strip MH_DYLIB_IN_CACHE, disable header growth

thank you to @cgudrian for catching the MH_DYLIB_IN_CACHE flag issue, lldb should finally work now! also disable something which was causing a regression for the past couple versions
moraea · Sep 6, 2023 · 57415de · 57415de
1 parent e310907
commit 57415de
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Showing 3 changed files with 24 additions and 32 deletions.
diff --git a/Output.m b/Output.m
@@ -2,9 +2,12 @@
 #define IMPOSTOR_OBJC_OLD "dsce.objc.old"
 #define IMPOSTOR_GOT "dsce.got"
 #define IMPOSTOR_PAD "dsce.pad"
-#define HEADER_EXTRA 0x1000
 #define IMPORT_HACK_OFFSET 0x1000000000
 
+// TODO: broken currently
+
+#define HEADER_EXTRA 0 // 0x1000
+
 // https://en.wikipedia.org/wiki/LEB128
 
 NSData* ulebWithLong(long value)
@@ -127,6 +130,7 @@ -(void)stepImportHeader
 	self.header=ImageHeader.alloc.initEmpty.autorelease;
 
 	self.header.header->flags=self.cacheImage.header.header->flags;
+	self.header.header->flags&=~MH_DYLIB_IN_CACHE;
 
 	__block int copied=0;
 	__block int skipped=0;
@@ -903,7 +907,7 @@ -(void)stepFixSelRefs
 	long* refs=(long*)wrapOffset(self,section->offset).pointer;
 	int count=section->size/sizeof(long);
 
-	trace(@"fixing %x selector refs",count);
+	trace(@"fix %x selector refs",count);
 
 	for(int index=0;index<count;index++)
 	{
@@ -943,7 +947,7 @@ -(void)stepFixClasses
 	long* classes=(long*)wrapOffset(self,section->offset).pointer;
 	int count=section->size/sizeof(long);
 
-	trace(@"fixing %x classes",count);
+	trace(@"fix %x classes",count);
 
 	for(int index=0;index<count;index++)
 	{
@@ -973,7 +977,7 @@ -(void)stepFixCats
 	long* cats=(long*)wrapOffset(self,section->offset).pointer;
 	int count=section->size/sizeof(long);
 
-	trace(@"fixing %x categories",count);
+	trace(@"fix %x categories",count);
 
 	for(int index=0;index<count;index++)
 	{
@@ -998,7 +1002,7 @@ -(void)stepFixProtoRefs
 	long* refs=(long*)wrapOffset(self,section->offset).pointer;
 	int count=section->size/sizeof(long);
 
-	trace(@"fixing %x protocol refs",count);
+	trace(@"fix %x protocol refs",count);
 
 	for(int index=0;index<count;index++)
 	{
@@ -1020,7 +1024,7 @@ -(void)stepFixProtos
 	long* refs=(long*)wrapOffset(self,section->offset).pointer;
 	int count=section->size/sizeof(long);
 
-	trace(@"fixing %x protocols",count);
+	trace(@"fix %x protocols",count);
 
 	for(int index=0;index<count;index++)
 	{
@@ -1137,7 +1141,7 @@ -(void)fixMethodListWithAddress:(long)address
 
 -(void)stepFixPointersNew
 {
-	trace(@"scanning %lx rebases",self.fixups.count);
+	trace(@"scan %lx rebases",self.fixups.count);
 
 	long internalCount=0;
 	long cppCount=0;
@@ -1259,7 +1263,7 @@ -(void)stepFixInitOffsets
 	int* offsets=(int*)wrapOffset(self,section->offset).pointer;
 	int count=section->size/sizeof(int);
 
-	trace(@"fixing %x initializer offsets",count);
+	trace(@"fix %x initializer offsets (delta %lx)",count,self.baseAddressDelta);
 
 	for(int index=0;index<count;index++)
 	{
@@ -1286,7 +1290,7 @@ -(void)stepSyncHeader
 {
 	// TODO: ensure we don't overrun TEXT
 
-	trace(@"syncing modified header (%lx bytes)",self.header.data.length);
+	trace(@"sync modified header (%lx bytes)",self.header.data.length);
 
 	memcpy(self.data.mutableBytes,self.header.data.mutableBytes,self.header.data.length);
 }

diff --git a/Readme.md b/Readme.md
@@ -8,12 +8,13 @@ Incomplete macOS 12+ dyld cache extractor. Used by [OCLP](https://github.com/dor
 - [Hopper Disassembler](https://www.hopperapp.com): Mach-O inspection, Objective-C struct definitions
 - [Mach-O Explorer](https://github.com/DeVaukz/MachO-Explorer), [MachOView](https://github.com/mythkiven/MachOView): Mach-O inspection
 - [Wikipedia](https://wikipedia.org): [LEB128](https://en.wikipedia.org/wiki/LEB128)
-- [Moraea](https://github.com/moraea): guidance, testing, encouragement
+- [Moraea](https://github.com/moraea): code, guidance, testing
+- [cgudrian](https://github.com/cgudrian): lldb [fix](https://github.com/dortania/PatcherSupportPkg/commit/b95da2eb01cb1f92e9f900c6458f9dee14771ad5#commitcomment-126541027)
 
