1 //===- ARMJITInfo.h - ARM implementation of the JIT interface --*- C++ -*-===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file contains the declaration of the ARMJITInfo class.
12 //===----------------------------------------------------------------------===//
17 #include "llvm/Target/TargetJITInfo.h"
21 class ARMTargetMachine;
23 class ARMJITInfo : public TargetJITInfo {
25 std::map<unsigned, intptr_t> CPIDtoAddressMap;
27 explicit ARMJITInfo(ARMTargetMachine &tm) : TM(tm) { useGOT = false; }
29 /// replaceMachineCodeForFunction - Make it so that calling the function
30 /// whose machine code is at OLD turns into a call to NEW, perhaps by
31 /// overwriting OLD with a branch to NEW. This is used for self-modifying
34 virtual void replaceMachineCodeForFunction(void *Old, void *New);
36 /// emitFunctionStub - Use the specified MachineCodeEmitter object to emit a
37 /// small native function that simply calls the function at the specified
39 virtual void *emitFunctionStub(const Function* F, void *Fn,
40 MachineCodeEmitter &MCE);
42 /// getLazyResolverFunction - Expose the lazy resolver to the JIT.
43 virtual LazyResolverFn getLazyResolverFunction(JITCompilerFn);
45 /// relocate - Before the JIT can run a block of code that has been emitted,
46 /// it must rewrite the code to contain the actual addresses of any
47 /// referenced global symbols.
48 virtual void relocate(void *Function, MachineRelocation *MR,
49 unsigned NumRelocs, unsigned char* GOTBase);
51 /// hasCustomConstantPool - Allows a target to specify that constant
52 /// pool address resolution is handled by the target.
53 virtual bool hasCustomConstantPool() const { return true; }
55 /// getCustomConstantPoolEntryAddress - The ARM target puts all constant
56 /// pool entries into constant islands. Resolve the constant pool index
57 /// into the address where the constant is stored.
58 virtual intptr_t getCustomConstantPoolEntryAddress(unsigned CPID) const
60 std::map<unsigned, intptr_t>::const_iterator elem;
61 elem = CPIDtoAddressMap.find(CPID);
62 assert (elem != CPIDtoAddressMap.end());
66 /// mapCPIDtoAddress - Map a Constant Pool Index (CPID) to the address
67 /// where its associated value is stored. When relocations are processed,
68 /// this value will be used to resolve references to the constant.
69 void mapCPIDtoAddress(unsigned CPID, intptr_t address)
70 { CPIDtoAddressMap[CPID] = address; }