f28825bc06
This change itself doesn't mean anything, but it helps D59780 because in patch, we don't know whether we need to create a CET-aware PLT or not until we read all input files. llvm-svn: 357194
80 lines
1.9 KiB
C++
80 lines
1.9 KiB
C++
//===- PPC.cpp ------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "Symbols.h"
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#include "Target.h"
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#include "lld/Common/ErrorHandler.h"
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#include "llvm/Support/Endian.h"
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using namespace llvm;
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using namespace llvm::support::endian;
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using namespace llvm::ELF;
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using namespace lld;
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using namespace lld::elf;
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namespace {
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class PPC final : public TargetInfo {
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public:
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PPC();
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void relocateOne(uint8_t *Loc, RelType Type, uint64_t Val) const override;
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RelExpr getRelExpr(RelType Type, const Symbol &S,
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const uint8_t *Loc) const override;
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};
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} // namespace
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PPC::PPC() {
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NoneRel = R_PPC_NONE;
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GotBaseSymInGotPlt = false;
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}
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RelExpr PPC::getRelExpr(RelType Type, const Symbol &S,
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const uint8_t *Loc) const {
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switch (Type) {
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case R_PPC_REL14:
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case R_PPC_REL24:
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case R_PPC_REL32:
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return R_PC;
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case R_PPC_PLTREL24:
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return R_PLT_PC;
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default:
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return R_ABS;
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}
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}
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void PPC::relocateOne(uint8_t *Loc, RelType Type, uint64_t Val) const {
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switch (Type) {
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case R_PPC_ADDR16_HA:
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write16be(Loc, (Val + 0x8000) >> 16);
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break;
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case R_PPC_ADDR16_HI:
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write16be(Loc, Val >> 16);
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break;
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case R_PPC_ADDR16_LO:
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write16be(Loc, Val);
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break;
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case R_PPC_ADDR32:
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case R_PPC_REL32:
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write32be(Loc, Val);
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break;
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case R_PPC_REL14:
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write32be(Loc, read32be(Loc) | (Val & 0xFFFC));
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break;
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case R_PPC_PLTREL24:
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case R_PPC_REL24:
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write32be(Loc, read32be(Loc) | (Val & 0x3FFFFFC));
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break;
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default:
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error(getErrorLocation(Loc) + "unrecognized reloc " + Twine(Type));
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}
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}
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TargetInfo *elf::getPPCTargetInfo() {
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static PPC Target;
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return &Target;
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}
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