Delay the creation of eh_frame so that the user can change the defaults.

Add support for SHT_X86_64_UNWIND.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124059 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 9 insertions, 5 deletions

diff --git a/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h b/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
index d8f0373859..fba3e48c47 100644
--- a/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
+++ b/include/llvm/CodeGen/TargetLoweringObjectFileImpl.h
@@ -57,6 +57,8 @@ public:
 
   virtual void Initialize(MCContext &Ctx, const TargetMachine &TM);
 
+  virtual const MCSection *getEHFrameSection() const;
+
   const MCSection *getDataRelSection() const { return DataRelSection; }
 
   /// getSectionForConstant - Given a constant with the SectionKind, return a
@@ -121,6 +123,8 @@ public:
 
   virtual void Initialize(MCContext &Ctx, const TargetMachine &TM);
 
+  virtual const MCSection *getEHFrameSection() const;
+
   virtual const MCSection *
   SelectSectionForGlobal(const GlobalValue *GV, SectionKind Kind,
                          Mangler *Mang, const TargetMachine &TM) const;
@@ -184,6 +188,8 @@ public:
 
   virtual void Initialize(MCContext &Ctx, const TargetMachine &TM);
 
+  virtual const MCSection *getEHFrameSection() const;
+
   virtual const MCSection *getDrectveSection() const { return DrectveSection; }
 
   virtual const MCSection *
diff --git a/include/llvm/Support/ELF.h b/include/llvm/Support/ELF.h
index 55f5d58d11..58c216bdfe 100644
--- a/include/llvm/Support/ELF.h
+++ b/include/llvm/Support/ELF.h
@@ -501,6 +501,8 @@ enum {
   SHT_ARM_DEBUGOVERLAY    = 0x70000004U,
   SHT_ARM_OVERLAYSECTION  = 0x70000005U,
 
+  SHT_X86_64_UNWIND       = 0x70000001, // Unwind information
+
   SHT_HIPROC        = 0x7fffffff, // Highest processor architecture-specific type.
   SHT_LOUSER        = 0x80000000, // Lowest type reserved for applications.
   SHT_HIUSER        = 0xffffffff  // Highest type reserved for applications.
diff --git a/include/llvm/Target/TargetLoweringObjectFile.h b/include/llvm/Target/TargetLoweringObjectFile.h
index 5456dd0700..34bf27132d 100644
--- a/include/llvm/Target/TargetLoweringObjectFile.h
+++ b/include/llvm/Target/TargetLoweringObjectFile.h
@@ -69,10 +69,6 @@ protected:
   /// the section the Language Specific Data Area information is emitted to.
   const MCSection *LSDASection;
   
-  /// EHFrameSection - If exception handling is supported by the target, this is
-  /// the section the EH Frame is emitted to.
-  const MCSection *EHFrameSection;
-  
   // Dwarf sections for debug info.  If a target supports debug info, these must
   // be set.
   const MCSection *DwarfAbbrevSection;
@@ -143,7 +139,7 @@ public:
   const MCSection *getStaticCtorSection() const { return StaticCtorSection; }
   const MCSection *getStaticDtorSection() const { return StaticDtorSection; }
   const MCSection *getLSDASection() const { return LSDASection; }
-  const MCSection *getEHFrameSection() const { return EHFrameSection; }
+  virtual const MCSection *getEHFrameSection() const = 0;
   const MCSection *getDwarfAbbrevSection() const { return DwarfAbbrevSection; }
   const MCSection *getDwarfInfoSection() const { return DwarfInfoSection; }
   const MCSection *getDwarfLineSection() const { return DwarfLineSection; }