1182 lines
50 KiB
C++
1182 lines
50 KiB
C++
//===-- MCObjectFileInfo.cpp - Object File Information --------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/ADT/StringExtras.h"
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#include "llvm/ADT/Triple.h"
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#include "llvm/BinaryFormat/COFF.h"
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#include "llvm/BinaryFormat/ELF.h"
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#include "llvm/BinaryFormat/Wasm.h"
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#include "llvm/MC/MCAsmInfo.h"
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#include "llvm/MC/MCContext.h"
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#include "llvm/MC/MCSection.h"
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#include "llvm/MC/MCSectionCOFF.h"
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#include "llvm/MC/MCSectionDXContainer.h"
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#include "llvm/MC/MCSectionELF.h"
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#include "llvm/MC/MCSectionGOFF.h"
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#include "llvm/MC/MCSectionMachO.h"
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#include "llvm/MC/MCSectionSPIRV.h"
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#include "llvm/MC/MCSectionWasm.h"
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#include "llvm/MC/MCSectionXCOFF.h"
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#include "llvm/Support/Casting.h"
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using namespace llvm;
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static bool useCompactUnwind(const Triple &T) {
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// Only on darwin.
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if (!T.isOSDarwin())
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return false;
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// aarch64 always has it.
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if (T.getArch() == Triple::aarch64 || T.getArch() == Triple::aarch64_32)
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return true;
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// armv7k always has it.
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if (T.isWatchABI())
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return true;
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// Use it on newer version of OS X.
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if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
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return true;
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// And the iOS simulator.
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if (T.isiOS() && T.isX86())
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return true;
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return false;
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}
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void MCObjectFileInfo::initMachOMCObjectFileInfo(const Triple &T) {
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// MachO
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SupportsWeakOmittedEHFrame = false;
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EHFrameSection = Ctx->getMachOSection(
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"__TEXT", "__eh_frame",
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MachO::S_COALESCED | MachO::S_ATTR_NO_TOC |
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MachO::S_ATTR_STRIP_STATIC_SYMS | MachO::S_ATTR_LIVE_SUPPORT,
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SectionKind::getReadOnly());
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if (T.isOSDarwin() &&
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(T.getArch() == Triple::aarch64 || T.getArch() == Triple::aarch64_32))
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SupportsCompactUnwindWithoutEHFrame = true;
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switch (Ctx->emitDwarfUnwindInfo()) {
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case EmitDwarfUnwindType::Always:
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OmitDwarfIfHaveCompactUnwind = false;
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break;
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case EmitDwarfUnwindType::NoCompactUnwind:
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OmitDwarfIfHaveCompactUnwind = true;
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break;
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case EmitDwarfUnwindType::Default:
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OmitDwarfIfHaveCompactUnwind =
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T.isWatchABI() || SupportsCompactUnwindWithoutEHFrame;
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break;
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}
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FDECFIEncoding = dwarf::DW_EH_PE_pcrel;
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// .comm doesn't support alignment before Leopard.
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if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5))
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CommDirectiveSupportsAlignment = false;
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TextSection // .text
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= Ctx->getMachOSection("__TEXT", "__text",
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MachO::S_ATTR_PURE_INSTRUCTIONS,
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SectionKind::getText());
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DataSection // .data
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= Ctx->getMachOSection("__DATA", "__data", 0, SectionKind::getData());
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// BSSSection might not be expected initialized on msvc.
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BSSSection = nullptr;
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TLSDataSection // .tdata
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= Ctx->getMachOSection("__DATA", "__thread_data",
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MachO::S_THREAD_LOCAL_REGULAR,
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SectionKind::getData());
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TLSBSSSection // .tbss
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= Ctx->getMachOSection("__DATA", "__thread_bss",
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MachO::S_THREAD_LOCAL_ZEROFILL,
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SectionKind::getThreadBSS());
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// TODO: Verify datarel below.
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TLSTLVSection // .tlv
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= Ctx->getMachOSection("__DATA", "__thread_vars",
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MachO::S_THREAD_LOCAL_VARIABLES,
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SectionKind::getData());
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TLSThreadInitSection = Ctx->getMachOSection(
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"__DATA", "__thread_init", MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
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SectionKind::getData());
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CStringSection // .cstring
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= Ctx->getMachOSection("__TEXT", "__cstring",
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MachO::S_CSTRING_LITERALS,
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SectionKind::getMergeable1ByteCString());
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UStringSection
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= Ctx->getMachOSection("__TEXT","__ustring", 0,
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SectionKind::getMergeable2ByteCString());
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FourByteConstantSection // .literal4
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= Ctx->getMachOSection("__TEXT", "__literal4",
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MachO::S_4BYTE_LITERALS,
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SectionKind::getMergeableConst4());
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EightByteConstantSection // .literal8
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= Ctx->getMachOSection("__TEXT", "__literal8",
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MachO::S_8BYTE_LITERALS,
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SectionKind::getMergeableConst8());
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SixteenByteConstantSection // .literal16
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= Ctx->getMachOSection("__TEXT", "__literal16",
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MachO::S_16BYTE_LITERALS,
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SectionKind::getMergeableConst16());
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ReadOnlySection // .const
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= Ctx->getMachOSection("__TEXT", "__const", 0,
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SectionKind::getReadOnly());
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// If the target is not powerpc, map the coal sections to the non-coal
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// sections.
