Add MCObjectFileInfo and sink the MCSections initialization code from
TargetLoweringObjectFileImpl down to MCObjectFileInfo.
TargetAsmInfo is done to one last method. It's *almost* gone!
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135569 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCObjectFileInfo.cpp b/lib/MC/MCObjectFileInfo.cpp
new file mode 100644
index 0000000..cdf225a
--- /dev/null
+++ b/lib/MC/MCObjectFileInfo.cpp
@@ -0,0 +1,500 @@
+//===-- MObjectFileInfo.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/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/ADT/Triple.h"
+using namespace llvm;
+
+void MCObjectFileInfo::InitMachOMCObjectFileInfo(Triple T) {
+ // MachO
+ IsFunctionEHFrameSymbolPrivate = false;
+ SupportsWeakOmittedEHFrame = false;
+
+ // .comm doesn't support alignment before Leopard.
+ if (T.isMacOSX() && T.isMacOSXVersionLT(10, 5))
+ CommDirectiveSupportsAlignment = false;
+
+ TextSection // .text
+ = Ctx->getMachOSection("__TEXT", "__text",
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ SectionKind::getText());
+ DataSection // .data
+ = Ctx->getMachOSection("__DATA", "__data", 0,
+ SectionKind::getDataRel());
+
+ TLSDataSection // .tdata
+ = Ctx->getMachOSection("__DATA", "__thread_data",
+ MCSectionMachO::S_THREAD_LOCAL_REGULAR,
+ SectionKind::getDataRel());
+ TLSBSSSection // .tbss
+ = Ctx->getMachOSection("__DATA", "__thread_bss",
+ MCSectionMachO::S_THREAD_LOCAL_ZEROFILL,
+ SectionKind::getThreadBSS());
+
+ // TODO: Verify datarel below.
+ TLSTLVSection // .tlv
+ = Ctx->getMachOSection("__DATA", "__thread_vars",
+ MCSectionMachO::S_THREAD_LOCAL_VARIABLES,
+ SectionKind::getDataRel());
+
+ TLSThreadInitSection
+ = Ctx->getMachOSection("__DATA", "__thread_init",
+ MCSectionMachO::S_THREAD_LOCAL_INIT_FUNCTION_POINTERS,
+ SectionKind::getDataRel());
+
+ CStringSection // .cstring
+ = Ctx->getMachOSection("__TEXT", "__cstring",
+ MCSectionMachO::S_CSTRING_LITERALS,
+ SectionKind::getMergeable1ByteCString());
+ UStringSection
+ = Ctx->getMachOSection("__TEXT","__ustring", 0,
+ SectionKind::getMergeable2ByteCString());
+ FourByteConstantSection // .literal4
+ = Ctx->getMachOSection("__TEXT", "__literal4",
+ MCSectionMachO::S_4BYTE_LITERALS,
+ SectionKind::getMergeableConst4());
+ EightByteConstantSection // .literal8
+ = Ctx->getMachOSection("__TEXT", "__literal8",
+ MCSectionMachO::S_8BYTE_LITERALS,
+ SectionKind::getMergeableConst8());
+
+ // ld_classic doesn't support .literal16 in 32-bit mode, and ld64 falls back
+ // to using it in -static mode.
