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https://github.com/c64scene-ar/llvm-6502.git
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Untangle a snarl that I discovered when updating the mangler,
starting in getCurrentFunctionEHName. Among other problems, we would try to privative a "foo.eh" label, but end up emitting the label as _Lfoo.eh instead of L_foo.eh on darwin. This is really bad, and the linker has always tolerated these labels existing. For now, just emit them as _foo.eh. This patch also fixes problems with ".eh" labels on unnamed functions and eliminates two strangely defined TargetAsmInfo hooks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76231 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -170,11 +170,9 @@ namespace llvm {
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/// Should be overridden if an indirect reference should be used.
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virtual void EmitExternalGlobal(const GlobalVariable *GV);
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/// getCurrentFunctionEHName - Called to return (and cache) the
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/// CurrentFnEHName.
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/// getCurrentFunctionEHName - Called to return the CurrentFnEHName.
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///
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const std::string &getCurrentFunctionEHName(const MachineFunction *MF,
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std::string &FuncEHName) const;
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std::string getCurrentFunctionEHName(const MachineFunction *MF) const;
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protected:
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/// getAnalysisUsage - Record analysis usage.
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@ -480,9 +480,9 @@ namespace llvm {
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/// encode inline subroutine information.
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bool DwarfUsesInlineInfoSection; // Defaults to false.
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/// NonLocalEHFrameLabel - If set, the EH_frame label needs to be non-local.
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///
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bool NonLocalEHFrameLabel; // Defaults to false.
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/// Is_EHSymbolPrivate - If set, the "_foo.eh" is made private so that it
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/// doesn't show up in the symbol table of the object file.
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bool Is_EHSymbolPrivate; // Defaults to true.
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/// GlobalEHDirective - This is the directive used to make exception frame
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/// tables globally visible.
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@ -714,12 +714,6 @@ namespace llvm {
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const char *getPrivateGlobalPrefix() const {
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return PrivateGlobalPrefix;
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}
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/// EHGlobalPrefix - Prefix for EH_frame and the .eh symbols.
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/// This is normally PrivateGlobalPrefix, but some targets want
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/// these symbols to be visible.
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virtual const char *getEHGlobalPrefix() const {
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return PrivateGlobalPrefix;
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}
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const char *getLessPrivateGlobalPrefix() const {
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return LessPrivateGlobalPrefix;
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}
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@ -876,8 +870,8 @@ namespace llvm {
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bool doesDwarfUsesInlineInfoSection() const {
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return DwarfUsesInlineInfoSection;
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}
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bool doesRequireNonLocalEHFrameLabel() const {
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return NonLocalEHFrameLabel;
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bool is_EHSymbolPrivate() const {
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return Is_EHSymbolPrivate;
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}
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const char *getGlobalEHDirective() const {
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return GlobalEHDirective;
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@ -264,17 +264,11 @@ bool AsmPrinter::doFinalization(Module &M) {
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return false;
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}
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const std::string &
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AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF,
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std::string &Name) const {
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std::string
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AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) const {
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assert(MF && "No machine function?");
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Name = MF->getFunction()->getName();
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if (Name.empty())
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Name = Mang->getMangledName(MF->getFunction());
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// FIXME: THIS SEEMS REALLY WRONG, it will get two prefixes.
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Name = Mang->makeNameProper(TAI->getEHGlobalPrefix() + Name + ".eh");
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return Name;
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return Mang->getMangledName(MF->getFunction(), ".eh",
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TAI->is_EHSymbolPrivate());
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}
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void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
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@ -57,8 +57,8 @@ void DwarfException::EmitCommonEHFrame(const Function *Personality,
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// Begin eh frame section.
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Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
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if (!TAI->doesRequireNonLocalEHFrameLabel())
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O << TAI->getEHGlobalPrefix();
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if (TAI->is_EHSymbolPrivate())
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O << TAI->getPrivateGlobalPrefix();
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O << "EH_frame" << Index << ":\n";
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EmitLabel("section_eh_frame", Index);
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@ -194,7 +194,8 @@ void DwarfException::EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
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EmitLabel("eh_frame_begin", EHFrameInfo.Number);
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if (TAI->doesRequireNonLocalEHFrameLabel()) {
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if (!TAI->is_EHSymbolPrivate()) {
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// FIXME: HOW ARE THESE TWO ARMS DIFFERENT?? EH_frame vs eh_frame_common?
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PrintRelDirective(true, true);
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PrintLabelName("eh_frame_begin", EHFrameInfo.Number);
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@ -690,9 +691,8 @@ void DwarfException::EndFunction() {
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EmitExceptionTable();
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// Save EH frame information
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std::string Name;
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EHFrames.push_back(
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FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF, Name),
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FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF),
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SubprogramCount,
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MMI->getPersonalityIndex(),
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MF->getFrameInfo()->hasCalls(),
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@ -86,6 +86,11 @@ DarwinTargetAsmInfo::DarwinTargetAsmInfo(const TargetMachine &TM)
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StaticDtorsSection = ".mod_term_func";
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}
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// _foo.eh symbols are currently always exported so that the linker knows
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// about them. This may not strictly be necessary on 10.6 and later, but it
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// doesn't hurt anything.
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Is_EHSymbolPrivate = false;
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DwarfAbbrevSection = ".section __DWARF,__debug_abbrev,regular,debug";
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DwarfInfoSection = ".section __DWARF,__debug_info,regular,debug";
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DwarfLineSection = ".section __DWARF,__debug_line,regular,debug";
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@ -106,7 +106,7 @@ TargetAsmInfo::TargetAsmInfo(const TargetMachine &tm)
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SupportsExceptionHandling = false;
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DwarfRequiresFrameSection = true;
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DwarfUsesInlineInfoSection = false;
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NonLocalEHFrameLabel = false;
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Is_EHSymbolPrivate = true;
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GlobalEHDirective = 0;
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SupportsWeakOmittedEHFrame = true;
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DwarfSectionOffsetDirective = 0;
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@ -64,8 +64,7 @@ X86DarwinTargetAsmInfo::X86DarwinTargetAsmInfo(const X86TargetMachine &TM):
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// Leopard and above support aligned common symbols.
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COMMDirectiveTakesAlignment = (Subtarget->getDarwinVers() >= 9);
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HasDotTypeDotSizeDirective = false;
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NonLocalEHFrameLabel = true;
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if (is64Bit) {
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PersonalityPrefix = "";
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PersonalitySuffix = "+4@GOTPCREL";
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