1//===- ELFSectionMap.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/Support/MsgHandling.h>
10#include <mcld/LD/ELFSectionMap.h>
11
12using namespace mcld;
13
14struct NameMap {
15  const char* from;
16  const char* to;
17};
18
19// Common mappings of ELF and other formants. Now only ELF specific mappings
20// are added
21static const NameMap map[] =
22{
23  {".text", ".text"},
24  {".rodata", ".rodata"},
25  {".data.rel.ro.local", ".data.rel.ro.local"},
26  {".data.rel.ro", ".data.rel.ro"},
27  {".data", ".data"},
28  {".bss", ".bss"},
29  {".tdata", ".tdata"},
30  {".tbss", ".tbss"},
31  {".init_array", ".init_array"},
32  {".fini_array", ".fini_array"},
33  // TODO: Support DT_INIT_ARRAY for all constructors?
34  {".ctors", ".ctors"},
35  {".dtors", ".dtors"},
36  {".sdata", ".sdata"},
37  {".sbss", ".sbss"},
38  // FIXME: in GNU ld, if we are creating a shared object .sdata2 and .sbss2
39  // sections would be handled differently.
40  {".sdata2", ".sdata"},
41  {".sbss2", ".sbss"},
42  {".lrodata", ".lrodata"},
43  {".ldata", ".ldata"},
44  {".lbss", ".lbss"},
45  {".gcc_except_table", ".gcc_except_table"},
46  {".gnu.linkonce.d.rel.ro.local", ".data.rel.ro.local"},
47  {".gnu.linkonce.d.rel.ro", ".data.rel.ro"},
48  {".gnu.linkonce.t", ".text"},
49  {".gnu.linkonce.r", ".rodata"},
50  {".gnu.linkonce.d", ".data"},
51  {".gnu.linkonce.b", ".bss"},
52  {".gnu.linkonce.s", ".sdata"},
53  {".gnu.linkonce.sb", ".sbss"},
54  {".gnu.linkonce.s2", ".sdata"},
55  {".gnu.linkonce.sb2", ".sbss"},
56  {".gnu.linkonce.wi", ".debug_info"},
57  {".gnu.linkonce.td", ".tdata"},
58  {".gnu.linkonce.tb", ".tbss"},
59  {".gnu.linkonce.lr", ".lrodata"},
60  {".gnu.linkonce.l", ".ldata"},
61  {".gnu.linkonce.lb", ".lbss"},
62};
63
64static const int map_size = (sizeof(map) / sizeof(map[0]));
65
66ELFSectionMap::ELFSectionMap()
67{
68}
69
70ELFSectionMap::~ELFSectionMap()
71{
72}
73
74void ELFSectionMap::initStandardMaps()
75{
76  for (unsigned int i = 0; i < map_size; ++i) {
77    bool exist = false;
78    NamePair& pair = append(map[i].from, map[i].to, exist);
79    if (exist) {
80      warning(diag::warn_duplicate_std_sectmap) << map[i].from
81                                                << map[i].to
82                                                << pair.from
83                                                << pair.to;
84    }
85  }
86}
87
88