forked from OSchip/llvm-project
707 lines
29 KiB
C++
707 lines
29 KiB
C++
//===-- MObjectFileInfo.cpp - Object File Information ---------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/MC/MCObjectFileInfo.h"
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#include "llvm/ADT/Triple.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/MCSectionELF.h"
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#include "llvm/MC/MCSectionMachO.h"
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using namespace llvm;
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void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
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// MachO
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IsFunctionEHFrameSymbolPrivate = false;
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SupportsWeakOmittedEHFrame = false;
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PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel
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| dwarf::DW_EH_PE_sdata4;
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LSDAEncoding = FDEEncoding = FDECFIEncoding = dwarf::DW_EH_PE_pcrel;
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TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
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dwarf::DW_EH_PE_sdata4;
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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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MCSectionMachO::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,
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SectionKind::getDataRel());
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TLSDataSection // .tdata
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= Ctx->getMachOSection("__DATA", "__thread_data",
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MCSectionMachO::S_THREAD_LOCAL_REGULAR,
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SectionKind::getDataRel());
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TLSBSSSection // .tbss
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= Ctx->getMachOSection("__DATA", "__thread_bss",
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MCSectionMachO::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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MCSectionMachO::S_THREAD_LOCAL_VARIABLES,
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SectionKind::getDataRel());
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TLSThreadInitSection
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= Ctx->getMachOSection("__DATA", "__thread_init",
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MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
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SectionKind::getDataRel());
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CStringSection // .cstring
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= Ctx->getMachOSection("__TEXT", "__cstring",
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MCSectionMachO::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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MCSectionMachO::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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MCSectionMachO::S_8BYTE_LITERALS,
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SectionKind::getMergeableConst8());
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// ld_classic doesn't support .literal16 in 32-bit mode, and ld64 falls back
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// to using it in -static mode.
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SixteenByteConstantSection = 0;
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if (RelocM != Reloc::Static &&
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T.getArch() != Triple::x86_64 && T.getArch() != Triple::ppc64 &&
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T.getArch() != Triple::ppc64le)
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SixteenByteConstantSection = // .literal16
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Ctx->getMachOSection("__TEXT", "__literal16",
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MCSectionMachO::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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TextCoalSection
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= Ctx->getMachOSection("__TEXT", "__textcoal_nt",
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MCSectionMachO::S_COALESCED |
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MCSectionMachO::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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MCSectionMachO::S_COALESCED,
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SectionKind::getReadOnly());
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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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DataCoalSection
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= Ctx->getMachOSection("__DATA","__datacoal_nt",
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MCSectionMachO::S_COALESCED,
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SectionKind::getDataRel());
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DataCommonSection
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= Ctx->getMachOSection("__DATA","__common",
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MCSectionMachO::S_ZEROFILL,
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SectionKind::getBSS());
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DataBSSSection
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= Ctx->getMachOSection("__DATA","__bss", MCSectionMachO::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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MCSectionMachO::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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MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
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SectionKind::getMetadata());
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if (RelocM == Reloc::Static) {
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StaticCtorSection
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= Ctx->getMachOSection("__TEXT", "__constructor", 0,
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SectionKind::getDataRel());
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StaticDtorSection
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= Ctx->getMachOSection("__TEXT", "__destructor", 0,
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SectionKind::getDataRel());
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} else {
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StaticCtorSection
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= Ctx->getMachOSection("__DATA", "__mod_init_func",
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MCSectionMachO::S_MOD_INIT_FUNC_POINTERS,
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SectionKind::getDataRel());
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StaticDtorSection
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= Ctx->getMachOSection("__DATA", "__mod_term_func",
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MCSectionMachO::S_MOD_TERM_FUNC_POINTERS,
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SectionKind::getDataRel());
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}
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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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if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6)) {
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CompactUnwindSection =
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Ctx->getMachOSection("__LD", "__compact_unwind",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getReadOnly());
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if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)
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CompactUnwindDwarfEHFrameOnly = 0x04000000;
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}
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// Debug Information.
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DwarfAccelNamesSection =
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Ctx->getMachOSection("__DWARF", "__apple_names",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfAccelObjCSection =
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Ctx->getMachOSection("__DWARF", "__apple_objc",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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// 16 character section limit...
