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-rw-r--r--llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp28
-rw-r--r--llvm/lib/MC/MCObjectFileInfo.cpp1812
2 files changed, 935 insertions, 905 deletions
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index c9b0f9aa556..2d82f81ed70 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -964,6 +964,31 @@ void AsmPrinter::emitFrameAlloc(const MachineInstr &MI) {
MCConstantExpr::create(FrameOffset, OutContext));
}
+void AsmPrinter::emitStackSizeSection(const MachineFunction &MF) {
+ if (!MF.getTarget().Options.EmitStackSizeSection)
+ return;
+
+ MCSection *StackSizeSection = getObjFileLowering().getStackSizesSection();
+ if (!StackSizeSection)
+ return;
+
+ const MachineFrameInfo &FrameInfo = MF.getFrameInfo();
+ // Don't emit functions with dynamic stack allocations.
+ if (FrameInfo.hasVarSizedObjects())
+ return;
+
+ OutStreamer->PushSection();
+ OutStreamer->SwitchSection(StackSizeSection);
+
+ const MCSymbol *FunctionSymbol = getSymbol(MF.getFunction());
+ uint64_t StackSize = FrameInfo.getStackSize();
+ OutStreamer->EmitValue(MCSymbolRefExpr::create(FunctionSymbol, OutContext),
+ /* size = */ 8);
+ OutStreamer->EmitULEB128IntValue(StackSize);
+
+ OutStreamer->PopSection();
+}
+
static bool needFuncLabelsForEHOrDebugInfo(const MachineFunction &MF,
MachineModuleInfo *MMI) {
if (!MF.getLandingPads().empty() || MF.hasEHFunclets() || MMI->hasDebugInfo())
@@ -1135,6 +1160,9 @@ void AsmPrinter::EmitFunctionBody() {
HI.Handler->endFunction(MF);
}
+ // Emit section containing stack size metadata.
+ emitStackSizeSection(*MF);
+
if (isVerbose())
OutStreamer->GetCommentOS() << "-- End function\n";
diff --git a/llvm/lib/MC/MCObjectFileInfo.cpp b/llvm/lib/MC/MCObjectFileInfo.cpp
index d8077df1469..05508cf9438 100644
--- a/llvm/lib/MC/MCObjectFileInfo.cpp
+++ b/llvm/lib/MC/MCObjectFileInfo.cpp
@@ -1,905 +1,907 @@
-//===-- MCObjectFileInfo.cpp - Object File Information --------------------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-
-#include "llvm/MC/MCObjectFileInfo.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/Triple.h"
-#include "llvm/BinaryFormat/COFF.h"
-#include "llvm/BinaryFormat/ELF.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCContext.h"
-#include "llvm/MC/MCSection.h"
-#include "llvm/MC/MCSectionCOFF.h"
-#include "llvm/MC/MCSectionELF.h"
-#include "llvm/MC/MCSectionMachO.h"
-#include "llvm/MC/MCSectionWasm.h"
-
-using namespace llvm;
-
-static bool useCompactUnwind(const Triple &T) {
- // Only on darwin.
- if (!T.isOSDarwin())
- return false;
-
- // aarch64 always has it.
- if (T.getArch() == Triple::aarch64)
- return true;
-
- // armv7k always has it.
- if (T.isWatchABI())
- return true;
-
- // Use it on newer version of OS X.
- if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
- return true;
-
- // And the iOS simulator.
- if (T.isiOS() &&
- (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86))
- return true;
-
- return false;
-}
-
-void MCObjectFileInfo::initMachOMCObjectFileInfo(const Triple &T) {
- // MachO
- SupportsWeakOmittedEHFrame = false;
-
- EHFrameSection = Ctx->getMachOSection(
- "__TEXT", "__eh_frame",
- MachO::S_COALESCED | MachO::S_ATTR_NO_TOC |
- MachO::S_ATTR_STRIP_STATIC_SYMS | MachO::S_ATTR_LIVE_SUPPORT,
- SectionKind::getReadOnly());
-
- if (T.isOSDarwin() && T.getArch() == Triple::aarch64)
- SupportsCompactUnwindWithoutEHFrame = true;
-
- if (T.isWatchABI())
- OmitDwarfIfHaveCompactUnwind = true;
-
- PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel
- | dwarf::DW_EH_PE_sdata4;
- LSDAEncoding = FDECFIEncoding = dwarf::DW_EH_PE_pcrel;
- TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata4;
-
- // .comm doesn't support alignment before Leopard.
- if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5))
- CommDirectiveSupportsAlignment = false;
-
- TextSection // .text
- = Ctx->getMachOSection("__TEXT", "__text",
- MachO::S_ATTR_PURE_INSTRUCTIONS,
- SectionKind::getText());
- DataSection // .data
- = Ctx->getMachOSection("__DATA", "__data", 0, SectionKind::getData());
-
- // BSSSection might not be expected initialized on msvc.
- BSSSection = nullptr;
-
- TLSDataSection // .tdata
- = Ctx->getMachOSection("__DATA", "__thread_data",
- MachO::S_THREAD_LOCAL_REGULAR,
- SectionKind::getData());
- TLSBSSSection // .tbss
- = Ctx->getMachOSection("__DATA", "__thread_bss",
- MachO::S_THREAD_LOCAL_ZEROFILL,
- SectionKind::getThreadBSS());
-
- // TODO: Verify datarel below.
- TLSTLVSection // .tlv
- = Ctx->getMachOSection("__DATA", "__thread_vars",
- MachO::S_THREAD_LOCAL_VARIABLES,
- SectionKind::getData());
-
- TLSThreadInitSection = Ctx->getMachOSection(
- "__DATA", "__thread_init", MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
- SectionKind::getData());
-
- CStringSection // .cstring
- = Ctx->getMachOSection("__TEXT", "__cstring",
- MachO::S_CSTRING_LITERALS,
- SectionKind::getMergeable1ByteCString());
- UStringSection
- = Ctx->getMachOSection("__TEXT","__ustring", 0,
- SectionKind::getMergeable2ByteCString());
- FourByteConstantSection // .literal4
- = Ctx->getMachOSection("__TEXT", "__literal4",
- MachO::S_4BYTE_LITERALS,
- SectionKind::getMergeableConst4());
- EightByteConstantSection // .literal8
- = Ctx->getMachOSection("__TEXT", "__literal8",
- MachO::S_8BYTE_LITERALS,
- SectionKind::getMergeableConst8());
-
- SixteenByteConstantSection // .literal16
- = Ctx->getMachOSection("__TEXT", "__literal16",
- MachO::S_16BYTE_LITERALS,
- SectionKind::getMergeableConst16());
-
- ReadOnlySection // .const
- = Ctx->getMachOSection("__TEXT", "__const", 0,
- SectionKind::getReadOnly());
-
- // If the target is not powerpc, map the coal sections to the non-coal
- // sections.
- //
- // "__TEXT/__textcoal_nt" => section "__TEXT/__text"
- // "__TEXT/__const_coal" => section "__TEXT/__const"
- // "__DATA/__datacoal_nt" => section "__DATA/__data"
- Triple::ArchType ArchTy = T.getArch();
-
- if (ArchTy == Triple::ppc || ArchTy == Triple::ppc64) {
- TextCoalSection
- = Ctx->getMachOSection("__TEXT", "__textcoal_nt",
- MachO::S_COALESCED |
- MachO::S_ATTR_PURE_INSTRUCTIONS,
- SectionKind::getText());
- ConstTextCoalSection
- = Ctx->getMachOSection("__TEXT", "__const_coal",
- MachO::S_COALESCED,
- SectionKind::getReadOnly());
- DataCoalSection = Ctx->getMachOSection(
- "__DATA", "__datacoal_nt", MachO::S_COALESCED, SectionKind::getData());
- } else {
- TextCoalSection = TextSection;
- ConstTextCoalSection = ReadOnlySection;
- DataCoalSection = DataSection;
- }
-
- ConstDataSection // .const_data
- = Ctx->getMachOSection("__DATA", "__const", 0,
- SectionKind::getReadOnlyWithRel());
- DataCommonSection
- = Ctx->getMachOSection("__DATA","__common",
- MachO::S_ZEROFILL,
- SectionKind::getBSS());
- DataBSSSection
- = Ctx->getMachOSection("__DATA","__bss", MachO::S_ZEROFILL,
- SectionKind::getBSS());
-
-
- LazySymbolPointerSection
- = Ctx->getMachOSection("__DATA", "__la_symbol_ptr",
- MachO::S_LAZY_SYMBOL_POINTERS,
- SectionKind::getMetadata());
- NonLazySymbolPointerSection
- = Ctx->getMachOSection("__DATA", "__nl_symbol_ptr",
- MachO::S_NON_LAZY_SYMBOL_POINTERS,
- SectionKind::getMetadata());
-
- ThreadLocalPointerSection
- = Ctx->getMachOSection("__DATA", "__thread_ptr",
- MachO::S_THREAD_LOCAL_VARIABLE_POINTERS,
- SectionKind::getMetadata());
-
- // Exception Handling.
- LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0,
- SectionKind::getReadOnlyWithRel());
-
- COFFDebugSymbolsSection = nullptr;
- COFFDebugTypesSection = nullptr;
-
- if (useCompactUnwind(T)) {
- CompactUnwindSection =
- Ctx->getMachOSection("__LD", "__compact_unwind", MachO::S_ATTR_DEBUG,
- SectionKind::getReadOnly());
-
- if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)
- CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_X86_64_MODE_DWARF
- else if (T.getArch() == Triple::aarch64)
- CompactUnwindDwarfEHFrameOnly = 0x03000000; // UNWIND_ARM64_MODE_DWARF
- else if (T.getArch() == Triple::arm || T.getArch() == Triple::thumb)
- CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_ARM_MODE_DWARF
- }
-
- // Debug Information.
- DwarfAccelNamesSection =
- Ctx->getMachOSection("__DWARF", "__apple_names", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "names_begin");
- DwarfAccelObjCSection =
- Ctx->getMachOSection("__DWARF", "__apple_objc", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "objc_begin");
- // 16 character section limit...
- DwarfAccelNamespaceSection =
- Ctx->getMachOSection("__DWARF", "__apple_namespac", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "namespac_begin");
- DwarfAccelTypesSection =
- Ctx->getMachOSection("__DWARF", "__apple_types", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "types_begin");
-
- DwarfSwiftASTSection =
- Ctx->getMachOSection("__DWARF", "__swift_ast", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
-
- DwarfAbbrevSection =
- Ctx->getMachOSection("__DWARF", "__debug_abbrev", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "section_abbrev");
- DwarfInfoSection =
- Ctx->getMachOSection("__DWARF", "__debug_info", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "section_info");
- DwarfLineSection =
- Ctx->getMachOSection("__DWARF", "__debug_line", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "section_line");
- DwarfFrameSection =
- Ctx->getMachOSection("__DWARF", "__debug_frame", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfPubNamesSection =
- Ctx->getMachOSection("__DWARF", "__debug_pubnames", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfPubTypesSection =
- Ctx->getMachOSection("__DWARF", "__debug_pubtypes", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfGnuPubNamesSection =
- Ctx->getMachOSection("__DWARF", "__debug_gnu_pubn", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfGnuPubTypesSection =
- Ctx->getMachOSection("__DWARF", "__debug_gnu_pubt", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfStrSection =
- Ctx->getMachOSection("__DWARF", "__debug_str", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "info_string");
- DwarfStrOffSection =
- Ctx->getMachOSection("__DWARF", "__debug_str_offs", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "section_str_off");
- DwarfLocSection =
- Ctx->getMachOSection("__DWARF", "__debug_loc", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "section_debug_loc");
- DwarfARangesSection =
- Ctx->getMachOSection("__DWARF", "__debug_aranges", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfRangesSection =
- Ctx->getMachOSection("__DWARF", "__debug_ranges", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "debug_range");
- DwarfMacinfoSection =
- Ctx->getMachOSection("__DWARF", "__debug_macinfo", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata(), "debug_macinfo");
- DwarfDebugInlineSection =
- Ctx->getMachOSection("__DWARF", "__debug_inlined", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfCUIndexSection =
- Ctx->getMachOSection("__DWARF", "__debug_cu_index", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- DwarfTUIndexSection =
- Ctx->getMachOSection("__DWARF", "__debug_tu_index", MachO::S_ATTR_DEBUG,
- SectionKind::getMetadata());
- StackMapSection = Ctx->getMachOSection("__LLVM_STACKMAPS", "__llvm_stackmaps",
- 0, SectionKind::getMetadata());
-
- FaultMapSection = Ctx->getMachOSection("__LLVM_FAULTMAPS", "__llvm_faultmaps",
- 0, SectionKind::getMetadata());
-
- TLSExtraDataSection = TLSTLVSection;
-}
-
-void MCObjectFileInfo::initELFMCObjectFileInfo(const Triple &T, bool Large) {
- switch (T.getArch()) {
- case Triple::mips:
- case Triple::mipsel:
- FDECFIEncoding = dwarf::DW_EH_PE_sdata4;
- break;
- case Triple::mips64:
- case Triple::mips64el:
- FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
- break;
- case Triple::x86_64:
- FDECFIEncoding = dwarf::DW_EH_PE_pcrel |
- (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
- break;
- case Triple::bpfel:
- case Triple::bpfeb:
- FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
- break;
- default:
- FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
- break;
- }
-
- switch (T.getArch()) {
- case Triple::arm:
- case Triple::armeb:
- case Triple::thumb:
- case Triple::thumbeb:
- if (Ctx->getAsmInfo()->getExceptionHandlingType() == ExceptionHandling::ARM)
- break;
- // Fallthrough if not using EHABI
- LLVM_FALLTHROUGH;
- case Triple::ppc:
- case Triple::x86:
- PersonalityEncoding = PositionIndependent
- ? dwarf::DW_EH_PE_indirect |
- dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata4
- : dwarf::DW_EH_PE_absptr;
- LSDAEncoding = PositionIndependent
- ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
- : dwarf::DW_EH_PE_absptr;
- TTypeEncoding = PositionIndependent
- ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata4
- : dwarf::DW_EH_PE_absptr;
- break;
- case Triple::x86_64:
- if (PositionIndependent) {
- PersonalityEncoding =
- dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
- LSDAEncoding = dwarf::DW_EH_PE_pcrel |
- (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
- TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
- } else {
- PersonalityEncoding =
- Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
- LSDAEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
- TTypeEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
- }
- break;
- case Triple::hexagon:
- PersonalityEncoding = dwarf::DW_EH_PE_absptr;
- LSDAEncoding = dwarf::DW_EH_PE_absptr;
- FDECFIEncoding = dwarf::DW_EH_PE_absptr;
- TTypeEncoding = dwarf::DW_EH_PE_absptr;
- if (PositionIndependent) {
- PersonalityEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel;
- LSDAEncoding |= dwarf::DW_EH_PE_pcrel;
- FDECFIEncoding |= dwarf::DW_EH_PE_pcrel;
- TTypeEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel;
- }
- break;
- case Triple::aarch64:
- case Triple::aarch64_be:
- // The small model guarantees static code/data size < 4GB, but not where it
- // will be in memory. Most of these could end up >2GB away so even a signed
- // pc-relative 32-bit address is insufficient, theoretically.
- if (PositionIndependent) {
- PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata8;
- LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8;
- TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata8;
- } else {
- PersonalityEncoding = dwarf::DW_EH_PE_absptr;
- LSDAEncoding = dwarf::DW_EH_PE_absptr;
- TTypeEncoding = dwarf::DW_EH_PE_absptr;
- }
- break;
- case Triple::lanai:
- LSDAEncoding = dwarf::DW_EH_PE_absptr;
- PersonalityEncoding = dwarf::DW_EH_PE_absptr;
- TTypeEncoding = dwarf::DW_EH_PE_absptr;
- break;
- case Triple::mips:
- case Triple::mipsel:
- case Triple::mips64:
- case Triple::mips64el:
- // MIPS uses indirect pointer to refer personality functions and types, so
- // that the eh_frame section can be read-only. DW.ref.personality will be
- // generated for relocation.
- PersonalityEncoding = dwarf::DW_EH_PE_indirect;
- // FIXME: The N64 ABI probably ought to use DW_EH_PE_sdata8 but we can't
- // identify N64 from just a triple.
- TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata4;
- // We don't support PC-relative LSDA references in GAS so we use the default
- // DW_EH_PE_absptr for those.
-
- // FreeBSD must be explicit about the data size and using pcrel since it's
- // assembler/linker won't do the automatic conversion that the Linux tools
- // do.
