//===----------------------------------------------------------------------===//
#include "llvm/MC/MCSectionELF.h"
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/ELF.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);
-}
+MCSectionELF::~MCSectionELF() {} // anchor.
// ShouldOmitSectionDirective - Decides whether a '.section' directive
// should be printed before the section name
-bool MCSectionELF::ShouldOmitSectionDirective(const char *Name) const {
+bool MCSectionELF::ShouldOmitSectionDirective(StringRef Name,
+ const MCAsmInfo &MAI) 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)
+ if (Name == ".text" || Name == ".data" ||
+ (Name == ".bss" && !MAI.usesELFSectionDirectiveForBSS()))
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,
+void MCSectionELF::PrintSwitchToSection(const MCAsmInfo &MAI,
raw_ostream &OS) const {
-
- if (ShouldOmitSectionDirective(SectionName.c_str())) {
+
+ if (ShouldOmitSectionDirective(SectionName, MAI)) {
OS << '\t' << getSectionName() << '\n';
return;
}
- OS << "\t.section\t" << getSectionName();
-
+ StringRef name = getSectionName();
+ if (name.find_first_not_of("0123456789_."
+ "abcdefghijklmnopqrstuvwxyz"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ") == name.npos) {
+ OS << "\t.section\t" << name;
+ } else {
+ OS << "\t.section\t\"";
+ for (const char *b = name.begin(), *e = name.end(); b < e; ++b) {
+ if (*b == '"') // Unquoted "
+ OS << "\\\"";
+ else if (*b != '\\') // Neither " or backslash
+ OS << *b;
+ else if (b + 1 == e) // Trailing backslash
+ OS << "\\\\";
+ else {
+ OS << b[0] << b[1]; // Quoted character
+ ++b;
+ }
+ }
+ OS << '"';
+ }
+
// Handle the weird solaris syntax if desired.
- if (TAI.usesSunStyleELFSectionSwitchSyntax() &&
- !(Flags & MCSectionELF::SHF_MERGE)) {
- if (Flags & MCSectionELF::SHF_ALLOC)
+ if (MAI.usesSunStyleELFSectionSwitchSyntax() &&
+ !(Flags & ELF::SHF_MERGE)) {
+ if (Flags & ELF::SHF_ALLOC)
OS << ",#alloc";
- if (Flags & MCSectionELF::SHF_EXECINSTR)
+ if (Flags & ELF::SHF_EXECINSTR)
OS << ",#execinstr";
- if (Flags & MCSectionELF::SHF_WRITE)
+ if (Flags & ELF::SHF_WRITE)
OS << ",#write";
- if (Flags & MCSectionELF::SHF_TLS)
+ if (Flags & ELF::SHF_TLS)
OS << ",#tls";
- } else {
- OS << ",\"";
+ OS << '\n';
+ return;
+ }
- 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 << '"';
+ OS << ",\"";
+ if (Flags & ELF::SHF_ALLOC)
+ OS << 'a';
+ if (Flags & ELF::SHF_EXECINSTR)
+ OS << 'x';
+ if (Flags & ELF::SHF_GROUP)
+ OS << 'G';
+ if (Flags & ELF::SHF_WRITE)
+ OS << 'w';
+ if (Flags & ELF::SHF_MERGE)
+ OS << 'M';
+ if (Flags & ELF::SHF_STRINGS)
+ OS << 'S';
+ if (Flags & ELF::SHF_TLS)
+ OS << 'T';
+
+ // If there are target-specific flags, print them.
+ if (Flags & ELF::XCORE_SHF_CP_SECTION)
+ OS << 'c';
+ if (Flags & ELF::XCORE_SHF_DP_SECTION)
+ OS << 'd';
+
+ 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 << ',';
+
+ // If comment string is '@', e.g. as on ARM - use '%' instead
+ if (MAI.getCommentString()[0] == '@')
+ OS << '%';
+ else
+ OS << '@';
+
+ if (Type == ELF::SHT_INIT_ARRAY)
+ OS << "init_array";
+ else if (Type == ELF::SHT_FINI_ARRAY)
+ OS << "fini_array";
+ else if (Type == ELF::SHT_PREINIT_ARRAY)
+ OS << "preinit_array";
+ else if (Type == ELF::SHT_NOBITS)
+ OS << "nobits";
+ else if (Type == ELF::SHT_NOTE)
+ OS << "note";
+ else if (Type == ELF::SHT_PROGBITS)
+ OS << "progbits";
+
+ if (EntrySize) {
+ assert(Flags & ELF::SHF_MERGE);
+ OS << "," << EntrySize;
}
-
+
+ if (Flags & ELF::SHF_GROUP)
+ OS << "," << Group->getName() << ",comdat";
OS << '\n';
}
+bool MCSectionELF::UseCodeAlign() const {
+ return getFlags() & ELF::SHF_EXECINSTR;
+}
+
+bool MCSectionELF::isVirtualSection() const {
+ return getType() == ELF::SHT_NOBITS;
+}
+
+unsigned MCSectionELF::DetermineEntrySize(SectionKind Kind) {
+ if (Kind.isMergeable1ByteCString()) return 1;
+ if (Kind.isMergeable2ByteCString()) return 2;
+ if (Kind.isMergeable4ByteCString()) return 4;
+ if (Kind.isMergeableConst4()) return 4;
+ if (Kind.isMergeableConst8()) return 8;
+ if (Kind.isMergeableConst16()) return 16;
+ return 0;
+}