From fd1ac8a1cf3c05ccdbf8762e22e9b7f01bd2abd4 Mon Sep 17 00:00:00 2001
From: Brandon Miller <brandon@vector35.com>
Date: Wed, 2 Apr 2025 11:24:06 -0400
Subject: Fix user platform override between armv7 and thumb

Only override the default platform based on the entry point architecture
in cases where the user didn't explicitly set loader.platform
---
 view/macho/machoview.cpp | 14 +++++++++-----
 view/macho/machoview.h   |  3 ++-
 2 files changed, 11 insertions(+), 6 deletions(-)

(limited to 'view/macho')

diff --git a/view/macho/machoview.cpp b/view/macho/machoview.cpp
index 8a320545..4b932b5a 100644
--- a/view/macho/machoview.cpp
+++ b/view/macho/machoview.cpp
@@ -1093,6 +1093,7 @@ bool MachoView::Init()
 
 	SetOriginalImageBase(initialImageBase);
 	uint64_t preferredImageBase = initialImageBase;
+	bool platformSetByUser = false;
 	if (settings)
 	{
 		if (settings->Contains("loader.imageBase"))
@@ -1100,11 +1101,13 @@ bool MachoView::Init()
 
 		if (settings->Contains("loader.platform"))
 		{
-			Ref<Platform> platform = Platform::GetByName(settings->Get<string>("loader.platform", this));
+			BNSettingsScope scope = SettingsAutoScope;
+			Ref<Platform> platform = Platform::GetByName(settings->Get<string>("loader.platform", this, &scope));
 			if (platform)
 			{
 				m_plat = platform;
 				m_arch = platform->GetArchitecture();
+				platformSetByUser = (scope == SettingsResourceScope);
 			}
 		}
 	}
@@ -1528,12 +1531,12 @@ bool MachoView::Init()
 	Ref<Type> filesetEntryCommandType = Type::StructureType(filesetEntryCommandStruct);
 	m_typeNames.filesetEntryCommandQualName = DefineType(filesetEntryCommandTypeId, filesetEntryCommandName, filesetEntryCommandType);
 
-	if (!InitializeHeader(m_header, true, preferredImageBase, preferredImageBaseDesc))
+	if (!InitializeHeader(m_header, true, preferredImageBase, preferredImageBaseDesc, platformSetByUser))
 		return false;
 
 	for (auto& it : m_subHeaders)
 	{
-		if (!InitializeHeader(it.second, false, it.first, ""))
+		if (!InitializeHeader(it.second, false, it.first, "", platformSetByUser))
 			return false;
 	}
 
@@ -1544,7 +1547,8 @@ bool MachoView::Init()
 }
 
 
-bool MachoView::InitializeHeader(MachOHeader& header, bool isMainHeader, uint64_t preferredImageBase, std::string preferredImageBaseDesc)
+bool MachoView::InitializeHeader(MachOHeader& header, bool isMainHeader, uint64_t preferredImageBase,
+	std::string preferredImageBaseDesc, bool platformSetByUser)
 {
 	Ref<Settings> settings = GetLoadSettings(GetTypeName());
 
@@ -1814,7 +1818,7 @@ bool MachoView::InitializeHeader(MachOHeader& header, bool isMainHeader, uint64_
 		if (!platform)
 			platform = m_arch->GetStandalonePlatform();
 
-		if (header.m_entryPoints.size() > 0)
+		if (header.m_entryPoints.size() > 0 && !platformSetByUser)
 			platform = platform->GetAssociatedPlatformByAddress(header.m_entryPoints[0]);
 
 		SetDefaultPlatform(platform);
diff --git a/view/macho/machoview.h b/view/macho/machoview.h
index 11a17bff..787ae36b 100644
--- a/view/macho/machoview.h
+++ b/view/macho/machoview.h
@@ -1472,7 +1472,8 @@ namespace BinaryNinja
 		std::vector<section_64> m_allSections;
 
 		MachOHeader HeaderForAddress(BinaryView* data, uint64_t address, bool isMainHeader, std::string identifierPrefix = "");
-		bool InitializeHeader(MachOHeader& header, bool isMainHeader, uint64_t preferredImageBase, std::string preferredImageBaseDesc);
+		bool InitializeHeader(MachOHeader& header, bool isMainHeader, uint64_t preferredImageBase,
+			std::string preferredImageBaseDesc, bool platformSetByUser);
 
 		void RebaseThreadStarts(BinaryReader& virtualReader, std::vector<uint32_t>& threadStarts, uint64_t stepMultiplier);
 		Ref<Symbol> DefineMachoSymbol(
-- 
cgit v1.3.1