ARMEmulation.cpp revision 37b74a387bb3993387029859c2d9d051c41c724e 
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/LinkerScript.h"
12#include "mcld/Target/ELFEmulation.h"
13#include "mcld/Support/TargetRegistry.h"
14
15namespace mcld {
16
17static bool MCLDEmulateARMELF(LinkerScript& pScript, LinkerConfig& pConfig) {
18  if (!MCLDEmulateELF(pScript, 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.options().getScriptList().empty() &&
37      pConfig.codeGenType() != LinkerConfig::Object) {
38    pScript.sectionMap().insert(".ARM.exidx*", ".ARM.exidx");
39    pScript.sectionMap().insert(".ARM.extab*", ".ARM.extab");
40    pScript.sectionMap().insert(".ARM.attributes*", ".ARM.attributes");
41  }
42  return true;
43}
44
45//===----------------------------------------------------------------------===//
46// emulateARMLD - the help function to emulate ARM ld
47//===----------------------------------------------------------------------===//
48bool emulateARMLD(LinkerScript& pScript, LinkerConfig& pConfig) {
49  if (pConfig.targets().triple().isOSDarwin()) {
50    assert(0 && "MachO linker has not supported yet");
51    return false;
52  }
53  if (pConfig.targets().triple().isOSWindows()) {
54    assert(0 && "COFF linker has not supported yet");
55    return false;
56  }
57
58  return MCLDEmulateARMELF(pScript, pConfig);
59}
60
61}  // namespace mcld
62
63//===----------------------------------------------------------------------===//
64// ARMEmulation
65//===----------------------------------------------------------------------===//
66extern "C" void MCLDInitializeARMEmulation() {
67  // Register the emulation
68  mcld::TargetRegistry::RegisterEmulation(mcld::TheARMTarget,
69                                          mcld::emulateARMLD);
70  mcld::TargetRegistry::RegisterEmulation(mcld::TheThumbTarget,
71                                          mcld::emulateARMLD);
72}
73