- if (T.isOSFreeBSD()) {
- PersonalityEncoding |= dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
- LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
- }
- break;
- case Triple::ppc64:
- case Triple::ppc64le:
- PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_udata8;
- LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
- TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_udata8;
- break;
- case Triple::sparcel:
- case Triple::sparc:
- if (PositionIndependent) {
- LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
- PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata4;
- TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata4;
- } else {
- LSDAEncoding = dwarf::DW_EH_PE_absptr;
- PersonalityEncoding = dwarf::DW_EH_PE_absptr;
- TTypeEncoding = dwarf::DW_EH_PE_absptr;
- }
- break;
- case Triple::sparcv9:
- LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
- if (PositionIndependent) {
- PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata4;
- TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata4;
- } else {
- PersonalityEncoding = dwarf::DW_EH_PE_absptr;
- TTypeEncoding = dwarf::DW_EH_PE_absptr;
- }
- break;
- case Triple::systemz:
- // All currently-defined code models guarantee that 4-byte PC-relative
- // values will be in range.
- if (PositionIndependent) {
- PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata4;
- LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
- TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
- dwarf::DW_EH_PE_sdata4;
- } else {
- PersonalityEncoding = dwarf::DW_EH_PE_absptr;
- LSDAEncoding = dwarf::DW_EH_PE_absptr;
- TTypeEncoding = dwarf::DW_EH_PE_absptr;
- }
- break;
- default:
- break;
- }
-
- unsigned EHSectionType = T.getArch() == Triple::x86_64
- ? ELF::SHT_X86_64_UNWIND
- : ELF::SHT_PROGBITS;
-
- // Solaris requires different flags for .eh_frame to seemingly every other
- // platform.
- unsigned EHSectionFlags = ELF::SHF_ALLOC;
- if (T.isOSSolaris() && T.getArch() != Triple::x86_64)
- EHSectionFlags |= ELF::SHF_WRITE;
-
- // ELF
- BSSSection = Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
- ELF::SHF_WRITE | ELF::SHF_ALLOC);
-
- TextSection = Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
- ELF::SHF_EXECINSTR | ELF::SHF_ALLOC);
-
- DataSection = Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
- ELF::SHF_WRITE | ELF::SHF_ALLOC);
-
- ReadOnlySection =
- Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
-
- TLSDataSection =
- Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
- ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
-
- TLSBSSSection = Ctx->getELFSection(
- ".tbss", ELF::SHT_NOBITS, ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
-
- DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
- ELF::SHF_ALLOC | ELF::SHF_WRITE);
-
- MergeableConst4Section =
- Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
- ELF::SHF_ALLOC | ELF::SHF_MERGE, 4, "");
-
- MergeableConst8Section =
- Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
- ELF::SHF_ALLOC | ELF::SHF_MERGE, 8, "");
-
- MergeableConst16Section =
- Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
- ELF::SHF_ALLOC | ELF::SHF_MERGE, 16, "");
-
- MergeableConst32Section =
- Ctx->getELFSection(".rodata.cst32", ELF::SHT_PROGBITS,
- ELF::SHF_ALLOC | ELF::SHF_MERGE, 32, "");
-
- // Exception Handling Sections.
-
- // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
- // it contains relocatable pointers. In PIC mode, this is probably a big
- // runtime hit for C++ apps. Either the contents of the LSDA need to be
- // adjusted or this should be a data section.
- LSDASection = Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
- ELF::SHF_ALLOC);
-
- COFFDebugSymbolsSection = nullptr;
- COFFDebugTypesSection = nullptr;
-
- unsigned DebugSecType = ELF::SHT_PROGBITS;
-
- // MIPS .debug_* sections should have SHT_MIPS_DWARF section type
- // to distinguish among sections contain DWARF and ECOFF debug formats.
- // Sections with ECOFF debug format are obsoleted and marked by SHT_PROGBITS.
- if (T.getArch() == Triple::mips || T.getArch() == Triple::mipsel ||
- T.getArch() == Triple::mips64 || T.getArch() == Triple::mips64el)
- DebugSecType = ELF::SHT_MIPS_DWARF;
-
- // Debug Info Sections.
- DwarfAbbrevSection =
- Ctx->getELFSection(".debug_abbrev", DebugSecType, 0);
- DwarfInfoSection = Ctx->getELFSection(".debug_info", DebugSecType, 0);
- DwarfLineSection = Ctx->getELFSection(".debug_line", DebugSecType, 0);
- DwarfFrameSection = Ctx->getELFSection(".debug_frame", DebugSecType, 0);
- DwarfPubNamesSection =
- Ctx->getELFSection(".debug_pubnames", DebugSecType, 0);
- DwarfPubTypesSection =
- Ctx->getELFSection(".debug_pubtypes", DebugSecType, 0);
- DwarfGnuPubNamesSection =
- Ctx->getELFSection(".debug_gnu_pubnames", DebugSecType, 0);
- DwarfGnuPubTypesSection =
- Ctx->getELFSection(".debug_gnu_pubtypes", DebugSecType, 0);
- DwarfStrSection =
- Ctx->getELFSection(".debug_str", DebugSecType,
- ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
- DwarfLocSection = Ctx->getELFSection(".debug_loc", DebugSecType, 0);
- DwarfARangesSection =
- Ctx->getELFSection(".debug_aranges", DebugSecType, 0);
- DwarfRangesSection =
- Ctx->getELFSection(".debug_ranges", DebugSecType, 0);
- DwarfMacinfoSection =
- Ctx->getELFSection(".debug_macinfo", DebugSecType, 0);
-
- // DWARF5 Experimental Debug Info
-
- // Accelerator Tables
- DwarfAccelNamesSection =
- Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0);
- DwarfAccelObjCSection =
- Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0);
- DwarfAccelNamespaceSection =
- Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0);
- DwarfAccelTypesSection =
- Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0);
-
- // String Offset and Address Sections
- DwarfStrOffSection =
- Ctx->getELFSection(".debug_str_offsets", DebugSecType, 0);
- DwarfAddrSection = Ctx->getELFSection(".debug_addr", DebugSecType, 0);
-
- // Fission Sections
- DwarfInfoDWOSection =
- Ctx->getELFSection(".debug_info.dwo", DebugSecType, 0);
- DwarfTypesDWOSection =
- Ctx->getELFSection(".debug_types.dwo", DebugSecType, 0);
- DwarfAbbrevDWOSection =
- Ctx->getELFSection(".debug_abbrev.dwo", DebugSecType, 0);
- DwarfStrDWOSection =
- Ctx->getELFSection(".debug_str.dwo", DebugSecType,
- ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
- DwarfLineDWOSection =
- Ctx->getELFSection(".debug_line.dwo", DebugSecType, 0);
- DwarfLocDWOSection =
- Ctx->getELFSection(".debug_loc.dwo", DebugSecType, 0);
- DwarfStrOffDWOSection =
- Ctx->getELFSection(".debug_str_offsets.dwo", DebugSecType, 0);
-
- // DWP Sections
- DwarfCUIndexSection =
- Ctx->getELFSection(".debug_cu_index", DebugSecType, 0);
- DwarfTUIndexSection =
- Ctx->getELFSection(".debug_tu_index", DebugSecType, 0);
-
- StackMapSection =
- Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
-
- FaultMapSection =
- Ctx->getELFSection(".llvm_faultmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
-
- EHFrameSection =
- Ctx->getELFSection(".eh_frame", EHSectionType, EHSectionFlags);
-}
-
-void MCObjectFileInfo::initCOFFMCObjectFileInfo(const Triple &T) {
- EHFrameSection = Ctx->getCOFFSection(
- ".eh_frame", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getData());
-
- // Set the `IMAGE_SCN_MEM_16BIT` flag when compiling for thumb mode. This is
- // used to indicate to the linker that the text segment contains thumb instructions
- // and to set the ISA selection bit for calls accordingly.
- const bool IsThumb = T.getArch() == Triple::thumb;
-
- CommDirectiveSupportsAlignment = true;
-
- // COFF
- BSSSection = Ctx->getCOFFSection(
- ".bss", COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getBSS());
- TextSection = Ctx->getCOFFSection(
- ".text",
- (IsThumb ? COFF::IMAGE_SCN_MEM_16BIT : (COFF::SectionCharacteristics)0) |
- COFF::IMAGE_SCN_CNT_CODE | COFF::IMAGE_SCN_MEM_EXECUTE |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getText());
- DataSection = Ctx->getCOFFSection(
- ".data", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |
- COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getData());
- ReadOnlySection = Ctx->getCOFFSection(
- ".rdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getReadOnly());
-
- // FIXME: We're emitting LSDA info into a readonly section on COFF, even
- // though it contains relocatable pointers. In PIC mode, this is probably a
- // big runtime hit for C++ apps. Either the contents of the LSDA need to be
- // adjusted or this should be a data section.
