1 //===- X86JITInfo.h - X86 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 X86 implementation of the TargetJITInfo class.
12 //===----------------------------------------------------------------------===//
17 #include "llvm/Function.h"
18 #include "llvm/Target/TargetJITInfo.h"
21 class X86TargetMachine;
23 class X86JITInfo : public TargetJITInfo {
28 explicit X86JITInfo(X86TargetMachine &tm) : TM(tm) {
33 /// replaceMachineCodeForFunction - Make it so that calling the function
34 /// whose machine code is at OLD turns into a call to NEW, perhaps by
35 /// overwriting OLD with a branch to NEW. This is used for self-modifying
38 virtual void replaceMachineCodeForFunction(void *Old, void *New);
40 /// emitGlobalValueIndirectSym - Use the specified MachineCodeEmitter object
41 /// to emit an indirect symbol which contains the address of the specified
43 virtual void *emitGlobalValueIndirectSym(const GlobalValue* GV, void *ptr,
44 MachineCodeEmitter &MCE);
46 /// emitFunctionStub - Use the specified MachineCodeEmitter object to emit a
47 /// small native function that simply calls the function at the specified
49 virtual void *emitFunctionStub(const Function* F, void *Fn,
50 MachineCodeEmitter &MCE);
52 /// getPICJumpTableEntry - Returns the value of the jumptable entry for the
53 /// specific basic block.
54 virtual uintptr_t getPICJumpTableEntry(uintptr_t BB, uintptr_t JTBase);
56 /// getLazyResolverFunction - Expose the lazy resolver to the JIT.
57 virtual LazyResolverFn getLazyResolverFunction(JITCompilerFn);
59 /// relocate - Before the JIT can run a block of code that has been emitted,
60 /// it must rewrite the code to contain the actual addresses of any
61 /// referenced global symbols.
62 virtual void relocate(void *Function, MachineRelocation *MR,
63 unsigned NumRelocs, unsigned char* GOTBase);
65 /// allocateThreadLocalMemory - Each target has its own way of
66 /// handling thread local variables. This method returns a value only
67 /// meaningful to the target.
68 virtual char* allocateThreadLocalMemory(size_t size);
70 /// setPICBase / getPICBase - Getter / setter of PICBase, used to compute
71 /// PIC jumptable entry.
72 void setPICBase(uintptr_t Base) { PICBase = Base; }
73 uintptr_t getPICBase() const { return PICBase; }