diff options
Diffstat (limited to 'gnu/llvm/lib/MC/MCObjectFileInfo.cpp')
| -rw-r--r-- | gnu/llvm/lib/MC/MCObjectFileInfo.cpp | 847 |
1 files changed, 0 insertions, 847 deletions
diff --git a/gnu/llvm/lib/MC/MCObjectFileInfo.cpp b/gnu/llvm/lib/MC/MCObjectFileInfo.cpp deleted file mode 100644 index 9e35355d06e..00000000000 --- a/gnu/llvm/lib/MC/MCObjectFileInfo.cpp +++ /dev/null @@ -1,847 +0,0 @@ -//===-- MCObjectFileInfo.cpp - Object File Information --------------------===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// - -#include "llvm/MC/MCObjectFileInfo.h" -#include "llvm/ADT/StringExtras.h" -#include "llvm/ADT/Triple.h" -#include "llvm/BinaryFormat/COFF.h" -#include "llvm/BinaryFormat/ELF.h" -#include "llvm/MC/MCAsmInfo.h" -#include "llvm/MC/MCContext.h" -#include "llvm/MC/MCSection.h" -#include "llvm/MC/MCSectionCOFF.h" -#include "llvm/MC/MCSectionELF.h" -#include "llvm/MC/MCSectionMachO.h" -#include "llvm/MC/MCSectionWasm.h" - -using namespace llvm; - -static bool useCompactUnwind(const Triple &T) { - // Only on darwin. - if (!T.isOSDarwin()) - return false; - - // aarch64 always has it. - if (T.getArch() == Triple::aarch64) - return true; - - // armv7k always has it. - if (T.isWatchABI()) - return true; - - // Use it on newer version of OS X. - if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6)) - return true; - - // And the iOS simulator. - if (T.isiOS() && - (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86)) - return true; - - return false; -} - -void MCObjectFileInfo::initMachOMCObjectFileInfo(const Triple &T) { - // MachO - SupportsWeakOmittedEHFrame = false; - - EHFrameSection = Ctx->getMachOSection( - "__TEXT", "__eh_frame", - MachO::S_COALESCED | MachO::S_ATTR_NO_TOC | - MachO::S_ATTR_STRIP_STATIC_SYMS | MachO::S_ATTR_LIVE_SUPPORT, - SectionKind::getReadOnly()); - - if (T.isOSDarwin() && T.getArch() == Triple::aarch64) - SupportsCompactUnwindWithoutEHFrame = true; - - if (T.isWatchABI()) - OmitDwarfIfHaveCompactUnwind = true; - - FDECFIEncoding = dwarf::DW_EH_PE_pcrel; - - // .comm doesn't support alignment before Leopard. - if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5)) - CommDirectiveSupportsAlignment = false; - - TextSection // .text - = Ctx->getMachOSection("__TEXT", "__text", - MachO::S_ATTR_PURE_INSTRUCTIONS, - SectionKind::getText()); - DataSection // .data - = Ctx->getMachOSection("__DATA", "__data", 0, SectionKind::getData()); - - // BSSSection might not be expected initialized on msvc. - BSSSection = nullptr; - - TLSDataSection // .tdata - = Ctx->getMachOSection("__DATA", "__thread_data", - MachO::S_THREAD_LOCAL_REGULAR, - SectionKind::getData()); - TLSBSSSection // .tbss - = Ctx->getMachOSection("__DATA", "__thread_bss", - MachO::S_THREAD_LOCAL_ZEROFILL, - SectionKind::getThreadBSS()); - - // TODO: Verify datarel below. - TLSTLVSection // .tlv - = Ctx->getMachOSection("__DATA", "__thread_vars", - MachO::S_THREAD_LOCAL_VARIABLES, - SectionKind::getData()); - - TLSThreadInitSection = Ctx->getMachOSection( - "__DATA", "__thread_init", MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS, - SectionKind::getData()); - - CStringSection // .cstring - = Ctx->getMachOSection("__TEXT", "__cstring", - MachO::S_CSTRING_LITERALS, - SectionKind::getMergeable1ByteCString()); - UStringSection - = Ctx->getMachOSection("__TEXT","__ustring", 0, - SectionKind::getMergeable2ByteCString()); - FourByteConstantSection // .literal4 - = Ctx->getMachOSection("__TEXT", "__literal4", - MachO::S_4BYTE_LITERALS, - SectionKind::getMergeableConst4()); - EightByteConstantSection // .literal8 - = Ctx->getMachOSection("__TEXT", "__literal8", - MachO::S_8BYTE_LITERALS, - SectionKind::getMergeableConst8()); - - SixteenByteConstantSection // .literal16 - = Ctx->getMachOSection("__TEXT", "__literal16", - MachO::S_16BYTE_LITERALS, - SectionKind::getMergeableConst16()); - - ReadOnlySection // .const - = Ctx->getMachOSection("__TEXT", "__const", 