mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-11-02 22:23:10 +00:00
d04a8d4b33
Sooooo many of these had incorrect or strange main module includes. I have manually inspected all of these, and fixed the main module include to be the nearest plausible thing I could find. If you own or care about any of these source files, I encourage you to take some time and check that these edits were sensible. I can't have broken anything (I strictly added headers, and reordered them, never removed), but they may not be the headers you'd really like to identify as containing the API being implemented. Many forward declarations and missing includes were added to a header files to allow them to parse cleanly when included first. The main module rule does in fact have its merits. =] git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@169131 91177308-0d34-0410-b5e6-96231b3b80d8
289 lines
9.4 KiB
C++
289 lines
9.4 KiB
C++
//===-- ARMELFObjectWriter.cpp - ARM ELF Writer ---------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "MCTargetDesc/ARMMCTargetDesc.h"
|
|
#include "MCTargetDesc/ARMFixupKinds.h"
|
|
#include "llvm/ADT/Statistic.h"
|
|
#include "llvm/ADT/StringSwitch.h"
|
|
#include "llvm/MC/MCELFObjectWriter.h"
|
|
#include "llvm/MC/MCExpr.h"
|
|
#include "llvm/MC/MCSectionELF.h"
|
|
#include "llvm/MC/MCValue.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace {
|
|
class ARMELFObjectWriter : public MCELFObjectTargetWriter {
|
|
enum { DefaultEABIVersion = 0x05000000U };
|
|
unsigned GetRelocTypeInner(const MCValue &Target,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel) const;
|
|
|
|
|
|
public:
|
|
ARMELFObjectWriter(uint8_t OSABI);
|
|
|
|
virtual ~ARMELFObjectWriter();
|
|
|
|
virtual unsigned GetRelocType(const MCValue &Target, const MCFixup &Fixup,
|
|
bool IsPCRel, bool IsRelocWithSymbol,
|
|
int64_t Addend) const;
|
|
virtual unsigned getEFlags() const;
|
|
virtual const MCSymbol *ExplicitRelSym(const MCAssembler &Asm,
|
|
const MCValue &Target,
|
|
const MCFragment &F,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel) const;
|
|
};
|
|
}
|
|
|
|
ARMELFObjectWriter::ARMELFObjectWriter(uint8_t OSABI)
|
|
: MCELFObjectTargetWriter(/*Is64Bit*/ false, OSABI,
|
|
ELF::EM_ARM,
|
|
/*HasRelocationAddend*/ false) {}
|
|
|
|
ARMELFObjectWriter::~ARMELFObjectWriter() {}
|
|
|
|
// FIXME: get the real EABI Version from the Triple.
|
|
unsigned ARMELFObjectWriter::getEFlags() const {
|
|
return ELF::EF_ARM_EABIMASK & DefaultEABIVersion;
|
|
}
|
|
|
|
// In ARM, _MergedGlobals and other most symbols get emitted directly.
|
|
// I.e. not as an offset to a section symbol.
|
|
// This code is an approximation of what ARM/gcc does.
|
|
|
|
STATISTIC(PCRelCount, "Total number of PIC Relocations");
|
|
STATISTIC(NonPCRelCount, "Total number of non-PIC relocations");
|
|
|
|
const MCSymbol *ARMELFObjectWriter::ExplicitRelSym(const MCAssembler &Asm,
|
|
const MCValue &Target,
|
|
const MCFragment &F,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel) const {
|
|
const MCSymbol &Symbol = Target.getSymA()->getSymbol().AliasedSymbol();
|
|
bool EmitThisSym = false;
|
|
|
|
const MCSectionELF &Section =
