[SharedCache] Support loading iOS shared caches older than 11

Still need to fix branch island images not being picked up

2 files changed, 30 insertions, 22 deletions

diff --git a/docs/guide/sharedcache.md b/docs/guide/sharedcache.md
index 979af70d..2f3a6eb1 100644
--- a/docs/guide/sharedcache.md
+++ b/docs/guide/sharedcache.md
@@ -9,11 +9,15 @@ Our support for `dyld_shared_cache` is largely open source. The supporting code
 
 List of supported features for the given shared cache targets:
 
-| Platform | Arch   | Versions | Features                    |
-|----------|--------|----------|-----------------------------|
-| macOS    | x86_64 | 11 - 15  | Core, Objective-C, Workflow |
-| macOS    | arm64  | 11 - 15  | Core, Objective-C, Workflow |
-| iOS      | arm64  | 11 - 18  | Core, Objective-C, Workflow |
+| Platform | Arch   | Versions | Features                          | Notes                          |
+|----------|--------|----------|-----------------------------------|--------------------------------|
+| macOS    | x86_64 | 11 - 15  | Core, Objective-C, Workflow       |                                |
+| macOS    | arm64  | 11 - 15  | Core, Objective-C, Workflow       |                                |
+| iOS      | arm64  | 11 - 18  | Core, Objective-C, Workflow       |                                |
+| iOS      | arm64  | 10       | Core, _~Objective-C_, Workflow    | Some objective-c parsing fails |
+| iOS      | arm64  | 7 - 9    | _~Core_, _~Objective-C_, Workflow | Missing slide info adjustments |
+
+> Features marked with **~** are partially supported and non-critical issues can occur.
 
 - **Core**: Core functionality, such as loading, navigating, and analyzing `dyld_shared_cache` files.
 - **Objective-C**: Support for analyzing Objective-C information and symbols within the shared cache.
diff --git a/view/sharedcache/core/SharedCacheView.cpp b/view/sharedcache/core/SharedCacheView.cpp
index 0cd4d82e..77f6e633 100644
--- a/view/sharedcache/core/SharedCacheView.cpp
+++ b/view/sharedcache/core/SharedCacheView.cpp
@@ -176,11 +176,27 @@ bool SharedCacheView::Init()
 	m_logger = new Logger("SharedCache.View", GetFile()->GetSessionId());
 
 	uint32_t platform;
+	// NOTE: This entry only exists on ios 11 and later, older versions will just assume iOS.
 	GetParentView()->Read(&platform, 0xd8, 4);
 	char magic[17];
 	GetParentView()->Read(&magic, 0, 16);
 	magic[16] = 0;
 
+	if (std::string(magic) == "dyld_v1   arm64" || std::string(magic) == "dyld_v1  arm64e"
+		|| std::string(magic) == "dyld_v1arm64_32")
+	{
+		arch = "aarch64";
+	}
+	else if (std::string(magic) == "dyld_v1  x86_64" || std::string(magic) == "dyld_v1 x86_64h")
+	{
+		arch = "x86_64";
+	}
+	else
+	{
+		m_logger->LogError("Unknown magic: %s", magic);
+		return false;
+	}
+
 	// TODO: Do we want to add any warnings about platform support here?
 	// TODO: Do we still consider macos experimental?
 	switch (platform)
@@ -200,24 +216,12 @@ bool SharedCacheView::Init()
 	case DSCPlatformWatchOS:
 	case DSCPlatformWatchOSSimulator:
 	case DSCPlatformBridgeOS:
-	default:
-		m_logger->LogError("Unknown platform: %d", platform);
-		return false;
-	}
-
-	if (std::string(magic) == "dyld_v1   arm64" || std::string(magic) == "dyld_v1  arm64e"
-		|| std::string(magic) == "dyld_v1arm64_32")
-	{
-		arch = "aarch64";
-	}
-	else if (std::string(magic) == "dyld_v1  x86_64" || std::string(magic) == "dyld_v1 x86_64h")
-	{
-		arch = "x86_64";
-	}
-	else
-	{
-		m_logger->LogError("Unknown magic: %s", magic);
+		m_logger->LogError("Unsupported platform: %d", platform);
 		return false;
+	default:
+		m_logger->LogWarn("Unknown platform: %d selecting iOS...", platform);
+		os = "ios";
+		break;
 	}
 
 	SetDefaultPlatform(Platform::GetByName(os + "-" + arch));