mirror of
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233 lines
9.5 KiB
Objective-C
233 lines
9.5 KiB
Objective-C
// -*- mode: ObjC -*-
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// This file is part of class-dump, a utility for examining the Objective-C segment of Mach-O files.
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// Copyright (C) 1997-2019 Steve Nygard.
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#import "CDLoadCommand.h"
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#import "CDLCBuildVersion.h"
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#import "CDLCDyldInfo.h"
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#import "CDLCDylib.h"
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#import "CDLCDylinker.h"
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#import "CDLCDynamicSymbolTable.h"
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#import "CDLCEncryptionInfo.h"
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#import "CDLCFunctionStarts.h"
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#import "CDLCLinkeditData.h"
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#import "CDLCPrebindChecksum.h"
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#import "CDLCPreboundDylib.h"
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#import "CDLCRoutines32.h"
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#import "CDLCRoutines64.h"
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#import "CDLCRunPath.h"
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#import "CDLCSegment.h"
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#import "CDLCSubClient.h"
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#import "CDLCSubFramework.h"
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#import "CDLCSubLibrary.h"
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#import "CDLCSubUmbrella.h"
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#import "CDLCSymbolTable.h"
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#import "CDLCTwoLevelHints.h"
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#import "CDLCUnixThread.h"
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#import "CDLCUUID.h"
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#import "CDLCUnknown.h"
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#import "CDLCVersionMinimum.h"
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#import "CDMachOFile.h"
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#import "CDLCMain.h"
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#import "CDLCDataInCode.h"
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#import "CDLCSourceVersion.h"
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@implementation CDLoadCommand
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{
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__weak CDMachOFile *_machOFile;
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NSUInteger _commandOffset;
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}
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+ (id)loadCommandWithDataCursor:(CDMachOFileDataCursor *)cursor;
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{
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Class targetClass = [CDLCUnknown class];
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uint32_t val = [cursor peekInt32];
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switch (val) {
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case LC_SEGMENT: targetClass = [CDLCSegment class]; break;
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case LC_SEGMENT_64: targetClass = [CDLCSegment class]; break;
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case LC_SYMTAB: targetClass = [CDLCSymbolTable class]; break;
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//case LC_SYMSEG: // obsolete
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//case LC_THREAD: // not used?
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case LC_UNIXTHREAD: targetClass = [CDLCUnixThread class]; break;
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//case LC_LOADFVMLIB: // not used?
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//case LC_IDFVMLIB: // not used?
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//case LC_IDENT: // not used?
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//case LC_FVMFILE: // not used?
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//case LC_PREPAGE: // not used
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case LC_DYSYMTAB: targetClass = [CDLCDynamicSymbolTable class]; break;
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case LC_LOAD_DYLIB: targetClass = [CDLCDylib class]; break;
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case LC_ID_DYLIB: targetClass = [CDLCDylib class]; break;
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case LC_LOAD_DYLINKER: targetClass = [CDLCDylinker class]; break;
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case LC_ID_DYLINKER: targetClass = [CDLCDylinker class]; break;
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case LC_PREBOUND_DYLIB: targetClass = [CDLCPreboundDylib class]; break;
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case LC_ROUTINES: targetClass = [CDLCRoutines32 class]; break;
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case LC_SUB_FRAMEWORK: targetClass = [CDLCSubFramework class]; break;
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//case LC_SUB_UMBRELLA: targetClass = [CDLCSubUmbrella class]; break;
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case LC_SUB_CLIENT: targetClass = [CDLCSubClient class]; break;
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//case LC_SUB_LIBRARY: targetClass = [CDLCSubLibrary class]; break;
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case LC_TWOLEVEL_HINTS: targetClass = [CDLCTwoLevelHints class]; break;
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case LC_PREBIND_CKSUM: targetClass = [CDLCPrebindChecksum class]; break;
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case LC_LOAD_WEAK_DYLIB: targetClass = [CDLCDylib class]; break;
