├── Makefile
├── OldABI.h
├── OldABI.swift
├── OldABI.xcodeproj
    ├── project.pbxproj
    ├── project.xcworkspace
    │   ├── contents.xcworkspacedata
    │   ├── xcshareddata
    │   │   └── IDEWorkspaceChecks.plist
    │   └── xcuserdata
    │   │   └── charlotte.xcuserdatad
    │   │       └── UserInterfaceState.xcuserstate
    └── xcuserdata
    │   └── charlotte.xcuserdatad
    │       └── xcschemes
    │           └── xcschememanagement.plist
├── packaging
    └── control
├── patchfind.h
├── patchfind.m
└── tests
    └── main.swift


/Makefile:
--------------------------------------------------------------------------------
 1 | .PHONY: all deb-ios-rootless deb-ios-rootful
 2 | 
 3 | ifneq ($(ONLY_TAG),)
 4 | VERSION := $(shell git describe --tags --abbrev=0 | sed 's/^v//g')
 5 | else
 6 | VERSION := $(shell git describe --tags --always | sed 's/-/~/' | sed 's/-/\./g' | sed 's/\.g/\./g' | sed 's/^v//g')
 7 | endif
 8 | 
 9 | COMMON_OPTIONS = BUILD_DIR="build/" CODE_SIGNING_ALLOWED="NO" CODE_SIGNING_REQUIRED="NO" CODE_SIGN_IDENTITY="" -configuration $(CONFIGURATION)
10 | 
11 | ifneq ($(RELEASE),)
12 | CONFIGURATION = Release
13 | DEB_VERSION = $(VERSION)
14 | else
15 | CONFIGURATION = Debug
16 | DEB_VERSION = $(VERSION)+debug
17 | endif
18 | 
19 | ifneq ($(MAC),)
20 | $(error macOS is not supported yet)
21 | COMMON_OPTIONS += -destination 'generic/platform=macOS'
22 | else
23 | COMMON_OPTIONS += -destination 'generic/platform=iOS'
24 | endif
25 | 
26 | ifneq ($(MAC),)
27 | PRODUCTS_DIR = build/$(CONFIGURATION)-macosx
28 | else
29 | PRODUCTS_DIR = build/$(CONFIGURATION)-iphoneos
30 | endif
31 | 
32 | STAGE_DIR = work-$(ARCHITECTURE)/stage
33 | INSTALL_ROOT = $(STAGE_DIR)/$(INSTALL_PREFIX)
34 | 
35 | # TODO: maybe split each scheme into its own target?
36 | 
37 | all: deb
38 | 
39 | clean:
40 | 	xcodebuild -scheme OldABI $(COMMON_OPTIONS) clean
41 | 
42 | build-ios:
43 | 	xcodebuild -scheme OldABI $(COMMON_OPTIONS)
44 | 
45 | build-macos:
46 | 	# TODO
47 | 	$(error macOS is not supported yet)
48 | 
49 | deb-ios-rootful: ARCHITECTURE = iphoneos-arm
50 | deb-ios-rootful: INSTALL_PREFIX = 
51 | 
52 | deb-ios-rootless: ARCHITECTURE = iphoneos-arm64
53 | deb-ios-rootless: INSTALL_PREFIX = /var/jb
54 | 
55 | deb-ios-rootful deb-ios-rootless: build-ios
56 | 	@rm -rf work-$(ARCHITECTURE)
57 | 	@mkdir -p $(STAGE_DIR)
58 | 
59 | 	@# Because BSD install does not support -D
60 | 	@mkdir -p $(INSTALL_ROOT)/usr/lib/ellekit
61 | 
62 | 	@install -m644 $(PRODUCTS_DIR)/OldABI.dylib $(INSTALL_ROOT)/usr/lib/ellekit/OldABI.dylib
63 | 	
64 | 	@ldid -S $(INSTALL_ROOT)/usr/lib/ellekit/OldABI.dylib
65 | 
66 | 	@mkdir -p $(STAGE_DIR)/DEBIAN
67 | 	@sed -e "s|@DEB_VERSION@|$(DEB_VERSION)|g" -e "s|@DEB_ARCH@|$(ARCHITECTURE)|g" packaging/control >$(STAGE_DIR)/DEBIAN/control
68 | 
69 | 	@mkdir -p packages
70 | 	dpkg-deb -Zzstd --root-owner-group -b $(STAGE_DIR) packages/oldabi_$(DEB_VERSION)_$(ARCHITECTURE).deb
71 | 	
72 | 	@rm -rf work-$(ARCHITECTURE)
73 | 
74 | deb-ios: deb-ios-rootful deb-ios-rootless
75 | 
76 | deb-macos: build-macos
77 | 	# TODO
78 | 	$(error macOS is not supported yet)
79 | 
80 | ifneq ($(MAC),)
81 | deb: deb-macos
82 | else
83 | deb: deb-ios
84 | endif
85 | 
86 | ifneq ($(MAC),)
87 | build: build-macos
88 | else
89 | build: build-ios
90 | endif
91 | 


--------------------------------------------------------------------------------
/OldABI.h:
--------------------------------------------------------------------------------
1 | 
2 | #ifndef OldABI_h
3 | #define OldABI_h
4 | 
5 | #include <stdio.h>
6 | #include "patchfind.h"
7 | 
8 | #endif /* OldABI_h */
9 | 


--------------------------------------------------------------------------------
/OldABI.swift:
--------------------------------------------------------------------------------
  1 | 
  2 | import Foundation
  3 | import MachO
  4 | 
  5 | typealias FileHandleC = UnsafeMutablePointer<FILE>
  6 | extension FileHandleC {
  7 |     @inline(__always)
  8 |     func readData(ofLength count: Int) -> UnsafeMutableRawPointer {
  9 |         let alloc = malloc(count)
 10 |         fread(alloc, 1, count, self)
 11 |         return alloc!
