segfaults on iOS 15 binaries

[lechium]

running on any binaries from iOS/tvOS 15 with --swift or --objc flags gets an immediate segfault crash. I think its related to the newer load commands introduced in iOS 13 but didnt get heavily utilized until 15, specifically LC_DYLD_EXPORTS_TRIE and LC_DYLD_CHAINED_FIXUPS

figured adding details from the crash log might help!

Process:               dsdump [2314]
Path:                  /Users/USER/*/dsdump
Identifier:            dsdump
Version:               0
Code Type:             X86-64 (Native)
Parent Process:        zsh [429]
Responsible:           iTerm2 [279]
User ID:               501

Date/Time:             2021-09-23 21:57:53.537 -0700
OS Version:            Mac OS X 10.15.4 (19E266)
Report Version:        12
Anonymous UUID:        7D913AF8-DD55-3534-9C1B-3FEC8697F1F0


Time Awake Since Boot: 14000 seconds

System Integrity Protection: disabled

Crashed Thread:        0  Dispatch queue: com.apple.main-thread

Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
Exception Codes:       KERN_INVALID_ADDRESS at 0x000000000000002c
Exception Note:        EXC_CORPSE_NOTIFY

Termination Signal:    Segmentation fault: 11
Termination Reason:    Namespace SIGNAL, Code 0xb
Terminating Process:   exc handler [2314]

VM Regions Near 0x2c:
--> 
    __TEXT                 0000000100000000-0000000100376000 [ 3544K] r-x/r-x SM=COW  /Users/USER/*

Application Specific Information:
dyld2 mode

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   dsdump                        	0x0000000100014779 -[XRMachOLibrary(Opcode) parseDYLDExports] + 34
1   dsdump                        	0x0000000100009819 -[XRMachOLibrary initWithPath:] + 5198
2   dsdump                        	0x0000000100018c46 main + 1258
3   libdyld.dylib                 	0x00007fff72237cc9 start + 1

Thread 0 crashed with X86 Thread State (64-bit):
  rax: 0x0000000000000000  rbx: 0x0000000101304490  rcx: 0x0000000000000000  rdx: 0x000000000000000d
  rdi: 0x0000000101304490  rsi: 0x000000010012bfe1  rbp: 0x00007ffeefbfefd0  rsp: 0x00007ffeefbfef70
   r8: 0x000000000000004f   r9: 0x0000000101307385  r10: 0x0000000100000000  r11: 0x000000010000bb3d
  r12: 0x0000000400010657  r13: 0x00007fff7108be40  r14: 0x000000010052ce18  r15: 0x0000000101304490
  rip: 0x0000000100014779  rfl: 0x0000000000010202  cr2: 0x000000000000002c
  
Logical CPU:     6
Error Code:      0x00000004 (no mapping for user data read)
Trap Number:     14

[DerekSelander]

Thanks will look into it