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https://github.com/c64scene-ar/llvm-6502.git
synced 2025-06-12 13:38:21 +00:00
Make the big switch: Change MCSectionMachO to represent a section *semantically*
instead of syntactically as a string. This means that it keeps track of the segment, section, flags, etc directly and asmprints them in the right format. This also includes parsing and validation support for llvm-mc and "attribute(section)", so we should now start getting errors about invalid section attributes from the compiler instead of the assembler on darwin. Still todo: 1) Uniquing of darwin mcsections 2) Move all the Darwin stuff out to MCSectionMachO.[cpp|h] 3) there are a few FIXMEs, for example what is the syntax to get the S_GB_ZEROFILL segment type? git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@78547 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
@ -510,118 +510,176 @@ getSectionForConstant(SectionKind Kind) const {
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const MCSection *TargetLoweringObjectFileMachO::
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getMachOSection(const char *Name, bool isDirective, SectionKind Kind) const {
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if (MCSection *S = getContext().GetSection(Name))
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return S;
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return MCSectionMachO::Create(Name, isDirective, Kind, getContext());
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getMachOSection(StringRef Segment, StringRef Section,
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unsigned TypeAndAttributes,
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unsigned Reserved2, SectionKind Kind) const {
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// FIXME: UNIQUE HERE.
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//if (MCSection *S = getContext().GetSection(Name))
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// return S;
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return MCSectionMachO::Create(Segment, Section, TypeAndAttributes, Reserved2,
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Kind, getContext());
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}
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void TargetLoweringObjectFileMachO::Initialize(MCContext &Ctx,
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const TargetMachine &TM) {
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TargetLoweringObjectFile::Initialize(Ctx, TM);
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TextSection = getMachOSection("\t.text", true, SectionKind::getText());
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DataSection = getMachOSection("\t.data", true, SectionKind::getDataRel());
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CStringSection = getMachOSection("\t.cstring", true,
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SectionKind::getMergeable1ByteCString());
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UStringSection = getMachOSection("__TEXT,__ustring", false,
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SectionKind::getMergeable2ByteCString());
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FourByteConstantSection = getMachOSection("\t.literal4\n", true,
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SectionKind::getMergeableConst4());
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EightByteConstantSection = getMachOSection("\t.literal8\n", true,
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SectionKind::getMergeableConst8());
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TextSection // .text
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= 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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= getMachOSection("__DATA", "__data", 0, SectionKind::getDataRel());
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CStringSection // .cstring
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= getMachOSection("__TEXT", "__cstring", MCSectionMachO::S_CSTRING_LITERALS,
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SectionKind::getMergeable1ByteCString());
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UStringSection
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= getMachOSection("__TEXT","__ustring", 0,
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SectionKind::getMergeable2ByteCString());
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FourByteConstantSection // .literal4
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= getMachOSection("__TEXT", "__literal4", MCSectionMachO::S_4BYTE_LITERALS,
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SectionKind::getMergeableConst4());
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EightByteConstantSection // .literal8
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= getMachOSection("__TEXT", "__literal8", 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 (TM.getRelocationModel() != Reloc::Static &&
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TM.getTargetData()->getPointerSize() == 32)
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SixteenByteConstantSection =
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getMachOSection("\t.literal16\n", true,
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SixteenByteConstantSection = // .literal16
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getMachOSection("__TEXT", "__literal16",MCSectionMachO::S_16BYTE_LITERALS,
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SectionKind::getMergeableConst16());
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else
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SixteenByteConstantSection = 0;
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ReadOnlySection = getMachOSection("\t.const", true,
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SectionKind::getReadOnly());
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ReadOnlySection // .const
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= getMachOSection("__TEXT", "__const", 0, SectionKind::getReadOnly());
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TextCoalSection =
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getMachOSection("\t__TEXT,__textcoal_nt,coalesced,pure_instructions",
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false, SectionKind::getText());
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ConstTextCoalSection = getMachOSection("\t__TEXT,__const_coal,coalesced",
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false, SectionKind::getText());
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ConstDataCoalSection = getMachOSection("\t__DATA,__const_coal,coalesced",
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false, SectionKind::getText());
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ConstDataSection = getMachOSection("\t.const_data", true,
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SectionKind::getReadOnlyWithRel());
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DataCoalSection = getMachOSection("\t__DATA,__datacoal_nt,coalesced",
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false, SectionKind::getDataRel());
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TextCoalSection
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= 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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= getMachOSection("__TEXT", "__const_coal", MCSectionMachO::S_COALESCED,
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SectionKind::getText());
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ConstDataCoalSection
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= getMachOSection("__DATA","__const_coal", MCSectionMachO::S_COALESCED,
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SectionKind::getText());
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ConstDataSection // .const_data
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= getMachOSection("__DATA", "__const", 0,
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SectionKind::getReadOnlyWithRel());
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DataCoalSection
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= getMachOSection("__DATA","__datacoal_nt", MCSectionMachO::S_COALESCED,
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SectionKind::getDataRel());
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if (TM.getRelocationModel() == Reloc::Static) {
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StaticCtorSection =
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getMachOSection(".constructor", true, SectionKind::getDataRel());
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StaticDtorSection =
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getMachOSection(".destructor", true, SectionKind::getDataRel());
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StaticCtorSection
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= getMachOSection("__TEXT", "__constructor", 0,SectionKind::getDataRel());
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StaticDtorSection
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= getMachOSection("__TEXT", "__destructor", 0, SectionKind::getDataRel());
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} else {
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StaticCtorSection =
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getMachOSection(".mod_init_func", true, SectionKind::getDataRel());
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StaticDtorSection =
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getMachOSection(".mod_term_func", true, SectionKind::getDataRel());
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StaticCtorSection
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= 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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= 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 = getMachOSection("__DATA,__gcc_except_tab", false,
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LSDASection = getMachOSection("__DATA", "__gcc_except_tab", 0,
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SectionKind::getDataRel());
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EHFrameSection =
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getMachOSection("__TEXT,__eh_frame,coalesced,no_toc+strip_static_syms"
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"+live_support", false, SectionKind::getReadOnly());
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getMachOSection("__TEXT", "__eh_frame",
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MCSectionMachO::S_COALESCED |
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MCSectionMachO::S_ATTR_NO_TOC |
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MCSectionMachO::S_ATTR_STRIP_STATIC_SYMS |
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MCSectionMachO::S_ATTR_LIVE_SUPPORT,
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SectionKind::getReadOnly());
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// Debug Information.