- if (T.getArch() == Triple::x86_64) {
- // On Windows 64 with SEH, the LSDA is emitted into the .xdata section
- LSDASection = nullptr;
- } else {
- LSDASection = Ctx->getCOFFSection(".gcc_except_table",
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getReadOnly());
- }
-
- // Debug info.
- COFFDebugSymbolsSection =
- Ctx->getCOFFSection(".debug$S", (COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ),
- SectionKind::getMetadata());
- COFFDebugTypesSection =
- Ctx->getCOFFSection(".debug$T", (COFF::IMAGE_SCN_MEM_DISCARDABLE |
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ),
- SectionKind::getMetadata());
-
- DwarfAbbrevSection = Ctx->getCOFFSection(
- ".debug_abbrev",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "section_abbrev");
- DwarfInfoSection = Ctx->getCOFFSection(
- ".debug_info",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "section_info");
- DwarfLineSection = Ctx->getCOFFSection(
- ".debug_line",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "section_line");
-
- DwarfFrameSection = Ctx->getCOFFSection(
- ".debug_frame",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfPubNamesSection = Ctx->getCOFFSection(
- ".debug_pubnames",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfPubTypesSection = Ctx->getCOFFSection(
- ".debug_pubtypes",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfGnuPubNamesSection = Ctx->getCOFFSection(
- ".debug_gnu_pubnames",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfGnuPubTypesSection = Ctx->getCOFFSection(
- ".debug_gnu_pubtypes",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfStrSection = Ctx->getCOFFSection(
- ".debug_str",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "info_string");
- DwarfStrOffSection = Ctx->getCOFFSection(
- ".debug_str_offsets",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "section_str_off");
- DwarfLocSection = Ctx->getCOFFSection(
- ".debug_loc",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "section_debug_loc");
- DwarfARangesSection = Ctx->getCOFFSection(
- ".debug_aranges",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfRangesSection = Ctx->getCOFFSection(
- ".debug_ranges",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "debug_range");
- DwarfMacinfoSection = Ctx->getCOFFSection(
- ".debug_macinfo",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "debug_macinfo");
- DwarfInfoDWOSection = Ctx->getCOFFSection(
- ".debug_info.dwo",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "section_info_dwo");
- DwarfTypesDWOSection = Ctx->getCOFFSection(
- ".debug_types.dwo",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "section_types_dwo");
- DwarfAbbrevDWOSection = Ctx->getCOFFSection(
- ".debug_abbrev.dwo",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "section_abbrev_dwo");
- DwarfStrDWOSection = Ctx->getCOFFSection(
- ".debug_str.dwo",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "skel_string");
- DwarfLineDWOSection = Ctx->getCOFFSection(
- ".debug_line.dwo",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfLocDWOSection = Ctx->getCOFFSection(
- ".debug_loc.dwo",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "skel_loc");
- DwarfStrOffDWOSection = Ctx->getCOFFSection(
- ".debug_str_offsets.dwo",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "section_str_off_dwo");
- DwarfAddrSection = Ctx->getCOFFSection(
- ".debug_addr",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "addr_sec");
- DwarfCUIndexSection = Ctx->getCOFFSection(
- ".debug_cu_index",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfTUIndexSection = Ctx->getCOFFSection(
- ".debug_tu_index",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata());
- DwarfAccelNamesSection = Ctx->getCOFFSection(
- ".apple_names",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "names_begin");
- DwarfAccelNamespaceSection = Ctx->getCOFFSection(
- ".apple_namespaces",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "namespac_begin");
- DwarfAccelTypesSection = Ctx->getCOFFSection(
- ".apple_types",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "types_begin");
- DwarfAccelObjCSection = Ctx->getCOFFSection(
- ".apple_objc",
- COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getMetadata(), "objc_begin");
-
- DrectveSection = Ctx->getCOFFSection(
- ".drectve", COFF::IMAGE_SCN_LNK_INFO | COFF::IMAGE_SCN_LNK_REMOVE,
- SectionKind::getMetadata());
-
- PDataSection = Ctx->getCOFFSection(
- ".pdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getData());
-
- XDataSection = Ctx->getCOFFSection(
- ".xdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getData());
-
- SXDataSection = Ctx->getCOFFSection(".sxdata", COFF::IMAGE_SCN_LNK_INFO,
- SectionKind::getMetadata());
-
- TLSDataSection = Ctx->getCOFFSection(
- ".tls$", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |
- COFF::IMAGE_SCN_MEM_WRITE,
- SectionKind::getData());
-
- StackMapSection = Ctx->getCOFFSection(".llvm_stackmaps",
- COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
- COFF::IMAGE_SCN_MEM_READ,
- SectionKind::getReadOnly());
-}
-
-void MCObjectFileInfo::initWasmMCObjectFileInfo(const Triple &T) {
- // TODO: Set the section types and flags.
- TextSection = Ctx->getWasmSection(".text", SectionKind::getText());
- DataSection = Ctx->getWasmSection(".data", SectionKind::getData());
-
- // TODO: Set the section types and flags.
- DwarfLineSection = Ctx->getWasmSection(".debug_line", SectionKind::getMetadata());
- DwarfStrSection = Ctx->getWasmSection(".debug_str", SectionKind::getMetadata());
- DwarfLocSection = Ctx->getWasmSection(".debug_loc", SectionKind::getMetadata());
- DwarfAbbrevSection = Ctx->getWasmSection(".debug_abbrev", SectionKind::getMetadata(), "section_abbrev");
- DwarfARangesSection = Ctx->getWasmSection(".debug_aranges", SectionKind::getMetadata());
- DwarfRangesSection = Ctx->getWasmSection(".debug_ranges", SectionKind::getMetadata(), "debug_range");
- DwarfMacinfoSection = Ctx->getWasmSection(".debug_macinfo", SectionKind::getMetadata(), "debug_macinfo");
- DwarfAddrSection = Ctx->getWasmSection(".debug_addr", SectionKind::getMetadata());
- DwarfCUIndexSection = Ctx->getWasmSection(".debug_cu_index", SectionKind::getMetadata());
- DwarfTUIndexSection = Ctx->getWasmSection(".debug_tu_index", SectionKind::getMetadata());
- DwarfInfoSection = Ctx->getWasmSection(".debug_info", SectionKind::getMetadata(), "section_info");
- DwarfFrameSection = Ctx->getWasmSection(".debug_frame", SectionKind::getMetadata());
- DwarfPubNamesSection = Ctx->getWasmSection(".debug_pubnames", SectionKind::getMetadata());
- DwarfPubTypesSection = Ctx->getWasmSection(".debug_pubtypes", SectionKind::getMetadata());
-
- // TODO: Define more sections.
-}
-
-void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, bool PIC,
- MCContext &ctx,
- bool LargeCodeModel) {
- PositionIndependent = PIC;
- Ctx = &ctx;
-
- // Common.
- CommDirectiveSupportsAlignment = true;
- SupportsWeakOmittedEHFrame = true;
- SupportsCompactUnwindWithoutEHFrame = false;
- OmitDwarfIfHaveCompactUnwind = false;
-
- PersonalityEncoding = LSDAEncoding = FDECFIEncoding = TTypeEncoding =
- dwarf::DW_EH_PE_absptr;
-
- CompactUnwindDwarfEHFrameOnly = 0;
-
- EHFrameSection = nullptr; // Created on demand.
- CompactUnwindSection = nullptr; // Used only by selected targets.
- DwarfAccelNamesSection = nullptr; // Used only by selected targets.
- DwarfAccelObjCSection = nullptr; // Used only by selected targets.
- DwarfAccelNamespaceSection = nullptr; // Used only by selected targets.
- DwarfAccelTypesSection = nullptr; // Used only by selected targets.