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//
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// "__TEXT/__textcoal_nt" => section "__TEXT/__text"
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// "__TEXT/__const_coal" => section "__TEXT/__const"
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// "__DATA/__datacoal_nt" => section "__DATA/__data"
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Triple::ArchType ArchTy = T.getArch();
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ConstDataSection // .const_data
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= Ctx->getMachOSection("__DATA", "__const", 0,
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SectionKind::getReadOnlyWithRel());
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if (ArchTy == Triple::ppc || ArchTy == Triple::ppc64) {
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TextCoalSection
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= Ctx->getMachOSection("__TEXT", "__textcoal_nt",
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MachO::S_COALESCED |
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MachO::S_ATTR_PURE_INSTRUCTIONS,
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SectionKind::getText());
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ConstTextCoalSection
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= Ctx->getMachOSection("__TEXT", "__const_coal",
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MachO::S_COALESCED,
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SectionKind::getReadOnly());
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DataCoalSection = Ctx->getMachOSection(
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"__DATA", "__datacoal_nt", MachO::S_COALESCED, SectionKind::getData());
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ConstDataCoalSection = DataCoalSection;
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} else {
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TextCoalSection = TextSection;
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ConstTextCoalSection = ReadOnlySection;
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DataCoalSection = DataSection;
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ConstDataCoalSection = ConstDataSection;
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}
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DataCommonSection
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= Ctx->getMachOSection("__DATA","__common",
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MachO::S_ZEROFILL,
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SectionKind::getBSS());
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DataBSSSection
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= Ctx->getMachOSection("__DATA","__bss", MachO::S_ZEROFILL,
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SectionKind::getBSS());
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LazySymbolPointerSection
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= Ctx->getMachOSection("__DATA", "__la_symbol_ptr",
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MachO::S_LAZY_SYMBOL_POINTERS,
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SectionKind::getMetadata());
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NonLazySymbolPointerSection
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= Ctx->getMachOSection("__DATA", "__nl_symbol_ptr",
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MachO::S_NON_LAZY_SYMBOL_POINTERS,
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SectionKind::getMetadata());
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ThreadLocalPointerSection
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= Ctx->getMachOSection("__DATA", "__thread_ptr",
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MachO::S_THREAD_LOCAL_VARIABLE_POINTERS,
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SectionKind::getMetadata());
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AddrSigSection = Ctx->getMachOSection("__DATA", "__llvm_addrsig", 0,
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SectionKind::getData());
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// Exception Handling.
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LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0,
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SectionKind::getReadOnlyWithRel());
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COFFDebugSymbolsSection = nullptr;
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COFFDebugTypesSection = nullptr;
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COFFGlobalTypeHashesSection = nullptr;
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if (useCompactUnwind(T)) {
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CompactUnwindSection =
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Ctx->getMachOSection("__LD", "__compact_unwind", MachO::S_ATTR_DEBUG,
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SectionKind::getReadOnly());
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if (T.isX86())
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CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_X86_64_MODE_DWARF
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else if (T.getArch() == Triple::aarch64 || T.getArch() == Triple::aarch64_32)
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CompactUnwindDwarfEHFrameOnly = 0x03000000; // UNWIND_ARM64_MODE_DWARF
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else if (T.getArch() == Triple::arm || T.getArch() == Triple::thumb)
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CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_ARM_MODE_DWARF
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}
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// Debug Information.
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DwarfDebugNamesSection =
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Ctx->getMachOSection("__DWARF", "__debug_names", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "debug_names_begin");
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DwarfAccelNamesSection =
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Ctx->getMachOSection("__DWARF", "__apple_names", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "names_begin");
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DwarfAccelObjCSection =
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Ctx->getMachOSection("__DWARF", "__apple_objc", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "objc_begin");
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// 16 character section limit...