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// FIXME: Don't use 'directive' syntax: need flags for debug/regular??
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// FIXME: Need __DWARF segment.
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DwarfAbbrevSection =
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getMachOSection(".section __DWARF,__debug_abbrev,regular,debug", true,
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getMachOSection("__DWARF", "__debug_abbrev", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfInfoSection =
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getMachOSection(".section __DWARF,__debug_info,regular,debug", true,
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getMachOSection("__DWARF", "__debug_info", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfLineSection =
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getMachOSection(".section __DWARF,__debug_line,regular,debug", true,
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getMachOSection("__DWARF", "__debug_line", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfFrameSection =
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getMachOSection(".section __DWARF,__debug_frame,regular,debug", true,
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getMachOSection("__DWARF", "__debug_frame", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfPubNamesSection =
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getMachOSection(".section __DWARF,__debug_pubnames,regular,debug", true,
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getMachOSection("__DWARF", "__debug_pubnames", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfPubTypesSection =
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getMachOSection(".section __DWARF,__debug_pubtypes,regular,debug", true,
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getMachOSection("__DWARF", "__debug_pubtypes", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfStrSection =
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getMachOSection(".section __DWARF,__debug_str,regular,debug", true,
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getMachOSection("__DWARF", "__debug_str", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfLocSection =
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getMachOSection(".section __DWARF,__debug_loc,regular,debug", true,
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getMachOSection("__DWARF", "__debug_loc", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfARangesSection =
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getMachOSection(".section __DWARF,__debug_aranges,regular,debug", true,
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getMachOSection("__DWARF", "__debug_aranges", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfRangesSection =
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getMachOSection(".section __DWARF,__debug_ranges,regular,debug", true,
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getMachOSection("__DWARF", "__debug_ranges", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfMacroInfoSection =
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getMachOSection(".section __DWARF,__debug_macinfo,regular,debug", true,
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getMachOSection("__DWARF", "__debug_macinfo", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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DwarfDebugInlineSection =
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getMachOSection(".section __DWARF,__debug_inlined,regular,debug", true,
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getMachOSection("__DWARF", "__debug_inlined", MCSectionMachO::S_ATTR_DEBUG,
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SectionKind::getMetadata());
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}
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/// getLazySymbolPointerSection - Return the section corresponding to
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/// the .lazy_symbol_pointer directive.
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const MCSection *TargetLoweringObjectFileMachO::
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getLazySymbolPointerSection() const {
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return getMachOSection("__DATA", "__la_symbol_ptr",
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MCSectionMachO::S_LAZY_SYMBOL_POINTERS,
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SectionKind::getMetadata());
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}
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/// getNonLazySymbolPointerSection - Return the section corresponding to
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/// the .non_lazy_symbol_pointer directive.
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const MCSection *TargetLoweringObjectFileMachO::
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getNonLazySymbolPointerSection() const {
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return 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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}
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const MCSection *TargetLoweringObjectFileMachO::
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getExplicitSectionGlobal(const GlobalValue *GV, SectionKind Kind,
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Mangler *Mang, const TargetMachine &TM) const {
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return getMachOSection(GV->getSection().c_str(), false, Kind);
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// Parse the section specifier and create it if valid.
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StringRef Segment, Section;
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unsigned TAA, StubSize;
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std::string ErrorCode =
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MCSectionMachO::ParseSectionSpecifier(GV->getSection(), Segment, Section,
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TAA, StubSize);
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if (ErrorCode.empty())
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return getMachOSection(Segment, Section, TAA, StubSize, Kind);
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// If invalid, report the error with llvm_report_error.
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llvm_report_error("Global variable '" + GV->getNameStr() +
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"' has an invalid section specifier '" + GV->getSection() +
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"': " + ErrorCode + ".");
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// Fall back to dropping it into the data section.
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return DataSection;
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}
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const MCSection *TargetLoweringObjectFileMachO::
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