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MachOLayout.mm
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MachOLayout.mm
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/*
* MachOLayout.mm
* MachOView
*
* Created by psaghelyi on 15/06/2010.
*
*/
#import "Common.h"
#import "MachOLayout.h"
#import "DataController.h"
#import "ReadWrite.h"
#import "LoadCommands.h"
#import "LinkEdit.h"
#import "DyldInfo.h"
#import "Exceptions.h"
#import "SectionContents.h"
#import "ObjC.h"
#import "CRTFootPrints.h"
using namespace std;
//============================================================================
@implementation MachOLayout
// ----------------------------------------------------------------------------
- (id)init
{
NSAssert(NO, @"plain init is not allowed");
return nil;
}
//-----------------------------------------------------------------------------
- (id)initWithDataController:(MVDataController *)dc rootNode:(MVNode *)node
{
if (self = [super initWithDataController:dc rootNode:node])
{
symbolNames = [[NSMutableDictionary alloc] init];
}
return self;
}
//-----------------------------------------------------------------------------
+ (MachOLayout *)layoutWithDataController:(MVDataController *)dc rootNode:(MVNode *)node
{
return [[MachOLayout alloc] initWithDataController:dc rootNode:node];
}
//-----------------------------------------------------------------------------
- (BOOL)is64bit
{
MATCH_STRUCT(mach_header,imageOffset);
return ((mach_header->cputype & CPU_ARCH_ABI64) == CPU_ARCH_ABI64);
}
//-----------------------------------------------------------------------------
- (BOOL)isDylibStub
{
MATCH_STRUCT(mach_header,imageOffset);
return (mach_header->filetype == MH_DYLIB_STUB);
}
//-----------------------------------------------------------------------------
- (struct section const *)getSectionByIndex:(uint32_t)index
{
static const struct section notfound = { "???", "?????", 0, 0, 0, 0, 0, 0, 0, 0, 0 };
return (index < sections.size() ? sections.at(index) : ¬found);
}
//-----------------------------------------------------------------------------
- (struct section_64 const *)getSection64ByIndex:(uint32_t)index
{
static const struct section_64 notfound = { "???", "?????", 0, 0, 0, 0, 0, 0, 0, 0, 0 };
return (index < sections_64.size() ? sections_64.at(index) : ¬found);
}
//-----------------------------------------------------------------------------
- (struct nlist const *)getSymbolByIndex:(uint32_t)index
{
static const struct nlist notfound = { 0, 0, 0, 0, 0 };
return (index < symbols.size() ? symbols.at(index) : ¬found);
}
//-----------------------------------------------------------------------------
- (struct nlist_64 const *)getSymbol64ByIndex:(uint32_t)index
{
static const struct nlist_64 notfound = { 0, 0, 0, 0, 0 };
return (index < symbols_64.size() ? symbols_64.at(index) : ¬found);
}
//-----------------------------------------------------------------------------
- (struct dylib const *)getDylibByIndex:(uint32_t)index
{
static const struct dylib notfound = { 0, 0, 0, 0 };
return (index < dylibs.size() ? dylibs.at(index) : ¬found);
}
//-----------------------------------------------------------------------------
- (NSString *)findSymbolAtRVA:(uint32_t)rva
{
NSParameterAssert([self is64bit] == NO);
NSString * symbolName = [symbolNames objectForKey:[NSNumber numberWithUnsignedLong:rva]];
return (symbolName != nil ? symbolName : [NSString stringWithFormat:@"0x%X",rva]);
}
//-----------------------------------------------------------------------------
- (NSString *)findSymbolAtRVA64:(uint64_t)rva64
{
NSParameterAssert([self is64bit] == YES);
// extend external symbols represented in 32bit to 64bit
if ((int32_t)rva64 < 0)
{
rva64 |= 0xffffffff00000000LL;
}
NSString * symbolName = [symbolNames objectForKey:[NSNumber numberWithUnsignedLongLong:rva64]];
return (symbolName != nil ? symbolName : [NSString stringWithFormat:@"0x%qX",rva64]);
}
//-----------------------------------------------------------------------------
-(struct section const *)findSectionByName:(char const *)sectname
andSegment:(char const *)segname
{
for (SectionVector::const_iterator sectIter = ++sections.begin();
sectIter != sections.end(); ++sectIter)