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case LC_ROUTINES_64: targetClass = [CDLCRoutines64 class]; break;
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case LC_UUID: targetClass = [CDLCUUID class]; break;
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case LC_RPATH: targetClass = [CDLCRunPath class]; break;
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case LC_CODE_SIGNATURE: targetClass = [CDLCLinkeditData class]; break;
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case LC_SEGMENT_SPLIT_INFO: targetClass = [CDLCLinkeditData class]; break;
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case LC_REEXPORT_DYLIB: targetClass = [CDLCDylib class]; break;
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case LC_LAZY_LOAD_DYLIB: targetClass = [CDLCDylib class]; break;
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case LC_ENCRYPTION_INFO:
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case LC_ENCRYPTION_INFO_64: targetClass = [CDLCEncryptionInfo class]; break;
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case LC_DYLD_INFO: targetClass = [CDLCDyldInfo class]; break;
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case LC_DYLD_INFO_ONLY: targetClass = [CDLCDyldInfo class]; break;
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case LC_LOAD_UPWARD_DYLIB: targetClass = [CDLCDylib class]; break;
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case LC_VERSION_MIN_MACOSX: targetClass = [CDLCVersionMinimum class]; break;
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case LC_VERSION_MIN_IPHONEOS: targetClass = [CDLCVersionMinimum class]; break;
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case LC_FUNCTION_STARTS: targetClass = [CDLCFunctionStarts class]; break;
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case LC_DYLD_ENVIRONMENT: targetClass = [CDLCDylinker class]; break;
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case LC_MAIN: targetClass = [CDLCMain class]; break;
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case LC_DATA_IN_CODE: targetClass = [CDLCDataInCode class]; break;
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case LC_SOURCE_VERSION: targetClass = [CDLCSourceVersion class]; break;
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case LC_DYLIB_CODE_SIGN_DRS: targetClass = [CDLCLinkeditData class]; break; // Designated Requirements
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case LC_BUILD_VERSION: targetClass = [CDLCBuildVersion class]; break;
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case LC_LINKER_OPTION:
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case LC_LINKER_OPTIMIZATION_HINT:
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case LC_VERSION_MIN_TVOS:
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case LC_VERSION_MIN_WATCHOS:
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case LC_NOTE:
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default:
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NSLog(@"Unknown load command: 0x%08x", val);
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};
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//NSLog(@"targetClass: %@", NSStringFromClass(targetClass));
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return [[targetClass alloc] initWithDataCursor:cursor];
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}
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- (id)initWithDataCursor:(CDMachOFileDataCursor *)cursor;
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{
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if ((self = [super init])) {
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_machOFile = [cursor machOFile];
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_commandOffset = [cursor offset];
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}
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return self;
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}
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#pragma mark - Debugging
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- (NSString *)description;
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{
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return [NSString stringWithFormat:@"<%@:%p> cmd: 0x%08x (%@), cmdsize: %d // %@",
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NSStringFromClass([self class]), self,
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self.cmd, self.commandName, self.cmdsize, [self extraDescription]];
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}
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- (NSString *)extraDescription;
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{
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return @"";
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}
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#pragma mark -
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- (uint32_t)cmd;
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{
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// Implement in subclasses
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[NSException raise:NSGenericException format:@"Must implement method in subclasses."];
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return 0;
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}
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- (uint32_t)cmdsize;
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{
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// Implement in subclasses
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[NSException raise:NSGenericException format:@"Must implement method in subclasses."];
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return 0;
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}
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- (BOOL)mustUnderstandToExecute;
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{
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return (self.cmd & LC_REQ_DYLD) != 0;
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}
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- (NSString *)commandName;