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DwarfAccelNamespaceSection =
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Ctx->getMachOSection("__DWARF", "__apple_namespac",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfAccelTypesSection =
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Ctx->getMachOSection("__DWARF", "__apple_types",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfAbbrevSection =
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Ctx->getMachOSection("__DWARF", "__debug_abbrev",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfInfoSection =
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Ctx->getMachOSection("__DWARF", "__debug_info",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfLineSection =
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Ctx->getMachOSection("__DWARF", "__debug_line",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfFrameSection =
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Ctx->getMachOSection("__DWARF", "__debug_frame",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfPubNamesSection =
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Ctx->getMachOSection("__DWARF", "__debug_pubnames",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfPubTypesSection =
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Ctx->getMachOSection("__DWARF", "__debug_pubtypes",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfStrSection =
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Ctx->getMachOSection("__DWARF", "__debug_str",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfLocSection =
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Ctx->getMachOSection("__DWARF", "__debug_loc",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfARangesSection =
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Ctx->getMachOSection("__DWARF", "__debug_aranges",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfRangesSection =
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Ctx->getMachOSection("__DWARF", "__debug_ranges",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfMacroInfoSection =
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Ctx->getMachOSection("__DWARF", "__debug_macinfo",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfDebugInlineSection =
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Ctx->getMachOSection("__DWARF", "__debug_inlined",
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MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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TLSExtraDataSection = TLSTLVSection;
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}
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void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
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if (T.getArch() == Triple::mips ||
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T.getArch() == Triple::mipsel)
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FDECFIEncoding = dwarf::DW_EH_PE_sdata4;
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else if (T.getArch() == Triple::mips64 ||
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T.getArch() == Triple::mips64el)
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FDECFIEncoding = dwarf::DW_EH_PE_sdata8;
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else
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FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
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if (T.getArch() == Triple::x86) {
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PersonalityEncoding = (RelocM == Reloc::PIC_)
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? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
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: dwarf::DW_EH_PE_absptr;
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LSDAEncoding = (RelocM == Reloc::PIC_)
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? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
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: dwarf::DW_EH_PE_absptr;
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FDEEncoding = (RelocM == Reloc::PIC_)
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? dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
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: dwarf::DW_EH_PE_absptr;
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TTypeEncoding = (RelocM == Reloc::PIC_)
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? dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4
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: dwarf::DW_EH_PE_absptr;
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} else if (T.getArch() == Triple::x86_64) {
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if (RelocM == Reloc::PIC_) {
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PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
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((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
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? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
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LSDAEncoding = dwarf::DW_EH_PE_pcrel |
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(CMModel == CodeModel::Small
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? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
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FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
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TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
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((CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
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? dwarf::DW_EH_PE_sdata4 : dwarf::DW_EH_PE_sdata8);
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} else {
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PersonalityEncoding =
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(CMModel == CodeModel::Small || CMModel == CodeModel::Medium)
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? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
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LSDAEncoding = (CMModel == CodeModel::Small)
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? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
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FDEEncoding = dwarf::DW_EH_PE_udata4;
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TTypeEncoding = (CMModel == CodeModel::Small)
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? dwarf::DW_EH_PE_udata4 : dwarf::DW_EH_PE_absptr;
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}
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} else if (T.getArch() == Triple::aarch64) {
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// The small model guarantees static code/data size < 4GB, but not where it
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// will be in memory. Most of these could end up >2GB away so even a signed
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// pc-relative 32-bit address is insufficient, theoretically.
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if (RelocM == Reloc::PIC_) {
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PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
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dwarf::DW_EH_PE_sdata8;
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LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8;
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FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
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TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
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dwarf::DW_EH_PE_sdata8;
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} else {
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PersonalityEncoding = dwarf::DW_EH_PE_absptr;
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LSDAEncoding = dwarf::DW_EH_PE_absptr;
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FDEEncoding = dwarf::DW_EH_PE_udata4;
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TTypeEncoding = dwarf::DW_EH_PE_absptr;
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}
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} else if (T.getArch() == Triple::ppc64 || T.getArch() == Triple::ppc64le) {
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PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
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dwarf::DW_EH_PE_udata8;
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LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
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FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
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TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
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dwarf::DW_EH_PE_udata8;
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} else if (T.getArch() == Triple::systemz) {
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// All currently-defined code models guarantee that 4-byte PC-relative
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// values will be in range.
