[SharedCache] Refactor Shared Cache

In absence of a better name, this commit refactors the shared cache code.

1 files changed, 42 insertions, 0 deletions

diff --git a/view/sharedcache/core/SlideInfo.h b/view/sharedcache/core/SlideInfo.h
new file mode 100644
index 00000000..bc165589
--- /dev/null
+++ b/view/sharedcache/core/SlideInfo.h
@@ -0,0 +1,42 @@
+#pragma once
+
+#include "binaryninjaapi.h"
+#include "SharedCache.h"
+
+// Information required to apply slide (relocation) info to a mapping
+struct SlideMappingInfo
+{
+	dyld_cache_mapping_info mappingInfo;
+	// NOTE: Offset is relative to the beginning of the entry file.
+	uint64_t address;
+	uint16_t slideInfoVersion;
+
+	union
+	{
+		dyld_cache_slide_info_v2 slideInfoV2;
+		dyld_cache_slide_info_v3 slideInfoV3;
+		dyld_cache_slide_info_v5 slideInfoV5;
+	};
+};
+
+// Current usages of the slide info are:
+// - Reading export symbols requires slide info to be processed.
+// - Reading objc stuff
+// - Loading an image or region
+// - Reading branch island mappings????
+class SlideInfoProcessor
+{
+	BinaryNinja::Ref<BinaryNinja::Logger> m_logger;
+	// Base address of the shared cache, NOT the base address of the entry.
+	uint64_t m_baseAddress;
+
+public:
+	explicit SlideInfoProcessor(uint64_t baseAddress);
+
+	std::vector<SlideMappingInfo> ReadEntryInfo(VirtualMemory& vm, const CacheEntry& entry) const;
+
+	// Write the slide information back to the entries memory mapped regions.
+	void ApplyMappings(VirtualMemory& vm, const std::vector<SlideMappingInfo>& mappings);
+
+	void ProcessEntry(VirtualMemory& vm, const CacheEntry& entry);
+};