X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FMC%2FMCSectionELF.cpp;h=92d2b9667c80513d2af238106369f050516d6fb2;hb=434302d503c8eeb7e47c9155488367145e2ed907;hp=4d520ecd20a1819a56ca2e8b5db3c67c54542c4a;hpb=4d2419d7519e2bc3b437d01984f9fb268dd7a3cd;p=oota-llvm.git

diff --git a/lib/MC/MCSectionELF.cpp b/lib/MC/MCSectionELF.cpp
index 4d520ecd20a..92d2b9667c8 100644
--- a/lib/MC/MCSectionELF.cpp
+++ b/lib/MC/MCSectionELF.cpp
@@ -10,128 +10,157 @@
 #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"
+
 using namespace llvm;
 
-MCSectionELF *MCSectionELF::
-Create(StringRef Section, unsigned Type, unsigned Flags,
-       SectionKind K, bool isExplicit, MCContext &Ctx) {
-  return new (Ctx) MCSectionELF(Section, Type, Flags, K, isExplicit);
-}
+MCSectionELF::~MCSectionELF() {} // anchor.
 
-// ShouldOmitSectionDirective - Decides whether a '.section' directive
-// should be printed before the section name
-bool MCSectionELF::ShouldOmitSectionDirective(const char *Name,
+// Decides whether a '.section' directive
+// should be printed before the section name.
+bool MCSectionELF::ShouldOmitSectionDirective(StringRef Name,
                                               const MCAsmInfo &MAI) const {
-  
-  // FIXME: Does .section .bss/.data/.text work everywhere??
-  if (strcmp(Name, ".text") == 0 ||
-      strcmp(Name, ".data") == 0 ||
-      (strcmp(Name, ".bss") == 0 &&
-       !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))
+  if (isUnique())
     return false;
 
-  return true;
+  return MAI.shouldOmitSectionDirective(Name);
+}
+
+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 &MAI,
-                                        raw_ostream &OS) const {
-   
-  if (ShouldOmitSectionDirective(SectionName.c_str(), MAI)) {
-    OS << '\t' << getSectionName() << '\n';
+                                        raw_ostream &OS,
+                                        const MCExpr *Subsection) const {
+
+  if (ShouldOmitSectionDirective(SectionName, MAI)) {
+    OS << '\t' << getSectionName();
+    if (Subsection) {
+      OS << '\t';
+      Subsection->print(OS, &MAI);
+    }
+    OS << '\n';
     return;
   }
 
-  OS << "\t.section\t" << getSectionName();
-  
+  OS << "\t.section\t";
+  printName(OS, getSectionName());
+
   // Handle the weird solaris syntax if desired.
-  if (MAI.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(MAI, OS);
-    
-    OS << '"';
-
-    if (ShouldPrintSectionType(Type)) {
-      OS << ',';
-   
-      // If comment string is '@', e.g. as on ARM - use '%' instead
-      if (MAI.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->print(OS, &MAI);
+    OS << '\n';
+  }
 }
 
+bool MCSectionELF::UseCodeAlign() const {
+  return getFlags() & ELF::SHF_EXECINSTR;
+}
 
+bool MCSectionELF::isVirtualSection() const {
+  return getType() == ELF::SHT_NOBITS;
+}