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DwarfAccelNamespaceSection =
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Ctx->getMachOSection("__DWARF", "__apple_namespac", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "namespac_begin");
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DwarfAccelTypesSection =
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Ctx->getMachOSection("__DWARF", "__apple_types", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "types_begin");
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DwarfSwiftASTSection =
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Ctx->getMachOSection("__DWARF", "__swift_ast", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfAbbrevSection =
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Ctx->getMachOSection("__DWARF", "__debug_abbrev", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "section_abbrev");
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DwarfInfoSection =
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Ctx->getMachOSection("__DWARF", "__debug_info", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "section_info");
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DwarfLineSection =
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Ctx->getMachOSection("__DWARF", "__debug_line", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "section_line");
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DwarfLineStrSection =
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Ctx->getMachOSection("__DWARF", "__debug_line_str", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "section_line_str");
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DwarfFrameSection =
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Ctx->getMachOSection("__DWARF", "__debug_frame", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfPubNamesSection =
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Ctx->getMachOSection("__DWARF", "__debug_pubnames", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfPubTypesSection =
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Ctx->getMachOSection("__DWARF", "__debug_pubtypes", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfGnuPubNamesSection =
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Ctx->getMachOSection("__DWARF", "__debug_gnu_pubn", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfGnuPubTypesSection =
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Ctx->getMachOSection("__DWARF", "__debug_gnu_pubt", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfStrSection =
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Ctx->getMachOSection("__DWARF", "__debug_str", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "info_string");
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DwarfStrOffSection =
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Ctx->getMachOSection("__DWARF", "__debug_str_offs", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "section_str_off");
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DwarfAddrSection =
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Ctx->getMachOSection("__DWARF", "__debug_addr", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "section_info");
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DwarfLocSection =
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Ctx->getMachOSection("__DWARF", "__debug_loc", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "section_debug_loc");
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DwarfLoclistsSection =
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Ctx->getMachOSection("__DWARF", "__debug_loclists", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "section_debug_loc");
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DwarfARangesSection =
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Ctx->getMachOSection("__DWARF", "__debug_aranges", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfRangesSection =
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Ctx->getMachOSection("__DWARF", "__debug_ranges", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "debug_range");
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DwarfRnglistsSection =
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Ctx->getMachOSection("__DWARF", "__debug_rnglists", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "debug_range");
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DwarfMacinfoSection =
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Ctx->getMachOSection("__DWARF", "__debug_macinfo", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "debug_macinfo");
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DwarfMacroSection =
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Ctx->getMachOSection("__DWARF", "__debug_macro", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata(), "debug_macro");
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DwarfDebugInlineSection =
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Ctx->getMachOSection("__DWARF", "__debug_inlined", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfCUIndexSection =
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Ctx->getMachOSection("__DWARF", "__debug_cu_index", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfTUIndexSection =
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Ctx->getMachOSection("__DWARF", "__debug_tu_index", MachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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StackMapSection = Ctx->getMachOSection("__LLVM_STACKMAPS", "__llvm_stackmaps",
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0, SectionKind::getMetadata());
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FaultMapSection = Ctx->getMachOSection("__LLVM_FAULTMAPS", "__llvm_faultmaps",
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0, SectionKind::getMetadata());
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RemarksSection = Ctx->getMachOSection(
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"__LLVM", "__remarks", MachO::S_ATTR_DEBUG, SectionKind::getMetadata());
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// The architecture of dsymutil makes it very difficult to copy the Swift
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// reflection metadata sections into the __TEXT segment, so dsymutil creates
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// these sections in the __DWARF segment instead.
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if (!Ctx->getSwift5ReflectionSegmentName().empty()) {
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#define HANDLE_SWIFT_SECTION(KIND, MACHO, ELF, COFF) \
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Swift5ReflectionSections \
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[llvm::binaryformat::Swift5ReflectionSectionKind::KIND] = \
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Ctx->getMachOSection(Ctx->getSwift5ReflectionSegmentName().data(), \
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MACHO, 0, SectionKind::getMetadata());
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#include "llvm/BinaryFormat/Swift.def"
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}
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TLSExtraDataSection = TLSTLVSection;
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}
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void MCObjectFileInfo::initELFMCObjectFileInfo(const Triple &T, bool Large) {
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switch (T.getArch()) {
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case Triple::mips:
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case Triple::mipsel:
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case Triple::mips64:
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case Triple::mips64el:
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// We cannot use DW_EH_PE_sdata8 for the large PositionIndependent case
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// since there is no R_MIPS_PC64 relocation (only a 32-bit version).
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if (PositionIndependent && !Large)
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FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
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else
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FDECFIEncoding = Ctx->getAsmInfo()->getCodePointerSize() == 4
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? dwarf::DW_EH_PE_sdata4
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: dwarf::DW_EH_PE_sdata8;
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break;
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case Triple::ppc64:
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case Triple::ppc64le:
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case Triple::aarch64:
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case Triple::aarch64_be:
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case Triple::x86_64:
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FDECFIEncoding = dwarf::DW_EH_PE_pcrel |
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(Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4);
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break;
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case Triple::bpfel:
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case Triple::bpfeb:
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FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
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break;
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case Triple::hexagon:
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FDECFIEncoding =
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PositionIndependent ? dwarf::DW_EH_PE_pcrel : dwarf::DW_EH_PE_absptr;
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break;
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default:
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FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
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break;
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}
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unsigned EHSectionType = T.getArch() == Triple::x86_64
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? ELF::SHT_X86_64_UNWIND
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: ELF::SHT_PROGBITS;
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// Solaris requires different flags for .eh_frame to seemingly every other
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// platform.
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unsigned EHSectionFlags = ELF::SHF_ALLOC;
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if (T.isOSSolaris() && T.getArch() != Triple::x86_64)
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EHSectionFlags |= ELF::SHF_WRITE;
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// ELF
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BSSSection = Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
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ELF::SHF_WRITE | ELF::SHF_ALLOC);
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TextSection = Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
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ELF::SHF_EXECINSTR | ELF::SHF_ALLOC);
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DataSection = Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
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ELF::SHF_WRITE | ELF::SHF_ALLOC);
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ReadOnlySection =
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Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS, ELF::SHF_ALLOC);
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TLSDataSection =
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Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
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TLSBSSSection = Ctx->getELFSection(
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".tbss", ELF::SHT_NOBITS, ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE);
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DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC | ELF::SHF_WRITE);
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MergeableConst4Section =
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Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC | ELF::SHF_MERGE, 4);
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MergeableConst8Section =
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Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC | ELF::SHF_MERGE, 8);
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MergeableConst16Section =
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Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC | ELF::SHF_MERGE, 16);
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MergeableConst32Section =
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Ctx->getELFSection(".rodata.cst32", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC | ELF::SHF_MERGE, 32);
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// Exception Handling Sections.
