1//===- ELFExecFileFormat.cpp ----------------------------------------------===//
2//
3//                     The MCLinker Project
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9#include <mcld/LD/ELFExecFileFormat.h>
10#include <mcld/LD/LDSection.h>
11#include <mcld/Object/ObjectBuilder.h>
12
13#include <llvm/Support/ELF.h>
14
15using namespace mcld;
16
17void ELFExecFileFormat::initObjectFormat(ObjectBuilder& pBuilder,
18                                         unsigned int pBitClass)
19{
20  // FIXME: make sure ELF executable files has these sections.
21  f_pDynSymTab    = pBuilder.CreateSection(".dynsym",
22                                           LDFileFormat::NamePool,
23                                           llvm::ELF::SHT_DYNSYM,
24                                           llvm::ELF::SHF_ALLOC,
25                                           pBitClass / 8);
26  f_pDynStrTab    = pBuilder.CreateSection(".dynstr",
27                                           LDFileFormat::NamePool,
28                                           llvm::ELF::SHT_STRTAB,
29                                           llvm::ELF::SHF_ALLOC,
30                                           0x1);
31  f_pInterp       = pBuilder.CreateSection(".interp",
32                                           LDFileFormat::Note,
33                                           llvm::ELF::SHT_PROGBITS,
34                                           llvm::ELF::SHF_ALLOC,
35                                           0x1);
36  f_pHashTab      = pBuilder.CreateSection(".hash",
37                                           LDFileFormat::NamePool,
38                                           llvm::ELF::SHT_HASH,
39                                           llvm::ELF::SHF_ALLOC,
40                                           pBitClass / 8);
41  f_pDynamic      = pBuilder.CreateSection(".dynamic",
42                                           LDFileFormat::NamePool,
43                                           llvm::ELF::SHT_DYNAMIC,
44                                           llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE,
45                                           pBitClass / 8);
46  f_pRelaDyn      = pBuilder.CreateSection(".rela.dyn",
47                                           LDFileFormat::Relocation,
48                                           llvm::ELF::SHT_RELA,
49                                           llvm::ELF::SHF_ALLOC,
50                                           pBitClass / 8);
51  f_pRelaPlt      = pBuilder.CreateSection(".rela.plt",
52                                           LDFileFormat::Relocation,
53                                           llvm::ELF::SHT_RELA,
54                                           llvm::ELF::SHF_ALLOC,
55                                           pBitClass / 8);
56  f_pRelDyn       = pBuilder.CreateSection(".rel.dyn",
57                                           LDFileFormat::Relocation,
58                                           llvm::ELF::SHT_REL,
59                                           llvm::ELF::SHF_ALLOC,
60                                           pBitClass / 8);
61  f_pRelPlt       = pBuilder.CreateSection(".rel.plt",
62                                           LDFileFormat::Relocation,
63                                           llvm::ELF::SHT_REL,
64                                           llvm::ELF::SHF_ALLOC,
65                                           pBitClass / 8);
66  f_pGOT          = pBuilder.CreateSection(".got",
67                                           LDFileFormat::Target,
68                                           llvm::ELF::SHT_PROGBITS,
69                                           llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE,
70                                           pBitClass / 8);
71  f_pPLT          = pBuilder.CreateSection(".plt",
72                                           LDFileFormat::Target,
73                                           llvm::ELF::SHT_PROGBITS,
74                                           llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_EXECINSTR,
75                                           pBitClass / 8);
76  f_pGOTPLT       = pBuilder.CreateSection(".got.plt",
77                                           LDFileFormat::Target,
78                                           llvm::ELF::SHT_PROGBITS,
79                                           llvm::ELF::SHF_ALLOC | llvm::ELF::SHF_WRITE,
80                                           pBitClass / 8);
81  f_pEhFrameHdr   = pBuilder.CreateSection(".eh_frame_hdr",
82                                           LDFileFormat::EhFrameHdr,
83                                           llvm::ELF::SHT_PROGBITS,
84                                           llvm::ELF::SHF_ALLOC,
85                                           0x4);
86  f_pGNUHashTab   = pBuilder.CreateSection(".gnu.hash",
87                                           LDFileFormat::NamePool,
88                                           llvm::ELF::SHT_GNU_HASH,
89                                           llvm::ELF::SHF_ALLOC,
90                                           pBitClass / 8);
91}
92