Index: class-dump/src/CDLCDynamicSymbolTable.m |
=================================================================== |
--- class-dump/src/CDLCDynamicSymbolTable.m (revision 0) |
+++ class-dump/src/CDLCDynamicSymbolTable.m (revision 0) |
@@ -0,0 +1,162 @@ |
+// -*- mode: ObjC -*- |
+ |
+// This file is part of class-dump, a utility for examining the Objective-C segment of Mach-O files. |
+// Copyright (C) 1997-1998, 2000-2001, 2004-2010 Steve Nygard. |
+ |
+#import "CDLCDynamicSymbolTable.h" |
+ |
+#import "CDFatFile.h" |
+#import "CDMachOFile.h" |
+#import "CDDataCursor.h" |
+#import "CDRelocationInfo.h" |
+ |
+@implementation CDLCDynamicSymbolTable |
+ |
+- (id)initWithDataCursor:(CDDataCursor *)cursor machOFile:(CDMachOFile *)aMachOFile; |
+{ |
+ if ([super initWithDataCursor:cursor machOFile:aMachOFile] == nil) |
+ return nil; |
+ |
+ dysymtab.cmd = [cursor readInt32]; |
+ dysymtab.cmdsize = [cursor readInt32]; |
+ |
+ dysymtab.ilocalsym = [cursor readInt32]; |
+ dysymtab.nlocalsym = [cursor readInt32]; |
+ dysymtab.iextdefsym = [cursor readInt32]; |
+ dysymtab.nextdefsym = [cursor readInt32]; |
+ dysymtab.iundefsym = [cursor readInt32]; |
+ dysymtab.nundefsym = [cursor readInt32]; |
+ dysymtab.tocoff = [cursor readInt32]; |
+ dysymtab.ntoc = [cursor readInt32]; |
+ dysymtab.modtaboff = [cursor readInt32]; |
+ dysymtab.nmodtab = [cursor readInt32]; |
+ dysymtab.extrefsymoff = [cursor readInt32]; |
+ dysymtab.nextrefsyms = [cursor readInt32]; |
+ dysymtab.indirectsymoff = [cursor readInt32]; |
+ dysymtab.nindirectsyms = [cursor readInt32]; |
+ dysymtab.extreloff = [cursor readInt32]; |
+ dysymtab.nextrel = [cursor readInt32]; |
+ dysymtab.locreloff = [cursor readInt32]; |
+ dysymtab.nlocrel = [cursor readInt32]; |
+#if 0 |
+ NSLog(@"ilocalsym: 0x%08x %d", dysymtab.ilocalsym, dysymtab.ilocalsym); |
+ NSLog(@"nlocalsym: 0x%08x %d", dysymtab.nlocalsym, dysymtab.nlocalsym); |
+ NSLog(@"iextdefsym: 0x%08x %d", dysymtab.iextdefsym, dysymtab.iextdefsym); |
+ NSLog(@"nextdefsym: 0x%08x %d", dysymtab.nextdefsym, dysymtab.nextdefsym); |
+ NSLog(@"iundefsym: 0x%08x %d", dysymtab.iundefsym, dysymtab.iundefsym); |
+ NSLog(@"nundefsym: 0x%08x %d", dysymtab.nundefsym, dysymtab.nundefsym); |
+ |
+ NSLog(@"tocoff: 0x%08x %d", dysymtab.tocoff, dysymtab.tocoff); |
+ NSLog(@"ntoc: 0x%08x %d", dysymtab.ntoc, dysymtab.ntoc); |
+ NSLog(@"modtaboff: 0x%08x %d", dysymtab.modtaboff, dysymtab.modtaboff); |
+ NSLog(@"nmodtab: 0x%08x %d", dysymtab.nmodtab, dysymtab.nmodtab); |
+ |
+ NSLog(@"extrefsymoff: 0x%08x %d", dysymtab.extrefsymoff, dysymtab.extrefsymoff); |
+ NSLog(@"nextrefsyms: 0x%08x %d", dysymtab.nextrefsyms, dysymtab.nextrefsyms); |
+ NSLog(@"indirectsymoff: 0x%08x %d", dysymtab.indirectsymoff, dysymtab.indirectsymoff); |
+ NSLog(@"nindirectsyms: 0x%08x %d", dysymtab.nindirectsyms, dysymtab.nindirectsyms); |
+ |
+ NSLog(@"extreloff: 0x%08x %d", dysymtab.extreloff, dysymtab.extreloff); |
+ NSLog(@"nextrel: 0x%08x %d", dysymtab.nextrel, dysymtab.nextrel); |
+ NSLog(@"locreloff: 0x%08x %d", dysymtab.locreloff, dysymtab.locreloff); |
+ NSLog(@"nlocrel: 0x%08x %d", dysymtab.nlocrel, dysymtab.nlocrel); |
+#endif |
+ |
+ externalRelocationEntries = [[NSMutableArray alloc] init]; |
