Function ApplySlideInfoV3

view/sharedcache/core/SlideInfo.cpp:48–86

}

void ApplySlideInfoV3(MappedFileAccessor& accessor, const SlideMappingInfo& mapping)
{
	uint64_t pageStartsOffset = mapping.address + sizeof(dyld_cache_slide_info_v3);
	uint64_t pageStartCount = mapping.slideInfoV3.page_starts_count;
	uint64_t pageSize = mapping.slideInfoV3.page_size;

	auto cursor = pageStartsOffset;
	for (size_t i = 0; i < pageStartCount; i++)
	{
		uint16_t delta = accessor.ReadUInt16(cursor);
		cursor += sizeof(uint16_t);
		if (delta == DYLD_CACHE_SLIDE_V3_PAGE_ATTR_NO_REBASE)
			continue;

		delta = delta / sizeof(uint64_t);  // initial offset is byte based
		uint64_t loc = mapping.mappingInfo.fileOffset + (pageSize * i);
		do
		{
			loc += delta * sizeof(dyld_cache_slide_pointer3);
			dyld_cache_slide_pointer3 slideInfo = {accessor.ReadUInt64(loc)};
			delta = slideInfo.plain.offsetToNextPointer;

			if (slideInfo.auth.authenticated)
			{
				uint64_t value = slideInfo.auth.offsetFromSharedCacheBase;
				value += mapping.slideInfoV3.auth_value_add;
				accessor.WritePointer(loc, value);
			}
			else
			{
				uint64_t value51 = slideInfo.plain.pointerValue;
				uint64_t top8Bits = value51 & 0x0007F80000000000;
				uint64_t bottom43Bits = value51 & 0x000007FFFFFFFFFF;
				uint64_t value = (uint64_t)top8Bits << 13 | bottom43Bits;
				accessor.WritePointer(loc, value);
			}
		} while (delta != 0);
	}
}

void ApplySlideInfoV2(MappedFileAccessor& accessor, const SlideMappingInfo& mapping)
{