mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +00:00
8b67f774e9
direct inclusion edge from System to Support. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85086 91177308-0d34-0410-b5e6-96231b3b80d8
71 lines
2.8 KiB
C++
71 lines
2.8 KiB
C++
//===- MemoryObject.h - Abstract memory interface ---------------*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef MEMORYOBJECT_H
|
|
#define MEMORYOBJECT_H
|
|
|
|
#include "llvm/System/DataTypes.h"
|
|
|
|
namespace llvm {
|
|
|
|
/// MemoryObject - Abstract base class for contiguous addressable memory.
|
|
/// Necessary for cases in which the memory is in another process, in a
|
|
/// file, or on a remote machine.
|
|
/// All size and offset parameters are uint64_ts, to allow 32-bit processes
|
|
/// access to 64-bit address spaces.
|
|
class MemoryObject {
|
|
public:
|
|
/// Destructor - Override as necessary.
|
|
virtual ~MemoryObject();
|
|
|
|
/// getBase - Returns the lowest valid address in the region.
|
|
///
|
|
/// @result - The lowest valid address.
|
|
virtual uint64_t getBase() const = 0;
|
|
|
|
/// getExtent - Returns the size of the region in bytes. (The region is
|
|
/// contiguous, so the highest valid address of the region
|
|
/// is getBase() + getExtent() - 1).
|
|
///
|
|
/// @result - The size of the region.
|
|
virtual uint64_t getExtent() const = 0;
|
|
|
|
/// readByte - Tries to read a single byte from the region.
|
|
///
|
|
/// @param address - The address of the byte, in the same space as getBase().
|
|
/// @param ptr - A pointer to a byte to be filled in. Must be non-NULL.
|
|
/// @result - 0 if successful; -1 if not. Failure may be due to a
|
|
/// bounds violation or an implementation-specific error.
|
|
virtual int readByte(uint64_t address, uint8_t* ptr) const = 0;
|
|
|
|
/// readBytes - Tries to read a contiguous range of bytes from the
|
|
/// region, up to the end of the region.
|
|
/// You should override this function if there is a quicker
|
|
/// way than going back and forth with individual bytes.
|
|
///
|
|
/// @param address - The address of the first byte, in the same space as
|
|
/// getBase().
|
|
/// @param size - The maximum number of bytes to copy.
|
|
/// @param buf - A pointer to a buffer to be filled in. Must be non-NULL
|
|
/// and large enough to hold size bytes.
|
|
/// @param copied - A pointer to a nunber that is filled in with the number
|
|
/// of bytes actually read. May be NULL.
|
|
/// @result - 0 if successful; -1 if not. Failure may be due to a
|
|
/// bounds violation or an implementation-specific error.
|
|
virtual int readBytes(uint64_t address,
|
|
uint64_t size,
|
|
uint8_t* buf,
|
|
uint64_t* copied) const;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|
|
|