+ SixteenByteConstantSection = 0;
+ if (RelocM != Reloc::Static &&
+ T.getArch() != Triple::x86_64 && T.getArch() != Triple::ppc64)
+ SixteenByteConstantSection = // .literal16
+ Ctx->getMachOSection("__TEXT", "__literal16",
+ MCSectionMachO::S_16BYTE_LITERALS,
+ SectionKind::getMergeableConst16());
+
+ ReadOnlySection // .const
+ = Ctx->getMachOSection("__TEXT", "__const", 0,
+ SectionKind::getReadOnly());
+
+ TextCoalSection
+ = Ctx->getMachOSection("__TEXT", "__textcoal_nt",
+ MCSectionMachO::S_COALESCED |
+ MCSectionMachO::S_ATTR_PURE_INSTRUCTIONS,
+ SectionKind::getText());
+ ConstTextCoalSection
+ = Ctx->getMachOSection("__TEXT", "__const_coal",
+ MCSectionMachO::S_COALESCED,
+ SectionKind::getReadOnly());
+ ConstDataSection // .const_data
+ = Ctx->getMachOSection("__DATA", "__const", 0,
+ SectionKind::getReadOnlyWithRel());
+ DataCoalSection
+ = Ctx->getMachOSection("__DATA","__datacoal_nt",
+ MCSectionMachO::S_COALESCED,
+ SectionKind::getDataRel());
+ DataCommonSection
+ = Ctx->getMachOSection("__DATA","__common",
+ MCSectionMachO::S_ZEROFILL,
+ SectionKind::getBSS());
+ DataBSSSection
+ = Ctx->getMachOSection("__DATA","__bss", MCSectionMachO::S_ZEROFILL,
+ SectionKind::getBSS());
+
+
+ LazySymbolPointerSection
+ = Ctx->getMachOSection("__DATA", "__la_symbol_ptr",
+ MCSectionMachO::S_LAZY_SYMBOL_POINTERS,
+ SectionKind::getMetadata());
+ NonLazySymbolPointerSection
+ = Ctx->getMachOSection("__DATA", "__nl_symbol_ptr",
+ MCSectionMachO::S_NON_LAZY_SYMBOL_POINTERS,
+ SectionKind::getMetadata());
+
+ if (RelocM == Reloc::Static) {
+ StaticCtorSection
+ = Ctx->getMachOSection("__TEXT", "__constructor", 0,
+ SectionKind::getDataRel());
+ StaticDtorSection
+ = Ctx->getMachOSection("__TEXT", "__destructor", 0,
+ SectionKind::getDataRel());
+ } else {
+ StaticCtorSection
+ = Ctx->getMachOSection("__DATA", "__mod_init_func",
+ MCSectionMachO::S_MOD_INIT_FUNC_POINTERS,
+ SectionKind::getDataRel());
+ StaticDtorSection
+ = Ctx->getMachOSection("__DATA", "__mod_term_func",
+ MCSectionMachO::S_MOD_TERM_FUNC_POINTERS,
+ SectionKind::getDataRel());
+ }
+
+ // Exception Handling.
+ LSDASection = Ctx->getMachOSection("__TEXT", "__gcc_except_tab", 0,
+ SectionKind::getReadOnlyWithRel());
+
+ if (T.isMacOSX() && !T.isMacOSXVersionLT(10, 6))
+ CompactUnwindSection =
+ Ctx->getMachOSection("__LD", "__compact_unwind",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getReadOnly());
+
+ // Debug Information.
+ DwarfAbbrevSection =
+ Ctx->getMachOSection("__DWARF", "__debug_abbrev",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfInfoSection =
+ Ctx->getMachOSection("__DWARF", "__debug_info",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfLineSection =
+ Ctx->getMachOSection("__DWARF", "__debug_line",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfFrameSection =
+ Ctx->getMachOSection("__DWARF", "__debug_frame",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfPubNamesSection =
+ Ctx->getMachOSection("__DWARF", "__debug_pubnames",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfPubTypesSection =
+ Ctx->getMachOSection("__DWARF", "__debug_pubtypes",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfStrSection =
+ Ctx->getMachOSection("__DWARF", "__debug_str",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfLocSection =
+ Ctx->getMachOSection("__DWARF", "__debug_loc",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfARangesSection =
+ Ctx->getMachOSection("__DWARF", "__debug_aranges",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfRangesSection =
+ Ctx->getMachOSection("__DWARF", "__debug_ranges",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfMacroInfoSection =
+ Ctx->getMachOSection("__DWARF", "__debug_macinfo",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+ DwarfDebugInlineSection =