{
struct section const * section = *sectIter;
if ((segname == NULL || strncmp(section->segname,segname,16) == 0) &&
strncmp(section->sectname,sectname,16) == 0)
{
return section;
}
}
return NULL;
}
//-----------------------------------------------------------------------------
-(struct section_64 const *)findSection64ByName:(char const *)sectname
andSegment:(char const *)segname
{
for (Section64Vector::const_iterator sectIter = ++sections_64.begin();
sectIter != sections_64.end(); ++sectIter)
{
struct section_64 const * section_64 = *sectIter;
if ((segname == NULL || strncmp(section_64->segname,segname,16) == 0) &&
strncmp(section_64->sectname,sectname,16) == 0)
{
return section_64;
}
}
return NULL;
}
//-----------------------------------------------------------------------------
- (uint32_t)fileOffsetToRVA: (uint32_t)offset
{
NSParameterAssert([self is64bit] == NO);
SegmentInfoMap::const_iterator segIter = segmentInfo.upper_bound(offset);
if (segIter == segmentInfo.begin())
{
[NSException raise:@"fileOffsetToRVA"
format:@"no segment found at offset 0x%X", offset];
}
--segIter;
uint32_t segOffset = segIter->first;
uint32_t segAddr = segIter->second.first;
return offset - segOffset + segAddr;
}
//-----------------------------------------------------------------------------
- (uint64_t)fileOffsetToRVA64: (uint32_t)offset
{
NSParameterAssert([self is64bit] == YES);
SegmentInfoMap::const_iterator segIter = segmentInfo.upper_bound(offset);
if (segIter == segmentInfo.begin())
{
[NSException raise:@"fileOffsetToRVA64"
format:@"no segment found at offset 0x%X", offset];
}
--segIter;
uint32_t segOffset = segIter->first;
uint64_t segAddr = segIter->second.first;
return offset - segOffset + segAddr;
}
// ----------------------------------------------------------------------------
- (uint32_t)RVAToFileOffset: (uint32_t)rva
{
NSParameterAssert([self is64bit] == NO);
SectionInfoMap::const_iterator sectIter = sectionInfo.upper_bound(rva);
if (sectIter == sectionInfo.begin())
{
[NSException raise:@"RVAToFileOffset"
format:@"no section found at address 0x%X", rva];
}
--sectIter;
uint32_t sectOffset = sectIter->second.first;
uint32_t fileOffset = sectOffset + (rva - [self fileOffsetToRVA:sectOffset]);
NSAssert1(fileOffset < [dataController.fileData length], @"rva is out of range (0x%X)", rva);
return fileOffset;
}
// ----------------------------------------------------------------------------
- (uint32_t)RVA64ToFileOffset: (uint64_t)rva64
{
NSParameterAssert([self is64bit] == YES);
SectionInfoMap::const_iterator sectIter = sectionInfo.upper_bound(rva64);
if (sectIter == sectionInfo.begin())
{
[NSException raise:@"RVA64ToFileOffset"
format:@"no section found at address 0x%qX", rva64];
}
--sectIter;
uint32_t sectOffset = sectIter->second.first;
uint32_t fileOffset = sectOffset + (rva64 - [self fileOffsetToRVA64:sectOffset]);
NSAssert1(fileOffset < [dataController.fileData length], @"rva is out of range (0x%qX)", rva64);
return fileOffset;
}
// ----------------------------------------------------------------------------
- (void)addRelocAtFileOffset:(uint32_t)offset withLength:(uint32_t)length andValue:(uint64_t)value
{
[dataController.realData replaceBytesInRange:NSMakeRange(offset,length) withBytes:&value];
}
// ----------------------------------------------------------------------------
static inline
uint32_t
_hex2int(char const * a, uint32_t len)
{
uint32_t val = 0;
for(uint32_t i = 0; i < len; i++)
{
if(a[i] <= '9')
{
val += (a[i]-'0')*(1<<(4*(len-1-i)));
}
else
{
val += (a[i]-'7')*(1<<(4*(len-1-i)));
}
}
return val;
}
// ----------------------------------------------------------------------------
// RAW string to RVA string converter for data source
- (NSString *)convertToRVA: (NSString *)offsetStr
{
uint32_t fileOffset;
/*
BOOL scanResult = [[NSScanner scannerWithString:offsetStr] scanHexInt:&fileOffset];
// return empty string if it is out of bounds
if (scanResult == NO || segmentInfo.empty() ||
fileOffset < segmentInfo.begin()->first ||
fileOffset + 1 >= (--segmentInfo.end())->first + (--segmentInfo.end())->second.second)
{
return @"";
}
*/
// _hex2int is supposed to be must faster
// note: on problems use the traditional scanner!
