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Merge pull request #142 from p-x9/feature/support-old-prebuild-loader
[dyld cache] Support latest and older version of prebuilt loader
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Sources/MachOKit/Model/DyldCache/Loader/PrebuiltLoaderProtocol.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| // | ||
| // PrebuiltLoaderProtocol.swift | ||
| // MachOKit | ||
| // | ||
| // Created by p-x9 on 2024/11/09 | ||
| // | ||
| // | ||
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| import Foundation | ||
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| public protocol PrebuiltLoaderProtocol { | ||
| /// Address where this loader is located. | ||
| /// | ||
| /// Slides after loading are not included. | ||
| var address: Int { get } | ||
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| /// magic of loader starts | ||
| var magic: String? { get } | ||
| /// PrebuiltLoader vs JustInTimeLoader | ||
| var isPrebuilt: Bool { get } | ||
| var ref: LoaderRef { get } | ||
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| /// path for target mach-o image | ||
| /// - Parameter cache: DyldCache to which `self` belongs | ||
| /// - Returns: path name | ||
| func path(in cache: DyldCache) -> String? | ||
| /// loader reference list of target 's dependencies | ||
| /// - Parameter cache: DyldCache to which `self` belongs | ||
| /// - Returns: sequence of loader reference | ||
| func dependentLoaderRefs(in cache: DyldCache) -> DataSequence<LoaderRef>? | ||
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| /// path for target mach-o image | ||
| /// - Parameter cache: DyldCacheLoaded to which `self` belongs | ||
| /// - Returns: path name | ||
| func path(in cache: DyldCacheLoaded) -> String? | ||
| /// loader reference list of target 's dependencies | ||
| /// - Parameter cache: DyldCacheLoaded to which `self` belongs | ||
| /// - Returns: sequence of loader reference | ||
| func dependentLoaderRefs(in cache: DyldCacheLoaded) -> MemorySequence<LoaderRef>? | ||
| } |
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Sources/MachOKit/Model/DyldCache/Loader/PrebuiltLoader_Pre1165_3.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| // | ||
| // PrebuiltLoader_Pre1165_3.swift | ||
| // MachOKit | ||
| // | ||
| // Created by p-x9 on 2024/11/09 | ||
| // | ||
| // | ||
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| public struct PrebuiltLoader_Pre1165_3: LayoutWrapper, PrebuiltLoaderProtocol { | ||
| public typealias Layout = prebuilt_loader_pre1165_3 | ||
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| public var layout: Layout | ||
| public var address: Int | ||
| } | ||
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| extension PrebuiltLoader_Pre1165_3 { | ||
| // always true | ||
| public var isPrebuilt: Bool { | ||
| layout.loader.isPrebuilt != 0 | ||
| } | ||
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| public var ref: LoaderRef { | ||
| .init(layout: layout.loader.ref) | ||
| } | ||
| } | ||
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| extension PrebuiltLoader_Pre1165_3 { | ||
| public func path(in cache: DyldCache) -> String? { | ||
| guard let offset = cache.fileOffset( | ||
| of: numericCast(address) + numericCast(layout.pathOffset) | ||
| ) else { return nil } | ||
| return cache.fileHandle.readString(offset: offset) | ||
| } | ||
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| public func dependentLoaderRefs(in cache: DyldCache) -> DataSequence<LoaderRef>? { | ||
| guard layout.dependentLoaderRefsArrayOffset != 0, | ||
| let offset = cache.fileOffset( | ||
| of: numericCast(address) + numericCast(layout.dependentLoaderRefsArrayOffset) | ||
| ) else { | ||
| return nil | ||
| } | ||
| return cache.fileHandle.readDataSequence( | ||
| offset: offset, | ||
| numberOfElements: numericCast(layout.depCount) | ||
| ) | ||
| } | ||
| } | ||
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| extension PrebuiltLoader_Pre1165_3 { | ||
| public func path(in cache: DyldCacheLoaded) -> String? { | ||
| // swiftlint:disable:previous unused_parameter | ||
| guard let baseAddress = UnsafeRawPointer(bitPattern: address) else { | ||
| return nil | ||
| } | ||
| return String( | ||
| cString: baseAddress | ||
| .advanced(by: numericCast(layout.pathOffset)) | ||
| .assumingMemoryBound(to: CChar.self) | ||
| ) | ||
| } | ||
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| public func dependentLoaderRefs(in cache: DyldCacheLoaded) -> MemorySequence<LoaderRef>? { | ||
| // swiftlint:disable:previous unused_parameter | ||
| guard layout.dependentLoaderRefsArrayOffset != 0, | ||
| let baseAddress = UnsafeRawPointer(bitPattern: address) else { | ||
| return nil | ||
| } | ||
| return .init( | ||
| basePointer: baseAddress | ||
| .advanced(by: numericCast(layout.dependentLoaderRefsArrayOffset)) | ||
| .assumingMemoryBound(to: LoaderRef.self), | ||
| numberOfElements: numericCast(layout.depCount) | ||
| ) | ||
| } | ||
| } | ||
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| extension PrebuiltLoader_Pre1165_3 { | ||
| // [dyld implementation](https://github.com/apple-oss-distributions/dyld/blob/65bbeed63cec73f313b1d636e63f243964725a9d/dyld/Loader.h#L317) | ||
| public var magic: String? { | ||
| withUnsafeBytes(of: layout.loader.magic.bigEndian, { | ||
| let cString = $0.map({ CChar($0)} ) + [0] | ||
| return String( | ||
| cString: cString, | ||
| encoding: .utf8 | ||
| ) | ||
| }) | ||
| } | ||
| } |
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