Awesome
dsce
Incomplete macOS 12+ dyld cache extractor. Used by OCLP to support some legacy GPUs and Wi-Fi hardware. Produces working binaries in many cases, but outputs should be treated with extreme suspicion...
credits
- Apple: dyld, objc4 (prerequisites)
- Hopper Disassembler: Mach-O inspection, Objective-C struct definitions
- Mach-O Explorer, MachOView: Mach-O inspection
- Wikipedia: LEB128
- Moraea: code, guidance, testing
- cgudrian: lldb fix
status
- copy header and load commands
- allocate space for additional commands (temporarily disabled)
- copy segments/sections, fixing offsets and alignment
- optionally pad to keep addresses contiguous (produces 2+ GB images)
- generate rebase opcodes
- by applying cache rebase chain
- generate bind opcodes
- by scanning rebases for external pointers
- matching imported dylib exports
- recursing re-exported dylibs/symbols
- by restoring uniqued
__got
section (Ventura) - using C++ addend hack
- from weak/lazy bind info
- by scanning rebases for external pointers
- generate exports trie
- regular
- re-export
- stub and resolver
- copy legacy symbols, indirect symbols, and string table
- fix Objective-C structures
- revert selector uniquing
- revert protocol uniquing
- fix class, category, and protocol method lists
- create fake
__objc_imageinfo
(work around Ventura crash)
- update UUIDs to
D5CE<version>-...
for visibility in logs (formerly416D7900-...
) - produce fully compliant images
- satisfy
install_name_tool -id test
- satisfy
codesign -fs -
- satisfy
dyld_info -objc
- satisfy Stubber 2 (
nm
, Objective-C runtime, linker) - satisfy
lldb
- satisfy
- produce working images
- 12.0 DP6 - GeForceAIRPlugin, GeForceMTLDriver
- 12.0 DP6 - GeForceGLDriver
- 12.6 - AppKit, QuartzCore, CoreGraphics, Carbon, RenderBox, VectorKit, Metal, MetalPerformanceShaders, MTLCompiler, GPUCompiler, AppleGVA, AppleGVACore
- 12.6 - AMDMTLBronzeDriver, AMDShared, AMDRadeonVADriver, AMDRadeonVADriver2
- 13.2.1 - AppKit, QuartzCore, CoreGraphics, Carbon, RenderBox, VectorKit, Metal, MetalPerformanceShaders, MTLCompiler, GPUCompiler
- 13.2.1 - libSystem, Foundation, Combine, ContactsFoundation, FamilyCircle...
- 14.0 DP6 - AppleIntelKBLGraphicsMTLDriver
- 14.0 DP6 - AppKit, QuartzCore, Metal...
- support Big Sur
- support Monterey
- support Ventura
- support Sonoma
- support arm64 (unlikely...)
- use sane amounts of RAM and CPU (getting closer...)
- write automated tests to detect regressions