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MC CFG: Add MCObjectDisassembler support for entrypoint + static ctors.

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For now, this isn't implemented for any format.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188882 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Ahmed Bougacha
2013-08-21 07:28:29 +00:00
parent aeb2bbcb6d
commit 0a30cccd49
2 changed files with 73 additions and 6 deletions
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28
include/llvm/MC/MCObjectDisassembler.h
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@ -15,6 +15,10 @@
#ifndef LLVM_MC_MCOBJECTDISASSEMBLER_H
#define LLVM_MC_MCOBJECTDISASSEMBLER_H
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/DataTypes.h"
namespace llvm {
namespace object {
@ -33,14 +37,11 @@ class MCModule;
/// It can also be used to create a control flow graph consisting of MCFunctions
/// and MCBasicBlocks.
class MCObjectDisassembler {
const object::ObjectFile &Obj;
const MCDisassembler &Dis;
const MCInstrAnalysis &MIA;
public:
MCObjectDisassembler(const object::ObjectFile &Obj,
const MCDisassembler &Dis,
const MCInstrAnalysis &MIA);
virtual ~MCObjectDisassembler() {}
/// \brief Build an MCModule, creating atoms and optionally functions.
/// \param withCFG Also build a CFG by adding MCFunctions to the Module.
@ -50,6 +51,25 @@ public:
/// block atoms, which then each back an MCBasicBlock.
MCModule *buildModule(bool withCFG = false);
MCModule *buildEmptyModule();
/// \brief Get the effective address of the entrypoint, or 0 if there is none.
virtual uint64_t getEntrypoint();
/// \name Get the addresses of static constructors/destructors in the object.
/// The caller is expected to know how to interpret the addresses;
/// for example, Mach-O init functions expect 5 arguments, not for ELF.
/// The addresses are original object file load addresses, not effective.
/// @{
virtual ArrayRef<uint64_t> getStaticInitFunctions();
virtual ArrayRef<uint64_t> getStaticExitFunctions();
/// @}
protected:
const object::ObjectFile &Obj;
const MCDisassembler &Dis;
const MCInstrAnalysis &MIA;
private:
/// \brief Fill \p Module by creating an atom for each section.
/// This could be made much smarter, using information like symbols, but also