0, - SectionKind::getReadOnly()); - - // If the target is not powerpc, map the coal sections to the non-coal - // sections. - // - // "__TEXT/__textcoal_nt" => section "__TEXT/__text" - // "__TEXT/__const_coal" => section "__TEXT/__const" - // "__DATA/__datacoal_nt" => section "__DATA/__data" - Triple::ArchType ArchTy = T.getArch(); - - ConstDataSection // .const_data - = Ctx->getMachOSection("__DATA", "__const", 0, - SectionKind::getReadOnlyWithRel()); - - if (ArchTy == Triple::ppc || ArchTy == Triple::ppc64) { - TextCoalSection - = Ctx->getMachOSection("__TEXT", "__textcoal_nt", - MachO::S_COALESCED | - MachO::S_ATTR_PURE_INSTRUCTIONS, - SectionKind::getText()); - ConstTextCoalSection - = Ctx->getMachOSection("__TEXT", "__const_coal", - MachO::S_COALESCED, - SectionKind::getReadOnly()); - DataCoalSection = Ctx->getMachOSection( - "__DATA", "__datacoal_nt", MachO::S_COALESCED, SectionKind::getData()); - ConstDataCoalSection = DataCoalSection; - } else { - TextCoalSection = TextSection; - ConstTextCoalSection = ReadOnlySection; - DataCoalSection = DataSection; - ConstDataCoalSection = ConstDataSection; - } - - DataCommonSection - = Ctx->getMachOSection("__DATA","__common", - MachO::S_ZEROFILL, - SectionKind::getBSS()); - DataBSSSection - = Ctx->getMachOSection("__DATA","__bss", MachO::S_ZEROFILL, - SectionKind::getBSS()); - - - LazySymbolPointerSection - = Ctx->getMachOSection("__DATA", "__la_symbol_ptr", - MachO::S_LAZY_SYMBOL_POINTERS, - SectionKind::getMetadata()); - NonLazySymbolPointerSection - = Ctx->getMachOSection("__DATA", "__nl_symbol_ptr", - MachO::S_NON_LAZY_SYMBOL_POINTERS, - SectionKind::getMetadata()); - - ThreadLocalPointerSection - = Ctx->getMachOSection("__DATA", "__thread_ptr", - MachO::S_THREAD_LOCAL_VARIABLE_POINTERS, - SectionKind::getMetadata()); - - // Exception Handling. - LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0, - SectionKind::getReadOnlyWithRel()); - - COFFDebugSymbolsSection = nullptr; - COFFDebugTypesSection = nullptr; - COFFGlobalTypeHashesSection = nullptr; - - if (useCompactUnwind(T)) { - CompactUnwindSection = - Ctx->getMachOSection("__LD", "__compact_unwind", MachO::S_ATTR_DEBUG, - SectionKind::getReadOnly()); - - if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86) - CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_X86_64_MODE_DWARF - else if (T.getArch() == Triple::aarch64) - CompactUnwindDwarfEHFrameOnly = 0x03000000; // UNWIND_ARM64_MODE_DWARF - else if (T.getArch() == Triple::arm || T.getArch() == Triple::thumb) - CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_ARM_MODE_DWARF - } - - // Debug Information. - DwarfDebugNamesSection = - Ctx->getMachOSection("__DWARF", "__debug_names", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "debug_names_begin"); - DwarfAccelNamesSection = - Ctx->getMachOSection("__DWARF", "__apple_names", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "names_begin"); - DwarfAccelObjCSection = - Ctx->getMachOSection("__DWARF", "__apple_objc", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "objc_begin"); - // 16 character section limit... - DwarfAccelNamespaceSection = - Ctx->getMachOSection("__DWARF", "__apple_namespac", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "namespac_begin"); - DwarfAccelTypesSection = - Ctx->getMachOSection("__DWARF", "__apple_types", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "types_begin"); - - DwarfSwiftASTSection = - Ctx->getMachOSection("__DWARF", "__swift_ast", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - - DwarfAbbrevSection = - Ctx->getMachOSection("__DWARF", "__debug_abbrev", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "section_abbrev"); - DwarfInfoSection = - Ctx->getMachOSection("__DWARF", "__debug_info", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "section_info"); - DwarfLineSection = - Ctx->getMachOSection("__DWARF", "__debug_line", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "section_line"); - DwarfLineStrSection = - Ctx->getMachOSection("__DWARF", "__debug_line_str", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "section_line_str"); - DwarfFrameSection = - Ctx->getMachOSection("__DWARF", "__debug_frame", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfPubNamesSection = - Ctx->getMachOSection("__DWARF", "__debug_pubnames", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfPubTypesSection = - Ctx->getMachOSection("__DWARF", "__debug_pubtypes", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfGnuPubNamesSection = - Ctx->getMachOSection("__DWARF", "__debug_gnu_pubn", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfGnuPubTypesSection = - Ctx->getMachOSection("__DWARF", "__debug_gnu_pubt", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfStrSection = - Ctx->getMachOSection("__DWARF", "__debug_str", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "info_string"); - DwarfStrOffSection = - Ctx->getMachOSection("__DWARF", "__debug_str_offs", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "section_str_off"); - DwarfAddrSection = - Ctx->getMachOSection("__DWARF", "__debug_addr", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "section_info"); - DwarfLocSection = - Ctx->getMachOSection("__DWARF", "__debug_loc", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "section_debug_loc"); - DwarfLoclistsSection = - Ctx->getMachOSection("__DWARF", "__debug_loclists", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "section_debug_loc"); - - DwarfARangesSection = - Ctx->getMachOSection("__DWARF", "__debug_aranges", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfRangesSection = - Ctx->getMachOSection("__DWARF", "__debug_ranges", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "debug_range"); - DwarfRnglistsSection = - Ctx->getMachOSection("__DWARF", "__debug_rnglists", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "debug_range"); - DwarfMacinfoSection = - Ctx->getMachOSection("__DWARF", "__debug_macinfo", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata(), "debug_macinfo"); - DwarfDebugInlineSection = - Ctx->getMachOSection("__DWARF", "__debug_inlined", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfCUIndexSection = - Ctx->getMachOSection("__DWARF", "__debug_cu_index", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - DwarfTUIndexSection = - Ctx->getMachOSection("__DWARF", "__debug_tu_index", MachO::S_ATTR_DEBUG, - SectionKind::getMetadata()); - StackMapSection = Ctx->getMachOSection("__LLVM_STACKMAPS", "__llvm_stackmaps", - 0, SectionKind::getMetadata()); - - FaultMapSection = Ctx->getMachOSection("__LLVM_FAULTMAPS", "__llvm_faultmaps", - 0, SectionKind::getMetadata()); - - TLSExtraDataSection = TLSTLVSection; -} - -void MCObjectFileInfo::initELFMCObjectFileInfo(const Triple &T, bool Large) { - switch (T.getArch()) { - case Triple::mips: - case Triple::mipsel: - case Triple::mips64: - case Triple::mips64el: - FDECFIEncoding = Ctx->getAsmInfo()->getCodePointerSize() == 4 - ? dwarf::DW_EH_PE_sdata4 - : dwarf::DW_EH_PE_sdata8; - break; - case Triple::ppc64: - case Triple::ppc64le: - case Triple::x86_64: - FDECFIEncoding = dwarf::DW_EH_PE_pcrel | - (Large ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4); - break; - case Triple::bpfel: - case Triple::bpfeb: - FDECFIEncoding = dwarf::DW_EH_PE_sdata8; - break; - case Triple::hexagon: - FDECFIEncoding = - PositionIndependent ? dwarf::DW_EH_PE_pcrel : dwarf::DW_EH_PE_absptr; - break; - default: - FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; - break; - } - - unsigned EHSectionType = T.getArch() == Triple::x86_64 - ? ELF::SHT_X86_64_UNWIND - : ELF::SHT_PROGBITS; - - // Solaris requires different flags for .eh_frame to seemingly every other - // platform. - unsigned EHSectionFlags = ELF::SHF_ALLOC; - if (T.isOSSolaris() && T.getArch() != Triple::x86_64) - EHSectionFlags |= ELF::SHF_WRITE; - - // ELF - BSSSection = Ctx->getELFSection(".bss", ELF::SHT_NOBITS, - ELF::SHF_WRITE | ELF::SHF_ALLOC); - - TextSection = Ctx->getELFSection(".text", ELF::SHT_PROGBITS, - ELF::SHF_EXECINSTR | ELF::SHF_ALLOC); - - DataSection = Ctx->getELFSection(".data", ELF::SHT_PROGBITS, - ELF::SHF_WRITE | ELF::SHF_ALLOC); - - ReadOnlySection = - Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS, ELF::SHF_ALLOC); - - TLSDataSection = - Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE); - - TLSBSSSection = Ctx->getELFSection( - ".tbss", ELF::SHT_NOBITS, ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE); - - DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC | ELF::SHF_WRITE); - - MergeableConst4Section = - Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC | ELF::SHF_MERGE, 4, ""); - - MergeableConst8Section = - Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC | ELF::SHF_MERGE, 8, ""); - - MergeableConst16Section = - Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC | ELF::SHF_MERGE, 16, ""); - - MergeableConst32Section = - Ctx->getELFSection(".rodata.cst32", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC | ELF::SHF_MERGE, 32, ""); - - // Exception Handling Sections. - - // FIXME: We're emitting LSDA info into a readonly section on ELF, even though - // it contains relocatable pointers. In PIC mode, this is probably a big - // runtime hit for C++ apps. Either the contents of the LSDA need to be - // adjusted or this should be a data section. - LSDASection = Ctx->getELFSection(".gcc_except_table", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC); - - COFFDebugSymbolsSection = nullptr; - COFFDebugTypesSection = nullptr; - - unsigned DebugSecType = ELF::SHT_PROGBITS; - - // MIPS .debug_* sections should have SHT_MIPS_DWARF section type - // to distinguish among sections contain DWARF and ECOFF debug formats. - // Sections with ECOFF debug format are obsoleted and marked by SHT_PROGBITS. - if (T.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); - - // 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); - - // DWP Sections - DwarfCUIndexSection = - Ctx->getELFSection(".debug_cu_index", DebugSecType, 0); - DwarfTUIndexSection = - Ctx->getELFSection(".debug_tu_index", DebugSecType, 0); - - StackMapSection = - Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC); - - FaultMapSection = - Ctx->getELFSection(".llvm_faultmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC); - - EHFrameSection = - Ctx->getELFSection(".eh_frame", EHSectionType, EHSectionFlags); - - StackSizesSection = Ctx->getELFSection(".stack_sizes", ELF::SHT_PROGBITS, 0); -} - -void MCObjectFileInfo::initCOFFMCObjectFileInfo(const Triple &T) { - EHFrameSection = - Ctx->getCOFFSection(".eh_frame", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - 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) { - // On Windows 64 with SEH, the LSDA is emitted into the .xdata section - LSDASection = nullptr; - } else { - LSDASection = Ctx->getCOFFSection(".gcc_except_table", - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getReadOnly()); - } - - // Debug info. - COFFDebugSymbolsSection = - Ctx->getCOFFSection(".debug$S", (COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ), - SectionKind::getMetadata()); - COFFDebugTypesSection = - Ctx->getCOFFSection(".debug$T", (COFF::IMAGE_SCN_MEM_DISCARDABLE | - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ), - SectionKind::getMetadata()); - 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"); - DwarfARangesSection = Ctx->getCOFFSection( - ".debug_aranges", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfRangesSection = Ctx->getCOFFSection( - ".debug_ranges", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata(), "debug_range"); - DwarfMacinfoSection = Ctx->getCOFFSection( - ".debug_macinfo", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata(), "debug_macinfo"); - DwarfInfoDWOSection = Ctx->getCOFFSection( - ".debug_info.dwo", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata(), "section_info_dwo"); - DwarfTypesDWOSection = Ctx->getCOFFSection( - ".debug_types.dwo", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata(), "section_types_dwo"); - DwarfAbbrevDWOSection = Ctx->getCOFFSection( - ".debug_abbrev.dwo", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata(), "section_abbrev_dwo"); - DwarfStrDWOSection = Ctx->getCOFFSection( - ".debug_str.dwo", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata(), "skel_string"); - DwarfLineDWOSection = Ctx->getCOFFSection( - ".debug_line.dwo", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfLocDWOSection = Ctx->getCOFFSection( - ".debug_loc.dwo", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata(), "skel_loc"); - DwarfStrOffDWOSection = Ctx->getCOFFSection( - ".debug_str_offsets.dwo", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata(), "section_str_off_dwo"); - DwarfAddrSection = Ctx->getCOFFSection( - ".debug_addr", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata(), "addr_sec"); - DwarfCUIndexSection = Ctx->getCOFFSection( - ".debug_cu_index", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - DwarfTUIndexSection = Ctx->getCOFFSection( - ".debug_tu_index", - COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ, - SectionKind::getMetadata()); - 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()); - - GFIDsSection = Ctx->getCOFFSection(".gfids$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::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()); - DwarfStrSection = - Ctx->getWasmSection(".debug_str", SectionKind::getMetadata()); - 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()); - DwarfAddrSection = Ctx->getWasmSection(".debug_addr", SectionKind::getMetadata()); - DwarfCUIndexSection = Ctx->getWasmSection(".debug_cu_index", SectionKind::getMetadata()); - DwarfTUIndexSection = Ctx->getWasmSection(".debug_tu_index", SectionKind::getMetadata()); - DwarfInfoSection = - Ctx->getWasmSection(".debug_info", SectionKind::getMetadata()); - DwarfFrameSection = Ctx->getWasmSection(".debug_frame", SectionKind::getMetadata()); - DwarfPubNamesSection = Ctx->getWasmSection(".debug_pubnames", SectionKind::getMetadata()); - DwarfPubTypesSection = Ctx->getWasmSection(".debug_pubtypes", 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::InitMCObjectFileInfo(const Triple &TheTriple, bool PIC, - MCContext &ctx, - bool LargeCodeModel) { - PositionIndependent = PIC; - Ctx = &ctx; - - // 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. - - TT = TheTriple; - - switch (TT.getObjectFormat()) { - case Triple::MachO: - Env = IsMachO; - initMachOMCObjectFileInfo(TT); - break; - case Triple::COFF: - if (!TT.isOSWindows()) - report_fatal_error( - "Cannot initialize MC for non-Windows COFF object files."); - - Env = IsCOFF; - initCOFFMCObjectFileInfo(TT); - break; - case Triple::ELF: - Env = IsELF; - initELFMCObjectFileInfo(TT, LargeCodeModel); - break; - case Triple::Wasm: - Env = IsWasm; - initWasmMCObjectFileInfo(TT); - break; - case Triple::UnknownObjectFormat: - report_fatal_error("Cannot initialize MC for unknown object file format."); - break; - } -} - -MCSection *MCObjectFileInfo::getDwarfComdatSection(const char *Name, - uint64_t Hash) const { - switch (TT.getObjectFormat()) { - case Triple::ELF: - return Ctx->getELFSection(Name, ELF::SHT_PROGBITS, ELF::SHF_GROUP, 0, - utostr(Hash)); - case Triple::MachO: - case Triple::COFF: - case Triple::Wasm: - 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 (Env != IsELF) - 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; - } - - const MCSymbol *Link = TextSec.getBeginSymbol(); - auto It = StackSizesUniquing.insert({Link, StackSizesUniquing.size()}); - unsigned UniqueID = It.first->second; - - return Ctx->getELFSection(".stack_sizes", ELF::SHT_PROGBITS, Flags, 0, - GroupName, UniqueID, cast<MCSymbolELF>(Link)); -} |