lld/ELF/Writer.h

   1 //===- Writer.h -------------------------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #ifndef LLD_ELF_WRITER_H
  10 #define LLD_ELF_WRITER_H
  11
  12 #include "Config.h"
  13 #include "llvm/ADT/StringRef.h"
  14 #include <cstdint>
  15
  16 namespace lld::elf {
  17 class InputFile;
  18 class OutputSection;
  19 void copySectionsIntoPartitions();
  20 template <class ELFT> void writeResult();
  21
  22 // This describes a program header entry.
  23 // Each contains type, access flags and range of output sections that will be
  24 // placed in it.
  25 struct PhdrEntry {
  26   PhdrEntry(unsigned type, unsigned flags)
  27       : p_align(type == llvm::ELF::PT_LOAD ? config->maxPageSize : 0),
  28         p_type(type), p_flags(flags) {}
  29   void add(OutputSection *sec);
  30
  31   uint64_t p_paddr = 0;
  32   uint64_t p_vaddr = 0;
  33   uint64_t p_memsz = 0;
  34   uint64_t p_filesz = 0;
  35   uint64_t p_offset = 0;
  36   uint32_t p_align = 0;
  37   uint32_t p_type = 0;
  38   uint32_t p_flags = 0;
  39
  40   OutputSection *firstSec = nullptr;
  41   OutputSection *lastSec = nullptr;
  42   bool hasLMA = false;
  43
  44   uint64_t lmaOffset = 0;
  45 };
  46
  47 void addReservedSymbols();
  48 bool includeInSymtab(const Symbol &b);
  49 unsigned getSectionRank(OutputSection &osec);
  50
  51 template <class ELFT> uint32_t calcMipsEFlags();
  52
  53 uint8_t getMipsFpAbiFlag(uint8_t oldFlag, uint8_t newFlag,
  54                          llvm::StringRef fileName);
  55
  56 bool isMipsN32Abi(const InputFile *f);
  57 bool isMicroMips();
  58 bool isMipsR6();
  59
  60 } // namespace lld::elf
  61
  62 #endif