 12 |     }
 13 |     
 14 |     @discardableResult @inline(__always)
 15 |     func seek(toFileOffset offset: UInt64) -> UnsafeMutablePointer<FILE> {
 16 |         var pos: fpos_t = .init(offset)
 17 |         fsetpos(self, &pos)
 18 |         return self
 19 |     }
 20 |     
 21 |     @inline(__always)
 22 |     var offsetInFile: UInt64 {
 23 |         var pos: fpos_t = 0
 24 |         fgetpos(self, &pos)
 25 |         return .init(pos)
 26 |     }
 27 |     
 28 |     @inline(__always)
 29 |     func close() {
 30 |         fclose(self)
 31 |     }
 32 | }
 33 | 
 34 | let ekhandle = dlopen("/var/jb/usr/lib/libellekit.dylib", RTLD_NOW);
 35 | 
 36 | let hookMemory = {
 37 |     unsafeBitCast(dlsym(ekhandle, "MSHookMemory"), to: (@convention (c) (UnsafeRawPointer, UnsafeRawPointer, size_t) -> Void).self)
 38 | }()
 39 | 
 40 | let hookFunction = {
 41 |     unsafeBitCast(dlsym(ekhandle, "MSHookFunction"), to: (@convention (c) (UnsafeRawPointer, UnsafeRawPointer, UnsafeMutablePointer<UnsafeMutableRawPointer?>?) -> Void).self)
 42 | }()
 43 | 
 44 | func oneshot_fix_oldabi() {
 45 |     for image in 0..<_dyld_image_count() {
 46 |         if String(cString: _dyld_get_image_name(image)) == "/usr/lib/libobjc.A.dylib" ||
 47 |             String(cString: _dyld_get_image_name(image)) == "/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation" {
 48 |             var bytes: [UInt8] = [
 49 |                 0x00, 0x18, 0xC1, 0xDA
 50 |             ]
 51 |             
 52 |             var mask: [UInt8] = [
 53 |                 0x00, 0xFC, 0xFF, 0xFF
 54 |             ]
 55 |             
 56 |             while true {
 57 |                 let autda = patchfind_find(Int32(image), &bytes, &mask, 4)
 58 |                                 
 59 |                 if let autda {
 60 |                     hookMemory(autda, [
 61 |                         CFSwapInt32(0xF047C1DA) // xpacd x16
 62 |                     ], 4)
 63 |                 } else {
 64 |                     break
 65 |                 }
 66 |             }
 67 |         }
 68 |     }
 69 | }
 70 | 
 71 | func looksLegacy(_ path: UnsafePointer<CChar>) -> Bool {
 72 |     guard let handle = fopen(path, "r") else {
 73 |         return false
 74 |     }
 75 |     
 76 |     defer { handle.close() }
 77 |     
 78 |     let machHeaderPointer = handle
 79 |         .readData(ofLength: MemoryLayout<mach_header_64>.size)
 80 |     
 81 |     defer { machHeaderPointer.deallocate() }
 82 |     
 83 |     if machHeaderPointer.assumingMemoryBound(to: mach_header_64.self).pointee.magic == FAT_CIGAM {
 84 |         // we have a fat binary
 85 |         // get our current cpu subtype
 86 |         let nslices = handle
 87 |             .seek(toFileOffset: 0x4)
 88 |             .readData(ofLength: MemoryLayout<UInt32>.size)
 89 |             .assumingMemoryBound(to: UInt32.self)
 90 |             .pointee.bigEndian
 91 |                         
 92 |         for i in 0..<nslices {
 93 |             let slice_ptr = handle
 94 |                 .seek(toFileOffset: UInt64(8 + (Int(i) * 20)))
 95 |                 .readData(ofLength: MemoryLayout<fat_arch>.size)
 96 |                 .assumingMemoryBound(to: fat_arch.self)
 97 |             
 98 |             let slice = slice_ptr.pointee
 99 |             
100 |             defer { slice_ptr.deallocate() }
101 |             
102 |             if slice.cputype.bigEndian == CPU_TYPE_ARM64 {
103 |                                             
104 |                 let slice_ptr = handle
105 |                     .seek(toFileOffset: UInt64(8 + (Int(i) * 20)))
106 |                     .readData(ofLength: MemoryLayout<fat_arch>.size)
107 |                     .assumingMemoryBound(to: fat_arch.self)
108 |                 
109 |                 let slice = slice_ptr.pointee
110 |                 
111 |                 defer { slice_ptr.deallocate() }
112 |                                 
113 |                 if slice.cpusubtype == 0x2000080 { // new abi
114 |                     return false
115 |                 }
116 |                 
117 |                 if slice.cpusubtype == 0x2000000 { // old abi
118 |                     return true
119 |                 }
120 |             }
121 |         }
122 |     }
123 |     
124 |     return false
125 | }
126 | 
127 | typealias dlopen_body = @convention(c) (UnsafePointer<CChar>, Int32) -> UnsafeRawPointer
128 | 
129 | let orig: UnsafeMutablePointer<UnsafeMutableRawPointer?> = .allocate(capacity: 8)
130 | 
131 | @_cdecl("dlopen_hook_oldabi")
132 | func dlopen_hook_oldabi(_ path: UnsafePointer<CChar>, _ loadtype: Int32) -> UnsafeRawPointer {
133 |     if looksLegacy(path) {
134 |         oneshot_fix_oldabi()
135 |     }
136 |         
137 |     return unsafeBitCast(orig.pointee, to: dlopen_body.self)(path, loadtype)
138 | }
139 | 
140 | struct Info: Codable {
141 |     var CFBundleExecutable: String?