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if (RelocM == Reloc::PIC_) {
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PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
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dwarf::DW_EH_PE_sdata4;
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LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
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FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
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TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
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dwarf::DW_EH_PE_sdata4;
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} else {
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PersonalityEncoding = dwarf::DW_EH_PE_absptr;
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LSDAEncoding = dwarf::DW_EH_PE_absptr;
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FDEEncoding = dwarf::DW_EH_PE_absptr;
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TTypeEncoding = dwarf::DW_EH_PE_absptr;
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}
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}
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// Solaris requires different flags for .eh_frame to seemingly every other
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// platform.
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EHSectionType = ELF::SHT_PROGBITS;
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EHSectionFlags = ELF::SHF_ALLOC;
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if (T.getOS() == Triple::Solaris) {
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if (T.getArch() == Triple::x86_64)
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EHSectionType = ELF::SHT_X86_64_UNWIND;
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else
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EHSectionFlags |= ELF::SHF_WRITE;
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}
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// ELF
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BSSSection =
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Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
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ELF::SHF_WRITE | ELF::SHF_ALLOC,
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SectionKind::getBSS());
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TextSection =
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Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
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ELF::SHF_EXECINSTR |
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ELF::SHF_ALLOC,
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SectionKind::getText());
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DataSection =
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Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
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ELF::SHF_WRITE |ELF::SHF_ALLOC,
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SectionKind::getDataRel());
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ReadOnlySection =
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Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC,
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SectionKind::getReadOnly());
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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 |
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ELF::SHF_WRITE,
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SectionKind::getThreadData());
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TLSBSSSection =
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Ctx->getELFSection(".tbss", ELF::SHT_NOBITS,
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ELF::SHF_ALLOC | ELF::SHF_TLS |
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ELF::SHF_WRITE,
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SectionKind::getThreadBSS());
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DataRelSection =
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Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC |ELF::SHF_WRITE,
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SectionKind::getDataRel());
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DataRelLocalSection =
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Ctx->getELFSection(".data.rel.local", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC |ELF::SHF_WRITE,
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SectionKind::getDataRelLocal());
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DataRelROSection =
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Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC |ELF::SHF_WRITE,
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SectionKind::getReadOnlyWithRel());
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DataRelROLocalSection =
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Ctx->getELFSection(".data.rel.ro.local", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC |ELF::SHF_WRITE,
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SectionKind::getReadOnlyWithRelLocal());
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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,
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SectionKind::getMergeableConst4());
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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,
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SectionKind::getMergeableConst8());
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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,
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SectionKind::getMergeableConst16());
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StaticCtorSection =
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Ctx->getELFSection(".ctors", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC |ELF::SHF_WRITE,
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SectionKind::getDataRel());
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StaticDtorSection =
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Ctx->getELFSection(".dtors", ELF::SHT_PROGBITS,
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ELF::SHF_ALLOC |ELF::SHF_WRITE,
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SectionKind::getDataRel());
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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.
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LSDASection =
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Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS,
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|
ELF::SHF_ALLOC,
|
|
SectionKind::getReadOnly());
|
|
|
|
// Debug Info Sections.