fileOffset = _hex2int(CSTRING(offsetStr), [offsetStr length]);
if (segmentInfo.empty() ||
fileOffset < segmentInfo.begin()->first ||
fileOffset + 1 >= (--segmentInfo.end())->first + (--segmentInfo.end())->second.second)
{
return @"";
}
return ([self is64bit] == NO
? [NSString stringWithFormat:@"%.8X",[self fileOffsetToRVA:fileOffset]]
: [NSString stringWithFormat:@"%.8qX",[self fileOffsetToRVA64:fileOffset]]);
}
// ----------------------------------------------------------------------------
- (NSDictionary *)userInfoForSection:(struct section const *)section
{
if (section == NULL) return nil;
typeof(self) __weak weakSelf = self;
return [NSDictionary dictionaryWithObjectsAndKeys:
weakSelf,MVLayoutUserInfoKey,
NSSTRING(string(section->segname,16).c_str()), @"segname",
NSSTRING(string(section->sectname,16).c_str()), @"sectname",
[NSNumber numberWithUnsignedLong:section->addr], @"address",
nil];
}
//-----------------------------------------------------------------------------
- (NSDictionary *)userInfoForSection64:(struct section_64 const *)section_64
{
if (section_64 == NULL) return nil;
typeof(self) __weak weakSelf = self;
return [NSDictionary dictionaryWithObjectsAndKeys:
weakSelf,MVLayoutUserInfoKey,
NSSTRING(string(section_64->segname,16).c_str()), @"segname",
NSSTRING(string(section_64->sectname,16).c_str()), @"sectname",
[NSNumber numberWithUnsignedLongLong:section_64->addr], @"address",
nil];
}
//-----------------------------------------------------------------------------
- (NSDictionary *)userInfoForRelocs
{
typeof(self) __weak weakSelf = self;
return [NSDictionary dictionaryWithObjectsAndKeys:
weakSelf,MVLayoutUserInfoKey,
@"Relocations", MVNodeUserInfoKey,
nil];
}
//-----------------------------------------------------------------------------
- (NSDictionary *)sectionInfoForRVA:(uint32_t)rva
{
NSParameterAssert([self is64bit] == NO);
SectionInfoMap::iterator iter = sectionInfo.upper_bound(rva);
if (iter == sectionInfo.begin())
{
NSLog(@"warning: no section info found for address 0x%.8X",rva);
return nil;
}
return (--iter)->second.second;
}
//-----------------------------------------------------------------------------
- (NSDictionary *)sectionInfoForRVA64:(uint64_t)rva64
{
NSParameterAssert([self is64bit] == YES);
SectionInfoMap::iterator iter = sectionInfo.upper_bound(rva64);
if (iter == sectionInfo.begin())
{
NSLog(@"warning: no section info found for address 0x%.16qX",rva64);
return nil;
}
return (--iter)->second.second;
}
//-----------------------------------------------------------------------------
- (NSString *)findSectionContainsRVA:(uint32_t)rva
{
NSDictionary * userInfo = [self sectionInfoForRVA:rva];
return (userInfo ? [NSString stringWithFormat:@"%8s %-16s",
CSTRING([userInfo objectForKey:@"segname"]),
CSTRING([userInfo objectForKey:@"sectname"])] : @"NO SECTION ");
}
//-----------------------------------------------------------------------------
- (NSString *)findSectionContainsRVA64:(uint64_t)rva64
{
NSDictionary * userInfo = [self sectionInfoForRVA64:rva64];
return (userInfo ? [NSString stringWithFormat:@"%8s %-16s",
CSTRING([userInfo objectForKey:@"segname"]),
CSTRING([userInfo objectForKey:@"sectname"])] : @"NO SECTION ");
}
//------------------------------------------------------------------------------
- (MVNode *)sectionNodeContainsRVA:(uint32_t)rva
{
NSDictionary * userInfo = [self sectionInfoForRVA:rva];
return (userInfo ? [self findNodeByUserInfo:userInfo] : nil);
}
//------------------------------------------------------------------------------
- (MVNode *)sectionNodeContainsRVA64:(uint64_t)rva64
{
NSDictionary * userInfo = [self sectionInfoForRVA64:rva64];
return (userInfo ? [self findNodeByUserInfo:userInfo] : nil);