-
- TT = TheTriple;
-
- switch (TT.getObjectFormat()) {
- case Triple::MachO:
- Env = IsMachO;
- initMachOMCObjectFileInfo(TT);
- break;
- case Triple::COFF:
- if (!TT.isOSWindows())
- report_fatal_error(
- "Cannot initialize MC for non-Windows COFF object files.");
-
- Env = IsCOFF;
- initCOFFMCObjectFileInfo(TT);
- break;
- case Triple::ELF:
- Env = IsELF;
- initELFMCObjectFileInfo(TT, LargeCodeModel);
- break;
- case Triple::Wasm:
- Env = IsWasm;
- initWasmMCObjectFileInfo(TT);
- break;
- case Triple::UnknownObjectFormat:
- report_fatal_error("Cannot initialize MC for unknown object file format.");
- break;
- }
-}
-
-MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const {
- return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP,
- 0, utostr(Hash));
-}
+//===-- MCObjectFileInfo.cpp - Object File Information --------------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/MC/MCObjectFileInfo.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/BinaryFormat/COFF.h"
+#include "llvm/BinaryFormat/ELF.h"
+#include "llvm/MC/MCAsmInfo.h"
+#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCSection.h"
+#include "llvm/MC/MCSectionCOFF.h"
+#include "llvm/MC/MCSectionELF.h"
+#include "llvm/MC/MCSectionMachO.h"
+#include "llvm/MC/MCSectionWasm.h"
+
+using namespace llvm;
+
+static bool useCompactUnwind(const Triple &T) {
+ // Only on darwin.
+ if (!T.isOSDarwin())
+ return false;
+
+ // aarch64 always has it.
+ if (T.getArch() == Triple::aarch64)
+ return true;
+
+ // armv7k always has it.
+ if (T.isWatchABI())
+ return true;
+
+ // Use it on newer version of OS X.
+ if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
+ return true;
+
+ // And the iOS simulator.
+ if (T.isiOS() &&
+ (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86))
+ return true;
+
+ return false;
+}
+
+void MCObjectFileInfo::initMachOMCObjectFileInfo(const Triple &T) {
+ // MachO
+ SupportsWeakOmittedEHFrame = false;
+
+ EHFrameSection = Ctx->getMachOSection(
+ "__TEXT", "__eh_frame",
+ MachO::S_COALESCED | MachO::S_ATTR_NO_TOC |
+ MachO::S_ATTR_STRIP_STATIC_SYMS | MachO::S_ATTR_LIVE_SUPPORT,
+ SectionKind::getReadOnly());
+
+ if (T.isOSDarwin() && T.getArch() == Triple::aarch64)
+ SupportsCompactUnwindWithoutEHFrame = true;
+
+ if (T.isWatchABI())
+ OmitDwarfIfHaveCompactUnwind = true;
+
+ PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel
+ | dwarf::DW_EH_PE_sdata4;
+ LSDAEncoding = FDECFIEncoding = dwarf::DW_EH_PE_pcrel;
+ TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata4;
+
+ // .comm doesn't support alignment before Leopard.
+ if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5))
+ CommDirectiveSupportsAlignment = false;
+
+ TextSection // .text
+ = Ctx->getMachOSection("__TEXT", "__text",
+ MachO::S_ATTR_PURE_INSTRUCTIONS,
+ SectionKind::getText());
+ DataSection // .data
+ = Ctx->getMachOSection("__DATA", "__data", 0, SectionKind::getData());
+
+ // BSSSection might not be expected initialized on msvc.
+ BSSSection = nullptr;
+
+ TLSDataSection // .tdata
+ = Ctx->getMachOSection("__DATA", "__thread_data",
+ MachO::S_THREAD_LOCAL_REGULAR,
+ SectionKind::getData());
+ TLSBSSSection // .tbss
+ = Ctx->getMachOSection("__DATA", "__thread_bss",
+ MachO::S_THREAD_LOCAL_ZEROFILL,
+ SectionKind::getThreadBSS());
+
+ // TODO: Verify datarel below.
+ TLSTLVSection // .tlv
+ = Ctx->getMachOSection("__DATA", "__thread_vars",
+ MachO::S_THREAD_LOCAL_VARIABLES,
+ SectionKind::getData());
+
+ TLSThreadInitSection = Ctx->getMachOSection(
+ "__DATA", "__thread_init", MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
+ SectionKind::getData());
+
+ CStringSection // .cstring
+ = Ctx->getMachOSection("__TEXT", "__cstring",
+ MachO::S_CSTRING_LITERALS,
+ SectionKind::getMergeable1ByteCString());
+ UStringSection
+ = Ctx->getMachOSection("__TEXT","__ustring", 0,
+ SectionKind::getMergeable2ByteCString());
+ FourByteConstantSection // .literal4
+ = Ctx->getMachOSection("__TEXT", "__literal4",
+ MachO::S_4BYTE_LITERALS,
+ SectionKind::getMergeableConst4());
+ EightByteConstantSection // .literal8
+ = Ctx->getMachOSection("__TEXT", "__literal8",
+ MachO::S_8BYTE_LITERALS,
+ SectionKind::getMergeableConst8());
+
+ SixteenByteConstantSection // .literal16
+ = Ctx->getMachOSection("__TEXT", "__literal16",
+ MachO::S_16BYTE_LITERALS,
+ SectionKind::getMergeableConst16());
+
+ ReadOnlySection // .const
+ = Ctx->getMachOSection("__TEXT", "__const", 0,
+ SectionKind::getReadOnly());
+
+ // If the target is not powerpc, map the coal sections to the non-coal
+ // sections.
+ //
+ // "__TEXT/__textcoal_nt" => section "__TEXT/__text"
+ // "__TEXT/__const_coal" => section "__TEXT/__const"
+ // "__DATA/__datacoal_nt" => section "__DATA/__data"
+ Triple::ArchType ArchTy = T.getArch();
+
+ if (ArchTy == Triple::ppc || ArchTy == Triple::ppc64) {
+ TextCoalSection
+ = Ctx->getMachOSection("__TEXT", "__textcoal_nt",
+ MachO::S_COALESCED |
+ MachO::S_ATTR_PURE_INSTRUCTIONS,
+ SectionKind::getText());
+ ConstTextCoalSection
+ = Ctx->getMachOSection("__TEXT", "__const_coal",
+ MachO::S_COALESCED,
+ SectionKind::getReadOnly());
+ DataCoalSection = Ctx->getMachOSection(
+ "__DATA", "__datacoal_nt", MachO::S_COALESCED, SectionKind::getData());
+ } else {
+ TextCoalSection = TextSection;
+ ConstTextCoalSection = ReadOnlySection;
+ DataCoalSection = DataSection;
+ }
+
+ ConstDataSection // .const_data
+ = Ctx->getMachOSection("__DATA", "__const", 0,
+ SectionKind::getReadOnlyWithRel());
+ DataCommonSection
+ = Ctx->getMachOSection("__DATA","__common",
+ MachO::S_ZEROFILL,
+ SectionKind::getBSS());
+ DataBSSSection
+ = Ctx->getMachOSection("__DATA","__bss", MachO::S_ZEROFILL,
+ SectionKind::getBSS());
+
+
+ LazySymbolPointerSection
+ = Ctx->getMachOSection("__DATA", "__la_symbol_ptr",
+ MachO::S_LAZY_SYMBOL_POINTERS,
+ SectionKind::getMetadata());
+ NonLazySymbolPointerSection
+ = Ctx->getMachOSection("__DATA", "__nl_symbol_ptr",
+ MachO::S_NON_LAZY_SYMBOL_POINTERS,
+ SectionKind::getMetadata());
+
+ ThreadLocalPointerSection
+ = Ctx->getMachOSection("__DATA", "__thread_ptr",
+ MachO::S_THREAD_LOCAL_VARIABLE_POINTERS,
+ SectionKind::getMetadata());
+
+ // Exception Handling.
+ LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0,
+ SectionKind::getReadOnlyWithRel());
+
+ COFFDebugSymbolsSection = nullptr;
+ COFFDebugTypesSection = nullptr;
+
+ if (useCompactUnwind(T)) {
+ CompactUnwindSection =
+ Ctx->getMachOSection("__LD", "__compact_unwind", MachO::S_ATTR_DEBUG,
+ SectionKind::getReadOnly());
+
+ if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)
+ CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_X86_64_MODE_DWARF
+ else if (T.getArch() == Triple::aarch64)
+ CompactUnwindDwarfEHFrameOnly = 0x03000000; // UNWIND_ARM64_MODE_DWARF
+ else if (T.getArch() == Triple::arm || T.getArch() == Triple::thumb)
+ CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_ARM_MODE_DWARF
+ }
+
+ // Debug Information.
+ DwarfAccelNamesSection =
+ Ctx->getMachOSection("__DWARF", "__apple_names", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "names_begin");
+ DwarfAccelObjCSection =
+ Ctx->getMachOSection("__DWARF", "__apple_objc", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "objc_begin");
+ // 16 character section limit...
