#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/ELF.h"
#include "llvm/Support/CommandLine.h"
-#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringSwitch.h"
#include "../Target/Mips/MCTargetDesc/MipsFixupKinds.h"
-#include "../Target/ARM/MCTargetDesc/ARMFixupKinds.h"
#include "../Target/PowerPC/MCTargetDesc/PPCFixupKinds.h"
#include <vector>
switch (MOTW->getEMachine()) {
case ELF::EM_386:
case ELF::EM_X86_64:
- return new ELFObjectWriter(MOTW, OS, IsLittleEndian); break;
case ELF::EM_ARM:
- return new ARMELFObjectWriter(MOTW, OS, IsLittleEndian); break;
+ return new ELFObjectWriter(MOTW, OS, IsLittleEndian); break;
case ELF::EM_MBLAZE:
return new MBlazeELFObjectWriter(MOTW, OS, IsLittleEndian); break;
case ELF::EM_PPC:
}
/// START OF SUBCLASSES for ELFObjectWriter
-//===- ARMELFObjectWriter -------------------------------------------===//
-
-ARMELFObjectWriter::ARMELFObjectWriter(MCELFObjectTargetWriter *MOTW,
- raw_ostream &_OS,
- bool IsLittleEndian)
- : ELFObjectWriter(MOTW, _OS, IsLittleEndian)
-{}
-
-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();
- 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: assert(0 && "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:
- assert(0 && "unimplemented");
- break;
- case MCSymbolRefExpr::VK_ARM_GOTTPOFF:
- Type = ELF::R_ARM_TLS_IE32;
- break;
- }
- break;
- case ARM::fixup_arm_uncondbranch:
- 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_condbranch:
- Type = ELF::R_ARM_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:
- switch (Modifier) {
- case MCSymbolRefExpr::VK_ARM_PLT:
- Type = ELF::R_ARM_THM_CALL;
- break;
- default:
- Type = ELF::R_ARM_NONE;
- break;
- }
- break;
- }
- } else {
- switch ((unsigned)Fixup.getKind()) {
- default: llvm_unreachable("invalid fixup kind!");
- case FK_Data_4:
- switch (Modifier) {
- default: llvm_unreachable("Unsupported Modifier"); break;
- 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;
- }
- 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:
- assert(0 && "Unimplemented");
- break;
- case ARM::fixup_arm_uncondbranch:
- Type = ELF::R_ARM_CALL;
- break;
- case ARM::fixup_arm_condbranch:
- 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;
-}
-
//===- PPCELFObjectWriter -------------------------------------------===//
PPCELFObjectWriter::PPCELFObjectWriter(MCELFObjectTargetWriter *MOTW,
projects / oota-llvm.git / blobdiff