|
raw_ostream &OS) const {
|
|
OS << getName() << '\n';
|
|
}
|
|
|
|
|
|
|
|
|
|
PIC16TargetObjectFile::PIC16TargetObjectFile()
|
|
: ExternalVarDecls(0), ExternalVarDefs(0) {
|
|
}
|
|
|
|
const MCSectionPIC16 *PIC16TargetObjectFile::
|
|
getPIC16Section(const char *Name, SectionKind Kind) const {
|
|
MCSectionPIC16 *&Entry = SectionsByName[Name];
|
|
if (Entry)
|
|
return Entry;
|
|
|
|
return Entry = MCSectionPIC16::Create(Name, Kind, getContext());
|
|
}
|
|
|
|
|
|
void PIC16TargetObjectFile::Initialize(MCContext &Ctx, const TargetMachine &tm){
|
|
TargetLoweringObjectFile::Initialize(Ctx, tm);
|
|
TM = &tm;
|
|
|
|
BSSSection = getPIC16Section("udata.# UDATA", SectionKind::getBSS());
|
|
ReadOnlySection = getPIC16Section("romdata.# ROMDATA",
|
|
SectionKind::getReadOnly());
|
|
DataSection = getPIC16Section("idata.# IDATA", SectionKind::getDataRel());
|
|
|
|
// Need because otherwise a .text symbol is emitted by DwarfWriter
|
|
// in BeginModule, and gpasm cribbs for that .text symbol.
|
|
TextSection = getPIC16Section("", SectionKind::getText());
|
|
|
|
ROSections.push_back(new PIC16Section((MCSectionPIC16*)ReadOnlySection));
|
|
|
|
// FIXME: I don't know what the classification of these sections really is.
|
|
ExternalVarDecls = new PIC16Section(getPIC16Section("ExternalVarDecls",
|
|
SectionKind::getMetadata()));
|
|
ExternalVarDefs = new PIC16Section(getPIC16Section("ExternalVarDefs",
|
|
SectionKind::getMetadata()));
|
|
}
|
|
|
|
const MCSection *PIC16TargetObjectFile::
|
|
getSectionForFunction(const std::string &FnName, bool isInterrupt) const {
|
|
std::string T = PAN::getCodeSectionName(FnName, isInterrupt);
|
|
return getPIC16Section(T.c_str(), SectionKind::getText());
|
|
}
|
|
|
|
|
|
const MCSection *PIC16TargetObjectFile::
|
|
getSectionForFunctionFrame(const std::string &FnName) const {
|
|
std::string T = PAN::getFrameSectionName(FnName);
|
|
return getPIC16Section(T.c_str(), SectionKind::getDataRel());
|
|
}
|
|
|
|
const MCSection *
|
|
PIC16TargetObjectFile::getBSSSectionForGlobal(const GlobalVariable *GV) const {
|
|
assert(GV->hasInitializer() && "This global doesn't need space");
|
|
Constant *C = GV->getInitializer();
|
|
assert(C->isNullValue() && "Unitialized globals has non-zero initializer");
|
|
|
|
// Find how much space this global needs.
|
|
const TargetData *TD = TM->getTargetData();
|
|
const Type *Ty = C->getType();
|
|
unsigned ValSize = TD->getTypeAllocSize(Ty);
|
|
|
|
// Go through all BSS Sections and assign this variable
|
|
// to the first available section having enough space.
|
|
PIC16Section *FoundBSS = NULL;
|
|
for (unsigned i = 0; i < BSSSections.size(); i++) {
|
|
if (DataBankSize - BSSSections[i]->Size >= ValSize) {
|
|
FoundBSS = BSSSections[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
// No BSS section spacious enough was found. Crate a new one.
|
|
if (!FoundBSS) {
|
|
std::string name = PAN::getUdataSectionName(BSSSections.size());
|
|
const MCSectionPIC16 *NewSection
|
|
= getPIC16Section(name.c_str(), /*FIXME*/ SectionKind::getMetadata());
|
|
|
|
FoundBSS = new PIC16Section(NewSection);
|
|
|
|
// Add this newly created BSS section to the list of BSSSections.