}
//-----------------------------------------------------------------------------
-(void) processLinkEdit
{
// find related load commands
struct symtab_command const * symtab_command = NULL;
struct dysymtab_command const * dysymtab_command = NULL;
struct twolevel_hints_command const * twolevel_hints_command = NULL;
struct linkedit_data_command const * segment_split_info = NULL;
struct linkedit_data_command const * code_signature = NULL;
struct linkedit_data_command const * function_starts = NULL;
struct linkedit_data_command const * data_in_code_entries = NULL;
MATCH_STRUCT(mach_header,imageOffset);
uint32_t base_addr;
uint32_t seg1addr = (uint32_t)-1;
uint32_t segs_read_write_addr = (uint32_t)-1;
for (CommandVector::const_iterator cmdIter = commands.begin(); cmdIter != commands.end(); ++cmdIter)
{
struct load_command const * load_command = *cmdIter;
switch (load_command->cmd)
{
case LC_SEGMENT:
{
struct segment_command const * segment_command = (struct segment_command const *)load_command;
if (segment_command->fileoff == 0 && segment_command->filesize != 0)
{
base_addr = segment_command->vmaddr;
}
if(segment_command->vmaddr < seg1addr)
{
seg1addr = segment_command->vmaddr;
}
// Pickup the address of the first read-write segment for MH_SPLIT_SEGS images.
if((segment_command->initprot & VM_PROT_WRITE) == VM_PROT_WRITE &&
segment_command->vmaddr < segs_read_write_addr)
{
segs_read_write_addr = segment_command->vmaddr;
}
} break;
case LC_SYMTAB: symtab_command = (struct symtab_command const *)load_command; break;
case LC_DYSYMTAB: dysymtab_command = (struct dysymtab_command const *)load_command; break;
case LC_TWOLEVEL_HINTS: twolevel_hints_command = (struct twolevel_hints_command const *)load_command; break;
case LC_SEGMENT_SPLIT_INFO: segment_split_info = (struct linkedit_data_command const *)load_command; break;
case LC_CODE_SIGNATURE: code_signature = (struct linkedit_data_command const *)load_command; break;
case LC_FUNCTION_STARTS: function_starts = (struct linkedit_data_command const *)load_command; break;
case LC_DATA_IN_CODE: data_in_code_entries = (struct linkedit_data_command const *)load_command; break;
default: ; // not interested
}
}
MVNode * symtabNode = nil;
MVNode * dysymtabNode = nil;
MVNode * twoLevelHintsNode = nil;
MVNode * segmentSplitInfoNode = nil;
MVNode * functionStartsNode = nil;
MVNode * dataInCodeEntriesNode = nil;
NSString * lastNodeCaption;
if (symtab_command)
{
symtabNode = [self createDataNode:rootNode
caption:@"Symbol Table"
location:symtab_command->symoff + imageOffset
length:symtab_command->nsyms * sizeof(struct nlist)];
[self createDataNode:rootNode
caption:@"String Table"
location:symtab_command->stroff + imageOffset
length:symtab_command->strsize];
}
if (dysymtab_command)
{
NSRange dysymtabRange = NSMakeRange(0,0);
if (dysymtab_command->tocoff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->tocoff + imageOffset, dysymtab_command->ntoc * sizeof(struct dylib_table_of_contents));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtab_command->modtaboff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->modtaboff + imageOffset, dysymtab_command->nmodtab * sizeof(struct dylib_module));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtab_command->extrefsymoff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->extrefsymoff + imageOffset, dysymtab_command->nextrefsyms * sizeof(struct dylib_reference));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtab_command->indirectsymoff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->indirectsymoff + imageOffset, dysymtab_command->nindirectsyms * sizeof(uint32_t));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtab_command->extreloff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->extreloff + imageOffset, dysymtab_command->nextrel * sizeof(struct relocation_info));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtab_command->locreloff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->locreloff + imageOffset, dysymtab_command->nlocrel * sizeof(struct relocation_info));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtabRange.length > 0)