142 | }
143 | 
144 | func fixupPreferences() throws {
145 |     let bundlePath = ("/var/jb/Library/PreferenceBundles/" as NSString).resolvingSymlinksInPath
146 |     let files = try FileManager.default.contentsOfDirectory(atPath: bundlePath)
147 |     for file in files {
148 |         if file.hasSuffix(".bundle") {
149 |             let info = bundlePath+"/"+file+"/Info.plist"
150 |             if FileManager.default.fileExists(atPath: info),
151 |                let infoData = try? Data(contentsOf: NSURL.fileURL(withPath: info)),
152 |                let infoRoot = try? PropertyListDecoder().decode(Info.self, from: infoData),
153 |                let exec = infoRoot.CFBundleExecutable,
154 |                looksLegacy(bundlePath+"/"+file+"/"+exec) {
155 |                 oneshot_fix_oldabi()
156 |             }
157 |         }
158 |     }
159 | }
160 | 
161 | @_cdecl("swift_ctor")
162 | public func ctor() {
163 | 	let whitelist = [
164 | 		"/System/Library/CoreServices/SpringBoard.app/SpringBoard",
165 | 		"/Applications/",
166 | 		"/usr/sbin/mediaserverd",
167 | 		"/usr/libexec/backboardd",
168 | 		"/usr/libexec/nfcd"
169 | 	].map {
170 | 		ProcessInfo.processInfo.arguments[0].hasPrefix($0)
171 | 	}.contains(true)
172 | 
173 |     if !whitelist && !(ProcessInfo.processInfo.arguments.first?.contains("/procursus/Applications/") == true) {
174 |         return
175 |     }
176 | 
177 |     if ProcessInfo.processInfo.arguments.first?.contains("/Applications/Preferences.app/Preferences") == true {
178 |         try? fixupPreferences()
179 |     }
180 | 
181 |     let repcl: @convention(c) (UnsafePointer<CChar>, Int32) -> UnsafeRawPointer = dlopen_hook_oldabi
182 |     let repptr = unsafeBitCast(repcl, to: UnsafeMutableRawPointer.self)
183 |     
184 |     hookFunction(dlsym(dlopen(nil, RTLD_NOW), "dlopen"), repptr, orig)
185 | }
186 | 


--------------------------------------------------------------------------------
/OldABI.xcodeproj/project.pbxproj:
--------------------------------------------------------------------------------
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 54 | /* End PBXFrameworksBuildPhase section */
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 56 | /* Begin PBXGroup section */
 57 | 		9E5D8B0429DE46080068D078 /* tests */ = {
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 59 | 			children = (
 60 | 				9E5D8B0529DE46080068D078 /* main.swift */,
 61 | 			);
 62 | 			path = tests;
 63 | 			sourceTree = "<group>";
 64 | 		};
 65 | 		9EF3203929D4CD8200175976 = {
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 70 | 				9EF3204D29D4CE0700175976 /* patchfind.h */,
 71 | 				9EF3204E29D4CE0700175976 /* patchfind.m */,
 72 | 				9E5D8B0429DE46080068D078 /* tests */,
 73 | 				9EF3204329D4CD8200175976 /* Products */,
 74 | 			);
 75 | 			sourceTree = "<group>";
 76 | 		};
 77 | 		9EF3204329D4CD8200175976 /* Products */ = {
 78 | 			isa = PBXGroup;
 79 | 			children = (
 80 | 				9EF3204229D4CD8200175976 /* OldABI.dylib */,
 81 | 				9E5D8B0329DE46080068D078 /* tests */,
 82 | 			);
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 86 | /* End PBXGroup section */
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 88 | /* Begin PBXHeadersBuildPhase section */
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 94 | 				9EF3204B29D4CD8C00175976 /* OldABI.h in Headers */,
 95 | 			);
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 97 | 		};
 98 | /* End PBXHeadersBuildPhase section */
 99 | 
100 | /* Begin PBXNativeTarget section */
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104 | 			buildPhases = (
105 | 				9E5D8AFF29DE46080068D078 /* Sources */,
106 | 				9E5D8B0029DE46080068D078 /* Frameworks */,
107 | 				9E5D8B0129DE46080068D078 /* CopyFiles */,
108 | 			);
109 | 			buildRules = (
110 | 			);
111 | 			dependencies = (
112 | 			);
113 | 			name = tests;
114 | 			productName = tests;
115 | 			productReference = 9E5D8B0329DE46080068D078 /* tests */;
116 | 			productType = "com.apple.product-type.tool";
117 | 		};
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119 | 			isa = PBXNativeTarget;
120 | 			buildConfigurationList = 9EF3204629D4CD8200175976 /* Build configuration list for PBXNativeTarget "OldABI" */;
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122 | 				9EF3203E29D4CD8200175976 /* Headers */,
123 | 				9EF3203F29D4CD8200175976 /* Sources */,
124 | 				9EF3204029D4CD8200175976 /* Frameworks */,
125 | 			);
126 | 			buildRules = (
127 | 			);
128 | 			dependencies = (
129 | 			);
130 | 			name = OldABI;
