mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-25 04:02:41 +01:00
136 lines
4.5 KiB
C++
136 lines
4.5 KiB
C++
//===- MCAsmLayout.h - Assembly Layout Object -------------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_MC_MCASMLAYOUT_H
|
|
#define LLVM_MC_MCASMLAYOUT_H
|
|
|
|
#include "llvm/ADT/SmallVector.h"
|
|
|
|
namespace llvm {
|
|
class MCAssembler;
|
|
class MCFragment;
|
|
class MCSectionData;
|
|
class MCSymbolData;
|
|
|
|
/// Encapsulates the layout of an assembly file at a particular point in time.
|
|
///
|
|
/// Assembly may requiring compute multiple layouts for a particular assembly
|
|
/// file as part of the relaxation process. This class encapsulates the layout
|
|
/// at a single point in time in such a way that it is always possible to
|
|
/// efficiently compute the exact addresses of any symbol in the assembly file,
|
|
/// even during the relaxation process.
|
|
class MCAsmLayout {
|
|
public:
|
|
typedef llvm::SmallVectorImpl<MCSectionData*>::const_iterator const_iterator;
|
|
typedef llvm::SmallVectorImpl<MCSectionData*>::iterator iterator;
|
|
|
|
private:
|
|
MCAssembler &Assembler;
|
|
|
|
/// List of sections in layout order.
|
|
llvm::SmallVector<MCSectionData*, 16> SectionOrder;
|
|
|
|
/// The last fragment which was layed out, or 0 if nothing has been layed
|
|
/// out. Fragments are always layed out in order, so all fragments with a
|
|
/// lower ordinal will be up to date.
|
|
mutable MCFragment *LastValidFragment;
|
|
|
|
/// \brief Make sure that the layout for the given fragment is valid, lazily
|
|
/// computing it if necessary.
|
|
void EnsureValid(const MCFragment *F) const;
|
|
|
|
bool isSectionUpToDate(const MCSectionData *SD) const;
|
|
bool isFragmentUpToDate(const MCFragment *F) const;
|
|
|
|
public:
|
|
MCAsmLayout(MCAssembler &_Assembler);
|
|
|
|
/// Get the assembler object this is a layout for.
|
|
MCAssembler &getAssembler() const { return Assembler; }
|
|
|
|
/// \brief Update the layout because a fragment has been resized. The
|
|
/// fragments size should have already been updated, the \arg SlideAmount is
|
|
/// the delta from the old size.
|
|
void UpdateForSlide(MCFragment *F, int SlideAmount);
|
|
|
|
/// \brief Update the layout because a fragment has been replaced.
|
|
void FragmentReplaced(MCFragment *Src, MCFragment *Dst);
|
|
|
|
/// \brief Perform a full layout.
|
|
void LayoutFile();
|
|
|
|
/// \brief Perform layout for a single fragment, assuming that the previous
|
|
/// fragment has already been layed out correctly, and the parent section has
|
|
/// been initialized.
|
|
void LayoutFragment(MCFragment *Fragment);
|
|
|
|
/// \brief Performs initial layout for a single section, assuming that the
|
|
/// previous section (including its fragments) has already been layed out
|
|
/// correctly.
|
|
void LayoutSection(MCSectionData *SD);
|
|
|
|
/// @name Section Access (in layout order)
|
|
/// @{
|
|
|
|
llvm::SmallVectorImpl<MCSectionData*> &getSectionOrder() {
|
|
return SectionOrder;
|
|
}
|
|
const llvm::SmallVectorImpl<MCSectionData*> &getSectionOrder() const {
|
|
return SectionOrder;
|
|
}
|
|
|
|
/// @}
|
|
/// @name Fragment Layout Data
|
|
/// @{
|
|
|
|
/// \brief Get the effective size of the given fragment, as computed in the
|
|
/// current layout.
|
|
uint64_t getFragmentEffectiveSize(const MCFragment *F) const;
|
|
|
|
/// \brief Get the offset of the given fragment inside its containing section.
|
|
uint64_t getFragmentOffset(const MCFragment *F) const;
|
|
|
|
/// @}
|
|
/// @name Section Layout Data
|
|
/// @{
|
|
|
|
/// \brief Get the computed address of the given section.
|
|
uint64_t getSectionAddress(const MCSectionData *SD) const;
|
|
|
|
/// @}
|
|
/// @name Utility Functions
|
|
/// @{
|
|
|
|
/// \brief Get the address of the given fragment, as computed in the current
|
|
/// layout.
|
|
uint64_t getFragmentAddress(const MCFragment *F) const;
|
|
|
|
/// \brief Get the address space size of the given section, as it effects
|
|
/// layout. This may differ from the size reported by \see getSectionSize() by
|
|
/// not including section tail padding.
|
|
uint64_t getSectionAddressSize(const MCSectionData *SD) const;
|
|
|
|
/// \brief Get the data size of the given section, as emitted to the object
|
|
/// file. This may include additional padding, or be 0 for virtual sections.
|
|
uint64_t getSectionFileSize(const MCSectionData *SD) const;
|
|
|
|
/// \brief Get the logical data size of the given section.
|
|
uint64_t getSectionSize(const MCSectionData *SD) const;
|
|
|
|
/// \brief Get the address of the given symbol, as computed in the current
|
|
/// layout.
|
|
uint64_t getSymbolAddress(const MCSymbolData *SD) const;
|
|
|
|
/// @}
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
#endif
|