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// FIXME: We're emitting LSDA info into a readonly section on ELF, even though
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// it contains relocatable pointers. In PIC mode, this is probably a big
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// runtime hit for C++ apps. Either the contents of the LSDA need to be
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// 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.isMIPS())
|
|
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);
|
|
DwarfLineStrSection =
|
|
Ctx->getELFSection(".debug_line_str", DebugSecType,
|
|
ELF::SHF_MERGE | ELF::SHF_STRINGS, 1);
|
|
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);
|
|
DwarfMacroSection = Ctx->getELFSection(".debug_macro", DebugSecType, 0);
|
|
|
|
// DWARF5 Experimental Debug Info
|
|
|
|
// Accelerator Tables
|
|
DwarfDebugNamesSection =
|
|
Ctx->getELFSection(".debug_names", ELF::SHT_PROGBITS, 0);
|
|
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);
|
|
DwarfRnglistsSection = Ctx->getELFSection(".debug_rnglists", DebugSecType, 0);
|
|
DwarfLoclistsSection = Ctx->getELFSection(".debug_loclists", DebugSecType, 0);
|
|
|
|
// Fission Sections
|
|
DwarfInfoDWOSection =
|
|
Ctx->getELFSection(".debug_info.dwo", DebugSecType, ELF::SHF_EXCLUDE);
|
|
DwarfTypesDWOSection =
|
|
Ctx->getELFSection(".debug_types.dwo", DebugSecType, ELF::SHF_EXCLUDE);
|
|
DwarfAbbrevDWOSection =
|
|
Ctx->getELFSection(".debug_abbrev.dwo", DebugSecType, ELF::SHF_EXCLUDE);
|
|
DwarfStrDWOSection = Ctx->getELFSection(
|
|
".debug_str.dwo", DebugSecType,
|
|
ELF::SHF_MERGE | ELF::SHF_STRINGS | ELF::SHF_EXCLUDE, 1);
|
|
DwarfLineDWOSection =
|
|
Ctx->getELFSection(".debug_line.dwo", DebugSecType, ELF::SHF_EXCLUDE);
|
|
DwarfLocDWOSection =
|
|
Ctx->getELFSection(".debug_loc.dwo", DebugSecType, ELF::SHF_EXCLUDE);
|
|
DwarfStrOffDWOSection = Ctx->getELFSection(".debug_str_offsets.dwo",
|
|
DebugSecType, ELF::SHF_EXCLUDE);
|
|
DwarfRnglistsDWOSection =
|
|
Ctx->getELFSection(".debug_rnglists.dwo", DebugSecType, ELF::SHF_EXCLUDE);
|
|
DwarfMacinfoDWOSection =
|
|
Ctx->getELFSection(".debug_macinfo.dwo", DebugSecType, ELF::SHF_EXCLUDE);
|
|
DwarfMacroDWOSection =
|
|
Ctx->getELFSection(".debug_macro.dwo", DebugSecType, ELF::SHF_EXCLUDE);
|
|
|
|
DwarfLoclistsDWOSection =
|
|
Ctx->getELFSection(".debug_loclists.dwo", DebugSecType, ELF::SHF_EXCLUDE);
|
|
|
|
// 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);
|
|
|
|
PseudoProbeSection = Ctx->getELFSection(".pseudo_probe", DebugSecType, 0);
|
|
PseudoProbeDescSection =
|
|
Ctx->getELFSection(".pseudo_probe_desc", DebugSecType, 0);
|
|
}
|
|
|
|
void MCObjectFileInfo::initGOFFMCObjectFileInfo(const Triple &T) {
|
|
TextSection =
|
|
Ctx->getGOFFSection(".text", SectionKind::getText(), nullptr, nullptr);
|
|
BSSSection =
|
|
Ctx->getGOFFSection(".bss", SectionKind::getBSS(), nullptr, nullptr);
|
|
PPA1Section =
|
|
Ctx->getGOFFSection(".ppa1", SectionKind::getMetadata(), TextSection,
|
|
MCConstantExpr::create(GOFF::SK_PPA1, *Ctx));
|
|
}
|
|
|
|
void MCObjectFileInfo::initCOFFMCObjectFileInfo(const Triple &T) {
|
|
EHFrameSection =
|
|
Ctx->getCOFFSection(".eh_frame", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
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());
|
|
|
|
if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::aarch64 ||
|
|
T.getArch() == Triple::arm || T.getArch() == Triple::thumb) {
|
|
// On Windows 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());
|
|
COFFGlobalTypeHashesSection = Ctx->getCOFFSection(
|
|
".debug$H",
|
|
(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");
|
|
DwarfLineStrSection = Ctx->getCOFFSection(
|
|
".debug_line_str",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata(), "section_line_str");
|
|
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");
|
|
DwarfLoclistsSection = Ctx->getCOFFSection(
|
|
".debug_loclists",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata(), "section_debug_loclists");
|
|
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");
|
|
DwarfRnglistsSection = Ctx->getCOFFSection(
|
|
".debug_rnglists",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata(), "debug_rnglists");
|
|
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");
|
|
DwarfMacroSection = Ctx->getCOFFSection(
|
|
".debug_macro",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata(), "debug_macro");
|
|
DwarfMacinfoDWOSection = Ctx->getCOFFSection(
|
|
".debug_macinfo.dwo",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata(), "debug_macinfo.dwo");
|
|
DwarfMacroDWOSection = Ctx->getCOFFSection(
|
|
".debug_macro.dwo",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata(), "debug_macro.dwo");
|
|
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());
|
|
DwarfDebugNamesSection = Ctx->getCOFFSection(
|
|
".debug_names",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata(), "debug_names_begin");
|
|
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());
|
|
|
|
GEHContSection = Ctx->getCOFFSection(".gehcont$y",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
|
|
GFIDsSection = Ctx->getCOFFSection(".gfids$y",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
|
|
GIATsSection = Ctx->getCOFFSection(".giats$y",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
|
|
GLJMPSection = Ctx->getCOFFSection(".gljmp$y",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
|
|
TLSDataSection = Ctx->getCOFFSection(
|
|
".tls$", 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::initSPIRVMCObjectFileInfo(const Triple &T) {
|
|
// Put everything in a single binary section.