+ Ctx->getMachOSection("__DWARF", "__debug_inlined",
+ MCSectionMachO::S_ATTR_DEBUG,
+ SectionKind::getMetadata());
+
+ TLSExtraDataSection = TLSTLVSection;
+}
+
+void MCObjectFileInfo::InitELFMCObjectFileInfo(Triple T) {
+ // ELF
+ BSSSection =
+ Ctx->getELFSection(".bss", ELF::SHT_NOBITS,
+ ELF::SHF_WRITE |ELF::SHF_ALLOC,
+ SectionKind::getBSS());
+
+ TextSection =
+ Ctx->getELFSection(".text", ELF::SHT_PROGBITS,
+ ELF::SHF_EXECINSTR |
+ ELF::SHF_ALLOC,
+ SectionKind::getText());
+
+ DataSection =
+ Ctx->getELFSection(".data", ELF::SHT_PROGBITS,
+ ELF::SHF_WRITE |ELF::SHF_ALLOC,
+ SectionKind::getDataRel());
+
+ ReadOnlySection =
+ Ctx->getELFSection(".rodata", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC,
+ SectionKind::getReadOnly());
+
+ TLSDataSection =
+ Ctx->getELFSection(".tdata", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC | ELF::SHF_TLS |
+ ELF::SHF_WRITE,
+ SectionKind::getThreadData());
+
+ TLSBSSSection =
+ Ctx->getELFSection(".tbss", ELF::SHT_NOBITS,
+ ELF::SHF_ALLOC | ELF::SHF_TLS |
+ ELF::SHF_WRITE,
+ SectionKind::getThreadBSS());
+
+ DataRelSection =
+ Ctx->getELFSection(".data.rel", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |ELF::SHF_WRITE,
+ SectionKind::getDataRel());
+
+ DataRelLocalSection =
+ Ctx->getELFSection(".data.rel.local", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |ELF::SHF_WRITE,
+ SectionKind::getDataRelLocal());
+
+ DataRelROSection =
+ Ctx->getELFSection(".data.rel.ro", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |ELF::SHF_WRITE,
+ SectionKind::getReadOnlyWithRel());
+
+ DataRelROLocalSection =
+ Ctx->getELFSection(".data.rel.ro.local", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |ELF::SHF_WRITE,
+ SectionKind::getReadOnlyWithRelLocal());
+
+ MergeableConst4Section =
+ Ctx->getELFSection(".rodata.cst4", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |ELF::SHF_MERGE,
+ SectionKind::getMergeableConst4());
+
+ MergeableConst8Section =
+ Ctx->getELFSection(".rodata.cst8", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |ELF::SHF_MERGE,
+ SectionKind::getMergeableConst8());
+
+ MergeableConst16Section =
+ Ctx->getELFSection(".rodata.cst16", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |ELF::SHF_MERGE,
+ SectionKind::getMergeableConst16());
+
+ StaticCtorSection =
+ Ctx->getELFSection(".ctors", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |ELF::SHF_WRITE,
+ SectionKind::getDataRel());
+
+ StaticDtorSection =
+ Ctx->getELFSection(".dtors", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC |ELF::SHF_WRITE,
+ SectionKind::getDataRel());
+
+ // 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,
+ 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, 0,
+ SectionKind::getMetadata());
+ 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());
+}
+
+
+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());
+ StaticCtorSection =
+ Ctx->getCOFFSection(".ctors",
+ COFF::IMAGE_SCN_CNT_INITIALIZED_DATA |
+ COFF::IMAGE_SCN_MEM_READ |
+ COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getDataRel());
+ 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 |
+ COFF::IMAGE_SCN_MEM_WRITE,
+ SectionKind::getDataRel());
+
+ XDataSection =
+ Ctx->getCOFFSection(".xdata",
+ 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,
+ MCContext &ctx) {
+ RelocM = relocm;
+ Ctx = &ctx;
+
+ // Common.
+ CommDirectiveSupportsAlignment = true;
+ SupportsWeakOmittedEHFrame = true;
+ IsFunctionEHFrameSymbolPrivate = true;
+
+ 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 (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", ELF::SHT_PROGBITS,
+ ELF::SHF_ALLOC,
+ 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());
+}