| //===- lib/MC/MCSectionELF.cpp - ELF Code Section Representation ----------===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "llvm/MC/MCSectionELF.h" |
| #include "llvm/MC/MCContext.h" |
| #include "llvm/Support/raw_ostream.h" |
| #include "llvm/Target/TargetAsmInfo.h" |
| |
| using namespace llvm; |
| |
| MCSectionELF *MCSectionELF:: |
| Create(const StringRef &Section, unsigned Type, unsigned Flags, |
| SectionKind K, bool hasCrazyBSS, bool isExplicit, MCContext &Ctx) { |
| return new |
| (Ctx) MCSectionELF(Section, Type, Flags, K, hasCrazyBSS, isExplicit); |
| } |
| |
| // ShouldOmitSectionDirective - Decides whether a '.section' directive |
| // should be printed before the section name |
| bool MCSectionELF::ShouldOmitSectionDirective(const char *Name) const { |
| |
| // PPC/Linux doesn't support the .bss directive, it needs .section .bss. |
| // FIXME: Does .section .bss/.data/.text work everywhere?? |
| if ((!HasCrazyBSS && strncmp(Name, ".bss", 4) == 0) || |
| strncmp(Name, ".text", 5) == 0 || |
| strncmp(Name, ".data", 5) == 0) |
| return true; |
| |
| return false; |
| } |
| |
| // ShouldPrintSectionType - Only prints the section type if supported |
| bool MCSectionELF::ShouldPrintSectionType(unsigned Ty) const { |
| |
| if (IsExplicit && !(Ty == SHT_NOBITS || Ty == SHT_PROGBITS)) |
| return false; |
| |
| return true; |
| } |
| |
| void MCSectionELF::PrintSwitchToSection(const TargetAsmInfo &TAI, |
| raw_ostream &OS) const { |
| |
| if (ShouldOmitSectionDirective(SectionName.c_str())) { |
| OS << '\t' << getSectionName() << '\n'; |
| return; |
| } |
| |
| OS << "\t.section\t" << getSectionName(); |
| |
| // Handle the weird solaris syntax if desired. |
| if (TAI.usesSunStyleELFSectionSwitchSyntax() && |
| !(Flags & MCSectionELF::SHF_MERGE)) { |
| if (Flags & MCSectionELF::SHF_ALLOC) |
| OS << ",#alloc"; |
| if (Flags & MCSectionELF::SHF_EXECINSTR) |
| OS << ",#execinstr"; |
| if (Flags & MCSectionELF::SHF_WRITE) |
| OS << ",#write"; |
| if (Flags & MCSectionELF::SHF_TLS) |
| OS << ",#tls"; |
| } else { |
| OS << ",\""; |
| |
| if (Flags & MCSectionELF::SHF_ALLOC) |
| OS << 'a'; |
| if (Flags & MCSectionELF::SHF_EXECINSTR) |
| OS << 'x'; |
| if (Flags & MCSectionELF::SHF_WRITE) |
| OS << 'w'; |
| if (Flags & MCSectionELF::SHF_MERGE) |
| OS << 'M'; |
| if (Flags & MCSectionELF::SHF_STRINGS) |
| OS << 'S'; |
| if (Flags & MCSectionELF::SHF_TLS) |
| OS << 'T'; |
| |
| OS << '"'; |
| |
| if (ShouldPrintSectionType(Type)) { |
| OS << ','; |
| |
| // If comment string is '@', e.g. as on ARM - use '%' instead |
| if (TAI.getCommentString()[0] == '@') |
| OS << '%'; |
| else |
| OS << '@'; |
| |
| if (Type == MCSectionELF::SHT_INIT_ARRAY) |
| OS << "init_array"; |
| else if (Type == MCSectionELF::SHT_FINI_ARRAY) |
| OS << "fini_array"; |
| else if (Type == MCSectionELF::SHT_PREINIT_ARRAY) |
| OS << "preinit_array"; |
| else if (Type == MCSectionELF::SHT_NOBITS) |
| OS << "nobits"; |
| else if (Type == MCSectionELF::SHT_PROGBITS) |
| OS << "progbits"; |
| |
| if (getKind().isMergeable1ByteCString()) { |
| OS << ",1"; |
| } else if (getKind().isMergeable2ByteCString()) { |
| OS << ",2"; |
| } else if (getKind().isMergeable4ByteCString() || |
| getKind().isMergeableConst4()) { |
| OS << ",4"; |
| } else if (getKind().isMergeableConst8()) { |
| OS << ",8"; |
| } else if (getKind().isMergeableConst16()) { |
| OS << ",16"; |
| } |
| } |
| } |
| |
| OS << '\n'; |
| } |
| |