| //===- Target.h -------------------------------------------------*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLD_MACHO_TARGET_H |
| #define LLD_MACHO_TARGET_H |
| |
| #include <cstddef> |
| #include <cstdint> |
| |
| namespace lld { |
| namespace macho { |
| |
| class DylibSymbol; |
| |
| enum { |
| // We are currently only supporting 64-bit targets since macOS and iOS are |
| // deprecating 32-bit apps. |
| WordSize = 8, |
| PageSize = 4096, |
| ImageBase = 4096, |
| MaxAlignmentPowerOf2 = 32, |
| }; |
| |
| class TargetInfo { |
| public: |
| virtual ~TargetInfo() = default; |
| |
| virtual uint64_t getImplicitAddend(const uint8_t *loc, |
| uint8_t type) const = 0; |
| virtual void relocateOne(uint8_t *loc, uint8_t type, uint64_t val) const = 0; |
| |
| // Write code for lazy binding. See the comments on StubsSection for more |
| // details. |
| virtual void writeStub(uint8_t *buf, const DylibSymbol &) const = 0; |
| virtual void writeStubHelperHeader(uint8_t *buf) const = 0; |
| virtual void writeStubHelperEntry(uint8_t *buf, const DylibSymbol &, |
| uint64_t entryAddr) const = 0; |
| |
| // Dylib symbols are referenced via either the GOT or the stubs section, |
| // depending on the relocation type. prepareDylibSymbolRelocation() will set |
| // up the GOT/stubs entries, and getDylibSymbolVA() will return the addresses |
| // of those entries. |
| virtual void prepareDylibSymbolRelocation(DylibSymbol &, uint8_t type) = 0; |
| virtual uint64_t getDylibSymbolVA(const DylibSymbol &, |
| uint8_t type) const = 0; |
| |
| uint32_t cpuType; |
| uint32_t cpuSubtype; |
| |
| size_t stubSize; |
| size_t stubHelperHeaderSize; |
| size_t stubHelperEntrySize; |
| }; |
| |
| TargetInfo *createX86_64TargetInfo(); |
| |
| extern TargetInfo *target; |
| |
| } // namespace macho |
| } // namespace lld |
| |
| #endif |