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Initial TOC support for PowerPC64 object creation

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This patch adds initial PPC64 TOC MC object creation using the small mcmodel
(a single 64K TOC) adding the some TOC relocations (R_PPC64_TOC,
R_PPC64_TOC16, and R_PPC64_TOC16DS).

The addition of 'undefinedExplicitRelSym' hook on 'MCELFObjectTargetWriter'
is meant to avoid the creation of an unreferenced ".TOC." symbol (used in
the .odp creation) as well to set the R_PPC64_TOC relocation target as the
temporary ".TOC." symbol. On PPC64 ABI, the R_PPC64_TOC relocation should
not point to any symbol.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@166677 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Adhemerval Zanella
2012-10-25 12:27:42 +00:00
parent c0cd72204d
commit aa71428378
11 changed files with 223 additions and 23 deletions
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8
lib/MC/MCELFObjectTargetWriter.cpp
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@ -9,6 +9,8 @@
#include "llvm/ADT/STLExtras.h"
#include "llvm/MC/MCELFObjectWriter.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCValue.h"
using namespace llvm;
@ -35,6 +37,12 @@ const MCSymbol *MCELFObjectTargetWriter::ExplicitRelSym(const MCAssembler &Asm,
return NULL;
}
const MCSymbol *MCELFObjectTargetWriter::undefinedExplicitRelSym(const MCValue &Target,
const MCFixup &Fixup,
bool IsPCRel) const {
const MCSymbol &Symbol = Target.getSymA()->getSymbol();
return &Symbol.AliasedSymbol();
}
void MCELFObjectTargetWriter::adjustFixupOffset(const MCFixup &Fixup,
uint64_t &RelocOffset) {