131 | 			productName = OldABI;
132 | 			productReference = 9EF3204229D4CD8200175976 /* OldABI.dylib */;
133 | 			productType = "com.apple.product-type.library.dynamic";
134 | 		};
135 | /* End PBXNativeTarget section */
136 | 
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140 | 			attributes = {
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143 | 				LastUpgradeCheck = 1410;
144 | 				TargetAttributes = {
145 | 					9E5D8B0229DE46080068D078 = {
146 | 						CreatedOnToolsVersion = 14.1;
147 | 					};
148 | 					9EF3204129D4CD8200175976 = {
149 | 						CreatedOnToolsVersion = 14.1;
150 | 					};
151 | 				};
152 | 			};
153 | 			buildConfigurationList = 9EF3203D29D4CD8200175976 /* Build configuration list for PBXProject "OldABI" */;
154 | 			compatibilityVersion = "Xcode 14.0";
155 | 			developmentRegion = en;
156 | 			hasScannedForEncodings = 0;
157 | 			knownRegions = (
158 | 				en,
159 | 				Base,
160 | 			);
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175 | 			buildActionMask = 2147483647;
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177 | 				9E5D8B0629DE46080068D078 /* main.swift in Sources */,
178 | 			);
179 | 			runOnlyForDeploymentPostprocessing = 0;
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183 | 			buildActionMask = 2147483647;
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185 | 				9EF3204C29D4CD8C00175976 /* OldABI.swift in Sources */,
186 | 				9EF3205029D4CE0700175976 /* patchfind.m in Sources */,
187 | 			);
188 | 			runOnlyForDeploymentPostprocessing = 0;
189 | 		};
190 | /* End PBXSourcesBuildPhase section */
191 | 
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193 | 		9E5D8B0729DE46080068D078 /* Debug */ = {
194 | 			isa = XCBuildConfiguration;
195 | 			buildSettings = {
196 | 				CODE_SIGN_STYLE = Automatic;
197 | 				DEVELOPMENT_TEAM = VF46MYDSGH;
198 | 				ENABLE_HARDENED_RUNTIME = YES;
199 | 				PRODUCT_NAME = "$(TARGET_NAME)";
200 | 				SWIFT_ACTIVE_COMPILATION_CONDITIONS = DEBUG;
201 | 				SWIFT_OPTIMIZATION_LEVEL = "-Onone";
202 | 				SWIFT_VERSION = 5.0;
203 | 			};
204 | 			name = Debug;
205 | 		};
206 | 		9E5D8B0829DE46080068D078 /* Release */ = {
207 | 			isa = XCBuildConfiguration;
208 | 			buildSettings = {
209 | 				CODE_SIGN_STYLE = Automatic;
210 | 				DEVELOPMENT_TEAM = VF46MYDSGH;
211 | 				ENABLE_HARDENED_RUNTIME = YES;
212 | 				PRODUCT_NAME = "$(TARGET_NAME)";
213 | 				SWIFT_COMPILATION_MODE = wholemodule;
214 | 				SWIFT_OPTIMIZATION_LEVEL = "-O";
215 | 				SWIFT_VERSION = 5.0;
216 | 			};
217 | 			name = Release;
218 | 		};
219 | 		9EF3204429D4CD8200175976 /* Debug */ = {
220 | 			isa = XCBuildConfiguration;
221 | 			buildSettings = {
222 | 				ALWAYS_SEARCH_USER_PATHS = NO;
223 | 				CLANG_ANALYZER_NONNULL = YES;
224 | 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
225 | 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
226 | 				CLANG_ENABLE_MODULES = YES;
227 | 				CLANG_ENABLE_OBJC_ARC = YES;
228 | 				CLANG_ENABLE_OBJC_WEAK = YES;
229 | 				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
230 | 				CLANG_WARN_BOOL_CONVERSION = YES;
231 | 				CLANG_WARN_COMMA = YES;
232 | 				CLANG_WARN_CONSTANT_CONVERSION = YES;
233 | 				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
234 | 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
235 | 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
236 | 				CLANG_WARN_EMPTY_BODY = YES;
237 | 				CLANG_WARN_ENUM_CONVERSION = YES;
238 | 				CLANG_WARN_INFINITE_RECURSION = YES;
239 | 				CLANG_WARN_INT_CONVERSION = YES;
240 | 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
241 | 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
242 | 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
243 | 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
244 | 				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
245 | 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
246 | 				CLANG_WARN_STRICT_PROTOTYPES = YES;
247 | 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
248 | 				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
249 | 				CLANG_WARN_UNREACHABLE_CODE = YES;
250 | 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
251 | 				COPY_PHASE_STRIP = NO;
252 | 				DEBUG_INFORMATION_FORMAT = dwarf;
253 | 				ENABLE_STRICT_OBJC_MSGSEND = YES;
254 | 				ENABLE_TESTABILITY = YES;
255 | 				GCC_C_LANGUAGE_STANDARD = gnu11;
256 | 				GCC_DYNAMIC_NO_PIC = NO;
257 | 				GCC_NO_COMMON_BLOCKS = YES;
258 | 				GCC_OPTIMIZATION_LEVEL = 0;
259 | 				GCC_PREPROCESSOR_DEFINITIONS = (
260 | 					"DEBUG=1",