|
|
BSSSections.push_back(FoundBSS);
|
|
}
|
|
|
|
// Insert the GV into this BSS.
|
|
FoundBSS->Items.push_back(GV);
|
|
FoundBSS->Size += ValSize;
|
|
return FoundBSS->S_;
|
|
}
|
|
|
|
const MCSection *
|
|
PIC16TargetObjectFile::getIDATASectionForGlobal(const GlobalVariable *GV) const{
|
|
assert(GV->hasInitializer() && "This global doesn't need space");
|
|
Constant *C = GV->getInitializer();
|
|
assert(!C->isNullValue() && "initialized globals has zero initializer");
|
|
assert(GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE &&
|
|
"can split initialized RAM data only");
|
|
|
|
// Find how much space this global needs.
|
|
const TargetData *TD = TM->getTargetData();
|
|
const Type *Ty = C->getType();
|
|
unsigned ValSize = TD->getTypeAllocSize(Ty);
|
|
|
|
// Go through all IDATA Sections and assign this variable
|
|
// to the first available section having enough space.
|
|
PIC16Section *FoundIDATA = NULL;
|
|
for (unsigned i = 0; i < IDATASections.size(); i++) {
|
|
if (DataBankSize - IDATASections[i]->Size >= ValSize) {
|
|
FoundIDATA = IDATASections[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
// No IDATA section spacious enough was found. Crate a new one.
|
|
if (!FoundIDATA) {
|
|
std::string name = PAN::getIdataSectionName(IDATASections.size());
|
|
const MCSectionPIC16 *NewSection =
|
|
getPIC16Section(name.c_str(), /*FIXME*/ SectionKind::getMetadata());
|
|
|
|
FoundIDATA = new PIC16Section(NewSection);
|
|
|
|
// Add this newly created IDATA section to the list of IDATASections.
|
|
IDATASections.push_back(FoundIDATA);
|
|
}
|
|
|
|
// Insert the GV into this IDATA.
|
|
FoundIDATA->Items.push_back(GV);
|
|
FoundIDATA->Size += ValSize;
|
|
return FoundIDATA->S_;
|
|
}
|
|
|
|
// Get the section for an automatic variable of a function.
|
|
// For PIC16 they are globals only with mangled names.
|
|
const MCSection *
|
|
PIC16TargetObjectFile::getSectionForAuto(const GlobalVariable *GV) const {
|
|
|
|
const std::string name = PAN::getSectionNameForSym(GV->getName());
|
|
|
|
// Go through all Auto Sections and assign this variable
|
|
// to the appropriate section.
|
|
PIC16Section *FoundAutoSec = NULL;
|
|
for (unsigned i = 0; i < AutosSections.size(); i++) {
|
|
if (AutosSections[i]->S_->getName() == name) {
|
|
FoundAutoSec = AutosSections[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
// No Auto section was found. Crate a new one.
|
|
if (!FoundAutoSec) {
|
|
const MCSectionPIC16 *NewSection =
|
|
getPIC16Section(name.c_str(), /*FIXME*/ SectionKind::getMetadata());
|
|
|
|
FoundAutoSec = new PIC16Section(NewSection);
|
|
|
|
// Add this newly created autos section to the list of AutosSections.
|
|
AutosSections.push_back(FoundAutoSec);
|
|
}
|
|
|
|
// Insert the auto into this section.
|
|
FoundAutoSec->Items.push_back(GV);
|
|
|
|
return FoundAutoSec->S_;
|
|
}
|
|
|
|
void PIC16TargetObjectFile::createClonedSectionForAutos(const std::string &SecName) {
|
|
|
|
// If the function is cloned then it will have ".IL" in its name
|
|
// If this function is not cloned then return;
|
|
if (SecName.find(".IL") == std::string::npos)
|
|
return;
|
|
|
|
// Come here if the function is cloned.
|
|
// Get the name of the original section from which it has been cloned.
