diff options
Diffstat (limited to 'contrib/llvm/lib/MC/MCObjectFileInfo.cpp')
| -rw-r--r-- | contrib/llvm/lib/MC/MCObjectFileInfo.cpp | 230 |
1 files changed, 126 insertions, 104 deletions
diff --git a/contrib/llvm/lib/MC/MCObjectFileInfo.cpp b/contrib/llvm/lib/MC/MCObjectFileInfo.cpp index 576827a..028f2e9 100644 --- a/contrib/llvm/lib/MC/MCObjectFileInfo.cpp +++ b/contrib/llvm/lib/MC/MCObjectFileInfo.cpp @@ -16,6 +16,8 @@ #include "llvm/MC/MCSectionCOFF.h" #include "llvm/MC/MCSectionELF.h" #include "llvm/MC/MCSectionMachO.h" +#include "llvm/Support/COFF.h" + using namespace llvm; static bool useCompactUnwind(const Triple &T) { @@ -27,6 +29,10 @@ static bool useCompactUnwind(const Triple &T) { if (T.getArch() == Triple::aarch64) return true; + // armv7k always has it. + if (T.isWatchOS()) + return true; + // Use it on newer version of OS X. if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6)) return true; @@ -43,9 +49,18 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(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.isWatchOS()) + OmitDwarfIfHaveCompactUnwind = true; + PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; LSDAEncoding = FDECFIEncoding = dwarf::DW_EH_PE_pcrel; @@ -61,16 +76,15 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(Triple T) { MachO::S_ATTR_PURE_INSTRUCTIONS, SectionKind::getText()); DataSection // .data - = Ctx->getMachOSection("__DATA", "__data", 0, - SectionKind::getDataRel()); + = 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::getDataRel()); + = Ctx->getMachOSection("__DATA", "__thread_data", + MachO::S_THREAD_LOCAL_REGULAR, + SectionKind::getData()); TLSBSSSection // .tbss = Ctx->getMachOSection("__DATA", "__thread_bss", MachO::S_THREAD_LOCAL_ZEROFILL, @@ -78,14 +92,13 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(Triple T) { // TODO: Verify datarel below. TLSTLVSection // .tlv - = Ctx->getMachOSection("__DATA", "__thread_vars", - MachO::S_THREAD_LOCAL_VARIABLES, - SectionKind::getDataRel()); + = 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::getDataRel()); + TLSThreadInitSection = Ctx->getMachOSection( + "__DATA", "__thread_init", MachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS, + SectionKind::getData()); CStringSection // .cstring = Ctx->getMachOSection("__TEXT", "__cstring", @@ -112,22 +125,35 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(Triple T) { = Ctx->getMachOSection("__TEXT", "__const", 0, SectionKind::getReadOnly()); - 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()); + // If the target is not powerpc, map the coal sections to the non-coal + // sections. + // + // "__TEXT/__textcoal_nt" => section "__TEXT/__text" + // "__TEXT/__const_coal" => section "__TEXT/__const" + // "__DATA/__datacoal_nt" => section "__DATA/__data" + Triple::ArchType ArchTy = T.getArch(); + + if (ArchTy == Triple::ppc || ArchTy == Triple::ppc64) { + TextCoalSection + = Ctx->getMachOSection("__TEXT", "__textcoal_nt", + MachO::S_COALESCED | + MachO::S_ATTR_PURE_INSTRUCTIONS, + SectionKind::getText()); + ConstTextCoalSection + = Ctx->getMachOSection("__TEXT", "__const_coal", + MachO::S_COALESCED, + SectionKind::getReadOnly()); + DataCoalSection = Ctx->getMachOSection( + "__DATA", "__datacoal_nt", MachO::S_COALESCED, SectionKind::getData()); + } else { + TextCoalSection = TextSection; + ConstTextCoalSection = ReadOnlySection; + DataCoalSection = DataSection; + } + ConstDataSection // .const_data = Ctx->getMachOSection("__DATA", "__const", 0, SectionKind::getReadOnlyWithRel()); - DataCoalSection - = Ctx->getMachOSection("__DATA","__datacoal_nt", - MachO::S_COALESCED, - SectionKind::getDataRel()); DataCommonSection = Ctx->getMachOSection("__DATA","__common", MachO::S_ZEROFILL, @@ -147,21 +173,17 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(Triple T) { SectionKind::getMetadata()); if (RelocM == Reloc::Static) { - StaticCtorSection - = Ctx->getMachOSection("__TEXT", "__constructor", 0, - SectionKind::getDataRel()); - StaticDtorSection - = Ctx->getMachOSection("__TEXT", "__destructor", 0, - SectionKind::getDataRel()); + StaticCtorSection = Ctx->getMachOSection("__TEXT", "__constructor", 0, + SectionKind::getData()); + StaticDtorSection = Ctx->getMachOSection("__TEXT", "__destructor", 0, + SectionKind::getData()); } else { - StaticCtorSection - = Ctx->getMachOSection("__DATA", "__mod_init_func", - MachO::S_MOD_INIT_FUNC_POINTERS, - SectionKind::getDataRel()); - StaticDtorSection - = Ctx->getMachOSection("__DATA", "__mod_term_func", - MachO::S_MOD_TERM_FUNC_POINTERS, - SectionKind::getDataRel()); + StaticCtorSection = Ctx->getMachOSection("__DATA", "__mod_init_func", + MachO::S_MOD_INIT_FUNC_POINTERS, + SectionKind::getData()); + StaticDtorSection = Ctx->getMachOSection("__DATA", "__mod_term_func", + MachO::S_MOD_TERM_FUNC_POINTERS, + SectionKind::getData()); } // Exception Handling. @@ -176,9 +198,11 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(Triple T) { SectionKind::getReadOnly()); if (T.getArch() == Triple::x86_64 || T.getArch() == Triple::x86) - CompactUnwindDwarfEHFrameOnly = 0x04000000; + CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_X86_64_MODE_DWARF else if (T.getArch() == Triple::aarch64) - CompactUnwindDwarfEHFrameOnly = 0x03000000; + CompactUnwindDwarfEHFrameOnly = 0x03000000; // UNWIND_ARM64_MODE_DWARF + else if (T.getArch() == Triple::arm || T.getArch() == Triple::thumb) + CompactUnwindDwarfEHFrameOnly = 0x04000000; // UNWIND_ARM_MODE_DWARF } // Debug Information. @@ -235,6 +259,12 @@ void MCObjectFileInfo::initMachOMCObjectFileInfo(Triple T) { 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()); @@ -258,7 +288,6 @@ void MCObjectFileInfo::initELFMCObjectFileInfo(Triple T) { FDECFIEncoding = dwarf::DW_EH_PE_pcrel | ((CMModel == CodeModel::Large) ? dwarf::DW_EH_PE_sdata8 : dwarf::DW_EH_PE_sdata4); - break; default: FDECFIEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4; @@ -391,17 +420,15 @@ void MCObjectFileInfo::initELFMCObjectFileInfo(Triple T) { 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. - EHSectionType = ELF::SHT_PROGBITS; - EHSectionFlags = ELF::SHF_ALLOC; - if (T.isOSSolaris()) { - if (T.getArch() == Triple::x86_64) - EHSectionType = ELF::SHT_X86_64_UNWIND; - else - EHSectionFlags |= ELF::SHF_WRITE; - } - + 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, @@ -423,18 +450,9 @@ void MCObjectFileInfo::initELFMCObjectFileInfo(Triple T) { TLSBSSSection = Ctx->getELFSection( ".tbss", ELF::SHT_NOBITS, ELF::SHF_ALLOC | ELF::SHF_TLS | ELF::SHF_WRITE); - DataRelSection = Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC | ELF::SHF_WRITE); - - DataRelLocalSection = Ctx->getELFSection(".data.rel.local", ELF::SHT_PROGBITS, - ELF::SHF_ALLOC | ELF::SHF_WRITE); - DataRelROSection = Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS, ELF::SHF_ALLOC | ELF::SHF_WRITE); - DataRelROLocalSection = Ctx->getELFSection( - ".data.rel.ro.local", ELF::SHT_PROGBITS, ELF::SHF_ALLOC | ELF::SHF_WRITE); - MergeableConst4Section = Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS, ELF::SHF_ALLOC | ELF::SHF_MERGE, 4, ""); @@ -519,14 +537,28 @@ void MCObjectFileInfo::initELFMCObjectFileInfo(Triple T) { DwarfAddrSection = Ctx->getELFSection(".debug_addr", ELF::SHT_PROGBITS, 0, "addr_sec"); + // DWP Sections + DwarfCUIndexSection = + Ctx->getELFSection(".debug_cu_index", ELF::SHT_PROGBITS, 0); + DwarfTUIndexSection = + Ctx->getELFSection(".debug_tu_index", ELF::SHT_PROGBITS, 0); + StackMapSection = Ctx->getELFSection(".llvm_stackmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC); FaultMapSection = Ctx->getELFSection(".llvm_faultmaps", ELF::SHT_PROGBITS, ELF::SHF_ALLOC); + + EHFrameSection = + Ctx->getELFSection(".eh_frame", EHSectionType, EHSectionFlags); } void MCObjectFileInfo::initCOFFMCObjectFileInfo(Triple T) { + EHFrameSection = Ctx->getCOFFSection( + ".eh_frame", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | + COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE, + SectionKind::getData()); + bool IsWoA = T.getArch() == Triple::arm || T.getArch() == Triple::thumb; CommDirectiveSupportsAlignment = true; @@ -545,7 +577,7 @@ void MCObjectFileInfo::initCOFFMCObjectFileInfo(Triple T) { DataSection = Ctx->getCOFFSection( ".data", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); + SectionKind::getData()); ReadOnlySection = Ctx->getCOFFSection( ".rdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ, SectionKind::getReadOnly()); @@ -563,21 +595,20 @@ void MCObjectFileInfo::initCOFFMCObjectFileInfo(Triple T) { StaticCtorSection = Ctx->getCOFFSection( ".ctors", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); + SectionKind::getData()); StaticDtorSection = Ctx->getCOFFSection( ".dtors", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); + SectionKind::getData()); } // 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. - assert(T.isOSWindows() && "Windows is the only supported COFF target"); if (T.getArch() == Triple::x86_64) { // On Windows 64 with SEH, the LSDA is emitted into the .xdata section - LSDASection = 0; + LSDASection = nullptr; } else { LSDASection = Ctx->getCOFFSection(".gcc_except_table", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | @@ -693,6 +724,16 @@ void MCObjectFileInfo::initCOFFMCObjectFileInfo(Triple T) { COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ, SectionKind::getMetadata(), "addr_sec"); + DwarfCUIndexSection = Ctx->getCOFFSection( + ".debug_cu_index", + COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | + COFF::IMAGE_SCN_MEM_READ, + SectionKind::getMetadata()); + DwarfTUIndexSection = Ctx->getCOFFSection( + ".debug_tu_index", + COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | + COFF::IMAGE_SCN_MEM_READ, + SectionKind::getMetadata()); DwarfAccelNamesSection = Ctx->getCOFFSection( ".apple_names", COFF::IMAGE_SCN_MEM_DISCARDABLE | COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | @@ -720,11 +761,11 @@ void MCObjectFileInfo::initCOFFMCObjectFileInfo(Triple T) { PDataSection = Ctx->getCOFFSection( ".pdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ, - SectionKind::getDataRel()); + SectionKind::getData()); XDataSection = Ctx->getCOFFSection( ".xdata", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ, - SectionKind::getDataRel()); + SectionKind::getData()); SXDataSection = Ctx->getCOFFSection(".sxdata", COFF::IMAGE_SCN_LNK_INFO, SectionKind::getMetadata()); @@ -732,12 +773,12 @@ void MCObjectFileInfo::initCOFFMCObjectFileInfo(Triple T) { TLSDataSection = Ctx->getCOFFSection( ".tls$", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ | COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); - + SectionKind::getData()); + StackMapSection = Ctx->getCOFFSection(".llvm_stackmaps", COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | COFF::IMAGE_SCN_MEM_READ, - SectionKind::getReadOnly()); + SectionKind::getReadOnly()); } void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, @@ -752,6 +793,7 @@ void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, CommDirectiveSupportsAlignment = true; SupportsWeakOmittedEHFrame = true; SupportsCompactUnwindWithoutEHFrame = false; + OmitDwarfIfHaveCompactUnwind = false; PersonalityEncoding = LSDAEncoding = FDECFIEncoding = TTypeEncoding = dwarf::DW_EH_PE_absptr; @@ -767,25 +809,26 @@ void MCObjectFileInfo::InitMCObjectFileInfo(const Triple &TheTriple, TT = TheTriple; - Triple::ArchType Arch = TT.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::aarch64 || - Arch == Triple::ppc || Arch == Triple::ppc64 || - Arch == Triple::UnknownArch) && - TT.isOSBinFormatMachO()) { + switch (TT.getObjectFormat()) { + case Triple::MachO: Env = IsMachO; initMachOMCObjectFileInfo(TT); - } else if ((Arch == Triple::x86 || Arch == Triple::x86_64 || - Arch == Triple::arm || Arch == Triple::thumb) && - (TT.isOSWindows() && TT.getObjectFormat() == Triple::COFF)) { + break; + case Triple::COFF: + if (!TT.isOSWindows()) + report_fatal_error( + "Cannot initialize MC for non-Windows COFF object files."); + Env = IsCOFF; initCOFFMCObjectFileInfo(TT); - } else { + break; + case Triple::ELF: Env = IsELF; initELFMCObjectFileInfo(TT); + break; + case Triple::UnknownObjectFormat: + report_fatal_error("Cannot initialize MC for unknown object file format."); + break; } } @@ -799,24 +842,3 @@ MCSection *MCObjectFileInfo::getDwarfTypesSection(uint64_t Hash) const { return Ctx->getELFSection(".debug_types", ELF::SHT_PROGBITS, ELF::SHF_GROUP, 0, utostr(Hash)); } - -void MCObjectFileInfo::InitEHFrameSection() { - if (Env == IsMachO) - 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()); - else if (Env == IsELF) - EHFrameSection = - Ctx->getELFSection(".eh_frame", EHSectionType, EHSectionFlags); - else - EHFrameSection = - Ctx->getCOFFSection(".eh_frame", - COFF::IMAGE_SCN_CNT_INITIALIZED_DATA | - COFF::IMAGE_SCN_MEM_READ | - COFF::IMAGE_SCN_MEM_WRITE, - SectionKind::getDataRel()); -} |
