//===----------------------------------------------------------------------===//
#include "llvm/MC/MCSectionELF.h"
+#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
+#include "llvm/MC/MCExpr.h"
+#include "llvm/MC/MCSymbol.h"
+#include "llvm/Support/ELF.h"
#include "llvm/Support/raw_ostream.h"
-#include "llvm/MC/MCAsmInfo.h"
using namespace llvm;
-MCSectionELF *MCSectionELF::
-Create(const StringRef &Section, unsigned Type, unsigned Flags,
- SectionKind K, bool isExplicit, MCContext &Ctx) {
- return new (Ctx) MCSectionELF(Section, Type, Flags, K, isExplicit);
-}
+MCSectionELF::~MCSectionELF() {} // anchor.
+
+// Decides whether a '.section' directive
+// should be printed before the section name.
+bool MCSectionELF::ShouldOmitSectionDirective(StringRef Name,
+ const MCAsmInfo &MAI) const {
+
+ if (isUnique())
+ return false;
-// ShouldOmitSectionDirective - Decides whether a '.section' directive
-// should be printed before the section name
-bool MCSectionELF::ShouldOmitSectionDirective(const char *Name,
- const MCAsmInfo &TAI) const {
-
// FIXME: Does .section .bss/.data/.text work everywhere??
- if (strcmp(Name, ".text") == 0 ||
- strcmp(Name, ".data") == 0 ||
- (strcmp(Name, ".bss") == 0 &&
- !TAI.usesELFSectionDirectiveForBSS()))
+ 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;
+static void printName(raw_ostream &OS, StringRef Name) {
+ if (Name.find_first_not_of("0123456789_."
+ "abcdefghijklmnopqrstuvwxyz"
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZ") == Name.npos) {
+ OS << Name;
+ return;
+ }
+ OS << '"';
+ 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 << '"';
}
-void MCSectionELF::PrintSwitchToSection(const MCAsmInfo &TAI,
- raw_ostream &OS) const {
-
- if (ShouldOmitSectionDirective(SectionName.c_str(), TAI)) {
- OS << '\t' << getSectionName() << '\n';
+void MCSectionELF::PrintSwitchToSection(const MCAsmInfo &MAI,
+ raw_ostream &OS,
+ const MCExpr *Subsection) const {
+
+ if (ShouldOmitSectionDirective(SectionName, MAI)) {
+ OS << '\t' << getSectionName();
+ if (Subsection)
+ OS << '\t' << *Subsection;
+ OS << '\n';
return;
}
- OS << "\t.section\t" << getSectionName();
-
+ OS << "\t.section\t";
+ printName(OS, getSectionName());
+
// 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_EXCLUDE)
+ OS << ",#exclude";
+ if (Flags & ELF::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';
-
- // If there are target-specific flags, print them.
- if (Flags & ~MCSectionELF::TARGET_INDEP_SHF)
- PrintTargetSpecificSectionFlags(TAI, OS);
-
- 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';
+ return;
}
-
- OS << '\n';
-}
-// HasCommonSymbols - True if this section holds common symbols, this is
-// indicated on the ELF object file by a symbol with SHN_COMMON section
-// header index.
-bool MCSectionELF::HasCommonSymbols() const {
-
- if (strncmp(SectionName.c_str(), ".gnu.linkonce.", 14) == 0)
- return true;
+ OS << ",\"";
+ if (Flags & ELF::SHF_ALLOC)
+ OS << 'a';
+ if (Flags & ELF::SHF_EXCLUDE)
+ OS << 'e';
+ 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';
- return false;
+ // 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 << '"';
+
+ 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 << ",";
+ printName(OS, Group->getName());
+ OS << ",comdat";
+ }
+
+ if (isUnique())
+ OS << ",unique," << UniqueID;
+
+ OS << '\n';
+
+ if (Subsection)
+ OS << "\t.subsection\t" << *Subsection << '\n';
}
+bool MCSectionELF::UseCodeAlign() const {
+ return getFlags() & ELF::SHF_EXECINSTR;
+}
+bool MCSectionELF::isVirtualSection() const {
+ return getType() == ELF::SHT_NOBITS;
+}
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