mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-25 16:29:20 +00:00
76463fdeb6
ELF and MachO implementations of RuntimeDyldImpl go into their own header files now. Reviewed on llvm-commits git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148652 91177308-0d34-0410-b5e6-96231b3b80d8
112 lines
3.4 KiB
C++
112 lines
3.4 KiB
C++
//===-- RuntimeDyldImpl.h - Run-time dynamic linker for MC-JIT --*- C++ -*-===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Interface for the implementations of runtime dynamic linker facilities.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef LLVM_RUNTIME_DYLD_IMPL_H
|
|
#define LLVM_RUNTIME_DYLD_IMPL_H
|
|
|
|
#include "llvm/ExecutionEngine/RuntimeDyld.h"
|
|
#include "llvm/ADT/DenseMap.h"
|
|
#include "llvm/ADT/StringMap.h"
|
|
#include "llvm/ADT/Twine.h"
|
|
#include "llvm/ADT/SmallVector.h"
|
|
#include "llvm/ExecutionEngine/ExecutionEngine.h"
|
|
#include "llvm/Support/Memory.h"
|
|
#include "llvm/Support/MemoryBuffer.h"
|
|
#include "llvm/Support/system_error.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include "llvm/Support/Debug.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
|
|
using namespace llvm;
|
|
|
|
namespace llvm {
|
|
class RuntimeDyldImpl {
|
|
protected:
|
|
unsigned CPUType;
|
|
unsigned CPUSubtype;
|
|
|
|
// The MemoryManager to load objects into.
|
|
RTDyldMemoryManager *MemMgr;
|
|
|
|
// For each section, we have a MemoryBlock of it's data.
|
|
// Indexed by SectionID.
|
|
SmallVector<sys::MemoryBlock, 32> Sections;
|
|
// For each section, the address it will be considered to live at for
|
|
// relocations. The same as the pointer to the above memory block for hosted
|
|
// JITs. Indexed by SectionID.
|
|
SmallVector<uint64_t, 32> SectionLoadAddress;
|
|
|
|
// Keep a map of starting local address to the SectionID which references it.
|
|
// Lookup function for when we assign virtual addresses.
|
|
DenseMap<void *, unsigned> SectionLocalMemToID;
|
|
|
|
// Master symbol table. As modules are loaded and external symbols are
|
|
// resolved, their addresses are stored here as a SectionID/Offset pair.
|
|
typedef std::pair<unsigned, uint64_t> SymbolLoc;
|
|
StringMap<SymbolLoc> SymbolTable;
|
|
|
|
bool HasError;
|
|
std::string ErrorStr;
|
|
|
|
// Set the error state and record an error string.
|
|
bool Error(const Twine &Msg) {
|
|
ErrorStr = Msg.str();
|
|
HasError = true;
|
|
return true;
|
|
}
|
|
|
|
uint8_t *getSectionAddress(unsigned SectionID) {
|
|
return (uint8_t*)Sections[SectionID].base();
|
|
}
|
|
void extractFunction(StringRef Name, uint8_t *StartAddress,
|
|
uint8_t *EndAddress);
|
|
|
|
public:
|
|
RuntimeDyldImpl(RTDyldMemoryManager *mm) : MemMgr(mm), HasError(false) {}
|
|
|
|
virtual ~RuntimeDyldImpl();
|
|
|
|
virtual bool loadObject(MemoryBuffer *InputBuffer) = 0;
|
|
|
|
void *getSymbolAddress(StringRef Name) {
|
|
// FIXME: Just look up as a function for now. Overly simple of course.
|
|
// Work in progress.
|
|
if (SymbolTable.find(Name) == SymbolTable.end())
|
|
return 0;
|
|
SymbolLoc Loc = SymbolTable.lookup(Name);
|
|
return getSectionAddress(Loc.first) + Loc.second;
|
|
}
|
|
|
|
virtual void resolveRelocations();
|
|
|
|
virtual void reassignSectionAddress(unsigned SectionID, uint64_t Addr) = 0;
|
|
|
|
void mapSectionAddress(void *LocalAddress, uint64_t TargetAddress);
|
|
|
|
// Is the linker in an error state?
|
|
bool hasError() { return HasError; }
|
|
|
|
// Mark the error condition as handled and continue.
|
|
void clearError() { HasError = false; }
|
|
|
|
// Get the error message.
|
|
StringRef getErrorString() { return ErrorStr; }
|
|
|
|
virtual bool isCompatibleFormat(const MemoryBuffer *InputBuffer) const = 0;
|
|
};
|
|
|
|
} // end namespace llvm
|
|
|
|
|
|
#endif
|