 ## status
 
 - [x] copy header and load commands
-	- [x] allocate space for additional commands
+	- [ ] allocate space for additional commands (temporarily disabled)
 - [x] copy segments/sections, fixing offsets and alignment
 	- [x] optionally pad to keep addresses contiguous (produces 2+ GB images)
 - [x] generate rebase opcodes
@@ -40,18 +41,21 @@ Incomplete macOS 12+ dyld cache extractor. Used by [OCLP](https://github.com/dor
 	- [x] satisfy `install_name_tool -id test`
 	- [x] satisfy `codesign -fs -`
 	- [ ] satisfy `dyld_info -objc`
-	- [x] satisfy Stubber (`nm`, Objective-C runtime, linker)
-	- [ ] satisfy `lldb` (unlikely outside `pad` mode...)
+	- [x] satisfy Stubber 2 (`nm`, Objective-C runtime, linker)
+	- [x] satisfy `lldb`
 - [ ] produce working images
 	- [x] 12.0 DP6 - GeForceAIRPlugin, GeForceMTLDriver
 	- [ ] 12.0 DP6 - GeForceGLDriver
 	- [x] 12.6 - AppKit, QuartzCore, CoreGraphics, Carbon, RenderBox, VectorKit, Metal, MetalPerformanceShaders, MTLCompiler, GPUCompiler, AppleGVA, AppleGVACore
 	- [x] 12.6 - AMDMTLBronzeDriver, AMDShared, AMDRadeonVADriver, AMDRadeonVADriver2
 	- [x] 13.2.1 - AppKit, QuartzCore, CoreGraphics, Carbon, RenderBox, VectorKit, Metal, MetalPerformanceShaders, MTLCompiler, GPUCompiler
 	- [ ] 13.2.1 - libSystem, Foundation, Combine, ContactsFoundation, FamilyCircle...
+	- [x] 14.0 DP6 - AppleIntelKBLGraphicsMTLDriver
+	- [ ] 14.0 DP6 - AppKit, QuartzCore, Metal...
 - [ ] support Big Sur
 - [x] support Monterey
 - [x] support Ventura
+- [ ] support Sonoma
 - [ ] support arm64 (unlikely...)
 - [ ] use sane amounts of RAM and CPU (getting closer...)
 - [ ] write automated tests to detect regressions
diff --git a/Run.tool b/Run.tool
@@ -1,4 +1,4 @@
-VERSION=6
+VERSION=7
 
 set -e
 
@@ -8,23 +8,7 @@ clang++ -fmodules -fcxx-modules -std=c++17 -Wno-unused-getter-return-value -mmac
 
 rm -rf Out
 
-./dsce
-
-# ./dsce /System/Cryptexes/OS/System/Library/dyld/dyld_shared_cache_x86_64 list
-
-# ./dsce /System/Cryptexes/OS/System/Library/dyld/dyld_shared_cache_x86_64 search __init_offsets
-
-# ./dsce /System/Cryptexes/OS/System/Library/dyld/dyld_shared_cache_x86_64 /System/Library/Frameworks/AppKit.framework /System/Library/Frameworks/QuartzCore.framework /System/Library/Frameworks/CoreGraphics.framework /System/Library/Frameworks/Carbon.framework /System/Library/PrivateFrameworks/RenderBox.framework /System/Library/PrivateFrameworks/VectorKit.framework /System/Library/Frameworks/Metal.framework /System/Library/Frameworks/MetalPerformanceShaders.framework /System/Library/PrivateFrameworks/MTLCompiler.framework /System/Library/PrivateFrameworks/GPUCompiler.framework
-
-# ./dsce /System/Cryptexes/OS/System/Library/dyld/dyld_shared_cache_x86_64 pad /System/Library/Frameworks/AppKit.framework /System/Library/Frameworks/QuartzCore.framework /System/Library/Frameworks/CoreGraphics.framework /System/Library/Frameworks/Carbon.framework /System/Library/PrivateFrameworks/RenderBox.framework /System/Library/PrivateFrameworks/VectorKit.framework /System/Library/Frameworks/Metal.framework /System/Library/Frameworks/MetalPerformanceShaders.framework /System/Library/PrivateFrameworks/MTLCompiler.framework /System/Library/PrivateFrameworks/GPUCompiler.framework
+./dsce /System/Cryptexes/OS/System/Library/dyld/dyld_shared_cache_x86_64h /System/Library/Frameworks/AppKit.framework /System/Library/Frameworks/QuartzCore.framework /System/Library/Frameworks/CoreGraphics.framework /System/Library/Frameworks/Carbon.framework /System/Library/PrivateFrameworks/RenderBox.framework /System/Library/PrivateFrameworks/VectorKit.framework /System/Library/Frameworks/Metal.framework /System/Library/Frameworks/MetalPerformanceShaders.framework /System/Library/PrivateFrameworks/MTLCompiler.framework /System/Library/PrivateFrameworks/GPUCompiler.framework
 
 find -d Out -type f -exec codesign -f -s - {} \;
-chmod -R 755 Out
-
-# DYLD_FRAMEWORK_PATH="$PWD/Out/System/Library/Frameworks:$PWD/Out/System/Library/PrivateFrameworks" /System/Applications/TextEdit.app/Contents/MacOS/TextEdit
-
-# lldb -n TextEdit
-
-# mount -uw /
-# cp -R Out/ /
-# reboot
+chmod -R 755 Out