|
|
static_cast<const MCSectionELF&>(Symbol.getSection());
|
|
bool InNormalSection = true;
|
|
unsigned RelocType = 0;
|
|
RelocType = GetRelocTypeInner(Target, Fixup, IsPCRel);
|
|
|
|
DEBUG(
|
|
const MCSymbolRefExpr::VariantKind Kind = Target.getSymA()->getKind();
|
|
MCSymbolRefExpr::VariantKind Kind2;
|
|
Kind2 = Target.getSymB() ? Target.getSymB()->getKind() :
|
|
MCSymbolRefExpr::VK_None;
|
|
dbgs() << "considering symbol "
|
|
<< Section.getSectionName() << "/"
|
|
<< Symbol.getName() << "/"
|
|
<< " Rel:" << (unsigned)RelocType
|
|
<< " Kind: " << (int)Kind << "/" << (int)Kind2
|
|
<< " Tmp:"
|
|
<< Symbol.isAbsolute() << "/" << Symbol.isDefined() << "/"
|
|
<< Symbol.isVariable() << "/" << Symbol.isTemporary()
|
|
<< " Counts:" << PCRelCount << "/" << NonPCRelCount << "\n");
|
|
|
|
if (IsPCRel) { ++PCRelCount;
|
|
switch (RelocType) {
|
|
default:
|
|
// Most relocation types are emitted as explicit symbols
|
|
InNormalSection =
|
|
StringSwitch<bool>(Section.getSectionName())
|
|
.Case(".data.rel.ro.local", false)
|
|
.Case(".data.rel", false)
|
|
.Case(".bss", false)
|
|
.Default(true);
|
|
EmitThisSym = true;
|
|
break;
|
|
case ELF::R_ARM_ABS32:
|
|
// But things get strange with R_ARM_ABS32
|
|
// In this case, most things that go in .rodata show up
|
|
// as section relative relocations
|
|
InNormalSection =
|
|
StringSwitch<bool>(Section.getSectionName())
|
|
.Case(".data.rel.ro.local", false)
|
|
.Case(".data.rel", false)
|
|
.Case(".rodata", false)
|
|
.Case(".bss", false)
|
|
.Default(true);
|
|
EmitThisSym = false;
|
|
break;
|
|
}
|
|
} else {
|
|
NonPCRelCount++;
|
|
InNormalSection =
|
|
StringSwitch<bool>(Section.getSectionName())
|
|
.Case(".data.rel.ro.local", false)
|
|
.Case(".rodata", false)
|
|
.Case(".data.rel", false)
|
|
.Case(".bss", false)
|
|
.Default(true);
|
|
|
|
switch (RelocType) {
|
|
default: EmitThisSym = true; break;
|
|
case ELF::R_ARM_ABS32: EmitThisSym = false; break;
|
|
}
|
|
}
|
|
|
|
if (EmitThisSym)
|
|
return &Symbol;
|
|
if (! Symbol.isTemporary() && InNormalSection) {
|
|
return &Symbol;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
// Need to examine the Fixup when determining whether to
|
|
// emit the relocation as an explicit symbol or as a section relative
|
|
// offset
|
|
unsigned ARMELFObjectWriter::GetRelocType(const MCValue &Target,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel,
|
|
bool IsRelocWithSymbol,
|
|
int64_t Addend) const {
|
|
return GetRelocTypeInner(Target, Fixup, IsPCRel);
|
|
}
|
|
|
|
unsigned ARMELFObjectWriter::GetRelocTypeInner(const MCValue &Target,
|
|
const MCFixup &Fixup,
|
|
bool IsPCRel) const {
|
|
MCSymbolRefExpr::VariantKind Modifier = Target.isAbsolute() ?
|
|
MCSymbolRefExpr::VK_None : Target.getSymA()->getKind();
|
|
|
|
unsigned Type = 0;
|
|
if (IsPCRel) {
|
|
switch ((unsigned)Fixup.getKind()) {
|
|
default: llvm_unreachable("Unimplemented");
|
|
case FK_Data_4:
|
|
switch (Modifier) {
|
|
default: llvm_unreachable("Unsupported Modifier");
|
|
case MCSymbolRefExpr::VK_None:
|
|
Type = ELF::R_ARM_REL32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_ARM_TLSGD:
|
|
llvm_unreachable("unimplemented");