|
|
TextSection = Ctx->getSPIRVSection();
|
|
}
|
|
|
|
void MCObjectFileInfo::initWasmMCObjectFileInfo(const Triple &T) {
|
|
TextSection = Ctx->getWasmSection(".text", SectionKind::getText());
|
|
DataSection = Ctx->getWasmSection(".data", SectionKind::getData());
|
|
|
|
DwarfLineSection =
|
|
Ctx->getWasmSection(".debug_line", SectionKind::getMetadata());
|
|
DwarfLineStrSection =
|
|
Ctx->getWasmSection(".debug_line_str", SectionKind::getMetadata(),
|
|
wasm::WASM_SEG_FLAG_STRINGS);
|
|
DwarfStrSection = Ctx->getWasmSection(
|
|
".debug_str", SectionKind::getMetadata(), wasm::WASM_SEG_FLAG_STRINGS);
|
|
DwarfLocSection =
|
|
Ctx->getWasmSection(".debug_loc", SectionKind::getMetadata());
|
|
DwarfAbbrevSection =
|
|
Ctx->getWasmSection(".debug_abbrev", SectionKind::getMetadata());
|
|
DwarfARangesSection = Ctx->getWasmSection(".debug_aranges", SectionKind::getMetadata());
|
|
DwarfRangesSection =
|
|
Ctx->getWasmSection(".debug_ranges", SectionKind::getMetadata());
|
|
DwarfMacinfoSection =
|
|
Ctx->getWasmSection(".debug_macinfo", SectionKind::getMetadata());
|
|
DwarfMacroSection =
|
|
Ctx->getWasmSection(".debug_macro", 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());
|
|
DwarfFrameSection = Ctx->getWasmSection(".debug_frame", SectionKind::getMetadata());
|
|
DwarfPubNamesSection = Ctx->getWasmSection(".debug_pubnames", SectionKind::getMetadata());
|
|
DwarfPubTypesSection = Ctx->getWasmSection(".debug_pubtypes", SectionKind::getMetadata());
|
|
DwarfGnuPubNamesSection =
|
|
Ctx->getWasmSection(".debug_gnu_pubnames", SectionKind::getMetadata());
|
|
DwarfGnuPubTypesSection =
|
|
Ctx->getWasmSection(".debug_gnu_pubtypes", SectionKind::getMetadata());
|
|
|
|
DwarfDebugNamesSection =
|
|
Ctx->getWasmSection(".debug_names", SectionKind::getMetadata());
|
|
DwarfStrOffSection =
|
|
Ctx->getWasmSection(".debug_str_offsets", SectionKind::getMetadata());
|
|
DwarfAddrSection =
|
|
Ctx->getWasmSection(".debug_addr", SectionKind::getMetadata());
|
|
DwarfRnglistsSection =
|
|
Ctx->getWasmSection(".debug_rnglists", SectionKind::getMetadata());
|
|
DwarfLoclistsSection =
|
|
Ctx->getWasmSection(".debug_loclists", SectionKind::getMetadata());
|
|
|
|
// Fission Sections
|
|
DwarfInfoDWOSection =
|
|
Ctx->getWasmSection(".debug_info.dwo", SectionKind::getMetadata());
|
|
DwarfTypesDWOSection =
|
|
Ctx->getWasmSection(".debug_types.dwo", SectionKind::getMetadata());
|
|
DwarfAbbrevDWOSection =
|
|
Ctx->getWasmSection(".debug_abbrev.dwo", SectionKind::getMetadata());
|
|
DwarfStrDWOSection =
|
|
Ctx->getWasmSection(".debug_str.dwo", SectionKind::getMetadata(),
|
|
wasm::WASM_SEG_FLAG_STRINGS);
|
|
DwarfLineDWOSection =
|
|
Ctx->getWasmSection(".debug_line.dwo", SectionKind::getMetadata());
|
|
DwarfLocDWOSection =
|
|
Ctx->getWasmSection(".debug_loc.dwo", SectionKind::getMetadata());
|
|
DwarfStrOffDWOSection =
|
|
Ctx->getWasmSection(".debug_str_offsets.dwo", SectionKind::getMetadata());
|
|
DwarfRnglistsDWOSection =
|
|
Ctx->getWasmSection(".debug_rnglists.dwo", SectionKind::getMetadata());
|
|
DwarfMacinfoDWOSection =
|
|
Ctx->getWasmSection(".debug_macinfo.dwo", SectionKind::getMetadata());
|
|
DwarfMacroDWOSection =
|
|
Ctx->getWasmSection(".debug_macro.dwo", SectionKind::getMetadata());
|
|
|
|
DwarfLoclistsDWOSection =
|
|
Ctx->getWasmSection(".debug_loclists.dwo", SectionKind::getMetadata());
|
|
|
|
// DWP Sections
|
|
DwarfCUIndexSection =
|
|
Ctx->getWasmSection(".debug_cu_index", SectionKind::getMetadata());
|
|
DwarfTUIndexSection =
|
|
Ctx->getWasmSection(".debug_tu_index", SectionKind::getMetadata());
|
|
|
|
// Wasm use data section for LSDA.