+ |
+ return self; |
+} |
+ |
+- (void)dealloc; |
+{ |
+ [externalRelocationEntries release]; |
+ |
+ [super dealloc]; |
+} |
+ |
+- (uint32_t)cmd; |
+{ |
+ return dysymtab.cmd; |
+} |
+ |
+- (uint32_t)cmdsize; |
+{ |
+ return dysymtab.cmdsize; |
+} |
+ |
+- (void)loadSymbols; |
+{ |
+ CDDataCursor *cursor; |
+ uint32_t index; |
+ |
+ cursor = [[CDDataCursor alloc] initWithData:[nonretained_machOFile data]]; |
+ [cursor setByteOrder:[nonretained_machOFile byteOrder]]; |
+ |
+ //NSLog(@"indirectsymoff: %lu", dysymtab.indirectsymoff); |
+ //NSLog(@"nindirectsyms: %lu", dysymtab.nindirectsyms); |
+#if 0 |
+ [cursor setOffset:[nonretained_machOFile offset] + dysymtab.indirectsymoff]; |
+ for (index = 0; index < dysymtab.nindirectsyms; index++) { |
+ uint32_t val; |
+ |
+ // From loader.h: An indirect symbol table entry is simply a 32bit index into the symbol table to the symbol that the pointer or stub is referring to. |
+ val = [cursor readInt32]; |
+ NSLog(@"%3u: %08x (%u)", index, val, val); |
+ } |
+#endif |
+ |
+ //NSLog(@"extreloff: %lu", dysymtab.extreloff); |
+ //NSLog(@"nextrel: %lu", dysymtab.nextrel); |
+ |
+ [cursor setOffset:[nonretained_machOFile offset] + dysymtab.extreloff]; |
+ //NSLog(@" address val symbolnum pcrel len ext type"); |
+ //NSLog(@"--- -------- -------- --------- ----- --- --- ----"); |
+ for (index = 0; index < dysymtab.nextrel; index++) { |
+ struct relocation_info rinfo; |
+ uint32_t val; |
+ CDRelocationInfo *ri; |
+ |
+ rinfo.r_address = [cursor readInt32]; |
+ val = [cursor readInt32]; |
+ // TODO (2009-06-25): Make sure this works on PPC. |
+ rinfo.r_symbolnum = val & 0x00ffffff; |
+ rinfo.r_pcrel = (val & 0x01000000) >> 24; |
+ rinfo.r_length = (val & 0x06000000) >> 25; |
+ rinfo.r_extern = (val & 0x08000000) >> 27; |
+ rinfo.r_type = (val & 0xf0000000) >> 28; |
+#if 0 |
+ NSLog(@"%3d: %08x %08x %08x %01x %01x %01x %01x", index, rinfo.r_address, val, |
+ rinfo.r_symbolnum, rinfo.r_pcrel, rinfo.r_length, rinfo.r_extern, rinfo.r_type); |
+#endif |
+ |
+ ri = [[CDRelocationInfo alloc] initWithInfo:rinfo]; |
+ [externalRelocationEntries addObject:ri]; |
+ [ri release]; |
+ } |
+ |
+ //NSLog(@"externalRelocationEntries: %@", externalRelocationEntries); |
+ |
+ // r_address is purported to be the offset from the vmaddr of the first segment, but... |
+ // It seems to be from the first segment with r/w initprot. |
+ |
+ // it appears to be the offset from the vmaddr of the 3rd segment in t1s. |
+ // Actually, it really seems to be the offset from the vmaddr of the section indicated in the n_desc part of the nlist. |
+ // 0000000000000000 01 00 0500 0000000000000038 _OBJC_CLASS_$_NSObject |
+ // GET_LIBRARY_ORDINAL() from nlist.h for library. |
+ |
+ [cursor release]; |
+} |
+ |
+// Just search for externals. |
+- (CDRelocationInfo *)relocationEntryWithOffset:(NSUInteger)offset; |
+{ |
+ for (CDRelocationInfo *info in externalRelocationEntries) { |
+ if ([info isExtern] && [info offset] == offset) { |
+ return info; |
+ } |
+ } |
+ |
+ return nil; |
+} |
+ |
+@end |
Property changes on: class-dump/src/CDLCDynamicSymbolTable.m |
___________________________________________________________________ |
Added: svn:eol-style |
+ LF |