+ DwarfAccelNamespaceSection =
+ Ctx->getMachOSection("__DWARF", "__apple_namespac", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "namespac_begin");
+ DwarfAccelTypesSection =
+ Ctx->getMachOSection("__DWARF", "__apple_types", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "types_begin");
+
+ DwarfSwiftASTSection =
+ Ctx->getMachOSection("__DWARF", "__swift_ast", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+
+ DwarfAbbrevSection =
+ Ctx->getMachOSection("__DWARF", "__debug_abbrev", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "section_abbrev");
+ DwarfInfoSection =
+ Ctx->getMachOSection("__DWARF", "__debug_info", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "section_info");
+ DwarfLineSection =
+ Ctx->getMachOSection("__DWARF", "__debug_line", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "section_line");
+ DwarfFrameSection =
+ Ctx->getMachOSection("__DWARF", "__debug_frame", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfPubNamesSection =
+ Ctx->getMachOSection("__DWARF", "__debug_pubnames", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfPubTypesSection =
+ Ctx->getMachOSection("__DWARF", "__debug_pubtypes", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfGnuPubNamesSection =
+ Ctx->getMachOSection("__DWARF", "__debug_gnu_pubn", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfGnuPubTypesSection =
+ Ctx->getMachOSection("__DWARF", "__debug_gnu_pubt", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfStrSection =
+ Ctx->getMachOSection("__DWARF", "__debug_str", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "info_string");
+ DwarfStrOffSection =
+ Ctx->getMachOSection("__DWARF", "__debug_str_offs", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "section_str_off");
+ DwarfLocSection =
+ Ctx->getMachOSection("__DWARF", "__debug_loc", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "section_debug_loc");
+ DwarfARangesSection =
+ Ctx->getMachOSection("__DWARF", "__debug_aranges", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfRangesSection =
+ Ctx->getMachOSection("__DWARF", "__debug_ranges", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "debug_range");
+ DwarfMacinfoSection =
+ Ctx->getMachOSection("__DWARF", "__debug_macinfo", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata(), "debug_macinfo");
+ DwarfDebugInlineSection =
+ Ctx->getMachOSection("__DWARF", "__debug_inlined", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfCUIndexSection =
+ Ctx->getMachOSection("__DWARF", "__debug_cu_index", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfTUIndexSection =
+ Ctx->getMachOSection("__DWARF", "__debug_tu_index", MachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ StackMapSection = Ctx->getMachOSection("__LLVM_STACKMAPS", "__llvm_stackmaps",
+ 0, SectionKind::getMetadata());
+
+ FaultMapSection = Ctx->getMachOSection("__LLVM_FAULTMAPS", "__llvm_faultmaps",
+ 0, SectionKind::getMetadata());
+
+ TLSExtraDataSection = TLSTLVSection;
+}
+
+void MCObjectFileInfo::initELFMCObjectFileInfo(const Triple &T, bool Large) {
+ switch (T.getArch()) {
+ case Triple::mips:
+ case Triple::mipsel:
+ FDECFIEncoding = dwarf::DW_EH_PE_sdata4;
+ break;
+ case Triple::mips64:
+ case Triple::mips64el:
+ FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
+ break;
+ case Triple::x86_64:
+ FDECFIEncoding = dwarf::DW_EH_PE_pcrel |
+ (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
+ break;
+ case Triple::bpfel:
+ case Triple::bpfeb:
+ FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
+ break;
+ default:
+ FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+ break;
+ }
+
+ switch (T.getArch()) {
+ case Triple::arm:
+ case Triple::armeb:
+ case Triple::thumb:
+ case Triple::thumbeb:
+ if (Ctx->getAsmInfo()->getExceptionHandlingType() == ExceptionHandling::ARM)
+ break;
+ // Fallthrough if not using EHABI
+ LLVM_FALLTHROUGH;
+ case Triple::ppc:
+ case Triple::x86:
+ PersonalityEncoding = PositionIndependent
+ ? dwarf::DW_EH_PE_indirect |
+ dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata4
+ : dwarf::DW_EH_PE_absptr;
+ LSDAEncoding = PositionIndependent
+ ? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
+ : dwarf::DW_EH_PE_absptr;
+ TTypeEncoding = PositionIndependent
+ ? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata4
+ : dwarf::DW_EH_PE_absptr;
+ break;
+ case Triple::x86_64:
+ if (PositionIndependent) {
+ PersonalityEncoding =
+ dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
+ LSDAEncoding = dwarf::DW_EH_PE_pcrel |
+ (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
+ TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
+ } else {
+ PersonalityEncoding =
+ Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
+ LSDAEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
+ TTypeEncoding = Large ? dwarf::DW_EH_PE_absptr : dwarf::DW_EH_PE_udata4;
+ }
+ break;
+ case Triple::hexagon:
+ PersonalityEncoding = dwarf::DW_EH_PE_absptr;
+ LSDAEncoding = dwarf::DW_EH_PE_absptr;
+ FDECFIEncoding = dwarf::DW_EH_PE_absptr;
+ TTypeEncoding = dwarf::DW_EH_PE_absptr;
+ if (PositionIndependent) {
+ PersonalityEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel;
+ LSDAEncoding |= dwarf::DW_EH_PE_pcrel;
+ FDECFIEncoding |= dwarf::DW_EH_PE_pcrel;
+ TTypeEncoding |= dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel;
+ }
+ break;
+ case Triple::aarch64:
+ case Triple::aarch64_be:
+ // The small model guarantees static code/data size < 4GB, but not where it
+ // will be in memory. Most of these could end up >2GB away so even a signed
+ // pc-relative 32-bit address is insufficient, theoretically.
+ if (PositionIndependent) {
+ PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata8;
+ LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8;
+ TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata8;
+ } else {
+ PersonalityEncoding = dwarf::DW_EH_PE_absptr;
+ LSDAEncoding = dwarf::DW_EH_PE_absptr;
+ TTypeEncoding = dwarf::DW_EH_PE_absptr;
+ }
+ break;
+ case Triple::lanai:
+ LSDAEncoding = dwarf::DW_EH_PE_absptr;
+ PersonalityEncoding = dwarf::DW_EH_PE_absptr;
+ TTypeEncoding = dwarf::DW_EH_PE_absptr;
+ break;
+ case Triple::mips:
+ case Triple::mipsel:
+ case Triple::mips64:
+ case Triple::mips64el:
+ // MIPS uses indirect pointer to refer personality functions and types, so
+ // that the eh_frame section can be read-only. DW.ref.personality will be
+ // generated for relocation.
+ PersonalityEncoding = dwarf::DW_EH_PE_indirect;
+ // FIXME: The N64 ABI probably ought to use DW_EH_PE_sdata8 but we can't
+ // identify N64 from just a triple.
+ TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata4;
+ // We don't support PC-relative LSDA references in GAS so we use the default
+ // DW_EH_PE_absptr for those.
+
+ // FreeBSD must be explicit about the data size and using pcrel since it's
+ // assembler/linker won't do the automatic conversion that the Linux tools
+ // do.
+ if (T.isOSFreeBSD()) {
+ PersonalityEncoding |= dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+ LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+ }
+ break;
+ case Triple::ppc64:
+ case Triple::ppc64le:
+ PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_udata8;
+ LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
+ TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_udata8;
+ break;
+ case Triple::sparcel:
+ case Triple::sparc:
+ if (PositionIndependent) {
+ LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+ PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata4;
+ TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata4;
+ } else {
+ LSDAEncoding = dwarf::DW_EH_PE_absptr;
+ PersonalityEncoding = dwarf::DW_EH_PE_absptr;
+ TTypeEncoding = dwarf::DW_EH_PE_absptr;
+ }
+ break;
+ case Triple::sparcv9:
+ LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+ if (PositionIndependent) {
+ PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata4;
+ TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata4;
+ } else {
+ PersonalityEncoding = dwarf::DW_EH_PE_absptr;
+ TTypeEncoding = dwarf::DW_EH_PE_absptr;
+ }
+ break;
+ case Triple::systemz:
+ // All currently-defined code models guarantee that 4-byte PC-relative
+ // values will be in range.