261 | 					"$(inherited)",
262 | 				);
263 | 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
264 | 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
265 | 				GCC_WARN_UNDECLARED_SELECTOR = YES;
266 | 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
267 | 				GCC_WARN_UNUSED_FUNCTION = YES;
268 | 				GCC_WARN_UNUSED_VARIABLE = YES;
269 | 				MACOSX_DEPLOYMENT_TARGET = 13.0;
270 | 				MTL_ENABLE_DEBUG_INFO = INCLUDE_SOURCE;
271 | 				MTL_FAST_MATH = YES;
272 | 				ONLY_ACTIVE_ARCH = YES;
273 | 				SDKROOT = macosx;
274 | 			};
275 | 			name = Debug;
276 | 		};
277 | 		9EF3204529D4CD8200175976 /* Release */ = {
278 | 			isa = XCBuildConfiguration;
279 | 			buildSettings = {
280 | 				ALWAYS_SEARCH_USER_PATHS = NO;
281 | 				CLANG_ANALYZER_NONNULL = YES;
282 | 				CLANG_ANALYZER_NUMBER_OBJECT_CONVERSION = YES_AGGRESSIVE;
283 | 				CLANG_CXX_LANGUAGE_STANDARD = "gnu++20";
284 | 				CLANG_ENABLE_MODULES = YES;
285 | 				CLANG_ENABLE_OBJC_ARC = YES;
286 | 				CLANG_ENABLE_OBJC_WEAK = YES;
287 | 				CLANG_WARN_BLOCK_CAPTURE_AUTORELEASING = YES;
288 | 				CLANG_WARN_BOOL_CONVERSION = YES;
289 | 				CLANG_WARN_COMMA = YES;
290 | 				CLANG_WARN_CONSTANT_CONVERSION = YES;
291 | 				CLANG_WARN_DEPRECATED_OBJC_IMPLEMENTATIONS = YES;
292 | 				CLANG_WARN_DIRECT_OBJC_ISA_USAGE = YES_ERROR;
293 | 				CLANG_WARN_DOCUMENTATION_COMMENTS = YES;
294 | 				CLANG_WARN_EMPTY_BODY = YES;
295 | 				CLANG_WARN_ENUM_CONVERSION = YES;
296 | 				CLANG_WARN_INFINITE_RECURSION = YES;
297 | 				CLANG_WARN_INT_CONVERSION = YES;
298 | 				CLANG_WARN_NON_LITERAL_NULL_CONVERSION = YES;
299 | 				CLANG_WARN_OBJC_IMPLICIT_RETAIN_SELF = YES;
300 | 				CLANG_WARN_OBJC_LITERAL_CONVERSION = YES;
301 | 				CLANG_WARN_OBJC_ROOT_CLASS = YES_ERROR;
302 | 				CLANG_WARN_QUOTED_INCLUDE_IN_FRAMEWORK_HEADER = YES;
303 | 				CLANG_WARN_RANGE_LOOP_ANALYSIS = YES;
304 | 				CLANG_WARN_STRICT_PROTOTYPES = YES;
305 | 				CLANG_WARN_SUSPICIOUS_MOVE = YES;
306 | 				CLANG_WARN_UNGUARDED_AVAILABILITY = YES_AGGRESSIVE;
307 | 				CLANG_WARN_UNREACHABLE_CODE = YES;
308 | 				CLANG_WARN__DUPLICATE_METHOD_MATCH = YES;
309 | 				COPY_PHASE_STRIP = NO;
310 | 				DEBUG_INFORMATION_FORMAT = "dwarf-with-dsym";
311 | 				ENABLE_NS_ASSERTIONS = NO;
312 | 				ENABLE_STRICT_OBJC_MSGSEND = YES;
313 | 				GCC_C_LANGUAGE_STANDARD = gnu11;
314 | 				GCC_NO_COMMON_BLOCKS = YES;
315 | 				GCC_WARN_64_TO_32_BIT_CONVERSION = YES;
316 | 				GCC_WARN_ABOUT_RETURN_TYPE = YES_ERROR;
317 | 				GCC_WARN_UNDECLARED_SELECTOR = YES;
318 | 				GCC_WARN_UNINITIALIZED_AUTOS = YES_AGGRESSIVE;
319 | 				GCC_WARN_UNUSED_FUNCTION = YES;
320 | 				GCC_WARN_UNUSED_VARIABLE = YES;
321 | 				MACOSX_DEPLOYMENT_TARGET = 13.0;
322 | 				MTL_ENABLE_DEBUG_INFO = NO;
323 | 				MTL_FAST_MATH = YES;
324 | 				SDKROOT = macosx;
325 | 			};
326 | 			name = Release;
327 | 		};
328 | 		9EF3204729D4CD8200175976 /* Debug */ = {
329 | 			isa = XCBuildConfiguration;
330 | 			buildSettings = {
331 | 				ALLOW_TARGET_PLATFORM_SPECIALIZATION = YES;
332 | 				ARCHS = arm64e;
333 | 				CODE_SIGN_STYLE = Automatic;
334 | 				DEVELOPMENT_TEAM = VF46MYDSGH;
335 | 				DYLIB_COMPATIBILITY_VERSION = 1;
336 | 				DYLIB_CURRENT_VERSION = 1;
337 | 				EXECUTABLE_PREFIX = "";
338 | 				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
339 | 				MACOSX_DEPLOYMENT_TARGET = 11.0;
340 | 				ONLY_ACTIVE_ARCH = NO;
341 | 				PRODUCT_NAME = "$(TARGET_NAME)";
342 | 				SDKROOT = iphoneos;
343 | 				SKIP_INSTALL = YES;
344 | 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos";
345 | 				SUPPORTS_MACCATALYST = YES;
346 | 				SWIFT_OBJC_BRIDGING_HEADER = OldABI.h;
347 | 				SWIFT_VERSION = 5.0;
348 | 			};
349 | 			name = Debug;
350 | 		};
351 | 		9EF3204829D4CD8200175976 /* Release */ = {
352 | 			isa = XCBuildConfiguration;
353 | 			buildSettings = {
354 | 				ALLOW_TARGET_PLATFORM_SPECIALIZATION = YES;
355 | 				ARCHS = arm64e;
356 | 				CODE_SIGN_STYLE = Automatic;
357 | 				DEVELOPMENT_TEAM = VF46MYDSGH;
358 | 				DYLIB_COMPATIBILITY_VERSION = 1;
359 | 				DYLIB_CURRENT_VERSION = 1;
360 | 				EXECUTABLE_PREFIX = "";
361 | 				IPHONEOS_DEPLOYMENT_TARGET = 15.0;
362 | 				MACOSX_DEPLOYMENT_TARGET = 11.0;
363 | 				ONLY_ACTIVE_ARCH = NO;
364 | 				PRODUCT_NAME = "$(TARGET_NAME)";
365 | 				SDKROOT = iphoneos;
366 | 				SKIP_INSTALL = YES;
367 | 				SUPPORTED_PLATFORMS = "iphonesimulator iphoneos";
368 | 				SUPPORTS_MACCATALYST = YES;
369 | 				SWIFT_OBJC_BRIDGING_HEADER = OldABI.h;
370 | 				SWIFT_VERSION = 5.0;
371 | 			};
372 | 			name = Release;
373 | 		};