{
dysymtabNode = [self createDataNode:rootNode
caption:@"Dynamic Symbol Table"
location:dysymtabRange.location
length:dysymtabRange.length];
}
}
if (twolevel_hints_command)
{
twoLevelHintsNode = [self createDataNode:rootNode
caption:@"Two Level Hints Table"
location:twolevel_hints_command->offset + imageOffset
length:twolevel_hints_command->nhints * sizeof(struct twolevel_hint)];
}
if (segment_split_info)
{
segmentSplitInfoNode = [self createDataNode:rootNode
caption:@"Segment Split Info"
location:segment_split_info->dataoff + imageOffset
length:segment_split_info->datasize];
}
if (code_signature)
{
[self createDataNode:rootNode
caption:@"Code Signature"
location:code_signature->dataoff + imageOffset
length:code_signature->datasize];
}
if (function_starts)
{
functionStartsNode = [self createDataNode:rootNode
caption:@"Function Starts"
location:function_starts->dataoff + imageOffset
length:function_starts->datasize];
}
if (data_in_code_entries)
{
dataInCodeEntriesNode = [self createDataNode:rootNode
caption:@"Data in Code Entries"
location:data_in_code_entries->dataoff + imageOffset
length:data_in_code_entries->datasize];
}
//============ Symbol Table ====================
//==============================================
if (symtabNode)
{
@try
{
[self createSymbolsNode:symtabNode
caption:(lastNodeCaption = @"Symbols")
location:symtabNode.dataRange.location
length:symtabNode.dataRange.length];
}
@catch(NSException * exception)
{
[self printException:exception caption:lastNodeCaption];
}
}
//=========== Dynamic Symbol Table =============
//==============================================
if (dysymtabNode)
{
@try
{
//=============== Module Table =================
//==============================================
if (dysymtab_command->modtaboff * dysymtab_command->nmodtab > 0)
{
[self createModulesNode:dysymtabNode
caption:(lastNodeCaption = @"Modules")
location:dysymtab_command->modtaboff + imageOffset
length:dysymtab_command->nmodtab * sizeof(struct dylib_module)];
}
//========== Table of Contents =================
//==============================================
if (dysymtab_command->tocoff * dysymtab_command->ntoc > 0)
{
[self createTOCNode:dysymtabNode
caption:(lastNodeCaption = @"Table of Contents")
location:dysymtab_command->tocoff + imageOffset
length:dysymtab_command->ntoc * sizeof(struct dylib_table_of_contents)];
}
//======= External Reference Table =============
//==============================================
if (dysymtab_command->extrefsymoff * dysymtab_command->nextrefsyms > 0)
{
[self createReferencesNode:dysymtabNode
caption:(lastNodeCaption = @"External References")
location:dysymtab_command->extrefsymoff + imageOffset
length:dysymtab_command->nextrefsyms * sizeof(struct dylib_reference)];
}
//========== Indirect Symbol Table =============
//==============================================
if (dysymtab_command->indirectsymoff * dysymtab_command->nindirectsyms > 0)
{
[self createISymbolsNode:dysymtabNode
caption:(lastNodeCaption = @"Indirect Symbols")
location:dysymtab_command->indirectsymoff + imageOffset
length:dysymtab_command->nindirectsyms * sizeof(uint32_t)];
}
//========== External Reloc Table ==============
//==============================================
if (dysymtab_command->extreloff * dysymtab_command->nextrel > 0)
