ARMEmulation.cpp revision d0fbbb227051be16931a1aa9b4a7722ac039c698 
1//===- ARMEmulation.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 "ARM.h"
10#include <mcld/LinkerConfig.h>
11#include <mcld/Target/ELFEmulation.h>
12#include <mcld/Support/TargetRegistry.h>
13
14namespace mcld {
15
16static bool MCLDEmulateARMELF(LinkerConfig& pConfig)
17{
18  if (!MCLDEmulateELF(pConfig))
19    return false;
20
21  // set up bitclass and endian
22  pConfig.targets().setEndian(TargetOptions::Little);
23  pConfig.targets().setBitClass(32);
24
25  // set up target-dependent constraints of attributes
26  pConfig.attribute().constraint().enableWholeArchive();
27  pConfig.attribute().constraint().enableAsNeeded();
28  pConfig.attribute().constraint().setSharedSystem();
29
30  // set up the predefined attributes
31  pConfig.attribute().predefined().unsetWholeArchive();
32  pConfig.attribute().predefined().unsetAsNeeded();
33  pConfig.attribute().predefined().setDynamic();
34
35  // set up section map
36  if (pConfig.codeGenType() != LinkerConfig::Object) {
37    bool exist = false;
38    pConfig.scripts().sectionMap().append(".ARM.exidx", ".ARM.exidx", exist);
39    pConfig.scripts().sectionMap().append(".ARM.extab", ".ARM.extab", exist);
40    pConfig.scripts().sectionMap().append(".ARM.attributes", ".ARM.attributes", exist);
41  }
42  return true;
43}
44
45//===----------------------------------------------------------------------===//
46// emulateARMLD - the help function to emulate ARM ld
47//===----------------------------------------------------------------------===//
48bool emulateARMLD(const std::string& pTriple, LinkerConfig& pConfig)
49{
50  llvm::Triple theTriple(pTriple);
51  if (theTriple.isOSDarwin()) {
52    assert(0 && "MachO linker has not supported yet");
53    return false;
54  }
55  if (theTriple.isOSWindows()) {
56    assert(0 && "COFF linker has not supported yet");
57    return false;
58  }
59
60  return MCLDEmulateARMELF(pConfig);
61}
62
63} // namespace of mcld
64
65//===----------------------------------------------------------------------===//
66// ARMEmulation
67//===----------------------------------------------------------------------===//
68extern "C" void MCLDInitializeARMEmulation() {
69  // Register the emulation
70  mcld::TargetRegistry::RegisterEmulation(mcld::TheARMTarget, mcld::emulateARMLD);
71  mcld::TargetRegistry::RegisterEmulation(mcld::TheThumbTarget, mcld::emulateARMLD);
72}
73
74