1//===- MipsJITInfo.h - Mips Implementation of the JIT Interface -*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This file contains the declaration of the MipsJITInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef MIPSJITINFO_H
15#define MIPSJITINFO_H
16
17#include "MipsMachineFunction.h"
18#include "llvm/CodeGen/MachineConstantPool.h"
19#include "llvm/CodeGen/MachineFunction.h"
20#include "llvm/CodeGen/MachineJumpTableInfo.h"
21#include "llvm/Target/TargetJITInfo.h"
22
23namespace llvm {
24class MipsTargetMachine;
25
26class MipsJITInfo : public TargetJITInfo {
27
28  bool IsPIC;
29  bool IsLittleEndian;
30
31  public:
32    explicit MipsJITInfo() :
33      IsPIC(false), IsLittleEndian(true) {}
34
35    /// replaceMachineCodeForFunction - Make it so that calling the function
36    /// whose machine code is at OLD turns into a call to NEW, perhaps by
37    /// overwriting OLD with a branch to NEW.  This is used for self-modifying
38    /// code.
39    ///
40    void replaceMachineCodeForFunction(void *Old, void *New) override;
41
42    // getStubLayout - Returns the size and alignment of the largest call stub
43    // on Mips.
44    StubLayout getStubLayout() override;
45
46    /// emitFunctionStub - Use the specified JITCodeEmitter object to emit a
47    /// small native function that simply calls the function at the specified
48    /// address.
49    void *emitFunctionStub(const Function *F, void *Fn,
50                           JITCodeEmitter &JCE) override;
51
52    /// getLazyResolverFunction - Expose the lazy resolver to the JIT.
53    LazyResolverFn getLazyResolverFunction(JITCompilerFn) override;
54
55    /// relocate - Before the JIT can run a block of code that has been emitted,
56    /// it must rewrite the code to contain the actual addresses of any
57    /// referenced global symbols.
58    void relocate(void *Function, MachineRelocation *MR,
59                  unsigned NumRelocs, unsigned char *GOTBase) override;
60
61    /// Initialize - Initialize internal stage for the function being JITted.
62    void Initialize(const MachineFunction &MF, bool isPIC,
63                    bool isLittleEndian) {
64      IsPIC = isPIC;
65      IsLittleEndian = isLittleEndian;
66    }
67
68};
69}
70
71#endif
72