|
|
DwarfAbbrevSection =
|
|
Ctx->getELFSection(".debug_abbrev", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfInfoSection =
|
|
Ctx->getELFSection(".debug_info", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfLineSection =
|
|
Ctx->getELFSection(".debug_line", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfFrameSection =
|
|
Ctx->getELFSection(".debug_frame", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfPubNamesSection =
|
|
Ctx->getELFSection(".debug_pubnames", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfPubTypesSection =
|
|
Ctx->getELFSection(".debug_pubtypes", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfStrSection =
|
|
Ctx->getELFSection(".debug_str", ELF::SHT_PROGBITS,
|
|
ELF::SHF_MERGE | ELF::SHF_STRINGS,
|
|
SectionKind::getMergeable1ByteCString());
|
|
DwarfLocSection =
|
|
Ctx->getELFSection(".debug_loc", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfARangesSection =
|
|
Ctx->getELFSection(".debug_aranges", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfRangesSection =
|
|
Ctx->getELFSection(".debug_ranges", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfMacroInfoSection =
|
|
Ctx->getELFSection(".debug_macinfo", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
|
|
// DWARF5 Experimental Debug Info
|
|
|
|
// Accelerator Tables
|
|
DwarfAccelNamesSection =
|
|
Ctx->getELFSection(".apple_names", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfAccelObjCSection =
|
|
Ctx->getELFSection(".apple_objc", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfAccelNamespaceSection =
|
|
Ctx->getELFSection(".apple_namespaces", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfAccelTypesSection =
|
|
Ctx->getELFSection(".apple_types", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
|
|
// Fission Sections
|
|
DwarfInfoDWOSection =
|
|
Ctx->getELFSection(".debug_info.dwo", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfAbbrevDWOSection =
|
|
Ctx->getELFSection(".debug_abbrev.dwo", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfStrDWOSection =
|
|
Ctx->getELFSection(".debug_str.dwo", ELF::SHT_PROGBITS,
|
|
ELF::SHF_MERGE | ELF::SHF_STRINGS,
|
|
SectionKind::getMergeable1ByteCString());
|
|
DwarfLineDWOSection =
|
|
Ctx->getELFSection(".debug_line.dwo", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfLocDWOSection =
|
|
Ctx->getELFSection(".debug_loc.dwo", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfStrOffDWOSection =
|
|
Ctx->getELFSection(".debug_str_offsets.dwo", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
DwarfAddrSection =
|
|
Ctx->getELFSection(".debug_addr", ELF::SHT_PROGBITS, 0,
|
|
SectionKind::getMetadata());
|
|
}
|
|
|
|
|
|
void MCObjectFileInfo::InitCOFFMCObjectFileInfo(Triple T) {
|
|
// COFF
|
|
TextSection =
|
|
Ctx->getCOFFSection(".text",
|
|
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::getDataRel());
|
|
ReadOnlySection =
|
|
Ctx->getCOFFSection(".rdata",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getReadOnly());
|
|
if (T.getOS() == Triple::Win32) {
|
|
StaticCtorSection =
|
|
Ctx->getCOFFSection(".CRT$XCU",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getReadOnly());
|
|
} else {
|
|
StaticCtorSection =
|
|
Ctx->getCOFFSection(".ctors",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ |
|
|
COFF::IMAGE_SCN_MEM_WRITE,
|
|
SectionKind::getDataRel());
|
|
}
|
|
|
|
|
|
if (T.getOS() == Triple::Win32) {
|
|
StaticDtorSection =
|
|
Ctx->getCOFFSection(".CRT$XTX",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getReadOnly());
|
|
} else {
|
|
StaticDtorSection =
|
|
Ctx->getCOFFSection(".dtors",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ |
|
|
COFF::IMAGE_SCN_MEM_WRITE,
|
|
SectionKind::getDataRel());
|
|
}
|
|
|
|
// 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.
|
|
LSDASection =
|
|
Ctx->getCOFFSection(".gcc_except_table",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getReadOnly());
|
|
|
|
// Debug info.
|
|
DwarfAbbrevSection =
|
|
Ctx->getCOFFSection(".debug_abbrev",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
DwarfInfoSection =
|
|
Ctx->getCOFFSection(".debug_info",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
DwarfLineSection =
|
|
Ctx->getCOFFSection(".debug_line",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
DwarfFrameSection =
|
|
Ctx->getCOFFSection(".debug_frame",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
DwarfPubNamesSection =
|
|
Ctx->getCOFFSection(".debug_pubnames",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
DwarfPubTypesSection =
|
|
Ctx->getCOFFSection(".debug_pubtypes",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
DwarfStrSection =
|
|
Ctx->getCOFFSection(".debug_str",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
DwarfLocSection =
|
|
Ctx->getCOFFSection(".debug_loc",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
DwarfARangesSection =
|
|
Ctx->getCOFFSection(".debug_aranges",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
DwarfRangesSection =
|
|
Ctx->getCOFFSection(".debug_ranges",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
DwarfMacroInfoSection =
|
|
Ctx->getCOFFSection(".debug_macinfo",
|
|
COFF::IMAGE_SCN_MEM_DISCARDABLE |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getMetadata());
|
|
|
|
DrectveSection =
|
|
Ctx->getCOFFSection(".drectve",
|
|
COFF::IMAGE_SCN_LNK_INFO,
|
|
SectionKind::getMetadata());
|
|
|
|
PDataSection =
|
|
Ctx->getCOFFSection(".pdata",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getDataRel());
|
|
|
|
XDataSection =
|
|
Ctx->getCOFFSection(".xdata",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ,
|
|
SectionKind::getDataRel());
|
|
TLSDataSection =
|
|
Ctx->getCOFFSection(".tls$",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ |
|
|
COFF::IMAGE_SCN_MEM_WRITE,
|
|
SectionKind::getDataRel());
|
|
}
|
|
|
|
void MCObjectFileInfo::InitMCObjectFileInfo(StringRef TT, Reloc::Model relocm,
|
|
CodeModel::Model cm,
|
|
MCContext &ctx) {
|
|
RelocM = relocm;
|
|
CMModel = cm;
|
|
Ctx = &ctx;
|
|
|
|
// Common.
