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Produce an undefined reference to _GLOBAL_OFFSET_TABLE_ if we have a

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VK_GOTOFF reloc. This matches as' behavior, but it is not clear why the linker
might need this, so I added a FIXME.

I could test this by duplicating test/MC/ELF/got.s, but it doesn't look
worthwhile.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132655 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola 2011-06-05 01:20:06 +00:00
parent 8f1282d9cb
commit 378e0ecf24
1 changed files with 2 additions and 0 deletions
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2
lib/MC/ELFObjectWriter.cpp
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@ -62,6 +62,7 @@ bool ELFObjectWriter::RelocNeedsGOT(MCSymbolRefExpr::VariantKind Variant) {
case MCSymbolRefExpr::VK_GOT: case MCSymbolRefExpr::VK_GOT:
case MCSymbolRefExpr::VK_PLT: case MCSymbolRefExpr::VK_PLT:
case MCSymbolRefExpr::VK_GOTPCREL: case MCSymbolRefExpr::VK_GOTPCREL:
case MCSymbolRefExpr::VK_GOTOFF:
case MCSymbolRefExpr::VK_TPOFF: case MCSymbolRefExpr::VK_TPOFF:
case MCSymbolRefExpr::VK_TLSGD: case MCSymbolRefExpr::VK_TLSGD:
case MCSymbolRefExpr::VK_GOTTPOFF: case MCSymbolRefExpr::VK_GOTTPOFF:
@ -556,6 +557,7 @@ void ELFObjectWriter::ComputeSymbolTable(MCAssembler &Asm,
RevGroupMapTy RevGroupMap, RevGroupMapTy RevGroupMap,
unsigned NumRegularSections) { unsigned NumRegularSections) {
// FIXME: Is this the correct place to do this? // FIXME: Is this the correct place to do this?
// FIXME: Why is an undefined reference to _GLOBAL_OFFSET_TABLE_ needed?
if (NeedsGOT) { if (NeedsGOT) {
llvm::StringRef Name = "_GLOBAL_OFFSET_TABLE_"; llvm::StringRef Name = "_GLOBAL_OFFSET_TABLE_";
MCSymbol *Sym = Asm.getContext().GetOrCreateSymbol(Name); MCSymbol *Sym = Asm.getContext().GetOrCreateSymbol(Name);