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Chris Lattner833c3c22003-12-20 01:22:19 +00001//===- X86JITInfo.h - X86 implementation of the JIT interface --*- C++ -*-===//
Misha Brukmanc88330a2005-04-21 23:38:14 +00002//
Chris Lattner833c3c22003-12-20 01:22:19 +00003// The LLVM Compiler Infrastructure
4//
Chris Lattnerf3ebc3f2007-12-29 20:36:04 +00005// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
Misha Brukmanc88330a2005-04-21 23:38:14 +00007//
Chris Lattner833c3c22003-12-20 01:22:19 +00008//===----------------------------------------------------------------------===//
9//
10// This file contains the X86 implementation of the TargetJITInfo class.
11//
12//===----------------------------------------------------------------------===//
13
14#ifndef X86JITINFO_H
15#define X86JITINFO_H
16
Nicolas Geoffraya7557df2008-04-16 20:46:05 +000017#include "llvm/Function.h"
Chris Lattner833c3c22003-12-20 01:22:19 +000018#include "llvm/Target/TargetJITInfo.h"
19
20namespace llvm {
Evan Cheng2dd2c652006-03-13 23:20:37 +000021 class X86TargetMachine;
Chris Lattnerc45a0332003-12-28 09:47:19 +000022
Chris Lattner833c3c22003-12-20 01:22:19 +000023 class X86JITInfo : public TargetJITInfo {
Evan Cheng2dd2c652006-03-13 23:20:37 +000024 X86TargetMachine &TM;
Evan Cheng0b773192008-12-10 02:32:19 +000025 uintptr_t PICBase;
Nicolas Geoffray5457ce92008-10-25 15:41:43 +000026 char* TLSOffset;
Chris Lattner833c3c22003-12-20 01:22:19 +000027 public:
Nicolas Geoffray5457ce92008-10-25 15:41:43 +000028 explicit X86JITInfo(X86TargetMachine &tm) : TM(tm) {
29 useGOT = 0;
30 TLSOffset = 0;
31 }
Chris Lattner833c3c22003-12-20 01:22:19 +000032
Chris Lattner833c3c22003-12-20 01:22:19 +000033 /// 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
36 /// code.
37 ///
Chris Lattner5d236002003-12-28 21:23:38 +000038 virtual void replaceMachineCodeForFunction(void *Old, void *New);
Misha Brukmanc88330a2005-04-21 23:38:14 +000039
Evan Cheng9f3058f2008-11-10 01:08:07 +000040 /// emitGlobalValueIndirectSym - Use the specified MachineCodeEmitter object
41 /// to emit an indirect symbol which contains the address of the specified
42 /// ptr.
43 virtual void *emitGlobalValueIndirectSym(const GlobalValue* GV, void *ptr,
44 MachineCodeEmitter &MCE);
Evan Cheng49ff8ec2008-01-04 10:46:51 +000045
Chris Lattner8c645ec2004-11-20 23:53:56 +000046 /// emitFunctionStub - Use the specified MachineCodeEmitter object to emit a
47 /// small native function that simply calls the function at the specified
48 /// address.
Nicolas Geoffraya7557df2008-04-16 20:46:05 +000049 virtual void *emitFunctionStub(const Function* F, void *Fn,
50 MachineCodeEmitter &MCE);
Chris Lattner8c645ec2004-11-20 23:53:56 +000051
Evan Cheng880b0802008-01-05 02:26:58 +000052 /// getPICJumpTableEntry - Returns the value of the jumptable entry for the
53 /// specific basic block.
Evan Cheng0b773192008-12-10 02:32:19 +000054 virtual uintptr_t getPICJumpTableEntry(uintptr_t BB, uintptr_t JTBase);
Evan Cheng880b0802008-01-05 02:26:58 +000055
Chris Lattner8c645ec2004-11-20 23:53:56 +000056 /// getLazyResolverFunction - Expose the lazy resolver to the JIT.
57 virtual LazyResolverFn getLazyResolverFunction(JITCompilerFn);
58
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,
Andrew Lenharth111e5e62005-07-22 20:49:37 +000063 unsigned NumRelocs, unsigned char* GOTBase);
Nicolas Geoffray5457ce92008-10-25 15:41:43 +000064
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);
Evan Cheng880b0802008-01-05 02:26:58 +000069
70 /// setPICBase / getPICBase - Getter / setter of PICBase, used to compute
71 /// PIC jumptable entry.
Evan Cheng0b773192008-12-10 02:32:19 +000072 void setPICBase(uintptr_t Base) { PICBase = Base; }
73 uintptr_t getPICBase() const { return PICBase; }
Chris Lattner833c3c22003-12-20 01:22:19 +000074 };
75}
76
77#endif