374 | /* End XCBuildConfiguration section */
375 | 
376 | /* Begin XCConfigurationList section */
377 | 		9E5D8B0929DE46080068D078 /* Build configuration list for PBXNativeTarget "tests" */ = {
378 | 			isa = XCConfigurationList;
379 | 			buildConfigurations = (
380 | 				9E5D8B0729DE46080068D078 /* Debug */,
381 | 				9E5D8B0829DE46080068D078 /* Release */,
382 | 			);
383 | 			defaultConfigurationIsVisible = 0;
384 | 			defaultConfigurationName = Release;
385 | 		};
386 | 		9EF3203D29D4CD8200175976 /* Build configuration list for PBXProject "OldABI" */ = {
387 | 			isa = XCConfigurationList;
388 | 			buildConfigurations = (
389 | 				9EF3204429D4CD8200175976 /* Debug */,
390 | 				9EF3204529D4CD8200175976 /* Release */,
391 | 			);
392 | 			defaultConfigurationIsVisible = 0;
393 | 			defaultConfigurationName = Release;
394 | 		};
395 | 		9EF3204629D4CD8200175976 /* Build configuration list for PBXNativeTarget "OldABI" */ = {
396 | 			isa = XCConfigurationList;
397 | 			buildConfigurations = (
398 | 				9EF3204729D4CD8200175976 /* Debug */,
399 | 				9EF3204829D4CD8200175976 /* Release */,
400 | 			);
401 | 			defaultConfigurationIsVisible = 0;
402 | 			defaultConfigurationName = Release;
403 | 		};
404 | /* End XCConfigurationList section */
405 | 	};
406 | 	rootObject = 9EF3203A29D4CD8200175976 /* Project object */;
407 | }
408 | 


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/OldABI.xcodeproj/project.xcworkspace/contents.xcworkspacedata:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <Workspace
3 |    version = "1.0">
4 |    <FileRef
5 |       location = "self:">
6 |    </FileRef>
7 | </Workspace>
8 | 


--------------------------------------------------------------------------------
/OldABI.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" encoding="UTF-8"?>
2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
3 | <plist version="1.0">
4 | <dict>
5 | 	<key>IDEDidComputeMac32BitWarning</key>
6 | 	<true/>
7 | </dict>
8 | </plist>
9 | 


--------------------------------------------------------------------------------
/OldABI.xcodeproj/project.xcworkspace/xcuserdata/charlotte.xcuserdatad/UserInterfaceState.xcuserstate:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/tealbathingsuit/OldABI/ba6396be715c1f8b591aef198217af17f559e3fe/OldABI.xcodeproj/project.xcworkspace/xcuserdata/charlotte.xcuserdatad/UserInterfaceState.xcuserstate


--------------------------------------------------------------------------------
/OldABI.xcodeproj/xcuserdata/charlotte.xcuserdatad/xcschemes/xcschememanagement.plist:
--------------------------------------------------------------------------------
 1 | <?xml version="1.0" encoding="UTF-8"?>
 2 | <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 3 | <plist version="1.0">
 4 | <dict>
 5 | 	<key>SchemeUserState</key>
 6 | 	<dict>
 7 | 		<key>OldABI.xcscheme_^#shared#^_</key>
 8 | 		<dict>
 9 | 			<key>orderHint</key>
10 | 			<integer>0</integer>
11 | 		</dict>
12 | 		<key>tests.xcscheme_^#shared#^_</key>
13 | 		<dict>
14 | 			<key>orderHint</key>
15 | 			<integer>1</integer>
16 | 		</dict>
17 | 	</dict>
18 | </dict>
19 | </plist>
20 | 


--------------------------------------------------------------------------------
/packaging/control:
--------------------------------------------------------------------------------
1 | Architecture: iphoneos-arm64
2 | Author: Evelyn
3 | Depends: ellekit (>= 0.4), cy+cpu.arm64e, firmware (>= 15.0)
4 | Description: Support for legacy arm64e ABI in iOS 15.0+
5 | Package: oldabi
6 | Maintainer: Evelyn
7 | Name: Legacy arm64e Support
8 | Version: @DEB_VERSION@
9 | 


--------------------------------------------------------------------------------
/patchfind.h:
--------------------------------------------------------------------------------
1 | void *patchfind_seek_back(void *startPtr, uint32_t toInstruction, uint32_t mask, unsigned int maxSearch);
2 | void *patchfind_find(int imageIndex, unsigned char *bytesToSearch, unsigned char *byteMask, size_t byteCount);
3 | 


--------------------------------------------------------------------------------
/patchfind.m:
--------------------------------------------------------------------------------
  1 | #import <mach-o/dyld.h>
  2 | #import <objc/runtime.h>
  3 | #import <dlfcn.h>
  4 | #import <mach/mach.h>
  5 | #import <Foundation/Foundation.h>
  6 | 
  7 | int memcmp_masked(const void *str1, const void *str2, unsigned char *mask, size_t n)
  8 | {
  9 |     const unsigned char *p = (const unsigned char*)str1;
 10 |     const unsigned char *q = (const unsigned char*)str2;