|
|
// TODO Consider putting each function's exception table in a separate
|
|
// section, as in -function-sections, to facilitate lld's --gc-section.
|
|
LSDASection = Ctx->getWasmSection(".rodata.gcc_except_table",
|
|
SectionKind::getReadOnlyWithRel());
|
|
|
|
// TODO: Define more sections.
|
|
}
|
|
|
|
void MCObjectFileInfo::initXCOFFMCObjectFileInfo(const Triple &T) {
|
|
// The default csect for program code. Functions without a specified section
|
|
// get placed into this csect. The choice of csect name is not a property of
|
|
// the ABI or object file format. For example, the XL compiler uses an unnamed
|
|
// csect for program code.
|
|
TextSection = Ctx->getXCOFFSection(
|
|
".text", SectionKind::getText(),
|
|
XCOFF::CsectProperties(XCOFF::StorageMappingClass::XMC_PR, XCOFF::XTY_SD),
|
|
/* MultiSymbolsAllowed*/ true);
|
|
|
|
DataSection = Ctx->getXCOFFSection(
|
|
".data", SectionKind::getData(),
|
|
XCOFF::CsectProperties(XCOFF::StorageMappingClass::XMC_RW, XCOFF::XTY_SD),
|
|
/* MultiSymbolsAllowed*/ true);
|
|
|
|
ReadOnlySection = Ctx->getXCOFFSection(
|
|
".rodata", SectionKind::getReadOnly(),
|
|
XCOFF::CsectProperties(XCOFF::StorageMappingClass::XMC_RO, XCOFF::XTY_SD),
|
|
/* MultiSymbolsAllowed*/ true);
|
|
ReadOnlySection->setAlignment(Align(4));
|
|
|
|
ReadOnly8Section = Ctx->getXCOFFSection(
|
|
".rodata.8", SectionKind::getReadOnly(),
|
|
XCOFF::CsectProperties(XCOFF::StorageMappingClass::XMC_RO, XCOFF::XTY_SD),
|
|
/* MultiSymbolsAllowed*/ true);
|
|
ReadOnly8Section->setAlignment(Align(8));
|
|
|
|
ReadOnly16Section = Ctx->getXCOFFSection(
|
|
".rodata.16", SectionKind::getReadOnly(),
|
|
XCOFF::CsectProperties(XCOFF::StorageMappingClass::XMC_RO, XCOFF::XTY_SD),
|
|
/* MultiSymbolsAllowed*/ true);
|
|
ReadOnly16Section->setAlignment(Align(16));
|
|
|
|
TLSDataSection = Ctx->getXCOFFSection(
|
|
".tdata", SectionKind::getThreadData(),
|
|
XCOFF::CsectProperties(XCOFF::StorageMappingClass::XMC_TL, XCOFF::XTY_SD),
|
|
/* MultiSymbolsAllowed*/ true);
|
|
|
|
TOCBaseSection = Ctx->getXCOFFSection(
|
|
"TOC", SectionKind::getData(),
|
|
XCOFF::CsectProperties(XCOFF::StorageMappingClass::XMC_TC0,
|
|
XCOFF::XTY_SD));
|
|
|
|
// The TOC-base always has 0 size, but 4 byte alignment.
|
|
TOCBaseSection->setAlignment(Align(4));
|
|
|
|
LSDASection = Ctx->getXCOFFSection(
|
|
".gcc_except_table", SectionKind::getReadOnly(),
|
|
XCOFF::CsectProperties(XCOFF::StorageMappingClass::XMC_RO,
|
|
XCOFF::XTY_SD));
|
|
|
|
CompactUnwindSection = Ctx->getXCOFFSection(
|
|
".eh_info_table", SectionKind::getData(),
|
|
XCOFF::CsectProperties(XCOFF::StorageMappingClass::XMC_RW,
|
|
XCOFF::XTY_SD));
|
|
|
|
// DWARF sections for XCOFF are not csects. They are special STYP_DWARF
|
|
// sections, and the individual DWARF sections are distinguished by their
|
|
// section subtype.
