From e2b0ecd8be031685a4fe63633235eceae7f1c4fa Mon Sep 17 00:00:00 2001
From: Bruno Cardoso Lopes <bruno.cardoso@gmail.com>
Date: Sat, 18 Jul 2009 23:24:01 +0000
Subject: Use R_X86_64_32S to handle Jump Table Index relocation entries. Hide
 TAI usage inside getSection* functions

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@76347 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/ELFWriter.cpp | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

(limited to 'lib/CodeGen/ELFWriter.cpp')

diff --git a/lib/CodeGen/ELFWriter.cpp b/lib/CodeGen/ELFWriter.cpp
index 69220f9aea..527adb821e 100644
--- a/lib/CodeGen/ELFWriter.cpp
+++ b/lib/CodeGen/ELFWriter.cpp
@@ -145,6 +145,24 @@ bool ELFWriter::doInitialization(Module &M) {
   return false;
 }
 
+/// Get jump table section on the section name returned by TAI
+ELFSection &ELFWriter::getJumpTableSection() {
+  unsigned Align = TM.getTargetData()->getPointerABIAlignment();
+  return getSection(TAI->getJumpTableDataSection(),
+                    ELFSection::SHT_PROGBITS,
+                    ELFSection::SHF_ALLOC, Align);
+}
+
+///  Get a constant pool section based on the section name returned by TAI
+ELFSection &ELFWriter::getConstantPoolSection(MachineConstantPoolEntry &CPE) {
+  std::string CstPoolName =
+    TAI->SelectSectionForMachineConst(CPE.getType())->getName();
+  return getSection(CstPoolName,
+                    ELFSection::SHT_PROGBITS,
+                    ELFSection::SHF_MERGE | ELFSection::SHF_ALLOC,
+                    CPE.getAlignment());
+}
+
 // getGlobalELFVisibility - Returns the ELF specific visibility type
 unsigned ELFWriter::getGlobalELFVisibility(const GlobalValue *GV) {
   switch (GV->getVisibility()) {
@@ -513,9 +531,14 @@ void ELFWriter::EmitRelocations() {
           Addend = TEW->getDefaultAddendForRelTy(RelType);
         }
       } else {
-        // Get the symbol index for the section symbol referenced
-        // by the relocation
+        // Get the symbol index for the section symbol
         unsigned SectionIdx = MR.getConstantVal();
+
+        // Handle Jump Table Index relocation
+        if ((SectionIdx == getJumpTableSection().SectionIdx) &&
+            TEW->hasCustomJumpTableIndexRelTy())
+          RelType = TEW->getJumpTableIndexRelTy();
+
         SymIdx = SectionList[SectionIdx]->getSymbolTableIndex();
         Addend = (uint64_t)MR.getResultPointer();
       }
-- 
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