|
|
std::string OrigName = SecName;
|
|
OrigName.replace(SecName.find(".IL"),3,"");
|
|
|
|
// Find original section
|
|
PIC16Section *FoundAutoSec = NULL;
|
|
for (unsigned i = 0; i < AutosSections.size(); i++) {
|
|
if (AutosSections[i]->S_->getName() == OrigName) {
|
|
FoundAutoSec = AutosSections[i];
|
|
break;
|
|
}
|
|
}
|
|
|
|
// No auto section exists for the original function.
|
|
if (!FoundAutoSec)
|
|
return;
|
|
|
|
// Create new section for the cloned function
|
|
const MCSectionPIC16 *NewSection =
|
|
getPIC16Section(SecName.c_str(), SectionKind::getMetadata());
|
|
|
|
PIC16Section *NewAutoSec = new PIC16Section(NewSection);
|
|
// Add this newly created autos section to the list of AutosSections.
|
|
AutosSections.push_back(NewAutoSec);
|
|
|
|
// Add the items from the original section to the new section
|
|
// Donot mangle them here. Because mangling them here will distort
|
|
// the original names.
|
|
// These names will be mangled them at the time of printing only
|
|
const std::vector<const GlobalVariable*> &Items = FoundAutoSec->Items;
|
|
for (unsigned j = 0; j < Items.size(); j++) {
|
|
NewAutoSec->Items.push_back(Items[j]);
|
|
}
|
|
}
|
|
|
|
// Override default implementation to put the true globals into
|
|
// multiple data sections if required.
|
|
const MCSection *
|
|
PIC16TargetObjectFile::SelectSectionForGlobal(const GlobalValue *GV1,
|
|
SectionKind Kind,
|
|
Mangler *Mang,
|
|
const TargetMachine &TM) const {
|
|
// We select the section based on the initializer here, so it really
|
|
// has to be a GlobalVariable.
|
|
const GlobalVariable *GV = dyn_cast<GlobalVariable>(GV1);
|
|
if (!GV)
|
|
return TargetLoweringObjectFile::SelectSectionForGlobal(GV1, Kind, Mang,TM);
|
|
|
|
// Record External Var Decls.
|
|
if (GV->isDeclaration()) {
|
|
ExternalVarDecls->Items.push_back(GV);
|
|
return ExternalVarDecls->S_;
|
|
}
|
|
|
|
assert(GV->hasInitializer() && "A def without initializer?");
|
|
|
|
// First, if this is an automatic variable for a function, get the section
|
|
// name for it and return.
|
|
std::string name = GV->getName();
|
|
if (PAN::isLocalName(name))
|
|
return getSectionForAuto(GV);
|
|
|
|
// Record Exteranl Var Defs.
|
|
if (GV->hasExternalLinkage() || GV->hasCommonLinkage())
|
|
ExternalVarDefs->Items.push_back(GV);
|
|
|
|
// See if this is an uninitialized global.
|
|
const Constant *C = GV->getInitializer();
|
|
if (C->isNullValue())
|
|
return getBSSSectionForGlobal(GV);
|
|
|
|
// If this is initialized data in RAM. Put it in the correct IDATA section.
|
|
if (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE)
|
|
return getIDATASectionForGlobal(GV);
|
|
|
|
// This is initialized data in rom, put it in the readonly section.
|
|
if (GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE)
|
|
return getROSectionForGlobal(GV);
|
|
|
|
// Else let the default implementation take care of it.
|
|
return TargetLoweringObjectFile::SelectSectionForGlobal(GV, Kind, Mang,TM);
|
|
}
|
|
|
|
PIC16TargetObjectFile::~PIC16TargetObjectFile() {
|
|
for (unsigned i = 0; i < BSSSections.size(); i++)
|
|
delete BSSSections[i];
|
|
for (unsigned i = 0; i < IDATASections.size(); i++)
|
|
delete IDATASections[i];
|
|
for (unsigned i = 0; i < AutosSections.size(); i++)
|
|
delete AutosSections[i];
|
|
for (unsigned i = 0; i < ROSections.size(); i++)
|
|
delete ROSections[i];
|
|
delete ExternalVarDecls;
|
|
delete ExternalVarDefs;
|
|
}
|
|
|
|
|
|
/// getSpecialCasedSectionGlobals - Allow the target to completely override
|
|
/// section assignment of a global.