+ if (PositionIndependent) {
+ PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata4;
+ LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+ TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+ dwarf::DW_EH_PE_sdata4;
+ } else {
+ PersonalityEncoding = dwarf::DW_EH_PE_absptr;
+ LSDAEncoding = dwarf::DW_EH_PE_absptr;
+ TTypeEncoding = dwarf::DW_EH_PE_absptr;
+ }
+ break;
+ default:
+ break;
+ }
+
+ unsigned EHSectionType = T.getArch() == Triple::x86_64
+ ? ELF::SHT_X86_64_UNWIND
+ : ELF::SHT_PROGBITS;
+
+ // Solaris requires different flags for .eh_frame to seemingly every other
+ // platform.
+ unsigned EHSectionFlags = ELF::SHF_ALLOC;
+ if (T.isOSSolaris() && T.getArch() != Triple::x86_64)
+ EHSectionFlags |= ELF::SHF_WRITE;
+
+ // ELF
+ BSSSection = Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
+ ELF::SHF_WRITE | ELF::SHF_ALLOC);
+
+ TextSection = Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
+ ELF::SHF_EXECINSTR | ELF::SHF_ALLOC);
+
+ DataSection = Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
+ ELF::SHF_WRITE | ELF::SHF_ALLOC);
+
+ ReadOnlySection =
+ Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
+
+ TLSDataSection =
+ Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
+
+ TLSBSSSection = Ctx->getELFSection(
+ ".tbss", ELF::SHT_NOBITS, ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
+
+ DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC | ELF::SHF_WRITE);
+
+ MergeableConst4Section =
+ Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC | ELF::SHF_MERGE, 4, "");
+
+ MergeableConst8Section =
+ Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC | ELF::SHF_MERGE, 8, "");
+
+ MergeableConst16Section =
+ Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC | ELF::SHF_MERGE, 16, "");
+
+ MergeableConst32Section =
+ Ctx->getELFSection(".rodata.cst32", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC | ELF::SHF_MERGE, 32, "");
+
+ // Exception Handling Sections.
+
+ // FIXME: We're emitting LSDA info into a readonly section on ELF, even though
+ // it contains relocatable pointers. In PIC mode, this is probably a big
+ // runtime hit for C++ apps. Either the contents of the LSDA need to be
+ // adjusted or this should be a data section.
+ LSDASection = Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC);
+
+ COFFDebugSymbolsSection = nullptr;
+ COFFDebugTypesSection = nullptr;
+
+ unsigned DebugSecType = ELF::SHT_PROGBITS;
+
+ // MIPS .debug_* sections should have SHT_MIPS_DWARF section type
+ // to distinguish among sections contain DWARF and ECOFF debug formats.
+ // Sections with ECOFF debug format are obsoleted and marked by SHT_PROGBITS.
+ if (T.getArch() == Triple::mips || T.getArch() == Triple::mipsel ||
+ T.getArch() == Triple::mips64 || T.getArch() == Triple::mips64el)
+ DebugSecType = ELF::SHT_MIPS_DWARF;
+
+ // Debug Info Sections.
+ DwarfAbbrevSection =
+ Ctx->getELFSection(".debug_abbrev", DebugSecType, 0);
+ DwarfInfoSection = Ctx->getELFSection(".debug_info", DebugSecType, 0);
+ DwarfLineSection = Ctx->getELFSection(".debug_line", DebugSecType, 0);
+ DwarfFrameSection = Ctx->getELFSection(".debug_frame", DebugSecType, 0);
+ DwarfPubNamesSection =
+ Ctx->getELFSection(".debug_pubnames", DebugSecType, 0);
+ DwarfPubTypesSection =
+ Ctx->getELFSection(".debug_pubtypes", DebugSecType, 0);
+ DwarfGnuPubNamesSection =
+ Ctx->getELFSection(".debug_gnu_pubnames", DebugSecType, 0);
+ DwarfGnuPubTypesSection =
+ Ctx->getELFSection(".debug_gnu_pubtypes", DebugSecType, 0);
+ DwarfStrSection =
+ Ctx->getELFSection(".debug_str", DebugSecType,
+ ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
+ DwarfLocSection = Ctx->getELFSection(".debug_loc", DebugSecType, 0);
+ DwarfARangesSection =
+ Ctx->getELFSection(".debug_aranges", DebugSecType, 0);
+ DwarfRangesSection =
+ Ctx->getELFSection(".debug_ranges", DebugSecType, 0);
+ DwarfMacinfoSection =
+ Ctx->getELFSection(".debug_macinfo", DebugSecType, 0);
+
+ // DWARF5 Experimental Debug Info
+
+ // Accelerator Tables
+ DwarfAccelNamesSection =
+ Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0);
+ DwarfAccelObjCSection =
+ Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0);
+ DwarfAccelNamespaceSection =
+ Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0);
+ DwarfAccelTypesSection =
+ Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0);
+
+ // String Offset and Address Sections
+ DwarfStrOffSection =
+ Ctx->getELFSection(".debug_str_offsets", DebugSecType, 0);
+ DwarfAddrSection = Ctx->getELFSection(".debug_addr", DebugSecType, 0);
+
+ // Fission Sections
+ DwarfInfoDWOSection =
+ Ctx->getELFSection(".debug_info.dwo", DebugSecType, 0);
+ DwarfTypesDWOSection =
+ Ctx->getELFSection(".debug_types.dwo", DebugSecType, 0);
+ DwarfAbbrevDWOSection =
+ Ctx->getELFSection(".debug_abbrev.dwo", DebugSecType, 0);
+ DwarfStrDWOSection =
+ Ctx->getELFSection(".debug_str.dwo", DebugSecType,
+ ELF::SHF_MERGE | ELF::SHF_STRINGS, 1, "");
+ DwarfLineDWOSection =
+ Ctx->getELFSection(".debug_line.dwo", DebugSecType, 0);
+ DwarfLocDWOSection =
+ Ctx->getELFSection(".debug_loc.dwo", DebugSecType, 0);
+ DwarfStrOffDWOSection =
+ Ctx->getELFSection(".debug_str_offsets.dwo", DebugSecType, 0);
+
+ // DWP Sections
+ DwarfCUIndexSection =
+ Ctx->getELFSection(".debug_cu_index", DebugSecType, 0);
+ DwarfTUIndexSection =
+ Ctx->getELFSection(".debug_tu_index", DebugSecType, 0);
+
+ StackMapSection =
+ Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
+
+ FaultMapSection =
+ Ctx->getELFSection(".llvm_faultmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
+
+ EHFrameSection =
+ Ctx->getELFSection(".eh_frame", EHSectionType, EHSectionFlags);
+
+ StackSizesSection = Ctx->getELFSection(".stack_sizes", ELF::SHT_PROGBITS, 0);
+}
+
+void MCObjectFileInfo::initCOFFMCObjectFileInfo(const Triple &T) {
+ EHFrameSection = Ctx->getCOFFSection(
+ ".eh_frame", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getData());
+
+ // Set the `IMAGE_SCN_MEM_16BIT` flag when compiling for thumb mode. This is
+ // used to indicate to the linker that the text segment contains thumb instructions
+ // and to set the ISA selection bit for calls accordingly.
+ const bool IsThumb = T.getArch() == Triple::thumb;
+
+ CommDirectiveSupportsAlignment = true;
+
+ // COFF
+ BSSSection = Ctx->getCOFFSection(
+ ".bss", COFF::IMAGE_SCN_CNT_UNINITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getBSS());
+ TextSection = Ctx->getCOFFSection(
+ ".text",
+ (IsThumb ? COFF::IMAGE_SCN_MEM_16BIT : (COFF::SectionCharacteristics)0) |
+ COFF::IMAGE_SCN_CNT_CODE | COFF::IMAGE_SCN_MEM_EXECUTE |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getText());
+ DataSection = Ctx->getCOFFSection(
+ ".data", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getData());
+ ReadOnlySection = Ctx->getCOFFSection(
+ ".rdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getReadOnly());
+
+ // FIXME: We're emitting LSDA info into a readonly section on COFF, even
+ // though it contains relocatable pointers. In PIC mode, this is probably a
+ // big runtime hit for C++ apps. Either the contents of the LSDA need to be
+ // adjusted or this should be a data section.
+ if (T.getArch() == Triple::x86_64) {
+ // On Windows 64 with SEH, the LSDA is emitted into the .xdata section
+ LSDASection = nullptr;
+ } else {
+ LSDASection = Ctx->getCOFFSection(".gcc_except_table",
+ COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getReadOnly());
+ }
+
+ // Debug info.
