1 //===- Writer.h -------------------------------------------------*- C++ -*-===//
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #ifndef LLD_COFF_WRITER_H
11 #define LLD_COFF_WRITER_H
14 #include "llvm/ADT/StringRef.h"
15 #include "llvm/Object/COFF.h"
21 static const int PageSize = 4096;
25 // OutputSection represents a section in an output file. It's a
26 // container of chunks. OutputSection and Chunk are 1:N relationship.
27 // Chunks cannot belong to more than one OutputSections. The writer
28 // creates multiple OutputSections and assign them unique,
29 // non-overlapping file offsets and RVAs.
32 OutputSection(llvm::StringRef N) : Name(N), Header({}) {}
33 void setRVA(uint64_t);
34 void setFileOffset(uint64_t);
35 void addChunk(Chunk *C);
36 llvm::StringRef getName() { return Name; }
37 ArrayRef<Chunk *> getChunks() { return Chunks; }
38 void addPermissions(uint32_t C);
39 void setPermissions(uint32_t C);
40 uint32_t getPermissions() { return Header.Characteristics & PermMask; }
41 uint32_t getCharacteristics() { return Header.Characteristics; }
42 uint64_t getRVA() { return Header.VirtualAddress; }
43 uint64_t getFileOff() { return Header.PointerToRawData; }
44 void writeHeaderTo(uint8_t *Buf);
46 // Returns the size of this section in an executable memory image.
47 // This may be smaller than the raw size (the raw size is multiple
48 // of disk sector size, so there may be padding at end), or may be
49 // larger (if that's the case, the loader reserves spaces after end
51 uint64_t getVirtualSize() { return Header.VirtualSize; }
53 // Returns the size of the section in the output file.
54 uint64_t getRawSize() { return Header.SizeOfRawData; }
56 // Set offset into the string table storing this section name.
57 // Used only when the name is longer than 8 bytes.
58 void setStringTableOff(uint32_t V) { StringTableOff = V; }
60 // N.B. The section index is one based.
61 uint32_t SectionIndex = 0;
65 llvm::object::coff_section Header;
66 uint32_t StringTableOff = 0;
67 std::vector<Chunk *> Chunks;