|
|
const MCSection *PIC16TargetObjectFile::
|
|
getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
|
|
Mangler *Mang, const TargetMachine &TM) const {
|
|
assert(GV->hasSection());
|
|
|
|
if (const GlobalVariable *GVar = cast<GlobalVariable>(GV)) {
|
|
std::string SectName = GVar->getSection();
|
|
// If address for a variable is specified, get the address and create
|
|
// section.
|
|
std::string AddrStr = "Address=";
|
|
if (SectName.compare(0, AddrStr.length(), AddrStr) == 0) {
|
|
std::string SectAddr = SectName.substr(AddrStr.length());
|
|
return CreateSectionForGlobal(GVar, Mang, SectAddr);
|
|
}
|
|
|
|
// Create the section specified with section attribute.
|
|
return CreateSectionForGlobal(GVar, Mang);
|
|
}
|
|
|
|
return getPIC16Section(GV->getSection().c_str(), Kind);
|
|
}
|
|
|
|
// Create a new section for global variable. If Addr is given then create
|
|
// section at that address else create by name.
|
|
const MCSection *
|
|
PIC16TargetObjectFile::CreateSectionForGlobal(const GlobalVariable *GV,
|
|
Mangler *Mang,
|
|
const std::string &Addr) const {
|
|
// See if this is an uninitialized global.
|
|
const Constant *C = GV->getInitializer();
|
|
if (C->isNullValue())
|
|
return CreateBSSSectionForGlobal(GV, Addr);
|
|
|
|
// If this is initialized data in RAM. Put it in the correct IDATA section.
|
|
if (GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE)
|
|
return CreateIDATASectionForGlobal(GV, Addr);
|
|
|
|
// This is initialized data in rom, put it in the readonly section.
|
|
if (GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE)
|
|
return CreateROSectionForGlobal(GV, Addr);
|
|
|
|
// Else let the default implementation take care of it.
|
|
return TargetLoweringObjectFile::SectionForGlobal(GV, Mang, *TM);
|
|
}
|
|
|
|
// Create uninitialized section for a variable.
|
|
const MCSection *
|
|
PIC16TargetObjectFile::CreateBSSSectionForGlobal(const GlobalVariable *GV,
|
|
std::string Addr) const {
|
|
assert(GV->hasInitializer() && "This global doesn't need space");
|
|
assert(GV->getInitializer()->isNullValue() &&
|
|
"Unitialized global has non-zero initializer");
|
|
std::string Name;
|
|
// If address is given then create a section at that address else create a
|
|
// section by section name specified in GV.
|
|
PIC16Section *FoundBSS = NULL;
|
|
if (Addr.empty()) {
|
|
Name = GV->getSection() + " UDATA";
|
|
for (unsigned i = 0; i < BSSSections.size(); i++) {
|
|
if (BSSSections[i]->S_->getName() == Name) {
|
|
FoundBSS = BSSSections[i];
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
std::string Prefix = GV->getNameStr() + "." + Addr + ".";
|
|
Name = PAN::getUdataSectionName(BSSSections.size(), Prefix) + " " + Addr;
|
|
}
|
|
|
|
PIC16Section *NewBSS = FoundBSS;
|
|
if (NewBSS == NULL) {
|
|
const MCSectionPIC16 *NewSection =
|
|
getPIC16Section(Name.c_str(), SectionKind::getBSS());
|
|
NewBSS = new PIC16Section(NewSection);
|
|
BSSSections.push_back(NewBSS);
|
|
}
|
|
|
|
// Insert the GV into this BSS.
|
|
NewBSS->Items.push_back(GV);
|
|
|
|
// We do not want to put any GV without explicit section into this section
|
|
// so set its size to DatabankSize.
|
|
NewBSS->Size = DataBankSize;
|
|
return NewBSS->S_;
|
|
}
|
|
|
|
// Get rom section for a variable. Currently there can be only one rom section
|
|
// unless a variable explicitly requests a section.