 11 | 
 12 |     if (p == q) return 0;
 13 | 
 14 |     for (int i = 0; i < n; i++) {
 15 |         unsigned char cMask = mask[i];
 16 |         if ((p[i] & cMask) != (q[i] & cMask)) {
 17 |             // we do not care about 1 / -1
 18 |             return -1;
 19 |         }
 20 |     }
 21 | 
 22 |     return 0;
 23 | }
 24 | 
 25 | void *_patchfind_in_region(vm_address_t startAddr, vm_offset_t regionLength, unsigned char *bytesToSearch, unsigned char *byteMask, size_t byteCount)
 26 | {
 27 |     if (byteCount < 1) {
 28 |         return NULL;
 29 |     }
 30 | 
 31 |     unsigned int firstByteIndex = 0;
 32 |     if (byteMask != NULL) {
 33 |         for (size_t i = 0; i < byteCount; i++) {
 34 |             if (byteMask[i] == 0xFF) {
 35 |                 firstByteIndex = i;
 36 |                 break;
 37 |             }
 38 |         }
 39 |     }
 40 | 
 41 |     unsigned char firstByte = bytesToSearch[firstByteIndex];
 42 |     vm_address_t curAddr = startAddr;
 43 | 
 44 |     while(curAddr < startAddr + regionLength) {
 45 |         size_t searchSize = (startAddr - curAddr) + regionLength;
 46 |         void *foundPtr = memchr((void*)curAddr,firstByte,searchSize);
 47 | 
 48 |         if (foundPtr == NULL) {
 49 |             break;
 50 |         }
 51 | 
 52 |         vm_address_t foundAddr = (vm_address_t)foundPtr;
 53 | 
 54 |         // correct foundPtr in respect of firstByteIndex
 55 |         foundPtr = (void*)((intptr_t)foundPtr - firstByteIndex);
 56 | 
 57 |         size_t remainingBytes = regionLength - (foundAddr - startAddr);
 58 | 
 59 |         if (remainingBytes >= byteCount) {
 60 |             int memcmp_res;
 61 |             if (byteMask != NULL) {
 62 |                 memcmp_res = memcmp_masked(foundPtr, bytesToSearch, byteMask, byteCount);
 63 |             }
 64 |             else {
 65 |                 memcmp_res = memcmp(foundPtr, bytesToSearch, byteCount);
 66 |             }
 67 | 
 68 |             if (memcmp_res == 0) {
 69 |                 return foundPtr;
 70 |             }
 71 |         }
 72 |         else {
 73 |             break;
 74 |         }
 75 | 
 76 |         curAddr = foundAddr + 1;
 77 |     }
 78 | 
 79 |     return NULL;
 80 | }
 81 | 
 82 | void *patchfind_seek_back(void *startPtr, uint32_t toInstruction, uint32_t mask, unsigned int maxSearch)
 83 | {
 84 |     vm_address_t startAddr = (vm_address_t)startPtr;
 85 |     vm_address_t curAddr = startAddr;
 86 | 
 87 |     while((startAddr - curAddr) < maxSearch) {
 88 |         void *curPtr = (void*)curAddr;
 89 |         uint32_t curInst = *(uint32_t*)curPtr;
 90 | 
 91 |         if ((curInst & mask) == (toInstruction & mask)) {
 92 |             return curPtr;
 93 |         }
 94 | 
 95 |         curAddr = curAddr - 1;
 96 |     }
 97 | 
 98 |     return NULL;
 99 | }
100 | 
101 | void *patchfind_find(int imageIndex, unsigned char *bytesToSearch, unsigned char *byteMask, size_t byteCount)
102 | {
103 |     intptr_t baseAddr = _dyld_get_image_vmaddr_slide(imageIndex);
104 |     struct mach_header_64 *header = (struct mach_header_64*)_dyld_get_image_header(imageIndex);
105 | 
106 |     const struct segment_command_64 *cmd;
107 | 
108 |     uintptr_t addr = (uintptr_t)(header + 1);
109 |     uintptr_t endAddr = addr + header->sizeofcmds;
110 | 
111 |     for (int ci = 0; ci < header->ncmds && addr <= endAddr; ci++) {
112 |         cmd = (typeof(cmd))addr;
113 | 
114 |         addr = addr + cmd->cmdsize;
115 | 
116 |         if (cmd->cmd != LC_SEGMENT_64 || strcmp(cmd->segname, "__TEXT")) {
117 |             continue;
118 |         }
119 | 
120 |         return _patchfind_in_region(cmd->vmaddr + baseAddr, cmd->vmsize, bytesToSearch, byteMask, byteCount);
121 |     }
122 | 
123 |     return NULL;
124 | }
125 | 
126 | extern void swift_ctor(void);
127 | 
128 | __attribute__((constructor))
129 | static void ctor() {
130 |     swift_ctor();
131 | }
132 | 


--------------------------------------------------------------------------------
/tests/main.swift:
--------------------------------------------------------------------------------
  1 | 
  2 | import Foundation
  3 | import MachO
  4 | 
  5 | let ekhandle = dlopen("/var/jb/usr/lib/libellekit.dylib", RTLD_NOW);
  6 | 
  7 | typealias FileHandleC = UnsafeMutablePointer<FILE>
  8 | extension FileHandleC {
  9 |     @inline(__always)
 10 |     func readData(ofLength count: Int) -> UnsafeMutableRawPointer {
 11 |         let alloc = malloc(count)
 12 |         fread(alloc, 1, count, self)
 13 |         return alloc!