|
|
DwarfAbbrevSection = Ctx->getXCOFFSection(
|
|
".dwabrev", SectionKind::getMetadata(), /* CsectProperties */ None,
|
|
/* MultiSymbolsAllowed */ true, ".dwabrev", XCOFF::SSUBTYP_DWABREV);
|
|
|
|
DwarfInfoSection = Ctx->getXCOFFSection(
|
|
".dwinfo", SectionKind::getMetadata(), /* CsectProperties */ None,
|
|
/* MultiSymbolsAllowed */ true, ".dwinfo", XCOFF::SSUBTYP_DWINFO);
|
|
|
|
DwarfLineSection = Ctx->getXCOFFSection(
|
|
".dwline", SectionKind::getMetadata(), /* CsectProperties */ None,
|
|
/* MultiSymbolsAllowed */ true, ".dwline", XCOFF::SSUBTYP_DWLINE);
|
|
|
|
DwarfFrameSection = Ctx->getXCOFFSection(
|
|
".dwframe", SectionKind::getMetadata(), /* CsectProperties */ None,
|
|
/* MultiSymbolsAllowed */ true, ".dwframe", XCOFF::SSUBTYP_DWFRAME);
|
|
|
|
DwarfPubNamesSection = Ctx->getXCOFFSection(
|
|
".dwpbnms", SectionKind::getMetadata(), /* CsectProperties */ None,
|
|
/* MultiSymbolsAllowed */ true, ".dwpbnms", XCOFF::SSUBTYP_DWPBNMS);
|
|
|
|
DwarfPubTypesSection = Ctx->getXCOFFSection(
|
|
".dwpbtyp", SectionKind::getMetadata(), /* CsectProperties */ None,
|
|
/* MultiSymbolsAllowed */ true, ".dwpbtyp", XCOFF::SSUBTYP_DWPBTYP);
|
|
|
|
DwarfStrSection = Ctx->getXCOFFSection(
|
|
".dwstr", SectionKind::getMetadata(), /* CsectProperties */ None,
|
|
/* MultiSymbolsAllowed */ true, ".dwstr", XCOFF::SSUBTYP_DWSTR);
|
|
|
|
DwarfLocSection = Ctx->getXCOFFSection(
|
|
".dwloc", SectionKind::getMetadata(), /* CsectProperties */ None,
|
|
/* MultiSymbolsAllowed */ true, ".dwloc", XCOFF::SSUBTYP_DWLOC);
|
|
|
|
DwarfARangesSection = Ctx->getXCOFFSection(
|
|
".dwarnge", SectionKind::getMetadata(), /* CsectProperties */ None,
|
|
/* MultiSymbolsAllowed */ true, ".dwarnge", XCOFF::SSUBTYP_DWARNGE);
|
|
|
|
DwarfRangesSection = Ctx->getXCOFFSection(
|
|
".dwrnges", SectionKind::getMetadata(), /* CsectProperties */ None,
|
|
/* MultiSymbolsAllowed */ true, ".dwrnges", XCOFF::SSUBTYP_DWRNGES);
|
|
|
|
DwarfMacinfoSection = Ctx->getXCOFFSection(
|
|
".dwmac", SectionKind::getMetadata(), /* CsectProperties */ None,
|
|
/* MultiSymbolsAllowed */ true, ".dwmac", XCOFF::SSUBTYP_DWMAC);
|
|
}
|
|
|
|
void MCObjectFileInfo::initDXContainerObjectFileInfo(const Triple &T) {
|
|
// At the moment the DXBC section should end up empty.
|
|
TextSection = Ctx->getDXContainerSection("DXBC", SectionKind::getText());
|
|
}
|
|
|
|
MCObjectFileInfo::~MCObjectFileInfo() = default;
|
|
|
|
void MCObjectFileInfo::initMCObjectFileInfo(MCContext &MCCtx, bool PIC,
|
|
bool LargeCodeModel) {
|
|
PositionIndependent = PIC;
|
|
Ctx = &MCCtx;
|
|
|
|
// Common.
|
|
CommDirectiveSupportsAlignment = true;
|
|
SupportsWeakOmittedEHFrame = true;
|
|
SupportsCompactUnwindWithoutEHFrame = false;
|
|
OmitDwarfIfHaveCompactUnwind = false;
|
|
|
|
FDECFIEncoding = 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.