+ COFFDebugSymbolsSection =
+ Ctx->getCOFFSection(".debug$S", (COFF::IMAGE_SCN_MEM_DISCARDABLE |
+ COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ),
+ SectionKind::getMetadata());
+ COFFDebugTypesSection =
+ Ctx->getCOFFSection(".debug$T", (COFF::IMAGE_SCN_MEM_DISCARDABLE |
+ COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ),
+ SectionKind::getMetadata());
+
+ DwarfAbbrevSection = Ctx->getCOFFSection(
+ ".debug_abbrev",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "section_abbrev");
+ DwarfInfoSection = Ctx->getCOFFSection(
+ ".debug_info",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "section_info");
+ DwarfLineSection = Ctx->getCOFFSection(
+ ".debug_line",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "section_line");
+
+ DwarfFrameSection = Ctx->getCOFFSection(
+ ".debug_frame",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata());
+ DwarfPubNamesSection = Ctx->getCOFFSection(
+ ".debug_pubnames",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata());
+ DwarfPubTypesSection = Ctx->getCOFFSection(
+ ".debug_pubtypes",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata());
+ DwarfGnuPubNamesSection = Ctx->getCOFFSection(
+ ".debug_gnu_pubnames",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata());
+ DwarfGnuPubTypesSection = Ctx->getCOFFSection(
+ ".debug_gnu_pubtypes",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata());
+ DwarfStrSection = Ctx->getCOFFSection(
+ ".debug_str",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "info_string");
+ DwarfStrOffSection = Ctx->getCOFFSection(
+ ".debug_str_offsets",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "section_str_off");
+ DwarfLocSection = Ctx->getCOFFSection(
+ ".debug_loc",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "section_debug_loc");
+ DwarfARangesSection = Ctx->getCOFFSection(
+ ".debug_aranges",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata());
+ DwarfRangesSection = Ctx->getCOFFSection(
+ ".debug_ranges",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "debug_range");
+ DwarfMacinfoSection = Ctx->getCOFFSection(
+ ".debug_macinfo",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "debug_macinfo");
+ DwarfInfoDWOSection = Ctx->getCOFFSection(
+ ".debug_info.dwo",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "section_info_dwo");
+ DwarfTypesDWOSection = Ctx->getCOFFSection(
+ ".debug_types.dwo",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "section_types_dwo");
+ DwarfAbbrevDWOSection = Ctx->getCOFFSection(
+ ".debug_abbrev.dwo",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "section_abbrev_dwo");
+ DwarfStrDWOSection = Ctx->getCOFFSection(
+ ".debug_str.dwo",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "skel_string");
+ DwarfLineDWOSection = Ctx->getCOFFSection(
+ ".debug_line.dwo",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata());
+ DwarfLocDWOSection = Ctx->getCOFFSection(
+ ".debug_loc.dwo",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "skel_loc");
+ DwarfStrOffDWOSection = Ctx->getCOFFSection(
+ ".debug_str_offsets.dwo",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "section_str_off_dwo");
+ DwarfAddrSection = Ctx->getCOFFSection(
+ ".debug_addr",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "addr_sec");
+ DwarfCUIndexSection = Ctx->getCOFFSection(
+ ".debug_cu_index",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata());
+ DwarfTUIndexSection = Ctx->getCOFFSection(
+ ".debug_tu_index",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata());
+ DwarfAccelNamesSection = Ctx->getCOFFSection(
+ ".apple_names",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "names_begin");
+ DwarfAccelNamespaceSection = Ctx->getCOFFSection(
+ ".apple_namespaces",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "namespac_begin");
+ DwarfAccelTypesSection = Ctx->getCOFFSection(
+ ".apple_types",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "types_begin");
+ DwarfAccelObjCSection = Ctx->getCOFFSection(
+ ".apple_objc",
+ COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getMetadata(), "objc_begin");
+
+ DrectveSection = Ctx->getCOFFSection(
+ ".drectve", COFF::IMAGE_SCN_LNK_INFO | COFF::IMAGE_SCN_LNK_REMOVE,
+ SectionKind::getMetadata());
+
+ PDataSection = Ctx->getCOFFSection(
+ ".pdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getData());
+
+ XDataSection = Ctx->getCOFFSection(
+ ".xdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getData());
+
+ SXDataSection = Ctx->getCOFFSection(".sxdata", COFF::IMAGE_SCN_LNK_INFO,
+ SectionKind::getMetadata());
+
+ TLSDataSection = Ctx->getCOFFSection(
+ ".tls$", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getData());
+
+ StackMapSection = Ctx->getCOFFSection(".llvm_stackmaps",
+ COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ,
+ SectionKind::getReadOnly());
+}
+
+void MCObjectFileInfo::initWasmMCObjectFileInfo(const Triple &T) {
+ // TODO: Set the section types and flags.
+ TextSection = Ctx->getWasmSection(".text", SectionKind::getText());
+ DataSection = Ctx->getWasmSection(".data", SectionKind::getData());
+
+ // TODO: Set the section types and flags.
+ DwarfLineSection = Ctx->getWasmSection(".debug_line", SectionKind::getMetadata());
+ DwarfStrSection = Ctx->getWasmSection(".debug_str", SectionKind::getMetadata());
+ DwarfLocSection = Ctx->getWasmSection(".debug_loc", SectionKind::getMetadata());
+ DwarfAbbrevSection = Ctx->getWasmSection(".debug_abbrev", SectionKind::getMetadata(), "section_abbrev");
+ DwarfARangesSection = Ctx->getWasmSection(".debug_aranges", SectionKind::getMetadata());
+ DwarfRangesSection = Ctx->getWasmSection(".debug_ranges", SectionKind::getMetadata(), "debug_range");
+ DwarfMacinfoSection = Ctx->getWasmSection(".debug_macinfo", SectionKind::getMetadata(), "debug_macinfo");
+ DwarfAddrSection = Ctx->getWasmSection(".debug_addr", SectionKind::getMetadata());
+ DwarfCUIndexSection = Ctx->getWasmSection(".debug_cu_index", SectionKind::getMetadata());
+ DwarfTUIndexSection = Ctx->getWasmSection(".debug_tu_index", SectionKind::getMetadata());
+ DwarfInfoSection = Ctx->getWasmSection(".debug_info", SectionKind::getMetadata(), "section_info");
+ DwarfFrameSection = Ctx->getWasmSection(".debug_frame", SectionKind::getMetadata());
+ DwarfPubNamesSection = Ctx->getWasmSection(".debug_pubnames", SectionKind::getMetadata());
+ DwarfPubTypesSection = Ctx->getWasmSection(".debug_pubtypes", SectionKind::getMetadata());
+
+ // TODO: Define more sections.
+}
+
+void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, bool PIC,
+ MCContext &ctx,
+ bool LargeCodeModel) {
+ PositionIndependent = PIC;
+ Ctx = &ctx;
+
+ // Common.
+ CommDirectiveSupportsAlignment = true;
+ SupportsWeakOmittedEHFrame = true;
+ SupportsCompactUnwindWithoutEHFrame = false;
+ OmitDwarfIfHaveCompactUnwind = false;
+
+ PersonalityEncoding = LSDAEncoding = FDECFIEncoding = TTypeEncoding =
+ dwarf::DW_EH_PE_absptr;
+
+ CompactUnwindDwarfEHFrameOnly = 0;
+
+ EHFrameSection = nullptr; // Created on demand.
+ CompactUnwindSection = nullptr; // Used only by selected targets.
+ DwarfAccelNamesSection = nullptr; // Used only by selected targets.
+ DwarfAccelObjCSection = nullptr; // Used only by selected targets.
+ DwarfAccelNamespaceSection = nullptr; // Used only by selected targets.
+ DwarfAccelTypesSection = nullptr; // Used only by selected targets.
+
+ TT = TheTriple;
+
+ switch (TT.getObjectFormat()) {
+ case Triple::MachO:
+ Env = IsMachO;
+ initMachOMCObjectFileInfo(TT);
+ break;
+ case Triple::COFF:
+ if (!TT.isOSWindows())
+ report_fatal_error(
+ "Cannot initialize MC for non-Windows COFF object files.");
+
+ Env = IsCOFF;
+ initCOFFMCObjectFileInfo(TT);
+ break;
+ case Triple::ELF:
+ Env = IsELF;
+ initELFMCObjectFileInfo(TT, LargeCodeModel);
+ break;
+ case Triple::Wasm:
+ Env = IsWasm;
+ initWasmMCObjectFileInfo(TT);
+ break;
+ case Triple::UnknownObjectFormat:
+ report_fatal_error("Cannot initialize MC for unknown object file format.");
+ break;
+ }
+}
+
+MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const {
+ return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP,
+ 0, utostr(Hash));
+}
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