X86Emulation.cpp revision d0fbbb227051be16931a1aa9b4a7722ac039c698 
1//===- X86Emulation.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 "X86.h"
10#include <mcld/LinkerConfig.h>
11#include <mcld/Target/ELFEmulation.h>
12#include <mcld/Support/TargetRegistry.h>
13
14namespace mcld {
15
16static bool MCLDEmulateX86ELF(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  return true;
35}
36
37//===----------------------------------------------------------------------===//
38// emulateX86LD - the help function to emulate X86 ld
39//===----------------------------------------------------------------------===//
40bool emulateX86LD(const std::string& pTriple, LinkerConfig& pConfig)
41{
42  llvm::Triple theTriple(pTriple);
43  if (theTriple.isOSDarwin()) {
44    assert(0 && "MachO linker has not supported yet");
45    return false;
46  }
47  if (theTriple.isOSWindows()) {
48    assert(0 && "COFF linker has not supported yet");
49    return false;
50  }
51
52  return MCLDEmulateX86ELF(pConfig);
53}
54
55} // namespace of mcld
56
57//===----------------------------------------------------------------------===//
58// X86Emulation
59//===----------------------------------------------------------------------===//
60extern "C" void MCLDInitializeX86Emulation() {
61  // Register the emulation
62  mcld::TargetRegistry::RegisterEmulation(mcld::TheX86Target, mcld::emulateX86LD);
63}
64
65