|
|
CommDirectiveSupportsAlignment = true;
|
|
SupportsWeakOmittedEHFrame = true;
|
|
IsFunctionEHFrameSymbolPrivate = true;
|
|
|
|
PersonalityEncoding = LSDAEncoding = FDEEncoding = FDECFIEncoding =
|
|
TTypeEncoding = dwarf::DW_EH_PE_absptr;
|
|
|
|
CompactUnwindDwarfEHFrameOnly = 0;
|
|
|
|
EHFrameSection = 0; // Created on demand.
|
|
CompactUnwindSection = 0; // Used only by selected targets.
|
|
DwarfAccelNamesSection = 0; // Used only by selected targets.
|
|
DwarfAccelObjCSection = 0; // Used only by selected targets.
|
|
DwarfAccelNamespaceSection = 0; // Used only by selected targets.
|
|
DwarfAccelTypesSection = 0; // Used only by selected targets.
|
|
|
|
Triple T(TT);
|
|
Triple::ArchType Arch = T.getArch();
|
|
// FIXME: Checking for Arch here to filter out bogus triples such as
|
|
// cellspu-apple-darwin. Perhaps we should fix in Triple?
|
|
if ((Arch == Triple::x86 || Arch == Triple::x86_64 ||
|
|
Arch == Triple::arm || Arch == Triple::thumb ||
|
|
Arch == Triple::ppc || Arch == Triple::ppc64 ||
|
|
Arch == Triple::UnknownArch) &&
|
|
(T.isOSDarwin() || T.getEnvironment() == Triple::MachO)) {
|
|
Env = IsMachO;
|
|
InitMachOMCObjectFileInfo(T);
|
|
} else if ((Arch == Triple::x86 || Arch == Triple::x86_64) &&
|
|
(T.getEnvironment() != Triple::ELF) &&
|
|
(T.getOS() == Triple::MinGW32 || T.getOS() == Triple::Cygwin ||
|
|
T.getOS() == Triple::Win32)) {
|
|
Env = IsCOFF;
|
|
InitCOFFMCObjectFileInfo(T);
|
|
} else {
|
|
Env = IsELF;
|
|
InitELFMCObjectFileInfo(T);
|
|
}
|
|
}
|
|
|
|
void MCObjectFileInfo::InitEHFrameSection() {
|
|
if (Env == IsMachO)
|
|
EHFrameSection =
|
|
Ctx->getMachOSection("__TEXT", "__eh_frame",
|
|
MCSectionMachO::S_COALESCED |
|
|
MCSectionMachO::S_ATTR_NO_TOC |
|
|
MCSectionMachO::S_ATTR_STRIP_STATIC_SYMS |
|
|
MCSectionMachO::S_ATTR_LIVE_SUPPORT,
|
|
SectionKind::getReadOnly());
|
|
else if (Env == IsELF)
|
|
EHFrameSection =
|
|
Ctx->getELFSection(".eh_frame", EHSectionType,
|
|
EHSectionFlags,
|
|
SectionKind::getDataRel());
|
|
else
|
|
EHFrameSection =
|
|
Ctx->getCOFFSection(".eh_frame",
|
|
COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
|
|
COFF::IMAGE_SCN_MEM_READ |
|
|
COFF::IMAGE_SCN_MEM_WRITE,
|
|
SectionKind::getDataRel());
|
|
}
|