{
[self createRelocNode:dysymtabNode
caption:(lastNodeCaption = @"External Relocations")
location:dysymtab_command->extreloff + imageOffset
length:dysymtab_command->nextrel * sizeof(struct relocation_info)
baseAddress:(mach_header->flags & MH_SPLIT_SEGS) == MH_SPLIT_SEGS ? segs_read_write_addr : seg1addr];
}
//=========== Local Reloc Table ================
//==============================================
if (dysymtab_command->locreloff * dysymtab_command->nlocrel > 0)
{
[self createRelocNode:dysymtabNode
caption:(lastNodeCaption = @"Local Relocations")
location:dysymtab_command->locreloff + imageOffset
length:dysymtab_command->nlocrel * sizeof(struct relocation_info)
baseAddress:(mach_header->flags & MH_SPLIT_SEGS) == MH_SPLIT_SEGS ? segs_read_write_addr : seg1addr];
}
}
@catch(NSException * exception)
{
[self printException:exception caption:lastNodeCaption];
}
}
if (twoLevelHintsNode && twoLevelHintsNode.dataRange.length > 0)
{
@try
{
[self createTwoLevelHintsNode:twoLevelHintsNode
caption:(lastNodeCaption = @"Hints")
location:twoLevelHintsNode.dataRange.location
length:twoLevelHintsNode.dataRange.length
index:dysymtab_command->iundefsym];
}
@catch(NSException * exception)
{
[self printException:exception caption:lastNodeCaption];
}
}
if (segmentSplitInfoNode && segmentSplitInfoNode.dataRange.length > 0)
{
@try
{
[self createSplitSegmentNode:segmentSplitInfoNode
caption:(lastNodeCaption = @"Shared Region Info")
location:segmentSplitInfoNode.dataRange.location
length:segmentSplitInfoNode.dataRange.length
baseAddress:base_addr];
}
@catch(NSException * exception)
{
[self printException:exception caption:lastNodeCaption];
}
}
if (functionStartsNode && functionStartsNode.dataRange.length > 0)
{
@try
{
[self createFunctionStartsNode:functionStartsNode
caption:(lastNodeCaption = @"Functions")
location:functionStartsNode.dataRange.location
length:functionStartsNode.dataRange.length
baseAddress:base_addr];
}
@catch(NSException * exception)
{
[self printException:exception caption:lastNodeCaption];
}
}
if (dataInCodeEntriesNode && dataInCodeEntriesNode.dataRange.length > 0)
{
@try
{
[self createDataInCodeEntriesNode:dataInCodeEntriesNode
caption:(lastNodeCaption = @"Dices")
location:dataInCodeEntriesNode.dataRange.location
length:dataInCodeEntriesNode.dataRange.length];
}
@catch(NSException * exception)
{
[self printException:exception caption:lastNodeCaption];
}
}
}
//-----------------------------------------------------------------------------
-(void) processLinkEdit64
{
// find related load commands
struct symtab_command const * symtab_command = NULL;
struct dysymtab_command const * dysymtab_command = NULL;
struct twolevel_hints_command const * twolevel_hints_command = NULL;
struct linkedit_data_command const * segment_split_info = NULL;
struct linkedit_data_command const * code_signature = NULL;
struct linkedit_data_command const * function_starts = NULL;
struct linkedit_data_command const * data_in_code_entries = NULL;
MATCH_STRUCT(mach_header_64,imageOffset);
uint64_t base_addr;
uint64_t seg1addr = (uint64_t)-1LL;
uint64_t segs_read_write_addr = (uint64_t)-1LL;
for (CommandVector::const_iterator cmdIter = commands.begin(); cmdIter != commands.end(); ++cmdIter)
{
struct load_command const * load_command = *cmdIter;
switch (load_command->cmd)
{
case LC_SEGMENT_64:
{
struct segment_command_64 const * segment_command_64 = (struct segment_command_64 const *)load_command;
if (segment_command_64->fileoff == 0 && segment_command_64->filesize != 0)
{
base_addr = segment_command_64->vmaddr;
}
if(segment_command_64->vmaddr < seg1addr)
{
seg1addr = segment_command_64->vmaddr;
}
// Pickup the address of the first read-write segment for MH_SPLIT_SEGS images.