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{
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switch (self.cmd) {
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case LC_SEGMENT: return @"LC_SEGMENT";
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case LC_SYMTAB: return @"LC_SYMTAB";
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case LC_SYMSEG: return @"LC_SYMSEG";
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case LC_THREAD: return @"LC_THREAD";
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case LC_UNIXTHREAD: return @"LC_UNIXTHREAD";
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case LC_LOADFVMLIB: return @"LC_LOADFVMLIB";
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case LC_IDFVMLIB: return @"LC_IDFVMLIB";
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case LC_IDENT: return @"LC_IDENT";
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case LC_FVMFILE: return @"LC_FVMFILE";
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case LC_PREPAGE: return @"LC_PREPAGE";
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case LC_DYSYMTAB: return @"LC_DYSYMTAB";
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case LC_LOAD_DYLIB: return @"LC_LOAD_DYLIB";
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case LC_ID_DYLIB: return @"LC_ID_DYLIB";
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case LC_LOAD_DYLINKER: return @"LC_LOAD_DYLINKER";
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case LC_ID_DYLINKER: return @"LC_ID_DYLINKER";
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case LC_PREBOUND_DYLIB: return @"LC_PREBOUND_DYLIB";
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case LC_ROUTINES: return @"LC_ROUTINES";
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case LC_SUB_FRAMEWORK: return @"LC_SUB_FRAMEWORK";
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case LC_SUB_UMBRELLA: return @"LC_SUB_UMBRELLA";
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case LC_SUB_CLIENT: return @"LC_SUB_CLIENT";
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case LC_SUB_LIBRARY: return @"LC_SUB_LIBRARY";
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case LC_TWOLEVEL_HINTS: return @"LC_TWOLEVEL_HINTS";
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case LC_PREBIND_CKSUM: return @"LC_PREBIND_CKSUM";
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case LC_LOAD_WEAK_DYLIB: return @"LC_LOAD_WEAK_DYLIB";
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case LC_SEGMENT_64: return @"LC_SEGMENT_64";
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case LC_ROUTINES_64: return @"LC_ROUTINES_64";
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case LC_UUID: return @"LC_UUID";
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case LC_RPATH: return @"LC_RPATH";
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case LC_CODE_SIGNATURE: return @"LC_CODE_SIGNATURE";
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case LC_SEGMENT_SPLIT_INFO: return @"LC_SEGMENT_SPLIT_INFO";
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case LC_REEXPORT_DYLIB: return @"LC_REEXPORT_DYLIB";
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case LC_LAZY_LOAD_DYLIB: return @"LC_LAZY_LOAD_DYLIB";
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case LC_ENCRYPTION_INFO: return @"LC_ENCRYPTION_INFO";
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case LC_DYLD_INFO: return @"LC_DYLD_INFO";
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case LC_DYLD_INFO_ONLY: return @"LC_DYLD_INFO_ONLY";
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case LC_LOAD_UPWARD_DYLIB: return @"LC_LOAD_UPWARD_DYLIB";
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case LC_VERSION_MIN_MACOSX: return @"LC_VERSION_MIN_MACOSX";
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case LC_VERSION_MIN_IPHONEOS: return @"LC_VERSION_MIN_IPHONEOS";
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case LC_FUNCTION_STARTS: return @"LC_FUNCTION_STARTS";
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case LC_DYLD_ENVIRONMENT: return @"LC_DYLD_ENVIRONMENT";
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case LC_LINKER_OPTION: return @"LC_LINKER_OPTION";
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case LC_LINKER_OPTIMIZATION_HINT: return @"LC_LINKER_OPTIMIZATION_HINT";
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case LC_VERSION_MIN_TVOS: return @"LC_VERSION_MIN_TVOS";
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case LC_VERSION_MIN_WATCHOS: return @"LC_VERSION_MIN_WATCHOS";
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case LC_NOTE: return @"LC_NOTE";
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case LC_BUILD_VERSION: return @"LC_BUILD_VERSION";
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default:
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break;
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}
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return [NSString stringWithFormat:@"0x%08x", [self cmd]];
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}
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- (void)appendToString:(NSMutableString *)resultString verbose:(BOOL)isVerbose;
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{
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[resultString appendFormat:@" cmd %@", [self commandName]];
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if (self.mustUnderstandToExecute)
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[resultString appendFormat:@" (must understand to execute)"];
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[resultString appendFormat:@"\n"];
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[resultString appendFormat:@" cmdsize %u\n", [self cmdsize]];
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}
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- (void)machOFileDidReadLoadCommands:(CDMachOFile *)machOFile;
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{
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}
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@end
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