|
|
const MCSection *
|
|
PIC16TargetObjectFile::getROSectionForGlobal(const GlobalVariable *GV) const {
|
|
ROSections[0]->Items.push_back(GV);
|
|
return ROSections[0]->S_;
|
|
}
|
|
|
|
// Create initialized data section for a variable.
|
|
const MCSection *
|
|
PIC16TargetObjectFile::CreateIDATASectionForGlobal(const GlobalVariable *GV,
|
|
std::string Addr) const {
|
|
assert(GV->hasInitializer() && "This global doesn't need space");
|
|
assert(!GV->getInitializer()->isNullValue() &&
|
|
"initialized global has zero initializer");
|
|
assert(GV->getType()->getAddressSpace() == PIC16ISD::RAM_SPACE &&
|
|
"can be used for initialized RAM data only");
|
|
|
|
std::string Name;
|
|
// If address is given then create a section at that address else create a
|
|
// section by section name specified in GV.
|
|
PIC16Section *FoundIDATASec = NULL;
|
|
if (Addr.empty()) {
|
|
Name = GV->getSection() + " IDATA";
|
|
for (unsigned i = 0; i < IDATASections.size(); i++) {
|
|
if (IDATASections[i]->S_->getName() == Name) {
|
|
FoundIDATASec = IDATASections[i];
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
std::string Prefix = GV->getNameStr() + "." + Addr + ".";
|
|
Name = PAN::getIdataSectionName(IDATASections.size(), Prefix) + " " + Addr;
|
|
}
|
|
|
|
PIC16Section *NewIDATASec = FoundIDATASec;
|
|
if (NewIDATASec == NULL) {
|
|
const MCSectionPIC16 *NewSection =
|
|
getPIC16Section(Name.c_str(), /* FIXME */SectionKind::getMetadata());
|
|
NewIDATASec = new PIC16Section(NewSection);
|
|
IDATASections.push_back(NewIDATASec);
|
|
}
|
|
// Insert the GV into this IDATA Section.
|
|
NewIDATASec->Items.push_back(GV);
|
|
// We do not want to put any GV without explicit section into this section
|
|
// so set its size to DatabankSize.
|
|
NewIDATASec->Size = DataBankSize;
|
|
return NewIDATASec->S_;
|
|
}
|
|
|
|
// Create a section in rom for a variable.
|
|
const MCSection *
|
|
PIC16TargetObjectFile::CreateROSectionForGlobal(const GlobalVariable *GV,
|
|
std::string Addr) const {
|
|
assert(GV->getType()->getAddressSpace() == PIC16ISD::ROM_SPACE &&
|
|
"can be used for ROM data only");
|
|
|
|
std::string Name;
|
|
// If address is given then create a section at that address else create a
|
|
// section by section name specified in GV.
|
|
PIC16Section *FoundROSec = NULL;
|
|
if (Addr.empty()) {
|
|
Name = GV->getSection() + " ROMDATA";
|
|
for (unsigned i = 1; i < ROSections.size(); i++) {
|
|
if (ROSections[i]->S_->getName() == Name) {
|
|
FoundROSec = ROSections[i];
|
|
break;
|
|
}
|
|
}
|
|
} else {
|
|
std::string Prefix = GV->getNameStr() + "." + Addr + ".";
|
|
Name = PAN::getRomdataSectionName(ROSections.size(), Prefix) + " " + Addr;
|
|
}
|
|
|
|
PIC16Section *NewRomSec = FoundROSec;
|
|
if (NewRomSec == NULL) {
|
|
const MCSectionPIC16 *NewSection =
|
|
getPIC16Section(Name.c_str(), SectionKind::getReadOnly());
|
|
NewRomSec = new PIC16Section(NewSection);
|
|
ROSections.push_back(NewRomSec);
|
|
}
|
|
|
|
// Insert the GV into this ROM Section.
|
|
NewRomSec->Items.push_back(GV);
|
|
return NewRomSec->S_;
|
|
}
|
|
|