if((segment_command_64->initprot & VM_PROT_WRITE) == VM_PROT_WRITE &&
segment_command_64->vmaddr < segs_read_write_addr)
{
segs_read_write_addr = segment_command_64->vmaddr;
}
} break;
case LC_SYMTAB: symtab_command = (struct symtab_command const *)load_command; break;
case LC_DYSYMTAB: dysymtab_command = (struct dysymtab_command const *)load_command; break;
case LC_TWOLEVEL_HINTS: twolevel_hints_command = (struct twolevel_hints_command const *)load_command; break;
case LC_SEGMENT_SPLIT_INFO: segment_split_info = (struct linkedit_data_command const *)load_command; break;
case LC_CODE_SIGNATURE: code_signature = (struct linkedit_data_command const *)load_command; break;
case LC_FUNCTION_STARTS: function_starts = (struct linkedit_data_command const *)load_command; break;
case LC_DATA_IN_CODE: data_in_code_entries = (struct linkedit_data_command const *)load_command; break;
default: ; // not interested
}
}
MVNode * symtabNode = nil;
MVNode *stringNode = nil;
MVNode * dysymtabNode = nil;
MVNode * twoLevelHintsNode = nil;
MVNode * segmentSplitInfoNode = nil;
MVNode * functionStartsNode = nil;
MVNode * dataInCodeEntriesNode = nil;
NSString * lastNodeCaption;
if (symtab_command)
{
symtabNode = [self createDataNode:rootNode
caption:@"Symbol Table"
location:symtab_command->symoff + imageOffset
length:symtab_command->nsyms * sizeof(struct nlist_64)];
stringNode = [self createDataNode:rootNode
caption:@"String Table"
location:symtab_command->stroff + imageOffset
length:symtab_command->strsize];
}
if (dysymtab_command)
{
NSRange dysymtabRange = NSMakeRange(0,0);
if (dysymtab_command->tocoff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->tocoff + imageOffset, dysymtab_command->ntoc * sizeof(struct dylib_table_of_contents));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtab_command->modtaboff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->modtaboff + imageOffset, dysymtab_command->nmodtab * sizeof(struct dylib_module_64));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtab_command->extrefsymoff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->extrefsymoff + imageOffset, dysymtab_command->nextrefsyms * sizeof(struct dylib_reference));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtab_command->indirectsymoff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->indirectsymoff + imageOffset, dysymtab_command->nindirectsyms * sizeof(uint32_t));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtab_command->extreloff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->extreloff + imageOffset, dysymtab_command->nextrel * sizeof(struct relocation_info));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtab_command->locreloff > 0)
{
NSRange range = NSMakeRange(dysymtab_command->locreloff + imageOffset, dysymtab_command->nlocrel * sizeof(struct relocation_info));
dysymtabRange = NSMaxRange(dysymtabRange) > 0 ? NSUnionRange(dysymtabRange, range) : range;
}
if (dysymtabRange.length > 0)
{
dysymtabNode = [self createDataNode:rootNode
caption:@"Dynamic Symbol Table"
location:dysymtabRange.location
length:dysymtabRange.length];
}
}
if (twolevel_hints_command)
{
twoLevelHintsNode = [self createDataNode:rootNode
caption:@"Two Level Hints Table"
location:twolevel_hints_command->offset + imageOffset
length:twolevel_hints_command->nhints * sizeof(struct twolevel_hint)];
}
if (segment_split_info)
{
segmentSplitInfoNode = [self createDataNode:rootNode
caption:@"Segment Split Info"
location:segment_split_info->dataoff + imageOffset
length:segment_split_info->datasize];
}
if (code_signature)
{
[self createDataNode:rootNode
caption:@"Code Signature"
location:code_signature->dataoff + imageOffset
length:code_signature->datasize];
}
if (function_starts)
{
functionStartsNode = [self createDataNode:rootNode
caption:@"Function Starts"
location:function_starts->dataoff + imageOffset
length:function_starts->datasize];
}
if (data_in_code_entries)
{
dataInCodeEntriesNode = [self createDataNode:rootNode
caption:@"Data in Code Entries"
location:data_in_code_entries->dataoff + imageOffset
length:data_in_code_entries->datasize];
}
//============ Symbol Table ====================
//==============================================
if (symtabNode)
{
@try
{
[self createSymbols64Node:symtabNode
caption:(lastNodeCaption = @"Symbols")