|
|
|
|
Triple TheTriple = Ctx->getTargetTriple();
|
|
switch (Ctx->getObjectFileType()) {
|
|
case MCContext::IsMachO:
|
|
initMachOMCObjectFileInfo(TheTriple);
|
|
break;
|
|
case MCContext::IsCOFF:
|
|
initCOFFMCObjectFileInfo(TheTriple);
|
|
break;
|
|
case MCContext::IsELF:
|
|
initELFMCObjectFileInfo(TheTriple, LargeCodeModel);
|
|
break;
|
|
case MCContext::IsGOFF:
|
|
initGOFFMCObjectFileInfo(TheTriple);
|
|
break;
|
|
case MCContext::IsSPIRV:
|
|
initSPIRVMCObjectFileInfo(TheTriple);
|
|
break;
|
|
case MCContext::IsWasm:
|
|
initWasmMCObjectFileInfo(TheTriple);
|
|
break;
|
|
case MCContext::IsXCOFF:
|
|
initXCOFFMCObjectFileInfo(TheTriple);
|
|
break;
|
|
case MCContext::IsDXContainer:
|
|
initDXContainerObjectFileInfo(TheTriple);
|
|
break;
|
|
}
|
|
}
|
|
|
|
MCSection *MCObjectFileInfo::getDwarfComdatSection(const char *Name,
|
|
uint64_t Hash) const {
|
|
switch (Ctx->getTargetTriple().getObjectFormat()) {
|
|
case Triple::ELF:
|
|
return Ctx->getELFSection(Name, ELF::SHT_PROGBITS, ELF::SHF_GROUP, 0,
|
|
utostr(Hash), /*IsComdat=*/true);
|
|
case Triple::Wasm:
|
|
return Ctx->getWasmSection(Name, SectionKind::getMetadata(), 0,
|
|
utostr(Hash), MCContext::GenericSectionID);
|
|
case Triple::MachO:
|
|
case Triple::COFF:
|
|
case Triple::GOFF:
|
|
case Triple::SPIRV:
|
|
case Triple::XCOFF:
|
|
case Triple::DXContainer:
|
|
case Triple::UnknownObjectFormat:
|
|
report_fatal_error("Cannot get DWARF comdat section for this object file "
|
|
"format: not implemented.");
|
|
break;
|
|
}
|
|
llvm_unreachable("Unknown ObjectFormatType");
|
|
}
|
|
|
|
MCSection *
|
|
MCObjectFileInfo::getStackSizesSection(const MCSection &TextSec) const {
|
|
if ((Ctx->getObjectFileType() != MCContext::IsELF) ||
|
|
Ctx->getTargetTriple().isPS4())
|
|
return StackSizesSection;
|
|
|
|
const MCSectionELF &ElfSec = static_cast<const MCSectionELF &>(TextSec);
|
|
unsigned Flags = ELF::SHF_LINK_ORDER;
|
|
StringRef GroupName;
|
|
if (const MCSymbol *Group = ElfSec.getGroup()) {
|
|
GroupName = Group->getName();
|
|
Flags |= ELF::SHF_GROUP;
|
|
}
|
|
|
|
return Ctx->getELFSection(".stack_sizes", ELF::SHT_PROGBITS, Flags, 0,
|
|
GroupName, true, ElfSec.getUniqueID(),
|
|
cast<MCSymbolELF>(TextSec.getBeginSymbol()));
|
|
}
|
|
|
|
MCSection *
|
|
MCObjectFileInfo::getBBAddrMapSection(const MCSection &TextSec) const {
|
|
if (Ctx->getObjectFileType() != MCContext::IsELF)
|
|
return nullptr;
|
|
|
|
const MCSectionELF &ElfSec = static_cast<const MCSectionELF &>(TextSec);
|
|
unsigned Flags = ELF::SHF_LINK_ORDER;
|
|
StringRef GroupName;
|
|
if (const MCSymbol *Group = ElfSec.getGroup()) {
|
|
GroupName = Group->getName();
|
|
Flags |= ELF::SHF_GROUP;
|
|
}
|
|
|
|
// Use the text section's begin symbol and unique ID to create a separate
|
|
// .llvm_bb_addr_map section associated with every unique text section.
|
|
return Ctx->getELFSection(".llvm_bb_addr_map", ELF::SHT_LLVM_BB_ADDR_MAP,
|
|
Flags, 0, GroupName, true, ElfSec.getUniqueID(),
|
|
cast<MCSymbolELF>(TextSec.getBeginSymbol()));
|
|
}
|
|
|
|
MCSection *
|
|
MCObjectFileInfo::getPseudoProbeSection(const MCSection *TextSec) const {
|
|
if (Ctx->getObjectFileType() == MCContext::IsELF) {
|
|
const auto *ElfSec = static_cast<const MCSectionELF *>(TextSec);
|
|
// Create a separate section for probes that comes with a comdat function.
|
|
if (const MCSymbol *Group = ElfSec->getGroup()) {
|
|
auto *S = static_cast<MCSectionELF *>(PseudoProbeSection);
|
|
auto Flags = S->getFlags() | ELF::SHF_GROUP;
|
|
return Ctx->getELFSection(S->getName(), S->getType(), Flags,
|
|
S->getEntrySize(), Group->getName(),
|
|
/*IsComdat=*/true);
|
|
}
|
|
}
|
|
return PseudoProbeSection;
|
|
}
|
|
|
|
MCSection *
|
|
MCObjectFileInfo::getPseudoProbeDescSection(StringRef FuncName) const {
|
|
if (Ctx->getObjectFileType() == MCContext::IsELF) {
|
|
// Create a separate comdat group for each function's descriptor in order
|
|
// for the linker to deduplicate. The duplication, must be from different
|
|
// tranlation unit, can come from:
|
|
// 1. Inline functions defined in header files;
|
|
// 2. ThinLTO imported funcions;
|
|
// 3. Weak-linkage definitions.
|
|
// Use a concatenation of the section name and the function name as the
|
|
// group name so that descriptor-only groups won't be folded with groups of
|
|
// code.
|
|
if (Ctx->getTargetTriple().supportsCOMDAT() && !FuncName.empty()) {
|
|
auto *S = static_cast<MCSectionELF *>(PseudoProbeDescSection);
|
|
auto Flags = S->getFlags() | ELF::SHF_GROUP;
|
|
return Ctx->getELFSection(S->getName(), S->getType(), Flags,
|
|
S->getEntrySize(),
|
|
S->getName() + "_" + FuncName,
|
|
/*IsComdat=*/true);
|
|
}
|
|
}
|
|
return PseudoProbeDescSection;
|
|
}
|