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//===- PPC.cpp ------------------------------------------------------------===//
//
// The LLVM Linker
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "Symbols.h"
#include "Target.h"
#include "lld/Common/ErrorHandler.h"
#include "llvm/Support/Endian.h"
using namespace llvm;
using namespace llvm::support::endian;
using namespace llvm::ELF;
using namespace lld;
using namespace lld::elf;
namespace {
class PPC final : public TargetInfo {
public:
PPC();
void relocateOne(uint8_t *Loc, RelType Type, uint64_t Val) const override;
RelExpr getRelExpr(RelType Type, const Symbol &S,
const uint8_t *Loc) const override;
};
} // namespace
PPC::PPC() {
GotBaseSymOff = 0x8000;
GotBaseSymInGotPlt = false;
}
RelExpr PPC::getRelExpr(RelType Type, const Symbol &S,
const uint8_t *Loc) const {
switch (Type) {
case R_PPC_REL24:
case R_PPC_REL32:
return R_PC;
case R_PPC_PLTREL24:
return R_PLT_PC;
default:
return R_ABS;
}
}
void PPC::relocateOne(uint8_t *Loc, RelType Type, uint64_t Val) const {
switch (Type) {
case R_PPC_ADDR16_HA:
write16be(Loc, (Val + 0x8000) >> 16);
break;
case R_PPC_ADDR16_HI:
write16be(Loc, Val >> 16);
break;
case R_PPC_ADDR16_LO:
write16be(Loc, Val);
break;
case R_PPC_ADDR32:
case R_PPC_REL32:
write32be(Loc, Val);
break;
case R_PPC_PLTREL24:
case R_PPC_REL24:
write32be(Loc, read32be(Loc) | (Val & 0x3FFFFFC));
break;
default:
error(getErrorLocation(Loc) + "unrecognized reloc " + Twine(Type));
}
}
TargetInfo *elf::getPPCTargetInfo() {
static PPC Target;
return &Target;
}
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