location:symtabNode.dataRange.location
length:symtabNode.dataRange.length];
//解析string table
if (stringNode && symtab_command->stroff && symtab_command->strsize > 0) {
[self createStringTableNode:stringNode caption:@"Strings" location:symtab_command->stroff length:symtab_command->strsize];
}
}
@catch(NSException * exception)
{
[self printException:exception caption:lastNodeCaption];
}
}
//=========== Dynamic Symbol Table =============
//==============================================
if (dysymtabNode)
{
@try
{
//=============== Module Table =================
//==============================================
if (dysymtab_command->modtaboff * dysymtab_command->nmodtab > 0)
{
[self createModules64Node:dysymtabNode
caption:(lastNodeCaption = @"Modules64")
location:dysymtab_command->modtaboff + imageOffset
length:dysymtab_command->nmodtab * sizeof(struct dylib_module_64)];
}
//========== Table of Contents =================
//==============================================
if (dysymtab_command->tocoff * dysymtab_command->ntoc > 0)
{
[self createTOC64Node:dysymtabNode
caption:(lastNodeCaption = @"Table of Contents")
location:dysymtab_command->tocoff + imageOffset
length:dysymtab_command->ntoc * sizeof(struct dylib_table_of_contents)];
}
//======= External Reference Table =============
//==============================================
if (dysymtab_command->extrefsymoff * dysymtab_command->nextrefsyms > 0)
{
[self createReferencesNode:dysymtabNode
caption:(lastNodeCaption = @"External References")
location:dysymtab_command->extrefsymoff + imageOffset
length:dysymtab_command->nextrefsyms * sizeof(struct dylib_reference)];
}
//========== Indirect Symbol Table =============
//==============================================
if (dysymtab_command->indirectsymoff * dysymtab_command->nindirectsyms > 0)
{
[self createISymbols64Node:dysymtabNode
caption:(lastNodeCaption = @"Indirect Symbols")
location:dysymtab_command->indirectsymoff + imageOffset
length:dysymtab_command->nindirectsyms * sizeof(uint32_t)];
}
//========== External Reloc Table ==============
//==============================================
if (dysymtab_command->extreloff * dysymtab_command->nextrel > 0)
{
[self createReloc64Node:dysymtabNode
caption:(lastNodeCaption = @"External Relocations")
location:dysymtab_command->extreloff + imageOffset
length:dysymtab_command->nextrel * sizeof(struct relocation_info)
baseAddress:(mach_header_64->flags & MH_SPLIT_SEGS) == MH_SPLIT_SEGS ? segs_read_write_addr : seg1addr];
}
//=========== Local Reloc Table ================
//==============================================
if (dysymtab_command->locreloff * dysymtab_command->nlocrel > 0)
{
[self createReloc64Node:dysymtabNode
caption:(lastNodeCaption = @"Local Reloc Table")
location:dysymtab_command->locreloff + imageOffset
length:dysymtab_command->nlocrel * sizeof(struct relocation_info)
baseAddress:(mach_header_64->flags & MH_SPLIT_SEGS) == MH_SPLIT_SEGS ? segs_read_write_addr : seg1addr];
}
}
@catch(NSException * exception)
{
[self printException:exception caption:lastNodeCaption];
}
}
if (twoLevelHintsNode && twoLevelHintsNode.dataRange.length > 0)
{
@try
{
[self createTwoLevelHintsNode:twoLevelHintsNode
caption:(lastNodeCaption = @"Hints")
location:twoLevelHintsNode.dataRange.location
length:twoLevelHintsNode.dataRange.length
index:dysymtab_command->iundefsym];
}
@catch(NSException * exception)
{
[self printException:exception caption:lastNodeCaption];
}
}
if (segmentSplitInfoNode && segmentSplitInfoNode.dataRange.length > 0)
{
@try
{
[self createSplitSegmentNode:segmentSplitInfoNode
caption:(lastNodeCaption = @"Shared Region Info")
location:segmentSplitInfoNode.dataRange.location
length:segmentSplitInfoNode.dataRange.length
baseAddress:base_addr];
}
@catch(NSException * exception)
{
[self printException:exception caption:lastNodeCaption];
}
}
if (functionStartsNode && functionStartsNode.dataRange.length > 0)
{
@try
{
[self createFunctionStartsNode:functionStartsNode
caption:(lastNodeCaption = @"Functions")
location:functionStartsNode.dataRange.location
length:functionStartsNode.dataRange.length
baseAddress:base_addr];
}
@catch(NSException * exception)
{
[self printException:exception caption:lastNodeCaption];
}
}
if (dataInCodeEntriesNode && dataInCodeEntriesNode.dataRange.length > 0)