forked from OSchip/llvm-project
151 lines
5.1 KiB
C++
151 lines
5.1 KiB
C++
//===- InputSection.h -------------------------------------------*- C++ -*-===//
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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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#ifndef LLD_MACHO_INPUT_SECTION_H
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#define LLD_MACHO_INPUT_SECTION_H
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#include "Relocations.h"
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#include "lld/Common/LLVM.h"
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/BinaryFormat/MachO.h"
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namespace lld {
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namespace macho {
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class InputFile;
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class InputSection;
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class OutputSection;
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class InputSection {
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public:
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virtual ~InputSection() = default;
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virtual uint64_t getSize() const { return data.size(); }
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virtual uint64_t getFileSize() const;
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uint64_t getFileOffset() const;
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uint64_t getVA() const;
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virtual void writeTo(uint8_t *buf);
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InputFile *file = nullptr;
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StringRef name;
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StringRef segname;
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OutputSection *parent = nullptr;
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uint64_t outSecOff = 0;
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uint64_t outSecFileOff = 0;
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uint32_t align = 1;
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uint32_t flags = 0;
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// How many symbols refer to this InputSection.
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uint32_t numRefs = 0;
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// True if this InputSection could not be written to the output file.
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// With subsections_via_symbols, most symbol have its own InputSection,
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// and for weak symbols (e.g. from inline functions), only the
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// InputSection from one translation unit will make it to the output,
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// while all copies in other translation units are coalesced into the
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// first and not copied to the output.
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bool canOmitFromOutput = false;
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bool shouldOmitFromOutput() const {
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return canOmitFromOutput && numRefs == 0;
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}
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ArrayRef<uint8_t> data;
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std::vector<Reloc> relocs;
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};
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inline uint8_t sectionType(uint32_t flags) {
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return flags & llvm::MachO::SECTION_TYPE;
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}
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inline bool isZeroFill(uint32_t flags) {
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return llvm::MachO::isVirtualSection(sectionType(flags));
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}
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inline bool isThreadLocalVariables(uint32_t flags) {
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return sectionType(flags) == llvm::MachO::S_THREAD_LOCAL_VARIABLES;
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}
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// These sections contain the data for initializing thread-local variables.
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inline bool isThreadLocalData(uint32_t flags) {
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return sectionType(flags) == llvm::MachO::S_THREAD_LOCAL_REGULAR ||
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sectionType(flags) == llvm::MachO::S_THREAD_LOCAL_ZEROFILL;
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}
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inline bool isDebugSection(uint32_t flags) {
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return (flags & llvm::MachO::SECTION_ATTRIBUTES_USR) ==
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llvm::MachO::S_ATTR_DEBUG;
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}
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bool isCodeSection(InputSection *);
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extern std::vector<InputSection *> inputSections;
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namespace section_names {
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constexpr const char authGot[] = "__auth_got";
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constexpr const char authPtr[] = "__auth_ptr";
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constexpr const char binding[] = "__binding";
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constexpr const char bitcodeBundle[] = "__bundle";
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constexpr const char cfString[] = "__cfstring";
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constexpr const char codeSignature[] = "__code_signature";
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constexpr const char common[] = "__common";
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constexpr const char compactUnwind[] = "__compact_unwind";
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constexpr const char data[] = "__data";
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constexpr const char debugAbbrev[] = "__debug_abbrev";
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constexpr const char debugInfo[] = "__debug_info";
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constexpr const char debugStr[] = "__debug_str";
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constexpr const char ehFrame[] = "__eh_frame";
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constexpr const char export_[] = "__export";
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constexpr const char functionStarts[] = "__func_starts";
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constexpr const char got[] = "__got";
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constexpr const char header[] = "__mach_header";
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constexpr const char indirectSymbolTable[] = "__ind_sym_tab";
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constexpr const char const_[] = "__const";
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constexpr const char lazySymbolPtr[] = "__la_symbol_ptr";
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constexpr const char lazyBinding[] = "__lazy_binding";
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constexpr const char moduleInitFunc[] = "__mod_init_func";
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constexpr const char moduleTermFunc[] = "__mod_term_func";
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constexpr const char nonLazySymbolPtr[] = "__nl_symbol_ptr";
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constexpr const char objcCatList[] = "__objc_catlist";
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constexpr const char objcClassList[] = "__objc_classlist";
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constexpr const char objcConst[] = "__objc_const";
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constexpr const char objcImageInfo[] = "__objc_imageinfo";
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constexpr const char objcNonLazyCatList[] = "__objc_nlcatlist";
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constexpr const char objcNonLazyClassList[] = "__objc_nlclslist";
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constexpr const char objcProtoList[] = "__objc_protolist";
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constexpr const char pageZero[] = "__pagezero";
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constexpr const char pointers[] = "__pointers";
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constexpr const char rebase[] = "__rebase";
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constexpr const char staticInit[] = "__StaticInit";
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constexpr const char stringTable[] = "__string_table";
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constexpr const char stubHelper[] = "__stub_helper";
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constexpr const char stubs[] = "__stubs";
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constexpr const char swift[] = "__swift";
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constexpr const char symbolTable[] = "__symbol_table";
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constexpr const char textCoalNt[] = "__textcoal_nt";
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constexpr const char text[] = "__text";
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constexpr const char threadPtrs[] = "__thread_ptrs";
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constexpr const char threadVars[] = "__thread_vars";
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constexpr const char unwindInfo[] = "__unwind_info";
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constexpr const char weakBinding[] = "__weak_binding";
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constexpr const char zeroFill[] = "__zerofill";
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} // namespace section_names
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} // namespace macho
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std::string toString(const macho::InputSection *);
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} // namespace lld
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#endif
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