|
|
case MCSymbolRefExpr::VK_ARM_GOTTPOFF:
|
|
Type = ELF::R_ARM_TLS_IE32;
|
|
break;
|
|
}
|
|
break;
|
|
case ARM::fixup_arm_blx:
|
|
case ARM::fixup_arm_uncondbl:
|
|
switch (Modifier) {
|
|
case MCSymbolRefExpr::VK_ARM_PLT:
|
|
Type = ELF::R_ARM_PLT32;
|
|
break;
|
|
default:
|
|
Type = ELF::R_ARM_CALL;
|
|
break;
|
|
}
|
|
break;
|
|
case ARM::fixup_arm_condbl:
|
|
case ARM::fixup_arm_condbranch:
|
|
case ARM::fixup_arm_uncondbranch:
|
|
Type = ELF::R_ARM_JUMP24;
|
|
break;
|
|
case ARM::fixup_t2_condbranch:
|
|
case ARM::fixup_t2_uncondbranch:
|
|
Type = ELF::R_ARM_THM_JUMP24;
|
|
break;
|
|
case ARM::fixup_arm_movt_hi16:
|
|
case ARM::fixup_arm_movt_hi16_pcrel:
|
|
Type = ELF::R_ARM_MOVT_PREL;
|
|
break;
|
|
case ARM::fixup_arm_movw_lo16:
|
|
case ARM::fixup_arm_movw_lo16_pcrel:
|
|
Type = ELF::R_ARM_MOVW_PREL_NC;
|
|
break;
|
|
case ARM::fixup_t2_movt_hi16:
|
|
case ARM::fixup_t2_movt_hi16_pcrel:
|
|
Type = ELF::R_ARM_THM_MOVT_PREL;
|
|
break;
|
|
case ARM::fixup_t2_movw_lo16:
|
|
case ARM::fixup_t2_movw_lo16_pcrel:
|
|
Type = ELF::R_ARM_THM_MOVW_PREL_NC;
|
|
break;
|
|
case ARM::fixup_arm_thumb_bl:
|
|
case ARM::fixup_arm_thumb_blx:
|
|
Type = ELF::R_ARM_THM_CALL;
|
|
break;
|
|
}
|
|
} else {
|
|
switch ((unsigned)Fixup.getKind()) {
|
|
default: llvm_unreachable("invalid fixup kind!");
|
|
case FK_Data_4:
|
|
switch (Modifier) {
|
|
default: llvm_unreachable("Unsupported Modifier");
|
|
case MCSymbolRefExpr::VK_ARM_GOT:
|
|
Type = ELF::R_ARM_GOT_BREL;
|
|
break;
|
|
case MCSymbolRefExpr::VK_ARM_TLSGD:
|
|
Type = ELF::R_ARM_TLS_GD32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_ARM_TPOFF:
|
|
Type = ELF::R_ARM_TLS_LE32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_ARM_GOTTPOFF:
|
|
Type = ELF::R_ARM_TLS_IE32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_None:
|
|
Type = ELF::R_ARM_ABS32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_ARM_GOTOFF:
|
|
Type = ELF::R_ARM_GOTOFF32;
|
|
break;
|
|
case MCSymbolRefExpr::VK_ARM_TARGET1:
|
|
Type = ELF::R_ARM_TARGET1;
|
|
break;
|
|
case MCSymbolRefExpr::VK_ARM_TARGET2:
|
|
Type = ELF::R_ARM_TARGET2;
|
|
break;
|
|
}
|
|
break;
|
|
case ARM::fixup_arm_ldst_pcrel_12:
|
|
case ARM::fixup_arm_pcrel_10:
|
|
case ARM::fixup_arm_adr_pcrel_12:
|
|
case ARM::fixup_arm_thumb_bl:
|
|
case ARM::fixup_arm_thumb_cb:
|
|
case ARM::fixup_arm_thumb_cp:
|
|
case ARM::fixup_arm_thumb_br:
|
|
llvm_unreachable("Unimplemented");
|
|
case ARM::fixup_arm_condbranch:
|
|
case ARM::fixup_arm_uncondbranch:
|
|
Type = ELF::R_ARM_JUMP24;
|
|
break;
|
|
case ARM::fixup_arm_movt_hi16:
|
|
Type = ELF::R_ARM_MOVT_ABS;
|
|
break;
|
|
case ARM::fixup_arm_movw_lo16:
|
|
Type = ELF::R_ARM_MOVW_ABS_NC;
|
|
break;
|
|
case ARM::fixup_t2_movt_hi16:
|
|
Type = ELF::R_ARM_THM_MOVT_ABS;
|
|
break;
|
|
case ARM::fixup_t2_movw_lo16:
|
|
Type = ELF::R_ARM_THM_MOVW_ABS_NC;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return Type;
|
|
}
|
|
|
|
MCObjectWriter *llvm::createARMELFObjectWriter(raw_ostream &OS,
|
|
uint8_t OSABI) {
|
|
MCELFObjectTargetWriter *MOTW = new ARMELFObjectWriter(OSABI);
|
|
return createELFObjectWriter(MOTW, OS, /*IsLittleEndian=*/true);
|
|
}
|