X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=blobdiff_plain;f=lib%2FMC%2FMCSectionELF.cpp;h=3cd84538425db0cc3970027cdd44265aa3357551;hp=a53489790d28c3143149c4292803fbe30b7b3a4d;hb=e93f977e8d84407de9aec402473487737ad1339b;hpb=98976610d2c8067efe04042f17486a4b6c746b31

diff --git a/lib/MC/MCSectionELF.cpp b/lib/MC/MCSectionELF.cpp
index a53489790d2..3cd84538425 100644
--- a/lib/MC/MCSectionELF.cpp
+++ b/lib/MC/MCSectionELF.cpp
@@ -10,17 +10,23 @@
 #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() {} // anchor.
 
-// ShouldOmitSectionDirective - Decides whether a '.section' directive
-// should be printed before the section name
+// 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;
+
   // FIXME: Does .section .bss/.data/.text work everywhere??
   if (Name == ".text" || Name == ".data" ||
       (Name == ".bss" && !MAI.usesELFSectionDirectiveForBSS()))
@@ -29,51 +35,85 @@ bool MCSectionELF::ShouldOmitSectionDirective(StringRef Name,
   return false;
 }
 
+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 {
-   
+                                        raw_ostream &OS,
+                                        const MCExpr *Subsection) const {
+
   if (ShouldOmitSectionDirective(SectionName, MAI)) {
-    OS << '\t' << getSectionName() << '\n';
+    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 (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";
     OS << '\n';
     return;
   }
-  
+
   OS << ",\"";
-  if (Flags & MCSectionELF::SHF_ALLOC)
+  if (Flags & ELF::SHF_ALLOC)
     OS << 'a';
-  if (Flags & MCSectionELF::SHF_EXECINSTR)
+  if (Flags & ELF::SHF_EXCLUDE)
+    OS << 'e';
+  if (Flags & ELF::SHF_EXECINSTR)
     OS << 'x';
-  if (Flags & MCSectionELF::SHF_WRITE)
+  if (Flags & ELF::SHF_GROUP)
+    OS << 'G';
+  if (Flags & ELF::SHF_WRITE)
     OS << 'w';
-  if (Flags & MCSectionELF::SHF_MERGE)
+  if (Flags & ELF::SHF_MERGE)
     OS << 'M';
-  if (Flags & MCSectionELF::SHF_STRINGS)
+  if (Flags & ELF::SHF_STRINGS)
     OS << 'S';
-  if (Flags & MCSectionELF::SHF_TLS)
+  if (Flags & ELF::SHF_TLS)
     OS << 'T';
-  
+
   // If there are target-specific flags, print them.
-  if (Flags & MCSectionELF::XCORE_SHF_CP_SECTION)
+  if (Flags & ELF::XCORE_SHF_CP_SECTION)
     OS << 'c';
-  if (Flags & MCSectionELF::XCORE_SHF_DP_SECTION)
+  if (Flags & ELF::XCORE_SHF_DP_SECTION)
     OS << 'd';
-  
+
   OS << '"';
 
   OS << ',';
@@ -84,52 +124,43 @@ void MCSectionELF::PrintSwitchToSection(const MCAsmInfo &MAI,
   else
     OS << '@';
 
-  if (Type == MCSectionELF::SHT_INIT_ARRAY)
+  if (Type == ELF::SHT_INIT_ARRAY)
     OS << "init_array";
-  else if (Type == MCSectionELF::SHT_FINI_ARRAY)
+  else if (Type == ELF::SHT_FINI_ARRAY)
     OS << "fini_array";
-  else if (Type == MCSectionELF::SHT_PREINIT_ARRAY)
+  else if (Type == ELF::SHT_PREINIT_ARRAY)
     OS << "preinit_array";
-  else if (Type == MCSectionELF::SHT_NOBITS)
+  else if (Type == ELF::SHT_NOBITS)
     OS << "nobits";
-  else if (Type == MCSectionELF::SHT_NOTE)
+  else if (Type == ELF::SHT_NOTE)
     OS << "note";
-  else if (Type == MCSectionELF::SHT_PROGBITS)
+  else if (Type == ELF::SHT_PROGBITS)
     OS << "progbits";
 
   if (EntrySize) {
-    assert(Flags & MCSectionELF::SHF_MERGE);
+    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() & MCSectionELF::SHF_EXECINSTR;
+  return getFlags() & ELF::SHF_EXECINSTR;
 }
 
 bool MCSectionELF::isVirtualSection() const {
-  return getType() == MCSectionELF::SHT_NOBITS;
-}
-
-// 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 (StringRef(SectionName).startswith(".gnu.linkonce."))
-    return true;
-
-  return false;
-}
-
-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;
+  return getType() == ELF::SHT_NOBITS;
 }