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#pragma once
#include <binaryninjaapi.h>
#include <objectivec/objc.h>
#include "SharedCache.h"
struct ObjCOptimizationHeader
{
uint32_t version;
uint32_t flags;
uint64_t headerInfoROCacheOffset;
uint64_t headerInfoRWCacheOffset;
uint64_t selectorHashTableCacheOffset;
uint64_t classHashTableCacheOffset;
uint64_t protocolHashTableCacheOffset;
uint64_t relativeMethodSelectorBaseAddressOffset;
};
// `objc_opt_t` from dyld/include/objc-shared-cache.h
struct LegacyObjCOptimizationHeader
{
uint32_t version;
uint32_t flags;
int32_t selopt_offset;
int32_t headeropt_ro_offset;
int32_t unused_clsopt_offset;
int32_t unused_protocolopt_offset;
int32_t headeropt_rw_offset;
int32_t unused_protocolopt2_offset;
int32_t largeSharedCachesClassOffset;
int32_t largeSharedCachesProtocolOffset;
int64_t relativeMethodSelectorBaseAddressOffset;
};
namespace DSCObjC {
class SharedCacheObjCReader : public BinaryNinja::ObjCReader
{
VirtualMemoryReader m_reader;
public:
void Read(void* dest, size_t len) override;
std::string ReadCString(size_t maxLength = -1) override;
uint8_t Read8() override;
uint16_t Read16() override;
uint32_t Read32() override;
uint64_t Read64() override;
int8_t ReadS8() override;
int16_t ReadS16() override;
int32_t ReadS32() override;
int64_t ReadS64() override;
uint64_t ReadPointer() override;
uint64_t GetOffset() const override;
void Seek(uint64_t offset) override;
void SeekRelative(int64_t offset) override;
VirtualMemoryReader& GetVMReader();
SharedCacheObjCReader(VirtualMemoryReader reader);
};
class SharedCacheObjCProcessor : public BinaryNinja::ObjCProcessor
{
std::optional<uint64_t> m_customRelativeMethodSelectorBase = std::nullopt;
uint64_t m_imageAddress;
std::shared_ptr<BinaryNinja::ObjCReader> GetReader() override;
void GetRelativeMethod(BinaryNinja::ObjCReader* reader, BinaryNinja::method_t& meth) override;
BinaryNinja::Ref<BinaryNinja::Symbol> GetSymbol(uint64_t address) override;
BinaryNinja::Ref<BinaryNinja::Section> GetSectionWithName(const char *sectionName) override;
public:
SharedCacheObjCProcessor(BinaryNinja::BinaryView* data, uint64_t imageAddress);
uint64_t GetObjCRelativeMethodBaseAddress(BinaryNinja::ObjCReader* reader) override;
};
} // namespace DSCObjC
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