#define DEBUG_TYPE "dyld"
#include "RuntimeDyldImpl.h"
#include "RuntimeDyldELF.h"
#include "RuntimeDyldMachO.h"
#include "llvm/Support/Path.h"
using namespace llvm;
using namespace llvm::object;
RTDyldMemoryManager::~RTDyldMemoryManager() {}
RuntimeDyldImpl::~RuntimeDyldImpl() {}
namespace llvm {
void RuntimeDyldImpl::extractFunction(StringRef Name, uint8_t *StartAddress,
uint8_t *EndAddress) {
uintptr_t Size = EndAddress - StartAddress + 1;
uintptr_t AllocSize = Size;
uint8_t *Mem = MemMgr->startFunctionBody(Name.data(), AllocSize);
assert(Size >= (uint64_t)(EndAddress - StartAddress + 1) &&
"Memory manager failed to allocate enough memory!");
memcpy(Mem, StartAddress, Size);
MemMgr->endFunctionBody(Name.data(), Mem, Mem + Size);
unsigned SectionID = Sections.size();
Sections.push_back(sys::MemoryBlock(Mem, Size));
SymbolTable[Name] = SymbolLoc(SectionID, 0);
DEBUG(dbgs() << " allocated to [" << Mem << ", " << Mem + Size << "]\n");
}
void RuntimeDyldImpl::resolveRelocations() {
for (int i = 0, e = Sections.size(); i != e; ++i) {
reassignSectionAddress(i, SectionLoadAddress[i]);
}
}
void RuntimeDyldImpl::mapSectionAddress(void *LocalAddress,
uint64_t TargetAddress) {
assert(SectionLocalMemToID.count(LocalAddress) &&
"Attempting to remap address of unknown section!");
unsigned SectionID = SectionLocalMemToID[LocalAddress];
reassignSectionAddress(SectionID, TargetAddress);
}
RuntimeDyld::RuntimeDyld(RTDyldMemoryManager *mm) {
Dyld = 0;
MM = mm;
}
RuntimeDyld::~RuntimeDyld() {
delete Dyld;
}
bool RuntimeDyld::loadObject(MemoryBuffer *InputBuffer) {
if (!Dyld) {
sys::LLVMFileType type = sys::IdentifyFileType(
InputBuffer->getBufferStart(),
static_cast<unsigned>(InputBuffer->getBufferSize()));
switch (type) {
case sys::ELF_Relocatable_FileType:
case sys::ELF_Executable_FileType:
case sys::ELF_SharedObject_FileType:
case sys::ELF_Core_FileType:
Dyld = new RuntimeDyldELF(MM);
break;
case sys::Mach_O_Object_FileType:
case sys::Mach_O_Executable_FileType:
case sys::Mach_O_FixedVirtualMemorySharedLib_FileType:
case sys::Mach_O_Core_FileType:
case sys::Mach_O_PreloadExecutable_FileType:
case sys::Mach_O_DynamicallyLinkedSharedLib_FileType:
case sys::Mach_O_DynamicLinker_FileType:
case sys::Mach_O_Bundle_FileType:
case sys::Mach_O_DynamicallyLinkedSharedLibStub_FileType:
case sys::Mach_O_DSYMCompanion_FileType:
Dyld = new RuntimeDyldMachO(MM);
break;
case sys::Unknown_FileType:
case sys::Bitcode_FileType:
case sys::Archive_FileType:
case sys::COFF_FileType:
report_fatal_error("Incompatible object format!");
}
} else {
if (!Dyld->isCompatibleFormat(InputBuffer))
report_fatal_error("Incompatible object format!");
}
return Dyld->loadObject(InputBuffer);
}
void *RuntimeDyld::getSymbolAddress(StringRef Name) {
return Dyld->getSymbolAddress(Name);
}
void RuntimeDyld::resolveRelocations() {
Dyld->resolveRelocations();
}
void RuntimeDyld::reassignSectionAddress(unsigned SectionID,
uint64_t Addr) {
Dyld->reassignSectionAddress(SectionID, Addr);
}
void RuntimeDyld::mapSectionAddress(void *LocalAddress,
uint64_t TargetAddress) {
Dyld->mapSectionAddress(LocalAddress, TargetAddress);
}
StringRef RuntimeDyld::getErrorString() {
return Dyld->getErrorString();
}
}