 14 |     }
 15 |     
 16 |     @discardableResult @inline(__always)
 17 |     func seek(toFileOffset offset: UInt64) -> UnsafeMutablePointer<FILE> {
 18 |         var pos: fpos_t = .init(offset)
 19 |         fsetpos(self, &pos)
 20 |         return self
 21 |     }
 22 |     
 23 |     @inline(__always)
 24 |     var offsetInFile: UInt64 {
 25 |         var pos: fpos_t = 0
 26 |         fgetpos(self, &pos)
 27 |         return .init(pos)
 28 |     }
 29 |     
 30 |     @inline(__always)
 31 |     func close() {
 32 |         fclose(self)
 33 |     }
 34 | }
 35 | 
 36 | let hookMemory = {
 37 |     unsafeBitCast(dlsym(ekhandle, "MSHookMemory"), to: (@convention (c) (UnsafeRawPointer, UnsafeRawPointer, size_t) -> Void).self)
 38 | }()
 39 | 
 40 | let hookFunction = {
 41 |     unsafeBitCast(dlsym(ekhandle, "MSHookFunction"), to: (@convention (c) (UnsafeRawPointer, UnsafeRawPointer, UnsafeMutablePointer<UnsafeMutableRawPointer?>?) -> Void).self)
 42 | }()
 43 | 
 44 | func looksLegacy(_ path: UnsafePointer<CChar>) -> Bool {
 45 |     guard let handle = fopen(path, "r") else {
 46 |         print("Failed to open destination file")
 47 |         return false
 48 |     }
 49 |     
 50 |     defer { handle.close() }
 51 |     
 52 |     let machHeaderPointer = handle
 53 |         .readData(ofLength: MemoryLayout<mach_header_64>.size)
 54 |     
 55 |     defer { machHeaderPointer.deallocate() }
 56 |     
 57 |     if machHeaderPointer.assumingMemoryBound(to: mach_header_64.self).pointee.magic == FAT_CIGAM {
 58 |         // we have a fat binary
 59 |         // get our current cpu subtype
 60 |         let nslices = handle
 61 |             .seek(toFileOffset: 0x4)
 62 |             .readData(ofLength: MemoryLayout<UInt32>.size)
 63 |             .assumingMemoryBound(to: UInt32.self)
 64 |             .pointee.bigEndian
 65 |                         
 66 |         for i in 0..<nslices {
 67 |             let slice_ptr = handle
 68 |                 .seek(toFileOffset: UInt64(8 + (Int(i) * 20)))
 69 |                 .readData(ofLength: MemoryLayout<fat_arch>.size)
 70 |                 .assumingMemoryBound(to: fat_arch.self)
 71 |             
 72 |             let slice = slice_ptr.pointee
 73 |             
 74 |             defer { slice_ptr.deallocate() }
 75 |             
 76 |             if slice.cputype.bigEndian == CPU_TYPE_ARM64 {
 77 |                                             
 78 |                 let slice_ptr = handle
 79 |                     .seek(toFileOffset: UInt64(8 + (Int(i) * 20)))
 80 |                     .readData(ofLength: MemoryLayout<fat_arch>.size)
 81 |                     .assumingMemoryBound(to: fat_arch.self)
 82 |                 
 83 |                 let slice = slice_ptr.pointee
 84 |                 
 85 |                 defer { slice_ptr.deallocate() }
 86 |                                 
 87 |                 if slice.cpusubtype == 0x2000080 { // new abi
 88 |                     return false
 89 |                 }
 90 |                 
 91 |                 if slice.cpusubtype == 0x2000000 { // old abi
 92 |                     return true
 93 |                 }
 94 |             }
 95 |         }
 96 |     }
 97 |     
 98 |     return false
 99 | }
100 | 
101 | print("RESULT:", looksLegacy("/Users/charlotte/Downloads/oldABI.dylib") == true)
102 | 
103 | print("RESULT:", looksLegacy("/Users/charlotte/Downloads/newABI.dylib") == false)
104 | 
105 | print("ATRIA:", looksLegacy("/Users/charlotte/Downloads/me.lau.atria_1.3-1.3_iphoneos-arm64/var/jb/Library/MobileSubstrate/DynamicLibraries/Atria.dylib") == true)
106 | 


--------------------------------------------------------------------------------